From aa83b388943858c071e0e729c17ef813ac0d21da Mon Sep 17 00:00:00 2001
From: Alexey Pustovalov <alexey.pustovalov@zabbix.com>
Date: Sat, 10 Apr 2021 00:02:09 -0400
Subject: [PATCH 1/4] Updated unsupported releases. Zabbix 3.0

---
 snmptraps/alpine/README.md | 2 +-
 snmptraps/centos/README.md | 2 +-
 snmptraps/ubuntu/README.md | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/snmptraps/alpine/README.md b/snmptraps/alpine/README.md
index 35e120ef6..471da9d1d 100644
--- a/snmptraps/alpine/README.md
+++ b/snmptraps/alpine/README.md
@@ -48,7 +48,7 @@ Where `some-zabbix-snmptraps` is the name you want to assign to your container a
 
 ## Linking Zabbix server or Zabbix proxy with the container
 
-    docker run --name some-zabbix-server --link some-zabbix-snmptraps:zabbix-snmptraps --volumes-from some-zabbix-snmptraps -p 162:1162/udp -d zabbix/zabbix-server:tag
+    docker run --name some-zabbix-server --link some-zabbix-snmptraps:zabbix-snmptraps --volumes-from some-zabbix-snmptraps -d zabbix/zabbix-server:tag
 
 ## Container shell access and viewing Zabbix snmptraps logs
 
diff --git a/snmptraps/centos/README.md b/snmptraps/centos/README.md
index 35e120ef6..471da9d1d 100644
--- a/snmptraps/centos/README.md
+++ b/snmptraps/centos/README.md
@@ -48,7 +48,7 @@ Where `some-zabbix-snmptraps` is the name you want to assign to your container a
 
 ## Linking Zabbix server or Zabbix proxy with the container
 
-    docker run --name some-zabbix-server --link some-zabbix-snmptraps:zabbix-snmptraps --volumes-from some-zabbix-snmptraps -p 162:1162/udp -d zabbix/zabbix-server:tag
+    docker run --name some-zabbix-server --link some-zabbix-snmptraps:zabbix-snmptraps --volumes-from some-zabbix-snmptraps -d zabbix/zabbix-server:tag
 
 ## Container shell access and viewing Zabbix snmptraps logs
 
diff --git a/snmptraps/ubuntu/README.md b/snmptraps/ubuntu/README.md
index 35e120ef6..471da9d1d 100644
--- a/snmptraps/ubuntu/README.md
+++ b/snmptraps/ubuntu/README.md
@@ -48,7 +48,7 @@ Where `some-zabbix-snmptraps` is the name you want to assign to your container a
 
 ## Linking Zabbix server or Zabbix proxy with the container
 
-    docker run --name some-zabbix-server --link some-zabbix-snmptraps:zabbix-snmptraps --volumes-from some-zabbix-snmptraps -p 162:1162/udp -d zabbix/zabbix-server:tag
+    docker run --name some-zabbix-server --link some-zabbix-snmptraps:zabbix-snmptraps --volumes-from some-zabbix-snmptraps -d zabbix/zabbix-server:tag
 
 ## Container shell access and viewing Zabbix snmptraps logs
 

From fe57f5c5e0b5244e3de7c1727bcaf7bbea163eeb Mon Sep 17 00:00:00 2001
From: Alexey Pustovalov <alexey.pustovalov@zabbix.com>
Date: Sat, 10 Apr 2021 06:39:18 -0400
Subject: [PATCH 2/4] Added Zabbix agent 2 Ubuntu image

---
 .github/workflows/CI.yml | 2 --
 1 file changed, 2 deletions(-)

diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index 585ac1074..8796f8845 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -50,8 +50,6 @@ jobs:
         exclude:
           - os: centos
             build: agent2
-          - os: ubuntu
-            build: agent2
 
     runs-on: ubuntu-20.04
     steps:

From d4bae351e84a2ae23d5f4fbc72741dd711d96254 Mon Sep 17 00:00:00 2001
From: Alexey Pustovalov <alexey.pustovalov@zabbix.com>
Date: Sun, 11 Apr 2021 21:43:41 -0400
Subject: [PATCH 3/4] Ignore case for boolean vars

---
 agent/alpine/docker-entrypoint.sh            |  6 +++---
 agent/centos/docker-entrypoint.sh            |  6 +++---
 agent/ubuntu/docker-entrypoint.sh            |  6 +++---
 java-gateway/alpine/docker-entrypoint.sh     |  2 +-
 java-gateway/centos/docker-entrypoint.sh     |  2 +-
 java-gateway/ubuntu/docker-entrypoint.sh     |  2 +-
 proxy-mysql/alpine/docker-entrypoint.sh      | 16 ++++++++--------
 proxy-mysql/centos/docker-entrypoint.sh      | 16 ++++++++--------
 proxy-mysql/ubuntu/docker-entrypoint.sh      | 16 ++++++++--------
 proxy-sqlite3/alpine/docker-entrypoint.sh    |  6 +++---
 proxy-sqlite3/centos/docker-entrypoint.sh    |  6 +++---
 proxy-sqlite3/ubuntu/docker-entrypoint.sh    |  6 +++---
 server-mysql/alpine/docker-entrypoint.sh     | 16 ++++++++--------
 server-mysql/centos/docker-entrypoint.sh     | 16 ++++++++--------
 server-mysql/ubuntu/docker-entrypoint.sh     | 16 ++++++++--------
 server-pgsql/alpine/docker-entrypoint.sh     |  8 ++++----
 server-pgsql/centos/docker-entrypoint.sh     |  8 ++++----
 server-pgsql/ubuntu/docker-entrypoint.sh     |  8 ++++----
 web-apache-mysql/alpine/docker-entrypoint.sh | 16 +++++++++-------
 web-apache-mysql/centos/docker-entrypoint.sh | 16 +++++++++-------
 web-apache-mysql/ubuntu/docker-entrypoint.sh | 16 +++++++++-------
 web-apache-pgsql/alpine/docker-entrypoint.sh |  8 +++++---
 web-apache-pgsql/centos/docker-entrypoint.sh |  8 +++++---
 web-apache-pgsql/ubuntu/docker-entrypoint.sh |  8 +++++---
 web-nginx-mysql/alpine/docker-entrypoint.sh  | 18 ++++++++++--------
 web-nginx-mysql/centos/docker-entrypoint.sh  | 18 ++++++++++--------
 web-nginx-mysql/ubuntu/docker-entrypoint.sh  | 18 ++++++++++--------
 web-nginx-pgsql/alpine/docker-entrypoint.sh  |  8 +++++---
 web-nginx-pgsql/centos/docker-entrypoint.sh  |  8 +++++---
 web-nginx-pgsql/ubuntu/docker-entrypoint.sh  |  8 +++++---
 30 files changed, 168 insertions(+), 144 deletions(-)

diff --git a/agent/alpine/docker-entrypoint.sh b/agent/alpine/docker-entrypoint.sh
index 32f56cc60..a31cbbb23 100755
--- a/agent/alpine/docker-entrypoint.sh
+++ b/agent/alpine/docker-entrypoint.sh
@@ -5,7 +5,7 @@ set -o pipefail
 set +e
 
 # Script trace mode
-if [ "${DEBUG_MODE}" == "true" ]; then
+if [ "${DEBUG_MODE,,}" == "true" ]; then
     set -o xtrace
 fi
 
@@ -134,7 +134,7 @@ prepare_zbx_agent_config() {
     update_config_var $ZBX_AGENT_CONFIG "LogRemoteCommands" "${ZBX_LOGREMOTECOMMANDS}"
 
     : ${ZBX_PASSIVE_ALLOW:="true"}
-    if [ "$ZBX_PASSIVE_ALLOW" == "true" ]; then
+    if [ "${ZBX_PASSIVE_ALLOW,,}" == "true" ]; then
         echo "** Using '$ZBX_PASSIVESERVERS' servers for passive checks"
         update_config_var $ZBX_AGENT_CONFIG "Server" "${ZBX_PASSIVESERVERS}"
     else
@@ -146,7 +146,7 @@ prepare_zbx_agent_config() {
     update_config_var $ZBX_AGENT_CONFIG "StartAgents" "${ZBX_STARTAGENTS}"
 
     : ${ZBX_ACTIVE_ALLOW:="true"}
-    if [ "$ZBX_ACTIVE_ALLOW" == "true" ]; then
+    if [ "${ZBX_ACTIVE_ALLOW,,}" == "true" ]; then
         echo "** Using '$ZBX_ACTIVESERVERS' servers for active checks"
         update_config_var $ZBX_AGENT_CONFIG "ServerActive" "${ZBX_ACTIVESERVERS}"
     else
diff --git a/agent/centos/docker-entrypoint.sh b/agent/centos/docker-entrypoint.sh
index 32f56cc60..a31cbbb23 100755
--- a/agent/centos/docker-entrypoint.sh
+++ b/agent/centos/docker-entrypoint.sh
@@ -5,7 +5,7 @@ set -o pipefail
 set +e
 
 # Script trace mode
-if [ "${DEBUG_MODE}" == "true" ]; then
+if [ "${DEBUG_MODE,,}" == "true" ]; then
     set -o xtrace
 fi
 
@@ -134,7 +134,7 @@ prepare_zbx_agent_config() {
     update_config_var $ZBX_AGENT_CONFIG "LogRemoteCommands" "${ZBX_LOGREMOTECOMMANDS}"
 
     : ${ZBX_PASSIVE_ALLOW:="true"}
-    if [ "$ZBX_PASSIVE_ALLOW" == "true" ]; then
+    if [ "${ZBX_PASSIVE_ALLOW,,}" == "true" ]; then
         echo "** Using '$ZBX_PASSIVESERVERS' servers for passive checks"
         update_config_var $ZBX_AGENT_CONFIG "Server" "${ZBX_PASSIVESERVERS}"
     else
@@ -146,7 +146,7 @@ prepare_zbx_agent_config() {
     update_config_var $ZBX_AGENT_CONFIG "StartAgents" "${ZBX_STARTAGENTS}"
 
     : ${ZBX_ACTIVE_ALLOW:="true"}
-    if [ "$ZBX_ACTIVE_ALLOW" == "true" ]; then
+    if [ "${ZBX_ACTIVE_ALLOW,,}" == "true" ]; then
         echo "** Using '$ZBX_ACTIVESERVERS' servers for active checks"
         update_config_var $ZBX_AGENT_CONFIG "ServerActive" "${ZBX_ACTIVESERVERS}"
     else
diff --git a/agent/ubuntu/docker-entrypoint.sh b/agent/ubuntu/docker-entrypoint.sh
index 32f56cc60..a31cbbb23 100755
--- a/agent/ubuntu/docker-entrypoint.sh
+++ b/agent/ubuntu/docker-entrypoint.sh
@@ -5,7 +5,7 @@ set -o pipefail
 set +e
 
 # Script trace mode
-if [ "${DEBUG_MODE}" == "true" ]; then
+if [ "${DEBUG_MODE,,}" == "true" ]; then
     set -o xtrace
 fi
 
@@ -134,7 +134,7 @@ prepare_zbx_agent_config() {
     update_config_var $ZBX_AGENT_CONFIG "LogRemoteCommands" "${ZBX_LOGREMOTECOMMANDS}"
 
     : ${ZBX_PASSIVE_ALLOW:="true"}
-    if [ "$ZBX_PASSIVE_ALLOW" == "true" ]; then
+    if [ "${ZBX_PASSIVE_ALLOW,,}" == "true" ]; then
         echo "** Using '$ZBX_PASSIVESERVERS' servers for passive checks"
         update_config_var $ZBX_AGENT_CONFIG "Server" "${ZBX_PASSIVESERVERS}"
     else
@@ -146,7 +146,7 @@ prepare_zbx_agent_config() {
     update_config_var $ZBX_AGENT_CONFIG "StartAgents" "${ZBX_STARTAGENTS}"
 
     : ${ZBX_ACTIVE_ALLOW:="true"}
-    if [ "$ZBX_ACTIVE_ALLOW" == "true" ]; then
+    if [ "${ZBX_ACTIVE_ALLOW,,}" == "true" ]; then
         echo "** Using '$ZBX_ACTIVESERVERS' servers for active checks"
         update_config_var $ZBX_AGENT_CONFIG "ServerActive" "${ZBX_ACTIVESERVERS}"
     else
diff --git a/java-gateway/alpine/docker-entrypoint.sh b/java-gateway/alpine/docker-entrypoint.sh
index ec5223733..01ac14cd1 100755
--- a/java-gateway/alpine/docker-entrypoint.sh
+++ b/java-gateway/alpine/docker-entrypoint.sh
@@ -5,7 +5,7 @@ set -o pipefail
 set +e
 
 # Script trace mode
-if [ "${DEBUG_MODE}" == "true" ]; then
+if [ "${DEBUG_MODE,,}" == "true" ]; then
     set -o xtrace
 fi
 
diff --git a/java-gateway/centos/docker-entrypoint.sh b/java-gateway/centos/docker-entrypoint.sh
index ec5223733..01ac14cd1 100755
--- a/java-gateway/centos/docker-entrypoint.sh
+++ b/java-gateway/centos/docker-entrypoint.sh
@@ -5,7 +5,7 @@ set -o pipefail
 set +e
 
 # Script trace mode
-if [ "${DEBUG_MODE}" == "true" ]; then
+if [ "${DEBUG_MODE,,}" == "true" ]; then
     set -o xtrace
 fi
 
diff --git a/java-gateway/ubuntu/docker-entrypoint.sh b/java-gateway/ubuntu/docker-entrypoint.sh
index ec5223733..01ac14cd1 100755
--- a/java-gateway/ubuntu/docker-entrypoint.sh
+++ b/java-gateway/ubuntu/docker-entrypoint.sh
@@ -5,7 +5,7 @@ set -o pipefail
 set +e
 
 # Script trace mode
-if [ "${DEBUG_MODE}" == "true" ]; then
+if [ "${DEBUG_MODE,,}" == "true" ]; then
     set -o xtrace
 fi
 
diff --git a/proxy-mysql/alpine/docker-entrypoint.sh b/proxy-mysql/alpine/docker-entrypoint.sh
index 458b5283f..3d2794c41 100755
--- a/proxy-mysql/alpine/docker-entrypoint.sh
+++ b/proxy-mysql/alpine/docker-entrypoint.sh
@@ -5,7 +5,7 @@ set -o pipefail
 set +e
 
 # Script trace mode
-if [ "${DEBUG_MODE}" == "true" ]; then
+if [ "${DEBUG_MODE,,}" == "true" ]; then
     set -o xtrace
 fi
 
@@ -150,17 +150,17 @@ check_variables_mysql() {
 
     file_env MYSQL_ROOT_PASSWORD
 
-    if [ ! -n "${MYSQL_USER}" ] && [ "${MYSQL_RANDOM_ROOT_PASSWORD}" == "true" ]; then
+    if [ ! -n "${MYSQL_USER}" ] && [ "${MYSQL_RANDOM_ROOT_PASSWORD,,}" == "true" ]; then
         echo "**** Impossible to use MySQL server because of unknown Zabbix user and random 'root' password"
         exit 1
     fi
 
-    if [ ! -n "${MYSQL_USER}" ] && [ ! -n "${MYSQL_ROOT_PASSWORD}" ] && [ "${MYSQL_ALLOW_EMPTY_PASSWORD}" != "true" ]; then
+    if [ ! -n "${MYSQL_USER}" ] && [ ! -n "${MYSQL_ROOT_PASSWORD}" ] && [ "${MYSQL_ALLOW_EMPTY_PASSWORD,,}" != "true" ]; then
         echo "*** Impossible to use MySQL server because 'root' password is not defined and it is not empty"
         exit 1
     fi
 
-    if [ "${MYSQL_ALLOW_EMPTY_PASSWORD}" == "true" ] || [ -n "${MYSQL_ROOT_PASSWORD}" ]; then
+    if [ "${MYSQL_ALLOW_EMPTY_PASSWORD,,}" == "true" ] || [ -n "${MYSQL_ROOT_PASSWORD}" ]; then
         USE_DB_ROOT_USER=true
         DB_SERVER_ROOT_USER="root"
         DB_SERVER_ROOT_PASS=${MYSQL_ROOT_PASSWORD:-""}
@@ -170,7 +170,7 @@ check_variables_mysql() {
 
     # If root password is not specified use provided credentials
     DB_SERVER_ROOT_USER=${DB_SERVER_ROOT_USER:-${MYSQL_USER}}
-    [ "${MYSQL_ALLOW_EMPTY_PASSWORD}" == "true" ] || DB_SERVER_ROOT_PASS=${DB_SERVER_ROOT_PASS:-${MYSQL_PASSWORD}}
+    [ "${MYSQL_ALLOW_EMPTY_PASSWORD,,}" == "true" ] || DB_SERVER_ROOT_PASS=${DB_SERVER_ROOT_PASS:-${MYSQL_PASSWORD}}
     DB_SERVER_ZBX_USER=${MYSQL_USER:-"zabbix"}
     DB_SERVER_ZBX_PASS=${MYSQL_PASSWORD:-"zabbix"}
 
@@ -182,7 +182,7 @@ check_db_connect_mysql() {
     echo "* DB_SERVER_HOST: ${DB_SERVER_HOST}"
     echo "* DB_SERVER_PORT: ${DB_SERVER_PORT}"
     echo "* DB_SERVER_DBNAME: ${DB_SERVER_DBNAME}"
-    if [ "${DEBUG_MODE}" == "true" ]; then
+    if [ "${DEBUG_MODE,,}" == "true" ]; then
         if [ "${USE_DB_ROOT_USER}" == "true" ]; then
             echo "* DB_SERVER_ROOT_USER: ${DB_SERVER_ROOT_USER}"
             echo "* DB_SERVER_ROOT_PASS: ${DB_SERVER_ROOT_PASS}"
@@ -321,7 +321,7 @@ update_zbx_config() {
     update_config_var $ZBX_CONFIG "StartHTTPPollers" "${ZBX_STARTHTTPPOLLERS}"
 
     : ${ZBX_JAVAGATEWAY_ENABLE:="false"}
-    if [ "${ZBX_JAVAGATEWAY_ENABLE}" == "true" ]; then
+    if [ "${ZBX_JAVAGATEWAY_ENABLE,,}" == "true" ]; then
         update_config_var $ZBX_CONFIG "JavaGateway" "${ZBX_JAVAGATEWAY:-"zabbix-java-gateway"}"
         update_config_var $ZBX_CONFIG "JavaGatewayPort" "${ZBX_JAVAGATEWAYPORT}"
         update_config_var $ZBX_CONFIG "StartJavaPollers" "${ZBX_STARTJAVAPOLLERS:-"5"}"
@@ -338,7 +338,7 @@ update_zbx_config() {
     update_config_var $ZBX_CONFIG "VMwareTimeout" "${ZBX_VMWARETIMEOUT}"
 
     : ${ZBX_ENABLE_SNMP_TRAPS:="false"}
-    if [ "${ZBX_ENABLE_SNMP_TRAPS}" == "true" ]; then
+    if [ "${ZBX_ENABLE_SNMP_TRAPS,,}" == "true" ]; then
         update_config_var $ZBX_CONFIG "SNMPTrapperFile" "${ZABBIX_USER_HOME_DIR}/snmptraps/snmptraps.log"
         update_config_var $ZBX_CONFIG "StartSNMPTrapper" "1"
     else
diff --git a/proxy-mysql/centos/docker-entrypoint.sh b/proxy-mysql/centos/docker-entrypoint.sh
index 5b234b394..9f2450b43 100755
--- a/proxy-mysql/centos/docker-entrypoint.sh
+++ b/proxy-mysql/centos/docker-entrypoint.sh
@@ -5,7 +5,7 @@ set -o pipefail
 set +e
 
 # Script trace mode
-if [ "${DEBUG_MODE}" == "true" ]; then
+if [ "${DEBUG_MODE,,}" == "true" ]; then
     set -o xtrace
 fi
 
@@ -150,17 +150,17 @@ check_variables_mysql() {
 
     file_env MYSQL_ROOT_PASSWORD
 
-    if [ ! -n "${MYSQL_USER}" ] && [ "${MYSQL_RANDOM_ROOT_PASSWORD}" == "true" ]; then
+    if [ ! -n "${MYSQL_USER}" ] && [ "${MYSQL_RANDOM_ROOT_PASSWORD,,}" == "true" ]; then
         echo "**** Impossible to use MySQL server because of unknown Zabbix user and random 'root' password"
         exit 1
     fi
 
-    if [ ! -n "${MYSQL_USER}" ] && [ ! -n "${MYSQL_ROOT_PASSWORD}" ] && [ "${MYSQL_ALLOW_EMPTY_PASSWORD}" != "true" ]; then
+    if [ ! -n "${MYSQL_USER}" ] && [ ! -n "${MYSQL_ROOT_PASSWORD}" ] && [ "${MYSQL_ALLOW_EMPTY_PASSWORD,,}" != "true" ]; then
         echo "*** Impossible to use MySQL server because 'root' password is not defined and it is not empty"
         exit 1
     fi
 
-    if [ "${MYSQL_ALLOW_EMPTY_PASSWORD}" == "true" ] || [ -n "${MYSQL_ROOT_PASSWORD}" ]; then
+    if [ "${MYSQL_ALLOW_EMPTY_PASSWORD,,}" == "true" ] || [ -n "${MYSQL_ROOT_PASSWORD}" ]; then
         USE_DB_ROOT_USER=true
         DB_SERVER_ROOT_USER="root"
         DB_SERVER_ROOT_PASS=${MYSQL_ROOT_PASSWORD:-""}
@@ -170,7 +170,7 @@ check_variables_mysql() {
 
     # If root password is not specified use provided credentials
     DB_SERVER_ROOT_USER=${DB_SERVER_ROOT_USER:-${MYSQL_USER}}
-    [ "${MYSQL_ALLOW_EMPTY_PASSWORD}" == "true" ] || DB_SERVER_ROOT_PASS=${DB_SERVER_ROOT_PASS:-${MYSQL_PASSWORD}}
+    [ "${MYSQL_ALLOW_EMPTY_PASSWORD,,}" == "true" ] || DB_SERVER_ROOT_PASS=${DB_SERVER_ROOT_PASS:-${MYSQL_PASSWORD}}
     DB_SERVER_ZBX_USER=${MYSQL_USER:-"zabbix"}
     DB_SERVER_ZBX_PASS=${MYSQL_PASSWORD:-"zabbix"}
 
@@ -182,7 +182,7 @@ check_db_connect_mysql() {
     echo "* DB_SERVER_HOST: ${DB_SERVER_HOST}"
     echo "* DB_SERVER_PORT: ${DB_SERVER_PORT}"
     echo "* DB_SERVER_DBNAME: ${DB_SERVER_DBNAME}"
-    if [ "${DEBUG_MODE}" == "true" ]; then
+    if [ "${DEBUG_MODE,,}" == "true" ]; then
         if [ "${USE_DB_ROOT_USER}" == "true" ]; then
             echo "* DB_SERVER_ROOT_USER: ${DB_SERVER_ROOT_USER}"
             echo "* DB_SERVER_ROOT_PASS: ${DB_SERVER_ROOT_PASS}"
@@ -321,7 +321,7 @@ update_zbx_config() {
     update_config_var $ZBX_CONFIG "StartHTTPPollers" "${ZBX_STARTHTTPPOLLERS}"
 
     : ${ZBX_JAVAGATEWAY_ENABLE:="false"}
-    if [ "${ZBX_JAVAGATEWAY_ENABLE}" == "true" ]; then
+    if [ "${ZBX_JAVAGATEWAY_ENABLE,,}" == "true" ]; then
         update_config_var $ZBX_CONFIG "JavaGateway" "${ZBX_JAVAGATEWAY:-"zabbix-java-gateway"}"
         update_config_var $ZBX_CONFIG "JavaGatewayPort" "${ZBX_JAVAGATEWAYPORT}"
         update_config_var $ZBX_CONFIG "StartJavaPollers" "${ZBX_STARTJAVAPOLLERS:-"5"}"
@@ -338,7 +338,7 @@ update_zbx_config() {
     update_config_var $ZBX_CONFIG "VMwareTimeout" "${ZBX_VMWARETIMEOUT}"
 
     : ${ZBX_ENABLE_SNMP_TRAPS:="false"}
-    if [ "${ZBX_ENABLE_SNMP_TRAPS}" == "true" ]; then
+    if [ "${ZBX_ENABLE_SNMP_TRAPS,,}" == "true" ]; then
         update_config_var $ZBX_CONFIG "SNMPTrapperFile" "${ZABBIX_USER_HOME_DIR}/snmptraps/snmptraps.log"
         update_config_var $ZBX_CONFIG "StartSNMPTrapper" "1"
     else
diff --git a/proxy-mysql/ubuntu/docker-entrypoint.sh b/proxy-mysql/ubuntu/docker-entrypoint.sh
index 7f28723cc..9b949a8e3 100755
--- a/proxy-mysql/ubuntu/docker-entrypoint.sh
+++ b/proxy-mysql/ubuntu/docker-entrypoint.sh
@@ -5,7 +5,7 @@ set -o pipefail
 set +e
 
 # Script trace mode
-if [ "${DEBUG_MODE}" == "true" ]; then
+if [ "${DEBUG_MODE,,}" == "true" ]; then
     set -o xtrace
 fi
 
@@ -150,17 +150,17 @@ check_variables_mysql() {
 
     file_env MYSQL_ROOT_PASSWORD
 
-    if [ ! -n "${MYSQL_USER}" ] && [ "${MYSQL_RANDOM_ROOT_PASSWORD}" == "true" ]; then
+    if [ ! -n "${MYSQL_USER}" ] && [ "${MYSQL_RANDOM_ROOT_PASSWORD,,}" == "true" ]; then
         echo "**** Impossible to use MySQL server because of unknown Zabbix user and random 'root' password"
         exit 1
     fi
 
-    if [ ! -n "${MYSQL_USER}" ] && [ ! -n "${MYSQL_ROOT_PASSWORD}" ] && [ "${MYSQL_ALLOW_EMPTY_PASSWORD}" != "true" ]; then
+    if [ ! -n "${MYSQL_USER}" ] && [ ! -n "${MYSQL_ROOT_PASSWORD}" ] && [ "${MYSQL_ALLOW_EMPTY_PASSWORD,,}" != "true" ]; then
         echo "*** Impossible to use MySQL server because 'root' password is not defined and it is not empty"
         exit 1
     fi
 
-    if [ "${MYSQL_ALLOW_EMPTY_PASSWORD}" == "true" ] || [ -n "${MYSQL_ROOT_PASSWORD}" ]; then
+    if [ "${MYSQL_ALLOW_EMPTY_PASSWORD,,}" == "true" ] || [ -n "${MYSQL_ROOT_PASSWORD}" ]; then
         USE_DB_ROOT_USER=true
         DB_SERVER_ROOT_USER="root"
         DB_SERVER_ROOT_PASS=${MYSQL_ROOT_PASSWORD:-""}
@@ -170,7 +170,7 @@ check_variables_mysql() {
 
     # If root password is not specified use provided credentials
     DB_SERVER_ROOT_USER=${DB_SERVER_ROOT_USER:-${MYSQL_USER}}
-    [ "${MYSQL_ALLOW_EMPTY_PASSWORD}" == "true" ] || DB_SERVER_ROOT_PASS=${DB_SERVER_ROOT_PASS:-${MYSQL_PASSWORD}}
+    [ "${MYSQL_ALLOW_EMPTY_PASSWORD,,}" == "true" ] || DB_SERVER_ROOT_PASS=${DB_SERVER_ROOT_PASS:-${MYSQL_PASSWORD}}
     DB_SERVER_ZBX_USER=${MYSQL_USER:-"zabbix"}
     DB_SERVER_ZBX_PASS=${MYSQL_PASSWORD:-"zabbix"}
 
@@ -182,7 +182,7 @@ check_db_connect_mysql() {
     echo "* DB_SERVER_HOST: ${DB_SERVER_HOST}"
     echo "* DB_SERVER_PORT: ${DB_SERVER_PORT}"
     echo "* DB_SERVER_DBNAME: ${DB_SERVER_DBNAME}"
-    if [ "${DEBUG_MODE}" == "true" ]; then
+    if [ "${DEBUG_MODE,,}" == "true" ]; then
         if [ "${USE_DB_ROOT_USER}" == "true" ]; then
             echo "* DB_SERVER_ROOT_USER: ${DB_SERVER_ROOT_USER}"
             echo "* DB_SERVER_ROOT_PASS: ${DB_SERVER_ROOT_PASS}"
@@ -321,7 +321,7 @@ update_zbx_config() {
     update_config_var $ZBX_CONFIG "StartHTTPPollers" "${ZBX_STARTHTTPPOLLERS}"
 
     : ${ZBX_JAVAGATEWAY_ENABLE:="false"}
-    if [ "${ZBX_JAVAGATEWAY_ENABLE}" == "true" ]; then
+    if [ "${ZBX_JAVAGATEWAY_ENABLE,,}" == "true" ]; then
         update_config_var $ZBX_CONFIG "JavaGateway" "${ZBX_JAVAGATEWAY:-"zabbix-java-gateway"}"
         update_config_var $ZBX_CONFIG "JavaGatewayPort" "${ZBX_JAVAGATEWAYPORT}"
         update_config_var $ZBX_CONFIG "StartJavaPollers" "${ZBX_STARTJAVAPOLLERS:-"5"}"
@@ -338,7 +338,7 @@ update_zbx_config() {
     update_config_var $ZBX_CONFIG "VMwareTimeout" "${ZBX_VMWARETIMEOUT}"
 
     : ${ZBX_ENABLE_SNMP_TRAPS:="false"}
-    if [ "${ZBX_ENABLE_SNMP_TRAPS}" == "true" ]; then
+    if [ "${ZBX_ENABLE_SNMP_TRAPS,,}" == "true" ]; then
         update_config_var $ZBX_CONFIG "SNMPTrapperFile" "${ZABBIX_USER_HOME_DIR}/snmptraps/snmptraps.log"
         update_config_var $ZBX_CONFIG "StartSNMPTrapper" "1"
     else
diff --git a/proxy-sqlite3/alpine/docker-entrypoint.sh b/proxy-sqlite3/alpine/docker-entrypoint.sh
index 2173886fb..39d39e097 100755
--- a/proxy-sqlite3/alpine/docker-entrypoint.sh
+++ b/proxy-sqlite3/alpine/docker-entrypoint.sh
@@ -5,7 +5,7 @@ set -o pipefail
 set +e
 
 # Script trace mode
-if [ "${DEBUG_MODE}" == "true" ]; then
+if [ "${DEBUG_MODE,,}" == "true" ]; then
     set -o xtrace
 fi
 
@@ -158,7 +158,7 @@ update_zbx_config() {
     update_config_var $ZBX_CONFIG "StartHTTPPollers" "${ZBX_STARTHTTPPOLLERS}"
 
     : ${ZBX_JAVAGATEWAY_ENABLE:="false"}
-    if [ "${ZBX_JAVAGATEWAY_ENABLE}" == "true" ]; then
+    if [ "${ZBX_JAVAGATEWAY_ENABLE,,}" == "true" ]; then
         update_config_var $ZBX_CONFIG "JavaGateway" "${ZBX_JAVAGATEWAY:-"zabbix-java-gateway"}"
         update_config_var $ZBX_CONFIG "JavaGatewayPort" "${ZBX_JAVAGATEWAYPORT}"
         update_config_var $ZBX_CONFIG "StartJavaPollers" "${ZBX_STARTJAVAPOLLERS:-"5"}"
@@ -175,7 +175,7 @@ update_zbx_config() {
     update_config_var $ZBX_CONFIG "VMwareTimeout" "${ZBX_VMWARETIMEOUT}"
 
     : ${ZBX_ENABLE_SNMP_TRAPS:="false"}
-    if [ "${ZBX_ENABLE_SNMP_TRAPS}" == "true" ]; then
+    if [ "${ZBX_ENABLE_SNMP_TRAPS,,}" == "true" ]; then
         update_config_var $ZBX_CONFIG "SNMPTrapperFile" "${ZABBIX_USER_HOME_DIR}/snmptraps/snmptraps.log"
         update_config_var $ZBX_CONFIG "StartSNMPTrapper" "1"
     else
diff --git a/proxy-sqlite3/centos/docker-entrypoint.sh b/proxy-sqlite3/centos/docker-entrypoint.sh
index 2173886fb..39d39e097 100755
--- a/proxy-sqlite3/centos/docker-entrypoint.sh
+++ b/proxy-sqlite3/centos/docker-entrypoint.sh
@@ -5,7 +5,7 @@ set -o pipefail
 set +e
 
 # Script trace mode
-if [ "${DEBUG_MODE}" == "true" ]; then
+if [ "${DEBUG_MODE,,}" == "true" ]; then
     set -o xtrace
 fi
 
@@ -158,7 +158,7 @@ update_zbx_config() {
     update_config_var $ZBX_CONFIG "StartHTTPPollers" "${ZBX_STARTHTTPPOLLERS}"
 
     : ${ZBX_JAVAGATEWAY_ENABLE:="false"}
-    if [ "${ZBX_JAVAGATEWAY_ENABLE}" == "true" ]; then
+    if [ "${ZBX_JAVAGATEWAY_ENABLE,,}" == "true" ]; then
         update_config_var $ZBX_CONFIG "JavaGateway" "${ZBX_JAVAGATEWAY:-"zabbix-java-gateway"}"
         update_config_var $ZBX_CONFIG "JavaGatewayPort" "${ZBX_JAVAGATEWAYPORT}"
         update_config_var $ZBX_CONFIG "StartJavaPollers" "${ZBX_STARTJAVAPOLLERS:-"5"}"
@@ -175,7 +175,7 @@ update_zbx_config() {
     update_config_var $ZBX_CONFIG "VMwareTimeout" "${ZBX_VMWARETIMEOUT}"
 
     : ${ZBX_ENABLE_SNMP_TRAPS:="false"}
-    if [ "${ZBX_ENABLE_SNMP_TRAPS}" == "true" ]; then
+    if [ "${ZBX_ENABLE_SNMP_TRAPS,,}" == "true" ]; then
         update_config_var $ZBX_CONFIG "SNMPTrapperFile" "${ZABBIX_USER_HOME_DIR}/snmptraps/snmptraps.log"
         update_config_var $ZBX_CONFIG "StartSNMPTrapper" "1"
     else
diff --git a/proxy-sqlite3/ubuntu/docker-entrypoint.sh b/proxy-sqlite3/ubuntu/docker-entrypoint.sh
index f42a19189..ae3bf72f4 100755
--- a/proxy-sqlite3/ubuntu/docker-entrypoint.sh
+++ b/proxy-sqlite3/ubuntu/docker-entrypoint.sh
@@ -5,7 +5,7 @@ set -o pipefail
 set +e
 
 # Script trace mode
-if [ "${DEBUG_MODE}" == "true" ]; then
+if [ "${DEBUG_MODE,,}" == "true" ]; then
     set -o xtrace
 fi
 
@@ -158,7 +158,7 @@ update_zbx_config() {
     update_config_var $ZBX_CONFIG "StartHTTPPollers" "${ZBX_STARTHTTPPOLLERS}"
 
     : ${ZBX_JAVAGATEWAY_ENABLE:="false"}
-    if [ "${ZBX_JAVAGATEWAY_ENABLE}" == "true" ]; then
+    if [ "${ZBX_JAVAGATEWAY_ENABLE,,}" == "true" ]; then
         update_config_var $ZBX_CONFIG "JavaGateway" "${ZBX_JAVAGATEWAY:-"zabbix-java-gateway"}"
         update_config_var $ZBX_CONFIG "JavaGatewayPort" "${ZBX_JAVAGATEWAYPORT}"
         update_config_var $ZBX_CONFIG "StartJavaPollers" "${ZBX_STARTJAVAPOLLERS:-"5"}"
@@ -175,7 +175,7 @@ update_zbx_config() {
     update_config_var $ZBX_CONFIG "VMwareTimeout" "${ZBX_VMWARETIMEOUT}"
 
     : ${ZBX_ENABLE_SNMP_TRAPS:="false"}
-    if [ "${ZBX_ENABLE_SNMP_TRAPS}" == "true" ]; then
+    if [ "${ZBX_ENABLE_SNMP_TRAPS,,}" == "true" ]; then
         update_config_var $ZBX_CONFIG "SNMPTrapperFile" "${ZABBIX_USER_HOME_DIR}/snmptraps/snmptraps.log"
         update_config_var $ZBX_CONFIG "StartSNMPTrapper" "1"
     else
diff --git a/server-mysql/alpine/docker-entrypoint.sh b/server-mysql/alpine/docker-entrypoint.sh
index 446b37b89..6db086bca 100755
--- a/server-mysql/alpine/docker-entrypoint.sh
+++ b/server-mysql/alpine/docker-entrypoint.sh
@@ -5,7 +5,7 @@ set -o pipefail
 set +e
 
 # Script trace mode
-if [ "${DEBUG_MODE}" == "true" ]; then
+if [ "${DEBUG_MODE,,}" == "true" ]; then
     set -o xtrace
 fi
 
@@ -145,17 +145,17 @@ check_variables_mysql() {
 
     file_env MYSQL_ROOT_PASSWORD
 
-    if [ ! -n "${MYSQL_USER}" ] && [ "${MYSQL_RANDOM_ROOT_PASSWORD}" == "true" ]; then
+    if [ ! -n "${MYSQL_USER}" ] && [ "${MYSQL_RANDOM_ROOT_PASSWORD,,}" == "true" ]; then
         echo "**** Impossible to use MySQL server because of unknown Zabbix user and random 'root' password"
         exit 1
     fi
 
-    if [ ! -n "${MYSQL_USER}" ] && [ ! -n "${MYSQL_ROOT_PASSWORD}" ] && [ "${MYSQL_ALLOW_EMPTY_PASSWORD}" != "true" ]; then
+    if [ ! -n "${MYSQL_USER}" ] && [ ! -n "${MYSQL_ROOT_PASSWORD}" ] && [ "${MYSQL_ALLOW_EMPTY_PASSWORD,,}" != "true" ]; then
         echo "*** Impossible to use MySQL server because 'root' password is not defined and it is not empty"
         exit 1
     fi
 
-    if [ "${MYSQL_ALLOW_EMPTY_PASSWORD}" == "true" ] || [ -n "${MYSQL_ROOT_PASSWORD}" ]; then
+    if [ "${MYSQL_ALLOW_EMPTY_PASSWORD,,}" == "true" ] || [ -n "${MYSQL_ROOT_PASSWORD}" ]; then
         USE_DB_ROOT_USER=true
         DB_SERVER_ROOT_USER="root"
         DB_SERVER_ROOT_PASS=${MYSQL_ROOT_PASSWORD:-""}
@@ -165,7 +165,7 @@ check_variables_mysql() {
 
     # If root password is not specified use provided credentials
     : ${DB_SERVER_ROOT_USER:=${MYSQL_USER}}
-    [ "${MYSQL_ALLOW_EMPTY_PASSWORD}" == "true" ] || DB_SERVER_ROOT_PASS=${DB_SERVER_ROOT_PASS:-${MYSQL_PASSWORD}}
+    [ "${MYSQL_ALLOW_EMPTY_PASSWORD,,}" == "true" ] || DB_SERVER_ROOT_PASS=${DB_SERVER_ROOT_PASS:-${MYSQL_PASSWORD}}
     DB_SERVER_ZBX_USER=${MYSQL_USER:-"zabbix"}
     DB_SERVER_ZBX_PASS=${MYSQL_PASSWORD:-"zabbix"}
 
@@ -177,7 +177,7 @@ check_db_connect_mysql() {
     echo "* DB_SERVER_HOST: ${DB_SERVER_HOST}"
     echo "* DB_SERVER_PORT: ${DB_SERVER_PORT}"
     echo "* DB_SERVER_DBNAME: ${DB_SERVER_DBNAME}"
-    if [ "${DEBUG_MODE}" == "true" ]; then
+    if [ "${DEBUG_MODE,,}" == "true" ]; then
         if [ "${USE_DB_ROOT_USER}" == "true" ]; then
             echo "* DB_SERVER_ROOT_USER: ${DB_SERVER_ROOT_USER}"
             echo "* DB_SERVER_ROOT_PASS: ${DB_SERVER_ROOT_PASS}"
@@ -302,7 +302,7 @@ update_zbx_config() {
     update_config_var $ZBX_CONFIG "StartEscalators" "${ZBX_STARTESCALATORS}"
 
     : ${ZBX_JAVAGATEWAY_ENABLE:="false"}
-    if [ "${ZBX_JAVAGATEWAY_ENABLE}" == "true" ]; then
+    if [ "${ZBX_JAVAGATEWAY_ENABLE,,}" == "true" ]; then
         update_config_var $ZBX_CONFIG "JavaGateway" "${ZBX_JAVAGATEWAY:-"zabbix-java-gateway"}"
         update_config_var $ZBX_CONFIG "JavaGatewayPort" "${ZBX_JAVAGATEWAYPORT}"
         update_config_var $ZBX_CONFIG "StartJavaPollers" "${ZBX_STARTJAVAPOLLERS:-"5"}"
@@ -319,7 +319,7 @@ update_zbx_config() {
     update_config_var $ZBX_CONFIG "VMwareTimeout" "${ZBX_VMWARETIMEOUT}"
 
     : ${ZBX_ENABLE_SNMP_TRAPS:="false"}
-    if [ "${ZBX_ENABLE_SNMP_TRAPS}" == "true" ]; then
+    if [ "${ZBX_ENABLE_SNMP_TRAPS,,}" == "true" ]; then
         update_config_var $ZBX_CONFIG "SNMPTrapperFile" "${ZABBIX_USER_HOME_DIR}/snmptraps/snmptraps.log"
         update_config_var $ZBX_CONFIG "StartSNMPTrapper" "1"
     else
diff --git a/server-mysql/centos/docker-entrypoint.sh b/server-mysql/centos/docker-entrypoint.sh
index 446b37b89..6db086bca 100755
--- a/server-mysql/centos/docker-entrypoint.sh
+++ b/server-mysql/centos/docker-entrypoint.sh
@@ -5,7 +5,7 @@ set -o pipefail
 set +e
 
 # Script trace mode
-if [ "${DEBUG_MODE}" == "true" ]; then
+if [ "${DEBUG_MODE,,}" == "true" ]; then
     set -o xtrace
 fi
 
@@ -145,17 +145,17 @@ check_variables_mysql() {
 
     file_env MYSQL_ROOT_PASSWORD
 
-    if [ ! -n "${MYSQL_USER}" ] && [ "${MYSQL_RANDOM_ROOT_PASSWORD}" == "true" ]; then
+    if [ ! -n "${MYSQL_USER}" ] && [ "${MYSQL_RANDOM_ROOT_PASSWORD,,}" == "true" ]; then
         echo "**** Impossible to use MySQL server because of unknown Zabbix user and random 'root' password"
         exit 1
     fi
 
-    if [ ! -n "${MYSQL_USER}" ] && [ ! -n "${MYSQL_ROOT_PASSWORD}" ] && [ "${MYSQL_ALLOW_EMPTY_PASSWORD}" != "true" ]; then
+    if [ ! -n "${MYSQL_USER}" ] && [ ! -n "${MYSQL_ROOT_PASSWORD}" ] && [ "${MYSQL_ALLOW_EMPTY_PASSWORD,,}" != "true" ]; then
         echo "*** Impossible to use MySQL server because 'root' password is not defined and it is not empty"
         exit 1
     fi
 
-    if [ "${MYSQL_ALLOW_EMPTY_PASSWORD}" == "true" ] || [ -n "${MYSQL_ROOT_PASSWORD}" ]; then
+    if [ "${MYSQL_ALLOW_EMPTY_PASSWORD,,}" == "true" ] || [ -n "${MYSQL_ROOT_PASSWORD}" ]; then
         USE_DB_ROOT_USER=true
         DB_SERVER_ROOT_USER="root"
         DB_SERVER_ROOT_PASS=${MYSQL_ROOT_PASSWORD:-""}
@@ -165,7 +165,7 @@ check_variables_mysql() {
 
     # If root password is not specified use provided credentials
     : ${DB_SERVER_ROOT_USER:=${MYSQL_USER}}
-    [ "${MYSQL_ALLOW_EMPTY_PASSWORD}" == "true" ] || DB_SERVER_ROOT_PASS=${DB_SERVER_ROOT_PASS:-${MYSQL_PASSWORD}}
+    [ "${MYSQL_ALLOW_EMPTY_PASSWORD,,}" == "true" ] || DB_SERVER_ROOT_PASS=${DB_SERVER_ROOT_PASS:-${MYSQL_PASSWORD}}
     DB_SERVER_ZBX_USER=${MYSQL_USER:-"zabbix"}
     DB_SERVER_ZBX_PASS=${MYSQL_PASSWORD:-"zabbix"}
 
@@ -177,7 +177,7 @@ check_db_connect_mysql() {
     echo "* DB_SERVER_HOST: ${DB_SERVER_HOST}"
     echo "* DB_SERVER_PORT: ${DB_SERVER_PORT}"
     echo "* DB_SERVER_DBNAME: ${DB_SERVER_DBNAME}"
-    if [ "${DEBUG_MODE}" == "true" ]; then
+    if [ "${DEBUG_MODE,,}" == "true" ]; then
         if [ "${USE_DB_ROOT_USER}" == "true" ]; then
             echo "* DB_SERVER_ROOT_USER: ${DB_SERVER_ROOT_USER}"
             echo "* DB_SERVER_ROOT_PASS: ${DB_SERVER_ROOT_PASS}"
@@ -302,7 +302,7 @@ update_zbx_config() {
     update_config_var $ZBX_CONFIG "StartEscalators" "${ZBX_STARTESCALATORS}"
 
     : ${ZBX_JAVAGATEWAY_ENABLE:="false"}
-    if [ "${ZBX_JAVAGATEWAY_ENABLE}" == "true" ]; then
+    if [ "${ZBX_JAVAGATEWAY_ENABLE,,}" == "true" ]; then
         update_config_var $ZBX_CONFIG "JavaGateway" "${ZBX_JAVAGATEWAY:-"zabbix-java-gateway"}"
         update_config_var $ZBX_CONFIG "JavaGatewayPort" "${ZBX_JAVAGATEWAYPORT}"
         update_config_var $ZBX_CONFIG "StartJavaPollers" "${ZBX_STARTJAVAPOLLERS:-"5"}"
@@ -319,7 +319,7 @@ update_zbx_config() {
     update_config_var $ZBX_CONFIG "VMwareTimeout" "${ZBX_VMWARETIMEOUT}"
 
     : ${ZBX_ENABLE_SNMP_TRAPS:="false"}
-    if [ "${ZBX_ENABLE_SNMP_TRAPS}" == "true" ]; then
+    if [ "${ZBX_ENABLE_SNMP_TRAPS,,}" == "true" ]; then
         update_config_var $ZBX_CONFIG "SNMPTrapperFile" "${ZABBIX_USER_HOME_DIR}/snmptraps/snmptraps.log"
         update_config_var $ZBX_CONFIG "StartSNMPTrapper" "1"
     else
diff --git a/server-mysql/ubuntu/docker-entrypoint.sh b/server-mysql/ubuntu/docker-entrypoint.sh
index 1595dd37b..34d455680 100755
--- a/server-mysql/ubuntu/docker-entrypoint.sh
+++ b/server-mysql/ubuntu/docker-entrypoint.sh
@@ -5,7 +5,7 @@ set -o pipefail
 set +e
 
 # Script trace mode
-if [ "${DEBUG_MODE}" == "true" ]; then
+if [ "${DEBUG_MODE,,}" == "true" ]; then
     set -o xtrace
 fi
 
@@ -145,17 +145,17 @@ check_variables_mysql() {
 
     file_env MYSQL_ROOT_PASSWORD
 
-    if [ ! -n "${MYSQL_USER}" ] && [ "${MYSQL_RANDOM_ROOT_PASSWORD}" == "true" ]; then
+    if [ ! -n "${MYSQL_USER}" ] && [ "${MYSQL_RANDOM_ROOT_PASSWORD,,}" == "true" ]; then
         echo "**** Impossible to use MySQL server because of unknown Zabbix user and random 'root' password"
         exit 1
     fi
 
-    if [ ! -n "${MYSQL_USER}" ] && [ ! -n "${MYSQL_ROOT_PASSWORD}" ] && [ "${MYSQL_ALLOW_EMPTY_PASSWORD}" != "true" ]; then
+    if [ ! -n "${MYSQL_USER}" ] && [ ! -n "${MYSQL_ROOT_PASSWORD}" ] && [ "${MYSQL_ALLOW_EMPTY_PASSWORD,,}" != "true" ]; then
         echo "*** Impossible to use MySQL server because 'root' password is not defined and it is not empty"
         exit 1
     fi
 
-    if [ "${MYSQL_ALLOW_EMPTY_PASSWORD}" == "true" ] || [ -n "${MYSQL_ROOT_PASSWORD}" ]; then
+    if [ "${MYSQL_ALLOW_EMPTY_PASSWORD,,}" == "true" ] || [ -n "${MYSQL_ROOT_PASSWORD}" ]; then
         USE_DB_ROOT_USER=true
         DB_SERVER_ROOT_USER="root"
         DB_SERVER_ROOT_PASS=${MYSQL_ROOT_PASSWORD:-""}
@@ -165,7 +165,7 @@ check_variables_mysql() {
 
     # If root password is not specified use provided credentials
     : ${DB_SERVER_ROOT_USER:=${MYSQL_USER}}
-    [ "${MYSQL_ALLOW_EMPTY_PASSWORD}" == "true" ] || DB_SERVER_ROOT_PASS=${DB_SERVER_ROOT_PASS:-${MYSQL_PASSWORD}}
+    [ "${MYSQL_ALLOW_EMPTY_PASSWORD,,}" == "true" ] || DB_SERVER_ROOT_PASS=${DB_SERVER_ROOT_PASS:-${MYSQL_PASSWORD}}
     DB_SERVER_ZBX_USER=${MYSQL_USER:-"zabbix"}
     DB_SERVER_ZBX_PASS=${MYSQL_PASSWORD:-"zabbix"}
 
@@ -177,7 +177,7 @@ check_db_connect_mysql() {
     echo "* DB_SERVER_HOST: ${DB_SERVER_HOST}"
     echo "* DB_SERVER_PORT: ${DB_SERVER_PORT}"
     echo "* DB_SERVER_DBNAME: ${DB_SERVER_DBNAME}"
-    if [ "${DEBUG_MODE}" == "true" ]; then
+    if [ "${DEBUG_MODE,,}" == "true" ]; then
         if [ "${USE_DB_ROOT_USER}" == "true" ]; then
             echo "* DB_SERVER_ROOT_USER: ${DB_SERVER_ROOT_USER}"
             echo "* DB_SERVER_ROOT_PASS: ${DB_SERVER_ROOT_PASS}"
@@ -302,7 +302,7 @@ update_zbx_config() {
     update_config_var $ZBX_CONFIG "StartEscalators" "${ZBX_STARTESCALATORS}"
 
     : ${ZBX_JAVAGATEWAY_ENABLE:="false"}
-    if [ "${ZBX_JAVAGATEWAY_ENABLE}" == "true" ]; then
+    if [ "${ZBX_JAVAGATEWAY_ENABLE,,}" == "true" ]; then
         update_config_var $ZBX_CONFIG "JavaGateway" "${ZBX_JAVAGATEWAY:-"zabbix-java-gateway"}"
         update_config_var $ZBX_CONFIG "JavaGatewayPort" "${ZBX_JAVAGATEWAYPORT}"
         update_config_var $ZBX_CONFIG "StartJavaPollers" "${ZBX_STARTJAVAPOLLERS:-"5"}"
@@ -319,7 +319,7 @@ update_zbx_config() {
     update_config_var $ZBX_CONFIG "VMwareTimeout" "${ZBX_VMWARETIMEOUT}"
 
     : ${ZBX_ENABLE_SNMP_TRAPS:="false"}
-    if [ "${ZBX_ENABLE_SNMP_TRAPS}" == "true" ]; then
+    if [ "${ZBX_ENABLE_SNMP_TRAPS,,}" == "true" ]; then
         update_config_var $ZBX_CONFIG "SNMPTrapperFile" "${ZABBIX_USER_HOME_DIR}/snmptraps/snmptraps.log"
         update_config_var $ZBX_CONFIG "StartSNMPTrapper" "1"
     else
diff --git a/server-pgsql/alpine/docker-entrypoint.sh b/server-pgsql/alpine/docker-entrypoint.sh
index eb075cd05..b15aa17e7 100755
--- a/server-pgsql/alpine/docker-entrypoint.sh
+++ b/server-pgsql/alpine/docker-entrypoint.sh
@@ -5,7 +5,7 @@ set -o pipefail
 set +e
 
 # Script trace mode
-if [ "${DEBUG_MODE}" == "true" ]; then
+if [ "${DEBUG_MODE,,}" == "true" ]; then
     set -o xtrace
 fi
 
@@ -159,7 +159,7 @@ check_db_connect_postgresql() {
     echo "* DB_SERVER_PORT: ${DB_SERVER_PORT}"
     echo "* DB_SERVER_DBNAME: ${DB_SERVER_DBNAME}"
     echo "* DB_SERVER_SCHEMA: ${DB_SERVER_SCHEMA}"
-    if [ "${DEBUG_MODE}" == "true" ]; then
+    if [ "${DEBUG_MODE,,}" == "true" ]; then
         echo "* DB_SERVER_ZBX_USER: ${DB_SERVER_ZBX_USER}"
         echo "* DB_SERVER_ZBX_PASS: ${DB_SERVER_ZBX_PASS}"
     fi
@@ -310,7 +310,7 @@ update_zbx_config() {
     update_config_var $ZBX_CONFIG "StartEscalators" "${ZBX_STARTESCALATORS}"
 
     : ${ZBX_JAVAGATEWAY_ENABLE:="false"}
-    if [ "${ZBX_JAVAGATEWAY_ENABLE}" == "true" ]; then
+    if [ "${ZBX_JAVAGATEWAY_ENABLE,,}" == "true" ]; then
         update_config_var $ZBX_CONFIG "JavaGateway" "${ZBX_JAVAGATEWAY:-"zabbix-java-gateway"}"
         update_config_var $ZBX_CONFIG "JavaGatewayPort" "${ZBX_JAVAGATEWAYPORT}"
         update_config_var $ZBX_CONFIG "StartJavaPollers" "${ZBX_STARTJAVAPOLLERS:-"5"}"
@@ -327,7 +327,7 @@ update_zbx_config() {
     update_config_var $ZBX_CONFIG "VMwareTimeout" "${ZBX_VMWARETIMEOUT}"
 
     : ${ZBX_ENABLE_SNMP_TRAPS:="false"}
-    if [ "${ZBX_ENABLE_SNMP_TRAPS}" == "true" ]; then
+    if [ "${ZBX_ENABLE_SNMP_TRAPS,,}" == "true" ]; then
         update_config_var $ZBX_CONFIG "SNMPTrapperFile" "${ZABBIX_USER_HOME_DIR}/snmptraps/snmptraps.log"
         update_config_var $ZBX_CONFIG "StartSNMPTrapper" "1"
     else
diff --git a/server-pgsql/centos/docker-entrypoint.sh b/server-pgsql/centos/docker-entrypoint.sh
index eb075cd05..b15aa17e7 100755
--- a/server-pgsql/centos/docker-entrypoint.sh
+++ b/server-pgsql/centos/docker-entrypoint.sh
@@ -5,7 +5,7 @@ set -o pipefail
 set +e
 
 # Script trace mode
-if [ "${DEBUG_MODE}" == "true" ]; then
+if [ "${DEBUG_MODE,,}" == "true" ]; then
     set -o xtrace
 fi
 
@@ -159,7 +159,7 @@ check_db_connect_postgresql() {
     echo "* DB_SERVER_PORT: ${DB_SERVER_PORT}"
     echo "* DB_SERVER_DBNAME: ${DB_SERVER_DBNAME}"
     echo "* DB_SERVER_SCHEMA: ${DB_SERVER_SCHEMA}"
-    if [ "${DEBUG_MODE}" == "true" ]; then
+    if [ "${DEBUG_MODE,,}" == "true" ]; then
         echo "* DB_SERVER_ZBX_USER: ${DB_SERVER_ZBX_USER}"
         echo "* DB_SERVER_ZBX_PASS: ${DB_SERVER_ZBX_PASS}"
     fi
@@ -310,7 +310,7 @@ update_zbx_config() {
     update_config_var $ZBX_CONFIG "StartEscalators" "${ZBX_STARTESCALATORS}"
 
     : ${ZBX_JAVAGATEWAY_ENABLE:="false"}
-    if [ "${ZBX_JAVAGATEWAY_ENABLE}" == "true" ]; then
+    if [ "${ZBX_JAVAGATEWAY_ENABLE,,}" == "true" ]; then
         update_config_var $ZBX_CONFIG "JavaGateway" "${ZBX_JAVAGATEWAY:-"zabbix-java-gateway"}"
         update_config_var $ZBX_CONFIG "JavaGatewayPort" "${ZBX_JAVAGATEWAYPORT}"
         update_config_var $ZBX_CONFIG "StartJavaPollers" "${ZBX_STARTJAVAPOLLERS:-"5"}"
@@ -327,7 +327,7 @@ update_zbx_config() {
     update_config_var $ZBX_CONFIG "VMwareTimeout" "${ZBX_VMWARETIMEOUT}"
 
     : ${ZBX_ENABLE_SNMP_TRAPS:="false"}
-    if [ "${ZBX_ENABLE_SNMP_TRAPS}" == "true" ]; then
+    if [ "${ZBX_ENABLE_SNMP_TRAPS,,}" == "true" ]; then
         update_config_var $ZBX_CONFIG "SNMPTrapperFile" "${ZABBIX_USER_HOME_DIR}/snmptraps/snmptraps.log"
         update_config_var $ZBX_CONFIG "StartSNMPTrapper" "1"
     else
diff --git a/server-pgsql/ubuntu/docker-entrypoint.sh b/server-pgsql/ubuntu/docker-entrypoint.sh
index 4305bd2c9..37214bebf 100755
--- a/server-pgsql/ubuntu/docker-entrypoint.sh
+++ b/server-pgsql/ubuntu/docker-entrypoint.sh
@@ -5,7 +5,7 @@ set -o pipefail
 set +e
 
 # Script trace mode
-if [ "${DEBUG_MODE}" == "true" ]; then
+if [ "${DEBUG_MODE,,}" == "true" ]; then
     set -o xtrace
 fi
 
@@ -159,7 +159,7 @@ check_db_connect_postgresql() {
     echo "* DB_SERVER_PORT: ${DB_SERVER_PORT}"
     echo "* DB_SERVER_DBNAME: ${DB_SERVER_DBNAME}"
     echo "* DB_SERVER_SCHEMA: ${DB_SERVER_SCHEMA}"
-    if [ "${DEBUG_MODE}" == "true" ]; then
+    if [ "${DEBUG_MODE,,}" == "true" ]; then
         echo "* DB_SERVER_ZBX_USER: ${DB_SERVER_ZBX_USER}"
         echo "* DB_SERVER_ZBX_PASS: ${DB_SERVER_ZBX_PASS}"
     fi
@@ -310,7 +310,7 @@ update_zbx_config() {
     update_config_var $ZBX_CONFIG "StartEscalators" "${ZBX_STARTESCALATORS}"
 
     : ${ZBX_JAVAGATEWAY_ENABLE:="false"}
-    if [ "${ZBX_JAVAGATEWAY_ENABLE}" == "true" ]; then
+    if [ "${ZBX_JAVAGATEWAY_ENABLE,,}" == "true" ]; then
         update_config_var $ZBX_CONFIG "JavaGateway" "${ZBX_JAVAGATEWAY:-"zabbix-java-gateway"}"
         update_config_var $ZBX_CONFIG "JavaGatewayPort" "${ZBX_JAVAGATEWAYPORT}"
         update_config_var $ZBX_CONFIG "StartJavaPollers" "${ZBX_STARTJAVAPOLLERS:-"5"}"
@@ -327,7 +327,7 @@ update_zbx_config() {
     update_config_var $ZBX_CONFIG "VMwareTimeout" "${ZBX_VMWARETIMEOUT}"
 
     : ${ZBX_ENABLE_SNMP_TRAPS:="false"}
-    if [ "${ZBX_ENABLE_SNMP_TRAPS}" == "true" ]; then
+    if [ "${ZBX_ENABLE_SNMP_TRAPS,,}" == "true" ]; then
         update_config_var $ZBX_CONFIG "SNMPTrapperFile" "${ZABBIX_USER_HOME_DIR}/snmptraps/snmptraps.log"
         update_config_var $ZBX_CONFIG "StartSNMPTrapper" "1"
     else
diff --git a/web-apache-mysql/alpine/docker-entrypoint.sh b/web-apache-mysql/alpine/docker-entrypoint.sh
index 72aba5578..9a756f51c 100755
--- a/web-apache-mysql/alpine/docker-entrypoint.sh
+++ b/web-apache-mysql/alpine/docker-entrypoint.sh
@@ -5,7 +5,7 @@ set -o pipefail
 set +e
 
 # Script trace mode
-if [ "${DEBUG_MODE}" == "true" ]; then
+if [ "${DEBUG_MODE,,}" == "true" ]; then
     set -o xtrace
 fi
 
@@ -66,17 +66,17 @@ check_variables() {
     file_env MYSQL_USER
     file_env MYSQL_PASSWORD
 
-    if [ ! -n "${MYSQL_USER}" ] && [ "${MYSQL_RANDOM_ROOT_PASSWORD}" == "true" ]; then
+    if [ ! -n "${MYSQL_USER}" ] && [ "${MYSQL_RANDOM_ROOT_PASSWORD,,}" == "true" ]; then
         echo "**** Impossible to use MySQL server because of unknown Zabbix user and random 'root' password"
         exit 1
     fi
 
-    if [ ! -n "${MYSQL_USER}" ] && [ ! -n "${MYSQL_ROOT_PASSWORD}" ] && [ "${MYSQL_ALLOW_EMPTY_PASSWORD}" != "true" ]; then
+    if [ ! -n "${MYSQL_USER}" ] && [ ! -n "${MYSQL_ROOT_PASSWORD}" ] && [ "${MYSQL_ALLOW_EMPTY_PASSWORD,,}" != "true" ]; then
         echo "*** Impossible to use MySQL server because 'root' password is not defined and it is not empty"
         exit 1
     fi
 
-    if [ "${MYSQL_ALLOW_EMPTY_PASSWORD}" == "true" ] || [ -n "${MYSQL_ROOT_PASSWORD}" ]; then
+    if [ "${MYSQL_ALLOW_EMPTY_PASSWORD,,}" == "true" ] || [ -n "${MYSQL_ROOT_PASSWORD}" ]; then
         USE_DB_ROOT_USER=true
         DB_SERVER_ROOT_USER="root"
         DB_SERVER_ROOT_PASS=${MYSQL_ROOT_PASSWORD:-""}
@@ -86,7 +86,7 @@ check_variables() {
 
     # If root password is not specified use provided credentials
     : ${DB_SERVER_ROOT_USER:=${MYSQL_USER}}
-    [ "${MYSQL_ALLOW_EMPTY_PASSWORD}" == "true" ] || DB_SERVER_ROOT_PASS=${DB_SERVER_ROOT_PASS:-${MYSQL_PASSWORD}}
+    [ "${MYSQL_ALLOW_EMPTY_PASSWORD,,}" == "true" ] || DB_SERVER_ROOT_PASS=${DB_SERVER_ROOT_PASS:-${MYSQL_PASSWORD}}
     DB_SERVER_ZBX_USER=${MYSQL_USER:-"zabbix"}
     DB_SERVER_ZBX_PASS=${MYSQL_PASSWORD:-"zabbix"}
 
@@ -98,7 +98,7 @@ check_db_connect() {
     echo "* DB_SERVER_HOST: ${DB_SERVER_HOST}"
     echo "* DB_SERVER_PORT: ${DB_SERVER_PORT}"
     echo "* DB_SERVER_DBNAME: ${DB_SERVER_DBNAME}"
-    if [ "${DEBUG_MODE}" == "true" ]; then
+    if [ "${DEBUG_MODE,,}" == "true" ]; then
         if [ "${USE_DB_ROOT_USER}" == "true" ]; then
             echo "* DB_SERVER_ROOT_USER: ${DB_SERVER_ROOT_USER}"
             echo "* DB_SERVER_ROOT_PASS: ${DB_SERVER_ROOT_PASS}"
@@ -168,7 +168,9 @@ prepare_zbx_web_config() {
     export ZBX_SERVER_PORT=${ZBX_SERVER_PORT:-"10051"}
     export ZBX_SERVER_NAME=${ZBX_SERVER_NAME}
 
-    if [ "${ENABLE_WEB_ACCESS_LOG:-"true"}" == "false" ]; then
+    ENABLE_WEB_ACCESS_LOG=${ENABLE_WEB_ACCESS_LOG:-"true"}
+
+    if [ "${ENABLE_WEB_ACCESS_LOG,,}" == "false" ]; then
         sed -ri \
             -e 's!^(\s*CustomLog)\s+\S+!\1 /dev/null!g' \
             "/etc/apache2/httpd.conf"
diff --git a/web-apache-mysql/centos/docker-entrypoint.sh b/web-apache-mysql/centos/docker-entrypoint.sh
index 94612251f..5ff556d2d 100755
--- a/web-apache-mysql/centos/docker-entrypoint.sh
+++ b/web-apache-mysql/centos/docker-entrypoint.sh
@@ -5,7 +5,7 @@ set -o pipefail
 set +e
 
 # Script trace mode
-if [ "${DEBUG_MODE}" == "true" ]; then
+if [ "${DEBUG_MODE,,}" == "true" ]; then
     set -o xtrace
 fi
 
@@ -66,17 +66,17 @@ check_variables() {
     file_env MYSQL_USER
     file_env MYSQL_PASSWORD
 
-    if [ ! -n "${MYSQL_USER}" ] && [ "${MYSQL_RANDOM_ROOT_PASSWORD}" == "true" ]; then
+    if [ ! -n "${MYSQL_USER}" ] && [ "${MYSQL_RANDOM_ROOT_PASSWORD,,}" == "true" ]; then
         echo "**** Impossible to use MySQL server because of unknown Zabbix user and random 'root' password"
         exit 1
     fi
 
-    if [ ! -n "${MYSQL_USER}" ] && [ ! -n "${MYSQL_ROOT_PASSWORD}" ] && [ "${MYSQL_ALLOW_EMPTY_PASSWORD}" != "true" ]; then
+    if [ ! -n "${MYSQL_USER}" ] && [ ! -n "${MYSQL_ROOT_PASSWORD}" ] && [ "${MYSQL_ALLOW_EMPTY_PASSWORD,,}" != "true" ]; then
         echo "*** Impossible to use MySQL server because 'root' password is not defined and it is not empty"
         exit 1
     fi
 
-    if [ "${MYSQL_ALLOW_EMPTY_PASSWORD}" == "true" ] || [ -n "${MYSQL_ROOT_PASSWORD}" ]; then
+    if [ "${MYSQL_ALLOW_EMPTY_PASSWORD,,}" == "true" ] || [ -n "${MYSQL_ROOT_PASSWORD}" ]; then
         USE_DB_ROOT_USER=true
         DB_SERVER_ROOT_USER="root"
         DB_SERVER_ROOT_PASS=${MYSQL_ROOT_PASSWORD:-""}
@@ -86,7 +86,7 @@ check_variables() {
 
     # If root password is not specified use provided credentials
     : ${DB_SERVER_ROOT_USER:=${MYSQL_USER}}
-    [ "${MYSQL_ALLOW_EMPTY_PASSWORD}" == "true" ] || DB_SERVER_ROOT_PASS=${DB_SERVER_ROOT_PASS:-${MYSQL_PASSWORD}}
+    [ "${MYSQL_ALLOW_EMPTY_PASSWORD,,}" == "true" ] || DB_SERVER_ROOT_PASS=${DB_SERVER_ROOT_PASS:-${MYSQL_PASSWORD}}
     DB_SERVER_ZBX_USER=${MYSQL_USER:-"zabbix"}
     DB_SERVER_ZBX_PASS=${MYSQL_PASSWORD:-"zabbix"}
 
@@ -98,7 +98,7 @@ check_db_connect() {
     echo "* DB_SERVER_HOST: ${DB_SERVER_HOST}"
     echo "* DB_SERVER_PORT: ${DB_SERVER_PORT}"
     echo "* DB_SERVER_DBNAME: ${DB_SERVER_DBNAME}"
-    if [ "${DEBUG_MODE}" == "true" ]; then
+    if [ "${DEBUG_MODE,,}" == "true" ]; then
         if [ "${USE_DB_ROOT_USER}" == "true" ]; then
             echo "* DB_SERVER_ROOT_USER: ${DB_SERVER_ROOT_USER}"
             echo "* DB_SERVER_ROOT_PASS: ${DB_SERVER_ROOT_PASS}"
@@ -168,7 +168,9 @@ prepare_zbx_web_config() {
     export ZBX_SERVER_PORT=${ZBX_SERVER_PORT:-"10051"}
     export ZBX_SERVER_NAME=${ZBX_SERVER_NAME}
 
-    if [ "${ENABLE_WEB_ACCESS_LOG:-"true"}" == "false" ]; then
+    ENABLE_WEB_ACCESS_LOG=${ENABLE_WEB_ACCESS_LOG:-"true"}
+
+    if [ "${ENABLE_WEB_ACCESS_LOG,,}" == "false" ]; then
         sed -ri \
             -e 's!^(\s*CustomLog)\s+\S+!\1 /dev/null!g' \
             "/etc/httpd/conf/httpd.conf"
diff --git a/web-apache-mysql/ubuntu/docker-entrypoint.sh b/web-apache-mysql/ubuntu/docker-entrypoint.sh
index cf7b4d8f8..b42a664ca 100755
--- a/web-apache-mysql/ubuntu/docker-entrypoint.sh
+++ b/web-apache-mysql/ubuntu/docker-entrypoint.sh
@@ -5,7 +5,7 @@ set -o pipefail
 set +e
 
 # Script trace mode
-if [ "${DEBUG_MODE}" == "true" ]; then
+if [ "${DEBUG_MODE,,}" == "true" ]; then
     set -o xtrace
 fi
 
@@ -66,17 +66,17 @@ check_variables() {
     file_env MYSQL_USER
     file_env MYSQL_PASSWORD
 
-    if [ ! -n "${MYSQL_USER}" ] && [ "${MYSQL_RANDOM_ROOT_PASSWORD}" == "true" ]; then
+    if [ ! -n "${MYSQL_USER}" ] && [ "${MYSQL_RANDOM_ROOT_PASSWORD,,}" == "true" ]; then
         echo "**** Impossible to use MySQL server because of unknown Zabbix user and random 'root' password"
         exit 1
     fi
 
-    if [ ! -n "${MYSQL_USER}" ] && [ ! -n "${MYSQL_ROOT_PASSWORD}" ] && [ "${MYSQL_ALLOW_EMPTY_PASSWORD}" != "true" ]; then
+    if [ ! -n "${MYSQL_USER}" ] && [ ! -n "${MYSQL_ROOT_PASSWORD}" ] && [ "${MYSQL_ALLOW_EMPTY_PASSWORD,,}" != "true" ]; then
         echo "*** Impossible to use MySQL server because 'root' password is not defined and it is not empty"
         exit 1
     fi
 
-    if [ "${MYSQL_ALLOW_EMPTY_PASSWORD}" == "true" ] || [ -n "${MYSQL_ROOT_PASSWORD}" ]; then
+    if [ "${MYSQL_ALLOW_EMPTY_PASSWORD,,}" == "true" ] || [ -n "${MYSQL_ROOT_PASSWORD}" ]; then
         USE_DB_ROOT_USER=true
         DB_SERVER_ROOT_USER="root"
         DB_SERVER_ROOT_PASS=${MYSQL_ROOT_PASSWORD:-""}
@@ -86,7 +86,7 @@ check_variables() {
 
     # If root password is not specified use provided credentials
     : ${DB_SERVER_ROOT_USER:=${MYSQL_USER}}
-    [ "${MYSQL_ALLOW_EMPTY_PASSWORD}" == "true" ] || DB_SERVER_ROOT_PASS=${DB_SERVER_ROOT_PASS:-${MYSQL_PASSWORD}}
+    [ "${MYSQL_ALLOW_EMPTY_PASSWORD,,}" == "true" ] || DB_SERVER_ROOT_PASS=${DB_SERVER_ROOT_PASS:-${MYSQL_PASSWORD}}
     DB_SERVER_ZBX_USER=${MYSQL_USER:-"zabbix"}
     DB_SERVER_ZBX_PASS=${MYSQL_PASSWORD:-"zabbix"}
 
@@ -98,7 +98,7 @@ check_db_connect() {
     echo "* DB_SERVER_HOST: ${DB_SERVER_HOST}"
     echo "* DB_SERVER_PORT: ${DB_SERVER_PORT}"
     echo "* DB_SERVER_DBNAME: ${DB_SERVER_DBNAME}"
-    if [ "${DEBUG_MODE}" == "true" ]; then
+    if [ "${DEBUG_MODE,,}" == "true" ]; then
         if [ "${USE_DB_ROOT_USER}" == "true" ]; then
             echo "* DB_SERVER_ROOT_USER: ${DB_SERVER_ROOT_USER}"
             echo "* DB_SERVER_ROOT_PASS: ${DB_SERVER_ROOT_PASS}"
@@ -168,7 +168,9 @@ prepare_zbx_web_config() {
     export ZBX_SERVER_PORT=${ZBX_SERVER_PORT:-"10051"}
     export ZBX_SERVER_NAME=${ZBX_SERVER_NAME}
 
-    if [ "${ENABLE_WEB_ACCESS_LOG:-"true"}" == "false" ]; then
+    ENABLE_WEB_ACCESS_LOG=${ENABLE_WEB_ACCESS_LOG:-"true"}
+
+    if [ "${ENABLE_WEB_ACCESS_LOG,,}" == "false" ]; then
         sed -ri \
             -e 's!^(\s*CustomLog)\s+\S+!\1 /dev/null!g' \
             "/etc/apache2/apache2.conf"
diff --git a/web-apache-pgsql/alpine/docker-entrypoint.sh b/web-apache-pgsql/alpine/docker-entrypoint.sh
index 16297630c..b0d793525 100755
--- a/web-apache-pgsql/alpine/docker-entrypoint.sh
+++ b/web-apache-pgsql/alpine/docker-entrypoint.sh
@@ -5,7 +5,7 @@ set -o pipefail
 set +e
 
 # Script trace mode
-if [ "${DEBUG_MODE}" == "true" ]; then
+if [ "${DEBUG_MODE,,}" == "true" ]; then
     set -o xtrace
 fi
 
@@ -83,7 +83,7 @@ check_db_connect() {
     echo "* DB_SERVER_PORT: ${DB_SERVER_PORT}"
     echo "* DB_SERVER_DBNAME: ${DB_SERVER_DBNAME}"
     echo "* DB_SERVER_SCHEMA: ${DB_SERVER_SCHEMA}"
-    if [ "${DEBUG_MODE}" == "true" ]; then
+    if [ "${DEBUG_MODE,,}" == "true" ]; then
         if [ "${USE_DB_ROOT_USER}" == "true" ]; then
             echo "* DB_SERVER_ROOT_USER: ${DB_SERVER_ROOT_USER}"
             echo "* DB_SERVER_ROOT_PASS: ${DB_SERVER_ROOT_PASS}"
@@ -165,7 +165,9 @@ prepare_zbx_web_config() {
     export ZBX_SERVER_PORT=${ZBX_SERVER_PORT:-"10051"}
     export ZBX_SERVER_NAME=${ZBX_SERVER_NAME}
 
-    if [ "${ENABLE_WEB_ACCESS_LOG:-"true"}" == "false" ]; then
+    ENABLE_WEB_ACCESS_LOG=${ENABLE_WEB_ACCESS_LOG:-"true"}
+
+    if [ "${ENABLE_WEB_ACCESS_LOG,,}" == "false" ]; then
         sed -ri \
             -e 's!^(\s*CustomLog)\s+\S+!\1 /dev/null!g' \
             "/etc/apache2/httpd.conf"
diff --git a/web-apache-pgsql/centos/docker-entrypoint.sh b/web-apache-pgsql/centos/docker-entrypoint.sh
index d924f2ff2..e8eac21b6 100755
--- a/web-apache-pgsql/centos/docker-entrypoint.sh
+++ b/web-apache-pgsql/centos/docker-entrypoint.sh
@@ -5,7 +5,7 @@ set -o pipefail
 set +e
 
 # Script trace mode
-if [ "${DEBUG_MODE}" == "true" ]; then
+if [ "${DEBUG_MODE,,}" == "true" ]; then
     set -o xtrace
 fi
 
@@ -83,7 +83,7 @@ check_db_connect() {
     echo "* DB_SERVER_PORT: ${DB_SERVER_PORT}"
     echo "* DB_SERVER_DBNAME: ${DB_SERVER_DBNAME}"
     echo "* DB_SERVER_SCHEMA: ${DB_SERVER_SCHEMA}"
-    if [ "${DEBUG_MODE}" == "true" ]; then
+    if [ "${DEBUG_MODE,,}" == "true" ]; then
         if [ "${USE_DB_ROOT_USER}" == "true" ]; then
             echo "* DB_SERVER_ROOT_USER: ${DB_SERVER_ROOT_USER}"
             echo "* DB_SERVER_ROOT_PASS: ${DB_SERVER_ROOT_PASS}"
@@ -165,7 +165,9 @@ prepare_zbx_web_config() {
     export ZBX_SERVER_PORT=${ZBX_SERVER_PORT:-"10051"}
     export ZBX_SERVER_NAME=${ZBX_SERVER_NAME}
 
-    if [ "${ENABLE_WEB_ACCESS_LOG:-"true"}" == "false" ]; then
+    ENABLE_WEB_ACCESS_LOG=${ENABLE_WEB_ACCESS_LOG:-"true"}
+
+    if [ "${ENABLE_WEB_ACCESS_LOG,,}" == "false" ]; then
         sed -ri \
             -e 's!^(\s*CustomLog)\s+\S+!\1 /dev/null!g' \
             "/etc/httpd/conf/httpd.conf"
diff --git a/web-apache-pgsql/ubuntu/docker-entrypoint.sh b/web-apache-pgsql/ubuntu/docker-entrypoint.sh
index 10f005e3a..d738a5f3c 100755
--- a/web-apache-pgsql/ubuntu/docker-entrypoint.sh
+++ b/web-apache-pgsql/ubuntu/docker-entrypoint.sh
@@ -5,7 +5,7 @@ set -o pipefail
 set +e
 
 # Script trace mode
-if [ "${DEBUG_MODE}" == "true" ]; then
+if [ "${DEBUG_MODE,,}" == "true" ]; then
     set -o xtrace
 fi
 
@@ -83,7 +83,7 @@ check_db_connect() {
     echo "* DB_SERVER_PORT: ${DB_SERVER_PORT}"
     echo "* DB_SERVER_DBNAME: ${DB_SERVER_DBNAME}"
     echo "* DB_SERVER_SCHEMA: ${DB_SERVER_SCHEMA}"
-    if [ "${DEBUG_MODE}" == "true" ]; then
+    if [ "${DEBUG_MODE,,}" == "true" ]; then
         if [ "${USE_DB_ROOT_USER}" == "true" ]; then
             echo "* DB_SERVER_ROOT_USER: ${DB_SERVER_ROOT_USER}"
             echo "* DB_SERVER_ROOT_PASS: ${DB_SERVER_ROOT_PASS}"
@@ -165,7 +165,9 @@ prepare_zbx_web_config() {
     export ZBX_SERVER_PORT=${ZBX_SERVER_PORT:-"10051"}
     export ZBX_SERVER_NAME=${ZBX_SERVER_NAME}
 
-    if [ "${ENABLE_WEB_ACCESS_LOG:-"true"}" == "false" ]; then
+    ENABLE_WEB_ACCESS_LOG=${ENABLE_WEB_ACCESS_LOG:-"true"}
+
+    if [ "${ENABLE_WEB_ACCESS_LOG,,}" == "false" ]; then
         sed -ri \
             -e 's!^(\s*CustomLog)\s+\S+!\1 /dev/null!g' \
             "/etc/apache2/apache2.conf"
diff --git a/web-nginx-mysql/alpine/docker-entrypoint.sh b/web-nginx-mysql/alpine/docker-entrypoint.sh
index 0c2b8a7e4..d7de2624d 100755
--- a/web-nginx-mysql/alpine/docker-entrypoint.sh
+++ b/web-nginx-mysql/alpine/docker-entrypoint.sh
@@ -5,7 +5,7 @@ set -o pipefail
 set +e
 
 # Script trace mode
-if [ "${DEBUG_MODE}" == "true" ]; then
+if [ "${DEBUG_MODE,,}" == "true" ]; then
     set -o xtrace
 fi
 
@@ -66,17 +66,17 @@ check_variables() {
     file_env MYSQL_USER
     file_env MYSQL_PASSWORD
 
-    if [ ! -n "${MYSQL_USER}" ] && [ "${MYSQL_RANDOM_ROOT_PASSWORD}" == "true" ]; then
+    if [ ! -n "${MYSQL_USER}" ] && [ "${MYSQL_RANDOM_ROOT_PASSWORD,,}" == "true" ]; then
         echo "**** Impossible to use MySQL server because of unknown Zabbix user and random 'root' password"
         exit 1
     fi
 
-    if [ ! -n "${MYSQL_USER}" ] && [ ! -n "${MYSQL_ROOT_PASSWORD}" ] && [ "${MYSQL_ALLOW_EMPTY_PASSWORD}" != "true" ]; then
+    if [ ! -n "${MYSQL_USER}" ] && [ ! -n "${MYSQL_ROOT_PASSWORD}" ] && [ "${MYSQL_ALLOW_EMPTY_PASSWORD,,}" != "true" ]; then
         echo "*** Impossible to use MySQL server because 'root' password is not defined and it is not empty"
         exit 1
     fi
 
-    if [ "${MYSQL_ALLOW_EMPTY_PASSWORD}" == "true" ] || [ -n "${MYSQL_ROOT_PASSWORD}" ]; then
+    if [ "${MYSQL_ALLOW_EMPTY_PASSWORD,,}" == "true" ] || [ -n "${MYSQL_ROOT_PASSWORD}" ]; then
         USE_DB_ROOT_USER=true
         DB_SERVER_ROOT_USER="root"
         DB_SERVER_ROOT_PASS=${MYSQL_ROOT_PASSWORD:-""}
@@ -85,8 +85,8 @@ check_variables() {
     [ -n "${MYSQL_USER}" ] && CREATE_ZBX_DB_USER=true
 
     # If root password is not specified use provided credentials
-    : ${DB_SERVER_ROOT_USER:=${MYSQL_USER}}....
-    [ "${MYSQL_ALLOW_EMPTY_PASSWORD}" == "true" ] || DB_SERVER_ROOT_PASS=${DB_SERVER_ROOT_PASS:-${MYSQL_PASSWORD}}
+    : ${DB_SERVER_ROOT_USER:=${MYSQL_USER}}
+    [ "${MYSQL_ALLOW_EMPTY_PASSWORD,,}" == "true" ] || DB_SERVER_ROOT_PASS=${DB_SERVER_ROOT_PASS:-${MYSQL_PASSWORD}}
     DB_SERVER_ZBX_USER=${MYSQL_USER:-"zabbix"}
     DB_SERVER_ZBX_PASS=${MYSQL_PASSWORD:-"zabbix"}
 
@@ -98,7 +98,7 @@ check_db_connect() {
     echo "* DB_SERVER_HOST: ${DB_SERVER_HOST}"
     echo "* DB_SERVER_PORT: ${DB_SERVER_PORT}"
     echo "* DB_SERVER_DBNAME: ${DB_SERVER_DBNAME}"
-    if [ "${DEBUG_MODE}" == "true" ]; then
+    if [ "${DEBUG_MODE,,}" == "true" ]; then
         if [ "${USE_DB_ROOT_USER}" == "true" ]; then
             echo "* DB_SERVER_ROOT_USER: ${DB_SERVER_ROOT_USER}"
             echo "* DB_SERVER_ROOT_PASS: ${DB_SERVER_ROOT_PASS}"
@@ -189,7 +189,9 @@ prepare_zbx_web_config() {
         "$ZABBIX_ETC_DIR/nginx_ssl.conf"
     fi
 
-    if [ "${ENABLE_WEB_ACCESS_LOG:-"true"}" == "false" ]; then
+    ENABLE_WEB_ACCESS_LOG=${ENABLE_WEB_ACCESS_LOG:-"true"}
+
+    if [ "${ENABLE_WEB_ACCESS_LOG,,}" == "false" ]; then
         sed -ri \
             -e 's!^(\s*access_log).+\;!\1 off\;!g' \
             "/etc/nginx/nginx.conf"
diff --git a/web-nginx-mysql/centos/docker-entrypoint.sh b/web-nginx-mysql/centos/docker-entrypoint.sh
index 962f4f388..bb70db748 100755
--- a/web-nginx-mysql/centos/docker-entrypoint.sh
+++ b/web-nginx-mysql/centos/docker-entrypoint.sh
@@ -5,7 +5,7 @@ set -o pipefail
 set +e
 
 # Script trace mode
-if [ "${DEBUG_MODE}" == "true" ]; then
+if [ "${DEBUG_MODE,,}" == "true" ]; then
     set -o xtrace
 fi
 
@@ -66,17 +66,17 @@ check_variables() {
     file_env MYSQL_USER
     file_env MYSQL_PASSWORD
 
-    if [ ! -n "${MYSQL_USER}" ] && [ "${MYSQL_RANDOM_ROOT_PASSWORD}" == "true" ]; then
+    if [ ! -n "${MYSQL_USER}" ] && [ "${MYSQL_RANDOM_ROOT_PASSWORD,,}" == "true" ]; then
         echo "**** Impossible to use MySQL server because of unknown Zabbix user and random 'root' password"
         exit 1
     fi
 
-    if [ ! -n "${MYSQL_USER}" ] && [ ! -n "${MYSQL_ROOT_PASSWORD}" ] && [ "${MYSQL_ALLOW_EMPTY_PASSWORD}" != "true" ]; then
+    if [ ! -n "${MYSQL_USER}" ] && [ ! -n "${MYSQL_ROOT_PASSWORD}" ] && [ "${MYSQL_ALLOW_EMPTY_PASSWORD,,}" != "true" ]; then
         echo "*** Impossible to use MySQL server because 'root' password is not defined and it is not empty"
         exit 1
     fi
 
-    if [ "${MYSQL_ALLOW_EMPTY_PASSWORD}" == "true" ] || [ -n "${MYSQL_ROOT_PASSWORD}" ]; then
+    if [ "${MYSQL_ALLOW_EMPTY_PASSWORD,,}" == "true" ] || [ -n "${MYSQL_ROOT_PASSWORD}" ]; then
         USE_DB_ROOT_USER=true
         DB_SERVER_ROOT_USER="root"
         DB_SERVER_ROOT_PASS=${MYSQL_ROOT_PASSWORD:-""}
@@ -85,8 +85,8 @@ check_variables() {
     [ -n "${MYSQL_USER}" ] && CREATE_ZBX_DB_USER=true
 
     # If root password is not specified use provided credentials
-    : ${DB_SERVER_ROOT_USER:=${MYSQL_USER}}....
-    [ "${MYSQL_ALLOW_EMPTY_PASSWORD}" == "true" ] || DB_SERVER_ROOT_PASS=${DB_SERVER_ROOT_PASS:-${MYSQL_PASSWORD}}
+    : ${DB_SERVER_ROOT_USER:=${MYSQL_USER}}
+    [ "${MYSQL_ALLOW_EMPTY_PASSWORD,,}" == "true" ] || DB_SERVER_ROOT_PASS=${DB_SERVER_ROOT_PASS:-${MYSQL_PASSWORD}}
     DB_SERVER_ZBX_USER=${MYSQL_USER:-"zabbix"}
     DB_SERVER_ZBX_PASS=${MYSQL_PASSWORD:-"zabbix"}
 
@@ -98,7 +98,7 @@ check_db_connect() {
     echo "* DB_SERVER_HOST: ${DB_SERVER_HOST}"
     echo "* DB_SERVER_PORT: ${DB_SERVER_PORT}"
     echo "* DB_SERVER_DBNAME: ${DB_SERVER_DBNAME}"
-    if [ "${DEBUG_MODE}" == "true" ]; then
+    if [ "${DEBUG_MODE,,}" == "true" ]; then
         if [ "${USE_DB_ROOT_USER}" == "true" ]; then
             echo "* DB_SERVER_ROOT_USER: ${DB_SERVER_ROOT_USER}"
             echo "* DB_SERVER_ROOT_PASS: ${DB_SERVER_ROOT_PASS}"
@@ -189,7 +189,9 @@ prepare_zbx_web_config() {
         "$ZABBIX_ETC_DIR/nginx_ssl.conf"
     fi
 
-    if [ "${ENABLE_WEB_ACCESS_LOG:-"true"}" == "false" ]; then
+    ENABLE_WEB_ACCESS_LOG=${ENABLE_WEB_ACCESS_LOG:-"true"}
+
+    if [ "${ENABLE_WEB_ACCESS_LOG,,}" == "false" ]; then
         sed -ri \
             -e 's!^(\s*access_log).+\;!\1 off\;!g' \
             "/etc/nginx/nginx.conf"
diff --git a/web-nginx-mysql/ubuntu/docker-entrypoint.sh b/web-nginx-mysql/ubuntu/docker-entrypoint.sh
index 9be717bf3..f62b2233d 100755
--- a/web-nginx-mysql/ubuntu/docker-entrypoint.sh
+++ b/web-nginx-mysql/ubuntu/docker-entrypoint.sh
@@ -5,7 +5,7 @@ set -o pipefail
 set +e
 
 # Script trace mode
-if [ "${DEBUG_MODE}" == "true" ]; then
+if [ "${DEBUG_MODE,,}" == "true" ]; then
     set -o xtrace
 fi
 
@@ -66,17 +66,17 @@ check_variables() {
     file_env MYSQL_USER
     file_env MYSQL_PASSWORD
 
-    if [ ! -n "${MYSQL_USER}" ] && [ "${MYSQL_RANDOM_ROOT_PASSWORD}" == "true" ]; then
+    if [ ! -n "${MYSQL_USER}" ] && [ "${MYSQL_RANDOM_ROOT_PASSWORD,,}" == "true" ]; then
         echo "**** Impossible to use MySQL server because of unknown Zabbix user and random 'root' password"
         exit 1
     fi
 
-    if [ ! -n "${MYSQL_USER}" ] && [ ! -n "${MYSQL_ROOT_PASSWORD}" ] && [ "${MYSQL_ALLOW_EMPTY_PASSWORD}" != "true" ]; then
+    if [ ! -n "${MYSQL_USER}" ] && [ ! -n "${MYSQL_ROOT_PASSWORD}" ] && [ "${MYSQL_ALLOW_EMPTY_PASSWORD,,}" != "true" ]; then
         echo "*** Impossible to use MySQL server because 'root' password is not defined and it is not empty"
         exit 1
     fi
 
-    if [ "${MYSQL_ALLOW_EMPTY_PASSWORD}" == "true" ] || [ -n "${MYSQL_ROOT_PASSWORD}" ]; then
+    if [ "${MYSQL_ALLOW_EMPTY_PASSWORD,,}" == "true" ] || [ -n "${MYSQL_ROOT_PASSWORD}" ]; then
         USE_DB_ROOT_USER=true
         DB_SERVER_ROOT_USER="root"
         DB_SERVER_ROOT_PASS=${MYSQL_ROOT_PASSWORD:-""}
@@ -85,8 +85,8 @@ check_variables() {
     [ -n "${MYSQL_USER}" ] && CREATE_ZBX_DB_USER=true
 
     # If root password is not specified use provided credentials
-    : ${DB_SERVER_ROOT_USER:=${MYSQL_USER}}....
-    [ "${MYSQL_ALLOW_EMPTY_PASSWORD}" == "true" ] || DB_SERVER_ROOT_PASS=${DB_SERVER_ROOT_PASS:-${MYSQL_PASSWORD}}
+    : ${DB_SERVER_ROOT_USER:=${MYSQL_USER}}
+    [ "${MYSQL_ALLOW_EMPTY_PASSWORD,,}" == "true" ] || DB_SERVER_ROOT_PASS=${DB_SERVER_ROOT_PASS:-${MYSQL_PASSWORD}}
     DB_SERVER_ZBX_USER=${MYSQL_USER:-"zabbix"}
     DB_SERVER_ZBX_PASS=${MYSQL_PASSWORD:-"zabbix"}
 
@@ -98,7 +98,7 @@ check_db_connect() {
     echo "* DB_SERVER_HOST: ${DB_SERVER_HOST}"
     echo "* DB_SERVER_PORT: ${DB_SERVER_PORT}"
     echo "* DB_SERVER_DBNAME: ${DB_SERVER_DBNAME}"
-    if [ "${DEBUG_MODE}" == "true" ]; then
+    if [ "${DEBUG_MODE,,}" == "true" ]; then
         if [ "${USE_DB_ROOT_USER}" == "true" ]; then
             echo "* DB_SERVER_ROOT_USER: ${DB_SERVER_ROOT_USER}"
             echo "* DB_SERVER_ROOT_PASS: ${DB_SERVER_ROOT_PASS}"
@@ -189,7 +189,9 @@ prepare_zbx_web_config() {
         "$ZABBIX_ETC_DIR/nginx_ssl.conf"
     fi
 
-    if [ "${ENABLE_WEB_ACCESS_LOG:-"true"}" == "false" ]; then
+    ENABLE_WEB_ACCESS_LOG=${ENABLE_WEB_ACCESS_LOG:-"true"}
+
+    if [ "${ENABLE_WEB_ACCESS_LOG,,}" == "false" ]; then
         sed -ri \
             -e 's!^(\s*access_log).+\;!\1 off\;!g' \
             "/etc/nginx/nginx.conf"
diff --git a/web-nginx-pgsql/alpine/docker-entrypoint.sh b/web-nginx-pgsql/alpine/docker-entrypoint.sh
index 8adf447e5..05ed641db 100755
--- a/web-nginx-pgsql/alpine/docker-entrypoint.sh
+++ b/web-nginx-pgsql/alpine/docker-entrypoint.sh
@@ -5,7 +5,7 @@ set -o pipefail
 set +e
 
 # Script trace mode
-if [ "${DEBUG_MODE}" == "true" ]; then
+if [ "${DEBUG_MODE,,}" == "true" ]; then
     set -o xtrace
 fi
 
@@ -83,7 +83,7 @@ check_db_connect() {
     echo "* DB_SERVER_PORT: ${DB_SERVER_PORT}"
     echo "* DB_SERVER_DBNAME: ${DB_SERVER_DBNAME}"
     echo "* DB_SERVER_SCHEMA: ${DB_SERVER_SCHEMA}"
-    if [ "${DEBUG_MODE}" == "true" ]; then
+    if [ "${DEBUG_MODE,,}" == "true" ]; then
         if [ "${USE_DB_ROOT_USER}" == "true" ]; then
             echo "* DB_SERVER_ROOT_USER: ${DB_SERVER_ROOT_USER}"
             echo "* DB_SERVER_ROOT_PASS: ${DB_SERVER_ROOT_PASS}"
@@ -186,7 +186,9 @@ prepare_zbx_web_config() {
         "$ZABBIX_ETC_DIR/nginx_ssl.conf"
     fi
 
-    if [ "${ENABLE_WEB_ACCESS_LOG:-"true"}" == "false" ]; then
+    ENABLE_WEB_ACCESS_LOG=${ENABLE_WEB_ACCESS_LOG:-"true"}
+
+    if [ "${ENABLE_WEB_ACCESS_LOG,,}" == "false" ]; then
         sed -ri \
             -e 's!^(\s*access_log).+\;!\1 off\;!g' \
             "/etc/nginx/nginx.conf"
diff --git a/web-nginx-pgsql/centos/docker-entrypoint.sh b/web-nginx-pgsql/centos/docker-entrypoint.sh
index a61df4f45..296db45ec 100755
--- a/web-nginx-pgsql/centos/docker-entrypoint.sh
+++ b/web-nginx-pgsql/centos/docker-entrypoint.sh
@@ -5,7 +5,7 @@ set -o pipefail
 set +e
 
 # Script trace mode
-if [ "${DEBUG_MODE}" == "true" ]; then
+if [ "${DEBUG_MODE,,}" == "true" ]; then
     set -o xtrace
 fi
 
@@ -83,7 +83,7 @@ check_db_connect() {
     echo "* DB_SERVER_PORT: ${DB_SERVER_PORT}"
     echo "* DB_SERVER_DBNAME: ${DB_SERVER_DBNAME}"
     echo "* DB_SERVER_SCHEMA: ${DB_SERVER_SCHEMA}"
-    if [ "${DEBUG_MODE}" == "true" ]; then
+    if [ "${DEBUG_MODE,,}" == "true" ]; then
         if [ "${USE_DB_ROOT_USER}" == "true" ]; then
             echo "* DB_SERVER_ROOT_USER: ${DB_SERVER_ROOT_USER}"
             echo "* DB_SERVER_ROOT_PASS: ${DB_SERVER_ROOT_PASS}"
@@ -186,7 +186,9 @@ prepare_zbx_web_config() {
         "$ZABBIX_ETC_DIR/nginx_ssl.conf"
     fi
 
-    if [ "${ENABLE_WEB_ACCESS_LOG:-"true"}" == "false" ]; then
+    ENABLE_WEB_ACCESS_LOG=${ENABLE_WEB_ACCESS_LOG:-"true"}
+
+    if [ "${ENABLE_WEB_ACCESS_LOG,,}" == "false" ]; then
         sed -ri \
             -e 's!^(\s*access_log).+\;!\1 off\;!g' \
             "/etc/nginx/nginx.conf"
diff --git a/web-nginx-pgsql/ubuntu/docker-entrypoint.sh b/web-nginx-pgsql/ubuntu/docker-entrypoint.sh
index db1c55418..491cf1541 100755
--- a/web-nginx-pgsql/ubuntu/docker-entrypoint.sh
+++ b/web-nginx-pgsql/ubuntu/docker-entrypoint.sh
@@ -5,7 +5,7 @@ set -o pipefail
 set +e
 
 # Script trace mode
-if [ "${DEBUG_MODE}" == "true" ]; then
+if [ "${DEBUG_MODE,,}" == "true" ]; then
     set -o xtrace
 fi
 
@@ -83,7 +83,7 @@ check_db_connect() {
     echo "* DB_SERVER_PORT: ${DB_SERVER_PORT}"
     echo "* DB_SERVER_DBNAME: ${DB_SERVER_DBNAME}"
     echo "* DB_SERVER_SCHEMA: ${DB_SERVER_SCHEMA}"
-    if [ "${DEBUG_MODE}" == "true" ]; then
+    if [ "${DEBUG_MODE,,}" == "true" ]; then
         if [ "${USE_DB_ROOT_USER}" == "true" ]; then
             echo "* DB_SERVER_ROOT_USER: ${DB_SERVER_ROOT_USER}"
             echo "* DB_SERVER_ROOT_PASS: ${DB_SERVER_ROOT_PASS}"
@@ -186,7 +186,9 @@ prepare_zbx_web_config() {
         "$ZABBIX_ETC_DIR/nginx_ssl.conf"
     fi
 
-    if [ "${ENABLE_WEB_ACCESS_LOG:-"true"}" == "false" ]; then
+    ENABLE_WEB_ACCESS_LOG=${ENABLE_WEB_ACCESS_LOG:-"true"}
+
+    if [ "${ENABLE_WEB_ACCESS_LOG,,}" == "false" ]; then
         sed -ri \
             -e 's!^(\s*access_log).+\;!\1 off\;!g' \
             "/etc/nginx/nginx.conf"

From 8160056240fdce062c437c579d78b826d1af58a9 Mon Sep 17 00:00:00 2001
From: Alexey Pustovalov <alexey.pustovalov@zabbix.com>
Date: Tue, 13 Apr 2021 07:09:40 -0400
Subject: [PATCH 4/4] Ignore case for boolean vars

---
 web-apache-mysql/alpine/docker-entrypoint.sh | 5 +++--
 web-apache-mysql/centos/docker-entrypoint.sh | 5 +++--
 web-apache-mysql/ubuntu/docker-entrypoint.sh | 5 +++--
 web-apache-pgsql/alpine/docker-entrypoint.sh | 5 +++--
 web-apache-pgsql/centos/docker-entrypoint.sh | 5 +++--
 web-apache-pgsql/ubuntu/docker-entrypoint.sh | 5 +++--
 web-nginx-mysql/alpine/docker-entrypoint.sh  | 5 +++--
 web-nginx-mysql/centos/docker-entrypoint.sh  | 5 +++--
 web-nginx-mysql/ubuntu/docker-entrypoint.sh  | 5 +++--
 web-nginx-pgsql/alpine/docker-entrypoint.sh  | 5 +++--
 web-nginx-pgsql/centos/docker-entrypoint.sh  | 5 +++--
 web-nginx-pgsql/ubuntu/docker-entrypoint.sh  | 5 +++--
 12 files changed, 36 insertions(+), 24 deletions(-)

diff --git a/web-apache-mysql/alpine/docker-entrypoint.sh b/web-apache-mysql/alpine/docker-entrypoint.sh
index 9a756f51c..0a43f7f5e 100755
--- a/web-apache-mysql/alpine/docker-entrypoint.sh
+++ b/web-apache-mysql/alpine/docker-entrypoint.sh
@@ -146,7 +146,8 @@ prepare_web_server() {
 prepare_zbx_web_config() {
     echo "** Preparing Zabbix frontend configuration file"
 
-    export ZBX_DENY_GUI_ACCESS=${ZBX_DENY_GUI_ACCESS:-"false"}
+    : ${ZBX_DENY_GUI_ACCESS:="false"}
+    export ZBX_DENY_GUI_ACCESS=${ZBX_DENY_GUI_ACCESS,,}
     export ZBX_GUI_ACCESS_IP_RANGE=${ZBX_GUI_ACCESS_IP_RANGE:-"['127.0.0.1']"}
     export ZBX_GUI_WARNING_MSG=${ZBX_GUI_WARNING_MSG:-"Zabbix is under maintenance."}
 
@@ -168,7 +169,7 @@ prepare_zbx_web_config() {
     export ZBX_SERVER_PORT=${ZBX_SERVER_PORT:-"10051"}
     export ZBX_SERVER_NAME=${ZBX_SERVER_NAME}
 
-    ENABLE_WEB_ACCESS_LOG=${ENABLE_WEB_ACCESS_LOG:-"true"}
+    : ${ENABLE_WEB_ACCESS_LOG:="true"}
 
     if [ "${ENABLE_WEB_ACCESS_LOG,,}" == "false" ]; then
         sed -ri \
diff --git a/web-apache-mysql/centos/docker-entrypoint.sh b/web-apache-mysql/centos/docker-entrypoint.sh
index 5ff556d2d..1c34c3337 100755
--- a/web-apache-mysql/centos/docker-entrypoint.sh
+++ b/web-apache-mysql/centos/docker-entrypoint.sh
@@ -146,7 +146,8 @@ prepare_web_server() {
 prepare_zbx_web_config() {
     echo "** Preparing Zabbix frontend configuration file"
 
-    export ZBX_DENY_GUI_ACCESS=${ZBX_DENY_GUI_ACCESS:-"false"}
+    : ${ZBX_DENY_GUI_ACCESS:="false"}
+    export ZBX_DENY_GUI_ACCESS=${ZBX_DENY_GUI_ACCESS,,}
     export ZBX_GUI_ACCESS_IP_RANGE=${ZBX_GUI_ACCESS_IP_RANGE:-"['127.0.0.1']"}
     export ZBX_GUI_WARNING_MSG=${ZBX_GUI_WARNING_MSG:-"Zabbix is under maintenance."}
 
@@ -168,7 +169,7 @@ prepare_zbx_web_config() {
     export ZBX_SERVER_PORT=${ZBX_SERVER_PORT:-"10051"}
     export ZBX_SERVER_NAME=${ZBX_SERVER_NAME}
 
-    ENABLE_WEB_ACCESS_LOG=${ENABLE_WEB_ACCESS_LOG:-"true"}
+    : ${ENABLE_WEB_ACCESS_LOG:="true"}
 
     if [ "${ENABLE_WEB_ACCESS_LOG,,}" == "false" ]; then
         sed -ri \
diff --git a/web-apache-mysql/ubuntu/docker-entrypoint.sh b/web-apache-mysql/ubuntu/docker-entrypoint.sh
index b42a664ca..1b5368504 100755
--- a/web-apache-mysql/ubuntu/docker-entrypoint.sh
+++ b/web-apache-mysql/ubuntu/docker-entrypoint.sh
@@ -146,7 +146,8 @@ prepare_web_server() {
 prepare_zbx_web_config() {
     echo "** Preparing Zabbix frontend configuration file"
 
-    export ZBX_DENY_GUI_ACCESS=${ZBX_DENY_GUI_ACCESS:-"false"}
+    : ${ZBX_DENY_GUI_ACCESS:="false"}
+    export ZBX_DENY_GUI_ACCESS=${ZBX_DENY_GUI_ACCESS,,}
     export ZBX_GUI_ACCESS_IP_RANGE=${ZBX_GUI_ACCESS_IP_RANGE:-"['127.0.0.1']"}
     export ZBX_GUI_WARNING_MSG=${ZBX_GUI_WARNING_MSG:-"Zabbix is under maintenance."}
 
@@ -168,7 +169,7 @@ prepare_zbx_web_config() {
     export ZBX_SERVER_PORT=${ZBX_SERVER_PORT:-"10051"}
     export ZBX_SERVER_NAME=${ZBX_SERVER_NAME}
 
-    ENABLE_WEB_ACCESS_LOG=${ENABLE_WEB_ACCESS_LOG:-"true"}
+    : ${ENABLE_WEB_ACCESS_LOG:="true"}
 
     if [ "${ENABLE_WEB_ACCESS_LOG,,}" == "false" ]; then
         sed -ri \
diff --git a/web-apache-pgsql/alpine/docker-entrypoint.sh b/web-apache-pgsql/alpine/docker-entrypoint.sh
index b0d793525..4acb62af1 100755
--- a/web-apache-pgsql/alpine/docker-entrypoint.sh
+++ b/web-apache-pgsql/alpine/docker-entrypoint.sh
@@ -143,7 +143,8 @@ prepare_web_server() {
 prepare_zbx_web_config() {
     echo "** Preparing Zabbix frontend configuration file"
 
-    export ZBX_DENY_GUI_ACCESS=${ZBX_DENY_GUI_ACCESS:-"false"}
+    : ${ZBX_DENY_GUI_ACCESS:="false"}
+    export ZBX_DENY_GUI_ACCESS=${ZBX_DENY_GUI_ACCESS,,}
     export ZBX_GUI_ACCESS_IP_RANGE=${ZBX_GUI_ACCESS_IP_RANGE:-"['127.0.0.1']"}
     export ZBX_GUI_WARNING_MSG=${ZBX_GUI_WARNING_MSG:-"Zabbix is under maintenance."}
 
@@ -165,7 +166,7 @@ prepare_zbx_web_config() {
     export ZBX_SERVER_PORT=${ZBX_SERVER_PORT:-"10051"}
     export ZBX_SERVER_NAME=${ZBX_SERVER_NAME}
 
-    ENABLE_WEB_ACCESS_LOG=${ENABLE_WEB_ACCESS_LOG:-"true"}
+    : ${ENABLE_WEB_ACCESS_LOG:="true"}
 
     if [ "${ENABLE_WEB_ACCESS_LOG,,}" == "false" ]; then
         sed -ri \
diff --git a/web-apache-pgsql/centos/docker-entrypoint.sh b/web-apache-pgsql/centos/docker-entrypoint.sh
index e8eac21b6..bbace0663 100755
--- a/web-apache-pgsql/centos/docker-entrypoint.sh
+++ b/web-apache-pgsql/centos/docker-entrypoint.sh
@@ -143,7 +143,8 @@ prepare_web_server() {
 prepare_zbx_web_config() {
     echo "** Preparing Zabbix frontend configuration file"
 
-    export ZBX_DENY_GUI_ACCESS=${ZBX_DENY_GUI_ACCESS:-"false"}
+    : ${ZBX_DENY_GUI_ACCESS:="false"}
+    export ZBX_DENY_GUI_ACCESS=${ZBX_DENY_GUI_ACCESS,,}
     export ZBX_GUI_ACCESS_IP_RANGE=${ZBX_GUI_ACCESS_IP_RANGE:-"['127.0.0.1']"}
     export ZBX_GUI_WARNING_MSG=${ZBX_GUI_WARNING_MSG:-"Zabbix is under maintenance."}
 
@@ -165,7 +166,7 @@ prepare_zbx_web_config() {
     export ZBX_SERVER_PORT=${ZBX_SERVER_PORT:-"10051"}
     export ZBX_SERVER_NAME=${ZBX_SERVER_NAME}
 
-    ENABLE_WEB_ACCESS_LOG=${ENABLE_WEB_ACCESS_LOG:-"true"}
+    : ${ENABLE_WEB_ACCESS_LOG:="true"}
 
     if [ "${ENABLE_WEB_ACCESS_LOG,,}" == "false" ]; then
         sed -ri \
diff --git a/web-apache-pgsql/ubuntu/docker-entrypoint.sh b/web-apache-pgsql/ubuntu/docker-entrypoint.sh
index d738a5f3c..3960dec72 100755
--- a/web-apache-pgsql/ubuntu/docker-entrypoint.sh
+++ b/web-apache-pgsql/ubuntu/docker-entrypoint.sh
@@ -143,7 +143,8 @@ prepare_web_server() {
 prepare_zbx_web_config() {
     echo "** Preparing Zabbix frontend configuration file"
 
-    export ZBX_DENY_GUI_ACCESS=${ZBX_DENY_GUI_ACCESS:-"false"}
+    : ${ZBX_DENY_GUI_ACCESS:="false"}
+    export ZBX_DENY_GUI_ACCESS=${ZBX_DENY_GUI_ACCESS,,}
     export ZBX_GUI_ACCESS_IP_RANGE=${ZBX_GUI_ACCESS_IP_RANGE:-"['127.0.0.1']"}
     export ZBX_GUI_WARNING_MSG=${ZBX_GUI_WARNING_MSG:-"Zabbix is under maintenance."}
 
@@ -165,7 +166,7 @@ prepare_zbx_web_config() {
     export ZBX_SERVER_PORT=${ZBX_SERVER_PORT:-"10051"}
     export ZBX_SERVER_NAME=${ZBX_SERVER_NAME}
 
-    ENABLE_WEB_ACCESS_LOG=${ENABLE_WEB_ACCESS_LOG:-"true"}
+    : ${ENABLE_WEB_ACCESS_LOG:="true"}
 
     if [ "${ENABLE_WEB_ACCESS_LOG,,}" == "false" ]; then
         sed -ri \
diff --git a/web-nginx-mysql/alpine/docker-entrypoint.sh b/web-nginx-mysql/alpine/docker-entrypoint.sh
index d7de2624d..771cfe61f 100755
--- a/web-nginx-mysql/alpine/docker-entrypoint.sh
+++ b/web-nginx-mysql/alpine/docker-entrypoint.sh
@@ -156,7 +156,8 @@ prepare_zbx_web_config() {
         echo "listen.group = nginx" >> "$PHP_CONFIG_FILE"
     fi
 
-    export ZBX_DENY_GUI_ACCESS=${ZBX_DENY_GUI_ACCESS:-"false"}
+    : ${ZBX_DENY_GUI_ACCESS:="false"}
+    export ZBX_DENY_GUI_ACCESS=${ZBX_DENY_GUI_ACCESS,,}
     export ZBX_GUI_ACCESS_IP_RANGE=${ZBX_GUI_ACCESS_IP_RANGE:-"['127.0.0.1']"}
     export ZBX_GUI_WARNING_MSG=${ZBX_GUI_WARNING_MSG:-"Zabbix is under maintenance."}
 
@@ -189,7 +190,7 @@ prepare_zbx_web_config() {
         "$ZABBIX_ETC_DIR/nginx_ssl.conf"
     fi
 
-    ENABLE_WEB_ACCESS_LOG=${ENABLE_WEB_ACCESS_LOG:-"true"}
+    : ${ENABLE_WEB_ACCESS_LOG:="true"}
 
     if [ "${ENABLE_WEB_ACCESS_LOG,,}" == "false" ]; then
         sed -ri \
diff --git a/web-nginx-mysql/centos/docker-entrypoint.sh b/web-nginx-mysql/centos/docker-entrypoint.sh
index bb70db748..dc6c7b6f3 100755
--- a/web-nginx-mysql/centos/docker-entrypoint.sh
+++ b/web-nginx-mysql/centos/docker-entrypoint.sh
@@ -156,7 +156,8 @@ prepare_zbx_web_config() {
         echo "listen.group = nginx" >> "$PHP_CONFIG_FILE"
     fi
 
-    export ZBX_DENY_GUI_ACCESS=${ZBX_DENY_GUI_ACCESS:-"false"}
+    : ${ZBX_DENY_GUI_ACCESS:="false"}
+    export ZBX_DENY_GUI_ACCESS=${ZBX_DENY_GUI_ACCESS,,}
     export ZBX_GUI_ACCESS_IP_RANGE=${ZBX_GUI_ACCESS_IP_RANGE:-"['127.0.0.1']"}
     export ZBX_GUI_WARNING_MSG=${ZBX_GUI_WARNING_MSG:-"Zabbix is under maintenance."}
 
@@ -189,7 +190,7 @@ prepare_zbx_web_config() {
         "$ZABBIX_ETC_DIR/nginx_ssl.conf"
     fi
 
-    ENABLE_WEB_ACCESS_LOG=${ENABLE_WEB_ACCESS_LOG:-"true"}
+    : ${ENABLE_WEB_ACCESS_LOG:="true"}
 
     if [ "${ENABLE_WEB_ACCESS_LOG,,}" == "false" ]; then
         sed -ri \
diff --git a/web-nginx-mysql/ubuntu/docker-entrypoint.sh b/web-nginx-mysql/ubuntu/docker-entrypoint.sh
index f62b2233d..338191b85 100755
--- a/web-nginx-mysql/ubuntu/docker-entrypoint.sh
+++ b/web-nginx-mysql/ubuntu/docker-entrypoint.sh
@@ -156,7 +156,8 @@ prepare_zbx_web_config() {
         echo "listen.group = nginx" >> "$PHP_CONFIG_FILE"
     fi
 
-    export ZBX_DENY_GUI_ACCESS=${ZBX_DENY_GUI_ACCESS:-"false"}
+    : ${ZBX_DENY_GUI_ACCESS:="false"}
+    export ZBX_DENY_GUI_ACCESS=${ZBX_DENY_GUI_ACCESS,,}
     export ZBX_GUI_ACCESS_IP_RANGE=${ZBX_GUI_ACCESS_IP_RANGE:-"['127.0.0.1']"}
     export ZBX_GUI_WARNING_MSG=${ZBX_GUI_WARNING_MSG:-"Zabbix is under maintenance."}
 
@@ -189,7 +190,7 @@ prepare_zbx_web_config() {
         "$ZABBIX_ETC_DIR/nginx_ssl.conf"
     fi
 
-    ENABLE_WEB_ACCESS_LOG=${ENABLE_WEB_ACCESS_LOG:-"true"}
+    : ${ENABLE_WEB_ACCESS_LOG:="true"}
 
     if [ "${ENABLE_WEB_ACCESS_LOG,,}" == "false" ]; then
         sed -ri \
diff --git a/web-nginx-pgsql/alpine/docker-entrypoint.sh b/web-nginx-pgsql/alpine/docker-entrypoint.sh
index 05ed641db..06cb140e6 100755
--- a/web-nginx-pgsql/alpine/docker-entrypoint.sh
+++ b/web-nginx-pgsql/alpine/docker-entrypoint.sh
@@ -153,7 +153,8 @@ prepare_zbx_web_config() {
         echo "listen.group = nginx" >> "$PHP_CONFIG_FILE"
     fi
 
-    export ZBX_DENY_GUI_ACCESS=${ZBX_DENY_GUI_ACCESS:-"false"}
+    : ${ZBX_DENY_GUI_ACCESS:="false"}
+    export ZBX_DENY_GUI_ACCESS=${ZBX_DENY_GUI_ACCESS,,}
     export ZBX_GUI_ACCESS_IP_RANGE=${ZBX_GUI_ACCESS_IP_RANGE:-"['127.0.0.1']"}
     export ZBX_GUI_WARNING_MSG=${ZBX_GUI_WARNING_MSG:-"Zabbix is under maintenance."}
 
@@ -186,7 +187,7 @@ prepare_zbx_web_config() {
         "$ZABBIX_ETC_DIR/nginx_ssl.conf"
     fi
 
-    ENABLE_WEB_ACCESS_LOG=${ENABLE_WEB_ACCESS_LOG:-"true"}
+    : ${ENABLE_WEB_ACCESS_LOG:="true"}
 
     if [ "${ENABLE_WEB_ACCESS_LOG,,}" == "false" ]; then
         sed -ri \
diff --git a/web-nginx-pgsql/centos/docker-entrypoint.sh b/web-nginx-pgsql/centos/docker-entrypoint.sh
index 296db45ec..ec2b40a90 100755
--- a/web-nginx-pgsql/centos/docker-entrypoint.sh
+++ b/web-nginx-pgsql/centos/docker-entrypoint.sh
@@ -153,7 +153,8 @@ prepare_zbx_web_config() {
         echo "listen.group = nginx" >> "$PHP_CONFIG_FILE"
     fi
 
-    export ZBX_DENY_GUI_ACCESS=${ZBX_DENY_GUI_ACCESS:-"false"}
+    : ${ZBX_DENY_GUI_ACCESS:="false"}
+    export ZBX_DENY_GUI_ACCESS=${ZBX_DENY_GUI_ACCESS,,}
     export ZBX_GUI_ACCESS_IP_RANGE=${ZBX_GUI_ACCESS_IP_RANGE:-"['127.0.0.1']"}
     export ZBX_GUI_WARNING_MSG=${ZBX_GUI_WARNING_MSG:-"Zabbix is under maintenance."}
 
@@ -186,7 +187,7 @@ prepare_zbx_web_config() {
         "$ZABBIX_ETC_DIR/nginx_ssl.conf"
     fi
 
-    ENABLE_WEB_ACCESS_LOG=${ENABLE_WEB_ACCESS_LOG:-"true"}
+    : ${ENABLE_WEB_ACCESS_LOG:="true"}
 
     if [ "${ENABLE_WEB_ACCESS_LOG,,}" == "false" ]; then
         sed -ri \
diff --git a/web-nginx-pgsql/ubuntu/docker-entrypoint.sh b/web-nginx-pgsql/ubuntu/docker-entrypoint.sh
index 491cf1541..e274bdb52 100755
--- a/web-nginx-pgsql/ubuntu/docker-entrypoint.sh
+++ b/web-nginx-pgsql/ubuntu/docker-entrypoint.sh
@@ -153,7 +153,8 @@ prepare_zbx_web_config() {
         echo "listen.group = nginx" >> "$PHP_CONFIG_FILE"
     fi
 
-    export ZBX_DENY_GUI_ACCESS=${ZBX_DENY_GUI_ACCESS:-"false"}
+    : ${ZBX_DENY_GUI_ACCESS:="false"}
+    export ZBX_DENY_GUI_ACCESS=${ZBX_DENY_GUI_ACCESS,,}
     export ZBX_GUI_ACCESS_IP_RANGE=${ZBX_GUI_ACCESS_IP_RANGE:-"['127.0.0.1']"}
     export ZBX_GUI_WARNING_MSG=${ZBX_GUI_WARNING_MSG:-"Zabbix is under maintenance."}
 
@@ -186,7 +187,7 @@ prepare_zbx_web_config() {
         "$ZABBIX_ETC_DIR/nginx_ssl.conf"
     fi
 
-    ENABLE_WEB_ACCESS_LOG=${ENABLE_WEB_ACCESS_LOG:-"true"}
+    : ${ENABLE_WEB_ACCESS_LOG:="true"}
 
     if [ "${ENABLE_WEB_ACCESS_LOG,,}" == "false" ]; then
         sed -ri \