zabbix-docker/Dockerfiles/web-apache-mysql/alpine/docker-entrypoint.sh

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#!/bin/bash
set -o pipefail
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set +e
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# Script trace mode
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if [ "${DEBUG_MODE,,}" == "true" ]; then
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set -o xtrace
fi
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# Default Zabbix installation name
# Used only by Zabbix web-interface
: ${ZBX_SERVER_NAME:="Zabbix docker"}
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# Default Zabbix server host
: ${ZBX_SERVER_HOST:="zabbix-server"}
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# Default Zabbix server port number
: ${ZBX_SERVER_PORT:="10051"}
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# Default timezone for web interface
: ${PHP_TZ:="Europe/Riga"}
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# Default directories
# Configuration files directory
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ZABBIX_ETC_DIR="/etc/zabbix"
# Web interface www-root directory
ZABBIX_WWW_ROOT="/usr/share/zabbix"
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# usage: file_env VAR [DEFAULT]
# as example: file_env 'MYSQL_PASSWORD' 'zabbix'
# (will allow for "$MYSQL_PASSWORD_FILE" to fill in the value of "$MYSQL_PASSWORD" from a file)
# unsets the VAR_FILE afterwards and just leaving VAR
file_env() {
local var="$1"
local fileVar="${var}_FILE"
local defaultValue="${2:-}"
if [ "${!var:-}" ] && [ "${!fileVar:-}" ]; then
echo "**** Both variables $var and $fileVar are set (but are exclusive)"
exit 1
fi
local val="$defaultValue"
if [ "${!var:-}" ]; then
val="${!var}"
echo "** Using ${var} variable from ENV"
elif [ "${!fileVar:-}" ]; then
if [ ! -f "${!fileVar}" ]; then
echo "**** Secret file \"${!fileVar}\" is not found"
exit 1
fi
val="$(< "${!fileVar}")"
echo "** Using ${var} variable from secret file"
fi
export "$var"="$val"
unset "$fileVar"
}
# Check prerequisites for MySQL database
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check_variables() {
: ${DB_SERVER_HOST:="mysql-server"}
: ${DB_SERVER_PORT:="3306"}
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USE_DB_ROOT_USER=false
CREATE_ZBX_DB_USER=false
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file_env MYSQL_USER
file_env MYSQL_PASSWORD
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if [ ! -n "${MYSQL_USER}" ] && [ "${MYSQL_RANDOM_ROOT_PASSWORD,,}" == "true" ]; then
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echo "**** Impossible to use MySQL server because of unknown Zabbix user and random 'root' password"
exit 1
fi
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if [ ! -n "${MYSQL_USER}" ] && [ ! -n "${MYSQL_ROOT_PASSWORD}" ] && [ "${MYSQL_ALLOW_EMPTY_PASSWORD,,}" != "true" ]; then
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echo "*** Impossible to use MySQL server because 'root' password is not defined and it is not empty"
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exit 1
fi
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if [ "${MYSQL_ALLOW_EMPTY_PASSWORD,,}" == "true" ] || [ -n "${MYSQL_ROOT_PASSWORD}" ]; then
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USE_DB_ROOT_USER=true
DB_SERVER_ROOT_USER="root"
DB_SERVER_ROOT_PASS=${MYSQL_ROOT_PASSWORD:-""}
fi
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[ -n "${MYSQL_USER}" ] && CREATE_ZBX_DB_USER=true
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# If root password is not specified use provided credentials
: ${DB_SERVER_ROOT_USER:=${MYSQL_USER}}
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[ "${MYSQL_ALLOW_EMPTY_PASSWORD,,}" == "true" ] || DB_SERVER_ROOT_PASS=${DB_SERVER_ROOT_PASS:-${MYSQL_PASSWORD}}
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DB_SERVER_ZBX_USER=${MYSQL_USER:-"zabbix"}
DB_SERVER_ZBX_PASS=${MYSQL_PASSWORD:-"zabbix"}
DB_SERVER_DBNAME=${MYSQL_DATABASE:-"zabbix"}
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}
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db_tls_params() {
local result=""
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if [ "${ZBX_DB_ENCRYPTION,,}" == "true" ]; then
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result="--ssl"
if [ -n "${ZBX_DB_CA_FILE}" ]; then
result="${result} --ssl-ca=${ZBX_DB_CA_FILE}"
fi
if [ -n "${ZBX_DB_KEY_FILE}" ]; then
result="${result} --ssl-key=${ZBX_DB_KEY_FILE}"
fi
if [ -n "${ZBX_DB_CERT_FILE}" ]; then
result="${result} --ssl-cert=${ZBX_DB_CERT_FILE}"
fi
fi
echo $result
}
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check_db_connect() {
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echo "********************"
echo "* DB_SERVER_HOST: ${DB_SERVER_HOST}"
echo "* DB_SERVER_PORT: ${DB_SERVER_PORT}"
echo "* DB_SERVER_DBNAME: ${DB_SERVER_DBNAME}"
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if [ "${DEBUG_MODE,,}" == "true" ]; then
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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}"
fi
echo "* DB_SERVER_ZBX_USER: ${DB_SERVER_ZBX_USER}"
echo "* DB_SERVER_ZBX_PASS: ${DB_SERVER_ZBX_PASS}"
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fi
echo "********************"
WAIT_TIMEOUT=5
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ssl_opts="$(db_tls_params)"
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export MYSQL_PWD="${DB_SERVER_ROOT_PASS}"
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while [ ! "$(mysqladmin ping -h ${DB_SERVER_HOST} -P ${DB_SERVER_PORT} -u ${DB_SERVER_ROOT_USER} \
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--silent --connect_timeout=10 $ssl_opts)" ]; do
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echo "**** MySQL server is not available. Waiting $WAIT_TIMEOUT seconds..."
sleep $WAIT_TIMEOUT
done
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unset MYSQL_PWD
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}
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prepare_web_server() {
APACHE_SITES_DIR=/etc/apache2/conf.d
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echo "** Adding Zabbix virtual host (HTTP)"
if [ -f "$ZABBIX_ETC_DIR/apache.conf" ]; then
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ln -sfT "$ZABBIX_ETC_DIR/apache.conf" "$APACHE_SITES_DIR/zabbix.conf"
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else
echo "**** Impossible to enable HTTP virtual host"
fi
if [ -f "/etc/ssl/apache2/ssl.crt" ] && [ -f "/etc/ssl/apache2/ssl.key" ]; then
echo "** Adding Zabbix virtual host (HTTPS)"
if [ -f "$ZABBIX_ETC_DIR/apache_ssl.conf" ]; then
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ln -sfT "$ZABBIX_ETC_DIR/apache_ssl.conf" "$APACHE_SITES_DIR/zabbix_ssl.conf"
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else
echo "**** Impossible to enable HTTPS virtual host"
fi
else
echo "**** Impossible to enable SSL support for Apache2. Certificates are missed."
fi
}
prepare_zbx_web_config() {
echo "** Preparing Zabbix frontend configuration file"
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: ${ZBX_DENY_GUI_ACCESS:="false"}
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export ZBX_DENY_GUI_ACCESS=${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."}
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export ZBX_MAXEXECUTIONTIME=${ZBX_MAXEXECUTIONTIME:-"600"}
export ZBX_MEMORYLIMIT=${ZBX_MEMORYLIMIT:-"128M"}
export ZBX_POSTMAXSIZE=${ZBX_POSTMAXSIZE:-"16M"}
export ZBX_UPLOADMAXFILESIZE=${ZBX_UPLOADMAXFILESIZE:-"2M"}
export ZBX_MAXINPUTTIME=${ZBX_MAXINPUTTIME:-"300"}
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export PHP_TZ=${PHP_TZ}
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export DB_SERVER_TYPE="MYSQL"
export DB_SERVER_HOST=${DB_SERVER_HOST}
export DB_SERVER_PORT=${DB_SERVER_PORT}
export DB_SERVER_DBNAME=${DB_SERVER_DBNAME}
export DB_SERVER_SCHEMA=${DB_SERVER_SCHEMA}
export DB_SERVER_USER=${DB_SERVER_ZBX_USER}
export DB_SERVER_PASS=${DB_SERVER_ZBX_PASS}
export ZBX_SERVER_HOST=${ZBX_SERVER_HOST}
export ZBX_SERVER_PORT=${ZBX_SERVER_PORT:-"10051"}
export ZBX_SERVER_NAME=${ZBX_SERVER_NAME}
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: ${ZBX_DB_ENCRYPTION:="false"}
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export ZBX_DB_ENCRYPTION=${ZBX_DB_ENCRYPTION,,}
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export ZBX_DB_KEY_FILE=${ZBX_DB_KEY_FILE}
export ZBX_DB_CERT_FILE=${ZBX_DB_CERT_FILE}
export ZBX_DB_CA_FILE=${ZBX_DB_CA_FILE}
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: ${ZBX_DB_VERIFY_HOST:="false"}
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export ZBX_DB_VERIFY_HOST=${ZBX_DB_VERIFY_HOST,,}
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: ${DB_DOUBLE_IEEE754:="true"}
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export DB_DOUBLE_IEEE754=${DB_DOUBLE_IEEE754,,}
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export ZBX_HISTORYSTORAGEURL=${ZBX_HISTORYSTORAGEURL}
export ZBX_HISTORYSTORAGETYPES=${ZBX_HISTORYSTORAGETYPES:-"[]"}
export ZBX_SSO_SETTINGS=${ZBX_SSO_SETTINGS:-""}
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if [ -n "${ZBX_SESSION_NAME}" ]; then
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cp "$ZABBIX_WWW_ROOT/include/defines.inc.php" "/tmp/defines.inc.php_tmp"
sed "/ZBX_SESSION_NAME/s/'[^']*'/'${ZBX_SESSION_NAME}'/2" "/tmp/defines.inc.php_tmp" > "$ZABBIX_WWW_ROOT/include/defines.inc.php"
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rm -f "/tmp/defines.inc.php_tmp"
fi
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: ${ENABLE_WEB_ACCESS_LOG:="true"}
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if [ "${ENABLE_WEB_ACCESS_LOG,,}" == "false" ]; then
sed -ri \
-e 's!^(\s*CustomLog)\s+\S+!\1 /dev/null!g' \
"/etc/apache2/httpd.conf"
fi
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}
#################################################
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echo "** Deploying Zabbix web-interface (Apache) with MySQL database"
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check_variables
check_db_connect
prepare_web_server
prepare_zbx_web_config
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echo "########################################################"
if [ "$1" != "" ]; then
echo "** Executing '$@'"
exec "$@"
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elif [ -f "/usr/sbin/httpd" ]; then
echo "** Executing HTTPD"
exec /usr/sbin/httpd -D FOREGROUND
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else
echo "Unknown instructions. Exiting..."
exit 1
fi
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#################################################