zabbix-docker/web-apache-mysql/ubuntu/docker-entrypoint.sh
2021-06-07 08:41:33 -04:00

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#!/bin/bash
set -o pipefail
set +e
# Script trace mode
if [ "${DEBUG_MODE,,}" == "true" ]; then
set -o xtrace
fi
# Default Zabbix installation name
# Used only by Zabbix web-interface
: ${ZBX_SERVER_NAME:="Zabbix docker"}
# Default Zabbix server host
: ${ZBX_SERVER_HOST:="zabbix-server"}
# Default Zabbix server port number
: ${ZBX_SERVER_PORT:="10051"}
# Default timezone for web interface
: ${PHP_TZ:="Europe/Riga"}
# Default directories
# Configuration files directory
ZABBIX_ETC_DIR="/etc/zabbix"
# Web interface www-root directory
ZABBIX_WWW_ROOT="/usr/share/zabbix"
# usage: file_env VAR [DEFAULT]
# as example: file_env 'MYSQL_PASSWORD' 'zabbix'
# (will allow for "$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
check_variables() {
: ${DB_SERVER_HOST:="mysql-server"}
: ${DB_SERVER_PORT:="3306"}
USE_DB_ROOT_USER=false
CREATE_ZBX_DB_USER=false
file_env MYSQL_USER
file_env MYSQL_PASSWORD
if [ ! -n "${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
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
USE_DB_ROOT_USER=true
DB_SERVER_ROOT_USER="root"
DB_SERVER_ROOT_PASS=${MYSQL_ROOT_PASSWORD:-""}
fi
[ -n "${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:-${MYSQL_PASSWORD}}
DB_SERVER_ZBX_USER=${MYSQL_USER:-"zabbix"}
DB_SERVER_ZBX_PASS=${MYSQL_PASSWORD:-"zabbix"}
DB_SERVER_DBNAME=${MYSQL_DATABASE:-"zabbix"}
}
check_db_connect() {
echo "********************"
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 [ "${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: ${DB_SERVER_ZBX_PASS}"
fi
echo "********************"
WAIT_TIMEOUT=5
export MYSQL_PWD="${DB_SERVER_ROOT_PASS}"
while [ ! "$(mysqladmin ping -h ${DB_SERVER_HOST} -P ${DB_SERVER_PORT} -u ${DB_SERVER_ROOT_USER} \
--silent --connect_timeout=10)" ]; do
echo "**** MySQL server is not available. Waiting $WAIT_TIMEOUT seconds..."
sleep $WAIT_TIMEOUT
done
unset MYSQL_PWD
}
prepare_web_server() {
APACHE_SITES_DIR="/etc/apache2/sites-enabled"
echo "** Adding Zabbix virtual host (HTTP)"
if [ -f "$ZABBIX_ETC_DIR/apache.conf" ]; then
ln -sfT "$ZABBIX_ETC_DIR/apache.conf" "$APACHE_SITES_DIR/zabbix.conf"
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 "$ZABBIX_ETC_DIR/apache_ssl.conf" ]; then
ln -sfT "$ZABBIX_ETC_DIR/apache_ssl.conf" "$APACHE_SITES_DIR/zabbix_ssl.conf"
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"
: ${ZBX_DENY_GUI_ACCESS:="false"}
export ZBX_DENY_GUI_ACCESS=${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."}
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=${ZBX_MAXINPUTTIME:-"300"}
export PHP_TZ=${PHP_TZ}
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}
: ${ENABLE_WEB_ACCESS_LOG:="true"}
if [ "${ENABLE_WEB_ACCESS_LOG,,}" == "false" ]; then
sed -ri \
-e 's!^(\s*CustomLog)\s+\S+!\1 /dev/null!g' \
"/etc/apache2/apache2.conf"
sed -ri \
-e 's!^(\s*CustomLog)\s+\S+!\1 /dev/null!g' \
"/etc/apache2/conf-available/other-vhosts-access-log.conf"
fi
}
#################################################
echo "** Deploying Zabbix web-interface (Apache) with MySQL database"
check_variables
check_db_connect
prepare_web_server
prepare_zbx_web_config
echo "########################################################"
if [ "$1" != "" ]; then
echo "** Executing '$@'"
exec "$@"
elif [ -f "/usr/sbin/httpd" ]; then
echo "** Executing HTTPD"
exec /usr/sbin/httpd -D FOREGROUND
else
echo "Unknown instructions. Exiting..."
exit 1
fi
#################################################