mirror of
https://github.com/zabbix/zabbix-docker.git
synced 2024-11-16 12:53:19 +01:00
263 lines
8.3 KiB
Bash
Executable File
263 lines
8.3 KiB
Bash
Executable File
#!/bin/bash
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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
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fi
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# Default Zabbix installation name
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# Used only by Zabbix web-interface
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: ${ZBX_SERVER_NAME:="Zabbix docker"}
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# Default Zabbix server host
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: ${ZBX_SERVER_HOST:="zabbix-server"}
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# Default Zabbix server port number
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: ${ZBX_SERVER_PORT:="10051"}
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# Default timezone for web interface
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: ${PHP_TZ:="Europe/Riga"}
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# Default directories
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# Configuration files directory
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ZABBIX_ETC_DIR="/etc/zabbix"
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# Web interface www-root directory
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ZABBIX_WWW_ROOT="/usr/share/zabbix"
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# usage: file_env VAR [DEFAULT]
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# as example: file_env 'MYSQL_PASSWORD' 'zabbix'
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# (will allow for "$MYSQL_PASSWORD_FILE" to fill in the value of "$MYSQL_PASSWORD" from a file)
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# unsets the VAR_FILE afterwards and just leaving VAR
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file_env() {
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local var="$1"
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local fileVar="${var}_FILE"
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local defaultValue="${2:-}"
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if [ "${!var:-}" ] && [ "${!fileVar:-}" ]; then
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echo "**** Both variables $var and $fileVar are set (but are exclusive)"
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exit 1
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fi
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local val="$defaultValue"
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if [ "${!var:-}" ]; then
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val="${!var}"
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echo "** Using ${var} variable from ENV"
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elif [ "${!fileVar:-}" ]; then
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if [ ! -f "${!fileVar}" ]; then
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echo "**** Secret file \"${!fileVar}\" is not found"
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exit 1
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fi
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val="$(< "${!fileVar}")"
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echo "** Using ${var} variable from secret file"
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fi
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export "$var"="$val"
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unset "$fileVar"
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}
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escape_spec_char() {
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local var_value=$1
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var_value="${var_value//\\/\\\\}"
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var_value="${var_value//[$'\n']/}"
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var_value="${var_value//\//\\/}"
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var_value="${var_value//./\\.}"
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var_value="${var_value//\*/\\*}"
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var_value="${var_value//^/\\^}"
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var_value="${var_value//\$/\\\$}"
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var_value="${var_value//\&/\\\&}"
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var_value="${var_value//\[/\\[}"
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var_value="${var_value//\]/\\]}"
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echo "$var_value"
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}
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update_config_var() {
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local config_path=$1
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local var_name=$2
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local var_value=$3
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local is_multiple=$4
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if [ ! -f "$config_path" ]; then
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echo "**** Configuration file '$config_path' does not exist"
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return
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fi
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echo -n "** Updating '$config_path' parameter \"$var_name\": '$var_value'... "
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# Remove configuration parameter definition in case of unset parameter value
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if [ -z "$var_value" ]; then
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sed -i -e "/^$var_name=/d" "$config_path"
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echo "removed"
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return
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fi
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# Remove value from configuration parameter in case of double quoted parameter value
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if [ "$var_value" == '""' ]; then
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sed -i -e "/^$var_name=/s/=.*/=/" "$config_path"
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echo "undefined"
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return
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fi
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# Escaping characters in parameter value
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var_value=$(escape_spec_char "$var_value")
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if [ "$(grep -E "^$var_name=" $config_path)" ] && [ "$is_multiple" != "true" ]; then
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sed -i -e "/^$var_name=/s/=.*/=$var_value/" "$config_path"
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echo "updated"
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elif [ "$(grep -Ec "^# $var_name=" $config_path)" -gt 1 ]; then
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sed -i -e "/^[#;] $var_name=$/i\\$var_name=$var_value" "$config_path"
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echo "added first occurrence"
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else
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sed -i -e "/^[#;] $var_name=/s/.*/&\n$var_name=$var_value/" "$config_path"
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echo "added"
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fi
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}
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# Check prerequisites for MySQL database
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check_variables_mysql() {
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: ${DB_SERVER_HOST:="mysql-server"}
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: ${DB_SERVER_PORT:="3306"}
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USE_DB_ROOT_USER=false
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CREATE_ZBX_DB_USER=false
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file_env MYSQL_USER
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file_env MYSQL_PASSWORD
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if [ ! -n "${MYSQL_USER}" ] && [ "${MYSQL_RANDOM_ROOT_PASSWORD}" == "true" ]; then
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echo "**** Impossible to use MySQL server because of unknown Zabbix user and random 'root' password"
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exit 1
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fi
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if [ ! -n "${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
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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
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DB_SERVER_ROOT_USER="root"
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DB_SERVER_ROOT_PASS=${MYSQL_ROOT_PASSWORD:-""}
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fi
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[ -n "${MYSQL_USER}" ] && CREATE_ZBX_DB_USER=true
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# If root password is not specified use provided credentials
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: ${DB_SERVER_ROOT_USER:=${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"}
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DB_SERVER_ZBX_PASS=${MYSQL_PASSWORD:-"zabbix"}
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DB_SERVER_DBNAME=${MYSQL_DATABASE:-"zabbix"}
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}
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check_db_connect_mysql() {
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echo "********************"
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echo "* DB_SERVER_HOST: ${DB_SERVER_HOST}"
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echo "* DB_SERVER_PORT: ${DB_SERVER_PORT}"
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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
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echo "* DB_SERVER_ROOT_USER: ${DB_SERVER_ROOT_USER}"
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echo "* DB_SERVER_ROOT_PASS: ${DB_SERVER_ROOT_PASS}"
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fi
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echo "* DB_SERVER_ZBX_USER: ${DB_SERVER_ZBX_USER}"
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echo "* DB_SERVER_ZBX_PASS: ${DB_SERVER_ZBX_PASS}"
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fi
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echo "********************"
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WAIT_TIMEOUT=5
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while [ ! "$(mysqladmin ping -h ${DB_SERVER_HOST} -P ${DB_SERVER_PORT} -u ${DB_SERVER_ROOT_USER} \
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--password="${DB_SERVER_ROOT_PASS}" --silent --connect_timeout=10)" ]; do
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echo "**** MySQL server is not available. Waiting $WAIT_TIMEOUT seconds..."
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sleep $WAIT_TIMEOUT
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done
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}
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mysql_query() {
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query=$1
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local result=""
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result=$(mysql --silent --skip-column-names -h ${DB_SERVER_HOST} -P ${DB_SERVER_PORT} \
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-u ${DB_SERVER_ROOT_USER} --password="${DB_SERVER_ROOT_PASS}" -e "$query")
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echo $result
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}
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prepare_web_server_apache() {
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APACHE_SITES_DIR=/etc/apache2/conf.d
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echo "** Adding Zabbix virtual host (HTTP)"
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if [ -f "$ZABBIX_ETC_DIR/apache.conf" ]; then
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ln -s "$ZABBIX_ETC_DIR/apache.conf" "$APACHE_SITES_DIR/zabbix.conf"
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else
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echo "**** Impossible to enable HTTP virtual host"
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fi
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if [ -f "/etc/ssl/apache2/ssl.crt" ] && [ -f "/etc/ssl/apache2/ssl.key" ]; then
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echo "** Adding Zabbix virtual host (HTTPS)"
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if [ -f "$ZABBIX_ETC_DIR/apache_ssl.conf" ]; then
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ln -s "$ZABBIX_ETC_DIR/apache_ssl.conf" "$APACHE_SITES_DIR/zabbix_ssl.conf"
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else
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echo "**** Impossible to enable HTTPS virtual host"
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fi
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else
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echo "**** Impossible to enable SSL support for Apache2. Certificates are missed."
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fi
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}
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prepare_zbx_web_config() {
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local server_name=""
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echo "** Preparing Zabbix frontend configuration file"
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ZBX_WEB_CONFIG="$ZABBIX_ETC_DIR/web/zabbix.conf.php"
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PHP_CONFIG_FILE="/etc/php7/conf.d/99-zabbix.ini"
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update_config_var "$PHP_CONFIG_FILE" "max_execution_time" "${ZBX_MAXEXECUTIONTIME:-"600"}"
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update_config_var "$PHP_CONFIG_FILE" "memory_limit" "${ZBX_MEMORYLIMIT:-"128M"}"
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update_config_var "$PHP_CONFIG_FILE" "post_max_size" "${ZBX_POSTMAXSIZE:-"16M"}"
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update_config_var "$PHP_CONFIG_FILE" "upload_max_filesize" "${ZBX_UPLOADMAXFILESIZE:-"2M"}"
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update_config_var "$PHP_CONFIG_FILE" "max_input_time" "${ZBX_MAXINPUTTIME:-"300"}"
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update_config_var "$PHP_CONFIG_FILE" "date.timezone" "${PHP_TZ}"
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# Escaping characters in parameter value
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server_name=$(escape_spec_char "${ZBX_SERVER_NAME}")
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server_user=$(escape_spec_char "${DB_SERVER_ZBX_USER}")
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server_pass=$(escape_spec_char "${DB_SERVER_ZBX_PASS}")
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sed -i \
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-e "s/{DB_SERVER_HOST}/${DB_SERVER_HOST}/g" \
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-e "s/{DB_SERVER_PORT}/${DB_SERVER_PORT}/g" \
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-e "s/{DB_SERVER_DBNAME}/${DB_SERVER_DBNAME}/g" \
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-e "s/{DB_SERVER_SCHEMA}/${DB_SERVER_SCHEMA}/g" \
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-e "s/{DB_SERVER_USER}/$server_user/g" \
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-e "s/{DB_SERVER_PASS}/$server_pass/g" \
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-e "s/{ZBX_SERVER_HOST}/${ZBX_SERVER_HOST}/g" \
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-e "s/{ZBX_SERVER_PORT}/${ZBX_SERVER_PORT}/g" \
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-e "s/{ZBX_SERVER_NAME}/$server_name/g" \
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"$ZBX_WEB_CONFIG"
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}
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prepare_web() {
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echo "** Preparing Zabbix web-interface"
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check_variables_mysql
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check_db_connect_mysql
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prepare_web_server_apache
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prepare_zbx_web_config
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}
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#################################################
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if [ "$1" == '/usr/sbin/httpd' ]; then
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prepare_web
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fi
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exec "$@"
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#################################################
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