zabbix-docker/Dockerfiles/web-service/ol/docker-entrypoint.sh
2021-09-15 22:31:18 +02:00

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#!/bin/bash
set -o pipefail
set +e
# Script trace mode
if [ "${DEBUG_MODE,,}" == "true" ]; then
set -o xtrace
fi
# Default directories
# User 'zabbix' home directory
ZABBIX_USER_HOME_DIR="/var/lib/zabbix"
# Configuration files directory
ZABBIX_ETC_DIR="/etc/zabbix"
escape_spec_char() {
local var_value=$1
var_value="${var_value//\\/\\\\}"
var_value="${var_value//[$'\n']/}"
var_value="${var_value//\//\\/}"
var_value="${var_value//./\\.}"
var_value="${var_value//\*/\\*}"
var_value="${var_value//^/\\^}"
var_value="${var_value//\$/\\\$}"
var_value="${var_value//\&/\\\&}"
var_value="${var_value//\[/\\[}"
var_value="${var_value//\]/\\]}"
echo "$var_value"
}
update_config_var() {
local config_path=$1
local var_name=$2
local var_value=$3
local is_multiple=$4
if [ ! -f "$config_path" ]; then
echo "**** Configuration file '$config_path' does not exist"
return
fi
echo -n "** Updating '$config_path' parameter \"$var_name\": '$var_value'..."
# Remove configuration parameter definition in case of unset parameter value
if [ -z "$var_value" ]; then
sed -i -e "/^$var_name=/d" "$config_path"
echo "removed"
return
fi
# Remove value from configuration parameter in case of double quoted parameter value
if [ "$var_value" == '""' ]; then
sed -i -e "/^$var_name=/s/=.*/=/" "$config_path"
echo "undefined"
return
fi
# Use full path to a file for TLS related configuration parameters
if [[ $var_name =~ ^TLS.*File$ ]]; then
var_value=$ZABBIX_USER_HOME_DIR/enc/$var_value
fi
# Escaping characters in parameter value and name
var_value=$(escape_spec_char "$var_value")
var_name=$(escape_spec_char "$var_name")
if [ "$(grep -E "^$var_name=" $config_path)" ] && [ "$is_multiple" != "true" ]; then
sed -i -e "/^$var_name=/s/=.*/=$var_value/" "$config_path"
echo "updated"
elif [ "$(grep -Ec "^# $var_name=" $config_path)" -gt 1 ]; then
sed -i -e "/^[#;] $var_name=$/i\\$var_name=$var_value" "$config_path"
echo "added first occurrence"
elif [ "$(grep -Ec "^[#;] $var_name=" $config_path)" -gt 0 ]; then
sed -i -e "/^[#;] $var_name=/s/.*/&\n$var_name=$var_value/" "$config_path"
echo "added"
else
sed -i -e '$a\' -e "$var_name=$var_value" "$config_path"
echo "added at the end"
fi
}
prepare_zbx_web_service_config() {
echo "** Preparing Zabbix web service configuration file"
ZBX_CONFIG=$ZABBIX_ETC_DIR/zabbix_web_service.conf
update_config_var $ZBX_CONFIG "LogType" "console"
update_config_var $ZBX_CONFIG "LogFile"
update_config_var $ZBX_CONFIG "LogFileSize"
update_config_var $ZBX_CONFIG "DebugLevel" "${ZBX_DEBUGLEVEL}"
: ${ZBX_ALLOWEDIP:="zabbix-server"}
update_config_var $ZBX_CONFIG "AllowedIP" "${ZBX_ALLOWEDIP}"
update_config_var $ZBX_CONFIG "ListenPort" "${ZBX_LISTENPORT}"
update_config_var $ZBX_CONFIG "Timeout" "${ZBX_TIMEOUT}"
update_config_var $ZBX_CONFIG "TLSAccept" "${ZBX_TLSACCEPT}"
update_config_var $ZBX_CONFIG "TLSCAFile" "${ZBX_TLSCAFILE}"
update_config_var $ZBX_CONFIG "TLSCertFile" "${ZBX_TLSCERTFILE}"
update_config_var $ZBX_CONFIG "TLSKeyFile" "${ZBX_TLSKEYFILE}"
}
prepare_web_service() {
echo "** Preparing Zabbix web service"
prepare_zbx_web_service_config
}
#################################################
if [ "$1" == '/usr/sbin/zabbix_web_service' ]; then
prepare_web_service
fi
exec "$@"
#################################################