#!/bin/bash set -o pipefail set +e # Script trace mode if [ "${DEBUG_MODE}" == "true" ]; then set -o xtrace fi # Default Zabbix installation name # Default Zabbix server host : ${ZBX_SERVER_HOST:="zabbix-server"} # Default Zabbix server port number : ${ZBX_SERVER_PORT:="10051"} # 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" else sed -i -e "/^[#;] $var_name=/s/.*/&\n$var_name=$var_value/" "$config_path" echo "added" fi } update_config_multiple_var() { local config_path=$1 local var_name=$2 local var_value=$3 var_value="${var_value%\"}" var_value="${var_value#\"}" local IFS=, local OPT_LIST=($var_value) for value in "${OPT_LIST[@]}"; do update_config_var $config_path $var_name $value true done } prepare_zbx_agent_config() { echo "** Preparing Zabbix agent configuration file" ZBX_AGENT_CONFIG=$ZABBIX_ETC_DIR/zabbix_agentd.conf : ${ZBX_PASSIVESERVERS:=""} : ${ZBX_ACTIVESERVERS:=""} [ -n "$ZBX_PASSIVESERVERS" ] && ZBX_PASSIVESERVERS=","$ZBX_PASSIVESERVERS ZBX_PASSIVESERVERS=$ZBX_SERVER_HOST$ZBX_PASSIVESERVERS [ -n "$ZBX_ACTIVESERVERS" ] && ZBX_ACTIVESERVERS=","$ZBX_ACTIVESERVERS ZBX_ACTIVESERVERS=$ZBX_SERVER_HOST":"$ZBX_SERVER_PORT$ZBX_ACTIVESERVERS update_config_var $ZBX_AGENT_CONFIG "PidFile" update_config_var $ZBX_AGENT_CONFIG "LogType" "console" update_config_var $ZBX_AGENT_CONFIG "LogFile" update_config_var $ZBX_AGENT_CONFIG "LogFileSize" update_config_var $ZBX_AGENT_CONFIG "DebugLevel" "${ZBX_DEBUGLEVEL}" update_config_var $ZBX_AGENT_CONFIG "SourceIP" update_config_var $ZBX_AGENT_CONFIG "EnableRemoteCommands" "${ZBX_ENABLEREMOTECOMMANDS}" update_config_var $ZBX_AGENT_CONFIG "LogRemoteCommands" "${ZBX_LOGREMOTECOMMANDS}" : ${ZBX_PASSIVE_ALLOW:="true"} if [ "$ZBX_PASSIVE_ALLOW" == "true" ]; then echo "** Using '$ZBX_PASSIVESERVERS' servers for passive checks" update_config_var $ZBX_AGENT_CONFIG "Server" "${ZBX_PASSIVESERVERS}" else update_config_var $ZBX_AGENT_CONFIG "Server" fi update_config_var $ZBX_AGENT_CONFIG "ListenPort" "${ZBX_LISTENPORT}" update_config_var $ZBX_AGENT_CONFIG "ListenIP" "${ZBX_LISTENIP}" update_config_var $ZBX_AGENT_CONFIG "StartAgents" "${ZBX_STARTAGENTS}" : ${ZBX_ACTIVE_ALLOW:="true"} if [ "$ZBX_ACTIVE_ALLOW" == "true" ]; then echo "** Using '$ZBX_ACTIVESERVERS' servers for active checks" update_config_var $ZBX_AGENT_CONFIG "ServerActive" "${ZBX_ACTIVESERVERS}" else update_config_var $ZBX_AGENT_CONFIG "ServerActive" fi update_config_var $ZBX_AGENT_CONFIG "Hostname" "${ZBX_HOSTNAME}" update_config_var $ZBX_AGENT_CONFIG "HostnameItem" "${ZBX_HOSTNAMEITEM}" update_config_var $ZBX_AGENT_CONFIG "HostMetadata" "${ZBX_METADATA}" update_config_var $ZBX_AGENT_CONFIG "HostMetadataItem" "${ZBX_METADATAITEM}" update_config_var $ZBX_AGENT_CONFIG "RefreshActiveChecks" "${ZBX_REFRESHACTIVECHECKS}" update_config_var $ZBX_AGENT_CONFIG "BufferSend" "${ZBX_BUFFERSEND}" update_config_var $ZBX_AGENT_CONFIG "BufferSize" "${ZBX_BUFFERSIZE}" update_config_var $ZBX_AGENT_CONFIG "MaxLinesPerSecond" "${ZBX_MAXLINESPERSECOND}" # Please use include to enable Alias feature # update_config_multiple_var $ZBX_AGENT_CONFIG "Alias" ${ZBX_ALIAS} update_config_var $ZBX_AGENT_CONFIG "Timeout" "${ZBX_TIMEOUT}" update_config_var $ZBX_AGENT_CONFIG "Include" "/etc/zabbix/zabbix_agentd.d/" update_config_var $ZBX_AGENT_CONFIG "UnsafeUserParameters" "${ZBX_UNSAFEUSERPARAMETERS}" update_config_var $ZBX_AGENT_CONFIG "LoadModulePath" "$ZABBIX_USER_HOME_DIR/modules/" update_config_multiple_var $ZBX_AGENT_CONFIG "LoadModule" "${ZBX_LOADMODULE}" update_config_var $ZBX_AGENT_CONFIG "TLSConnect" "${ZBX_TLSCONNECT}" update_config_var $ZBX_AGENT_CONFIG "TLSAccept" "${ZBX_TLSACCEPT}" update_config_var $ZBX_AGENT_CONFIG "TLSCAFile" "${ZBX_TLSCAFILE}" update_config_var $ZBX_AGENT_CONFIG "TLSCRLFile" "${ZBX_TLSCRLFILE}" update_config_var $ZBX_AGENT_CONFIG "TLSServerCertIssuer" "${ZBX_TLSSERVERCERTISSUER}" update_config_var $ZBX_AGENT_CONFIG "TLSServerCertSubject" "${ZBX_TLSSERVERCERTSUBJECT}" update_config_var $ZBX_AGENT_CONFIG "TLSCertFile" "${ZBX_TLSCERTFILE}" update_config_var $ZBX_AGENT_CONFIG "TLSKeyFile" "${ZBX_TLSKEYFILE}" update_config_var $ZBX_AGENT_CONFIG "TLSPSKIdentity" "${ZBX_TLSPSKIDENTITY}" update_config_var $ZBX_AGENT_CONFIG "TLSPSKFile" "${ZBX_TLSPSKFILE}" if [ "$(id -u)" != '0' ]; then update_config_var $ZBX_AGENT_CONFIG "User" "$(whoami)" else update_config_var $ZBX_AGENT_CONFIG "AllowRoot" "1" fi } prepare_agent() { echo "** Preparing Zabbix agent" prepare_zbx_agent_config } ################################################# if [ "${1#-}" != "$1" ]; then set -- /usr/sbin/zabbix_agentd "$@" fi if [ "$1" == '/usr/sbin/zabbix_agentd' ]; then prepare_agent fi exec "$@" #################################################