zabbix-docker/Dockerfiles/agent2/ol/docker-entrypoint.sh

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#!/bin/bash
set -o pipefail
set +e
# Script trace mode
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if [ "${DEBUG_MODE,,}" == "true" ]; then
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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=$4
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local masklist=("TLSPSKIdentity")
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if [ ! -f "$config_path" ]; then
echo "**** Configuration file '$config_path' does not exist"
return
fi
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if [[ " ${masklist[@]} " =~ " $var_name " ]] && [ ! -z "$var_value" ]; then
echo -n "** Updating '$config_path' parameter \"$var_name\": '****'. Enable DEBUG_MODE to view value ..."
else
echo -n "** Updating '$config_path' parameter \"$var_name\": '$var_value'..."
fi
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# Remove configuration parameter definition in case of unset parameter value
if [ -z "$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 [[ $var_name =~ ^TLS.*File$ ]] && [[ ! $var_value =~ ^/.+$ ]]; then
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var_value=$ZABBIX_USER_HOME_DIR/enc/$var_value
fi
# Escaping characters in parameter value and name
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var_value=$(escape_spec_char "$var_value")
var_name=$(escape_spec_char "$var_name")
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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
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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"
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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_agent2.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"
: ${ZBX_PASSIVE_ALLOW:="true"}
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if [ "${ZBX_PASSIVE_ALLOW,,}" == "true" ]; then
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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}"
: ${ZBX_ACTIVE_ALLOW:="true"}
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if [ "${ZBX_ACTIVE_ALLOW,,}" == "true" ]; then
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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 $ZBX_AGENT_CONFIG "HeartbeatFrequency" "${ZBX_HEARTBEAT_FREQUENCY}"
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update_config_var $ZBX_AGENT_CONFIG "ForceActiveChecksOnStart" "${ZBX_FORCEACTIVECHECKSONSTART}"
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if [ "${ZBX_ENABLEPERSISTENTBUFFER,,}" == "true" ]; then
update_config_var $ZBX_AGENT_CONFIG "EnablePersistentBuffer" "1"
update_config_var $ZBX_AGENT_CONFIG "PersistentBufferFile" "$ZABBIX_USER_HOME_DIR/buffer/agent2.db"
update_config_var $ZBX_AGENT_CONFIG "PersistentBufferPeriod" "${ZBX_PERSISTENTBUFFERPERIOD}"
else
update_config_var $ZBX_AGENT_CONFIG "EnablePersistentBuffer" "0"
fi
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if [ "${ZBX_ENABLESTATUSPORT,,}" == "true" ]; then
update_config_var $ZBX_AGENT_CONFIG "StatusPort" "31999"
fi
update_config_var $ZBX_AGENT_CONFIG "HostInterface" "${ZBX_HOSTINTERFACE}"
update_config_var $ZBX_AGENT_CONFIG "HostInterfaceItem" "${ZBX_HOSTINTERFACEITEM}"
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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}"
# 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_agent2.d/plugins.d/*.conf"
update_config_var $ZBX_AGENT_CONFIG "Include" "/etc/zabbix/zabbix_agentd.d/*.conf" "true"
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update_config_var $ZBX_AGENT_CONFIG "UnsafeUserParameters" "${ZBX_UNSAFEUSERPARAMETERS}"
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}"
update_config_multiple_var $ZBX_AGENT_CONFIG "DenyKey" "${ZBX_DENYKEY}"
update_config_multiple_var $ZBX_AGENT_CONFIG "AllowKey" "${ZBX_ALLOWKEY}"
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}
prepare_zbx_agent_plugin_config() {
echo "** Preparing Zabbix agent plugin configuration files"
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update_config_var "/etc/zabbix/zabbix_agent2.d/plugins.d/mongodb.conf" "Plugins.MongoDB.System.Path" "/usr/sbin/zabbix-agent2-plugin/mongodb"
update_config_var "/etc/zabbix/zabbix_agent2.d/plugins.d/postgresql.conf" "Plugins.PostgreSQL.System.Path" "/usr/sbin/zabbix-agent2-plugin/postgresql"
update_config_var "/etc/zabbix/zabbix_agent2.d/plugins.d/mssql.conf" "Plugins.MSSQL.System.Path" "/usr/sbin/zabbix-agent2-plugin/mssql"
update_config_var "/etc/zabbix/zabbix_agent2.d/plugins.d/ember.conf" "Plugins.EmberPlus.System.Path" "/usr/sbin/zabbix-agent2-plugin/ember-plus"
}
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prepare_agent() {
echo "** Preparing Zabbix agent"
prepare_zbx_agent_config
prepare_zbx_agent_plugin_config
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}
#################################################
if [ "${1#-}" != "$1" ]; then
set -- /usr/sbin/zabbix_agent2 "$@"
fi
if [ "$1" == '/usr/sbin/zabbix_agent2' ]; then
prepare_agent
fi
exec "$@"
#################################################