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zabbix-docker/server-mysql/centos/docker-entrypoint.sh
Alexey Pustovalov 0d9c30f10c Improved password usage in MySQL tools
2020-09-08 17:41:01 -04:00

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#!/bin/bash
set -o pipefail
set +e
# Script trace mode
if [ "${DEBUG_MODE}" == "true" ]; then
set -o xtrace
fi
# Default directories
# User 'zabbix' home directory
ZABBIX_USER_HOME_DIR="/var/lib/zabbix"
# Configuration files directory
ZABBIX_ETC_DIR="/etc/zabbix"
# usage: file_env VAR [DEFAULT]
# as example: file_env 'MYSQL_PASSWORD' 'zabbix'
# (will allow for "$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"
}
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=$4
local masklist=("DBPassword TLSPSKIdentity")
if [ ! -f "$config_path" ]; then
echo "**** Configuration file '$config_path' does not exist"
return
fi
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\": '$var_value'..."
fi
# Remove configuration parameter definition in case of unset parameter value
if [ -z "$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
}
# Check prerequisites for MySQL database
check_variables_mysql() {
: ${DB_SERVER_HOST:="mysql-server"}
: ${DB_SERVER_PORT:="3306"}
USE_DB_ROOT_USER=false
CREATE_ZBX_DB_USER=false
file_env MYSQL_USER
file_env MYSQL_PASSWORD
file_env MYSQL_ROOT_PASSWORD
if [ ! -n "${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}" ] && [ "${USE_DB_ROOT_USER}" == "true" ] && 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"}
}
db_tls_params() {
local result=""
if [ -n "${ZBX_DBTLSCONNECT}" ]; then
ssl_mode=${ZBX_DBTLSCONNECT//verify_full/verify_identity}
result="--ssl-mode=$ssl_mode"
if [ -n "${ZBX_DBTLSCAFILE}" ]; then
result="${result} --ssl-ca=${ZBX_DBTLSCAFILE}"
fi
if [ -n "${ZBX_DBTLSKEYFILE}" ]; then
result="${result} --ssl-key=${ZBX_DBTLSKEYFILE}"
fi
if [ -n "${ZBX_DBTLSCERTFILE}" ]; then
result="${result} --ssl-cert=${ZBX_DBTLSCERTFILE}"
fi
fi
echo $result
}
check_db_connect_mysql() {
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: ${DB_SERVER_ZBX_PASS}"
fi
echo "********************"
WAIT_TIMEOUT=5
ssl_opts="$(db_tls_params)"
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 $ssl_opts)" ]; do
echo "**** MySQL server is not available. Waiting $WAIT_TIMEOUT seconds..."
sleep $WAIT_TIMEOUT
done
unset MYSQL_PWD
}
mysql_query() {
query=$1
local result=""
ssl_opts="$(db_tls_params)"
export MYSQL_PWD="${DB_SERVER_ROOT_PASS}"
result=$(mysql --silent --skip-column-names -h ${DB_SERVER_HOST} -P ${DB_SERVER_PORT} \
-u ${DB_SERVER_ROOT_USER} -e "$query" $ssl_opts)
unset MYSQL_PWD
echo $result
}
create_db_user_mysql() {
[ "${CREATE_ZBX_DB_USER}" == "true" ] || return
echo "** Creating '${DB_SERVER_ZBX_USER}' user in MySQL database"
USER_EXISTS=$(mysql_query "SELECT 1 FROM mysql.user WHERE user = '${DB_SERVER_ZBX_USER}' AND host = '%'")
if [ -z "$USER_EXISTS" ]; then
mysql_query "CREATE USER '${DB_SERVER_ZBX_USER}'@'%' IDENTIFIED BY '${DB_SERVER_ZBX_PASS}'" 1>/dev/null
else
mysql_query "ALTER USER ${DB_SERVER_ZBX_USER} IDENTIFIED BY '${DB_SERVER_ZBX_PASS}';" 1>/dev/null
fi
mysql_query "GRANT ALL PRIVILEGES ON $DB_SERVER_DBNAME. * TO '${DB_SERVER_ZBX_USER}'@'%'" 1>/dev/null
}
create_db_database_mysql() {
DB_EXISTS=$(mysql_query "SELECT SCHEMA_NAME FROM information_schema.SCHEMATA WHERE SCHEMA_NAME='${DB_SERVER_DBNAME}'")
if [ -z ${DB_EXISTS} ]; then
echo "** Database '${DB_SERVER_DBNAME}' does not exist. Creating..."
mysql_query "CREATE DATABASE ${DB_SERVER_DBNAME} CHARACTER SET utf8 COLLATE utf8_bin" 1>/dev/null
# better solution?
mysql_query "GRANT ALL PRIVILEGES ON $DB_SERVER_DBNAME. * TO '${DB_SERVER_ZBX_USER}'@'%'" 1>/dev/null
else
echo "** Database '${DB_SERVER_DBNAME}' already exists. Please be careful with database COLLATE!"
fi
}
create_db_schema_mysql() {
DBVERSION_TABLE_EXISTS=$(mysql_query "SELECT 1 FROM information_schema.tables WHERE table_schema='${DB_SERVER_DBNAME}' and table_name = 'dbversion'")
if [ -n "${DBVERSION_TABLE_EXISTS}" ]; then
echo "** Table '${DB_SERVER_DBNAME}.dbversion' already exists."
ZBX_DB_VERSION=$(mysql_query "SELECT mandatory FROM ${DB_SERVER_DBNAME}.dbversion")
fi
if [ -z "${ZBX_DB_VERSION}" ]; then
echo "** Creating '${DB_SERVER_DBNAME}' schema in MySQL"
ssl_opts="$(db_tls_params)"
export MYSQL_PWD="${DB_SERVER_ROOT_PASS}"
zcat /usr/share/doc/zabbix-server-mysql/create.sql.gz | mysql --silent --skip-column-names \
-h ${DB_SERVER_HOST} -P ${DB_SERVER_PORT} \
-u ${DB_SERVER_ROOT_USER} $ssl_opts \
${DB_SERVER_DBNAME} 1>/dev/null
unset MYSQL_PWD
fi
}
update_zbx_config() {
echo "** Preparing Zabbix server configuration file"
ZBX_CONFIG=$ZABBIX_ETC_DIR/zabbix_server.conf
update_config_var $ZBX_CONFIG "ListenPort" "${ZBX_LISTENPORT}"
update_config_var $ZBX_CONFIG "SourceIP" "${ZBX_SOURCEIP}"
update_config_var $ZBX_CONFIG "LogType" "console"
update_config_var $ZBX_CONFIG "LogFile"
update_config_var $ZBX_CONFIG "LogFileSize"
update_config_var $ZBX_CONFIG "PidFile"
update_config_var $ZBX_CONFIG "DebugLevel" "${ZBX_DEBUGLEVEL}"
if [ -n "${ZBX_DBTLSCONNECT}" ]; then
update_config_var $ZBX_CONFIG "DBTLSConnect" "${ZBX_DBTLSCONNECT}"
update_config_var $ZBX_CONFIG "DBTLSCAFile" "${ZBX_DBTLSCAFILE}"
update_config_var $ZBX_CONFIG "DBTLSCertFile" "${ZBX_DBTLSCERTFILE}"
update_config_var $ZBX_CONFIG "DBTLSKeyFile" "${ZBX_DBTLSKEYFILE}"
update_config_var $ZBX_CONFIG "DBTLSCipher" "${ZBX_DBTLSCIPHER}"
update_config_var $ZBX_CONFIG "DBTLSCipher13" "${ZBX_DBTLSCIPHER13}"
fi
update_config_var $ZBX_CONFIG "DBHost" "${DB_SERVER_HOST}"
update_config_var $ZBX_CONFIG "DBName" "${DB_SERVER_DBNAME}"
update_config_var $ZBX_CONFIG "DBSchema" "${DB_SERVER_SCHEMA}"
update_config_var $ZBX_CONFIG "DBUser" "${DB_SERVER_ZBX_USER}"
update_config_var $ZBX_CONFIG "DBPort" "${DB_SERVER_PORT}"
update_config_var $ZBX_CONFIG "DBPassword" "${DB_SERVER_ZBX_PASS}"
update_config_var $ZBX_CONFIG "HistoryStorageURL" "${ZBX_HISTORYSTORAGEURL}"
update_config_var $ZBX_CONFIG "HistoryStorageTypes" "${ZBX_HISTORYSTORAGETYPES}"
update_config_var $ZBX_CONFIG "HistoryStorageDateIndex" "${ZBX_HISTORYSTORAGEDATEINDEX}"
update_config_var $ZBX_CONFIG "DBSocket" "${DB_SERVER_SOCKET}"
update_config_var $ZBX_CONFIG "StatsAllowedIP" "${ZBX_STATSALLOWEDIP}"
update_config_var $ZBX_CONFIG "StartPollers" "${ZBX_STARTPOLLERS}"
update_config_var $ZBX_CONFIG "StartIPMIPollers" "${ZBX_IPMIPOLLERS}"
update_config_var $ZBX_CONFIG "StartPollersUnreachable" "${ZBX_STARTPOLLERSUNREACHABLE}"
update_config_var $ZBX_CONFIG "StartTrappers" "${ZBX_STARTTRAPPERS}"
update_config_var $ZBX_CONFIG "StartPingers" "${ZBX_STARTPINGERS}"
update_config_var $ZBX_CONFIG "StartDiscoverers" "${ZBX_STARTDISCOVERERS}"
update_config_var $ZBX_CONFIG "StartHTTPPollers" "${ZBX_STARTHTTPPOLLERS}"
update_config_var $ZBX_CONFIG "StartPreprocessors" "${ZBX_STARTPREPROCESSORS}"
update_config_var $ZBX_CONFIG "StartTimers" "${ZBX_STARTTIMERS}"
update_config_var $ZBX_CONFIG "StartEscalators" "${ZBX_STARTESCALATORS}"
update_config_var $ZBX_CONFIG "StartAlerters" "${ZBX_STARTALERTERS}"
update_config_var $ZBX_CONFIG "StartTimers" "${ZBX_STARTTIMERS}"
update_config_var $ZBX_CONFIG "StartEscalators" "${ZBX_STARTESCALATORS}"
update_config_var $ZBX_CONFIG "StartLLDProcessors" "${ZBX_STARTLLDPROCESSORS}"
: ${ZBX_JAVAGATEWAY_ENABLE:="false"}
if [ "${ZBX_JAVAGATEWAY_ENABLE}" == "true" ]; then
update_config_var $ZBX_CONFIG "JavaGateway" "${ZBX_JAVAGATEWAY:-"zabbix-java-gateway"}"
update_config_var $ZBX_CONFIG "JavaGatewayPort" "${ZBX_JAVAGATEWAYPORT}"
update_config_var $ZBX_CONFIG "StartJavaPollers" "${ZBX_STARTJAVAPOLLERS:-"5"}"
else
update_config_var $ZBX_CONFIG "JavaGateway"
update_config_var $ZBX_CONFIG "JavaGatewayPort"
update_config_var $ZBX_CONFIG "StartJavaPollers"
fi
update_config_var $ZBX_CONFIG "StartVMwareCollectors" "${ZBX_STARTVMWARECOLLECTORS}"
update_config_var $ZBX_CONFIG "VMwareFrequency" "${ZBX_VMWAREFREQUENCY}"
update_config_var $ZBX_CONFIG "VMwarePerfFrequency" "${ZBX_VMWAREPERFFREQUENCY}"
update_config_var $ZBX_CONFIG "VMwareCacheSize" "${ZBX_VMWARECACHESIZE}"
update_config_var $ZBX_CONFIG "VMwareTimeout" "${ZBX_VMWARETIMEOUT}"
: ${ZBX_ENABLE_SNMP_TRAPS:="false"}
if [ "${ZBX_ENABLE_SNMP_TRAPS}" == "true" ]; then
update_config_var $ZBX_CONFIG "SNMPTrapperFile" "${ZABBIX_USER_HOME_DIR}/snmptraps/snmptraps.log"
update_config_var $ZBX_CONFIG "StartSNMPTrapper" "1"
else
update_config_var $ZBX_CONFIG "SNMPTrapperFile"
update_config_var $ZBX_CONFIG "StartSNMPTrapper"
fi
update_config_var $ZBX_CONFIG "HousekeepingFrequency" "${ZBX_HOUSEKEEPINGFREQUENCY}"
update_config_var $ZBX_CONFIG "MaxHousekeeperDelete" "${ZBX_MAXHOUSEKEEPERDELETE}"
update_config_var $ZBX_CONFIG "SenderFrequency" "${ZBX_SENDERFREQUENCY}"
update_config_var $ZBX_CONFIG "CacheSize" "${ZBX_CACHESIZE}"
update_config_var $ZBX_CONFIG "CacheUpdateFrequency" "${ZBX_CACHEUPDATEFREQUENCY}"
update_config_var $ZBX_CONFIG "StartDBSyncers" "${ZBX_STARTDBSYNCERS}"
update_config_var $ZBX_CONFIG "HistoryCacheSize" "${ZBX_HISTORYCACHESIZE}"
update_config_var $ZBX_CONFIG "HistoryIndexCacheSize" "${ZBX_HISTORYINDEXCACHESIZE}"
update_config_var $ZBX_CONFIG "TrendCacheSize" "${ZBX_TRENDCACHESIZE}"
update_config_var $ZBX_CONFIG "ValueCacheSize" "${ZBX_VALUECACHESIZE}"
update_config_var $ZBX_CONFIG "Timeout" "${ZBX_TIMEOUT}"
update_config_var $ZBX_CONFIG "TrapperTimeout" "${ZBX_TRAPPERIMEOUT}"
update_config_var $ZBX_CONFIG "UnreachablePeriod" "${ZBX_UNREACHABLEPERIOD}"
update_config_var $ZBX_CONFIG "UnavailableDelay" "${ZBX_UNAVAILABLEDELAY}"
update_config_var $ZBX_CONFIG "UnreachableDelay" "${ZBX_UNREACHABLEDELAY}"
update_config_var $ZBX_CONFIG "AlertScriptsPath" "/usr/lib/zabbix/alertscripts"
update_config_var $ZBX_CONFIG "ExternalScripts" "/usr/lib/zabbix/externalscripts"
if [ -n "${ZBX_EXPORTFILESIZE}" ]; then
update_config_var $ZBX_CONFIG "ExportDir" "$ZABBIX_USER_HOME_DIR/export/"
update_config_var $ZBX_CONFIG "ExportFileSize" "${ZBX_EXPORTFILESIZE}"
fi
update_config_var $ZBX_CONFIG "FpingLocation" "/usr/sbin/fping"
update_config_var $ZBX_CONFIG "Fping6Location"
update_config_var $ZBX_CONFIG "SSHKeyLocation" "$ZABBIX_USER_HOME_DIR/ssh_keys"
update_config_var $ZBX_CONFIG "LogSlowQueries" "${ZBX_LOGSLOWQUERIES}"
update_config_var $ZBX_CONFIG "StartProxyPollers" "${ZBX_STARTPROXYPOLLERS}"
update_config_var $ZBX_CONFIG "ProxyConfigFrequency" "${ZBX_PROXYCONFIGFREQUENCY}"
update_config_var $ZBX_CONFIG "ProxyDataFrequency" "${ZBX_PROXYDATAFREQUENCY}"
update_config_var $ZBX_CONFIG "SSLCertLocation" "$ZABBIX_USER_HOME_DIR/ssl/certs/"
update_config_var $ZBX_CONFIG "SSLKeyLocation" "$ZABBIX_USER_HOME_DIR/ssl/keys/"
update_config_var $ZBX_CONFIG "SSLCALocation" "$ZABBIX_USER_HOME_DIR/ssl/ssl_ca/"
update_config_var $ZBX_CONFIG "LoadModulePath" "$ZABBIX_USER_HOME_DIR/modules/"
update_config_multiple_var $ZBX_CONFIG "LoadModule" "${ZBX_LOADMODULE}"
update_config_var $ZBX_CONFIG "TLSCAFile" "${ZBX_TLSCAFILE}"
update_config_var $ZBX_CONFIG "TLSCRLFile" "${ZBX_TLSCRLFILE}"
update_config_var $ZBX_CONFIG "TLSCertFile" "${ZBX_TLSCERTFILE}"
update_config_var $ZBX_CONFIG "TLSCipherAll" "${ZBX_TLSCIPHERALL}"
update_config_var $ZBX_CONFIG "TLSCipherAll13" "${ZBX_TLSCIPHERALL13}"
update_config_var $ZBX_CONFIG "TLSCipherCert" "${ZBX_TLSCIPHERCERT}"
update_config_var $ZBX_CONFIG "TLSCipherCert13" "${ZBX_TLSCIPHERCERT13}"
update_config_var $ZBX_CONFIG "TLSCipherPSK" "${ZBX_TLSCIPHERPSK}"
update_config_var $ZBX_CONFIG "TLSCipherPSK13" "${ZBX_TLSCIPHERPSK13}"
update_config_var $ZBX_CONFIG "TLSKeyFile" "${ZBX_TLSKEYFILE}"
update_config_var $ZBX_CONFIG "TLSPSKIdentity" "${ZBX_TLSPSKIDENTITY}"
update_config_var $ZBX_CONFIG "TLSPSKFile" "${ZBX_TLSPSKFILE}"
if [ "$(id -u)" != '0' ]; then
update_config_var $ZBX_CONFIG "User" "$(whoami)"
else
update_config_var $ZBX_CONFIG "AllowRoot" "1"
fi
}
prepare_server() {
echo "** Preparing Zabbix server"
check_variables_mysql
check_db_connect_mysql
create_db_user_mysql
create_db_database_mysql
create_db_schema_mysql
update_zbx_config
}
#################################################
if [ "${1#-}" != "$1" ]; then
set -- /usr/sbin/zabbix_server "$@"
fi
if [ "$1" == '/usr/sbin/zabbix_server' ]; then
prepare_server
fi
exec "$@"
#################################################
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