zabbix-docker/web-nginx-pgsql/alpine/docker-entrypoint.sh
2020-09-11 10:19:33 -04:00

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#!/bin/bash
set -o pipefail
set +e
# Script trace mode
if [ "${DEBUG_MODE}" == "true" ]; then
set -o xtrace
fi
# Default Zabbix installation name
# Used only by Zabbix web-interface
ZBX_SERVER_NAME=${ZBX_SERVER_NAME:-"Zabbix docker"}
# Default Zabbix server host
ZBX_SERVER_HOST=${ZBX_SERVER_HOST:-"zabbix-server"}
# Default Zabbix server port number
ZBX_SERVER_PORT=${ZBX_SERVER_PORT:-"10051"}
# Default timezone for web interface
PHP_TZ=${PHP_TZ:-"Europe/Riga"}
#Enable PostgreSQL timescaleDB feature:
ENABLE_TIMESCALEDB=${ENABLE_TIMESCALEDB:-"false"}
# Default directories
# User 'zabbix' home directory
ZABBIX_USER_HOME_DIR="/var/lib/zabbix"
# Configuration files directory
ZABBIX_ETC_DIR="/etc/zabbix"
# Web interface www-root directory
ZBX_FRONTEND_PATH="/usr/share/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"
}
# Check prerequisites for PostgreSQL database
check_variables() {
file_env POSTGRES_USER
file_env POSTGRES_PASSWORD
: ${DB_SERVER_HOST:="postgres-server"}
: ${DB_SERVER_PORT:="5432"}
: ${CREATE_ZBX_DB_USER:="false"}
DB_SERVER_ROOT_USER=${POSTGRES_USER:-"postgres"}
DB_SERVER_ROOT_PASS=${POSTGRES_PASSWORD:-""}
DB_SERVER_ZBX_USER=${POSTGRES_USER:-"zabbix"}
DB_SERVER_ZBX_PASS=${POSTGRES_PASSWORD:-"zabbix"}
: ${DB_SERVER_SCHEMA:="public"}
DB_SERVER_DBNAME=${POSTGRES_DB:-"zabbix"}
}
check_db_connect() {
echo "********************"
echo "* DB_SERVER_HOST: ${DB_SERVER_HOST}"
echo "* DB_SERVER_PORT: ${DB_SERVER_PORT}"
echo "* DB_SERVER_DBNAME: ${DB_SERVER_DBNAME}"
echo "* DB_SERVER_SCHEMA: ${DB_SERVER_SCHEMA}"
if [ "${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: ${DB_SERVER_ZBX_PASS}"
fi
echo "********************"
if [ "${USE_DB_ROOT_USER}" != "true" ]; then
DB_SERVER_ROOT_USER=${DB_SERVER_ZBX_USER}
DB_SERVER_ROOT_PASS=${DB_SERVER_ZBX_PASS}
fi
if [ -n "${DB_SERVER_ZBX_PASS}" ]; then
export PGPASSWORD="${DB_SERVER_ZBX_PASS}"
fi
WAIT_TIMEOUT=5
if [ -n "${DB_SERVER_SCHEMA}" ]; then
PGOPTIONS="--search_path=${DB_SERVER_SCHEMA}"
export PGOPTIONS
fi
if [ -n "${ZBX_DBTLSCONNECT}" ]; then
export PGSSLMODE=${ZBX_DBTLSCONNECT//_/-}
export PGSSLROOTCERT=${ZBX_DBTLSCAFILE}
export PGSSLCERT=${ZBX_DBTLSCERTFILE}
export PGSSLKEY=${ZBX_DBTLSKEYFILE}
fi
while [ ! "$(psql --host ${DB_SERVER_HOST} --port ${DB_SERVER_PORT} --username ${DB_SERVER_ROOT_USER} --dbname ${DB_SERVER_DBNAME} --list --quiet 2>/dev/null)" ]; do
echo "**** PostgreSQL server is not available. Waiting $WAIT_TIMEOUT seconds..."
sleep $WAIT_TIMEOUT
done
unset PGPASSWORD
unset PGOPTIONS
unset PGSSLMODE
unset PGSSLROOTCERT
unset PGSSLCERT
unset PGSSLKEY
}
prepare_web_server() {
NGINX_CONFD_DIR="/etc/nginx/conf.d"
NGINX_SSL_CONFIG="/etc/ssl/nginx"
echo "** Adding Zabbix virtual host (HTTP)"
if [ -f "$ZABBIX_ETC_DIR/nginx.conf" ]; then
ln -s "$ZABBIX_ETC_DIR/nginx.conf" "$NGINX_CONFD_DIR"
else
echo "**** Impossible to enable HTTP virtual host"
fi
if [ -f "$NGINX_SSL_CONFIG/ssl.crt" ] && [ -f "$NGINX_SSL_CONFIG/ssl.key" ] && [ -f "$NGINX_SSL_CONFIG/dhparam.pem" ]; then
echo "** Enable SSL support for Nginx"
if [ -f "$ZABBIX_ETC_DIR/nginx_ssl.conf" ]; then
ln -s "$ZABBIX_ETC_DIR/nginx_ssl.conf" "$NGINX_CONFD_DIR"
else
echo "**** Impossible to enable HTTPS virtual host"
fi
else
echo "**** Impossible to enable SSL support for Nginx. Certificates are missed."
fi
}
prepare_zbx_web_config() {
echo "** Preparing Zabbix frontend configuration file"
PHP_CONFIG_FILE="/etc/php7/php-fpm.d/zabbix.conf"
if [ "$(id -u)" == '0' ]; then
echo "user = zabbix" >> "$PHP_CONFIG_FILE"
echo "group = zabbix" >> "$PHP_CONFIG_FILE"
echo "listen.owner = nginx" >> "$PHP_CONFIG_FILE"
echo "listen.group = nginx" >> "$PHP_CONFIG_FILE"
fi
export ZBX_DENY_GUI_ACCESS=${ZBX_DENY_GUI_ACCESS:-"false"}
export ZBX_GUI_ACCESS_IP_RANGE=${ZBX_GUI_ACCESS_IP_RANGE:-"['127.0.0.1']"}
export ZBX_GUI_WARNING_MSG=${ZBX_GUI_WARNING_MSG:-"Zabbix is under maintenance."}
export ZBX_MAXEXECUTIONTIME=${ZBX_MAXEXECUTIONTIME:-"600"}
export ZBX_MEMORYLIMIT=${ZBX_MEMORYLIMIT:-"128M"}
export ZBX_POSTMAXSIZE=${ZBX_POSTMAXSIZE:-"16M"}
export ZBX_UPLOADMAXFILESIZE=${ZBX_UPLOADMAXFILESIZE:-"2M"}
export ZBX_MAXINPUTTIME=${ZBX_MAXINPUTTIME:-"300"}
export PHP_TZ=${PHP_TZ:-"Europe/Riga"}
export DB_SERVER_TYPE="POSTGRESQL"
export DB_SERVER_HOST=${DB_SERVER_HOST}
export DB_SERVER_PORT=${DB_SERVER_PORT}
export DB_SERVER_DBNAME=${DB_SERVER_DBNAME}
export DB_SERVER_SCHEMA=${DB_SERVER_SCHEMA}
export DB_SERVER_USER=${DB_SERVER_ZBX_USER}
export DB_SERVER_PASS=${DB_SERVER_ZBX_PASS}
export ZBX_SERVER_HOST=${ZBX_SERVER_HOST}
export ZBX_SERVER_PORT=${ZBX_SERVER_PORT:-"10051"}
export ZBX_SERVER_NAME=${ZBX_SERVER_NAME}
export ZBX_DB_ENCRYPTION=${ZBX_DB_ENCRYPTION:-"false"}
export ZBX_DB_KEY_FILE=${ZBX_DB_KEY_FILE}
export ZBX_DB_CERT_FILE=${ZBX_DB_CERT_FILE}
export ZBX_DB_CA_FILE=${ZBX_DB_CA_FILE}
export ZBX_DB_VERIFY_HOST=${ZBX_DB_VERIFY_HOST-"false"}
export DB_DOUBLE_IEEE754=${DB_DOUBLE_IEEE754:-"true"}
export ZBX_HISTORYSTORAGEURL=${ZBX_HISTORYSTORAGEURL}
export ZBX_HISTORYSTORAGETYPES=${ZBX_HISTORYSTORAGETYPES:-"[]"}
if [ -n "${ZBX_SESSION_NAME}" ]; then
cp "$ZBX_WWW_ROOT/include/defines.inc.php" "/tmp/defines.inc.php_tmp"
sed "/ZBX_SESSION_NAME/s/'[^']*'/'${ZBX_SESSION_NAME}'/2" "/tmp/defines.inc.php_tmp" > "$ZBX_WWW_ROOT/include/defines.inc.php"
rm -f "/tmp/defines.inc.php_tmp"
fi
if [ "${ENABLE_WEB_ACCESS_LOG:-"true"}" == "false" ]; then
sed -ri \
-e 's!^(\s*access_log).+\;!\1 off\;!g' \
"/etc/nginx/nginx.conf"
sed -ri \
-e 's!^(\s*access_log).+\;!\1 off\;!g' \
"/etc/zabbix/nginx.conf"
sed -ri \
-e 's!^(\s*access_log).+\;!\1 off\;!g' \
"/etc/zabbix/nginx_ssl.conf"
fi
}
#################################################
echo "** Deploying Zabbix web-interface (Nginx) with PostgreSQL database"
check_variables
check_db_connect
prepare_web_server
prepare_zbx_web_config
echo "########################################################"
if [ "$1" != "" ]; then
echo "** Executing '$@'"
exec "$@"
elif [ -f "/usr/bin/supervisord" ]; then
echo "** Executing supervisord"
exec /usr/bin/supervisord -c /etc/supervisor/supervisord.conf
else
echo "Unknown instructions. Exiting..."
exit 1
fi
#################################################