zabbix-docker/Dockerfiles/web-apache-mysql/alpine/conf/etc/zabbix/web/zabbix.conf.php

<?php
// Zabbix GUI configuration file.
global $DB, $HISTORY;

$DB['TYPE']     = getenv('DB_SERVER_TYPE');
$DB['SERVER']   = getenv('DB_SERVER_HOST');
$DB['PORT']     = getenv('DB_SERVER_PORT');
$DB['DATABASE'] = getenv('DB_SERVER_DBNAME');
$DB['USER']     = (! getenv('VAULT_TOKEN') || ! getenv('ZBX_VAULTURL')) ? getenv('DB_SERVER_USER') : '';
$DB['PASSWORD'] = (! getenv('VAULT_TOKEN') || ! getenv('ZBX_VAULTURL')) ? getenv('DB_SERVER_PASS') : '';

// Schema name. Used for PostgreSQL.
$DB['SCHEMA'] = getenv('DB_SERVER_SCHEMA');

if (getenv('ZBX_SERVER_HOST')) {
    $ZBX_SERVER      = getenv('ZBX_SERVER_HOST');
    $ZBX_SERVER_PORT = getenv('ZBX_SERVER_PORT');
}
$ZBX_SERVER_NAME = getenv('ZBX_SERVER_NAME');

// Used for TLS connection.
$DB['ENCRYPTION']		= getenv('ZBX_DB_ENCRYPTION') == 'true' ? true: false;
$DB['KEY_FILE']			= getenv('ZBX_DB_KEY_FILE');
$DB['CERT_FILE']		= getenv('ZBX_DB_CERT_FILE');
$DB['CA_FILE']			= getenv('ZBX_DB_CA_FILE');
$DB['VERIFY_HOST']		= getenv('ZBX_DB_VERIFY_HOST') == 'true' ? true: false;
$DB['CIPHER_LIST']		= getenv('ZBX_DB_CIPHER_LIST') ? getenv('ZBX_DB_CIPHER_LIST') : '';

// Vault configuration. Used if database credentials are stored in Vault secrets manager.
$DB['VAULT_URL']		= getenv('ZBX_VAULTURL');
$DB['VAULT_DB_PATH']		= getenv('ZBX_VAULTDBPATH');
$DB['VAULT_TOKEN']		= getenv('VAULT_TOKEN');

// Use IEEE754 compatible value range for 64-bit Numeric (float) history values.
// This option is enabled by default for new Zabbix installations.
// For upgraded installations, please read database upgrade notes before enabling this option.
$DB['DOUBLE_IEEE754']	= getenv('DB_DOUBLE_IEEE754') == 'true' ? true: false;


$IMAGE_FORMAT_DEFAULT	= IMAGE_FORMAT_PNG;

// Elasticsearch url (can be string if same url is used for all types).
$history_url = str_replace("'","\"",getenv('ZBX_HISTORYSTORAGEURL'));
$HISTORY['url']   = (json_decode($history_url)) ? json_decode($history_url, true) : $history_url;
// Value types stored in Elasticsearch.
$storage_types = str_replace("'","\"",getenv('ZBX_HISTORYSTORAGETYPES'));

$HISTORY['types'] = (json_decode($storage_types)) ? json_decode($storage_types, true) : array();

// Used for SAML authentication.
$SSO['SP_KEY']			= file_exists('/etc/zabbix/web/certs/sp.key') ? '/etc/zabbix/web/certs/sp.key' : (file_exists(getenv('ZBX_SSO_SP_KEY')) ? getenv('ZBX_SSO_SP_KEY') : '');
$SSO['SP_CERT']			= file_exists('/etc/zabbix/web/certs/sp.crt') ? '/etc/zabbix/web/certs/sp.crt' : (file_exists(getenv('ZBX_SSO_SP_CERT')) ? getenv('ZBX_SSO_SP_CERT') : '');
$SSO['IDP_CERT']		= file_exists('/etc/zabbix/web/certs/idp.crt') ? '/etc/zabbix/web/certs/idp.crt' : (file_exists(getenv('ZBX_SSO_IDP_CERT')) ? getenv('ZBX_SSO_IDP_CERT') : '');

$sso_settings = str_replace("'","\"",getenv('ZBX_SSO_SETTINGS'));
$SSO['SETTINGS']		= (json_decode($sso_settings)) ? json_decode($sso_settings, true) : array();