I configured Zabbix server and Zabbix frontend to store history values on Elasticsearch (trends still stored in DB).

When I display any graph, even on large period (> history storage period), I only see history values (from Elasticsearch). There is no trend value displayed, even if I set graph period to see only trends values.

I have checked the DB trends table and I could find many trends values stored by Zabbix server.

Here is my zabbix.conf.php :

---------------------------------------------------------------------------------

global $DB, $HISTORY;

$DB['TYPE'] = 'POSTGRESQL';
$DB['SERVER'] = 'pgzbx';
$DB['PORT'] = '5432';
$DB['DATABASE'] = 'zabbix';
$DB['USER'] = 'zbxpguser';
$DB['PASSWORD'] = 'zbxpgpwd';
$DB['SCHEMA'] = '';

$HISTORY['url'] = 'http://xxxx:xxxx@xxxxx:9200';
$HISTORY['types'] = ['str', 'text', 'log', 'dbl','uint'];

$ZBX_SERVER = 'zabsrv';
$ZBX_SERVER_PORT = '10051';
$ZBX_SERVER_NAME = 'zabsrv';

$IMAGE_FORMAT_DEFAULT = IMAGE_FORMAT_PNG;

---------------------------------------------------------------------------------

Now, if I change frontend config to declare only DB like this :

---------------------------------------------------------------------------------

global $DB;

$DB['TYPE'] = 'POSTGRESQL';
$DB['SERVER'] = 'pgzbx';
$DB['PORT'] = '5432';
$DB['DATABASE'] = 'zabbix';
$DB['USER'] = 'zbxpguser';
$DB['PASSWORD'] = 'zbxpgpwd';
$DB['SCHEMA'] = '';

$ZBX_SERVER = 'zabsrv';
$ZBX_SERVER_PORT = '10051';
$ZBX_SERVER_NAME = 'zabsrv';

$IMAGE_FORMAT_DEFAULT = IMAGE_FORMAT_PNG;

---------------------------------------------------------------------------------

I can see all DB trends in the graph but I cannot see history values (which is totally expected in this case).

I suppose that there is a mistake on Zabbix frontend to retrieve and display all history/trend on graph when Elasticsearch has been declared on frontend config.

May I have done something wrong inf my Zabbix frontend config ?