Results of monitoring of indexer in Grafana is empty

[shusterboris]

Dear colleagues!
I am new to Grafana. I tried to run Docker container as recommended here: https://github.com/OpenGrok/opengrok-monitoring-docker
It worked after adding fallback_scrape_protocol: 'PrometheusText0.0.4' to prometheus.yml and fixing data source in indexer dashboard. But indexer dashboard shows nothing even if indexer runs for 1 hour or more.
And does it work for you?