This KB explains what you need todo to import metrics from another SwarmTelemetry VM.
First you need to backup the metrics data in the customer environment, this means you will need the following data:
tar cvzf prometheus-state-ddmmyyyy.tgz /var/lib/prometheus/* /etc/prometheus/prometheus.yml /usr/lib/systemd/system/prometheus.service
The reason you need a copy of the prometheus systemd script is because it determines the database storage location as well as the data retention policy of the customer ( default its 15 days )
--storage.tsdb.path=/var/lib/prometheus/data
--storage.tsdb.retention.time=15d
Note: Prometheus itself does not need to be scraping any targets as you just want to read historical data, so make sure /etc/prometheus/prometheus.yml has no job definitions. You can double check the syntax of the file is correct by running promtool check config /etc/prometheus/prometheus.yml
To restore the metrics on another SwarmTelemetry VM, you simply need to do the following:
systemctl stop prometheus # You dont need the old metrics data rm -rf /var/lib/prometheus cd / tar xvzf prometheus-state-ddmmyyyy.tgz chown -R prometheus. /var/lib/prometheus systemctl daemon-reload prometheus systemctl start prometheus
If you now access grafana you should see the old metrics on the dashboards, you will have to change the date range since it will be somewhere in the past. I would set the range to 30days first then use the mouse to select the start and end of the data in one of the historical charts so that your date range ends up specifying exactly where in time the data is. Example
Note: Keep in mind its important to have the right version of grafana as our latest dashboards are specific to grafana 9.x and above
That’s it.