Advanced Monitoring shows the following error in Plesk on Ubuntu 18/Debian 9: The tab content cannot be loaded because the Grafana service is stopped

Symptoms

• Advanced Monitoring shows the following error in Plesk on Ubuntu 18/Debian 9:

  The tab content cannot be loaded because the Grafana service is stopped

• The error appears on restart the service in the Plesk UI:

  An error occured while starting the Grafana service: Execution extension has failed with exit code 1, stdout: , stderr: [2021-10-08 12:00:00.345] 20651:615feb31a720a ERR [extension/grafana] Synchronous restart of the Grafana service failed: Grafana service failed to start Grafana service failed to start

• In attempts to start a service via CLI, an error is shown under /var/log/syslog and journalctl -u grafana-server:

  systemd[1]: /usr/lib/systemd/system/grafana-server.service:34: Unknown lvalue 'ProtectHostname' in section 'Service'
  systemd[1]: /usr/lib/systemd/system/grafana-server.service:35: Unknown lvalue 'ProtectKernelLogs' in section 'Service'
  systemd[1]: /usr/lib/systemd/system/grafana-server.service:38: Unknown lvalue 'ProtectProc' in section 'Service'

Cause

The issue is caused by the Grafana bug in the new package version 8.2.0: https://github.com/grafana/grafana/issues/40162.

It has been fixed in the version 8.2.1.

Resolution

Update Grafana packages to fix the issue:

1. Log into Plesk.

2. Go to Tools & Settings > Server Management section > System Updates and click Recheck Now.

3. Once updates are detected, click Update all.

   Note: if no available updates are detected, check the grafana version package in Tools & Settings > Server Management section > System Updates > All Packages. If Grafana version is 8.2.1 - no additional actions are required.