Monitoring fails to open in Plesk: Grafana service is stopped

Symptoms

• When opening Monitoring in Plesk, it shows one of the following error messsages:

  PLESK_ERROR: PLESK_ERROR: The tab content cannot be loaded because the Grafana service is stopped. Start the service?

  PLESK_ERROR: Execution extension has failed with exit code 1, stdout: It seems that the extension installation is still in progress, so the "fix" command cannot be performed., stderr: .

  TPLESK_ERROR: The Grafana service is not installed. Fix it?

  PLESK_ERROR: Could not check if Monitoring was installed correctly: the Grafana service seems to be broken.

• When clicking Fix installation, the procedure fails with:

  PLESK_ERROR: Failed to copy files storage to destination path. stderr: filemng: Cannot open destination file '/etc/grafana/grafana.ini.dWXbAd' System error 2: No such file or directory stdout: filemng: Cannot open destination file '/etc/grafana/grafana.ini.dWXbAd' System error 2: No such file or directory

Cause

Grafana has been installed from grafana-enterprise package, which does not come with Plesk installation:

# rpm -qa | grep grafana
grafana-enterprise-7.0.0-1.x86_64

Resolution

1. Connect to the Plesk server via SSH.

2. Remove the Grafana package:

   # rpm -e --nodeps grafana-enterprise

3. Uninstall the Grafana extension:

   # plesk bin extension --uninstall grafana

4. Install it back:

   # plesk bin extension --install grafana

5. Log in to Plesk and go to Monitoring. If Grafana shows this message:

   PLESK_ERROR: The plesk-json-backend-datasource plugin is not installed.

   click Fix installation.