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Knowledge Base

Advanced Monitoring does not work: Panel plugin not found: graph

 
advanced monitoringadvanced monitoring extensionapplications extensionscentoscloudlinux

Symptoms

  • Graphs are not displayed in Advanced Monitoring, but the following error is shown:

    Panel plugin not found: graph


    The plesk-json-backend-datasource plugin is not installed

  • The following messages can be found in /var/log/grafana/grafana.log:

    lvl=eror msg="Request Completed" logger=context userId=0 orgId=0 uname= method=GET path=/login/generic_oauth status=500 remote_addr=127.0.0.1 time_ms=0 size=1766 referer="https://203.0.113.2:8443/modules/monitoring/index.php/index/main?context=extNavButton_monitoring_1"

    and

    lvl=eror msg="Failed to save invalid login attempt" logger=login err="attempt to write a readonly database"
    lvl=eror msg="Invalid username or password" logger=context error="Invalid Username or Password"

  • The following warning can be found in /var/log/plesk/panel.log when accessing Advanced Monitoring with debug mode enabled:

    WARN [extension/grafana] Dashboard update failed. ID: monitoring__network. Error: Invalid username or password

Cause

Corrupted Grafana installation.

Resolution

  1. Connect to the server via SSH

  2. Remove the Grafana extension:

    # plesk bin extension --uninstall grafana

  3. Remove the Advanced Monitoring extension:

    # plesk bin extension --uninstall monitoring

  4. Remove Grafana from the server:

    • For Debian or Ubuntu operating systems:

      # apt purge grafana && rm -rf /usr/share/grafana /etc/grafana /var/lib/grafana

    • For RHEL, CentOS or CloudLinux operating systems:

      # yum remove grafana && rm -rf /usr/share/grafana /etc/grafana /var/lib/grafana

  5. Reinstall the Grafana extension:

    # plesk bin extension --install grafana

    # plesk bin extension --install monitoring

  6. If the following error message is shown at Advanced Monitoring, press Fix installation button:
    inline778870369.png

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