GitLab reconfigure/upgrade error - Reading unsupported config value grafana

Description

GitLab reconfigure/upgrade fails with errors:

There was an error running gitlab-ctl reconfigure:

Reading unsupported config value grafana.

FATAL: Mixlib::Config::UnknownConfigOptionError: Reading unsupported config value grafana.

Environment

Impacted offerings:

• GitLab Self-Managed

Impacted versions:

• 16.3 and later

Solution

• Remove all references to grafana in your configuration
  • e.g. grafana["enable"]

Cause

• Bundled Grafana was removed in 16.3

Related Links

• Bundled Grafana deprecated and disabled
• GitLab 16 changes - Linux package installations
• Presence of grafana keys in gitlab.rb prevents upgrade