github_exporter: fields mismatch between exporter and dashboards

[ahpook]

What's wrong?

When adding the github_exporter integration to the agent and installing the bundled dashboards, the Open Pull Requests dashboard is empty. This is because the query for the metrics is filtering on fields user and repo (i.e. github_repo_pull_request_count{user="grafana",repo="agent"}) but the metric is not exported into prometheus with a user field.

It looks like the dashboard end of things expects the change in this PR to exist in the data model, but the exporter is not updated to add that key. Maybe this is a result of #5289 ?

Steps to reproduce

• Install the GitHub integration as described in the docs
• Note the Open Pull Requests table is empty
• Edit the dashboard and using the data explorer, browse to the github_repo_pull_request_count metric, and note the only filterable field on it is repo.
• Remove the user=$user filter from the query and note the data now shows up correctly.

As an aside there are additional metrics that would be great to have in this integration (as #1845 mentioned), but it's very unclear where to put a PR right now

System information

No response

Software version

grafana-agent-0.37.2-1

Configuration

integrations:
  prometheus_remote_write:
  - basic_auth:
      password: glc_XXX
      username: 111
    url: https://prometheus-prod-36-prod-us-west-0.grafana.net/api/prom/push
  agent:
    enabled: true
    relabel_configs:
    - action: replace
      source_labels:
      - agent_hostname
      target_label: instance
    - action: replace
      target_label: job
      replacement: "integrations/agent-check"
    metric_relabel_configs:
    - action: keep
      regex: (prometheus_target_.*|prometheus_sd_discovered_targets|agent_build.*|agent_wal_samples_appended_total|process_start_time_seconds)
      source_labels:
      - __name__
  github_exporter:
    enabled: true
    api_token: 'github_pat_XXX'
    repositories:
    - cli/cli
    relabel_configs:
    - replacement: 'ahpook-test'
      target_label: instance
    metric_relabel_configs:
    - action: keep
      regex: github_rate_limit|github_rate_remaining|github_repo_forks|github_repo_open_issues|github_repo_pull_request_count|github_repo_size_kb|github_repo_stars|github_repo_watchers
      source_labels:
      - __name__

Logs

No response

[marctc]

@ahpook thanks for reporting! Indeed this is a problem after switching to the original fork. I pinged the maintainer of the repo to see if we can merge that PR.

[ahpook]

@marctc thanks for the quick turnaround on this!