Verify that grafana autoupdates are deploying correctly

[madwort]

• Bump grafana/grafana-enterprise from 797dc82 to ca667dd in /grafana #49 was correctly tested & auto-merged, but the deployment process did not run - in general the Grafana deployment job has been running on branches but not on the merge to main.
• @madwort noticed that the deployment process appeared to have run correctly before fix: also run grafana workflow when we change the workflow #35 but not afterwards, so reverted it Revert "fix: also run grafana workflow when we change the workflow" #58 & did a follow-up test chore: reword docs #59 which did then deploy correctly
• it's a bit unclear why this should be happening, or whether this was the correct fix
• BLOCKED waiting until the next dependabot auto-update & see what happens then

[madwort]

auto-update PR was merged #75 last week, but it looks like the workflow didn't run on the merge to main

[madwort]

see also #87

[madwort]

manually deployed the update in #75 https://github.com/ebmdatalab/metrics/actions/runs/7399781682

[madwort]

as far as I can see, the GHA workflows in this repo (inc. the other tests) do not always run after the merge to main, and the GHA docs don't have much to say about it - I think they do if there's a merge commit but they don't if it applies cleanly. weirdly, I /thought/ there was a repo setting (something to the effect of "always re-run CI on main after merging a PR") but I just had a look & can't find anything like that here & now :/ I think we can easily widen the parameters in the on: section of the grafana deployment GHA to ensure that it runs, but then we're back to the previous issue that the deployment returns an error if there is no new version of grafana to deploy (which is most of the time).

[madwort]

hmm, maybe a weekly trigger would do the job

[madwort]

@lucyb I've removed myself from this ticket, as I think it's your team's responsibility now - hope that's ok?

(our team is still on deck-scrubbing, so I could potentially still pitch in if you need)

[lucyb]

Thanks @madwort . Yes, you're right that it's now a team rex responsibility. I'll try to take a look next week, although I may well pick your brains about it, if that's okay.

[lucyb]

There's an example here: https://github.com/ebmdatalab/metrics/actions/runs/7570488663

[lucyb]

After some further investigation and no good solution in sight, I've moved us to doing manual deploys of grafana changes.
See #100