We need to test that php 7.2 and php 7.4 can coexist safely in deplopyment-prep. To this end we need to:
- Install an appserver with both
- Install a jobrunner with both
- Install both on the deployment server. This is a good oppportunity to test stages of scap that need php.
- Install on the maintenance server, test some periodic scripts
- Install on a dumps test server, run tests. T295580
For configuration of changeprop, there is https://wikitech.wikimedia.org/wiki/Changeprop#To_deployment-prep but the steps described there don't seem to generate a valid configuration currently.
And we should test basic functionality on all of those.