Page MenuHomePhabricator

Maps - move traffic to eqiad instead of codfw
Closed, ResolvedPublic


Now that the maps eqiad cluster is ready, it is time to actually send traffic there after some validation that this cluster is working correctly.

This requires at least:

  • adding the kartotherian eqiad as a backend to varnish
  • changing cache routing to eqiad -> direct and codf -> eqiad (this needs to be done in 2 separate commits)
  • since tile generation is more recent on eqiad, we might need a full cache purge to ensure coherence of tiles (@Yurik can you confirm?)

@BBlack : I'm probably missing steps in the above plan, could you check?

Related Objects

Event Timeline

I suspect that both databases / tilesets are fairly similar. Then again, we had some job scheduling issue recently, so maybe we should do a full maps cache flush just to be sure - but this will cause a big spike on the servers, especially right after the switchover). As one of the cache flushing option, we could flush one zoom level at a time.

completed today?

Yes, there was an unplanned incident with the codfw karthotherian service and we accelerated the move to cope.

Resolved during maps incident as pointed out by @BBlack.