Hello folks,
As you may have noticed, we've had a lot of centos6-regression failures lately. The geo-replication failures are the new ones which particularly concern me. These failures have nothing to do with the test. The tests are exposing a problem in our infrastructure that we've carried around for a long time. Our machines are not clean machines that we automated. We setup automation on machines that were already created. At some point, we loaned machines for debugging. During this time, developers have inadvertently done 'make install' on the system to install onto system paths rather than into /build/install. This is what is causing the geo-replication tests to fail. I've tried cleaning the machines up several times with little to no success.
Last week, we decided to take an aggressive path to fix this problem. We planned to replace all our problematic nodes with new Centos 7 nodes. This exposed more problems. We expected a specific type of machine from Rackspace. These are no longer offered. Thus, our automation fails on some steps. I've spent this weekend tweaking our automation so that it works on the new Rackspace machines and I'm down to just one test failure[1]. I have a patch up to fix this failure[2]. As soon as that patch is merged, we can push forward with Centos7 nodes. In 4.0, we're dropping support for Centos 6, so this decision makes more sense to do sooner than later.
We'll not be lending machines anymore from production. We'll be creating new nodes which are a snapshots of an existing production node. This machine will be destroyed after use. This helps prevent this particular problem in the future. This also means that our machine capacity at all times is at 100 with very minimal wastage.
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nigelb
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