Re: Staging

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On 16/06/2020 00:53, Kevin Fenzi wrote:
Greetings everyone. 

As you hopefully know, we took down our old staging env in phx2 as part
of the datacenter move. Once machines from phx2 are shipped to iad2 and
racked and installed and setup we can look at re-enabling our staging
env. 

However, I'd like to ask everyone about how we want that to look. 

Some questions: 

* Before we had a staging openshift with staging applications in it.
This is sort of not how openshift is designed to work. In the ideal
openshift world you don't need staging, you just have enough tests and
CI and gradual rollout of new versions so everything just works. 
Granted a staging openshift cluster is useful to ops folks to test
upgrades and try out things, and it's useful for developers in our case
to get all the parts setup right in ansible to deploy their application. 
So, what do you think? should we setup a staging cluster as before?
Or shall we try and just use the one production cluster for staging and
prod?
For me the staging was helpful to synchronize changes when deploying Anitya and the-new-hotness (it has plenty of external systems to connect to), but I think if I would had better integration tests I don't need staging environment anymore (I have plans to rewrite the-new-hotness with clean architecture, which should help a lot with dependencies on external systems).

But it could be nice to create at least some kind of playground, where newcomers could try things without breaking anything. But we could have one namespace dedicated to this or allow use of communishift for this.

* Another question is openshift 4. Openshift 3.11 is supported until
june of 2022, so we have some time, but do we want to or need to look at
moving to openshift 4 for our clusters? One thing I hate about this is
that you must have 3 master nodes, and the only machines we have are big
powerfull virthost servers, so it's very wastefull of resources to
deploy a openshift 4 cluster (with the machines we have currently
anyhow). 
Yesterday I was working on CentOS OpenShift 4 instance and it's from user POV much more easier to use and much more comfortable and because CentOS CI team had it we already have knowledge in our team how to work with it. So I would be for using the OpenShift 4 if we are doing these breaking changes anyway.

* In our old staging env we had a subset of things. Some of them we used
the staging instances all the time, others we almost never did. I'm not
sure we have the resources to deploy a 100% copy of our prod env, but
assuming we did, where should we shoot for on the line? ie, between 100%
duplicate of prod or nothing? 

* We came up with a pretty elaborate koji sync from prod->staging. There
were lots of reasons we got to that, but I suppose if someone wants to
propose another method of doing this we could revisit that. 

* Any other things we definitely want from a staging env? 
As I wrote above, some kind of playground would be nice.

* Has staging been helpful to you?
It helped me a lot with Anitya and the-new-hotness, but as I said the better integration tests should solve most of those issues.

* Is there anything we could do to make it better?

Thoughts?

kevin

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