Kubernetes readwritemany (or the same effect)
I’ve been using compose for years - k8s for days. I’m building a specialized app on DO k8s and it’s going great.
Thinking ahead, though, I’d like to use DO k8s for our entire infrastructure. We have hundreds of hosted client sites, “common” stuff - there’s a lot of legacy WordPress, but the newer ones are OctoberCMS, Gatsby, React+Headless.
[I’m thinking out loud a little here, bit still mostly looking for advice/help]
I’d like to run all that here, but I have some bumps to get over first:
the DO storageclass is readwriteonce. So what happens if a WP site scales? Its uploads directory isn’t in the image, of course, so it’s lost? Can we use a different storageclass that persists, or is there some way (very doubtful) to have a volume readwriteonce by a “master” and readonlymany by others? …or maybe an initContainer that pulls the files from a central locale?
This loosely ties into another concern re: initial deployment. Dev happens in a local environment, and deploy involves a one-time ssh/ftp of site-specific files (theme, plugins, imgs, etc). Nodes - naturally - have no direct access, so… I’m lost there. (but the initContainer idea I spitballed above may fix it?)
I would be okay with building a new image for all updates, but a fair amount of work is done by non-tech. My options there are a) pull all admin/updates into tech dept. or b) train design/content departments on building a docker imagine and pushing to a private registry. Both are equally terrifying lol.