this post was submitted on 25 Oct 2023
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Migrating from multiple docker-compose VPS to Kubernetes (alien.top)
submitted 1 year ago by hardyrekshin@alien.top to c/main@selfhosted.forum
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Almost 3 years ago, I paid for a few VPSs on which I host a variety of services. (Vaultwarden, gitea, drone, meshcentral, metabase, gptresearcher, etc)

Interspersed among the VPSs are a series of data processing containers to handle crypto data.

With the contract coming up for renewal, I'm exploring how to separate the hardware from the software so I'd only need to deploy the container to a pool of servers, and the infrastructure decides on which server to run the container, correctly route incoming requests, and update cloudflare dns for containers which are meant to be oublicly facing.

I went through the kubernetes the hard way tutorial and have a cursory understanding of kubernetes but with some substantial gaps which I couldn't Google away.

For the replacement platform, I'm thinking to:

- Combine multiple VPSs as a baseline cluster to run internet-facing loads

- Use some home servers for backend/non-internet facing processes and make the data available on the Internet facing hosts.

- Add the ability to dynamically add more VPSs or preemptible instances from GCP/AWS

I'm still stuck on the first part. Standing up a kubernetes cluster using multiple VPS with different public IPV4 addresses.

Googling around heavily suggests this is not a common use case. Or at least I'm not using the correct terms.

Is there a better solution for me to pursue?

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[โ€“] hardyrekshin@alien.top 1 points 1 year ago (1 children)

What's your take on inter-cluster communication?

E.g. I could hypothetically have 3 clusters:

  1. Administrative
  2. Web-Facing
  3. Backend

Potential use cases:

  • Backend might produce updated parquet files which needs to be transferred and made accessible on metabase in the Web-Facing cluster.
  • Web-Facing might need to send batched inputs (from webhooks for example) to Backend for processing.
[โ€“] ionfury@alien.top 1 points 1 year ago

Service mesh is what you're looking for here. Istio is a front runner in this space.

Without knowing more of your use case though multi cluster is really adding a lot of complexity here and I'm not sure what you're getting over, say, namespaces and network policy.