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by debarshri 1909 days ago
Building a platform to deploy stateless services are the easy part. This might even work nicely at a smaller scale. It is gets super complicated when you want to mount volumes, re-use those volumes. This is like a nice weekend project, contrarian in nature, but it is just not a replacement for kubernetes. This is some bash script orchestration on top of podman.

Bulk of complexity in opensource distro of kubernetes comes from the fact that everything is interface driven and has to work in an generic way. For example, you don't really have to implement cri-o like thing if you are opinionated platform and only supports docker. Similarly, you don't have to build CSI, if you only support ceph or aws' storage. I love the contrarian thought, but matter of the fact is modern orchestration platforms that want to be a general purpose platform is going to be big.

It is a really nice exercise however build something like this when you want to learn about networking, containers, orchestration, storage etc. and how to tied everything together.
1 comments
thomasbacklund 1909 days ago
Simplenetes does support state, no sweat. But it can't pull a disk out of the cloud for you, there is some traditional Ops involved.
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debarshri 1909 days ago
So, it can reschedule container if there is a continuous error state on a particular host it is deployed?
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thomasbacklund 1909 days ago
No, don't build the next Netflix on Simplenetes.

However, if you are just dealing with a three node cluster (Yes I know many of you are running tri-cycles with k8s stickers on it) then maybe it can be fine for many applications to not have a scheduler.

Simplenetes does however support multiple replicas of pods so if one node fails it can be OK.

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debarshri 1909 days ago
Simplenetes does not support volumes. Simplenetes does not support rescheduling containers.

Why do I need 17k lines shellscript to run my tri-cycles? I would rather recommend using docker swarm or just podman itself.

you are adding more complexity without to a very simple problem.

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thomasbacklund 1909 days ago
If you want something simpler and use podman you can try `podc` [1] which compiles a pod yaml spec into a single executable shell script with a nice managagement CLI api to it.

[1] https://github.com/simplenetes-io/podc

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