Coder.comC
Coder.com•4mo ago•
2 replies
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sidecar in kubernetes template

hello, I just finished modifying this template (yes, I think it's a bit of dirty hack, but i guess it works)

My setup:
my server(coder in kubernetes k3s>traefik)>cloudflare tunnel. Usually with the default kubernetes templaet, everything was fine in the last couple of weeks, no issue.

goal: I'm trying to have a nodejs project that can be run/debug in realtime with coder
so my problem is:

it boot up just fine, I can access my "web" container through the "Poogle" button app, it works as expected. While i got my hope up, dev console was throwing wss 1006 and failed websocket like every 2s and agent unhealthy->crash. That happens like 1m after I'm just trying open some dir at /home/coder/breederpage-demo

upon checking with kubectl, I found this logs right after it crashed:
2025-09-24 06:34:33.067 [info]  coderd.agentrpc.yamux.stdlib: [ERR] yamux: keepalive failed: i/o deadline reached  owner=Decoyer  workspace_name=web-auto  agent_name=main  request_id=97eadba5-87c1-43e5-8748-1a46b15ae495
2025-09-24 06:34:33.067 [info]  coderd.agentrpc.yamux.stdlib: [ERR] yamux: Failed to read header: failed to get reader: context canceled  owner=Decoyer  workspace_name=web-auto  agent_name=main  request_id=97eadba5-87c1-43e5-8748-1a46b15ae495
2025-09-24 06:34:51.528 [erro]  coderd: encode containers  request_id=d4432e2b-843f-4698-81c9-cb21b4fafe68  error="failed to write msg: use of closed network connection"




at first I thought it was the issue between traefik<->cloudflare, but after update coder domain -> my server local ip (editing /etc/hosts), it still got the same issue, so here I am. My best guess is something has to be done between traefik<->coder?

this is as far as I can go debugging this issue, can someone help?
image.png
image.png
main.tf14.71KB
traefik.yaml3.15KB
coder.yaml15.74KB
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