Hey hey, I am trying to run k3 in a

Hey hey, I am trying to run k3 in a container, with the following:

# syntax=docker/dockerfile:1
FROM rancher/k3s:latest

# Expose the required ports for K3s
EXPOSE 6443
EXPOSE 443
EXPOSE 80

# Set the default command to run K3s server
CMD ["server", "--disable", "traefik"]

# syntax=docker/dockerfile:1
FROM rancher/k3s:latest

# Expose the required ports for K3s
EXPOSE 6443
EXPOSE 443
EXPOSE 80

# Set the default command to run K3s server
CMD ["server", "--disable", "traefik"]

And this is my code:

export class MyContainer extends Container {
  defaultPort = 6443;
  requiredPorts = [6443, 443, 80];
  // ...
}

app.get("/readyz", async (c) => {
  const container = getContainer(c.env.MY_CONTAINER);
  return await container.fetch(c.req.raw);
});
// ...

export class MyContainer extends Container {
  defaultPort = 6443;
  requiredPorts = [6443, 443, 80];
  // ...
}

app.get("/readyz", async (c) => {
  const container = getContainer(c.env.MY_CONTAINER);
  return await container.fetch(c.req.raw);
});
// ...

I get the following:

⎔ Container image(s) ready
⎔ Starting local server...
✘ [ERROR] Error checking if container is ready: connect(): Connection refused: container port not found. Make sure you exposed the port in your container definition.
✘ [ERROR] Error checking if container is ready: internal error; reference = r48029i07cer86vit2h90t6i
✘ [ERROR] Error checking if container is ready: internal error; reference = df2ceaqdffenqqhpp6ka9igg
✘ [ERROR] Error checking if container is ready: internal error; reference = gist59tegar22c3tp1iaj7ac
✘ [ERROR] Error checking if container is ready: connect(): Connection refused: container port not found. Make sure you exposed the port in your container definition.
Container error: [Error: Container exited with unexpected exit code: 1] { exitCode: 1 }
▲ [WARNING] workerd/io/actor-sqlite.c++:647: warning: NOSENTRY SQLite alarm handler canceled with requestScheduledAlarm.; scheduledTime = 1753139731.815s; localAlarmState.orDefault(kj::UNIX_EPOCH) = 1753139733.074s; actorId = b60d370ee54d17e273624ceb809e666d47bc8cb445b274c648f7e06520b5a613
[wrangler:info] GET /readyz 500 Internal Server Error

⎔ Container image(s) ready
⎔ Starting local server...
✘ [ERROR] Error checking if container is ready: connect(): Connection refused: container port not found. Make sure you exposed the port in your container definition.
✘ [ERROR] Error checking if container is ready: internal error; reference = r48029i07cer86vit2h90t6i
✘ [ERROR] Error checking if container is ready: internal error; reference = df2ceaqdffenqqhpp6ka9igg
✘ [ERROR] Error checking if container is ready: internal error; reference = gist59tegar22c3tp1iaj7ac
✘ [ERROR] Error checking if container is ready: connect(): Connection refused: container port not found. Make sure you exposed the port in your container definition.
Container error: [Error: Container exited with unexpected exit code: 1] { exitCode: 1 }
▲ [WARNING] workerd/io/actor-sqlite.c++:647: warning: NOSENTRY SQLite alarm handler canceled with requestScheduledAlarm.; scheduledTime = 1753139731.815s; localAlarmState.orDefault(kj::UNIX_EPOCH) = 1753139733.074s; actorId = b60d370ee54d17e273624ceb809e666d47bc8cb445b274c648f7e06520b5a613
[wrangler:info] GET /readyz 500 Internal Server Error

Any idea what could be the issue? 🤔

13 Replies

AsterOP•2mo ago

Checking with another test container: https://github.com/stefanprodan/podinfo It seems like it doesn't like to expose several ports 🤔 When I restrict the container to 1 port, my podinfo works When retrying with k3s, but exposing only 1 port EXPOSE 6443, I get a [Error: Container exited with unexpected exit code: 137] when hitting the /readyz endpoint ^^ After bumping the container to use "instance_type": "standard" I know get a beautiful [Error: Container exited with unexpected exit code: 1] { exitCode: 1 } error 😅

AsterOP•2mo ago

Hum maybe I need to wait for bigger instances 😦 https://docs.k3s.io/installation/requirements#hardware

Requirements | K3s

K3s is very lightweight, but has some minimum requirements as outlined below.

Unknown User•2mo ago

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peterp•2mo ago

We have the same issue - the problem seems to be when exposing multiple ports

つんでれd•2mo ago

Hmm strange. I have exposed multiple ports on my containerized application and working fine for now.

peterp•2mo ago

Downgrading to Vite 6, from 7, appears to have resolved this

Unknown User•2mo ago

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つんでれd•2mo ago

I run a Bun server like this in container.

Bun.serve({
    async fetch(request, server) {
        return new Response('Hello World');
    },

    port: 8081
});

Bun.serve({
    async fetch(request, server) {
        return new Response('Hello World from 8080');
    },
    
    port: 8080
});

Bun.serve({
    async fetch(request, server) {
        return new Response('Hello World');
    },

    port: 8081
});

Bun.serve({
    async fetch(request, server) {
        return new Response('Hello World from 8080');
    },
    
    port: 8080
});

with this Dockerfile:

FROM oven/bun:latest

COPY container-src ./

RUN bun install

CMD ["bun", "index.ts"]

EXPOSE 8080 8081

FROM oven/bun:latest

COPY container-src ./

RUN bun install

CMD ["bun", "index.ts"]

EXPOSE 8080 8081

My @cloudflare/containers package is latest as well, and using wrangler dev to run it locally. I can't confirm K3s is working because running Dockerfile manually with docker build and docker run also doesn't work because of my host OS.

peterp•2mo ago

https://github.com/redwoodjs/machinen/

GitHub

GitHub - redwoodjs/machinen: A web based text-editor for RedwoodSDK

A web based text-editor for RedwoodSDK. Contribute to redwoodjs/machinen development by creating an account on GitHub.

peterp•2mo ago

Let me know if you need some orientation around it? It's working now - so I guess upgrading vite to v7 would create a repro.

Unknown User•2mo ago

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peterp•2mo ago

Oh! I'm building/ using RedwoodSDK Which needs the Cloudflare Vite Plugin. They just added support for containers! I assumed you worked at Cloudflare, lol!

Unknown User•2mo ago

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Hey hey, I am trying to run k3 in a

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