Cloudflare Developers•6mo ago

You can get original dockerfile and drop the stuff you don't need. I would start from that point

AAlex You can get original dockerfile and drop the stuff you don't need. I would start...

Mr. Technician•7/5/25, 10:39 PM

ah ok, i doubt there much i can drop unfortunately

619napster•7/5/25, 11:10 PM

The code below was working fine a day ago
but now I am getting this error
anything I have missed ?
I was not calling start before as well

619napster•7/5/25, 11:59 PM

Never mind i just missed a pacakge in requirements.txt

Muhammad•7/6/25, 6:37 AM

I'm getting: Container suddenly disconnected, try again

it's working perfectly on localhost but once I deploy I get the error

IIsaac McFadyen No, if you use one Worker and then add multiple `containers` (in your wrangler.j...

jaden•7/7/25, 2:06 AM

In our current architecture, I want it to be similar to "worker for platform." A worker can mount multiple containers (services) and use subdomains to distribute traffic to different containers. Currently, when I look at the deployment process, containers are represented as an array. In this case, it seems that deploying multiple containers simultaneously is not feasible, as this is a distributed scenario where several deployments may occur at the same time. How can this be handled?

Tterrxo Did you get it working?

jaden•7/7/25, 2:08 AM

yes.

jaden•7/7/25, 2:23 AM

The wrangler tail prints the logs of the current worker. Is there any way to query the real-time logs of the container through a command? This is because the stack output of the container is also of concern.

RRadu ``` const response = await container.containerFetch("http://container/to-markd...

daycompacted•7/7/25, 3:27 AM

Hey, were you able to solve this, I'm having the same issue for multi part form

Alexander•7/7/25, 7:47 PM

Hey

Thanks for the awesome work with Containers - I'm having so much plans for these. Building some really cool stuff and I want to understand if there is a limit & a way to increase

max_instances

max_instances

for an account?

Elliot Hesp•7/8/25, 8:39 AM

Is it possible to access the underlying

storage

storage

when extending the container?

TobiLG•7/8/25, 9:04 AM

If you've built OSS projects on Containers, or wrote a blog post about it, feel free to add them via opening a PR to https://github.com/tobilg/awesome-cloudflare-containers

GitHub

GitHub - tobilg/awesome-cloudflare-containers

Contribute to tobilg/awesome-cloudflare-containers development by creating an account on GitHub.

ldl•7/8/25, 11:05 AM

What does it mean when the State is Degraded, and how should I resolve it?

spike•7/8/25, 5:09 PM

can you not pass envVars with startAndWaitForPorts?

Sspike can you not pass envVars with startAndWaitForPorts?

John Spurlock•7/8/25, 5:23 PM

not at the call-level like

start

start

, but looks like it will default to the container-level

envVars

envVars

so you could set them there

spike•7/8/25, 5:28 PM

yea just saw the pr to add startoptions

Frederic Houle•7/8/25, 9:21 PM

I'm not able to make my container work properly once deployed, I Keep getting "Container suddenly disconnected, try again"

Frederic Houle•7/8/25, 9:21 PM

while in local, everything runs smooth

toshu•7/9/25, 12:04 AM

Hello! Are there any examples of github actions for containers deployment? My action works intermittently, fails often with auth permission:
[ERROR] A request to the Cloudflare API (/zones/.../workers/routes) failed.

Authentication error [code: 10000]

It looks like you are authenticating Wrangler via a custom API token set in an environment variable.
Please ensure it has the correct permissions for this operation.

Ttoshu Hello! Are there any examples of github actions for containers deployment? My ac...

downeydabber•7/9/25, 1:50 AM

Are you providing it an API token? Shot in the dark, but if you are using the default "edit cloudflare workers" template, it doesn't seem to include containers permissions by default, might be worth trying to add that permission and see if it helps

downeydabber•7/9/25, 1:56 AM

Has anyone had success with containers on ARM based macs? getting container errors on both base OS and in a devcontainer on mac. Everything seems to be configured correctly but can't get it to fetch properly. Even the cloudflare examples don't seem to be working. Haven't tested on an x86 machine yet

Idyll•7/9/25, 3:46 AM

So... I've managed to get some interesting proof-of-concept stuff going with containers. But to make them really useful I need to talk to data somewhere...

can I bind D1 somehow? do I need to talk back to the worker for D1? is the standard approach for this a websocket?
- what are the plans for mounting R2 like was discussed on the video?
- what about hyperdrive?
- I have some workloads where even with hyperdrive I can't imagine wanting to be out of the same region as my DB. and right now my containers end up on another continent.

ralphjsmit•7/9/25, 8:37 AM

Can we use the Containers beta to run the Browser Rendering feature at a higher memory?
Or is the dockerfile a must and must I try to run e.g. Chromium via Docker?

sampotter•7/9/25, 10:10 AM

Anybody elses containers being consistently being evicted after approx 2 minutes? I'm starting up a container manually using the

start

start

method so that I can provide a

JOB_ID

JOB_ID

environment variable to the container. The job starts up and begins processing for roughly 2 minutes before dying? Is this normal? Btw I'm setting the

sleepAfter

sleepAfter

option to

24h

24h

ralphjsmit•7/9/25, 10:30 AM

Hello, does anybody see why I'm getting the following 404?

 => => naming to registry.cloudflare.com/b6e9a2ec6a599a3fec8a63f9fc29c03d/browsershot-containers:22743b05                                                            0.0s
Login Succeeded
Image does not exist remotely, pushing: registry.cloudflare.com/b6e9a2ec6a599a3fec8a63f9fc29c03d/browsershot-containers:22743b05
The push refers to repository [registry.cloudflare.com/b6e9a2ec6a599a3fec8a63f9fc29c03d/browsershot-containers]

 => => naming to registry.cloudflare.com/b6e9a2ec6a599a3fec8a63f9fc29c03d/browsershot-containers:22743b05                                                            0.0s
Login Succeeded
Image does not exist remotely, pushing: registry.cloudflare.com/b6e9a2ec6a599a3fec8a63f9fc29c03d/browsershot-containers:22743b05
The push refers to repository [registry.cloudflare.com/b6e9a2ec6a599a3fec8a63f9fc29c03d/browsershot-containers]

Alexander•7/10/25, 5:42 AM

Hey, is there a way to run integration tests using a Container DO? I've tried setting it up but keep running into

Error: Container is not enabled for this durable object class. Have you correctly setup your wrangler.toml?

Error: Container is not enabled for this durable object class. Have you correctly setup your wrangler.toml?

MMike Nomitch Hello again 👋 - Here with a general update on some common snags people are see...

Alexander•7/10/25, 5:05 PM

Any tips to try to resolve #4 except adding

max_instances

max_instances

or updating to a basic / standard

instance_type

instance_type

want to be able to spin up containers on prod so bad

P.S. Opened a GitHub thread but tagging here for any changes / tips I might have missed)

snehendu•7/10/25, 5:26 PM

Hey everyone, does anyone know how to do programmatic deployment to cloudflare?

In my usecase, users would want to spin up a docker container from a docker image. But the thing is I want to do this programmatically as I will have the container code saved in R2

There will be multiple containers that will spin up from a single image and we need to take care of how to handle the deployment

Kraus•7/10/25, 9:18 PM

I am setting instance type to standard but the actual containers are still getting provisioned to 256mb of memory. How can I fix this?

deepenpatel19•7/11/25, 12:57 PM

Hey

I want to deploy container and apply scaling.
How can I do?
I can’t see options to use container deployments so.

concurrentdeadlock•7/11/25, 1:31 PM

What is the upper bound for the max_instances field?

flof.fly•7/12/25, 9:54 AM

Can I invoke a Container from a Workflow?

flof.fly•7/12/25, 11:49 AM

Yes I can

flof.fly•7/12/25, 12:12 PM

Getting: Failed to start container: The container is not running, consider calling start()

Fflof.fly Getting: Failed to start container: The container is not running, consider calli...

flof.fly•7/12/25, 12:24 PM

Issue was related to my Dockerfile, fixed the COPY part

RRafal 👋 I'm trying to run Sandbox. I'm failing to use Dockerfile from node_modules s...

ldl•7/13/25, 1:15 AM

I have the same problem

IIdyll So... I've managed to get some interesting proof-of-concept stuff going with con...

Beny•7/13/25, 8:21 AM

We are using the websocket method. It works pretty well.
You can also run a local worker inside the container with remote bindings to access things like R2 and D1. Hyperdrive isn't supported with remote bindings yet but is being worked on

flof.fly•7/13/25, 8:38 AM

Hey, I'm working Locally with Worker invoking a Workflow invoking a Container.

It seems to me that Workflows are Docker Containers when executed locally, and Container is also up&running in localhost:8080 (i can reach it using postman i.e)

But seems that the Workflow's container is unable to see the Container's container.

I get the following error in localhost:

✘ [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: The operation was aborted

I tried changing hostname to 0.0.0.0:8080 but didn't change much.

Any help? Would love to share my wrangler config file.

This only applies in localhost, deployed works as expected.

Bbrainstorm I'm currently facing a cloudflare ports binding issue... despite specifying `808...

bomboclat•7/14/25, 8:23 AM

~~are you setting the defaultPort in the Container class? link~~

edit looked at the PR and yes you are

Cloudflare Docs

Env Vars and Secrets

Pass in environment variables and secrets to your container

Aniog•7/14/25, 9:00 AM

I wonder if there is any way to support starting dev server and hot updates with the code uploaded to containers using wrangler deploy now？

Bbrainstorm I looked at options through the wrangler.jsonc config, but there's none where yo...

bomboclat•7/14/25, 9:16 AM

Have you tried removing the extra port? just debugging by reducing the complexity of exposing two ports

Eelco•7/14/25, 9:42 AM

Facing the same connection issues locally on macos.

The container is mapped to 550XX -> 8080 and the worker says it can't connect to 8080. The ephemeral port mapping doesnt seem to work correctly. Since the worker can spin up multiple containers it shouldn't try to connect to 8080 directly but the mapped 550XX port.

Eelco•7/14/25, 10:01 AM

Downgrading to "@cloudflare/containers": "0.0.19", from 0.0.22 fixed it.

Eelco•7/14/25, 10:07 AM

I recon this is the issue.

https://github.com/cloudflare/containers/commit/0611bc7dcb0653b0c90c3fa9d0d6a00d31d0ae5d#diff-29f6935de7d89eec5929ebe8d3fb298265b320961523b05695398f0bc4ae729bR746

The request comes from localhost:8787. with this change instead of using the default port it will use the port of the original request 8787 and the container request fails

=> => naming to registry.cloudflare.com/b6e9a2ec6a599a3fec8a63f9fc29c03d/browsershot-containers:22743b05 0.0s Login Succeeded Image does not exist remotely, pushing: registry.cloudflare.com/b6e9a2ec6a599a3fec8a63f9fc29c03d/browsershot-containers:22743b05 The push refers to repository [registry.cloudflare.com/b6e9a2ec6a599a3fec8a63f9fc29c03d/browsershot-containers]

You can get original dockerfile and drop the stuff you don't need. I would start from that point

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