finally got it up and running, after more than an hour.

SKUZZIE•6/27/25, 4:46 AM

Is there an example for manually making a request to a container from a worker instead of just proxying a request? This is a really cool product btw

Edit: Nevermind, this worked. Although it'd be nice to have a nicer API for doing this:

await container.fetch(
    "http://localhost:3000/transcode",
    {
        method: "POST",
        body: object.body,
    },
);

await container.fetch(
    "http://localhost:3000/transcode",
    {
        method: "POST",
        body: object.body,
    },
);

Iiddogino I am actually running into an issue that might be similar / related to @surgery1...

windsor nguyen•6/27/25, 6:00 AM

also getting this issue. works locally but not when deployed. has anyone found a fix?

Iiddogino I am actually running into an issue that might be similar / related to @surgery1...

stt9015•6/27/25, 6:01 AM

I am getting this exact same problem "Error checking if container is ready: There is no container instance that can be provided to this durable object, try again later or scale the application". Each time I make a request to my worker, a new instance ID is correctly created in the instance list. However, its state is immediately set to Inactive. It never enters a Running state, and the "Live Instances" count remains at 0.

SSameer Ali finally got it up and running, after more than an hour.

stt9015•6/27/25, 10:16 AM

What did you do to get it working? Feel like I’m in a similar boat

ldl•6/27/25, 10:35 AM

I'm having an issue with container configuration where instance_typeinstance_type setting isn't working:

"containers": [
  {
    "class_name": "MyContainer",
    "image": "./Dockerfile", 
    "max_instances": 5,
    "instance_type": "basic",
    "name": "n8n-container"
  }
]

"containers": [
  {
    "class_name": "MyContainer",
    "image": "./Dockerfile", 
    "max_instances": 5,
    "instance_type": "basic",
    "name": "n8n-container"
  }
]

the "instance_type": "basic""instance_type": "basic" configuration doesn't seem to take effect - the container still uses default settings.

Does anyone know the correct way to configure this? Or is this field name even correct?

Dawson•6/27/25, 11:10 AM

is the pricing public yet?

Dawson•6/27/25, 11:11 AM

https://developers.cloudflare.com/containers/pricing/

Cloudflare Docs

Pricing

Containers are billed for every 10ms that they are actively running at the following rates, with included monthly usage as part of the $5 USD per month Workers Paid plan:

Dawson•6/27/25, 11:11 AM

ah yes it is

Dawson•6/27/25, 11:26 AM

Does anyone have some real cost estimates? I host about 12 projects on a VPS atm, and have no idea if it would be cheaper to run on cf containers. These are all dynamic nextjs apps with a trpc + bun backend. I have no idea where to start with calculating how many CPU / ram minutes my app uses

DDawson Does anyone have some real cost estimates? I host about 12 projects on a VPS atm...

John Spurlock•6/27/25, 11:30 AM

cost of the dev instance running for 30 days: $5.25, basic: $20.16, standard: $52.56 - imo this service isn't really meant to replace a long-running vps, it's more for bursty use-cases and things that would benefit from running on cf's network

Dawson•6/27/25, 11:31 AM

Hmmm okay. Thank you

I do have a few things that would benefit from this though so I will 100% be checking this out

Dawson•6/27/25, 11:31 AM

Very cool platform you all have here

nickmundel•6/27/25, 11:36 AM

Hey all, I have a quick. or longer question depending on the answer, but I have a problem with internet connectivity. I have the following setup: a go web server as a sort of API with API-keys, etc and a route which makes use of typst to generate me PDF from text. Typst has quite the large package ecosystem and to fetch those from their package registry it needs internet connectivity. I followed the docs trying to set enableInternet: true in the Durable Object when starting the container. The problem is it just doesnt work, I create a quick script in the docker container to ping a few websites, but they all fail because they dont find a route to these websites. Im at a loss at the moment, if needed I can post my current DO setup if that help. Thank you for your help!

JeanSebTr•6/27/25, 2:28 PM

The April blog post announcement had a code snippet using enableInternet: falseenableInternet: false with a callback named onContainerRequestonContainerRequest for fetch requests to the configured workersAddressworkersAddress from inside the container

Is it something that's actually supported? I wasn't able to find anything in the documentation, generated types or the @cloudflare/containers@cloudflare/containers repo

JJeanSebTr The April blog post announcement had a code snippet using `enableInternet: fals...

nickmundel•6/27/25, 2:34 PM

Yeah I dont think so at the moment, there is also a Thread in this channel about that which states that it is not supported. But I believe that that has nothing to do with general internet connectivity, rather than setting up something more complicated between workers

KKZ actually nm i think they are coming up wih something better listenTcp @6 (filter...

KZ•6/27/25, 2:41 PM

@JeanSebTr@nickmundel not implemented yet

nickmundel•6/27/25, 2:42 PM

@KZ but that hasn't anything to do with Internet connectivity, right?

Nnickmundel @KZ but that hasn't anything to do with Internet connectivity, right?

KZ•6/27/25, 2:46 PM

@JeanSebTr's is about controlling the container prevent outbound to public but enable within cloudflare. enableInternet:false should work but they don't have the listenTcp yet. i had the same question because of the blog article had to dive into workerd code to see it wasn't implemented. confirmed the PM building that functionality out

JJeanSebTr The April blog post announcement had a code snippet using `enableInternet: fals...

KZ•6/27/25, 2:51 PM

something else to see is that they're releasing https://blog.cloudflare.com/workers-virtual-private-cloud/ maybe soon. its possible that durableobjects will be part of that in which i would think this would fall under the containers

KKZ @JeanSebTr's is about controlling the container prevent outbound to public but e...

JeanSebTr•6/27/25, 3:19 PM

Thanks for the info! It would be great for the container to be able to call its DurableObject. Would simplify coordination if the container can push state when required instead of maintaining websockets or polling for progress

Sstt9015 What did you do to get it working? Feel like I’m in a similar boat

Sameer AliOP•6/27/25, 5:09 PM

i guess, it took its time to provision the instance.

Ssurgery18 I am getting this error `The container is not listening in the TCP address 10.0....

surgery18•6/27/25, 6:08 PM

Has anyone solved this kind of error yet? Would love ideas on what to try to get it working.

DDefenestrator I don't think the requiredPorts are needed, was one of the many things I tried. ...

SKUZZIE•6/27/25, 8:13 PM

That fixed it for me, thanks! This should get added to the docs...
Edit: JK the error came back

Ssurgery18 Has anyone solved this kind of error yet? Would love ideas on what to try to get...

Francisco Hermida•6/27/25, 9:16 PM

I was having the same exact error as you "The container is not listening in the TCP address", sometimes it would connect sometimes not, "A call ... waited for too long". I went to sleep woke up tried again and it worked. Very weird

FFrancisco Hermida I was having the same exact error as you "The container is not listening in the ...

surgery18•6/27/25, 9:22 PM

Interesting. Mine hasn't even worked once yet. Just the errors being shown.

Ssurgery18 Interesting. Mine hasn't even worked once yet. Just the errors being shown.

Francisco Hermida•6/27/25, 9:28 PM

Most likely an issue on cloudflare's side

FFrancisco Hermida Most likely an issue on cloudflare's side

surgery18•6/27/25, 9:40 PM

So I JUST managed to fix it thanks to @Thomas Lefebvre and the issue was the instance type needed to be bigger. So instead of the default dev size, it needed to be the basic type. So @Francisco Hermida try using the basic instance_type. I think it is because the docker image might need to consume more memory then what is available on the dev type. That is my guess. So maybe you should try that too to see if it fixes your issue if it comes back for you.

Ssurgery18 So I JUST managed to fix it thanks to @Thomas Lefebvre and the issue was the ins...

Francisco Hermida•6/27/25, 9:47 PM

I already had my instance type set to the largest yesterday. Maybe the change took a really long time to take effect? I probably played with it for at least 30 minutes after changing to a larger instance. Thanks for sharing will keep it in mind if it comes back.

FFrancisco Hermida I already had my instance type set to the largest yesterday. Maybe the change to...

1984 Ford Laser•6/27/25, 11:28 PM

Did you spawn a new instance after making the change? I imagine an instance of a container can't have its instance type changed once its been created the first time

11984 Ford Laser Did you spawn a new instance after making the change? I imagine an instance of a...

Francisco Hermida•6/27/25, 11:40 PM

I only changed the instance type on wrangler config which didn't work for a while then suddenly worked hours later when I tried again

FFrancisco Hermida I only changed the instance type on wrangler config which didn't work for a whil...

1984 Ford Laser•6/27/25, 11:41 PM

When you spawned a new instance..? Or did you connect to a previously created one

11984 Ford Laser When you spawned a new instance..? Or did you connect to a previously created on...

Francisco Hermida•6/27/25, 11:55 PM

I don't fully know when a new instance is spawned or how to create or delete one. I just followed the container-template (which doesn't set the instance_type) and was hoping that on new deploys it would somehow update everything for me, which probably is not the case.

Francisco Hermida•6/28/25, 1:19 AM

has anyone come across a container demo that is based on node and not go?

terrxo•6/28/25, 9:03 AM

Are containers supported in multi config development (wrangler dev -c package/a -c package/b) ? Currently geting container image path resolving issues when running the dev command from root repository.

The image "./Dockerfile" does not appear to be a valid path to a Dockerfile

The image "./Dockerfile" does not appear to be a valid path to a Dockerfile

parisholley•6/28/25, 3:00 PM

would be great if we could define memory/cpu at runtime. i have a few async job flows i deploy via cloudrun, examples are generating videos or zip files, and the amount of memory/disk space is relative to number of input files. atm i use up to 8 vcpu/16gb, so probably awhile before containers is usable as a product

parisholley•6/28/25, 3:02 PM

(i suppose i could setup different instance types) and make it dynamic that way

slice•6/28/25, 6:51 PM

Is it possible to deploy discord bot on cloudflare containers ?

goofysystem•6/28/25, 7:34 PM

Is there a way to access/upload to local R2 from my container or do I have to run wrangler dev --remote to work with workers + containers + r2? I'm using S3 API to interact with R2 from my container.

Sslice Is it possible to deploy discord bot on cloudflare containers ?

slice•6/28/25, 7:49 PM

so how do i create it ?

the discord bot doesn't need any web traffic to start. it must run 24*7 without any web traffic.

Sslice so how do i create it ? the discord bot doesn't need any web traffic to start. ...

Hello, I’m Allie!•6/28/25, 8:02 PM

You can set an alarm to keep it alive, but you probably want multiple containers, as you aren’t necessarily guaranteed the container will keep running forever

✅

✅BattlefieldDuck•6/28/25, 8:04 PM

Hello, is it possible to consume message from cloudflare queue to cloudflare containers? is there any examples? thanks

HHello, I’m Allie!You can set an alarm to keep it alive, but you probably want multiple containers...

slice•6/28/25, 8:04 PM

I was planning to use long polling

slice•6/28/25, 8:05 PM

does that mean that there must be a http based entry point for containers to work ?

Iiamnotapipe cron?

slice•6/28/25, 10:39 PM

It would be lot of cronjobs

slice•6/28/25, 10:40 PM

Or delay in processsing in the bot

Francisco Hermida•6/29/25, 4:58 AM

made a demo showing how to use containers to create a image transformation service:
https://github.com/franciscohermida/boa-stack-img-transformer

GitHub

GitHub - franciscohermida/boa-stack-img-transformer

Contribute to franciscohermida/boa-stack-img-transformer development by creating an account on GitHub.

slice•6/29/25, 12:44 PM

hello, how do I have a mongodb database connectivity here ?

so everytime a container is spun it will create new instance of database ? is there any way to store the db instance in durable objects or something ?

finally got it up and running, after more than an hour.

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