Hey, I just have a question around Cloudflare containers, does it support nested virtualization, suc

Hey, I just have a question around Cloudflare containers, does it support nested virtualization, such that it can run microVMs in the container using KVM?

McKamyk•8/6/25, 3:51 AM

Will containers sleep if there's an active websocket to them?

Yash•8/6/25, 11:54 AM

Hello Cloudflare team,
Do you have any update on when this limit will be removed and when direct public image support will be available?
This is an important feature for supporting Cloudflare containers with most images and ensuring a more scalable solution.

scotto•8/6/25, 3:44 PM

wrangler deploy from github gives 403 for the containers part, it works triggering the same npx wrangler deploy from a local machine, are we missing something in the wrangler part to avoid 403?

kian•8/6/25, 5:47 PM

Does the token you’re using have the right permissions?

《

《arin1234》•8/6/25, 6:14 PM

1984 Ford Laser•8/7/25, 5:30 AM

Anyone using Containers and can give insight into how stable they are in terms of instances not randomly shutting down for no reason? I have a use case where instances would need to stay up for around 4 hours, I know there's zero guarantee with DO/Container eviction but just curious how people are finding things before I put in the dev time to prove my concept

AAaronO What's driving the hard requirement on 4h non-stop ? Ideally it's better to have...

1984 Ford Laser•8/7/25, 6:59 AM

Event based usage where an event goes for roughly 4 hours

1984 Ford Laser•8/7/25, 7:02 AM

Just curious is anyone was seeing any consistent eviction of instances on that time frame. Containers is designed to be used for bursty workloads, but I want to make sure its suitable for my usage before getting too deep into it

fryan•8/7/25, 9:58 AM

Anyone experimenting with passing information back from the container to the overlapping Durable Object?

Ie: container processes something then stores results in DO

Tony Leung•8/7/25, 10:58 AM

does cf workers support something like worker container that start on spawn with arguments and die after finishing the job?

Manuel Ogomigo•8/7/25, 11:24 AM

Is it possible for me to run postgress on cloudflare containers?

Alexander Lewis•8/7/25, 12:00 PM

Just wondering if anyone has stumbled across this issue - Using wrangler and containers to setup a puppeteer image with devtools websocket url passed back to the requested user - Trying to get a local nodejs and php-chrome project to connect to that containers websocket but it is very hit and miss whether it connects, a lot of the time commands fail and seems the web socket drops out - Could this be a wrangler issue?

Kkian Does the token you’re using have the right permissions?

scotto•8/7/25, 12:32 PM

Not using a token, just connected the GitHub repo directly in the worker, I'm missing something ?

scotto•8/7/25, 12:33 PM

Works for any worker without container but with container we had that 403, I don't see any option to set permitimos there

McKamyk•8/7/25, 9:57 PM

when running

wrangler dev

wrangler dev

on a container DO, is the container not given a tty instance?

McKamyk•8/7/25, 10:01 PM

I'm trying to run electric-sql locally with wrangler-dev and it errors out with something that seems to resemble not having a TTY, though admittedly I'm not very erlang/elixir knowledgable. The container runs just fine when I docker builddocker build and docker rundocker run it, but fails to start in

wrangler dev

wrangler dev

. It seems to work fine when deployed

McKamyk•8/7/25, 10:02 PM

https://github.com/mckamyk/electric-wrangler

GitHub

GitHub - mckamyk/electric-wrangler

Contribute to mckamyk/electric-wrangler development by creating an account on GitHub.

gnarley_farley.•8/7/25, 11:38 PM

Hey guys has any tried to deploy a flask server to cf containers?

gnarley_farley.•8/8/25, 2:25 AM

Why do i always have 1 active instance?

gnarley_farley.•8/8/25, 2:25 AM

Can i scale down to 0

andycheng•8/8/25, 11:06 PM

Hi, when dose cf release the containers server ? Can I use containers beta in PRD environment ?

Sscotto Not using a token, just connected the GitHub repo directly in the worker, I'm mi...

kian•8/8/25, 11:19 PM

When you connect to a Git repo, it'll create an API token for you as part of that process

Ggnarley_farley.Can i scale down to 0

kian•8/8/25, 11:21 PM

Instances will scale down when they're inactive

Kkian When you connect to a Git repo, it'll create an API token for you as part of tha...

scotto•8/8/25, 11:31 PM

Then that's not working right, I connect the repo and got that error only for containers, the worker it selft deploys normally

kian•8/8/25, 11:32 PM

Have you checked the token has the Containers permission?

scotto•8/8/25, 11:40 PM

How can I check that if it's automated as far as I know

gnarley_farley.•8/9/25, 2:23 AM

Egress on containers is so expensive. All the best use cases I can think off like processing video are just totally out of reach. We did the maths on moving our ffmpeg processing to containers. Mind boggling numbers. What a pity, cloudflare has always been very generous with egress.

Samandar Turdiev•8/9/25, 4:12 AM

Hello

Samandar Turdiev•8/9/25, 4:12 AM

Can I run ffmpeg on containers?

SSamandar Turdiev Can I run ffmpeg on containers?

Isaac McFadyen•8/9/25, 5:04 AM

Yes, with some caveats that encoding video using h264/h265 can be somewhat slow even on the highest tier available currently.

Isaac McFadyen•8/9/25, 5:05 AM

But for transcoding or encoding lightweight formats like audio it runs well.

IIsaac McFadyen But for transcoding or encoding lightweight formats like audio it runs well.

Samandar Turdiev•8/9/25, 5:16 AM

I just want to encode aac audio to mp3, average file size 50Mb

Samandar Turdiev•8/9/25, 5:16 AM

What do you think, free tier is ok for my case?

SSamandar Turdiev I just want to encode aac audio to mp3, average file size 50Mb

gnarley_farley.•8/9/25, 5:26 AM

you can run ffmpeg there is one tutorial on youtube. I even got yt-dlp to run on it yesterday. Bit slow though. Cold start times are gnarley. Egress is expensive.

But if you just using it for your personal stuff it will be good. Try it out.

You get 500gb-1tb free depending on your region... Or something liek that according to the docs.

Ggnarley_farley.you can run ffmpeg there is one tutorial on youtube. I even got yt-dlp to run on...

Samandar Turdiev•8/9/25, 5:27 AM

Doesn't cloudfare workers/containers have free egress?

SSamandar Turdiev Doesn't cloudfare workers/containers have free egress?

1984 Ford Laser•8/9/25, 7:20 AM

Workers does, Containers doesn't

Ggnarley_farley.you can run ffmpeg there is one tutorial on youtube. I even got yt-dlp to run on...

1984 Ford Laser•8/9/25, 7:21 AM

Thats still a decent included tier. I process a couple hundred 3+ hour videos a month and could get through all of my monthly usage within the provided tier

11984 Ford Laser Workers does, Containers doesn't

Samandar Turdiev•8/9/25, 7:35 AM

Is Worker ineffiecnt for such cpu-intesive tasks?

1984 Ford Laser•8/9/25, 7:37 AM

correct

Samandar Turdiev•8/9/25, 7:40 AM

What can you recommend instead? I'm doing a massive conversion of audio files on-the-fly, per request, I need to offlod encoding process

11984 Ford Laser Thats still a decent included tier. I process a couple hundred 3+ hour videos a ...

gnarley_farley.•8/9/25, 7:40 AM

For Personal usage. For any app or service it's too expensive. Workers don't support the packages and also stuff like unsafe eval so not an option. Cool thing about containers is they support everything.

Ggnarley_farley.For Personal usage. For any app or service it's too expensive. Workers don't sup...

1984 Ford Laser•8/9/25, 7:40 AM

An app or service should be adequately monetised to cover such costs

gnarley_farley.•8/9/25, 7:46 AM

Too expensive. Egress fee's for things like uploading to r2 make i very pricey. For personal usage sure. Very nice

gnarley_farley.•8/9/25, 7:47 AM

Let's see how widely adopted this becomes in the next few months to a year.

SSamandar Turdiev What can you recommend instead? I'm doing a massive conversion of audio files on...

gnarley_farley.•8/9/25, 7:49 AM

If it's for users try offload to their personal computers with something like a companion app. If you have to do it remotely checkout the price of vm's. You can get them for betwen 100x to 1000x cheaper than containers depending on your workloads.

Ggnarley_farley.If it's for users try offload to their personal computers with something like a ...

Samandar Turdiev•8/9/25, 7:51 AM

Companion app?

gnarley_farley.•8/9/25, 7:52 AM

Things like ffmpeg or yt-dlp can be run off a users computer. You can make users install a binary or application on their personal computers that can interface with your service in some way. So they can make use of your software but using their personal resources

Ggnarley_farley.If it's for users try offload to their personal computers with something like a ...

Samandar Turdiev•8/9/25, 7:52 AM

I'll try to check vm options

gnarley_farley.•8/9/25, 7:53 AM

Check racknerd and try find their specials or some other service. Yearly costs are pretty low. You can upload to s3 or r2 and then make downloadable links from there.

Hey, I just have a question around Cloudflare containers, does it support nested virtualization, suc

Similar Threads

Similar Threads

Similar Threads