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Clarification for "Limitations for Linux Shell Runner"



What does "Custom build images on AWS ECR" exactly mean under the "Unsupported features" list for the Linux Shell Runner? Does this mean that we can still push container images to AWS ECR, but we cannot just use any images from the AWS ECR?


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Atlassian Team
Atlassian Team members are employees working across the company in a wide variety of roles.
Nov 01, 2022

Hey Lassi,

Unfortunately, due to security concerns - build/push to AWS ECR and indeed using AWS ECR images is not possible within Linux Shell Runners.

This is due to "ECR credentials" being out of scope for Shell runners, as well as service containers not being supported. Docker would need to be used to push to AWS ECR but it can only be implemented with a service container and is therefore not possible.

If you wish to use custom AWS ECR build images and work within these environments, you would need to make use of Linux Docker instead:


- Ben (Bitbucket Cloud Support)


Thanks for the clarification. Yes, we are pushing everything into AWS ECR, so we'll have to then continue using the Linux Docker version instead. Downside of using the Linux Docker version is that it's lacking support of Arm based instances. It takes ages to do Arm builds as you need to emulate everything.

Any plans for the Arm support?

Atlassian Team
Atlassian Team members are employees working across the company in a wide variety of roles.
Nov 02, 2022

Hey Lassi,

Not a problem, glad to be of assistance :)

We do have an existing feature request for supporting ARM architecture in our Bitbucket Runners, this is with our developers and unfortunately, we cannot provide an ETA as to its inclusion in the product:

Feel free to "Watch" this feature request to receive future updates and "Vote" for it to improve visibility in regards to customer demand.


- Ben (Bitbucket Cloud Support)

Like Lassi Henriksson likes this

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