How to save image of running pod on aks like "docker commit"

Question

How to save image of running pod on aks like "docker commit"

Sachin 5

Hi,

AKS nodes are now with CRI plugins so I cannot do docker commit to save images of running pod on nodes.

Can anyone help on how to save image of running pods on AKS? Any alternative?

Prrudram-MSFT 28,281 Reputation points Microsoft Employee Moderator

2023-03-01T21:08:44.0566667+00:00

@Sachin

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Prrudram-MSFT 28,281 Reputation points Microsoft Employee Moderator

2023-03-01T21:08:44.0566667+00:00

@Sachin

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Answer 1

Tech-Hyd-1989 5,816

Hello @Sachin
Goodday!

Alternatively, you can use Azure Container Registry (ACR) to store your Docker images. AKS supports the Docker image format, and you can integrate it with ACR for private storage of your Docker images. To create a private image store, see Azure Container Registry.
I think you can use kubectl cp command to copy files from a running container to your local machine, including the Dockerfile and any other files you need to build the image.

Use the az acr build command to build and push the image to an Azure Container Registry (ACR). This command builds the image from a Dockerfile, then pushes the image to an ACR.

Basically, Identify the pod and container you want to save, then use the below command to copy

kubectl cp <pod-name>:<container-path> <local-path>

Create a Dockerfile that includes the copied files. Build the Dockerfile and push the image to an ACR using the az acr build command.

az acr build --image <image-name>:<tag> --registry <acr-name> --file <path-to-dockerfile> <path-to-context>

I believe that's it. Feel free to reach out for any queries.

If this does answer your question, please accept it as the answer as a token of appreciation.

Sachin 5 Reputation points

2023-02-24T16:46:26.0366667+00:00

Thanks Subroto.

Creating new image by using running pod files doesn't help here.

I am looking to save image of running pod with its current state.

I was able to achieve this by executing "docker commit <contaienerID>" command on kubernetes nodes.

But from kuberenetes version 1.22 the kubernetes nodes having CRI plugin and due to this I cannot execute docker commands on the nodes.
Tech-Hyd-1989 5,816 Reputation points

2023-03-01T10:31:41.29+00:00

Hello @Sachin

You should be able to use nerdctl nerdctl/command-reference.md at main ·containerd/nerdctl (github.com) if the cluster using containerd as the runtime. Please take a look.

If this my response does answer your queries, please accept as the answer as a token of appreciation.

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How to save image of running pod on aks like "docker commit"

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