kubectl rollout restart deployment

[vdesplanque]

Hello,

I didn't find a built-in way in the client to execute a "rollout restart" of a deployment.

I figured out (by using --v=9 at the end of my command) that the request that kubernetes send internally is :

I0706 16:17:18.956135    2800 request.go:1068] Request Body: {"spec":{"template":{"metadata":{"annotations":{"kubectl.kubernetes.io/restartedAt":"2021-07-06T16:17:18+02:00"}}}}}

I tried to use "PatchNamespacedDeploymentAsync", with no luck.

Here is the code I use :

var deployment = await _kubernetes.ReadNamespacedDeploymentAsync(deploymentName, @namespace);
var restart = new Dictionary<string, string>(deployment.Metadata.Annotations)
{
    ["kubectl.kubernetes.io/restartedAt"] = DateTime.UtcNow.ToString("s")
};

var patch = new JsonPatchDocument<V1Deployment>();
patch.Replace(e => e.Metadata.Annotations, restart);
var patchResponse = await _kubernetes.PatchNamespacedDeploymentAsync(new V1Patch(patch), deploymentName, @namespace);
var patchedDeployment = await _kubernetes.ReadNamespacedDeploymentAsync(deploymentName, @namespace);

"patchedDeployment", that I retrieve by doing again a ReadNamespacedDeploymentAsync contains my updated Metadata.Annotations "kubectl.kubernetes.io/restartedAt" with the expected value, but the related pods are not restarted.

The pods are restarted almost instantly when I run "kubectl rollout restart deployment -n namespace --v=9"

What do I miss ?

[brendandburns]

The kubectl rollout code is here:

https://github.com/kubernetes/kubectl/blob/master/pkg/cmd/rollout/rollout_restart.go
https://github.com/kubernetes/kubectl/blob/master/pkg/polymorphichelpers/objectrestarter.go#L35

Note the section here:

		if obj.Spec.Paused {
			return nil, errors.New("can't restart paused deployment (run rollout resume first)")
		}

Is it possible your Deployment is paused also?

[vdesplanque]

Thank you for your answer.
It seems that I updated the wrong property : "e.Metadata.Annotations" instead of "e.Spec.Template.Metadata.Annotations".
Here is the final code, if it can help someone :

var deployment = await _kubernetes.ReadNamespacedDeploymentAsync(deploymentName, @namespace);
var restart = new Dictionary<string, string>(deployment.Spec.Template.Metadata.Annotations)
{
    ["kubectl.kubernetes.io/restartedAt"] = DateTime.UtcNow.ToString("s")
};

var patch = new JsonPatchDocument<V1Deployment>();
patch.Replace(e => e.Spec.Template.Metadata.Annotations, restart);
var patchResponse = await _kubernetes.PatchNamespacedDeploymentAsync(new V1Patch(patch), deploymentName, @namespace);
var patchedDeployment = await _kubernetes.ReadNamespacedDeploymentAsync(deploymentName, @namespace);