Is it necessary to open port 22 at the service's level in Kubernetes for SSH access to a container via `ssh`?

[dmitrii_fediuk]

Yes.
If you do not do it, the command:

kubectl port-forward svc/<service> <client port>:22 -n <namespace>

will result in the error: «Service does not have a service port 22»:

You will also need to:

• open port 22 at the container's level
• install and configure an SSH server in the container.

[dmitrii_fediuk]

• How to open port 22 (for SSH connection) on a service's page in Rancher?
• What are the differences between enabling SSH access to a pod and a container in Kubernetes?
• What are the differences between enabling SSH access to a pod and a service in Kubernetes?