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

[dmitrii_fediuk]

Yes.
Port 22 is not automatically open on Kubernetes containers.
The container must be explicitly configured to listen on port 22.

You also must:

• open port 22 at the service'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?