fix etcdctl copy operation in crio

[ErikJiang]

What type of PR is this?
/kind bug

What this PR does / why we need it:
Currently, crictl does not support the copy command, so I use cp /proc/${container_pid}/root/${file_path} to fix the etcdctl copy operation for now.

Which issue(s) this PR fixes:

Fixes #10240

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

[cri-o] Fix etcdctl copy operation 

[MrFreezeex]

Thanks for fixing this 🙏
/lgtm

[yckaolalala]

AFAIK nerdctl can not run in crio.sock .
If want to copy etcdctl from image, need to start etcd in containerd and using nerdctl with containerd.sock ?

# CRI socket path
cri_socket: >-
  {%- if container_manager == 'crio' -%}
  unix:///var/run/crio/crio.sock
  {%- elif container_manager == 'containerd' -%}
  unix:///var/run/containerd/containerd.sock
  {%- elif container_manager == 'docker' -%}
  unix:///var/run/cri-dockerd.sock
  {%- endif -%}

• roles/container-engine/nerdctl/templates/nerdctl.toml.j2

debug             = false
debug_full        = false
address           = "{{ cri_socket }}"

[ErikJiang]

@yckaolalala You are right, nerdctl does not seem to be a good way, I modified the method to get etcdctl, please review it, thanks a lot😁

[ErikJiang]

@MrFreezeex @yankay PTAL, Thanks 😊

[MrFreezeex]

That's a nice trick :D
/lgtm

[oomichi]

/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: ErikJiang, MrFreezeex, oomichi

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