There are non-blocking comments/discussions in #5904. Created this issue to track each of those.

1. When running integration test locally, I have to add two env variables ENABLE_CRI_SANDBOXES="" CONTAINERD_RUNTIME=runc. This shouldn't be necessary.
2. container_update_resources.go should be platform agnostic but it isn't. That leads to copied function in pkg/cri/server/container_update_resources_other.go.
3. https://github.com/containerd/containerd/pull/5904/files#r979156661
4. https://github.com/containerd/containerd/pull/5904/files#r969022061
5. https://github.com/containerd/containerd/pull/5904/files#r953876126
6. https://github.com/containerd/containerd/pull/5904/files#r969034596
7. https://github.com/containerd/containerd/pull/5904/files#r979151113
8. Update container with sandbox metadata after NetNS is created #7481 (comment)
9. [port #5904 to sbserver] Setup pod network after creating the sandbox container #7426 (comment)
10. https://github.com/containerd/containerd/pull/7426/files#r997607252
    • The state of sandbox after loading affects Sandbox_Remove logic in 1.5. https://github.com/containerd/containerd/blob/release/1.5/pkg/cri/server/sandbox_remove.go#L51
11. Follow-ups on PR #5904 - Setup pod network after creating the sandbox container #7441 (comment)