[Release-1.25] - Add warning that containerd's config.toml is auto generated

[dereknola]

Backport fix for Add warning that containerd's config.toml is auto generated

• Add warning that containerd's config.toml is auto generated #7056

[mdrahman-suse]

Validated on branch release-1.25 with commit 37a2637

Environment Details

Infrastructure

• Cloud
• Hosted

Node(s) CPU architecture, OS, and Version:

Linux 5.15.0-1026-aws #30-Ubuntu SMP Wed Nov 23 14:15:21 UTC 2022 x86_64 x86_64 x86_64 GNU/Linux
PRETTY_NAME="Ubuntu 22.04.1 LTS"

Cluster Configuration:

1 server

Config.yaml:

write-kubeconfig-mode: 644
cluster-init: true

Testing Steps

1. Copy config.yaml

$ sudo mkdir -p /etc/rancher/k3s && sudo cp config.yaml /etc/rancher/k3s

2. Install k3s:

• For replication: curl -sfL https://get.k3s.io | sudo INSTALL_K3S_VERSION=v1.25.7+k3s1 sh -
• For validation: curl -sfL https://get.k3s.io | sudo INSTALL_K3S_COMMIT=37a26379d5780d145203d59f5ebebf39e39632fa sh -

3. Check for warning comment on top of the file using var/lib/rancher/k3s/agent/etc/containerd/config.toml

Replication Results:

• k3s version used for replication:

v1.25.7+k3s1

• No warning is observed

$ sudo cat /var/lib/rancher/k3s/agent/etc/containerd/config.toml

version = 2

[plugins."io.containerd.internal.v1.opt"]
  path = "/var/lib/rancher/k3s/agent/containerd"
...

Validation Results:

• k3s version used for validation:

k3s version v1.25.7+k3s-37a26379 (37a26379)
go version go1.19.6

• Observed the warning

$ sudo cat /var/lib/rancher/k3s/agent/etc/containerd/config.toml

# File generated by k3s. DO NOT EDIT. Use config.toml.tmpl instead.
version = 2

[plugins."io.containerd.internal.v1.opt"]
  path = "/var/lib/rancher/k3s/agent/containerd"