[Release-1.28] - Duplicate mirror endpoint causes containerd to fail to load mirror config from hosts.toml

[brandond]

Backport fix for Duplicate mirror endpoint causes containerd to fail to load mirror config from hosts.toml

• Duplicate mirror endpoint causes containerd to fail to load mirror config from hosts.toml #9693

[mdrahman-suse]

Validated on RC v1.28.8-rc1+k3s1

Followed Steps as mentioned here: #9693 (comment)

Replication

$ k3s -v
k3s version v1.28.7+k3s1 (051b14b2)
go version go1.21.7

$ sudo cat /var/lib/rancher/k3s/agent/etc/containerd/certs.d/docker.io/hosts.toml
# File generated by k3s. DO NOT EDIT.
server = "https://registry-1.docker.io/v2"

[host."https://registry.example.com/v2"]
  capabilities = ["pull", "resolve"]
[host."https://registry.example.com/v2"]
  capabilities = ["pull", "resolve"]

$ sudo less /var/lib/rancher/k3s/agent/containerd/containerd.log | grep 'duplicated'
time="2024-03-21T21:39:30.010320906Z" level=error msg="failed to decode hosts.toml" error="failed to parse TOML: (6, 2): duplicated tables"

Validation

$ k3s -v
k3s version v1.28.8-rc1+k3s1 (653dd61a)
go version go1.21.8

$ sudo cat /var/lib/rancher/k3s/agent/etc/containerd/certs.d/docker.io/hosts.toml
# File generated by k3s. DO NOT EDIT.

server = "https://registry-1.docker.io/v2"
capabilities = ["pull", "resolve", "push"]



[host."https://registry.example.com/v2"]
  capabilities = ["pull", "resolve"]
$ sudo less /var/lib/rancher/k3s/agent/containerd/containerd.log | grep 'duplicated'
$