[release-1.26] Backports for 2024-02 release cycle

[brandond]

Proposed Changes

Backports:

• Fix on-demand snapshots on ipv6-only nodes #9247
• Fix snapshot reconcile retry #9318
• Bump CNI plugins to v1.4.0 #9249
• Fix issue with coredns node hosts controller #9354
• Add check for etcd-snapshot-dir and fix panic in Walk #9317
• Don't create NodePasswordValidationFailed event if agent is disabled #9312
• Bump kine and set NotifyInterval to what the apiserver expects #9349
• Expose rootless state dir under ~/.rancher/k3s/rootless #9308
• Expose rootless containerd socket directories for external access #9309

Types of Changes

backports

Verification

See linked issues

Testing

Linked Issues

• [Release-1.26] - k3s etcd-snapshot save fails on host with IPv6 only #9370
• [Release-1.26] - etcd snapshot ConfigMap controller excessive sync requeuing #9373
• [Release-1.26] - Bump cni-plugins to v1.4.0 #9379
• [Release-1.26] - Core DNS missing NodeHosts key in Configmap #9382
• [Release-1.26] - Panic when etcd-snapshot-dir does not exist #9391
• [Release-1.26] - "NodePasswordValidationFailed" Event is created on server restart when agent is disabled #9452
• [Release-1.26] - Bump kine and align kine/etcd NotifyInterval with upstream #9455
• [Release-1.26] - Difficult to nsenter rootless k3s to interact with namespaced sockets and filesystems #9458
• [Release-1.26] - Cannot use --container-runtime-endpoint with rootless k3s #9461

User-Facing Change

Further Comments

[codecov]

Codecov Report

Attention: 41 lines in your changes are missing coverage. Please review.

Comparison is base (b5da7cf) 14.73% compared to head (6f0fecd) 14.72%.

Files	Patch %	Lines
pkg/etcd/etcd.go	35.71%	17 Missing and 1 partial ⚠️
pkg/rootless/mounts.go	0.00%	11 Missing ⚠️
pkg/etcd/snapshot.go	0.00%	6 Missing ⚠️
pkg/cluster/cluster.go	0.00%	5 Missing ⚠️
pkg/etcd/snapshot_controller.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@               Coverage Diff                @@
##           release-1.26    #9464      +/-   ##
================================================
- Coverage         14.73%   14.72%   -0.01%     
================================================
  Files               115      115              
  Lines              8457     8475      +18     
================================================
+ Hits               1246     1248       +2     
- Misses             6961     6977      +16     
  Partials            250      250              

Flag	Coverage Δ
unittests	14.72% <19.60%> (-0.01%)	⬇️

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