This release updates Kubernetes to v1.34.3, and fixes a number of issues.
For more details on what's new, see the Kubernetes release notes.
K3s v1.34 Upgrade Warning
This warning targets users who perform upgrades by adding new nodes to the cluster, and removing old ones. If your etcd cluster membership is and has been consistent across versions, you should NOT be affected by this issue.
K3s v1.34 and higher include etcd 3.6. Maintainers of the etcd project have indicated that there no safe path from etcd 3.5 to 3.6 except by upgrading to v3.5.26 first.
In mid December, the project released an announcement indicating that there is NO safe path from etcd 3.5 to 3.6 except by upgrading to v3.5.26 first. Failure to do so can cause the cluster to report “zombie members” (etcd nodes that were removed from the cluster some time ago) re-appearing and joining database consensus, ultimately causing the cluster to lose quorum. This updated blog post contradicts previous announcements on this topic, which indicated that it was safe to upgrade from v3.5.20+ as long as nodes had been restarted at least once, to reconcile membership lists across internal storage layers.
The January releases of K3s v1.32 and v1.33 will include etcd v3.5.26. All users should plan on upgrading to this patch release, prior to upgrading to v1.34 and v1.35.
Changes since v1.34.3+k3s1:
- Add firewall section to check-config.sh (#13391)
- Expand docker upgrade test, sunset E2E upgrade test (#13399)
- Allow k3s secrets-encrypt enable on existing clusters (#13404)
- Chore: Bump charts - Jan 2025 (#13421)
- Bump local path provisioner to v0.0.34 (#13427)
- Publish GA images to staging registry (#13436)
- Backports for 2026-01 (#13447)
- Bump to coredns 1.14.0 (#13452)
- Rootless ports: add support for udp (#13460)
- Update Traefik version to v3.6.7 (#13483)
- Bump etcd to v3.6.7 (#13496)
- Update to v1.34.3-k3s2 and Go 1.24.11 (#13513)
- Update to v1.34.3-k3s3 and Go 1.24.11 (#13522)
- Fix restart of control-plane-only nodes attempting to reconcile from local datastore (#13536)
Embedded Component Versions
| Component | Version |
|---|---|
| Kubernetes | v1.34.3 |
| Kine | v0.14.10 |
| SQLite | 3.51.1 |
| Etcd | v3.6.7-k3s1 |
| Containerd | v2.1.5-k3s1 |
| Runc | v1.4.0 |
| Flannel | v0.28.0 |
| Metrics-server | v0.8.0 |
| Traefik | v3.6.7 |
| CoreDNS | v1.14.0 |
| Helm-controller | v0.16.17 |
| Local-path-provisioner | v0.0.34 |
Helpful Links
As always, we welcome and appreciate feedback from our community of users. Please feel free to:
- Open issues here
- Join our Slack channel
- Check out our documentation for guidance on how to get started or to dive deep into K3s.
- Read how you can contribute here
What's Changed
- [release-1.34] Fix restart of control-plane-only nodes attempting to reconcile from local datastore by @brandond in #13536
Full Changelog: v1.34.3-rc1+k3s3...v1.34.3+k3s3