1.26 Release notes

1.26+ck4 Bugfix release

June 19, 2023 - charmed-kubernetes --channel 1.26/stable

Fixes

Two bug fixes related to the kubeapi-load-balancer charm have been backported from Charmed Kubernetes 1.27:

• Kubernetes API Load Balancer LP#2017814

  nginx configuration is missing on non-leader units when VIP is set.

• Kubernetes API Load Balancer LP#2017812

  ha-cluster-vip not correctly written to kubeconfig.

1.26+ck3 Bugfix release

March 20, 2023 - charmed-kubernetes --channel 1.26/stable

Fixes

Notable fixes in this release include:

• Kubernetes Control Plane LP#1989362

  Resolves a hook error when related to vault but the vault api endpoint is not ready

• Kubernetes Control Plane LP#1999542

  Resolves an issue where the charm incorrectly presumes a one-time vault token has been used successfully to create a secret.

• ETCD LP#2008267

  Resolves a race-condition which occurs when etcd sends cluster information before its api endpoint is available, causing both it and calico to stall during deployment.

• Vsphere Cloud Provider LP#2010233

  Resolves an issue where the sync-manifest action could result in pods described with the wrong image.

• Vsphere Cloud Provider LP#2009965

  Resolves an issue where the charm is stuck in Maintenance state after running a sync-manifest action.

1.26+ck2 Bugfix release

February 27, 2023 - charmed-kubernetes --channel 1.26/stable

Fixes

Notable fixes in this release include:

• Kubernetes Autoscaler LP#2007182

  Update the autoscaler image for use with newer Juju controllers.

• Etcd LP#1997531

  Restrict non-root access to etcd snap data directory.

• Kubernetes Control Plane LP#2007174

  Restrict non-root access to the script responsible for synchronizing control-plane leader files to followers.

• Bundles LP#

  Add missing bundle overlays for AWS/GCE cloud storage providers.

1.26+ck1 Bugfix release

January 16, 2023 - charmed-kubernetes --channel 1.26/stable

The release bundle can also be downloaded here.

Fixes

Notable fixes in this release include:

• Kubernetes Control Plane / Octavia LP#1990494

  Resolves an issue which made it impossible to delete a kubernetes service when octavia loadbalancers are detected

• Kubernetes Control Plane / Octavia LP#1995746

  Adds support to disable openstack loadbalancer integration

• Kubernetes Control Plane / Ceph LP#1998257

  Resolves an issue where the csi-rbdplugin pod cannot start if the control-plane unit is running in a LXD machine.

• Containerd #LP2002593

  Resolves issue with flooding /var/log/syslog with messages about a deprecation of io.containerd.runc.v1

• CoreDNS LP#2002698

  Upgrade of the coredns image from 1.6.7 to 1.10.0

• ops.lib-manifest library LP#1999427

  Resolves an issue where a charm hook fails rather than retrying when the kubernetes-api is available.

• SRIOV CNI/Network Device Plugin LP#2002186

  Add support for control-plane node toleration for SRIOV daemonsets

1.26

December 15, 2022 - charmed-kubernetes --channel 1.26/stable

The release bundle can also be downloaded here.

What’s new

• Ubuntu 22.04 default series

Ubuntu 22.04 is now the default series for new deployments of Charmed Kubernetes.

Ubuntu 20.04 remains fully supported, but is no longer the default series.

Ubuntu 18.04 is no longer supported. For existing clusters still running Ubuntu 18.04, it is recommended to perform a series upgrade to Ubuntu 20.04 before upgrading to Charmed Kubernetes 1.26.

• Kube-OVN BGP support

The Kube-OVN charm’s new bgp-speakers config option makes it possible to peer Kubernetes nodes with external BGP routers and exchange routing information for Kube-OVN subnets. This makes it possible to access pod IPs directly from external networks.

• Kube-OVN traffic mirroring

The new enable-global-mirror and mirror-iface config options make it possible to configure traffic mirroring for Kube-OVN. When configured, Kube-OVN will mirror pod network traffic to a network interface on each Kubernetes node, making it easier to observe pod network traffic with tools such as tcpdump.

• MetalLB enhancements

The metallb-controller and metallb-speaker charms have been upgraded to v0.12 and can now run on amd64, arm, arm64, ppc64le, and s390x hosts.

Component Versions

Charm/Addons pinned versions

• kube-ovn 1.10.4
• calico 3.21.4
• cephcsi 3.7.2
• cinder-csi-plugin 1.25.3
• coredns 1.9.4
• ingress-nginx 1.2.0
• k8s-keystone-auth 1.25.3
• kube-state-metrics 2.6.0
• kubernetes-dashboard 2.7.0
• openstack-cloud-controller-manager 1.25.3

Charm default versions

• cloud-provider-vsphere 1.24
• vsphere-csi-driver 2.6.0
• cloud-provider-azure 1.25.0
• azuredisk-csi-driver 1.23.0

Fixes

A list of bug fixes and other minor feature updates in this release can be found at the launchpad milestone page for 1.26.

Notes and Known Issues

A list of issues to be fixed in the first 1.26 maintenance release can be found at the launchpad milestone page for 1.26+ck1.

• LP1999427 Charm errors during update-status hook with 502 Gateway Error

  The charm’s status may appear like this:

    aws-k8s-storage/0*         error        idle                54.80.73.214                    hook failed: "update-status"
  

  When the affected charms are deployed on a cloud with a kube-api-loadbalancer, the load-balancer can respond to client requests with a 502 Gateway Error, amongst other error statuses not produced by the API server itself. The charm’s kubernetes client library raises an unhandled exception in this case. This results is the charm being in an error state which is easily resolved by running

  juju resolve <charm/unit>
  

Deprecations and API changes

• Upstream

For details of other deprecation notices and API changes for Kubernetes 1.26, please see the relevant sections of the upstream release notes.