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Release notes

1.23

December 15, 2021 - charmed-kubernetes-862

What's new

  • CNI support added to kubernetes-master

The core CNI plugins have been added to kubernetes-master, and the CNI subordinate charms have been updated to render CNI configuration when attached to kubernetes-master. These changes pave the way for Kubelet to be added to kubernetes-master in a future release.

  • Grafana dashboard for etcd

The etcd charm can now be related to the Prometheus and Grafana charms. When doing so, a new Grafana dashboard will be created that makes it easier to monitor the performance characteristics of etcd.

Component upgrades

  • kube-dns 1.21.1 (note: coredns 1.8.3 is the default DNS provider)
  • metrics-server 0.5.1

Fixes

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

Notes and Known Issues

Snaps may fail to install when the kubernetes-master charm is deployed to a LXD container. This happens when the version of snapd on the host does not match the version inside the container. As a workaround, ensure the same version of snapd is installed on the host and in LXD containers.

  • LP 1936816 and LP 1913228 Filesystem Hierachy Standards

    Applications running inside a kubernetes-master should set pid files and log files in appropriate operational locations like /run/ and /var/log/kubernetes/. Care was taken to restart services using these new locations and migrate some existing files out of /root/cdk/.

    For the service cdk.master.auth-webhook the new pid file and log files are named /run/cdk.master.auth-webhook.pid and /var/log/kubernetes/cdk.master.auth-webhook.log to match the systemctl service name.

    If the filebeat charm is related to kubernetes-master, ensure that its logpath include this new path ( e.g. juju config filebeat logpath='/var/log/kubernetes/*.log' )

Deprecations and API changes

  • Upstream

For details of other deprecation notices and API changes for Kubernetes 1.23, please see the relevant sections of the [upstream release notes][upstream-changelog-1.23].

What's new

  • Configurable default PodSecurityPolicy

A new pod-security-policy config option has been added to the kubernetes-master charm. This option allows you to override the default PodSecurityPolicy that is created by the charm.

  • Configurable Nvidia APT sources

New config options have been added to the containerd charm: nvidia_apt_key_urls, nvidia_apt_sources, and nvidia_apt_packages. These provide better support for Nvidia GPUs in air gapped deployments by allowing you to specify where the Nvidia Container Runtime and CUDA packages are pulled from.

  • Better OpenStack credential handling

The openstack-integrator charm now checks for updated cloud credentials from Juju every time its update-status hook runs, ensuring that cloud credentials are properly detected a short time after they change. To expedite this process, you can use the new openstack-integrator charm's new refresh-credentials action to force a recheck immediately.

Fixes

A list of bug fixes and other minor feature updates in this release can be found at the launchpad milestone page for 1.22+ck1.

1.22

September 1, 2021 - charmed-kubernetes-761

What's new

  • Calico BGP Service IP Advertisement

The Calico charm now supports advertising Kubernetes service IPs using Border Gateway Protocol (BGP). More information can be found in the CNI with Calico page.

  • Improved load balancer provider support

Support for load balancing the Kubernetes control plane is being improved with two new relation endpoints: loadbalancer-external and loadbalancer-internal. This change adds support for Azure native load balancers for the Kubernetes control plane, and improves LB configurability while still simplifying the relations needed between the various components of the cluster.

Component upgrades

  • cephcsi 3.3.1 (note: see upstream notes if upgrading from a previous release)
  • kube-dns 1.17.3 (note: coredns 1.8.3 is the default DNS provider)
  • nginx-ingress 1.0.0-beta.3
  • metrics-server 0.5.0

Fixes

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

Notes and Known Issues

  • LP 1935992 Code cleanup

    Previously deprecated features have been removed in this release. This includes the following kubernetes-master features:

    • addons-registry config
    • create-rbd-pv action and related templates
    • monitoring-storage config
    • kube-dns interface
    • migrate_from_pre_snaps code

    The following deprecated kubernetes-worker features have been removed in this release:

    • allow-privileged config
    • kube-dns interface
    • registry action and related templates
    • code paths for k8s < 1.10

  • LP 1907153 Snap install failure in LXD

    Snaps may fail to install when the kubernetes-master charm is deployed to a LXD container. This happens when the version of snapd on the host does not match the version inside the container. As a workaround, ensure the same version of snapd is installed on the host and in LXD containers.

Deprecations and API changes

  • Upstream

    For details of other deprecation notices and API changes for Kubernetes 1.22, please see the relevant sections of the upstream release notes.

Previous releases

Please see this page for release notes of earlier versions.