1.17+ck2 Bugfix release

March 2, 2020 - charmed-kubernetes-410

Fixes

CephFS is now supported in Charmed Kubernetes. This allows for ReadWriteMany volumes which can be attached to multiple pods. More information can be found in the storage documentation.

Additional bug fixes included in this release can be found at https://launchpad.net/charmed-kubernetes/+milestone/1.17+ck2.

1.17+ck1 Bugfix release

January 15, 2020 - charmed-kubernetes-372

Fixes

We fixed an issue where pod-to-pod network traffic was being unnecessarily masqueraded when using Flannel or Canal. More details can be found at https://launchpad.net/charmed-kubernetes/+milestone/1.17+ck1.

1.17

December 17, 2019 - charmed-kubernetes-335

Before upgrading, please read the upgrade notes.

What's new

CIS Benchmark

The Center for Internet Security (CIS) maintains a Kubernetes benchmark that is helpful to ensure clusters are deployed in accordance with security best practices. See the CIS Compliance documentation for instructions on how to run this compliance benchmark.

Snap Coherence

Beginning with Charmed Kubernetes 1.17, updates to Kubernetes snap packages used by kubernetes-master and kubernetes-worker charms will be applied in a controlled fashion. Known as Snap Coherence, this feature ensures snap updates are first applied to individual master units, followed by workers. If an update fails, the process is aborted before affecting the entire cluster. This feature also allows snap revisions to be controlled by a snap store proxy. See snap coherence documentation for details.

Nagios checks

Additional Nagios checks have been added for the kubernetes-master and kubernetes-worker charms. These checks enhance the monitoring and reporting available via Nagios by collecting data on node registration and API server connectivity.

Improved metrics

kube-state-metrics is now added by default to the cluster when monitoring is enabled. New default dashboards are also included to highlight these metrics with Prometheus/Grafana.

Storage Classes created by default

Storage classes will now be created if the kubernetes-master charm is related to an integrator charm. These classes are for AWS, GCE, OpenStack, and Azure and are named cdk-ebs, cdk-gce-pd, cdk-cinder, and cdk-azure-disk, respectively.

Support for etcd 3.3 and 3.4

Whilst Charmed Kubernetes 1.17 ships with etcd 3.3 by default, it also brings support for running etcd 3.4. To do so, you can simply run the followiung Juju command:

juju config etcd channel=3.4/stable

Component Upgrades

Many of the components in Charmed Kubernetes 1.17 have been upgraded. The following list highlights some of the more notable version changes:

• calico 3.10.1
• coredns 1.6.5
• etcd 3.3
• nfs-provisioner 3.1.0
• nginx-ingress-controller 0.26.1

Fixes

A list of bug fixes and other minor feature updates in this release can be found at https://launchpad.net/charmed-kubernetes/+milestone/1.17.

Notes / Known Issues

• The registry action for the kubernetes-worker charm has been deprecated and will be removed in a future release. To enable a custom container registry, please see the registry documentation.

Previous releases

Please see this page for release notes of earlier versions.