Highlights for the week ending February 16, 2023

Apps

• coredns-app v1.14.2 brings an improvement in scaling. It changes the Pod Disruption Budget from maxUnavailable: 1 to maxUnavailable: 25%. Based on our learnings, we have dropped the static replicas value, and let the Horizontal Pod Autoscaler manage the deployment scaling. At the same time, we have configured, via Config Map, the CoreDNS health checks to 5 seconds minimising DNS resolution failures during a CoreDNS pod restart.
• k8s-dns-node-cache-app v2.0.0 has been released. It introduces a new major version in order to support Cilium CNI in EBPf mode. The new major version should be only used from AWS v19 release and so on.
• kong-app v3.0.0 This release upgrades Kong to release 3.1.1 which contains breaking changes. Please consider reading the upstream Breaking changes documentation before upgrading. Users of Kong enterprise should read the Kong Gateway changelogs of releases 3.0.0.0 onwards up to 3.1.1.3. The release aligns with the upstream chart version, updates kong/kong to 3.1.1 and updates the Kong ingress controller to 2.8.1. Also the custom resource definitions to those used by the Kong ingress controller [2.8.1] got updated. Conclusion: Changes: Increase default requests/limits to 1 CPU and 2G memory and removes startupProbe from the Kong ingress controller. More information. Breaking Changes: The minReadySeconds value previously found at deployment.kong.minReadySeconds is now configured at path deployment.minReadySeconds.
• kong-app v3.0.1 Caution: If you are upgrading from chart version lower than 3.0.0, it is necessary to perform an intermediate upgrade to chart version 3.0.0 as this version contains a required migration process for enabling the use of seccompProfiles. At the same time, it changes the default Pod Disruption Budget to move from maxUnavailable: 1 to maxUnavailable: 25% for better scaling. Also, it includes a fix in Horizontal Pod Autoscaler’s API version which detects and prevents the template issue with the custom `dblessconfigom being mounted.
• nginx-ingress-controller-app v2.24.0 release aligns to latest upstream version and enables the configuration of a default backend. On the other hand, it adds a fix to stop targeting default backend pods with the controller service. Lastly, the release contains a change in the Pod Disruption Budget to move from maxUnavailable: 1 to maxUnavailable: 25% for better scaling.
• linkerd-bundle v0.1.0 With this release we have bundled all relevant linkerd components to one installation. This bundle contains linkerd-multicluster-app, linkerd-multicluster-link-app, linkerd-viz-app, linkerd-control-plane-app and linkerd2-cni-app. As well as examples, templates and helpers.