𝐊𝐮𝐛𝐞𝐫𝐧𝐞𝐭𝐞𝐬 1.28 Some Exciting Features

Quick walkthrough around K8s 1.28 release changes

Overview

Kubernetes has swiftly become the de facto container orchestration platform for delivering and maintaining containerized applications at scale.

Kubernetes release 1.28

Let’s Dive

The release 1.28 includes 45 improvements. 19 of the improvements are moving into 𝐀𝐥𝐩𝐡𝐚, 14 have moved on to 𝐁𝐞𝐭𝐚, and 12 have moved on to 𝐒𝐭𝐚𝐛𝐥𝐞.

Sidecar 𝐜𝐨𝐧𝐭𝐚𝐢𝐧𝐞𝐫 𝐚𝐰𝐚𝐫𝐞𝐧𝐞𝐬𝐬

• To identify when an init container is also a sidecar container, Kubernetes 1.28 adds an alpha restartPolicy field for init containers. If restartPolicy is set K8s will treat the init container as sidecar.
• If the sidecar container fails to start, it will be restarted unless the restartPolicy is Never. In that case entire pod will fail.

spec:
  initContainers:
  - name: init-svc
    image: busybox
  - name: istio-proxy
    image: istio/proxyv2
    args: ["proxy", "sidecar"]
    restartPolicy: Always

𝐕𝐚𝐥𝐢𝐝𝐚𝐭𝐢𝐧𝐠 𝐚𝐝𝐦𝐢𝐬𝐬𝐢𝐨𝐧 𝐏𝐨𝐥𝐢𝐜𝐢𝐞𝐬 (𝐁𝐞𝐭𝐚)

• ValidatingAdmissionPolicies to beta, As an alternative to verifying admission…