Recently I keep seeing the NTP issue with my custom AMI images. Some reason chrony daemonsets is not working as expected and seeing the intermittent issue. Possibly some configuration problems.
I decide to write a quick Kubernetes daemonsets to fix this problem. Daemoset is running a simple alpine container. And a while loop while true; do hwclock -s; sleep 86400; done, which basically run hwclock -s command sleep for =24_60_60 seconds = 1 day.
apiVersion: apps/v1 kind: DaemonSet metadata: name: ntp-sync labels: k8s-app: ntp-sync spec: selector: matchLabels: name: ntp-sync template: metadata: labels: name: ntp-sync spec: tolerations: - key: node-role.kubernetes.io/master effect: NoSchedule containers: - name: ntp-sync image: alpine command: ["/bin/sh"] args: ["-c", "while true; do hwclock -s; sleep 86400; done"] resources: limits: memory: 20Mi cpu: 20m requests: cpu: 10m memory: 10Mi securityContext: privileged: true