Sì, con init-container è abbastanza semplice:
apiVersion: v1
kind: Pod
metadata:
name: thp-test
spec:
restartPolicy: Never
terminationGracePeriodSeconds: 1
volumes:
- name: host-sys
hostPath:
path: /sys
initContainers:
- name: disable-thp
image: busybox
volumeMounts:
- name: host-sys
mountPath: /host-sys
command: ["sh", "-c", "echo never >/host-sys/kernel/mm/transparent_hugepage/enabled"]
containers:
- name: busybox
image: busybox
command: ["cat", "/sys/kernel/mm/transparent_hugepage/enabled"]
Demo (notare che questa è un'impostazione a livello di sistema):
$ ssh THATNODE cat /sys/kernel/mm/transparent_hugepage/enabled
always [madvise] never
$ kubectl create -f thp-test.yaml
pod "thp-test" created
$ kubectl logs thp-test
always madvise [never]
$ kubectl delete pod thp-test
pod "thp-test" deleted
$ ssh THATNODE cat /sys/kernel/mm/transparent_hugepage/enabled
always madvise [never]
