Created
April 29, 2020 20:52
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Node remediation with the magic of chroot
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| kubectl run -i --rm --tty photonos-on-host --overrides=' | |
| { | |
| "spec": { | |
| "containers": [ | |
| { | |
| "name": "photonos-on-host", | |
| "image": "photon:3.0", | |
| "args": ["bash"], | |
| "stdin": true, | |
| "stdinOnce": true, | |
| "tty": true, | |
| "volumeMounts": [ | |
| { | |
| "mountPath": "/host/", | |
| "name": "hostpath-mount" | |
| } | |
| ] | |
| } | |
| ], | |
| "volumes": [ | |
| { | |
| "name": "hostpath-mount", | |
| "hostPath": { | |
| "path": "/" | |
| } | |
| } | |
| ] | |
| } | |
| } | |
| ' --image=photon:3.0 --restart=Never -- bash |
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| apiVersion: v1 | |
| kind: ConfigMap | |
| metadata: | |
| name: node-remediation | |
| labels: | |
| yum: node-remediation | |
| data: | |
| remediate.sh: | | |
| #!/usr/bin/env bash | |
| set -euo pipefail | |
| HOSTPATH_VOLUME="${HOSTPATH_VOLUME:-/host}" | |
| echo "Making package cache" | |
| chroot "${HOSTPATH_VOLUME}" yum makecache | |
| echo "Adding NFS-Utils" | |
| chroot "${HOSTPATH_VOLUME}" yum install -y nfs-utils | |
| --- | |
| apiVersion: apps/v1 | |
| kind: DaemonSet | |
| metadata: | |
| name: node-remediation | |
| spec: | |
| selector: | |
| matchLabels: | |
| yum: node-remediation | |
| updateStrategy: | |
| type: RollingUpdate | |
| template: | |
| metadata: | |
| labels: | |
| name: node-remediation | |
| yum: node-remediation | |
| spec: | |
| initContainers: | |
| - image: photon:3.0 | |
| name: node-initializer | |
| command: ["/run/remediate.sh"] | |
| env: | |
| - name: HOSTPATH_VOLUME | |
| value: /host | |
| securityContext: | |
| privileged: true | |
| volumeMounts: | |
| - name: hostpath-mount | |
| mountPath: /host | |
| - name: node-remediation | |
| mountPath: /run/remediate.sh | |
| subPath: remediate.sh | |
| containers: | |
| - image: "registry.tkg.vmware.run/pause:3.1" | |
| name: pause | |
| volumes: | |
| - name: hostpath-mount | |
| hostPath: | |
| path: / | |
| - name: node-remediation | |
| configMap: | |
| name: node-remediation | |
| defaultMode: 0744 |
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