jenting

apiVersion: v1
kind: Pod
metadata:
  name: workspace-pod-test
  namespace: default
spec:
  restartPolicy: Always
  containers:
  - name: volume-pv-test
    image: nginx:stable-alpine

jenting

apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: block-dev
spec:
  accessModes:
    - ReadWriteOnce
  volumeMode: Block
  storageClassName: rook-ceph-block
  resources:

jenting

ubuntu@jenting-fi6ed5eb054c:~$ lsblk -f
NAME FSTYPE FSVER LABEL UUID                                 FSAVAIL FSUSE% MOUNTPOINTS
loop0
     squash 4.0                                                    0   100% /snap/core20/1405
loop1
     squash 4.0                                                    0   100% /snap/core18/2409
loop2
     squash 4.0                                                    0   100% /snap/google-cloud-sdk/243
loop3
     squash 4.0                                                    0   100% /snap/lxd/22923

jenting

$ k get pvc
NAME                                      STATUS   VOLUME                                     CAPACITY   ACCESS MODES   STORAGECLASS   AGE
data-mysql-0                              Bound    pvc-ed1a2fba-a9fd-438c-818b-97d476ea39b3   8Gi        RWO            local-path     18m
minio                                     Bound    pvc-309d7f89-5543-4cd2-bdd2-9be1af2840bf   8Gi        RWO            local-path     18m
redis-data-openvsx-proxy-0                Bound    pvc-71c1418b-ca28-49ad-9121-ab685468630a   8Gi        RWO            local-path     18m
registry                                  Bound    pvc-049d75c4-60c6-40c5-a29c-c4421d668f31   10Gi       RWO            local-path     18m
ws-1d836bec-d9c8-4387-94a9-c62de458068c   Bound    pvc-142f660d-572c-46d6-a3a1-54acb1bda82d   30Gi       RWO            csi-gce-pd     3m48s

$ k get sc
NAME                   PROVISIONER             RECLAIMPOLICY   VOLUMEBINDINGMODE      ALLOWVOLUMEEXPANSION   AGE

jenting

https://danielmangum.com/posts/controller-runtime-client-go-rate-limiting/

jenting

https://kubernetes.io/docs/tasks/extend-kubernetes/custom-resources/custom-resource-definition-versioning/#webhook-conversion
https://kubernetes.io/docs/tasks/extend-kubernetes/custom-resources/custom-resource-definition-versioning/#upgrade-existing-objects-to-a-new-stored-version
https://github.com/kubernetes-sigs/kubebuilder/blob/72f7c2ef3fd42d21756bc04029ecc499daee2533/designs/crd_version_conversion.md
https://github.com/droot/crd-conversion-example
https://pkg.go.dev/sigs.k8s.io/controller-runtime/pkg/webhook/conversion

jenting

package main

import (
	"crypto/sha512"
	"encoding/hex"
	"flag"
	"fmt"
	"io"
	"os"

jenting

CRD


+groupName package
	=<string>  specifies the API group name for this package.

+kubebuilder:deprecatedversion type
	marks this version as deprecated.

	[warning=<string>]

jenting

make build; REPO=quay.io/jenting make package; cat ./bin/latest_image | xargs docker push

jenting

• Scaling k8s daemonset down to zero

kubectl -n kube-system patch daemonset myDaemonset -p '{"spec": {"template": {"spec": {"nodeSelector": {"non-existing": "true"}}}}}'

• Scaling up k8s daemonset

kubectl -n kube-system patch daemonset myDaemonset --type json -p='[{"op": "remove", "path": "/spec/template/spec/nodeSelector/non-existing"}]'