container_aria

my file learn about tech container (docker, podman, kubernetes)

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Persistent Volume

• persistent volume sebenernya hampir mirip dengan volume
  • hanya saja cara kerjanya beda
• cara pembuatan persistent volume sedikit lebih ribet dibanding volume
  • namun ada beberapa benefit yang bisa didapatkan jika menggunakan persistent volume

jenis jenis persistent volume

• HostPath => berkas disimpan di Node, (tidak direkoemndasikan di production, hanya untuk testing)
• GCEPersistentDisk => (GCPD => Google Cloud Persistent Disk)
• AWS ElasticBlockStore => AWS Persistent Disk
• Azure file / Azure Disk => Microsoft Azure Persistent Disk

tahapan persistent volume

• membuat persistent volume
• membuat persistent volume Claim
• menambahkan persistent volume Claim ke Pod

command

kubectl create -f persistentVolume.yaml

kubectl get pv
kubectl describe pv <name_pv>
kubectl get pvc # persistent volume claim
kubectl describe pvc <name_pvc>

kubectl delete pv <name_pv>
kubectl delete pvc <name_pvc>

template

apiVersion: v1
kind: PersistentVolume
metadata:
  name: persistent-volume-name
spec:
  accessModes:
    - ReadWriteOnce
  capacity:
    storage: 5Gi
  hostPath:
    path: /data/location

---

apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: persistent-volume-claim-name
spec:
  accessModes:
    - ReadWriteOnce
  volumeMode: Filesystem
  resources:
    requests:
      storage: 1Gi

example

apiVersion: v1
kind: PersistentVolume
metadata:
  name: nodejs-writer-volume
spec:
  accessModes:
    - ReadWriteOnce
  capacity:
    storage: 5Gi
  hostPath:
    path: /data/location

---

apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: nodejs-writer-volume-claim
spec:
  accessModes:
    - ReadWriteOnce
  volumeMode: Filesystem
  resources:
    requests:
      storage: 1Gi

---

apiVersion: v1
kind: Pod
metadata:
  name: nodejs-writer
  labels:
    name: nodejs-writer
spec:
  volumes:
    - name: html
      persistentVolumeClaim:
        claimName: nodejs-writer-volume-claim
  containers:
    - name: nodejs-writer
      image: khannedy/nodejs-writer
      volumeMounts:
        - mountPath: /app/html
          name: html

run

kubectl create -f 04\ -\ persistent-volume.yaml

kubectl get -f 04\ -\ persistent-volume.yaml
kubectl exec -it nodejs-writer -- /bin/sh
/ # ls /app/html/
# index.html