added Storage and updated README

README.md

@@ -14,6 +14,8 @@ During the exam, you are allowed to keep only one other browser tab open to refe
 
 - [Cluster - 11%](Cluster.md)
 
+- [Storage - 7%](Storage.md)
+
 
 
 ### Can I PR? There is an error/an alternative way/an extra question/solution I can offer

Storage.md

@@ -0,0 +1,201 @@
+# Storage (7%)
+
+kubernetes.io > Documentation > Reference > kubectl CLI > [kubectl Cheat Sheet](https://kubernetes.io/docs/reference/kubectl/cheatsheet/)
+
+kubernetes.io > Documentation > Concepts > Storage > [Volumes](https://kubernetes.io/docs/concepts/storage/volumes/)
+
+kubernetes.io > Documentation > Concepts > Storage > [Types of Volumes](https://kubernetes.io/docs/concepts/storage/volumes/#types-of-volumes)
+
+kubernetes.io > Documentation > Concepts > Storage > [Persistent Volumes](https://kubernetes.io/docs/concepts/storage/persistent-volumes/)
+
+kubernetes.io > Documentation > Concepts > Storage > [Persistent Volume Claims](https://kubernetes.io/docs/concepts/storage/persistent-volumes/#persistentvolumeclaims)
+
+
+
+### Understand persistent volumes and know how to create them
+
+<details><summary>show</summary>
+<p>
+
+```bash
+$ cat persist-pod-volume.yaml
+
+apiVersion: v1
+kind: Pod
+metadata: 
+  name: persistent-pod
+spec:
+  containers:
+  - name: alpine
+    image: alpine
+    command: ["/bin/sh","-c"]
+    args: ["shuf -i 0-100 -n 1 >> /opt/number.out;"]
+    volumeMounts:
+    - mountPath: /opt
+      name: data-volume
+
+  volumes:
+  - name: data-volume
+    hostPath:
+      path: /data
+      type: Directory
+
+
+$ cat persistent-volume.yaml
+
+apiVersion: v1
+kind: PersistentVolume
+metadata: 
+  name: pv-vol1
+spec: 
+  accessModes:
+     - ReadWriteOnce
+  capacity:
+    storage: 1Gi
+  hostPath:
+    path: /tmp/data
+
+$ kubectl get persistentvolumes
+
+```
+
+</p>
+</details>
+
+### Understand access modes for volumes
+
+<details><summary>show</summary>
+<p>
+
+```bash
+ReadWriteOnce – the volume can be mounted as read-write by a single node
+ReadOnlyMany – the volume can be mounted read-only by many nodes
+ReadWriteMany – the volume can be mounted as read-write by many nodes
+
+```
+
+
+
+</p>
+</details>
+
+### Understand persistent volume claims primitive
+
+<details><summary>show</summary>
+<p>
+
+```
+$ cat pvc.yaml
+
+apiVersion: v1
+kind: PersistentVolumeClaim
+metadata:
+  name: myclaim
+spec:
+  accessModes: 
+  - ReadWriteOnce
+  	persistentVolumeReclaimPolicy: Retain
+  
+  resources:
+    requests:
+      storage: 500Mi
+
+Persistent Volume Reclaim Policies:
+
+Retain: No other claims can claim this volume
+Delete: Delete the volume 
+Recycle: Scrap the data and make the volume available again 
+
+$ kubectl get persistentvolumeclaim
+$ kubectl delete persistentvolumeclaim myclaim
+
+$ cat pvc-claim-pod.yaml
+
+apiVersion: v1
+kind: Pod
+metadata: 
+  name: webapp
+spec:
+  containers:
+  - name: event-simulator
+    image: kodecloud/event-simulator
+    env:
+    - name: Log_Handler
+      value: file
+    volumeMounts:
+    - mountPath: /log
+      name: log-volume
+  volumes:
+  - name: log-vol
+    persistentVolumeClaim:
+      claimName: claim-log-1
+
+```
+
+
+
+</p>
+</details>
+
+
+
+### Understand Kubernetes storage objects
+
+<details><summary>show</summary>
+<p>
+
+```
+Kubernetes supports several types of Volumes:
+
+    awsElasticBlockStore
+    azureDisk
+    azureFile
+    cephfs
+    cinder
+    configMap
+    csi
+    downwardAPI
+    emptyDir
+    fc (fibre channel)
+    flexVolume
+    flocker
+    gcePersistentDisk
+    gitRepo (deprecated)
+    glusterfs
+    hostPath
+    iscsi
+    local
+    nfs
+    persistentVolumeClaim
+    projected
+    portworxVolume
+    quobyte
+    rbd
+    scaleIO
+    secret
+    storageos
+    vsphereVolume
+
+```
+
+
+
+</p>
+</details>
+
+
+
+### Know how to configure applications with persistent storage
+
+<details><summary>show</summary>
+<p>
+
+```
+Create a persistent volume claim
+Use persistent volume claim in pod
+```
+
+
+
+</p>
+</details>