storage introduction

08-storage/intro/01-2-emptydir-pod.yaml

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+apiVersion: v1
+kind: Pod
+metadata:
+  name: test-pd
+spec:
+  containers:
+  - image: nginx:1.7.9
+    name: test-container
+    volumeMounts:
+    - mountPath: /usr/share/nginx/html
+      name: cache-volume
+  initContainers:
+  - name: git-code-downlaod
+    image: alpine/git
+    command: ['sh', '-c', 'git clone https://github.com/wlsf82/helloworld.git; mv * /cache ']
+    volumeMounts:
+    - mountPath: /cache
+      name: cache-volume
+  volumes:
+  - name: cache-volume
+    emptyDir: {}

08-storage/intro/01-3-emptydir-pod.yaml

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+apiVersion: v1
+kind: Pod
+metadata:
+  name: test-pd
+spec:
+  containers:
+  - image: nginx:1.7.9
+    name: test-container
+    volumeMounts:
+    - mountPath: /usr/share/nginx/html
+      name: cache-volume
+  - name: git-code-downlaod
+    image: alpine/git
+    command: ['sh', '-c', 'while true; do rm -rdf /cache/*; git clone https://github.com/wlsf82/helloworld.git; mv -f helloworld/  /cache; sleep 30; done; ']
+    volumeMounts:
+    - mountPath: /cache
+      name: cache-volume
+  volumes:
+  - name: cache-volume
+    emptyDir: {}

08-storage/intro/01-4-emptydir-pod.yaml

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+apiVersion: v1
+kind: Pod
+metadata:
+  name: test-pd
+spec:
+  containers:
+  - image: nginx:1.7.9
+    name: test-container
+    volumeMounts:
+    - mountPath: /usr/share/nginx/html
+      name: cache-volume
+  initContainers:
+  - name: template-changer
+    image: alpine/git
+    command: ['sh', '-c', 'cp /conf/*  /cache; chmod +x /cache/*']
+    volumeMounts:
+    - mountPath: /cache
+      name: cache-volume
+    - mountPath: /conf
+      name: conf
+    
+  volumes:
+  - name: cache-volume
+    emptyDir: {}
+  - name: conf
+    configMap:
+     name: mysql-conn

08-storage/intro/01-emptydir-pod.yaml

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+apiVersion: v1
+kind: Pod
+metadata:
+  name: test-pd
+spec:
+  containers:
+  - image: nginx:1.7.9
+    name: test-container
+    volumeMounts:
+    - mountPath: /cache
+      name: cache-volume
+  volumes:
+  - name: cache-volume
+    emptyDir: {}

08-storage/intro/02-emptydir-memory.yaml

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+apiVersion: v1
+kind: Pod
+metadata:
+  name: test-pd
+spec:
+  containers:
+  - image: nginx:1.7.9
+    name: test-container
+    volumeMounts:
+    - mountPath: /cache
+      name: cache-volume
+  volumes:
+  - name: cache-volume
+    emptyDir:
+      medium: Memory
+      sizeLimit: "1Gi"

08-storage/intro/04-downwardapi.yaml

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+apiVersion: v1
+kind: Pod
+metadata:
+  name: nginx-pd
+  labels:
+    zone: us-est-coast
+    cluster: test-cluster1
+    rack: rack-22
+  annotations:
+    build: two
+    builder: john-doe
+spec:
+  containers:
+    - name: nginx-pd
+      image: nginx:1.7.9
+      volumeMounts:
+        - name: podinfo
+          mountPath: /etc/podinfo
+          readOnly: false
+  volumes:
+    - name: podinfo
+      downwardAPI:
+        items:
+          - path: "labels"
+            fieldRef:
+              fieldPath: metadata.labels
+          - path: "annotations"
+            fieldRef:
+              fieldPath: metadata.annotations

08-storage/intro/Readme.md

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+
+### EmptyDir 
+```bash
+vim 01-2-emptydir-pod.yaml
+kubectl apply -f 01-2-emptydir-pod.yaml
+kubectl port-forward test-pd 8080:80
+curl -XGET http://localhost:8080/helloworld/helloworld.html
+kubectl delete -f 01-2-emptydir-pod.yaml
+```
+
+### Bad Practice
+```bash
+kubectl apply -f 01-3-emptydir-pod.yaml
+kubectl port-forward test-pd 8080:80
+curl -XGET http://localhost:8080/helloworld/helloworld.html
+kubectl delete -f 01-3-emptydir-pod.yaml
+```
+
+### Secret Volume
+```bash
+echo mysql://root:topsecretpassword@remote_mysql:3306/acedemand > mysql.conn
+kubectl create secret generic mysqlconnection --from-file=mysql.conn
+kubectl apply -f 03-secretdir.yaml
+kubectl exec -it test-pd  -- /bin/sh
+ls /secret
+cat /secret/mysql.conn
+```
+
+### configmap readonly
+```bash
+kubectl create configmap mysql-conn --from-file mysql.conn
+kubectl apply -f 01-4-emptydir-pod.yaml
+kubectl exec -it test-pd -- /bin/sh
+cd /usr/share/nginx/html
+ls -lart
+# find executable rights
+kubectl delete configmap mysql-conn
+kubectl delete -f 01-4-emptydir-pod.yaml
+```
+
+
+
+
+

08-storage/intro/mysql.conn

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+mysql://root:topsecretpassword@remote_mysql:3306/acedemand