pod presets

pod-presets/README.md

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+# PodPresets
+
+# Alpha status
+As long as the PodPresets is in alpha status, the following changes need to be made in kops:
+
+```
+spec:
+  kubeAPIServer:
+    enableAdmissionPlugins:
+    - Initializers
+    - NamespaceLifecycle
+    - LimitRanger
+    - ServiceAccount
+    - PersistentVolumeLabel
+    - DefaultStorageClass
+    - DefaultTolerationSeconds
+    - MutatingAdmissionWebhook
+    - ValidatingAdmissionWebhook
+    - NodeRestriction
+    - ResourceQuota
+    - PodPreset
+    runtimeConfig:
+      settings.k8s.io/v1alpha1: "true"
+
+```
+
+# running the demo
+First apply the PodPresets:
+```
+kubectl create -f pod-presets.yaml
+```
+
+Then run the deployments
+```
+kubectl create -f deployments.yaml
+```

pod-presets/deployments.yaml

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+apiVersion: extensions/v1beta1
+kind: Deployment
+metadata:
+  name: deployment-1
+spec:
+  replicas: 3
+  template:
+    metadata:
+      labels:
+        app: myapp
+    spec:
+      containers:
+      - name: k8s-demo
+        image: wardviaene/k8s-demo
+        ports:
+        - name: nodejs-port
+          containerPort: 3000
+---
+apiVersion: extensions/v1beta1
+kind: Deployment
+metadata:
+  name: deployment-2
+spec:
+  replicas: 3
+  template:
+    metadata:
+      labels:
+        app: myapp
+    spec:
+      containers:
+      - name: k8s-demo
+        image: wardviaene/k8s-demo
+        ports:
+        - name: nodejs-port
+          containerPort: 3000

pod-presets/pod-presets.yaml

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+apiVersion: settings.k8s.io/v1alpha1   # you might have to change this after PodPresets become stable 
+kind: PodPreset
+metadata:
+  name: share-credential
+spec:
+  selector:
+    matchLabels:
+      app: myapp
+  env:
+    - name: MY_SECRET
+      value: "123456"
+  volumeMounts:
+    - mountPath: /share
+      name: share-volume
+  volumes:
+    - name: share-volume
+      emptyDir: {}