Add dns policy setting

2017-07-24 17:02:12 +08:00
parent 52b8d44683
commit 77c05ef418
1 changed files with 23 additions and 0 deletions
@@ -234,6 +234,29 @@ nameserver 10.0.0.10
 options ndots:5
 ```

+### DNS Policy
+
+By default, DNS policy for a pod is 'ClusterFirst'. So pods running with hostNetwork cannot resolve DNS names. To have DNS options set along with hostNetwork, you should specify DNS policy explicitly to 'ClusterFirstWithHostNet'. Update the busybox.yaml as following:
+
+```yaml
+apiVersion: v1
+kind: Pod
+metadata:
+  name: busybox
+  namespace: default
+spec:
+  containers:
+  - image: busybox
+    command:
+      - sleep
+      - "3600"
+    imagePullPolicy: IfNotPresent
+    name: busybox
+  restartPolicy: Always
+  hostNetwork: true
+  dnsPolicy: ClusterFirstWithHostNet
+```
+
 #### Quick diagnosis

 Errors such as the following indicate a problem with the kube-dns add-on or associated Services: