Merge branch 'master' of https://github.com/kubernetes/kubernetes.github.io into release-1.8

* 'master' of https://github.com/kubernetes/kubernetes.github.io:
  ZTE-SH-CN-debug-pod-replication-controller-2017-09-14-14
  ZTE-SH-CN-define-command-argument-container (#5381)
  Update index.md
  Update Kompose docs
  Improve host aliases page (#5443)
  Add link to AlwaysPullImages admission controller
  Revert "create homepage for user journeys"
  create homepage for user journeys
  fix the command output
  ZTE-SH-CN-run-application-run-single-instance-stateful-application-pr-2017-… (#5363)
  Add a note to static pod manifest scanning
  revert WordPress and MySQL PV doc changes to use apps/v1beta2 APIs (#5461)
  Fix pod probes yaml file
  Redirect v1 docs. (#5460)
  Fix error link (#5459)
  Fix typo in deployment documentation

# Conflicts:
#	docs/tutorials/stateful-application/basic-stateful-set.md

docs/tutorials/stateful-application/mysql-wordpress-persistent-volume/mysql-deployment.yaml

@@ -25,17 +25,13 @@ spec:
     requests:
       storage: 20Gi
 ---
-apiVersion: apps/v1beta2
+apiVersion: extensions/v1beta1
 kind: Deployment
 metadata:
   name: wordpress-mysql
   labels:
     app: wordpress
 spec:
-  selector:
-    matchLabels:
-      app: wordpress
-      tier: mysql
   strategy:
     type: Recreate
   template:

docs/tutorials/stateful-application/mysql-wordpress-persistent-volume/wordpress-deployment.yaml

@@ -25,17 +25,13 @@ spec:
     requests:
       storage: 20Gi
 ---
-apiVersion: apps/v1beta2
+apiVersion: extensions/v1beta1
 kind: Deployment
 metadata:
   name: wordpress
   labels:
     app: wordpress
 spec:
-  selector:
-    matchLabels:
-      app: wordpress
-      tier: frontend
   strategy:
     type: Recreate
   template: