ReplicationController 和 ReplicaSet

    2. kind: ReplicaSet
    3. metadata:
    4.   name: frontend
    5.   # these labels can be applied automatically
    6.   # from the labels in the pod template if not set
    7.   # labels:
    8.     # app: guestbook
    9.     # tier: frontend
    10. spec:
    11.   # this replicas value is default
    12.   # modify it according to your case
    13.   # selector can be applied automatically
    14.   # from the labels in the pod template if not set,
    16.   # demonstrate its usage.
    17.   selector:
    18.     matchLabels:
    19.       tier: frontend
    20.     matchExpressions:
    21.       - {key: tier, operator: In, values: [frontend]}
    22.   template:
    23.     metadata:
    24.       labels:
    25.         app: guestbook
    26.         tier: frontend
    27.     spec:
    28.       - name: php-redis
    30.         resources:
    31.           requests:
    32.             cpu: 100m
    33.             memory: 100Mi
    34.         env:
    35.         - name: GET_HOSTS_FROM
    36.           value: dns
    37.           # If your cluster config does not include a dns service, then to
    38.           # instead access environment variables to find service host
    39.           # info, comment out the 'value: dns' line above, and uncomment the
    40.           # line below.
    41.           # value: env
    42.         ports: