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1、yaml语法

• 两种类型：字典和序列

map:  one: 1  two: 2  three: 3sequence:  - one  - two  - three

• 格式符

coffee: /  Latte  Cappuccino  Espresso#output：Latte\nCappuccino\nEspresso\ncoffee: |-  Latte  Cappuccino  Espresso#output: Latte\nCappuccino\nEspresso (with no trailing \n).减号表示减去末尾换行符（不换行）coffee: |+  Latte  Cappuccino  Espresso#output: Now the value of coffee will be Latte\nCappuccino\nEspresso\n\n\n.加号表示加上末尾换行符（换行）

• YAML Anchors

1、YAML规范提供了一种存储对值的引用，并在以后通过引用引用该值的方法。YAML将此称为“锚定”：

The YAML spec provides a way to store a reference to a value, and later refer to that value by reference. YAML refers to this as “anchoring”:

2、就是先通过引用赋值，然后通过取址的方式取得值

coffee: "yes, please"favorite: &favoriteCoffee "Cappucino" #引用赋值coffees:  - Latte  - *favoriteCoffee #取址来取值  - Espresso  #上面表达式等同为coffee: yes, pleasefavorite: Cappucinocoffees:- Latte- Cappucino- Espresso

注意：Because Helm and Kubernetes often read, modify, and then rewrite YAML files, the anchors will be lost.由于Helm和Kubernetes经常读取，修改然后重写YAML文件，因此锚点将丢失。

2、 资源清单格式

apiversion: group/apiversionversionskind: metadata:  name:  namespace:  labels  annotationsspec:

3、通过YAML创建Pod

apiVersion: v1kind: ReplicationControllermetadata:  name: kikispec:  replicas: 3  selector:    app: kiki  template:    metadata:      labels:        app: kiki    spec:      containers:      - name: kiki        image: centos        imagePullPolicy: IfNotPresent        command:         - "/bin/sh"        - "-c"        - "sleep 3600"

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