apiVersion: v1           # Kubernetes API 的版本，对于 Pod 来说，通常是 v1  
kind: Pod                # 要创建的对象的类别，这里是 Pod  
metadata:  name: my-pod           # 对象的名称，在命名空间中必须是唯一的  namespace: default     # 命名空间，如果省略，则默认为 default  # UID 是由 Kubernetes 系统自动生成的，不需要在清单文件中指定  
spec:  containers:            # Pod 规格中定义了容器的列表  - name: my-container   # 容器的名称  image: nginx:1.19.2  # 容器使用的镜像及其标签  # 其他容器配置，如端口、环境变量等...

# 这是一个注释
person:  # 字典的开始name: John Doe  # 字符串age: 30  # 整数married: true  # 布尔值children:  # 列表的开始- name: Jane Doeage: 10- name: Doe Juniorage: 5

kubectl explain deployment
KIND:     Deployment
VERSION:  apps/v1DESCRIPTION:Deployment enables declarative updates for Pods and ReplicaSets.FIELDS:apiVersion  <string>APIVersion defines the versioned schema of this representation of anobject. Servers should convert recognized schemas to the latest internalvalue, and may reject unrecognized values. More info:https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#resourceskind  <string>Kind is a string value representing the REST resource this objectrepresents. Servers may infer this from the endpoint the client submitsrequests to. Cannot be updated. In CamelCase. More info:https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#types-kindsmetadata  <Object>Standard object's metadata. More info:https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#metadataspec  <Object>Specification of the desired behavior of the Deployment.status  <Object>Most recently observed status of the Deployment.

kubectl create deployment jumpoint-web --image=nginx:latest --port=80 --replicas=2 --namespace=jumpoint-ns --dry-run=client --output=yamlapiVersion: apps/v1
kind: Deployment
metadata:creationTimestamp: nulllabels:app: jumpoint-webname: jumpoint-webnamespace: jumpoint-ns
spec:replicas: 2selector:matchLabels:app: jumpoint-webstrategy: {}template:metadata:creationTimestamp: nulllabels:app: jumpoint-webspec:containers:- image: nginx:latestname: nginxports:- containerPort: 80resources: {}
status: {}

#若要查看metadata.labels字段的含义kubectl explain deployment.metadata.labels
KIND:     Deployment
VERSION:  apps/v1FIELD:    labels <map[string]string>DESCRIPTION:Map of string keys and values that can be used to organize and categorize(scope and select) objects. May match selectors of replication controllersand services. More info: http://kubernetes.io/docs/user-guide/labels

#若要查看spec.selector.matchLabels字段的含义（其它字段含义查询方式类似）kubectl explain deployment.spec.selector.matchLabels
KIND:     Deployment
VERSION:  apps/v1FIELD:    matchLabels <map[string]string>DESCRIPTION:matchLabels is a map of {key,value} pairs. A single {key,value} in thematchLabels map is equivalent to an element of matchExpressions, whose keyfield is "key", the operator is "In", and the values array contains only"value". The requirements are ANDed.

#若要查看deployment.spec.template.spec.containers字段下还有哪些字段可用，有时可能要根据实际需求添加一些字段（上边生成的YAML文件略简单）kubectl explain deployment.spec.template.spec.containers
KIND:     Deployment
VERSION:  apps/v1RESOURCE: containers <[]Object>DESCRIPTION:List of containers belonging to the pod. Containers cannot currently beadded or removed. There must be at least one container in a Pod. Cannot beupdated.A single application container that you want to run within a pod.FIELDS:
...imagePullPolicy  <string>Image pull policy. One of Always, Never, IfNotPresent. Defaults to Alwaysif :latest tag is specified, or IfNotPresent otherwise. Cannot be updated.More info:https://kubernetes.io/docs/concepts/containers/images#updating-imagesPossible enum values:- `"Always"` means that kubelet always attempts to pull the latest image.Container will fail If the pull fails.- `"IfNotPresent"` means that kubelet pulls if the image isn't present ondisk. Container will fail if the image isn't present and the pull fails.- `"Never"` means that kubelet never pulls an image, but only uses a localimage. Container will fail if the image isn't present
...

apiVersion: apps/v1
kind: Deployment
metadata:labels:app: jumpoint-web-deployment-labelname: jumpoint-webnamespace: jumpoint-ns
spec:replicas: 2selector:matchLabels:app: jumpoint-web-pod-labeltemplate:metadata:labels:app: jumpoint-web-pod-labelspec:containers:- image: nginx:latestname: jumpoint-web-container-nameimagePullPolicy: Alwaysports:- containerPort: 80protocol: TCPname: http

#使用nginx-deployment.yaml文件创建Deployment资源对象。kubectl create namespace jumpoint-nskubectl apply -f nginx-deployment.yamlkubectl get deployments -n jumpoint-nskubectl get pods -n jumpoint-ns -o widekubectl describe deployment -n jumpoint-ns jumpoint-web