一 Pod资源清单

1 Pod分类（非官方）

Pod 定义测试Pod
ReplicationController 副本控制器
ReplicaSet 副本集控制器
Deployment 无状态副本集
StatefulSet 有状态副本集
DaemonSet 守护Pod
Job、Cronjob 作业
HPA：Horizontal Pod Autoscaling

2 Pod的创建方式

基于命令行创建Pod
基于资源清单创建Pod，资源清单为yaml格式

3 命令行创建Pod

# kubectl run nginx-deploy --image=nginx:1.14-alpine --port=80 --replicas=1 --dry-run=true <测试运行是否报错>
# kubectl run nginx-deploy --image=nginx:1.14-alpine --port=80 --replicas=1 <创建Pod>

4 资源清单

4.1 资源清单定义获方法

# kubectl explain pods
KIND:     Pod
VERSION:  v1

DESCRIPTION:
     Pod is a collection of containers that can run on a host. This resource is
     created by clients and scheduled onto hosts.

FIELDS:
   apiVersion	<string>
     APIVersion defines the versioned schema of this representation of an
     object. Servers should convert recognized schemas to the latest internal
     value, and may reject unrecognized values. More info:
     https://git.k8s.io/community/contributors/devel/api-conventions.md#resources

   kind	<string>
     Kind is a string value representing the REST resource this object
     represents. Servers may infer this from the endpoint the client submits
     requests to. Cannot be updated. In CamelCase. More info:
     https://git.k8s.io/community/contributors/devel/api-conventions.md#types-kinds

   metadata	<Object>
     Standard object's metadata. More info:
     https://git.k8s.io/community/contributors/devel/api-conventions.md#metadata

   spec	<Object>
     Specification of the desired behavior of the pod. More info:
     https://git.k8s.io/community/contributors/devel/api-conventions.md#spec-and-status

   status	<Object>
     Most recently observed status of the pod. This data may not be up to date.
     Populated by the system. Read-only. More info:
     https://git.k8s.io/community/contributors/devel/api-conventions.md#spec-and-status

# kubectl explain pods.metadata
KIND:     Pod
VERSION:  v1

RESOURCE: metadata <Object>

DESCRIPTION:
     Standard object's metadata. More info:
     https://git.k8s.io/community/contributors/devel/api-conventions.md#metadata

     ObjectMeta is metadata that all persisted resources must have, which
     includes all objects users must create.

FIELDS:
   annotations	<map[string]string>
     Annotations is an unstructured key value map stored with a resource that
     may be set by external tools to store and retrieve arbitrary metadata. They
     are not queryable and should be preserved when modifying objects. More
     info: http://kubernetes.io/docs/user-guide/annotations

   clusterName	<string>
     The name of the cluster which the object belongs to. This is used to
     distinguish resources with same name and namespace in different clusters.
     This field is not set anywhere right now and apiserver is going to ignore
     it if set in create or update request.

	......

   labels	<map[string]string>
     Map of string keys and values that can be used to organize and categorize
     (scope and select) objects. May match selectors of replication controllers
     and services. More info: http://kubernetes.io/docs/user-guide/labels

   name	<string>
     Name must be unique within a namespace. Is required when creating
     resources, although some resources may allow a client to request the
     generation of an appropriate name automatically. Name is primarily intended
     for creation idempotence and configuration definition. Cannot be updated.
     More info: http://kubernetes.io/docs/user-guide/identifiers#names

   namespace	<string>
     Namespace defines the space within each name must be unique. An empty
     namespace is equivalent to the "default" namespace, but "default" is the
     canonical representation. Not all objects are required to be scoped to a
     namespace - the value of this field for those objects will be empty. Must
     be a DNS_LABEL. Cannot be updated. More info:
     http://kubernetes.io/docs/user-guide/namespaces

	.....

# kubectl explain pods.spec
KIND:     Pod
VERSION:  v1

RESOURCE: spec <Object>

DESCRIPTION:
     Specification of the desired behavior of the pod. More info:
     https://git.k8s.io/community/contributors/devel/api-conventions.md#spec-and-status

     PodSpec is a description of a pod.

FIELDS:
   activeDeadlineSeconds	<integer>
     Optional duration in seconds the pod may be active on the node relative to
     StartTime before the system will actively try to mark it failed and kill
     associated containers. Value must be a positive integer.

   affinity	<Object>
     If specified, the pod's scheduling constraints

   automountServiceAccountToken	<boolean>
     AutomountServiceAccountToken indicates whether a service account token
     should be automatically mounted.

   containers	<[]Object> -required-
     List of containers belonging to the pod. Containers cannot currently be
     added or removed. There must be at least one container in a Pod. Cannot be
     updated.

	......

   volumes	<[]Object>
     List of volumes that can be mounted by containers belonging to the pod.
     More info: https://kubernetes.io/docs/concepts/storage/volumes

# kubectl explain pods.spec.containers

4.2 Pod资源清单

apiVersion: v1
kind: Pod
metadata:
  name: myapp
  namespace: default
spec:
  containers:
  - name: myapp
    image: ikubernetes/myapp:v1
    ports:
    - name: http
      containerPort: 80

4.3 ReplicaSet资源清单

apiVersion: apps/v1
kind: ReplicaSet
metadata:
  name: myapp
  namespace: default
spec:
  replicas: 2
  selector:
    matchLabels:
      app: myapp
      release: canary
  template:
    metadata:
      name: myapp-pod
      labels: 
        app: myapp
        release: canary
        environment: qa
    spec:
      containers:
      - name: myapp-containers
        image: ikubernetes/myapp:v1
        ports:
        - name: http
          containerPort: 80

4.4 Deployment资源清单

apiVersion: apps/v1
kind: Deployment
metadata:
  name: myapp-deploy
  namespace: default
spec:
  replicas: 3
  selector:
    matchLabels:
      app: myapp
      release: canary
  template:
    metadata:
      labels:
        app: myapp
        release: canary
    spec:
      containers:
      - name: myapp
        image: ikubernetes/myapp:v1
        ports:
        - name: http
          containerPort: 80

4.5 DaemonSet资源清单

apiVersion: extensions/v1beta1
kind: DaemonSet
metadata:
  name: myapp-ds
  namespace: default
spec:
  selector:
    matchLabels:
      app: myapp
      release: canary
  template:
    metadata:
      labels:
        app: myapp
        release: canary
    spec:
      containers:
      - name: myapp-containers
        image: ikubernetes/myapp:v2
        ports:
        - name: http
          containerPort: 80

4.6 内网测试环境服务资源清单

apiVersion: apps/v1
kind: Deployment
metadata:
  name: admin-aws
  namespace: default
spec:
  replicas: 1
  selector:
    matchLabels:
      service: aws
      module: admin
  template:
    metadata:
      labels:
        service: aws
        module: admin
    spec:
      containers:
      - name: aws
        image: registry.cn-beijing.aliyuncs.com/sioeye_disney/youle_admin_aws:$COMMITID
        ports:
        - name: http
          containerPort: 8004
        volumeMounts:
        - name: config
          mountPath: /sioeye_apps/workspace/startup_jar.sh
          subPath: startup_jar.sh
        - name: logs
          mountPath: /sioeye_apps/logs
      imagePullSecrets:
      - name: docker-aliyun
      volumes:
      - name: config
        configMap:
          name: config-aws
      - name: logs
        hostPath:
          path: /Sioeye/Data/logs/youle_admin_aws
          type: DirectoryOrCreate