k8s资源配置简单清单

k8s中大部分资源清单包含以下5个字段：

1.apiVersion : group/version

[root@master ~]# kubectl api-versions

包含：

admissionregistration.k8s.io/v1beta1

apiextensions.k8s.io/v1beta1

apiregistration.k8s.io/v1

apiregistration.k8s.io/v1beta1

apps/v1

apps/v1beta1

apps/v1beta2

authentication.k8s.io/v1

authentication.k8s.io/v1beta1

authorization.k8s.io/v1

authorization.k8s.io/v1beta1

autoscaling/v1

autoscaling/v2beta1

autoscaling/v2beta2

batch/v1

batch/v1beta1

certificates.k8s.io/v1beta1

coordination.k8s.io/v1beta1

events.k8s.io/v1beta1

extensions/v1beta1

networking.k8s.io/v1

policy/v1beta1

rbac.authorization.k8s.io/v1

rbac.authorization.k8s.io/v1beta1

scheduling.k8s.io/v1beta1

storage.k8s.io/v1

storage.k8s.io/v1beta1

v1

2.kind: 资源类别

包含：Pod、ReplicaSet、Deployment、StatefulSet、DaemonSet、Job、Cronjob、Service、Ingress、Volume。。。等

 

3.metadata:元数据

name

namespace

labels

annotations

 

每个资源的引用方式：

/api/GROUP/VERSION/namespace/NAMESPACE/TYPE/NAME

 

4. spec:期望的状态 ,disired state

 

5. status:当前状态 current state,本字段由kubernetes集群维护

 

（可以通过kubectl explain 来查找定义）

eg:

 

 

自定义一个简单的yaml文件

vim pod-demo.yaml

 

apiVersion: v1

kind: Pod

metadata:

name: pod-demo

namespace: default

labels:

app: myapp

tier: frontend

spec:

containers:

- name: myapp

image: ikubernetes/myapp:v1

- name: busybox

image: busybox:latest

command:

- "/bin/sh"

- "-c"

- "sleep 3600"

 

kubectl create -f pod-demo.yaml

 

在一个pod中自定义两个容器同时running

kubectl delete pods pod-demo删除这个pod

或者kubectl delete -f pod-demo.yaml