作者：雪庆华
原创作品，严禁转载！
1.资源清单的结构
apiVersion:资源的API版本号。固定的，但定义时必须声明。
kind:资源的类型。固定的，但定义时必须声明。
metadata:元数据资源，用于描述资源的信息。包括但不限于： name，labels，namespace，annotations。
spec:期望资源的运行状态。
status:资源的实际状态，由K8S组件自行维护。书写时可忽略
2.资源清单使用案例
2.1.创建工作目录
[root@master231 ~]# mkdir -pv /huazai/manifests/pods
[root@master231 ~]# cd /huazai/manifests/pods2.2.编写资源清单
[root@master231 pods]# cat 01-pods-xiuxian.yaml
# 声明资源的版本号
apiVersion: v1
# 声明资源的类型
kind: Pod
# 声明资源的元数据信息
metadata:# 声明资源的名称name: huazai-v1-xiuxian
# 定义资源的期望状态
spec:# 定义容器的相关配置containers:# 定义容器的名称- name: c1# 定义镜像的名称image: registry.cn-hangzhou.aliyuncs.com/huazai007-k8s/apps:v1
#这又有个坑，说明文档没有写必填镜像，但是如果不填就会报错2.3.创建资源 方式一
[root@master231 pods]# kubectl create -f 01-pods-xiuxian.yaml
pod/huazai-v1-xiuxian created
[root@master231 pods]#
[root@master231 pods]# kubectl create -f 01-pods-xiuxian.yaml # 非"幂等性"
Error from server (AlreadyExists): error when creating "01-pods-xiuxian.yaml": pods "huazai-v1-xiuxian" already exists方式二（推荐）
[root@master231 pods]# kubectl apply -f 01-pods-xiuxian.yaml
# "幂等性"，如果资源存在则尝试更新，如果不存在则创建。
pod/huazai-v1-xiuxian unchanged
[root@master231 pods]#
[root@master231 pods]# kubectl apply -f 01-pods-xiuxian.yaml
pod/huazai-v1-xiuxian unchanged2.4.查看资源1 查看Pod资源列表
[root@master231 pods]# kubectl get pods
NAME READY STATUS RESTARTS AGE
huazai-v1-xiuxian 1/1 Running 0 5m27s2 以长格式显示资源列表
[root@master231 pods]# kubectl get pods -o wide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
huazai-v1-xiuxian 1/1 Running 0 5m34s 10.100.2.5 worker233 <none> <none>相关资源说明:NAME资源的名称。READY:以"/"为分隔符，右侧的数字表示Pod有多少个容器。左侧的数字表示Pod内有多少个容器处于运行状态。STATUS:资源是否处于就绪状态，目前认为"Running"就表示资源处于正常运行状态。RESTARTS:Pod内容器的重启次数总和。AGE:表示该资源创建的时间统计。IP:表示Pod的IP地址。NODE:表示Pod调度到哪个worker node节点。2.5.删除资源
[root@master231 pods]# kubectl delete -f 01-pods-xiuxian.yaml
pod "huazai-v1-xiuxian" deleted[root@master231 pods]# kubectl get pods -o wide
No resources found in default namespace.3. 基于标签的增删改查
1.资源没有标签
[root@master231 pods]# cat 02-pods-xiuxian-labels.yaml
apiVersion: v1
kind: Pod
metadata:name: huazai-v1-xiuxian-labels# 给资源打标签，标签的key和value都可以自定义#labels:# school: huazai# class: v1
spec:containers:- name: c1image: registry.cn-hangzhou.aliyuncs.com/huazai007-k8s/apps:v1
[root@master231 pods]#
[root@master231 pods]# kubectl apply -f 02-pods-xiuxian-labels.yaml
pod/huazai-v1-xiuxian-labels created
[root@master231 pods]#
[root@master231 pods]# kubectl get pods --show-labels
NAME READY STATUS RESTARTS AGE LABELS
huazai-v1-xiuxian-labels 1/1 Running 0 12s <none>
[root@master231 pods]#2.编写资源清单
[root@master231 pods]# cat 02-pods-xiuxian-labels.yaml
apiVersion: v1
kind: Pod
metadata:name: huazai-v1-xiuxian-labels# 给资源打标签，标签的key和value都可以自定义labels:school: huazaiclass: v1
spec:containers:- name: c1image: registry.cn-hangzhou.aliyuncs.com/huazai007-k8s/apps:v1
[root@master231 pods]# 3.给资源打标签
[root@master231 pods]# kubectl apply -f 02-pods-xiuxian-labels.yaml
pod/huazai-v1-xiuxian-labels configured
[root@master231 pods]#
[root@master231 pods]# kubectl get pods --show-labels
NAME READY STATUS RESTARTS AGE LABELS
huazai-v1-xiuxian-labels 1/1 Running 0 73s class=v1,school=huazai
[root@master231 pods]# 4.基于标签匹配Pod，从而删除Pod
[root@master231 pods]# kubectl get pods --show-labels
NAME READY STATUS RESTARTS AGE LABELS
huazai-v1-xiuxian-labels 1/1 Running 0 4m13s class=v1,school=huazai
[root@master231 pods]#
[root@master231 pods]# kubectl delete pods -l class=v1
pod "huazai-v1-xiuxian-labels" deleted
[root@master231 pods]#
[root@master231 pods]# kubectl get pods --show-labels
No resources found in default namespace.
[root@master231 pods]# 5.基于名字删除
[root@master231 pods]# kubectl apply -f 02-pods-xiuxian-labels.yaml
pod/huazai-v1-xiuxian-labels created
[root@master231 pods]#
[root@master231 pods]# kubectl get pods --show-labels
NAME READY STATUS RESTARTS AGE LABELS
huazai-v1-xiuxian-labels 1/1 Running 0 5s class=v1,school=huazai
[root@master231 pods]#
[root@master231 pods]# cat 02-pods-xiuxian-labels.yaml
apiVersion: v1
kind: Pod
metadata:name: huazai-v1-xiuxian-labels# 给资源打标签，标签的key和value都可以自定义#labels:# school: huazai# class: v1
spec:containers:- name: c1image: registry.cn-hangzhou.aliyuncs.com/huazai007-k8s/apps:v1
[root@master231 pods]#
[root@master231 pods]# kubectl apply -f 02-pods-xiuxian-labels.yaml
pod/huazai-v1-xiuxian-labels configured
[root@master231 pods]#
[root@master231 pods]# kubectl get pods --show-labels
NAME READY STATUS RESTARTS AGE LABELS
huazai-v1-xiuxian-labels 1/1 Running 0 71s <none>
[root@master231 pods]# 6.基于资源的名称删除Pod
[root@master231 pods]# kubectl get pods --show-labels
NAME READY STATUS RESTARTS AGE LABELS
huazai-v1-xiuxian-labels 1/1 Running 0 2m31s <none>
[root@master231 pods]#
[root@master231 pods]# kubectl delete pod huazai-v1-xiuxian-labels
pod "huazai-v1-xiuxian-labels" deleted
[root@master231 pods]#
[root@master231 pods]# kubectl get pods --show-labels
No resources found in default namespace.
[root@master231 pods]# 4.响应式管理Pod资源
1.创建Pod资源
[root@master231 pods]# kubectl run xiuxian --image=registry.cn-hangzhou.aliyuncs.com/huazai007-k8s/apps:v1
pod/xiuxian created2.查看Pod资源
[root@master231 pods]# kubectl get pods -o wide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
xiuxian 1/1 Running 0 3s 10.100.2.8 worker233 <none> <none>
[root@master231 pods]#
[root@master231 pods]# curl 10.100.2.83.给资源打标签
[root@master231 pods]# kubectl get pods --show-labels
NAME READY STATUS RESTARTS AGE LABELS
xiuxian 1/1 Running 0 2m25s run=xiuxian
[root@master231 pods]#
[root@master231 pods]# kubectl label pod xiuxian class=v1 school=huazai
pod/xiuxian labeled
[root@master231 pods]#
[root@master231 pods]# kubectl get pods --show-labels
NAME READY STATUS RESTARTS AGE LABELS
xiuxian 1/1 Running 0 2m35s class=v1,run=xiuxian,school=huazai4.修改资源的标签
[root@master231 pods]# kubectl get pods --show-labels
NAME READY STATUS RESTARTS AGE LABELS
xiuxian 1/1 Running 0 3m16s class=v1,run=xiuxian,school=huazai
[root@master231 pods]#
[root@master231 pods]#
[root@master231 pods]# kubectl label pod xiuxian school=laonanhai --overwrite
pod/xiuxian labeled
[root@master231 pods]#
[root@master231 pods]# kubectl get pods --show-labels
NAME READY STATUS RESTARTS AGE LABELS
xiuxian 1/1 Running 0 4m43s class=v1,run=xiuxian,school=laonanhai
[root@master231 pods]# 5.删除Pod资源
[root@master231 pods]# kubectl get pods --show-labels
NAME READY STATUS RESTARTS AGE LABELS
xiuxian 1/1 Running 0 5m32s class=v1,run=xiuxian,school=laonanhai
xiuxian2 1/1 Running 0 2s run=xiuxian2
[root@master231 pods]#
[root@master231 pods]#
[root@master231 pods]# kubectl delete pod --all
pod "xiuxian" deleted
pod "xiuxian2" deleted
[root@master231 pods]#
[root@master231 pods]# kubectl get pods --show-labels
No resources found in default namespace.
[root@master231 pods]#
5.将多个资源合并为一个资源清单
[root@master231 pods]# cat 05-pods-all-in-one-file.yaml
apiVersion: v1
kind: Pod
metadata:name: xiuxian-v1labels:apps: v1
spec:hostNetwork: truenodeName: worker232containers:- image: registry.cn-hangzhou.aliyuncs.com/huazai007-k8s/apps:v1 name: xiuxian# 此处的"---"表示一个文件的结束
---apiVersion: v1
kind: Pod
metadata:name: xiuxian-v2labels:apps: v2
spec:hostNetwork: truenodeName: worker233containers:- image: registry.cn-hangzhou.aliyuncs.com/huazai007-k8s/apps:v2name: xiuxian
[root@master231 pods]#
[root@master231 pods]#
[root@master231 pods]# kubectl apply -f 05-pods-all-in-one-file.yaml
pod/xiuxian-v1 created
pod/xiuxian-v2 created
[root@master231 pods]#
[root@master231 pods]# kubectl get pods -o wide --show-labels
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES LABELS
xiuxian-v1 1/1 Running 0 6s 10.0.0.232 worker232 <none> <none> apps=v1
xiuxian-v2 1/1 Running 0 6s 10.0.0.233 worker233 <none> <none> apps=v2
[root@master231 pods]#
[root@master231 pods]# kubectl delete pods -l apps
pod "xiuxian-v1" deleted
pod "xiuxian-v2" deleted
[root@master231 pods]#
[root@master231 pods]# kubectl get pods -o wide --show-labels
No resources found in default namespace.
[root@master231 pods]#
