标签
进入目录保存实验文件
并创建一个yaml使用多个标签
[root@master tz123]# cd /root/tz123/labfile/labelfile
[root@master labelfile]# vim labelpod.yaml
kind: Pod
apiVersion: v1
metadata:
name: labelpod
labels:
app: busybox
version: new
spec:
containers:
- name: labelpod
image: busybox
args:
- /bin/sh
- -c
- sleep 30000创建Pod，并查看pod的label
[root@master labelfile]# kubectl apply -f labelpod.yaml
pod/labelpod created
[root@master labelfile]# kubectl get pod --show-labels
NAME READY STATUS RESTARTS AGE LABELS
labelpod 1/1 Running 0 11s app=busybox,version=new为容器添加新标签
[root@master labelfile]# kubectl label pod labelpod time=2019
pod/labelpod labeled
[root@master labelfile]# kubectl get pod --show-labels
NAME READY STATUS RESTARTS AGE LABELS
labelpod 1/1 Running 0 69s app=busybox,time=2019,version=new标签选择器
创建新的yaml
[root@master labelfile]# vim labelpod2.yaml
kind: Pod
apiVersion: v1
metadata:
name: labelpod2
labels:
app: httpd
version: new
spec:
containers:
- name: httpd
image: httpd创建并查看新创建的labelpod2
[root@master labelfile]# kubectl apply -f labelpod2.yaml
[root@master labelfile]# kubectl get pod --show-labels
NAME READY STATUS RESTARTS AGE LABELS
labelpod 1/1 Running 0 12m app=busybox,time=2019,version=new
labelpod2 0/1 ContainerCreating 0 23s app=httpd,version=new使用给予等值的标签选择器
[root@master labelfile]# kubectl get pod -l app=httpd
NAME READY STATUS RESTARTS AGE
labelpod2 1/1 Running 0 100s
或
[root@master labelfile]# kubectl get pod -l app==httpd
NAME READY STATUS RESTARTS AGE
labelpod2 1/1 Running 0 114s使用基于不等值的标签选择器和查看pod针对某标签键的值
[root@master labelfile]# kubectl get pod -l app!=httpd
NAME READY STATUS RESTARTS AGE
labelpod 1/1 Running 0 14m
[root@master labelfile]# kubectl get pod -L app
NAME READY STATUS RESTARTS AGE APP
labelpod 1/1 Running 0 15m busybox
labelpod2 1/1 Running 0 3m5s httpd使用标签选择器实现调度
将节点1打上标签并查看
[root@master labelfile]# kubectl label node node env=test
node/node labeled
[root@master labelfile]# kubectl get node -L env
NAME STATUS ROLES AGE VERSION ENV
master Ready control-plane,master 91d v1.20.6
node Ready <none> 91d v1.20.6 test使用nodeselector实现调度，创建新的yaml文件
[root@master labelfile]# vim nsdeploy.yaml
kind: Deployment
apiVersion: apps/v1
metadata:
name: nginx-dy
labels:
app: nginx
spec:
replicas: 3
selector:
matchLabels:
app: nginx
template:
metadata:
labels:
app: nginx
spec:
containers:
- name: nginx
image: nginx:1.7.9
ports:
- containerPort: 80
nodeSelector:
env: test查看deployment中的pod位置
[root@master labelfile]# kubectl get pod -o wide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
labelpod 1/1 Running 0 28m 10.244.167.145 node <none> <none>
labelpod2 1/1 Running 0 15m 10.244.167.146 node <none> <none>
nginx-dy-6dd6c76bcb-667ss 1/1 Running 0 5m19s 10.244.167.148 node <none> <none>
nginx-dy-6dd6c76bcb-q8tqh 1/1 Running 0 5m19s 10.244.167.149 node <none> <none>
nginx-dy-6dd6c76bcb-xc9h7 1/1 Running 0 5m19s 10.244.167.147 node <none> <none>使用 node affinity 调度，创建一个新的 yaml 文件 nadeploy2.yaml
[root@master labelfile]# vim nadeploy2.yaml
kind: Deployment
apiVersion: apps/v1
metadata:
name: httpd-dy
labels:
app: httpd
spec:
replicas: 3
selector:
matchLabels:
app: httpd
template:
metadata:
labels:
app: httpd
spec:
containers:
- name: httpd
image: httpd
affinity:
nodeAffinity:
requiredDuringSchedulingIgnoredDuringExecution:
nodeSelectorTerms:
- matchExpressions:
- key: env
operator: In
values:
- test创建deployment并查看deployment中的pod位置，三个pod都在node上
[root@master labelfile]# kubectl apply -f nadeploy2.yaml
deployment.apps/httpd-dy created
[root@master labelfile]# kubectl get pod -o wide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
httpd-dy-5b4bb9646-g4jzb 1/1 Running 0 33s 10.244.167.150 node <none> <none>
httpd-dy-5b4bb9646-lb876 1/1 Running 0 33s 10.244.167.151 node <none> <none>
httpd-dy-5b4bb9646-q7zcm 0/1 ContainerCreating 0 33s <none> node <none> <none>
labelpod 1/1 Running 0 38m 10.244.167.145 node <none> <none>
labelpod2 1/1 Running 0 26m 10.244.167.146 node <none> <none>
nginx-dy-6dd6c76bcb-667ss 1/1 Running 0 15m 10.244.167.148 node <none> <none>
nginx-dy-6dd6c76bcb-q8tqh 1/1 Running 0 15m 10.244.167.149 node <none> <none>
nginx-dy-6dd6c76bcb-xc9h7 1/1 Running 0 15m 10.244.167.147 node <none> <none>实训任务
创建一个deployment
使用镜像nginx，5个副本
deployment中的pod不能出现在node上
[root@master labelfile]# vim shixun01.yaml
kind: Deployment
apiVersion: apps/v1
metadata:
name: nginx-dy
labels:
app: nginx
spec:
replicas: 1
selector:
matchLabels:
app: nginx
template:
metadata:
labels:
app: nginx
spec:
containers:
- name: nginx
image: nginx
affinity:
nodeAffinity:
requiredDuringSchedulingIgnoredDuringExecution:
nodeSelectorTerms:
- matchExpressions:
- key: env
operator: Not In
values:
- node寻找一种方式搜索出kubernetes系统上提供core-dns，kubeproxy以及dashboard服务的pod
先给core-dns，kubeproxy，dashboard打上标签
[root@master labelfile]# kubectl label -n kube-system pod kube-proxy-kj8j5 app=kubeproxy
[root@master labelfile]# kubectl label -n kube-system pod coredns-7f89b7bc75-n224r app=coredns查找关键词的pod
搜索dashboard的pod
使用标签和标签选择器，使用一条命令删除node2节点的nginx
