运维开发网

Deployment

运维开发网 https://www.qedev.com 2020-01-27 14:10 出处:网络 作者:qq5bb2021f831d3
Deployment:kind:DeploymentapiVersion:extensions/v1beta1metadata:name:skxspec:replicas:3template:metadata:labels:app:skx_serverspec:containers:-name:httpd-testimage:192.168.1.10:5000/httpd:v1ports:-con

Deployment:

kind: Deployment

apiVersion: extensions/v1beta1

metadata:

name: skx

spec:

replicas: 3

template:

metadata:

labels:

app: skx_server

spec:

containers:

  • name: httpd-test

    image: 192.168.1.10:5000/httpd:v1

    ports:

    • containerPort: 80

PS:注意,在Deployment资源对象中,可以添加Port字段,但此字段仅供用户查看,并不实际生效。

如下:

ports:

  • containerPort: 80

SERVICE

kind: Service

apiVersion: v1

metadata:

name: skx-svc

spec:

selector:

app: skx_server

ports:

  • protocol: TCP

    port: 80

    targetPort: 80

关联主机:

kind: Service

apiVersion: v1

metadata:

name: skx-svc

spec:

type: NodePort

selector:

app: skx_server

ports:

  • protocol: TCP

    port: 80

    targetPort: 80

    nodePort: 30123

    更改pod访问界面:

    [root@master ~]# kubectl exec -it skx-694cc5db89-45nvk /bin/bash

    root@skx-694cc5db89-45nvk:/usr/local/apache2# echo no.1 > htdocs/index.html

    root@skx-694cc5db89-45nvk:/usr/local/apache2# exit

    查看规则:

    [root@master ~]# iptables-save

    SNAT:Source NAT(源地址转换) DNAT:Destnation(目标地址转换) MASQ:动态的源地址转换

    Service实现的负载均衡使用的时iptables规则。IPVS

    10.107.64.232

    KUBE-SVC-QDLMDMK46RWAY7QJ

查找对应的防火墙规则

[root@master ~]# kubectl get svc

Deployment

[root@master ~]# iptables-save | grep 10.107.64.232

Deployment

[root@master ~]# iptables-save | grep KUBE-SVC-QDLMDMK46RWAY7QJ

Deployment

[root@master ~]# iptables-save | grep KUBE-SEP-YPYQNHI3JGSZCBF5

Deployment

[root@master ~]# kubectl get pod -o wide

Deployment

ip一样

回滚到指定版本:

删除之前创建的资源:

[root@master ~]# kubectl delete -f skx-svc.yaml

service "skx-svc" deleted

[root@master ~]# kubectl delete -f skx.yaml

deployment.extensions "skx" deleted

[root@master ~]# kubectl get deployments.

No resources found.

[root@master ~]# vim skx.yaml

kind: Deployment

apiVersion: extensions/v1beta1

metadata:

name: skx

spec:

revisionHistoryLimit: 10 //添加

replicas: 3

template:

metadata:

labels:

app: skx_server

spec:

containers:

  • name: httpd-test

    image: 192.168.1.10:5000/httpd:v1

    ports:

    • containerPort: 80

      准备三个版本所使用的私有镜像,来模拟每次升级不同的镜像。

      [root@master ~]# mv skx.yaml skx1.yaml

      [root@master ~]# cp skx1.yaml skx2.yaml

      [root@master ~]# cp skx1.yaml skx3.yaml

[root@master ~]# vim skx1.yaml

15行:

    image: 192.168.1.10:5000/httpd:v1

[root@master ~]# vim skx2.yaml

15行:

    image: 192.168.1.10:5000/httpd:v2

[root@master ~]# vim skx3.yaml

15行:

    image: 192.168.1.10:5000/httpd:v3

此处3个yaml文件指定不同版本的镜像。

运行一个服务,并记录一个版本信息。

[root@master ~]# kubectl apply -f skx1.yaml --record

deployment.extensions/skx created

[root@master ~]# kubectl apply -f skx2.yaml --record

deployment.extensions/skx configured

[root@master ~]# kubectl apply -f skx3.yaml --record

deployment.extensions/skx configured

查看有哪些版本信息

[root@master ~]# kubectl rollout history deployment skx

deployment.extensions/skx

REVISION CHANGE-CAUSE

1 kubectl apply --filename=skx1.yaml --record=true

2 kubectl apply --filename=skx2.yaml --record=true

3 kubectl apply --filename=skx3.yaml --record=true

运行并升级Deployment资源,并记录版本信息。

[root@master ~]# kubectl apply -f skx2.yaml --record

deployment.extensions/skx configured

此时可以运行一个关联的Service自愿去验证,升级是否成功

[root@master ~]# kubectl apply -f skx-svc.yaml

service/skx-svc created

[root@master ~]# kubectl get svc

NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE

httpd-svc NodePort 10.97.81.154 <none> 80:31194/TCP 43h

kubernetes ClusterIP 10.96.0.1 <none> 443/TCP 5d17h

skx-svc NodePort 10.96.174.199 <none> 80:30123/TCP 16s

[root@master ~]# curl 10.96.174.199

<h1>songkaixiong | test-web | httpd | v3<h1>

回滚到指定版本。

[root@master ~]# kubectl rollout undo deployment skx --to-revision=1

deployment.extensions/skx rolled back

curl 10.96.174.199

<h1>songkaixiong | test-web | httpd | v1<h1>

用label控制Pod的位置

给node03打上一个标签

[root@master ~]# kubectl label nodes node03 disk=ssd

node/node03 labeled

指定查看node03标签:

[root@master ~]# kubectl get nodes --show-labels | grep node03

node03 Ready <none> 5d17h v1.15.0 beta.kubernetes.io/arch=amd64,beta.kubernetes.io/os=Linux,disk=ssd,kubernetes.io/arch=amd64,kubernetes.io/hostname=node03,kubernetes.io/os=Linux

不指定查看所有节点标签:

[root@master ~]# kubectl get nodes --show-labels

NAME STATUS ROLES AGE VERSION LABELS

master Ready master 5d17h v1.15.0 beta.kubernetes.io/arch=amd64,beta.kubernetes.io/os=Linux,kubernetes.io/arch=amd64,kubernetes.io/hostname=master,kubernetes.io/os=Linux,node-role.kubernetes.io/master=

node02 Ready <none> 5d17h v1.15.0 beta.kubernetes.io/arch=amd64,beta.kubernetes.io/os=Linux,kubernetes.io/arch=amd64,kubernetes.io/hostname=node02,kubernetes.io/os=Linux

node03 Ready <none> 5d17h v1.15.0 beta.kubernetes.io/arch=amd64,beta.kubernetes.io/os=Linux,disk=ssd,kubernetes.io/arch=amd64,kubernetes.io/hostname=node03,kubernetes.io/os=Linux

删除skx1资源:

[root@master ~]# kubectl delete -f skx1.yaml

deployment.extensions "skx" deleted

[root@master ~]# kubectl delete -f skx-svc.yaml

service "skx-svc" deleted

修改skx1.yaml配置文件:

[root@master ~]# vim skx1.yaml

kind: Deployment

apiVersion: extensions/v1beta1

metadata:

name: skx

spec:

revisionHistoryLimit: 10

replicas: 3

template:

metadata:

labels:

app: skx_server

spec:

containers:

  • name: httpd-test

    image: 192.168.1.10:5000/httpd:v1

    ports:

    • containerPort: 80

      nodeSelector: //添加节点选择器

      disk: ssd //和标签内容一致

      [root@master ~]# kubectl apply -f skx1.yaml

      deployment.extensions/skx created

      三台都在node03上运行:

      [root@master ~]# kubectl get pod -o wide

      NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES

      skx-55c4dc6dbc-7ztl9 1/1 Running 0 73s 10.244.2.27 node03 <none> <none>

      skx-55c4dc6dbc-jsms7 1/1 Running 0 73s 10.244.2.28 node03 <none> <none>

      skx-55c4dc6dbc-rfss7 1/1 Running 0 73s 10.244.2.26 node03 <none> <none>

删除标签:

查看node03的标签:

[root@master ~]# kubectl get nodes --show-labels node03

NAME STATUS ROLES AGE VERSION LABELS

node03 Ready <none> 5d17h v1.15.0 beta.kubernetes.io/arch=amd64,beta.kubernetes.io/os=Linux,disk=ssd,kubernetes.io/arch=amd64,kubernetes.io/hostname=node03,kubernetes.io/os=Linux

删除node03标签

[root@master ~]# kubectl label nodes node03 disk-

node/node03 labeled

再次查看node03标签:

[root@master ~]# kubectl get nodes --show-labels node03

NAME STATUS ROLES AGE VERSION LABELS

node03 Ready <none> 5d17h v1.15.0 beta.kubernetes.io/arch=amd64,beta.kubernetes.io/os=Linux,kubernetes.io/arch=amd64,kubernetes.io/hostname=node03,kubernetes.io/os=Linux

删除资源:

[root@master ~]# kubectl delete deployments. skx

deployment.extensions "skx" deleted

重新生成:

[root@master ~]# kubectl apply -f skx1.yaml

deployment.extensions/skx unchanged

会找不到,起不来:

[root@master ~]# kubectl get pod -o wide

NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES

skx-55c4dc6dbc-8rpl6 0/1 Pending 0 11s <none> <none> <none> <none>

skx-55c4dc6dbc-c2blp 0/1 Pending 0 11s <none> <none> <none> <none>

skx-55c4dc6dbc-zk7gw 0/1 Pending 0 11s <none> <none> <none> <none>

[root@master ~]# kubectl get pod -n kube-system

NAME READY STATUS RESTARTS AGE

coredns-5c98db65d4-52cdm 1/1 Running 3 5d17h

coredns-5c98db65d4-sl96w 1/1 Running 4 5d17h

etcd-master 1/1 Running 3 5d17h

kube-apiserver-master 1/1 Running 3 5d17h

kube-controller-manager-master 1/1 Running 3 5d17h

kube-flannel-ds-amd64-9vnsc 1/1 Running 4 5d17h

kube-flannel-ds-amd64-tdzrm 1/1 Running 2 5d17h

kube-flannel-ds-amd64-tvl2q 1/1 Running 5 5d17h

kube-proxy-492jr 1/1 Running 2 5d17h

kube-proxy-gccnb 1/1 Running 3 5d17h

kube-proxy-klznh 1/1 Running 2 5d17h

kube-scheduler-master 1/1 Running 4 5d17h

查看master日志:

[root@master ~]# kubectl logs -n kube-system kube-scheduler-master

查看详细描述信息

[root@master ~]# kubectl describe pod skx-55c4dc6dbc-8rpl6

查看日志

[root@master ~]# kubectl logs -n kube-system kube-scheduler-master

查看kubectl日志

[root@master ~]# less /var/log/messages | grep kubelet

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