第九章 Kubernetes进阶之将公司项目部署至k8s中

第九章 Kubernetes进阶之将公司项目部署至k8s中

 

  Kubernetes集群搭建完毕以后可以将公司项目部署至其中

  1.准备工作与注意事项

  部署项目情况

  1,业务架构及服务(dubbo,spring cloud)

  2,第三方服务,例如mysql,redis,zookeeper,eruka,mq

  3,服务之间怎么通信?

  4,资源消耗:硬件资源,带宽。

  部署项目时用到的k8s资源

  1,使用namespace进行不同项目隔离,或者不同环境(test,prod,dev)

  2,无状态应用(deployment)

  3,有状态应用(statefulset,pv,pvc)

  4,暴露外部访问(Service,ingress)

  5,secert,configmap

  2.准备基础镜像并推送至镜像仓库

  3.部署PHP/Java项目

  1,项目构建(java) CI/CD环境这个阶段自动完成(代码拉取->代码编译构建->镜像打包->推送到镜像仓库)

  2,编写yaml文件,使用镜像

  kubectl->yaml->镜像仓库拉取镜像->service(集群内部访问)/Ingress暴露给外网用户

  准备环境,在192.168.1.61上配置NFS服务器共享目录是/ifs/kubernetes

  配置PV动态供给

  下载nfs支持的yaml文件 下载地址https://github.com/kubernetes-incubator/external-storage/tree/master/nfs-client/deploy

  下载以下三个yaml文件

 

   

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# cat rbac.yaml 
apiVersion: v1
kind: ServiceAccount
metadata:
  name: nfs-client-provisioner
  # replace with namespace where provisioner is deployed
  namespace: default
---
kind: ClusterRole
apiVersion: rbac.authorization.k8s.io/v1
metadata:
  name: nfs-client-provisioner-runner
rules:
  - apiGroups: [""]
    resources: ["persistentvolumes"]
    verbs: ["get""list""watch""create""delete"]
  - apiGroups: [""]
    resources: ["persistentvolumeclaims"]
    verbs: ["get""list""watch""update"]
  - apiGroups: ["storage.k8s.io"]
    resources: ["storageclasses"]
    verbs: ["get""list""watch"]
  - apiGroups: [""]
    resources: ["events"]
    verbs: ["create""update""patch"]
---
kind: ClusterRoleBinding
apiVersion: rbac.authorization.k8s.io/v1
metadata:
  name: run-nfs-client-provisioner
subjects:
  - kind: ServiceAccount
    name: nfs-client-provisioner
    # replace with namespace where provisioner is deployed
    namespace: default
roleRef:
  kind: ClusterRole
  name: nfs-client-provisioner-runner
  apiGroup: rbac.authorization.k8s.io
---
kind: Role
apiVersion: rbac.authorization.k8s.io/v1
metadata:
  name: leader-locking-nfs-client-provisioner
  # replace with namespace where provisioner is deployed
  namespace: default
rules:
  - apiGroups: [""]
    resources: ["endpoints"]
    verbs: ["get""list""watch""create""update""patch"]
---
kind: RoleBinding
apiVersion: rbac.authorization.k8s.io/v1
metadata:
  name: leader-locking-nfs-client-provisioner
  # replace with namespace where provisioner is deployed
  namespace: default
subjects:
  - kind: ServiceAccount
    name: nfs-client-provisioner
    # replace with namespace where provisioner is deployed
    namespace: default
roleRef:
  kind: Role
  name: leader-locking-nfs-client-provisioner
  apiGroup: rbac.authorization.k8s.io

 

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# cat class.yaml 
apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
  #应用使用哪一个class创建PV
  name: managed-nfs-storage
provisioner: fuseim.pri/ifs # or choose another name, must match deployment's env PROVISIONER_NAME'
parameters:
  archiveOnDelete: "false"

   deployment.yaml需要修改制定的NFS服务器地址

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# cat deployment.yaml 
apiVersion: apps/v1
kind: Deployment
metadata:
  name: nfs-client-provisioner
  labels:
    app: nfs-client-provisioner
  # replace with namespace where provisioner is deployed
  namespace: default
spec:
  replicas: 1
  strategy:
    type: Recreate
  selector:
    matchLabels:
      app: nfs-client-provisioner
  template:
    metadata:
      labels:
        app: nfs-client-provisioner
    spec:
      serviceAccountName: nfs-client-provisioner
      containers:
        - name: nfs-client-provisioner
          image: quay.io/external_storage/nfs-client-provisioner:latest
          volumeMounts:
            - name: nfs-client-root
              mountPath: /persistentvolumes
          env:
            - name: PROVISIONER_NAME
              value: fuseim.pri/ifs
            - name: NFS_SERVER
              value: 192.168.1.61
            - name: NFS_PATH
              value: /ifs/kubernetes
      volumes:
        - name: nfs-client-root
          nfs:
            server: 192.168.1.61
            path: /ifs/kubernetes

   应用

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kubectl apply -f rbac.yaml 
kubectl apply -f class.yaml 
kubectl apply -f deployment.yaml 

   部署Harbor镜像仓库部署地址为192.168.1.61

  克隆延时代码

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git clone https://github.com/lizhenliang/tomcat-java-demo.git

   准备mvn和java环境用于构建war包

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yum -y install maven java-1.8.0-openjdk.x86_64

   修改配置文件修改数据库地址和密码以后构建修改配置文件

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src/main/resources/application.yml

   

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mvn clean install -Dmaven.test.skip=true

   部署tomcat是无状态,通过service即ingrss暴露

  deployment

  service

  ingress

  部署MySQL是有状态部署,需要使用PV进行数据存储以及实现自动供给

  statefulset

  headless service

   pv,pvc(storageclass)

  构建好以后创建镜像

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cd tomcat-java-demo
#构建镜像包
docker build -t 192.168.1.61/project/java-demo .
#推送至镜像仓库
docker push 192.168.1.61/project/java-demo

   推送镜像仓库前需要登录docker login 192.168.1.61默认用户名密码是admin Harbor12345

  以及配置好Harbor信任

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# cat /etc/docker/daemon.json 
{
          "registry-mirrors": ["https://7sl94zzz.mirror.aliyuncs.com"],
          "insecure-registries": ["192.168.1.61"]
}

   新建jave-demo文件夹用于本次部署

  创建一个test命名空间

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# cat namespace.yaml 
apiVersion: v1
kind: Namespace
metadata:
  name: test

   

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kubectl apply -f namespace.yaml

 

  查看已经创建了test的命名空间

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# kubectl get ns
NAME            STATUS   AGE
default         Active   41h
ingress-nginx   Active   16h
kube-public     Active   41h
kube-system     Active   41h
test            Active   43s

   创建create放置在命名空间test下 email随便指定一个即可registry-pull-secret为指定secret名称需要配置在拉取镜像的deployment中

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kubectl create secret docker-registry registry-pull-secret --docker-username=admin --docker-password=Harbor12345 --docker-email=admin@123.com -n test

   PS:使用以上方式创建的secret无法拉取镜像需要使用以下方式创建

  自定义命名空间为test 需要先创建命名空间test否则无法应用会报错

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# cat registry-pull-secret.yaml 
apiVersion: v1
kind: Secret
metadata:
  name: registry-pull-secret
  namespace: test
data:
  .dockerconfigjson: ewoJImF1dGhzIjogewoJCSIxOTIuMTY4LjEuNjEiOiB7CgkJCSJhdXRoIjogIllXUnRhVzQ2U0dGeVltOXlNVEl6TkRVPSIKCQl9Cgl9LAoJIkh0dHBIZWFkZXJzIjogewoJCSJVc2VyLUFnZW50IjogIkRvY2tlci1DbGllbnQvMTkuMDMuNiAobGludXgpIgoJfQp9
type: kubernetes.io/dockerconfigjson
 
# kubectl apply -f registry-pull-secret.yaml 

   配置文件的秘钥在已经登录Harbor的主机使用以下命令获取

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cat /root/.docker/config.json | base64 -w0

 

  查看

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# kubectl get secret -n test
NAME                   TYPE                                  DATA   AGE
default-token-5mnvg    kubernetes.io/service-account-token   3      11m
registry-pull-secret   kubernetes.io/dockerconfigjson        1      50s

   创建deployment

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# cat deployment.yaml 
apiVersion: apps/v1
kind: Deployment
metadata:
  name: tomcat-java-demo
  namespace: test
spec:
  replicas: 3
  selector:
    matchLabels:
      project: www
      run: java-demo
  template:
    metadata:
      labels:
        project: www
        run: java-demo
    spec:
      imagePullSecrets:
      - name: registry-pull-secret
      containers:
      - name: tomcat
        image: 192.168.1.61/project/java-demo
        imagePullPolicy: Always
        resources:
          requests:
            cpu: 0.5
            memory: 1Gi
          limits:
            cpu: 1
            memory: 2Gi
        livenessProbe:
          httpGet:
            path: /
            port: 8080
          initialDelaySeconds: 60
          timeoutSeconds: 20
        readinessProbe:
          httpGet:
            path: /
            port: 8080
          initialDelaySeconds: 60
          timeoutSeconds: 20

   创建

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kubectl apply -f deployment.yaml

   查看 命名空间是test

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# kubectl get pod -n test
NAME                                READY   STATUS    RESTARTS   AGE
tomcat-java-demo-66466d7bc7-27q4v   1/1     Running   0          23m
tomcat-java-demo-66466d7bc7-hjdgt   1/1     Running   0          23m
tomcat-java-demo-66466d7bc7-x8zm9   1/1     Running   0          23m

   使用service发布刚刚运行的应用

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# cat service.yaml 
apiVersion: v1
kind: Service
metadata:
  creationTimestamp: null
  name: tomcat-java-demo
  namespace: test
spec:
  ports:
  - port: 80
    protocol: TCP
    targetPort: 8080
  selector:
    project: www
    run: java-demo
  type: NodePort
status:
  loadBalancer: {}

   PS:注意service的命名空间也需要设置为test否则创建的service无法访问后端的tomcat

   应用

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kubectl apply -f service.yaml 

   查看

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# kubectl get svc -n test
NAME               TYPE       CLUSTER-IP   EXTERNAL-IP   PORT(S)        AGE
tomcat-java-demo   NodePort   10.0.0.44    <none>        80:40995/TCP   4m52s

   没有部署ingress之前可以使用node ip加随机的nodeport端口进行访问

  部署ingress 部署ingress之前需要确保已经部署好ingress控制器 查看是否已经部署控制器使用命令

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kubectl get pod -n ingress-nginx

 

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# cat ingress.yaml 
apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  name: simple-fanout-example
  namespace: test
  annotations:
    nginx.ingress.kubernetes.io/rewrite-target: /
spec:
  rules:
  #定义访问域名
  - host: java.ctnrs.com
    http:
      paths:
      - path: /
        backend:
          #转发到哪个server下
          serviceName: tomcat-java-demo
          servicePort: 80

   应用

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kubectl apply -f ingress.yaml 

   查看

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# kubectl get ingress -n test
NAME                    HOSTS            ADDRESS   PORTS   AGE
simple-fanout-example   java.ctnrs.com             80      7s

   设置hosts可以通过域名访问http://java.ctnrs.com/

  但是没有配置MySQL只能看见页面无法实现功能

  部署mysql

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# cat mysql.yaml 
apiVersion: v1
kind: Service
metadata:
  name: mysql
  labels:
    project: java-demo
    run: mysql
spec:
  ports:
  - port: 3306
    name: mysql
  #不需要clusterIP
  clusterIP: None
  selector:
    project: java-demo
    run: mysql
 
---
apiVersion: apps/v1
kind: StatefulSet
metadata:
  name: db
spec:
  selector:
    matchLabels:
      project: java-demo
      run: mysql
  serviceName: "mysql"
  template:
    metadata:
      labels:
        project: java-demo
        run: mysql
    spec:
      containers:
      - name: mysql
        image: mysql:5.7
        ports:
        - containerPort: 3306
        env:
        - name: MYSQL_ROOT_PASSWORD
          value: "123456"
        volumeMounts:
        - mountPath: /var/lib/mysql
          name: data
  volumeClaimTemplates:
  - metadata:
      name: data
    spec:
      accessModes: ["ReadWriteOnce"]
      storageClassName: "managed-nfs-storage"
      resources:
        requests:
          storage: 2Gi

   应用

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kubectl apply -f mysql.yaml

   查看

 

   在对应的nfs服务器会创建一个文件夹用于持久保存MySQL数据

 

 

  查看pv和pvc

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kubectl get pv,pvc

    MySQL的连接地址是db-0.mysql.default 可以创建一个busybox测试

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kubectl run -it --rm --image=busybox bash

 

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# ping db-0.mysql.default
PING db-0.mysql.default (172.17.9.3): 56 data bytes
64 bytes from 172.17.9.3: seq=0 ttl=64 time=0.084 ms
64 bytes from 172.17.9.3: seq=1 ttl=64 time=0.076 ms

   修改项目的数据库配置

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cd tomcat-java-demo
vim src/main/resources/application.yml

 

 

   重新打包

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mvn clean install -Dmaven.test.skip=true

   重新打包docker镜像

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docker build -t 192.168.1.61/project/java-demo:1.0 .

   推送至Harbor镜像仓库

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docker push 192.168.1.61/project/java-demo:1.0

   登录私有镜像仓库查看已经有了1.0版本

 

   修改deployment.yaml修改一下版本号

 

   滚动更新

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kubectl apply -f deployment.yaml

 

 

   滚动更新是先现在新的镜像包启动以后再删除原有包

  拷贝数据库脚本至容器

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kubectl cp tables_ly_tomcat.sql db-0:/

   登录容器导入数据库表

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#登录容器
kubectl exec -it db-0 bash
#登录数据库
mysql -uroot -p123456
#导入表
mysql> source tables_ly_tomcat.sql;

   因为连接了数据库所以登录web页面java.ctnrs.com即可实现该程序的简单功能添加信息

   

  部署PHP项目  

  本次部署WordPress  

  下载示例代码

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git clone https://github.com/lizhenliang/php-demo

   修改数据库配置

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#cd php-demo
vim wp-config.php

 

 

   查看Dockerfile文件

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# cat Dockerfile 
FROM lizhenliang/nginx-php:latest
MAINTAINER www.ctnrs.com
ADD . /usr/local/nginx/html

   构建提交到私有仓库

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docker build -t 192.168.1.61/project/php-demo:1.0 .
docker push 192.168.1.61/project/php-demo:1.0

   删除刚刚部署java的namespace为test的命名空间

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kubectl delete -f namespace.yaml

   删除刚刚部署的数据库MySQL

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kubectl delete -f mysql.yaml

   查看是否已经删除干净

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#命名空间test的pod svc ingress都没有了
# kubectl get pod,svc,ingress -n test
No resources found.
#数据库db-0的坡道也没有了,保留了nfs
# kubectl get pod
NAME                                      READY   STATUS    RESTARTS   AGE
nfs-client-provisioner-7665588bd7-66q7w   1/1     Running   0          69m

   创建namespace名字为test

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# cat namespace.yaml 
apiVersion: v1
kind: Namespace
metadata:
  name: test
 
#kubectl apply -f namespace.yaml

   查看

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# kubectl get ns
NAME            STATUS   AGE
default         Active   2d17h
ingress-nginx   Active   41h
kube-public     Active   2d17h
kube-system     Active   2d17h
test            Active   17s

   创建Harbor加密认证

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# cat registry-pull-secret.yaml
apiVersion: v1
kind: Secret
metadata:
  name: registry-pull-secret
  namespace: test
data:
  .dockerconfigjson: ewoJImF1dGhzIjogewoJCSIxOTIuMTY4LjEuNjEiOiB7CgkJCSJhdXRoIjogIllXUnRhVzQ2U0dGeVltOXlNVEl6TkRVPSIKCQl9Cgl9LAoJIkh0dHBIZWFkZXJzIjogewoJCSJVc2VyLUFnZW50IjogIkRvY2tlci1DbGllbnQvMTkuMDMuNiAobGludXgpIgoJfQp9
type: kubernetes.io/dockerconfigjson
  
# kubectl apply -f registry-pull-secret.yaml 

   查看

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# kubectl get secret -n test
NAME                   TYPE                                  DATA   AGE
default-token-kklxx    kubernetes.io/service-account-token   3      86s
registry-pull-secret   kubernetes.io/dockerconfigjson        1      9s

   创建php deployment

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# cat deployment.yaml 
apiVersion: apps/v1
kind: Deployment
metadata:
  name: php-demo
  namespace: test
spec:
  replicas: 3
  selector:
    matchLabels:
      project: www
      run: php-demo
  template:
    metadata:
      labels:
        project: www
        run: php-demo
    spec:
      imagePullSecrets:
      - name: registry-pull-secret
      containers:
      - name: php
        image: 192.168.1.61/project/php-demo:1.0
        imagePullPolicy: Always
        resources:
          requests:
            cpu: 0.5
            memory: 1Gi
          limits:
            cpu: 1
            memory: 2Gi
        livenessProbe:
          httpGet:
            path: /
            port: 80
          initialDelaySeconds: 60
          timeoutSeconds: 20
        readinessProbe:
          httpGet:
            path: /
            port: 80
          initialDelaySeconds: 60
          timeoutSeconds: 20
 
# kubectl apply -f deployment.yaml

   查看

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# kubectl get pod -n test
NAME                        READY   STATUS    RESTARTS   AGE
php-demo-5c4b869ffd-2cwzr   0/1     Running   0          15s
php-demo-5c4b869ffd-7wt48   0/1     Running   0          15s
php-demo-5c4b869ffd-gsm4t   0/1     Running   0          15s

   创建service对应刚刚创建的deployment

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# cat service.yaml 
apiVersion: v1
kind: Service
metadata:
  creationTimestamp: null
  name: php-demo
  namespace: test
spec:
  ports:
  - port: 80
    protocol: TCP
    targetPort: 80
  selector:
    project: www
    run: php-demo
  type: NodePort
status:
  loadBalancer: {}
 
# kubectl apply -f service.yaml 
service/php-demo created

   查看

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# kubectl get svc -n test
NAME       TYPE       CLUSTER-IP   EXTERNAL-IP   PORT(S)        AGE
php-demo   NodePort   10.0.0.14    <none>        80:49142/TCP   14s

   创建ingress 创建ingress之前确保已经部署了ingress-nginx

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# kubectl get pod -n ingress-nginx
NAME                             READY   STATUS    RESTARTS   AGE
nginx-ingress-controller-42gsg   1/1     Running   2          41h
nginx-ingress-controller-5r29z   1/1     Running   2          41h

 

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# cat ingress.yaml 
apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  name: simple-fanout-example
  namespace: test
  annotations:
    nginx.ingress.kubernetes.io/rewrite-target: /
spec:
  rules:
  #定义访问域名
  - host: php.ctnrs.com
    http:
      paths:
      - path: /
        backend:
          #转发到哪个server下
          serviceName: php-demo
          servicePort: 80
 
# kubectl apply -f ingress.yaml 
ingress.extensions/simple-fanout-example created

   查看

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# kubectl get ingress -n test
NAME                    HOSTS           ADDRESS   PORTS   AGE
simple-fanout-example   php.ctnrs.com             80      25s

   设置hosts以后即可使用域名php.ctnrs.com访问

posted @ 2021-01-13 15:30  CloudNativeBJ  阅读(213)  评论(0编辑  收藏  举报