6-7 传统web服务迁移kubernetes

将原有的tomcat镜像打tag 推送到私有仓库

docker tag registry.cn-hangzhou.aliyuncs.com/liuyi01/tomcat:8.0.51-alpine harbor.pdabc.com/kubernetes/tomcat:8.0.51-alpine

 

进入mooc-k8s-demo/web-demo 进行编译

cd mooc-k8s-demo/web-demo

修改pom.xml

在plugin出添加jdk版本限制1.7

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <parent>
        <artifactId>mooc-k8s-demo</artifactId>
        <groupId>com.mooc</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>


    <groupId>com.mooc</groupId>
    <artifactId>web-demo</artifactId>
    <version>1.0-SNAPSHOT</version>
    <packaging>war</packaging>


    <dependencies>
        <dependency>
            <groupId>com.mooc</groupId>
            <artifactId>dubbo-demo-api</artifactId>
            <version>1.0-SNAPSHOT</version>
        </dependency>


        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc-portlet</artifactId>
        </dependency>
        <dependency>
            <groupId>commons-validator</groupId>
            <artifactId>commons-validator</artifactId>
            <exclusions>
                <exclusion>
                    <artifactId>commons-logging</artifactId>
                    <groupId>commons-logging</groupId>
                </exclusion>
            </exclusions>
        </dependency>


        <dependency>
            <groupId>org.apache.curator</groupId>
            <artifactId>curator-framework</artifactId>
            <exclusions>
                <exclusion>
                    <groupId>io.netty</groupId>
                    <artifactId>netty</artifactId>
                </exclusion>
                <exclusion>
                    <artifactId>log4j</artifactId>
                    <groupId>log4j</groupId>
                </exclusion>
                <exclusion>
                    <artifactId>log4j</artifactId>
                    <groupId>log4j</groupId>
                </exclusion>
            </exclusions>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
            <version>2.9.4</version>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-annotations</artifactId>
            <version>2.9.4</version>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-core</artifactId>
            <version>2.9.4</version>
        </dependency>
        <dependency>
            <groupId>javax</groupId>
            <artifactId>javaee-web-api</artifactId>
        </dependency>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>dubbo</artifactId>
        </dependency>


        <dependency>
            <groupId>org.mortbay.jetty</groupId>
            <artifactId>jetty</artifactId>
            <version>6.1.26</version>
            <exclusions>
                <exclusion>
                    <groupId>org.mortbay.jetty</groupId>
                    <artifactId>servlet-api</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
        <dependency>
            <groupId>org.mortbay.jetty</groupId>
            <artifactId>jetty-util</artifactId>
            <version>6.1.26</version>
        </dependency>


    </dependencies>


    <build>
        <defaultGoal>package</defaultGoal>
        <resources>
            <resource>
                <directory>src/main/java</directory>
                <includes>
                    <include>**/*.xml</include>
                    <include>**/*.properties</include>
                    <include>**/*.vm</include>
                </includes>
            </resource>
            <resource>
                <directory>src/main/resources</directory>
                <filtering>true</filtering>
            </resource>
        </resources>










        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <configuration>
                    <source>1.7</source>
                    <target>1.7</target>
                    <encoding>UTF-8</encoding>
                    <showWarnings>true</showWarnings>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.mortbay.jetty</groupId>
                <artifactId>jetty-maven-plugin</artifactId>
                <version>8.1.16.v20140903</version>
                <configuration>
                    <scanIntervalSeconds>10</scanIntervalSeconds>
                    <connectors>
                        <connector implementation="org.eclipse.jetty.server.nio.SelectChannelConnector">
                            <port>8080</port>
                            <host>0.0.0.0</host>
                        </connector>
                    </connectors>
                    <scanIntervalSeconds>0</scanIntervalSeconds>
                    <stopPort>8280</stopPort>
                    <stopKey>stop</stopKey>
                </configuration>
            </plugin>
        </plugins>
    </build>

编译

mvn package

 

 

查看war包目录列表

cd target

jar -tf web-demo-1.0-SNAPSHOT.war 

 

解压war包

mkdir ROOT

mv web-demo-1.0-SNAPSHOT.war ROOT/

cd ROOT/

jar -xvf web-demo-1.0-SNAPSHOT.war 

rm -rf web-demo-1.0-SNAPSHOT.war 

 

编写Dockerfile

创建启动脚本的文件夹并加入启动脚本

mkdir dockerfile

 

vi dockerfile/start.sh

#!/bin/bash

# 通过tail命令挂起容器

sh /usr/local/tomcat/bin/startup.sh

tail -f /usr/local/tomcat/logs/catalina.out

 

修改zookeeper地址

vim WEB-INF/classes/applicationContext-service-config.xml 

vi Dockfile

 

FROM harbor.pdabc.com/kubernetes/tomcat:8.0.51-alpine

COPY ROOT /usr/local/tomcat/webapps/ROOT

COPY dockerfiles/start.sh /usr/local/tomcat/bin/start.sh

ENTRYPOINT ["sh" , "/usr/local/tomcat/bin/start.sh"]

 

 

 

执行构建命令

docker build -t web:v3 .

 

运行容器测试

docker run -it web:v3

 

推送镜像

docker tag web:v3  harbor.pdabc.com/kubernetes/web:v3

docker push harbor.pdabc.com/kubernetes/web:v3

 

创建web.yaml

#deploy
apiVersion: apps/v1
kind: Deployment
metadata:
  name: web-demo
spec:
  selector:
    matchLabels:
      app: web-demo
  replicas: 1
  template:
    metadata:
      labels:
        app: web-demo
    spec:
      containers:
      - name: web-demo
        image: harbor.pdabc.com/kubernetes/web:v3
        ports:
        - containerPort: 8080
---
#service
apiVersion: v1
kind: Service
metadata:
  name: web-demo
spec:
  ports:
  - port: 80
    protocol: TCP
    targetPort: 8080
  selector:
    app: web-demo
  type: ClusterIP


---
#ingress
apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  name: web-demo
spec:
  rules:
  - host: web.pdabc.com
    http:
      paths:
      - path: /
        backend:
          serviceName: web-demo
          servicePort: 80

 

运行并查看

kubectl apply -f web.yaml 

kubectl get pods

 

 

修改本地host 并查看http://web.pdabc.com/hello?name=jiaminxu