创建带Tomcat服务的CentOS Docker镜像

素颜马尾好姑娘i 2022-07-13 13:44 175阅读 0赞

Tomacat服务器是一个免费的开入源代码的Web应用服务器，属于轻量级应用服务器，在中小型系统和并发访问用户不是很多的场合下普遍使用，是开发和高度JSP程序的首选。  
下面我就分步骤向大家介绍如何创建带Nginx服务的[CentOS][] Docker镜像。  
基础镜像：

[root@localhost ~]# docker images
    REPOSITORY          TAG                 IMAGE ID            CREATED             VIRTUAL SIZE
    sshd                dockerfile          411d5fb16366        2 days ago          278 MB
    centos              latest              0f73ae75014f        5 weeks ago         172.3 MB

其中镜像sshd:dockerfile是以镜像centos为基础的开放SSH服务的镜像。  
第一部分，手工配置并生成镜像  
一 、以镜像sshd-centos为基础新建容器，并指定容器的ssh端口22映射到宿主机的2222端口上.

docker run -d -p 2222:22 sshd:dockerfile /usr/sbin/sshd -D

查看容器运行情况：

[root@localhost ~]# docker ps -a
    CONTAINER ID        IMAGE               COMMAND               CREATED             STATUS              PORTS                  NAMES
    bdde7d657620        sshd:dockerfile     "/usr/sbin/sshd -D"   6 seconds ago       Up 5 seconds        0.0.0.0:2222->22/tcp   romantic_bardeen

二、在宿主机上通过ssh登录容器

ssh localhost -p 2222

如果提示没有ssh命令请安装openssh-clients

yum install -y openssh-clients

三、下载源码包及相关软件  
1、安装wget

cd /usr/local/src
    yum install -y wget

2、下载源码包  
下载JDK

wget --no-check-certificate -c --header "Cookie: Oraclelicense=accept-securebackup-cookie" http://download.oracle.com/otn-pub/java/jdk/8u60-
    b27/jdk-8u60-linux-x64.tar.gz

上面的地址要去官网的地址去获取，每超过30分钟就会失效：[http://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html][http_www.oracle.com_technetwork_java_javase_downloads_jdk8-downloads-2133151.html]

下载Tomcat

wget http://apache.fayea.com/tomcat/tomcat-8/v8.0.27/bin/apache-tomcat-8.0.27.tar.gz

四、安装JDK

1、解压源码包

tar -zxvf jdk-8u60-linux-x64.tar.gz
    mv jdk1.8.0_60 /usr/local/jdk1.8.0_60

2、配置JDK环境脚本

touch  /etc/profile.d/java.sh
    echo "JAVA_HOME=/usr/local/jdk1.8.0_60" >> /etc/profile.d/java.sh
    echo "JAVA_BIN=/usr/local/jdk1.8.0_60/bin" >> /etc/profile.d/java.sh
    echo "JRE_HOME=/usr/local/jdk1.8.0_60/jre" >> /etc/profile.d/java.sh
    echo "PATH=$PATH:/usr/local/jdk1.8.0_60/bin:/usr/local/jdk1.8.0_60/jre/bin" >> /etc/profile.d/java.sh
    echo "CLASSPATH=/usr/local/jdk1.8.0_60/jre/lib:/usr/local/jdk1.8.0_60/lib:/usr/local/jdk1.8.0_60/jre/lib/charsets.jar" >> /etc/profile.d/java.sh

3、导入环境脚本

. /etc/profile.d/java.sh

4、查看是否安装成功

java  -version

如果安装成功就会显示java版本信息

五、安装tomcat  
1、解压源码包

tar -zxvf apache-tomcat-8.0.27.tar.gz
    mv apache-tomcat-8.0.27 /usr/local/tomcat

2、修改配置文件

cd /usr/local/tomcat/bin
    cp catalina.sh catalina.sh.bak
    >catalina.sh
    echo '#!/bin/sh'>>catalina.sh
    echo "JAVA_HOME=/usr/local/jdk1.8.0_60">>catalina.sh
    echo "CATALINA_HOME=/usr/local/tomcat" >> catalina.sh
    grep -v '^#!/bin/sh' catalina.sh.bak >> catalina.sh

3、启动tomcat服务

/usr/local/tomcat/bin/catalina.sh start

查看进程

[root@bdde7d657620 bin]# ps aux
    USER       PID %CPU %MEM    VSZ   RSS TTY      STAT START   TIME COMMAND
    root         1  0.0  0.3  82456  3436 ?        Ss   07:00   0:00 /usr/sbin/sshd -D
    root        85  0.0  0.4  89792  4520 ?        Ss   07:35   0:00 sshd: root@pts/0
    root        87  0.0  0.1  13264  1976 pts/0    Ss   07:35   0:00 -bash
    root       316 93.3  7.4 2165884 75864 pts/0   Sl   08:31   0:02 /usr/local/jdk1.8.0_60/bin/java -Djava.util
    root       332  0.0  0.1  21284  1268 pts/0    R+   08:31   0:00 ps aux

六、新建启动脚本

vi /usr/local/sbin/run.sh

脚本内容：

#!/bin/bash
    /usr/sbin/sshd -D &
    /usr/local/tomcat/bin/catalina.sh run

七、生成镜像  
1、退出容器，运行下面的命令查看窗口信息

[root@localhost ~]# docker ps -a
    CONTAINER ID        IMAGE               COMMAND               CREATED             STATUS              PORTS                  NAMES
    bdde7d657620        sshd:dockerfile     "/usr/sbin/sshd -D"   About an hour ago   Up About an hour    0.0.0.0:2222->22/tcp   romantic_bardeen

2、生成镜像

[root@localhost ~]# docker commit bdde7d657620 tomcat:centos
    d2f8ec74f011e5bcd0b544b251cc120a31e53411f6ab2904c103c5f3a759096d

3、查看镜像

[root@localhost ~]# docker images
    REPOSITORY          TAG                 IMAGE ID            CREATED             VIRTUAL SIZE
    tomcat              centos              d2f8ec74f011        44 seconds ago      862.9 MB
    sshd                dockerfile          411d5fb16366        2 days ago          278 MB
    centos              latest              0f73ae75014f        5 weeks ago         172.3 MB

4、根据新生成的镜像生成容器

[root@localhost ~]# docker run -d -p 2223:22 -p 8081:8080 tomcat:centos /usr/local/sbin/run.sh
    5fd0af983d91e621b3b450cfdcc5c35d6ef8d8b1819220395ba44b63c28f1277

分别映射容器的22、8080端口给宿主机的2223、8081端口，并运行启动脚本。  
查看新生成的容器：

[root@localhost ~]# docker ps -a
    CONTAINER ID        IMAGE               COMMAND                CREATED             STATUS              PORTS                                          NAMES
    5fd0af983d91        tomcat:centos       "/usr/local/sbin/run 9 seconds ago Up 7 seconds 0.0.0.0:2223->22/tcp, 0.0.0.0:8081->8080/tcp determined_leakey bdde7d657620 sshd:dockerfile "/usr/sbin/sshd -D" About an hour ago Up About an hour 0.0.0.0:2222->22/tcp romantic_bardeen

5、测试

[root@localhost ~]# curl localhost:8081
    <!DOCTYPE html>
    <html lang="en">
        <head>
            <meta charset="UTF-8" />
            <title>Apache Tomcat/8.0.27</title>
            <link href="favicon.ico" rel="icon" type="image/x-icon" />
            <link href="favicon.ico" rel="shortcut icon" type="image/x-icon" />
            <link href="tomcat.css" rel="stylesheet" type="text/css" />
        </head>
    .........
    省略中间内容
    .........
                    <div class="col20">
                        <div class="container">
                            <h4>Apache Software Foundation</h4>
                            <ul>
                                <li><a href="http://tomcat.apache.org/whoweare.html">Who We Are</a></li>
                                <li><a href="http://tomcat.apache.org/heritage.html">Heritage</a></li>
                                <li><a href="http://www.apache.org">Apache Home</a></li>
                                <li><a href="http://tomcat.apache.org/resources.html">Resources</a></li>
                            </ul>
                        </div>
                    </div>
                    <br class="separator" />
                </div>
                <p class="copyright">Copyright ©1999-2015 Apache Software Foundation.  All Rights Reserved</p>
            </div>
        </body>
    
    </html>

测试成功！

第二部分，通过Dockerfile自动生成镜像  
由于Dockerfile生成镜像的步骤大多类似，这里直接介绍使用的Dockerfile和需要的脚本文件。

1、新建目录及文件

mkdir /root/tomcat_centos
    cd /root/tomcat_centos
    touch Dockerfile run.sh

下载JDK  
JDK的下载方法与手工配置相同。然后解压并移动到/root/tomcat\_centos目录下

tar -zxvf jdk-8u60-linux-x64.tar.gz

目录结构如下

tomcat_centos/
    ├── Dockerfile
    ├── jdk1.8.0_60
    └── run.sh

2，run.sh脚本内容：

#!/bin/bash
    /usr/sbin/sshd -D &
    /usr/local/tomcat/bin/catalina.sh run

3、Dockerfile内容

#新生成的镜像是基于sshd-centos镜像
    FROM sshd-centos
    MAINTAINER by cmsteven
    WORKDIR /usr/local/src
    #安装wget
    RUN yum install -y wget
    #下载tomcat源码包
    RUN wget http://apache.fayea.com/tomcat/tomcat-8/v8.0.27/bin/apache-tomcat-8.0.27.tar.gz
    #从宿主机上复制JDK文件夹
    ADD jdk1.8.0_60 /usr/local/jdk1.8.0_60
    #配置JDK环境脚本
    RUN touch  /etc/profile.d/java.sh
    RUN echo "JAVA_HOME=/usr/local/jdk1.8.0_60" >> /etc/profile.d/java.sh
    RUN echo "JAVA_BIN=/usr/local/jdk1.8.0_60/bin" >> /etc/profile.d/java.sh
    RUN echo "JRE_HOME=/usr/local/jdk1.8.0_60/jre" >> /etc/profile.d/java.sh
    RUN echo "PATH=$PATH:/usr/local/jdk1.8.0_60/bin:/usr/local/jdk1.8.0_60/jre/bin" >> /etc/profile.d/java.sh
    RUN echo "CLASSPATH=/usr/local/jdk1.8.0_60/jre/lib:/usr/local/jdk1.8.0_60/lib:/usr/local/jdk1.8.0_60/jre/lib/charsets.jar" >> /etc/profile.d/java.sh
    #导入JDK环境
    RUN . /etc/profile.d/java.sh
    #解压tomcat源码包
    RUN tar -zxvf /usr/local/src/apache-tomcat-8.0.27.tar.gz
    RUN mv /usr/local/src/apache-tomcat-8.0.27 /usr/local/tomcat
    #修改tomcat启动脚本
    WORKDIR /usr/local/tomcat/bin
    RUN cp  /usr/local/tomcat/bin/catalina.sh  /usr/local/tomcat/bin/catalina.sh.bak
    RUN > /usr/local/tomcat/bin/catalina.sh
    RUN echo '#!/bin/sh'>> /usr/local/tomcat/bin/catalina.sh
    RUN echo "JAVA_HOME=/usr/local/jdk1.8.0_60">> /usr/local/tomcat/bin/catalina.sh
    RUN echo "CATALINA_HOME=/usr/local/tomcat" >>  /usr/local/tomcat/bin/catalina.sh
    RUN grep -v '^#!/bin/sh' catalina.sh.bak >>  /usr/local/tomcat/bin/catalina.sh
    #启动tomcat服务
    RUN  /usr/local/tomcat/bin/catalina.sh start
    #复制容器启动脚本
    ADD run.sh /usr/local/sbin/run.sh
    #设置脚本权限
    RUN chmod 755 /usr/local/sbin/run.sh
    CMD ["/usr/local/sbin/run.sh"]
    #开放容器的22和8080端口
    EXPOSE 8080
    EXPOSE 22

[CentOS]: http://www.linuxidc.com/topicnews.aspx?tid=14
[http_www.oracle.com_technetwork_java_javase_downloads_jdk8-downloads-2133151.html]: http://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html