06 自定义Dockerfile
自己尝试编写一个tomcat9的Dockerfile
FROM centos
MAINTAINER simon<cm.t@qq.com>
#把宿主机当前上下文的c.txt拷贝到容器/usr/local/目录下
COPY c.txt /usr/local/cincontainer.txt
#把java与Tomcat添加到容器中
ADD apache-tomcat-9.0.38.tar.gz /usr/local/
ADD jdk-8u261-linux-x64.tar.gz /usr/local/
#安装wget工具
RUN yum install -y wget
#设置工作访问时候的workdir路径，登陆落脚点
ENV MYPATH /usr/local
WORKDIR $MYPATH
#配置java与tomcat环境变量
ENV JAVA_HOME /usr/local/jdk1.8.0_261
ENV CLASSPATH $JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar
ENV CATALINA_HOME /usr/local/apache-tomcat-9.0.38
ENV CATALINA_BASE /usr/local/apache-tomcat-9.0.38
ENV PATH $PATH:$JAVA_HOME/bin:$CATALINA_HOME/lib:$CATALINA_HOME/bin
#容器运行时监听的端口
EXPOSE 8080
#启动tomcat
# ENTRYPOINT ["/usr/local/apache-tomcat-9.0.38/bin/startup.sh"]
# CMD ["/usr/local/apache-tomcat-9.0.38/bin/catalina.sh","run"]
CMD /usr/local/apache-tomcat-9.0.38/bin/startup.sh && tail -F /usr/local/apache-tomcat-9.0.38/bin/logs/catalina.out
构建镜像
[root@localhost tomcat9]# podman build -f ./Dockerfile -t simon_tomcat9
STEP 1: FROM centos
STEP 2: MAINTAINER simon<cm.t@qq.com>
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STEP 3: COPY c.txt /usr/local/cincontainer.txt
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STEP 4: ADD apache-tomcat-9.0.38.tar.gz /usr/local/
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STEP 5: ADD jdk-8u261-linux-x64.tar.gz /usr/local/
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STEP 6: RUN yum install -y wget
CentOS-8 - AppStream 4.1 MB/s | 5.8 MB 00:01
CentOS-8 - Base 1.1 MB/s | 2.2 MB 00:01
CentOS-8 - Extras 10 kB/s | 8.1 kB 00:00
Last metadata expiration check: 0:00:01 ago on Fri Sep 18 23:41:52 2020.
Dependencies resolved.
================================================================================
Package Arch Version Repository Size
================================================================================
Installing:
wget x86_64 1.19.5-8.el8_1.1 AppStream 735 k
Installing dependencies:
libpsl x86_64 0.20.2-5.el8 BaseOS 61 k
publicsuffix-list-dafsa noarch 20180723-1.el8 BaseOS 56 k
Transaction Summary
================================================================================
Install 3 Packages
Total download size: 852 k
Installed size: 3.0 M
Downloading Packages:
(1/3): libpsl-0.20.2-5.el8.x86_64.rpm 247 kB/s | 61 kB 00:00 .2 kB --:-- ETA
(2/3): publicsuffix-list-dafsa-20180723-1.el8.n 168 kB/s | 56 kB 00:00
(3/3): wget-1.19.5-8.el8_1.1.x86_64.rpm 2.0 MB/s | 735 kB 00:00
--------------------------------------------------------------------------------
Total 648 kB/s | 852 kB 00:01
warning: /var/cache/dnf/AppStream-02e86d1c976ab532/packages/wget-1.19.5-8.el8_1.1.x86_64.rpm: Header V3 RSA/SHA256 Signature, key ID 8483c65d: NOKEY
CentOS-8 - AppStream 977 kB/s | 1.6 kB 00:00
Importing GPG key 0x8483C65D:
Userid : "CentOS (CentOS Official Signing Key) <security@centos.org>"
Fingerprint: 99DB 70FA E1D7 CE22 7FB6 4882 05B5 55B3 8483 C65D
From : /etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial
Key imported successfully
Running transaction check
Transaction check succeeded.
Running transaction test
Transaction test succeeded.
Running transaction
Preparing : 1/1
Installing : publicsuffix-list-dafsa-20180723-1.el8.noarch 1/3
Installing : libpsl-0.20.2-5.el8.x86_64 2/3
Installing : wget-1.19.5-8.el8_1.1.x86_64 3/3
Running scriptlet: wget-1.19.5-8.el8_1.1.x86_64 3/3
Verifying : wget-1.19.5-8.el8_1.1.x86_64 1/3
Verifying : libpsl-0.20.2-5.el8.x86_64 2/3
Verifying : publicsuffix-list-dafsa-20180723-1.el8.noarch 3/3
Installed:
libpsl-0.20.2-5.el8.x86_64 publicsuffix-list-dafsa-20180723-1.el8.noarch
wget-1.19.5-8.el8_1.1.x86_64
Complete!
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STEP 7: ENV MYPATH /usr/local
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STEP 8: WORKDIR $MYPATH
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STEP 9: ENV JAVA_HOME /usr/local/jdk1.8.0_261
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STEP 10: ENV CLASSPATH $JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar
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STEP 11: ENV CATALINA_HOME /usr/local/apache-tomcat-9.0.38
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STEP 12: ENV CATALINA_BASE /usr/local/apache-tomcat-9.0.38
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STEP 13: ENV PATH $PATH:$JAVA_HOME/bin:$CATALINA_HOME/lib:$CATALINA_HOME/bin
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STEP 14: EXPOSE 8080
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STEP 15: CMD /usr/local/apache-tomcat-9.0.38/bin/startup.sh && tail -F /usr/local/apache-tomcat-9.0.38/bin/logs/catalina.out
STEP 16: COMMIT simon_tomcat9
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[root@localhost tomcat9]#
[root@localhost tomcat9]# podman images
REPOSITORY TAG IMAGE ID CREATED SIZE
localhost/simon_tomcat9 latest c379423344cf 10 seconds ago 624 MB
docker.io/library/centos latest 0d120b6ccaa8 5 weeks ago 222 MB
验证：
[root@localhost tomcat9]# podman run -d -p 9080:8080 --name simon_tom9 -v /simon_data/dockerfile/tomcat9/test:/usr/local/apache-tomcat-9.0.38/webapps/test -v /simon_data/dockerfile/tomcat9/tomcat9logs/:/usr/local/apache-tomcat-9.0.38/logs --privileged=true simon_tomcat9
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[root@localhost tomcat9]#
[root@localhost tomcat9]# podman ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
65068137427d localhost/simon_tomcat9:latest /bin/sh -c /usr/l... 51 seconds ago Up 51 seconds ago 0.0.0.0:9080->8080/tcp simon_tom9
jsp测试：
[root@localhost ~]# cd /simon_data/dockerfile/tomcat9/test/
[root@localhost test]# ls
[root@localhost test]# cat a.jsp
<%@ page language="java" %>
<%@ page import="java.util.*" %>
<html>
<head>
<title>JSP test page.</title>
</head>
<body>
<% out.println("Hello,world!"); %>
</body>
[root@localhost test]#
附集群测试代码：
集群测试页面：
在TomcatA上某context中（如/test），提供如下页面
<%@ page language="java" %>
<html>
<head><title>TomcatA</title></head>
<body>
<h1><font color="red">TomcatA </font></h1>
<table align="centre" border="1">
<tr>
<td>Session ID</td>
<% session.setAttribute("abc","abc"); %>
<td><%= session.getId() %></td>
</tr>
<tr>
<td>Created on</td>
<td><%= session.getCreationTime() %></td>
</tr>
</table>
</body>
</html>
在TomcatB上某context中（如/test），提供如下页面
<%@ page language="java" %>
<html>
<head><title>TomcatB</title></head>
<body>
<h1><font color="blue">TomcatB </font></h1>
<table align="centre" border="1">
<tr>
<td>Session ID</td>
<% session.setAttribute("abc","abc"); %>
<td><%= session.getId() %></td>
</tr>
<tr>
<td>Created on</td>
<td><%= session.getCreationTime() %></td>
</tr>
</table>
</body>
</html>
