Docker：基于自制openjdk8镜像 or 官方openjdk8镜像，制作tomcat镜像

一、制作openjdk8基础镜像【基于自定义alpine-3.18.0:v1 】

docker pull maven:3.5.0-jdk-8-alpine
78.56 MB
https://hub.docker.com/_/maven/tagspage=8&name=alpine

openjdk二进制下载地址
https://blog.csdn.net/fenglllle/article/details/124786948
https://adoptopenjdk.net/releases.html
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Dockerfile中，source /etc/profile不能加载的原因
为什么还需要选择使用他的原因：三中，tomcat普通用户交互式启动tomcat

#在 Docker 容器中，/etc/profile 文件不会在容器启动时自动执行，这是因为 Docker 容器通常不会启动交互式登录 shell，而是直接运行指定的命令。/etc/profile 和用户的 shell 配置文件（如 .bash_profile[root]、.bashrc[普通用户] 等）是在交互式登录 shell 中被加载的。如果容器启动命令不涉及启动一个交互式 shell，这些文件就不会被执行。
解决方法
如果你需要在 Docker 容器中自动加载 /etc/profile 或其他环境配置，你可以采取以下几种方法之一：
1. 修改容器的启动命令
确保容器启动时使用交互式 shell。例如，你可以在 Dockerfile 中设置 CMD 或 ENTRYPOINT 指令来启动一个 Bash shell：
这样，当你以交互式方式运行容器时（使用 docker run -it <image>），它将启动 Bash，该 Bash 会加载 /etc/profile。
2. 在 Dockerfile 中使用环境变量
对于一些简单的环境设置，你也可以直接在 Dockerfile 中使用 ENV 指令来设置环境变量，这样就不需要依赖 /etc/profile

root@ubuntu:~/system/openjdk# cat profile

export PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"

export PAGER=less
umask 022

# use nicer PS1 for bash and busybox ash
if [ -n "$BASH_VERSION" -o "$BB_ASH_VERSION" ]; then
	PS1='h:w$ '
# use nicer PS1 for zsh
elif [ -n "$ZSH_VERSION" ]; then
	PS1='%m:%~%# '
# set up fallback default PS1
else
	: "${HOSTNAME:=$(hostname)}"
	PS1='${HOSTNAME%%.*}:$PWD'
	[ "$(id -u)" -eq 0 ] && PS1="${PS1}# " || PS1="${PS1}$ "
fi

if [ -n "$BASH_VERSION" ] && [ "$BASH" != "/bin/sh" ]; then
	# if we're bash (and not /bin/sh bash), also source the bashrc
	# by default, bash sources the bashrc for non-login,
	# and only /etc/profile on login (-l). so, make it do both on login.
	# this ensures that login-shell bash (e.g. -bash or bash -l) still sources the
	# system bashrc, which e.g. loads bash-completion
	. /etc/bash/bashrc
fi

for script in /etc/profile.d/*.sh ; do
	if [ -r "$script" ] ; then
		. "$script"
	fi
done
unset script
export JAVA_HOME=/usr/local/jdk
export JRE_HOME=$JAVA_HOME/jre 
export PATH=$JAVA_HOME/bin:$JRE_HOME/bin:$PATH
export CLASSPATH=.$CLASSPATH:$JAVA_HOME/lib:$JRE_HOME/lib:$JAVA_HOME/lib/tools.jar


root@ubuntu:~/system/openjdk# tree ./
./
└── OpenJDK8U-jdk_x64_alpine-linux_hotspot_8u432b06.tar.gz
└── profile

root@ubuntu:~/system/openjdk# cat Dockerfile

#JDK Base Image 
#基于alpine-3.18.0:v1【官方镜像+自定义环境】
FROM registry.cn-hangzhou.aliyuncs.com/qiushi/alpine-3.18.0:v1
LABEL Image="Openjdk base"
ADD OpenJDK8U-jdk_x64_alpine-linux_hotspot_8u432b06.tar.gz  /usr/local/src/
RUN ln -s /usr/local/src/jdk8u432-b06   /usr/local/jdk
ADD profile /etc/profile
ENV JAVA_HOME /usr/local/jdk
ENV JRE_HOME $JAVA_HOME/jre
ENV PATH $JAVA_HOME/bin:$JRE_HOME/bin:$PATH
ENV CLASSPATH .$CLASSPATH:$JAVA_HOME/lib:$JRE_HOME/lib:$JAVA_HOME/lib/tools.jar


docker build -t registry.cn-hangzhou.aliyuncs.com/qiushi/alpine-3.18.0-openjdk-8u432b06:v1 .
docker push registry.cn-hangzhou.aliyuncs.com/qiushi/alpine-3.18.0-openjdk-8u432b06:v1


docker run -ti --rm registry.cn-hangzhou.aliyuncs.com/qiushi/alpine-3.18.0-openjdk-8u432b06:v1 sh


/ # java -version
openjdk version "1.8.0_432"
OpenJDK Runtime Environment (Temurin)(build 1.8.0_432-b06)
OpenJDK 64-Bit Server VM (Temurin)(build 25.432-b06, mixed mode)

/ # env
HOSTNAME=ba44d1f0c9fe
SHLVL=1
HOME=/root
JRE_HOME=/usr/local/jdk/jre
TERM=xterm
PATH=/usr/local/jdk/bin:/usr/local/jdk/jre/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
CLASSPATH=.:/usr/local/jdk/lib:/usr/local/jdk/jre/lib:/usr/local/jdk/lib/tools.jar
JAVA_HOME=/usr/local/jdk
PWD=/

/ # id www
uid=2024(www) gid=2024(www) groups=2024(www),2024(www)

二、制作tomcat 9 Base镜像【基于自制openjdk8基础镜像】

2.1 基于自定义的 JDK 基础镜像，构建出通用的自定义 Tomcat 基础镜像，此镜像后期会被多个业务的多个服务共同引用

2.2 JDK 版本和Tomcat 版本对应关系，如下：

https://tomcat.apache.org/whichversion.html

2.3 tomcat 8版本，官网已经没有维护了，使用tomcat 9版本

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wget https://mirrors.tuna.tsinghua.edu.cn/apache/tomcat/tomcat-9/v9.0.97/bin/apache-tomcat-9.0.97.tar.gz

cat Dockerfile

#Tomcat Base Image
#Tomcat Base Image
FROM registry.cn-hangzhou.aliyuncs.com/qiushi/alpine-3.18.0-openjdk-8u432b06:v1
#env
ENV TZ "Asia/Shanghai"
ENV LANG en_US.UTF-8
ENV TERM xterm
ENV TOMCAT_MAJOR_VERSION 9
ENV TOMCAT_MINOR_VERSION 9.0.97
ENV CATALINA_HOME /apps/tomcat
ENV APP_DIR ${CATALINA_HOME}/webapps

#tomcat
RUN mkdir /apps 
#添加系统账户
RUN  addgroup -g 2025 -S tomcat && 
     adduser -u 2025 -G tomcat -D -S -s /bin/sh  tomcat
ADD apache-tomcat-9.0.97.tar.gz /apps
RUN ln -s /apps/apache-tomcat-9.0.97 /apps/tomcat


docker build -t registry.cn-hangzhou.aliyuncs.com/qiushi/alpine-3.18.0-openjdk-8u432b06-v1-tomcat-9.0.97:v1  .
docker run -it --rm -p 8080:8080  registry.cn-hangzhou.aliyuncs.com/qiushi/alpine-3.18.0-openjdk-8u432b06-v1-tomcat-9.0.97:v1 sh
/ # /apps/tomcat/bin/catalina.sh start
Using CATALINA_BASE:   /apps/tomcat
Using CATALINA_HOME:   /apps/tomcat
Using CATALINA_TMPDIR: /apps/tomcat/temp
Using JRE_HOME:        /usr/local/jdk/jre
Using CLASSPATH:       /apps/tomcat/bin/bootstrap.jar:/apps/tomcat/bin/tomcat-juli.jar
Using CATALINA_OPTS:   
Tomcat started.

/ # netstat -ntulp
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address           Foreign Address         State       PID/Program name    
tcp        0      0 127.0.0.1:8005          0.0.0.0:*               LISTEN      14/java             
tcp        0      0 0.0.0.0:8080            0.0.0.0:*               LISTEN      14/java 
/ # env
HOSTNAME=3e8f4f50d5b6
TOMCAT_MINOR_VERSION=9.0.97
SHLVL=1
HOME=/root
JRE_HOME=/usr/local/jdk/jre
CATALINA_HOME=/apps/tomcat
TERM=xterm
PATH=/usr/local/jdk/bin:/usr/local/jdk/jre/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
APP_DIR=/apps/tomcat/webapps
LANG=en_US.UTF-8
CLASSPATH=.:/usr/local/jdk/lib:/usr/local/jdk/jre/lib:/usr/local/jdk/lib/tools.jar
TOMCAT_MAJOR_VERSION=9
JAVA_HOME=/usr/local/jdk
PWD=/
TZ=Asia/Shanghai


docker push registry.cn-hangzhou.aliyuncs.com/qiushi/alpine-3.18.0-openjdk-8u432b06-v1-tomcat-9.0.97:v1

三、构建业务镜像1【基于tomcat 9 Base镜像】

root@ubuntu:~/web# mkdir  tomcat/tomcat-app{1,2}.
root@ubuntu:~/web# tree tomcat
tomcat
├── apache-tomcat-9.0.97.tar.gz
├── Dockerfile
├── tomcat-app1
└── tomcat-app2
root@ubuntu:~/web/tomcat# tar xzvf apache-tomcat-9.0.97.tar.gz
root@ubuntu:~/web/tomcat# cp apache-tomcat-9.0.97/conf/server.xml  tomcat-app1/
root@ubuntu:~/web/tomcat# vim tomcat-app1/server.xml
......
<Host name="localhost" appBase="/data/tomcat/webapps"
unpackWARs="true" autoDeploy="true">
......
root@ubuntu:~/web/tomcat# cd tomcat-app1
root@ubuntu:~/web/tomcat/tomcat-app1# mkdir app
root@ubuntu:~/web/tomcat/tomcat-app1# echo "Tomcat Page in app1" > app/index.jsp
root@ubuntu:~/web/tomcat/tomcat-app1# tar zcf app.tar.gz app
root@ubuntu:~/web/tomcat/tomcat-app1# ls
app  app.tar.gz  server.xml
root@ubuntu:~/web/tomcat/tomcat-app1# cat run_tomcat.sh
#!/bin/bash
echo "nameserver 192.168.31.1" > /etc/resolv.conf
su - tomcat -c "/apps/tomcat/bin/catalina.sh start"
su - tomcat -c "tail -f /etc/hosts"
root@ubuntu:~/web/tomcat/tomcat-app1# chmod a+x run_tomcat.sh

root@ubuntu:~/web/tomcat/tomcat-app1# cat Dockerfile

#Tomcat Web Image
FROM registry.cn-hangzhou.aliyuncs.com/qiushi/alpine-3.18.0-openjdk-8u432b06-v1-tomcat-9.0.97:v1
ADD server.xml /apps/tomcat/conf/server.xml
ADD run_tomcat.sh /apps/tomcat/bin/run_tomcat.sh
ADD app.tar.gz /data/tomcat/webapps/
RUN chown -R tomcat.tomcat /apps/ /data/tomcat/
EXPOSE 8080 
CMD ["/apps/tomcat/bin/run_tomcat.sh"]


root@ubuntu:~/web/tomcat/tomcat-app1# docker build -t registry.cn-hangzhou.aliyuncs.com/qiushi/alpine-3.18.0-openjdk-8u432b06-v1-tomcat-9.0.97-v1-app1:v1 .
root@ubuntu:~/web/tomcat/tomcat-app1# docker push  registry.cn-hangzhou.aliyuncs.com/qiushi/alpine-3.18.0-openjdk-8u432b06-v1-tomcat-9.0.97-v1-app1:v1


docker run -ti --rm -p 8080:8080 registry.cn-hangzhou.aliyuncs.com/qiushi/alpine-3.18.0-openjdk-8u432b06-v1-tomcat-9.0.97-v1-app1:v1
Using CATALINA_BASE:   /apps/tomcat
Using CATALINA_HOME:   /apps/tomcat
Using CATALINA_TMPDIR: /apps/tomcat/temp
Using JRE_HOME:        /usr/local/jdk/jre
Using CLASSPATH:       /apps/tomcat/bin/bootstrap.jar:/apps/tomcat/bin/tomcat-juli.jar
Using CATALINA_OPTS:   
Tomcat started.
127.0.0.1	localhost
::1	localhost ip6-localhost ip6-loopback
fe00::0	ip6-localnet
ff00::0	ip6-mcastprefix
ff02::1	ip6-allnodes
ff02::2	ip6-allrouters
192.168.100.2	79a46dbde53f

在这里插入图片描述