需求：
使用docker来启动nginx + tomcat 双进程，实际应用中，多进程还是比较常见的。
1: 创建dockerfile目录
2: 编写dockerfile: /docker/web/Dockerfile
FROM centos7
MAINTAINER lin test@163.com
COPY CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo
COPY nginx_install.sh /tmp/nginx_install.sh
RUN sh /tmp/nginx_install.sh; \rm -rf /usr/local/src/*
RUN sed -i -e '/worker_processes/a daemon off;' /usr/local/nginx/conf/nginx.conf;
COPY jdk-8u162-linux-x64.tar.gz /usr/local/src/jdk-8u162-linux-x64.tar.gz
COPY tomcat_install.sh /tmp/tomcat_install.sh
RUN sh /tmp/tomcat_install.sh; \rm -rf /usr/local/src/*
COPY supervisor_install.sh /tmp/supervisor_install.sh
COPY supervisord.conf /etc/supervisord.conf
COPY start_tomcat.sh /usr/local/tomcat/bin/mystart.sh
RUN sh /tmp/supervisor_install.sh; \rm -rf /tmp/*.sh
3: dockerfile集成的配置文件及安装文件
3.1 默认源下载较慢，更换yum源，以下CentOS-Base.repo配置文件拷贝到容器里更换
COPY CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo
[root@docker web]# cat CentOS-Base.repo
[base]
name=CentOS-$releasever - Base
baseurl=http://mirrors.163.com/centos/$releasever/os/$basearch/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
#released updates
[updates]
name=CentOS-$releasever - Updates
baseurl=http://mirrors.163.com/centos/$releasever/updates/$basearch/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
#additional packages that may be useful
[extras]
name=CentOS-$releasever - Extras
baseurl=http://mirrors.163.com/centos/$releasever/extras/$basearch/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
#additional packages that extend functionality of existing packages
[centosplus]
name=CentOS-$releasever - Plus
baseurl=http://mirrors.163.com/centos/$releasever/centosplus/$basearch/
gpgcheck=1
enabled=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
3.2nginx安装脚本
[root@docker web]# cat nginx_install.sh
yum install -y wget tar gcc gcc-c++ make pcre pcre-devel zlib zlib-devel openssl openssl-devel
cd /usr/local/src
wget 'http://nginx.org/download/nginx-1.12.2.tar.gz'
tar -zxvf nginx-1.12.2.tar.gz
cd nginx-1.12.2
./configure --prefix=/usr/local/nginx --with-http_ssl_module --with-stream --with-stream_ssl_module
make
make install
exit 0
3.3tomcat安装脚本
[root@docker web]# cat tomcat_install.sh
yum install -y wget tar
cd /usr/local/src/
tar -zxvf jdk-8u162-linux-x64.tar.gz
mv jdk1.8.0_162 /usr/local/
#/usr/local/jdk1.8.0_162/bin/java -version
#配置java环境变量
echo 'JAVA_HOME=/usr/local/jdk1.8.0_162/' >>/etc/profile
echo 'PATH=$PATH:$JAVA_HOME/bin' >>/etc/profile
echo 'CLASSPATH=.:$JAVA_HOME/lib/tools.jar:$JAVA_HOME/lib/dt.jar:$CLASSPATH' >>/etc/profile
source /etc/profile
wget https://mirrors.tuna.tsinghua.edu.cn/apache/tomcat/tomcat-8/v8.5.38/bin/apache-tomcat-8.5.38.tar.gz
tar -zxvf apache-tomcat-8.5.38.tar.gz
mv apache-tomcat-8.5.38 /usr/local/tomcat
3.4dockerfile文件中涉及到的配置文件、脚本、安装包如下
[root@docker web]# ll
total 185384
-rw-r--r-- 1 root root 835 Mar 9 01:12 CentOS-Base.repo
-rw-r--r-- 1 root root 669 Mar 9 01:11 Dockerfile
-rw-r--r-- 1 root root 189815615 Mar 9 01:15 jdk-8u162-linux-x64.tar.gz
-rw-r--r-- 1 root root 340 Mar 9 01:13 nginx_install.sh
-rw-r--r-- 1 root root 581 Mar 9 01:17 tomcat_install.sh
4: 一键安装supervisor: /docker/web/supervisor_install.sh
yum -y install epel-release
yum -y install python2-pip
pip install supervisor
5: supervisor配置文件: /docker/web/supervisord.conf
[unix_http_server]
file=/tmp/supervisor.sock ; the path to the socket file
[supervisord]
logfile=/tmp/supervisord.log ; 日志
logfile_maxbytes=50MB ; 最大50M日志
logfile_backups=10 ; 轮循日志备份10个
loglevel=info ; 日志等级记录info的
pidfile=/tmp/supervisord.pid ;pid
nodaemon=true ;在前台启动
minfds=102400 ; 文件描述符限制
minprocs=2000 ; 进程数
[rpcinterface:supervisor]
supervisor.rpcinterface_factory = supervisor.rpcinterface:make_main_rpcinterface
[supervisorctl]
serverurl=unix:///tmp/supervisor.sock ; use a unix:// URL for a unix socket
[program:nginx]
command=/usr/local/nginx/sbin/nginx ; 前台启动nginx
autostart=true ; 随着supervisor自动启动
startsecs=10 ; 启动10s后算正常启动
autorestart=true ; 程序退出后自动重启
startretries=3 ; 启动失败自动重试次数
stdout_logfile_maxbytes=20MB ;stdout 日志文件大小最大20Mb
stdout_logfile=/usr/local/nginx/logs/out.log
[program:tomcat]
command=sh /usr/local/tomcat/bin/mystart.sh ; 前台启动tomcat
autostart=true ; 随着supervisor自动启动
startsecs=10 ; 启动10s后算正常启动
autorestart=true ; 程序退出后自动重启
startretries=3 ; 启动失败自动重试次数
stdout_logfile_maxbytes=20MB ;stdout 日志文件大小最大20Mb
stdout_logfile=/usr/local/tomcat/logs/catalina.out
6: tomcat的启动脚本/docker/web/start_tomcat.sh
#由于supervisor无法使用source，需要编写个脚本来启动
source /etc/profile
/usr/local/tomcat/bin/catalina.sh run
7: 构建镜像
cd /docker/web
docker build -t shijiange_web .
[root@docker web]# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
shijiange_web latest bc06a9974252 7 seconds ago 1.33 GB
8: 启动容器测试
[root@docker web]# docker run -d shijiange_web /bin/bash -c 'supervisord -c /etc/supervisord.conf'
76782ab71c3b1d2f818ad76214d6336ae11a524eeb9d211f154fe4ad5226015d
[root@docker web]#
[root@docker web]# docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
76782ab71c3b shijiange_web "container-entrypo..." 12 seconds ago Up 12 seconds happy_jones
9.测试验证：
[root@docker web]# docker exec -it 76782ab /bin/bash
bash-4.2# ifconfig
10.容器验证：curl nginx
11.容器验证：curl tomcat
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持脚本之家。
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