28-案列2：使用Supervisor管理容器多进程

1.容器里安装supervior，进入到容器中

[root@ff769b402f81 ~]# yum install supervisor -y

 2.修改配置supervisord文件，nodaemon=false改成true

[root@ff769b402f81 ~]# vi /etc/supervisord.conf 
        .......
     15 [supervisord]
     16 logfile=/var/log/supervisor/supervisord.log  ; (main log file;default $CWD/supervisord.log)
     17 logfile_maxbytes=50MB       ; (max main logfile bytes b4 rotation;default 50MB)
     18 logfile_backups=10          ; (num of main logfile rotation backups;default 10)
     19 loglevel=info               ; (log level;default info; others: debug,warn,trace)
     20 pidfile=/var/run/supervisord.pid ; (supervisord pidfile;default supervisord.pid)
     21 nodaemon=true             ; (start in foreground if true;default false)

 3.编辑dockerfile文件

[root@docker01 centos-ssh]# vim Dockerfile 

# Base Images
FROM centos

# Maintainer
MAINTAINER xiao@qq.com

# Run
RUN rpm -ivh https://mirrors.aliyun.com/epel/epel-release-latest-7.noarch.rpm
RUN yum install wget sudo git tree net-tools openssh-clients openssh-server openssl-devel supervisor -y && yum clean all
RUN ssh-keygen -t rsa -f /etc/ssh/ssh_host_rsa_key
RUN ssh-keygen -t ecdsa -f /etc/ssh/ssh_host_ecdsa_key
RUN ssh-keygen -A -t dsa -f /etc/ssh/ssh_host_dsa_key

# Set root passwd
RUN echo "root:123.com" | chpasswd

#For Supervisor
ADD supervisord.conf /etc/supervisord.conf
ADD sshd.ini /etc/supervisord.d/sshd.ini

#Outside port
EXPOSE 22

CMD ["/usr/bin/supervisord","-c","/etc/supervisord.conf"]

 4.编写sshd.ini启动文件

[root@docker01 centos-ssh]# vim sshd.ini

[program:sshd]
command=/usr/sbin/sshd -D
process_name=%(program_name)s 
autostart=true

 5.构建镜像

[root@docker01 centos-ssh]# docker build -t system/centos:v3 .

 6.启动镜像

[root@docker01 centos-ssh]# docker run -d --name centos-supervisor -p 2222:22 system/centos:v3
64e8ebc3a7da2958b923235403e93e131d2c49f17cd87e8fc6d59c26726385c1

 7.ssh到容器中

[root@docker01 centos-ssh]# ssh -p 2222 root@192.168.1.23
The authenticity of host '[192.168.1.23]:2222 ([192.168.1.23]:2222)' can't be established.
ECDSA key fingerprint is bb:e1:67:bc:00:85:9a:20:2e:3d:b6:88:9b:54:23:13.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added '[192.168.1.23]:2222' (ECDSA) to the list of known hosts.
root@192.168.1.23's password: 
[root@64e8ebc3a7da ~]# ps aux
USER        PID %CPU %MEM    VSZ   RSS TTY      STAT START   TIME COMMAND
root          1  0.1  0.7 115664 14800 ?        Ss   08:13   0:00 /usr/bin/python /usr/bin/supervisord -c /etc/supervisord.conf
root          7  0.0  0.2 112816  4272 ?        S    08:13   0:00 /usr/sbin/sshd -D
root          8  1.0  0.3 155236  6016 ?        Ss   08:14   0:00 sshd: root@pts/0
root         10  0.3  0.1  15256  1996 pts/0    Ss   08:14   0:00 -bash
root         23  0.0  0.0  55144  1844 pts/0    R+   08:14   0:00 ps aux
[root@64e8ebc3a7da ~]# supervisorctl status
sshd                             RUNNING   pid 7, uptime 0:02:22