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安装s6及依赖，注意make版本一定要4.0以上.

wget http://skarnet.org/software/skalibs/skalibs-2.2.0.0.tar.gz
tar zxvf skalibs-2.2.0.0.tar.gz
cd skalibs-2.2.0.0
./configure && make && make install
wget http://skarnet.org/software/execline/execline-2.0.1.1.tar.gz
tar zxvf execline-2.0.1.1.tar.gz
cd execline-2.0.1.1
./configure && make && make install
wget http://skarnet.org/software/s6/s6-2.0.1.0.tar.gz
tar zxvf s6-2.0.1.0.tar.gz
cd s6-2.0.1.0
./configure && make && make install

s6启动时会依次执行目录下run命令:

mkdir -p /etc/s6/nginx/
mkdir -p /etc/s6/.s6-svscan
#启动命令
cat > /etc/s6/nginx/run << EOF
#!/bin/bash
nginx -c /etc/nginx/nginx.conf
EOF
chmod +x /etc/s6/nginx/run
#关闭命令
cat > /etc/s6/nginx/finish << EOF
#!/bin/bash
kill  `cat /var/run/nginx.pid`
EOF
chmod +x /etc/s6/nginx/finish

注意程序要以foreground非守护方式启动，如nginx要在配置文件添加：

daemon off;

当docker容器关闭时s6执行.s6-svscan/finish：

cat > /etc/s6/.s6-svscan/finish << EOF
#!/bin/bash
for file in /etc/s6/*/finish; do
   $file
done

for service in /etc/s6/* ; do
   s6-svwait -d $service
done
EOF
chmod +x /etc/s6/.s6-svscan/finish

docker容器启动时执行命令：

s6-svscan /etc/s6/
#-c 最大service数
#-t 重新扫描间隔，如果程序关闭会自动重启，毫秒，默认5秒

进程控制，重启：

s6-svc -t /etc/s6/nginx

关闭不重启：

s6-svc -d /etc/s6/nginx

更多：http://skarnet.org/software/s6/s6-svc.html
参考：
http://blog.tutum.co/2014/12/02/docker-and-s6-my-new-favorite-process-supervisor/
http://kfei.logdown.com/posts/245469-using-s6-as-the-init-process-for-muliple-service-docker-container

标签：docker, supervisor