[svc]runinit管理多进程

runinit启动小程序测试

与Supervisord类似的工具包括monit, daemontools和runit。

我还发现个神器,专门针对单容器启动多进程的神器s6: https://github.com/just-containers/s6-overlay

参考: https://github.com/faisyl/alpine-runit/blob/master/Dockerfile

https://segmentfault.com/a/1190000006644578

安装

# apt-get install runit

如果是centos，则可以使用yum进行安装，但是默认情况下centos软件仓库里并没有runit，所以需要先配置相应的仓库：
# curl -s https://packagecloud.io/install/repositories/imeyer/runit/script.rpm.sh | sudo bash
# sudo yum install runit-2.1.1-7.el7.centos.x86_64

runinit启动小程序测试

- 创建目录(2个run文件,+x)
root@no1:~# tree test/
test/
├── log
│   └── run
└── run

- 新建run(程序启动命令)
root@no1:~# cat test/run
#!/bin/sh
exec 2>&1
echo $date
echo "-------------------"

- 新建run(日志处理)
root@no1:~# cat test/log/run
#!/bin/sh
LOGDIR=/var/log/test
mkdir -p $LOGDIR
# Prefix each line with a timestamp
exec svlogd -tt $LOGDIR

- 让runint管理
cp -rp test /etc/service/

- 查看运行状态
root@no1:~# tail -f /var/log/test/current
2017-12-28_10:42:48.60753
2017-12-28_10:42:48.60757 -------------------
2017-12-28_10:42:49.60933

查看calico使用runinit怎么启动多进程的

docker run -it --rm quay.io/calico/node sh

$ ls available/
bird               bird6              calico-bgp-daemon  confd              felix              libnetwork

$ cat available/bird/run
#!/bin/sh
exec 2>&1
exec bird -R -s /var/run/calico/bird.ctl -d -c /etc/calico/confd/config/bird.cfg

$ cat available/bird/log/run
#!/bin/sh
LOGDIR=/var/log/calico/bird
mkdir -p $LOGDIR
# Prefix each line with a timestamp
exec svlogd -tt $LOGDIR

- 查看进程的日志(时间是runinit搞的)
tail -f /var/log/test/current
2017-12-28_13:15:24.81191
2017-12-28_13:15:24.81196 -------------------
2017-12-28_13:15:25.81559
2017-12-28_13:15:25.81565 -------------------