runinit启动小程序测试

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怎么做的

```
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

``