我怎么知道" init"或" systemd"控制码头工人?

时间:2016-07-14 08:29:23

标签: linux ubuntu docker init systemd

我按照官方documentDocker上安装Ubuntu 16.04 LTS。由于我的服务器在代理之后工作,所以我需要为Docker配置代理。在我的主机上运行的进程如下:

# ps -aef | grep init
root         1     0  0 03:05 ?        00:00:01 /sbin/init
# ps -aef | grep docker
root      3223     1  0 04:04 ?        00:00:00 /usr/bin/docker daemon -H fd://
root      3230  3223  0 04:04 ?        00:00:00 docker-containerd -l /var/run/docker/libcontainerd/docker-containerd.sock --runtime docker-runc --start-timeout 2m

由于docker的父进程为init,我修改了/etc/default/docker文件:

# cat /etc/default/docker
# Docker Upstart and SysVinit configuration file

#
# THIS FILE DOES NOT APPLY TO SYSTEMD
#
#   Please see the documentation for "systemd drop-ins":
#   https://docs.docker.com/engine/articles/systemd/
#

# Customize location of Docker binary (especially for development testing).
#DOCKER="/usr/local/bin/docker"

# Use DOCKER_OPTS to modify the daemon startup options.
#DOCKER_OPTS="--dns 8.8.8.8 --dns 8.8.4.4"

# If you need Docker to use an HTTP proxy, it can also be specified here.
export http_proxy="http://web-proxy.corp.xxxxxx.com:8080/"
export https_proxy="https://web-proxy.corp.xxxxxx.com:8080/"
......

但遗憾的是,这一变化并未生效。我怀疑Docker是否由systemd控制,所以我检查一下:

# systemctl status docker
● docker.service - Docker Application Container Engine
   Loaded: loaded (/lib/systemd/system/docker.service; enabled; vendor preset: enabled)
   Active: active (running) since Thu 2016-07-14 03:19:35 EDT; 2min 16s ago
     Docs: https://docs.docker.com
 Main PID: 3057 (docker)
    Tasks: 24
   Memory: 25.2M
      CPU: 531ms
   CGroup: /system.slice/docker.service
           ├─3057 /usr/bin/docker daemon -H fd://
           └─3064 docker-containerd -l /var/run/docker/libcontainerd/docker-containerd.sock --runtime docker-runc --start-timeout 2m
......

然后我按照post设置代理,现在可以了!

根据我的理解,由于此docker进程由init生成,因此应由它控制。但实际上,它似乎由systemd控制。我如何知道initsystemd是否会控制docker

1 个答案:

答案 0 :(得分:1)

在Ubuntu 16.04上,/sbin/init systemd。您可以确认二进制文件是由systemd-sysv包提供的:

dpkg -L systemd-sysv | grep /sbin/init 

此外,' init'只是systemd的符号链接:

$ ls -lthd /sbin/init
lrwxrwxrwx 1 root root 20 May 12 05:39 /sbin/init -> /lib/systemd/systemd