• docker exec
  • login docker container as root
• docker run
  • run into dind
  • run to override entrypoint
  • run commands to override entrypoint
  • runtime options with memory, cpus, and gpus
  • run with always restart

docker exec

login docker container as root

$ docker run -d <image>:<tag>
$ docker exec --privileged -u root -it <image-id> /bin/bash

docker run

run into dind

$ docker run \
         --name "marslo" \
         --entrypoint /bin/bash \
         --privileged \
         --rm \
         -it \
         -v /var/run/docker.sock:/var/run/docker.sock \
         docker:dind

$ ubuntu@01acbffd94ec:~$ docker --version
Docker version 18.06.1-ce, build e68fc7a

run to override entrypoint

$ docker run \
         --name marslo \
         -it \
         --entrypoint /bin/bash \
         docker:dind

run commands to override entrypoint

$ docker run  \
         -it  \
         --rm \
         --entrypoint /bin/bash \
         docker:dind \
         -c 'cat /etc/*-release'

runtime options with memory, cpus, and gpus

reference:

• Docker容器CPU、memory资源限制
• Memory Resource Controller
• CPU Accounting Controller
• CFS Bandwidth Control
• RedHat: 3.3. CPUACCT
• RedHat: 3.4. CPUSET

• memory

  $ docker run \
           --name marslo \
           -it \
           --entrypoint /bin/bash \
           --memory=4G \
           --oom-kill-disable \         // optional
           docker:dind
  

• cpu

  $ docker run \
           --name marslo \
           -it \
           --entrypoint /bin/bash \
           --cpus="4" \
           docker:dind
  

run with always restart

$ docker run \
         -d \
         --name ss-libev \
         --restart=always \
         -p 8443:8443 \
         -p 8443:8443/udp \
         -v /etc/shadowsocks-libev:/etc/shadowsocks-libev \
         teddysun/shadowsocks-libev

• visit via

  $ docker exec -it ss-libev /bin/sh