docker commands basic II

$ docker run -it --name cowsay --hostname cowsay debian bash

root@cowsay:/# apt-get update

cowsay fortuneroot@cowsay:/# apt-get install -y

root@cowsay:/# /usr/games/fortune | /usr/games/cowsay

 ________________________________________

/ ... A solemn, unsmiling, sanctimonious \

| old iceberg who looked like he was     |

| waiting for a vacancy in the Trinity.  |

|                                        |

\ -- Mark Twain                          /

 ----------------------------------------

        \   ^__^

         \  (oo)\_______

            (__)\       )\/\

                ||----w |

                ||     ||

$ docker commit cowsay test/cowsayimage

sha256:a07478457b89f1ae08fc65360987d3a675e544e1d0333c0fea21f36b7f5a6bd9

$ docker run test/cowsayimage /usr/games/cowsay "Moo"

 _____

< Moo >

 -----

        \   ^__^

         \  (oo)\_______

            (__)\       )\/\

                ||----w |

                ||     ||

$ cat Dockerfile

FROM debian:wheezy

RUN apt-get update && apt-get install -y cowsay fortune

$ docker build -t test/cowsay-dockerfile .

$ docker run test/cowsay-dockerfile /usr/games/cowsay "Moo"

 _____

< Moo >

 -----

        \   ^__^

         \  (oo)\_______

            (__)\       )\/\

                ||----w |

                ||     ||

$ docker info

Containers: 9

 Running: 1

 Paused: 0

 Stopped: 8

Images: 16

Server Version: 18.03.1-ce

Storage Driver: overlay2

 Backing Filesystem: extfs

 Supports d_type: true

 Native Overlay Diff: true

Logging Driver: json-file

Cgroup Driver: cgroupfs

Plugins:

 Volume: local

 Network: bridge host ipvlan macvlan null overlay

 Log: awslogs fluentd gcplogs gelf journald json-file logentries splunk syslog

Swarm: inactive

Runtimes: runc

Default Runtime: runc

Init Binary: docker-init

containerd version: 773c489c9c1b21a6d78b5c538cd395416ec50f88

runc version: 4fc53a81fb7c994640722ac585fa9ca548971871

init version: 949e6fa

Security Options:

 seccomp

  Profile: default

Kernel Version: 4.9.87-linuxkit-aufs

Operating System: Docker for Mac

OSType: linux

Architecture: x86_64

CPUs: 4

Total Memory: 1.952GiB

Name: linuxkit-025000000001

ID: ZD3Z:I2BF:UXMM:SEHS:NZZ4:ZQVK:U7XJ:GHUX:O5WJ:DXBW:A7RQ:U2ZT

Docker Root Dir: /var/lib/docker

Debug Mode (client): false

Debug Mode (server): true

 File Descriptors: 22

 Goroutines: 41

 System Time: 2018-07-09T02:19:20.006046842Z

 EventsListeners: 2

HTTP Proxy: docker.for.mac.http.internal:3128

HTTPS Proxy: docker.for.mac.http.internal:3129

Registry: https://index.docker.io/v1/

Labels:

Experimental: true

Insecure Registries:

 127.0.0.0/8

Live Restore Enabled: false

docker run하면 특정 command 실행시키도록 ENTRYPOINT 지정

$ cat Dockerfile

FROM debian:wheezy

RUN apt-get update && apt-get install -y cowsay fortune

ENTRYPOINT ["/usr/games/cowsay"]

$ cat entrypoint.sh

#!/bin/bash

if [ $# -eq 0 ]; then

    /usr/games/fortune | /usr/games/cowsay

else

    /usr/games/cowsay "$@"

fi

$ cat Dockerfile

FROM debian:wheezy

RUN apt-get update && apt-get install -y cowsay fortune

# copy host's entrypoint.sh to image's file system

# 1st arg is host's file, 2nd arg is image's path

COPY entrypoint.sh /

ENTRYPOINT ["/entrypoint.sh"]

$ chmod +x entrypoint.sh

$ docker build -t xxxx/cowsay .

Sending build context to Docker daemon  3.072kB

Step 1/4 : FROM debian:wheezy

 ---> 8f8122a1c206

Step 2/4 : RUN apt-get update && apt-get install -y cowsay fortune

 ---> Using cache

 ---> 249f7a895e02

Step 3/4 : COPY entrypoint.sh /

 ---> Using cache

 ---> 17256aa54c11

Step 4/4 : ENTRYPOINT ["/entrypoint.sh"]

 ---> Using cache

 ---> 7af0d077f7e6

Successfully built 7af0d077f7e6

Successfully tagged xxxx/cowsay:latest

$ docker push xxxx/cowsay

The push refers to repository [docker.io/xxxx/cowsay]

cac0325bc52a: Pushed

02e661870bb0: Pushed

76d132c56f63: Mounted from library/debian

latest: digest: sha256:4e7b218528ab9abb6bd5d6e896f1834d3304114bcee23367b5c6b9b18a9fe29d size: 948

$ docker build -t xxxx/cowsay:stable

$docker pull xxxx/cowsay