Docker hello world

docker

系統環境

lq@lq-OptiPlex-755:~$ uname -a
Linux lq-OptiPlex-755 3.16.0-30-generic #40~14.04.1-Ubuntu SMP Thu Jan 15 17:43:14 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux

docker須要運行在root用戶下，不然有其餘問題。。。

安裝命令

curl -sSL https://get.docker.com/ | bash -x

這個命令能夠查看安裝過程，建議先執行下 sudo apt-get update

hello world

root@lq-OptiPlex-755:/home/lq# docker search hello
NAME                           DESCRIPTION                                     STARS     OFFICIAL   AUTOMATED
hello-world                    Hello World! (an exampleDocker...    266          [OK]       
tutum/hello-world              Image to test docke. Has Apac...   31                            [OK]
google/nodejs-hello                                                                  15                            [OK]

.....

root@lq-OptiPlex-755:/home/lq# docker pull hello-world
Using default tag: latest
latest: Pulling from library/hello-world
78445dd45222: Pull complete 
Digest: sha256:c5515758d4c5e1e838e9cd307f6c6a0d620b5e07e6f927b07d05f6d12a1ac8d7
Status: Downloaded newer image for hello-world:latest

root@lq-OptiPlex-755:/home/lq# docker images
REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE
hello-world         latest              48b5124b2768        7 weeks ago         1.84 kB

root@lq-OptiPlex-755:/home/lq# docker run --name hh 48b5124b2768

Hello from Docker!
This message shows that your installation appears to be working correctly.

To generate this message, Docker took the following steps:
 1. The Docker client contacted the Docker daemon.
 2. The Docker daemon pulled the "hello-world" image from the Docker Hub.
 3. The Docker daemon created a new container from that image which runs the
    executable that produces the output you are currently reading.
 4. The Docker daemon streamed that output to the Docker client, which sent it
    to your terminal.

To try something more ambitious, you can run an Ubuntu container with:
 $ docker run -it ubuntu bash

Share images, automate workflows, and more with a free Docker ID:
 https://cloud.docker.com/

For more examples and ideas, visit:
 https://docs.docker.com/engine/userguide/

root@lq-OptiPlex-755:/home/lq# docker ps -a
CONTAINER ID        IMAGE               COMMAND             CREATED             STATUS                      PORTS               NAMES
e0065e063270        48b5124b2768        "/hello"            38 seconds ago      Exited (0) 36 seconds ago                       hh

root@lq-OptiPlex-755:/home/lq# docker rm e0065e063270
e0065e063270
root@lq-OptiPlex-755:/home/lq# docker rmi 48b5124b2768
Untagged: hello-world:latest
Untagged: hello-world@sha256:c5515758d4c5e1e838e9cd307f6c6a0d620b5e07e6f927b07d05f6d12a1ac8d7
Deleted: sha256:48b5124b2768d2b917edcb640435044a97967015485e812545546cbed5cf0233
Deleted: sha256:98c944e98de8d35097100ff70a31083ec57704be0991a92c51700465e4544d08
 

 

docker-enter

docker enter用途：

docker容器沒起sshd服務的時候，能夠使用nsenter進入docker容器。
直接使用nsenter步驟稍微複雜，能夠使用docker-enter

安裝

wget -P ~ https://github.com/yeasy/docker_practice/raw/master/_local/.bashrc_docker;

. ~/.bashrc_docker

 

docker-compose   

docker compose用途：

Docker Compose屬於一個「應用層」的服務，用戶能夠定義哪一個容器組運行哪一個應用，它支持動態改變應用，並在須要時擴展。 

安裝Compose

curl -L https://github.com/docker/compose/releases/download/1.11.2/docker-compose-`uname -s`-`uname -m` > /usr/local/bin/docker-compose

chmod +x /usr/local/bin/docker-compose

root@lq-OptiPlex-755:/usr/local/bin# docker-compose version
docker-compose version 1.11.2, build dfed245
docker-py version: 2.1.0
CPython version: 2.7.13
OpenSSL version: OpenSSL 1.0.1t  3 May 2016

 

docker-machine

docker machine用途：

Docker的安裝流程很是複雜，用戶須要登陸到相應的主機上，根據官方的安裝和配置指南來安裝Docker，而且不一樣的操做系統的安裝步驟也是不同的。而有了Machine後，無論是在筆記本、虛擬機仍是公有云實例上，用戶僅僅須要一個命令。

安裝Machine

curl -L https://github.com/docker/machine/releases/download/v0.10.0/docker-machine-`uname -s`-`uname -m` >/tmp/docker-machine &&
    chmod +x /tmp/docker-machine &&
    sudo cp /tmp/docker-machine /usr/local/bin/docker-machine

root@lq-OptiPlex-755:/usr/local/bin# docker-machine version docker-machine version 0.10.0, build 76ed2a6