最近在找工作，在万年俱灰之际，Sheldon老师找到我，说有个测试岗位适合，我特别珍惜这次机会，老师给了一些资料让我学习，周三就去他们办公室见个面。
学习资料如下：
安装一个 Docker 的环境
[https://github.com/dwyl/learn-docker](https://github.com/dwyl/learn-docker)
运维相关
[https://logz.io/learn/docker-monitoring-elk-stack/](https://logz.io/learn/docker-monitoring-elk-stack/)
DockerFile的最佳实践
[https://docs.docker.com/develop/develop-images/dockerfile_best-practices/](https://docs.docker.com/develop/develop-images/dockerfile_best-practices/)
Kubernetes 是 Google 开源的容器集群管理系
阅读下官方教程
[https://kubernetes.io/docs/home/](https://kubernetes.io/docs/home/)
BootCamp教程
[https://kubernetesbootcamp.github.io/kubernetes-bootcamp/](https://kubernetesbootcamp.github.io/kubernetes-bootcamp/)
我对docker的理解，它是一个开源的类虚拟机的东西，有着比虚拟机优秀的性能，能快速封装软件环境，提供微服务。docker有三层，从低到高分别是container、service 、stack. 底层的container相当于image的实例，service相当于某一个功能，比如数据库、app、前端等；stack通过YAML格式的compose文件将服务组装起来。其中的docker-machine能轻易地实现分布式应用以及部署。
以下是官方常用命令：
# docker build -t hello . Create image using this directory's Dockerfile
# docker run -p 4000:80 hello Run friendlyname mapping port 4000 to 80
# docker run -d -p 4000:80 hello Same thing, but in detached mode
# docker container ls List all running containers
# docker container ls -a List all containers, even those not running
# docker container stop <hash> Gracefully stop the specified container
# docker container kill <hash> Force shutdown of the specified container
# docker container rm <hash> Remove specified container from this machine
# docker container rm $(docker image ls -a -q) Remove all containers
# docker image ls -a List all images on this machine
# docker image rm <image id> remove sepcified image from this machine
# docker image rm $(docker image ls -a -q) Remove all images from this machine
# docker login Login in this CLI session using your Docker credentials
# docker tag <image> username/repositoty:tag # Tag <image> for upload to registry
# docker push username/repository:tag #Upload taged image to registry
# docker run username/repository:tag # Run image from a registry
# docker stack ls # List stacks or apps
# docker stack deploy -c <composefile> <appname># Run the sepcified Compose file
# docker service ls # List running services associated with an app
# docker service ps <service> # List tasks associated with an app
# docker inspect <task or container> # Inspect task or container
# docker container ls -q # List container IDs
# docker stack rm <appname> # Tear down an application
# docker swarm leave --force # Take down a sigle node swarm from the manager
# docker-machine ssh myvm1 "docker swarm init --advertise-addr <myvm1 ip>"
# docker-machine create myvm2 -d virtualbox --virtualbox-boot2docker-url=/Users/purson/.docker/machine/cache/boot2docker.iso #create a vm
# docker-machine env myvm1 # View basic information about your node
# docker-machine ssh myvm1 "docker ls node" #List the nodes in your swarm
# docker-machine ssh myvm1 "docker inspect <node ID>" #Inspect a node
# docker-machine ssh myvm1 "docker swarm join-token -q worker" # View join token
# docker-machine ssh myvm1 # Open a SSH session with the VM; type 'exit' to end
# docker node list # View nodes in Swarm(while log on to manager)
# docker-machine ssh myvm2 "docker swarm leave" # Make the worker leave the swarm
# docker-machine ssh myvm1 "docker swarm leave -f" # Make master leave, kill swarm
# docker-machine ls # List VMs , astrisk shows which VM this shell is talking to
# docker-machine start myvm1 # Start a VM that is currently not running
# docker-machine env myvm1 # Show envirement variables and command for myvm1.
# eval $(docker-machine env myvm1) # Mac command to connect shell to myvm1
# docker stack deploy -c <file> <app> # Deploy an app; command shell must be set to talk to manager(myvm1), uses local compose file
# docker-machine scp docker-compose.yml myvm1:~ # Copy file to node's home dir (only required if you use ssh connect to manager and deploy the app )
# docker-machine ssh myvm1 "docker stack deploy -c <file> <app>" # Deploy an app using ssh(you must have first copied the Compose file to myvm1)
# eval $(docker-machine env -u) #Disconnect shell from vms, use native docker
# docker-machine stop $(docker-machine ls -q)# Stop all running VMs
# docker-machine rm $(docker-machine ls -q) # Delete all VMs and their disk images
有几个阅读官方文档踩过的坑：
官方文档地址：https://docs.docker.com/get-started/
1.app.py文件最后一句 if name == "main": 没有indent, 导致服务无法开启。
2.虚拟机启动，由于我用手机热点，加上github慢，所以不能用docker-machine create --driver virtualbox myvm1，先将boot2docker.iso下载到本地，
改为：docker-machine create myvm2 -d virtualbox --virtualbox-boot2docker-url=/Users/purson/.docker/machine/cache/boot2docker.iso
3.在第四节 swarm，使用docker stack deploy -c 无法访问分布式节点，目前还未有解，先把整个流程看完再算。
阅读运维相关的https://logz.io/learn/docker-monitoring-elk-stack/ 踩到的坑：
1.在构建java环境的时候，由于ubuntu 16.10不再被支持，所以无法下载相关包，最后Dockerfile更改了ubuntu版本为16.04，源更换为清华的：
FROM ubuntu:16.04
MAINTAINER Author name
RUN rm /etc/apt/sources.list
RUN echo "deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial main restricted \
deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial-updates main restricted \
deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial universe \
deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial-updates universe \
deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial multiverse \
deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial-updates multiverse \
deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial-backports main restricted universe multiverse \
deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial-security main restricted \
deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial-security universe \
deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial-security multiverse \
" > /etc/apt/sources.list
RUN apt-get update
RUN apt-get install -y python-software-properties software-properties-common
RUN \
echo oracle-java8-installer shared/accepted-oracle-license-v1-1 select true | debconf-set-selections && \
add-apt-repository -y ppa:webupd8team/java && \
apt-get update && \
apt-get install -y oracle-java8-installer
RUN useradd -d /home/esuser -m esuser
WORKDIR /home/esuser
ENV JAVA_HOME /usr/lib/jvm/java-8-oracle
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