Docker(二) docker-machine和docker-compose

docker images

docker container

单个应用程序 --非集群

Docker machine

docker machine是一个便于在多平台上部署Docker的一个工具；多平台比如：

• Amazon Web Services
• Microsoft Azure
• Digital Ocean
• Exoscale
• Google Compute Engine
• Generic
• Microsoft Hyper-V
• OpenStack
• Rackspace
• IBM Softlayer
• Oracle VirtualBox
• VMware vCloud Air
• VMware Fusion
• VMware vSphere
• VMware Workstation(plugin)

install docker-machine

$ curl -L https://github.com/docker/machine/releases/download/v0.13.0/docker-machine-`uname -s`-`uname -m` >/tmp/docker-machine &&chmod +x /tmp/docker-machine &&sudo cp /tmp/docker-machine /usr/local/bin/docker-machine

Configure Script

scripts=( docker-machine-prompt.bash docker-machine-wrapper.bash docker-machine.bash ); for i in "${scripts[@]}"; do sudo wget https://raw.githubusercontent.com/docker/machine/v0.13.0/contrib/completion/bash/${i} -P /etc/bash_completion.d; done

A demo

docker-machine create -d virtualbox localdocker-machine create --driver generic --generic-ip-address 10.0.0.4 vm02root@vm:/home/marion# docker-machine lsNAME    ACTIVE   DRIVER       STATE     URL                   SWARM   DOCKER        ERRORSlocal   -        virtualbox   Stopped                                 Unknown       vm01    -        generic      Running   tcp://10.0.0.3:2376           v17.11.0-ce root@vm:/home/marion# docker-machine create -d virtualbox defaultRunning pre-create checks...Creating machine...(default) Copying /root/.docker/machine/cache/boot2docker.iso to /root/.docker/machine/machines/default/boot2docker.iso...(default) Creating VirtualBox VM...(default) Creating SSH key...(default) Starting the VM...(default) Check network to re-create if needed...(default) Waiting for an IP...Waiting for machine to be running, this may take a few minutes...Detecting operating system of created instance...Waiting for SSH to be available...Detecting the provisioner...Provisioning with boot2docker...Copying certs to the local machine directory...Copying certs to the remote machine...Setting Docker configuration on the remote daemon...Checking connection to Docker...Docker is up and running!To see how to connect your Docker Client to the Docker Engine running on this virtual machine, run: docker-machine env default# 这是一个没有提供驱动的并且已经安装好docker engine的docker host. 但是依旧可以使用docker-machine管理$ docker-machine create --driver none --url=tcp://50.134.234.20:2376 custombox$ docker-machine lsNAME        ACTIVE   DRIVER    STATE     URLcustombox   *        none      Running   tcp://50.134.234.20:2376

docker machine默认使用的操作系统

• https://docs.docker.com/machine/drivers/os-base/

docker machine的新特性

• https://docs.docker.com/release-notes/docker-machine/

Docker machine的provider

docker machine provider

• 常见的linux系统
• 虚拟化平台-virtualbox,vmware,hyper-v
• openstack
• Amazon web services,Microsoft Azure,Google computer Engine,Digital Ocean等

安装docker machine

curl -L https://github.com/docker/machine/releases/download/v0.13.0/docker-machine-`uname -s`-`uname -m` >/tmp/docker-machine &&chmod +x /tmp/docker-machine &&sudo cp /tmp/docker-machine /usr/local/bin/docker-machine

安装bash completion脚本

• 手动下载位置
• 自动下载

scripts=( docker-machine-prompt.bash docker-machine-wrapper.bash docker-machine.bash ); for i in "${scripts[@]}"; do sudo wget https://raw.githubusercontent.com/docker/machine/v0.13.0/contrib/completion/bash/${i} -P /etc/bash_completion.d; done

安装virtualbox

Virtualbox package download url

# 下载deb安装包安装# 注意：如果你是在vmware上做的实验,请开启虚拟化Inter-VT/AMD-V

Docker-machine命令使用

Usage: docker-machine [OPTIONS] COMMAND [arg...]Create and manage machines running Docker.Version: 0.13.0, build 9ba6da9Author:  Docker Machine Contributors - Options:  --debug, -D                   Enable debug mode  --storage-path, -s "/root/.docker/machine"    Configures storage path [$MACHINE_STORAGE_PATH]  --tls-ca-cert                 CA to verify remotes against [$MACHINE_TLS_CA_CERT]  --tls-ca-key                  Private key to generate certificates [$MACHINE_TLS_CA_KEY]  --tls-client-cert                 Client cert to use for TLS [$MACHINE_TLS_CLIENT_CERT]  --tls-client-key              Private key used in client TLS auth [$MACHINE_TLS_CLIENT_KEY]  --github-api-token                Token to use for requests to the Github API [$MACHINE_GITHUB_API_TOKEN]  --native-ssh                  Use the native (Go-based) SSH implementation. [$MACHINE_NATIVE_SSH]  --bugsnag-api-token               BugSnag API token for crash reporting [$MACHINE_BUGSNAG_API_TOKEN]  --help, -h                    show help  --version, -v                 print the versionCommands:  active        Print which machine is active  config        Print the connection config for machine  create        Create a machine  env           Display the commands to set up the environment for the Docker client  inspect       Inspect information about a machine  ip            Get the IP address of a machine  kill          Kill a machine  ls            List machines  provision     Re-provision existing machines  regenerate-certs  Regenerate TLS Certificates for a machine  restart       Restart a machine  rm            Remove a machine  ssh           Log into or run a command on a machine with SSH.  scp           Copy files between machines  mount         Mount or unmount a directory from a machine with SSHFS.  start         Start a machine  status        Get the status of a machine  stop          Stop a machine  upgrade       Upgrade a machine to the latest version of Docker  url           Get the URL of a machine  version       Show the Docker Machine version or a machine docker version  help          Shows a list of commands or help for one command

参考链接

• Docker Machine安装
• Docker machine下载地址

Docker compose

docker compose就是通过yml文件来定义和运行多个容器docker应用程序的工具,三步过程就能跑起一个compose:

• 定义应用程序的环境(yml中)
• 定义组成应用程序的服务(docker-compose.yml)
• docker-compose up启动整个应用程序

安装docker compose

依赖：docker engine

# download the latest versionsudo curl -L https://github.com/docker/compose/releases/download/1.17.0/docker-compose-`uname -s`-`uname -m` -o /usr/local/bin/docker-compose# excutablesudo chmod +x /usr/local/bin/docker-compose# check versiondocker-compose --version

docker compose

Define and run multi-container applications with Docker.Usage:  docker-compose [-f ...] [options] [COMMAND] [ARGS...]  docker-compose -h|--helpOptions:  -f, --file FILE             Specify an alternate Compose file (default: docker-compose.yml)  -p, --project-name NAME     Specify an alternate project name (default: directory name)  --verbose                   Show more output  --no-ansi                   Do not print ANSI control characters  -v, --version               Print version and exit  -H, --host HOST             Daemon socket to connect to  --tls                       Use TLS; implied by --tlsverify  --tlscacert CA_PATH         Trust certs signed only by this CA  --tlscert CLIENT_CERT_PATH  Path to TLS certificate file  --tlskey TLS_KEY_PATH       Path to TLS key file  --tlsverify                 Use TLS and verify the remote  --skip-hostname-check       Don't check the daemon's hostname against the name specified                              in the client certificate (for example if your docker host                              is an IP address)  --project-directory PATH    Specify an alternate working directory                              (default: the path of the Compose file)  build              Build or rebuild services  bundle             Generate a Docker bundle from the Compose file  config             Validate and view the compose file  create             Create services  down               Stop and remove containers, networks, images, and volumes  events             Receive real time events from containers  exec               Execute a command in a running container  help               Get help on a command  kill               Kill containers  logs               View output from containers  pause              Pause services  port               Print the public port for a port binding  ps                 List containers  pull               Pulls service images  push               Push service images  restart            Restart services  rm                 Remove stopped containers  run                Run a one-off command  scale              Set number of containers for a service  start              Start services  stop               Stop services  unpause            Unpause services  up                 Create and start containers  version            Show the Docker-Compose version information

6.3 create a demo

• Create a directory for the project
• create application
• Create another file called requirements.txt in your project directory and paste this in
• Create a Dockerfile
• Define services in a Compose file (docker-compose.yml)
• Build and run your app with Compose
• access your application

6.4 deploy wordpress with docker-compose

version: '3'services:   db:     image: mysql:5.7     volumes:       - db_data:/var/lib/mysql     restart: always     environment:       MYSQL_ROOT_PASSWORD: rootpasswd       MYSQL_DATABASE: wordpress       MYSQL_USER: marion       MYSQL_PASSWORD: marionpasswd   wordpress:     depends_on:       - db     image: wordpress:latest     ports:       - "8000:80"     restart: always     environment:       WORDPRESS_DB_HOST: db:3306       WORDPRESS_DB_USER: marion       WORDPRESS_DB_PASSWORD: marionpasswdvolumes:    db_data:

docker compose ref link

• docker-compose user guide
• composefile Formate
• docker-compose overview
• 关于docker-compose的一些资料可以通过以上链接进行搜索
• docker-compose github
• compose and wordpress

docker service

分布式负载均衡服务方式,定义了服务在集群中是怎么运行的

docker swarm

• docker daemon port(2376)
• docker swarm manager port(2377)

# install docker-machine# 如果是在虚拟机中使用virtualbox,请开启虚拟化模式docker-machine create \ --driver virtualbox \ --virtualbox-boot2docker-url file:///home/marion/boot2docker-v17.09.1-ce.iso \ manager# docker-machine在创建docker host时会下载默认最新版本的boot2docker,但是因为网络会下载很慢甚至报错,因此先下载到本地docker-machine create \ --driver virtualbox \ --virtualbox-boot2docker-url file:///home/marion/boot2docker-v17.09.1-ce.iso \ worker# 查看docker host分配的信息root@dockermaster:~# docker-machine lsNAME      ACTIVE   DRIVER       STATE     URL                         SWARM   DOCKER        ERRORSmanager   -        virtualbox   Running   tcp://192.168.99.100:2376           v17.09.1-ce   worker    -        virtualbox   Running   tcp://192.168.99.101:2376           v17.09.1-ce   # 将manager节点启用集群管理模式,设置当前的manager为集群管理器docker-machine ssh manager "docker swarm init --advertise-addr 192.168.99.100"# 初始化后会返回添加node的命令# 添加worker加入swarmroot@dockermaster:~# docker-machine ssh worker "docker swarm join --token SWMTKN-1-2kcyacweb1kno0szfjrjob5ao2v8ie0k428riedz042hnzwhmq-7eegju6j34jisuhqbq9pet3mk 192.168.99.100:2377"This node joined a swarm as a worker.root@dockermaster:~# # 在manager上查看swarm中的节点root@dockermaster:~# docker-machine ssh manager "docker node ls"ID                            HOSTNAME            STATUS              AVAILABILITY        MANAGER STATUSp0fmsvxbpptktwwjjey7hzfat *   manager             Ready               Active              Leaderi8ef198m02bowqkx99nisgsjc     worker              Ready               Active              # 配置你的docker-machine shell终端scripts=( docker-machine-prompt.bash docker-machine-wrapper.bash docker-machine.bash ); for i in "${scripts[@]}"; do sudo wget https://raw.githubusercontent.com/docker/machine/v0.13.0/contrib/completion/bash/${i} -P /etc/bash_completion.d; done# 查看docker host的环境变量配置docker-machine env manager# Run this command to configure your shelleval $(docker-machine env manager)# 查看处在Active状态的docker host(有星号提示)root@dockermaster:~# docker-machine lsNAME      ACTIVE   DRIVER       STATE     URL                         SWARM   DOCKER        ERRORSmanager   *        virtualbox   Running   tcp://192.168.99.100:2376           v17.09.1-ce   worker    -        virtualbox   Running   tcp://192.168.99.101:2376           v17.09.1-ce root@dockermaster:~# docker stack deploy -c docker-compose.yaml managertestCreating network managertest_webnetCreating service managertest_webroot@dockermaster:~# docker stack ps managertestID                  NAME                IMAGE               NODE                DESIRED STATE       CURRENT STATE              ERROR               PORTSkno7kg5g2eil        managertest_web.1   nginx               manager             Running             Preparing 25 seconds ago                       kzu28xbn6th7        managertest_web.2   nginx               worker              Running             Preparing 25 seconds ago                       706xagf904f2        managertest_web.3   nginx               worker              Running             Preparing 25 seconds ago                       6phm8f6c9n2p        managertest_web.4   nginx               manager             Running             Preparing 25 seconds ago                       3ee4hhlspmme        managertest_web.5   nginx               worker              Running             Preparing 25 seconds ago                       root@dockermaster:~# eval $(docker-machine env -u)root@dockermaster:~# docker psCONTAINER ID        IMAGE                       COMMAND                CREATED             STATUS              PORTS                    NAMESa7ea6e30b068        grafana/grafana             "/run.sh"              6 hours ago         Up 39 minutes       3000/tcp                 grafana1a31b65a7fd4d        prom/node-exporter:latest   "/bin/node_exporter"   18 hours ago        Up 39 minutes       9100/tcp                 monitoring_node_exporter7c8311be2b4f        grafana/grafana             "/run.sh"              18 hours ago        Up 39 minutes       0.0.0.0:3000->3000/tcp   grafanaroot@dockermaster:~# eval $(docker-machine env worker)root@dockermaster:~# docker psCONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS              PORTS               NAMES73745f698d12        nginx:latest        "nginx -g 'daemon ..."   2 minutes ago       Up 2 minutes        80/tcp              managertest_web.2.kzu28xbn6th7c7dxnotn7f90v99c0c638629f        nginx:latest        "nginx -g 'daemon ..."   2 minutes ago       Up 2 minutes        80/tcp              managertest_web.3.706xagf904f2j97tlwy2kkh2o67dc57a4278e        nginx:latest        "nginx -g 'daemon ..."   2 minutes ago       Up 2 minutes        80/tcp              managertest_web.5.3ee4hhlspmmef8ksdstb92drdroot@dockermaster:~# eval $(docker-machine env manager)root@dockermaster:~# docker psCONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS              PORTS               NAMES4ca0c1899c55        nginx:latest        "nginx -g 'daemon ..."   3 minutes ago       Up 3 minutes        80/tcp              managertest_web.1.kno7kg5g2eilylcybo642493k354e61f3665b        nginx:latest        "nginx -g 'daemon ..."   3 minutes ago       Up 3 minutes        80/tcp              managertest_web.4.6phm8f6c9n2pb9811ud6e7wmproot@dockermaster:~# curl -I http://192.168.99.100HTTP/1.1 200 OKServer: nginx/1.13.7Date: Tue, 26 Dec 2017 08:32:24 GMTContent-Type: text/htmlContent-Length: 612Last-Modified: Tue, 21 Nov 2017 14:28:04 GMTConnection: keep-aliveETag: "5a1437f4-264"Accept-Ranges: bytesroot@dockermaster:~# curl -I http://192.168.99.101HTTP/1.1 200 OKServer: nginx/1.13.7Date: Tue, 26 Dec 2017 08:32:28 GMTContent-Type: text/htmlContent-Length: 612Last-Modified: Tue, 21 Nov 2017 14:28:04 GMTConnection: keep-aliveETag: "5a1437f4-264"Accept-Ranges: bytes# 增加副本或者减少副本,执行修改docker-compose.yaml文件vim docker-compose.yaml(replicats:3)eval $(docker-machine env manager)docker stack deploy -c docker-compose.yaml managertestdocker psroot@dockermaster:~# docker service ps managertest_webID                  NAME                IMAGE               NODE                DESIRED STATE       CURRENT STATE            ERROR               PORTS706xagf904f2        managertest_web.3   nginx               worker              Running             Running 14 minutes ago                       6phm8f6c9n2p        managertest_web.4   nginx               manager             Running             Running 15 minutes ago                       3ee4hhlspmme        managertest_web.5   nginx               worker              Running             Running 14 minutes agodocker stack ls                                            # List stacks or appsdocker stack deploy -c    # Run the specified Compose filedocker service ls                 # List running services associated with an appdocker service ps                   # List tasks associated with an appdocker inspect                    # Inspect task or containerdocker container ls -q                                      # List container IDsdocker stack rm                              # Tear down an applicationdocker swarm leave --force      # Take down a single node swarm from the manager