docker-compose 强势入门

关于docker-compose与docker

docker-compose是docker 之上的应用，也就是说脱离不开docker。与docker一样，有命令和配置文件。
docker的命令是：

Commands:
  attach      Attach local standard input, output, and error streams to a running container
  build       Build an image from a Dockerfile
  commit      Create a new image from a container's changes
  cp          Copy files/folders between a container and the local filesystem
  create      Create a new container
  diff        Inspect changes to files or directories on a container's filesystem
  events      Get real time events from the server
  exec        Run a command in a running container
  export      Export a container's filesystem as a tar archive
  history     Show the history of an image
  images      List images
  import      Import the contents from a tarball to create a filesystem image
  info        Display system-wide information
  inspect     Return low-level information on Docker objects
  kill        Kill one or more running containers
  load        Load an image from a tar archive or STDIN
  login       Log in to a Docker registry
  logout      Log out from a Docker registry
  logs        Fetch the logs of a container
  pause       Pause all processes within one or more containers
  port        List port mappings or a specific mapping for the container
  ps          List containers
  pull        Pull an image or a repository from a registry
  push        Push an image or a repository to a registry
  rename      Rename a container
  restart     Restart one or more containers
  rm          Remove one or more containers
  rmi         Remove one or more images
  run         Run a command in a new container
  save        Save one or more images to a tar archive (streamed to STDOUT by default)
  search      Search the Docker Hub for images
  start       Start one or more stopped containers
  stats       Display a live stream of container(s) resource usage statistics
  stop        Stop one or more running containers
  tag         Create a tag TARGET_IMAGE that refers to SOURCE_IMAGE
  top         Display the running processes of a container
  unpause     Unpause all processes within one or more containers
  update      Update configuration of one or more containers
  version     Show the Docker version information
  wait        Block until one or more containers stop, then print their exit codes

docker-compose的命令是：

Commands:
  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
  images             List images
  kill               Kill containers
  logs               View output from containers
  pause              Pause services
  port               Print the public port for a port binding
  ps                 List containers
  pull               Pull 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
  top                Display the running processes
  unpause            Unpause services
  up                 Create and start containers
  version            Show the Docker-Compose version information

命令使用上有区别，使用的时候注意下即可。接下来是文件
docker用:

Dockerfile

docker-compose用：

docker-compose.yml   #值得注意，yml的格式非常严格，一点不能错

关系就是：
docker-compose.yml配置的是编译Dockerfile或者运行images或者启动关闭容器的运行参数，比如卷，网卡等等。
换句话说，Dockerfile还是独立存在的，docker-compose.yml构建镜像配置中需要指明Dockerfile的位置。

docker-compose 简单示例

docker-compose的安装是独立于docker的，怎么安装自己去网上或者官网找
https://docs.docker.com/compose/
创建Dockerfile文件，并写入

FROM centos
RUN ls / > name.txt

创建docker-compose.yml文件，并写入

version: '3'
services:
    os: 
       build: .

注意：冒号后面必须空一格，再写内容，示例中的两个文件放在同一个路径

当前路径下，docker-compose up就可以了，后面直接查看
1。

2。

3。

docker-compose会自动给容器命名–当前目录名+服务名+序号–注意services（服务名）是在yml文件中自定义的，删除容器的时候，不能用容器名，要用服务名。

4。

docker-compose搞不定某个镜像或者容器，换docker处理便是

唠叨

关于docker入门也要学很多：
docker 命令
dockerfile语法 --重要
docker-compose命令
docker-compose.yml语法 --重要
理解其中的关系 --难找
关于网卡和虚拟网卡（vth）–难找 重要
目标docker应用
----------这只是入门，会用的程度 也是核心