问题描述
什么时候使用 docker service create 命令，什么时候使用 docker run 命令?
When do we use a docker service create command and when do we use a docker run command?
推荐答案
简而言之: Docker 服务主要用于在您使用 Docker swarm 配置主节点以便 docker 容器运行时在分布式环境中并且易于管理.
In short: Docker service is used mostly when you configured the master node with Docker swarm so that docker containers will run in a distributed environment and it can be easily managed.
Docker run: docker run 命令首先在指定的镜像上创建一个可写的容器层，然后使用指定的命令启动它.
Docker run: The docker run command first creates a writeable container layer over the specified image, and then starts it using the specified command.
即docker run相当于API/containers/create then/containers/(id)/start
That is, docker run is equivalent to the API /containers/create then /containers/(id)/start
来源:https://docs.docker.com/engine/reference/commandline/run/#parent-command
Docker 服务:Docker 服务将成为某些大型应用程序上下文中微服务的映像.服务示例可能包括 HTTP 服务器、数据库或您希望在分布式环境中运行的任何其他类型的可执行程序.
Docker service:Docker service will be the image for a microservice within the context of some larger application. Examples of services might include an HTTP server, a database, or any other type of executable program that you wish to run in a distributed environment.
创建服务时，您需要指定要使用的容器映像以及要在运行的容器内执行的命令.您还可以为服务定义选项，包括:
When you create a service, you specify which container image to use and which commands to execute inside running containers. You also define options for the service including:
- swarm 将使服务在 swarm 外部可用的端口
- 服务连接到群中其他服务的覆盖网络
- CPU 和内存限制和预留
- 滚动更新政策
- 要在 swarm 中运行的镜像副本数
来源:https://docs.docker.com/engine/swarm/how-swarm-mode-works/services/#services-tasks-and-containers
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