使用客户端 API 进行 Docker Stack 部署

huangapple go评论88阅读模式
英文:

docker stack deploy using the client api

问题

我正在使用Docker的客户端API进行开发。我已经学会了如何运行容器、推送、拉取等操作。现在我想使用Compose文件部署一个堆栈,但我不认为在客户端API中有一个单一的函数调用可以实现这一点。我查看了Docker的代码,并找到了他们是如何实现的。

这是唯一的方法吗?我试图尽量减少依赖,但如果没有其他选择,我想我可以接受这种方式。另外,我对Go语言还不太熟悉,所以如果有人能提供一个通过Go代码实现docker stack deploy --compose-file file.yml的示例,我将非常感激。

英文:

I'm playing with docker's client api. I've seen how to run containers, pushing, pulling, etc. Now I want to deploy a stack with a compose file, but I don't think there's a one-func-call to do that (not in the client api anyway). I went trough docker's code and saw how they do it.

Is this the only way? I'm trying to keep the dependencies to a minimum, but if there aren't other options I guess I could live with it. Also I'm still pretty new to golang, so if someone could provide an example of how can I achieve docker stack deploy --compose-file file.yml though go code will be greatly appreciated.

答案1

得分: 4

经过进一步的研究,我认为有三种选择:

  1. 只使用os/exec包和exec.Command("docker", ...)。这个方法可以实现,但需要安装Docker客户端。

  2. 使用docker/client包提供的内容,并自己实现调用。这样可以获得最大的控制权,但需要实现复合调用(如docker stack deploy),例如创建镜像、网络、启动容器等。

  3. 使用docker/cli/command包提供的命令。这样你也可以访问一些可以覆盖的配置,并让Docker团队负责复合调用的问题。

我最终选择了第三种方法,以下是我的代码:

import (
	"os"
	"github.com/docker/docker/cli/command"
	"github.com/docker/docker/cli/command/stack"
	"github.com/docker/docker/cli/flags"
)

func main() {
	cli := command.NewDockerCli(os.Stdin, os.Stdout, os.Stderr)
	cli.Initialize(flags.NewClientOptions())
	cmd := stack.NewStackCommand(cli)
	
	// 这些参数会被命令包捕获,但如果需要的话,你可以进行覆盖
	// cmd.SetArgs([]string{"deploy", "--compose-file", "compose.yml", "mystack"})

	cmd.Execute()
}
英文:

After some more research I think I have 3 options:

  1. just use os/exec package and exec.Command("docker", ...). This is ok, but it requires the docker client

  2. use the stuff provided by the docker/client package and implement the call yourself. This gives you the most control, but you need to implement composite calls (docker stack deploy) e.g. create images, networks, start containers, etc.

  3. use the commands provided by the docker/cli/command package. This way you also have access to some configs that could be overriden and you let the docker guys worry about composite calls.

I ended up using #3, here's my code:

import (
	"os"
	"github.com/docker/docker/cli/command"
	"github.com/docker/docker/cli/command/stack"
	"github.com/docker/docker/cli/flags"
)

func main() {
	cli := command.NewDockerCli(os.Stdin, os.Stdout, os.Stderr)
    cli.Initialize(flags.NewClientOptions())
	cmd := stack.NewStackCommand(cli)
	
    // the command package will pick up these, but you could override if you need to
    // cmd.SetArgs([]string{"deploy", "--compose-file", "compose.yml", "mystack"})

	cmd.Execute()
}

huangapple
  • 本文由 发表于 2017年2月10日 17:36:03
  • 转载请务必保留本文链接:https://go.coder-hub.com/42155978.html
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