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Home Backend Development Golang How to debug docker-compose? Where is the configuration path set?

How to debug docker-compose? Where is the configuration path set?

Feb 10, 2024 pm 12:48 PM
Containerized applications

How to debug docker-compose? Where is the configuration path set?

php editor Xinyi will introduce you how to debug docker-compose and how to set the configuration path. Debugging docker-compose is an important step in troubleshooting containerized applications and helps developers identify errors and fix them. To debug docker-compose, you first need to check the docker-compose.yml file for syntax errors and typos. If the file is correct, you can use the command `docker-compose config` to verify the correctness of the configuration file. The configuration path is usually set in the docker-compose.yml file, and the `volumes` keyword can be used to specify the shared path between the container and the host. When configuring the path, you also need to pay attention to whether the path exists on the host to ensure that the container can correctly access the required files. Through the above method, you can easily debug docker-compose and set the configuration path.

Question content

I'm trying to debug docker-compose, i.e. this Go file, to solve some problem (this). To do this, I set up a GoLang debugger

go run main.go -f /.../project_root/docker-compose.yml -f /.../project_root/folder1/docker-compose.yml The output of config is as expected, Merged configuration files.

For some reason I can't find the config files set in the code, although they must be set somewhere because the output is the correctly merged config files. I suspect they must be set up somewhere near here or here. But in the former place, the value of cli.configFile is nil, and in the latter place, the value of o.ConfigPaths is nil.

So I have two questions:

  1. Where is the configuration file set? and
  2. (if unable to answer 1) What am I doing wrong when trying to simulate the behavior of the actual docker-compose command?

edit

Based on the above question and finding where the configuration path might be set, my question now is where to set the volume path.

Solution

What configuration paths? The path to the default configuration file (docker-compose.yaml) is set by the cli.withdefaultconfigpath method (in the compose-go repository) . Possible names for the default configuration are set here: 一>

The

withdefaultconfigpath method iterates this list, and if a matching file is found, it is applied to the configpaths field in the projectoptions structure, Here:

type projectoptions struct {
    projectname   string
    profiles      []string
    configpaths   []string
    workdir       string
    projectdir    string
    envfile       string
    compatibility bool
}
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withdefaultconfigpath method is applied in the toprojectoptions method, here:

func (o *ProjectOptions) toProjectOptions(po ...cli.ProjectOptionsFn) (*cli.ProjectOptions, error) {
    return cli.NewProjectOptions(o.ConfigPaths,
        append(po,
            cli.WithWorkingDirectory(o.ProjectDir),
            cli.WithOsEnv,
            cli.WithEnvFile(o.EnvFile),
            cli.WithDotEnv,
            cli.WithConfigFileEnv,
            cli.WithDefaultConfigPath,
            cli.WithName(o.ProjectName))...)
}
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