如何将配置文件推送到新的oryd / hydra docker映像？

Question

I am using the oryd/hydra docker image: https://hub.docker.com/r/oryd/hydra in order to build a custom image with my own configuration.

I did create a custom directory:

mkdir sso-demo-hydra
cd sso-demo-hydra

then I create a Dockerfile using that syntax:

vi Dockerfile

the file content:

$ cat Dockerfile

FROM oryd/hydra:latest

COPY .hydra /

when building the image I get no error:

$ docker build -t sso-demo-hydra .

Sending build context to Docker daemon 8.704kB

Step 1/2 : FROM oryd/hydra:latest

---> 50f0a70dbda9

Step 2/2 : COPY .hydra /

---> Using cache

---> 3539634979c0

Successfully built 3539634979c0

Successfully tagged sso-demo-hydra:latest

SECURITY WARNING: You are building a Docker image from Windows against a non-Windows Docker host. All files and directories added to build context will have '-rwxr-xr-x' permissions. It is recommended to double check and reset permissions for sensitive files and directories.

And when I launch the application I get the following warning:

sso-demo-hydra | Config file not found because "Config File ".hydra" Not Found in "[/]""

PS: there is a .hydra file in the context directory

Thanks for your support.

Answer 1

See github source code of this docker image, the related code is as next:

func initConfig() {
    if cfgFile != "" {
        // enable ability to specify config file via flag
        viper.SetConfigFile(cfgFile)
    } else {
        path := absPathify("$HOME")
        if _, err := os.Stat(filepath.Join(path, ".hydra.yml")); err != nil {
            _, _ = os.Create(filepath.Join(path, ".hydra.yml"))
        }

        viper.SetConfigType("yaml")
        viper.SetConfigName(".hydra") // name of config file (without extension)
        viper.AddConfigPath("$HOME")  // adding home directory as first search path
    }

    viper.SetDefault("LOG_LEVEL", "info")

    viper.SetEnvKeyReplacer(strings.NewReplacer(".", "_"))
    viper.AutomaticEnv() // read in environment variables that match

    // If a config file is found, read it in.
    if err := viper.ReadInConfig(); err != nil {
        fmt.Printf(`Config file not found because "%s"`, err)
        fmt.Println("")
    }
}

From above, you can see in fact what it expected is .hydra.yml, not .hydra, .hydra just the one which remove extension:

viper.SetConfigName(".hydra") // name of config file (without extension)

So the root cause is: its error indication not friendly which make you encountered problem, change to use .hydra.yml could make it ok.