env

Documentation

Index

• func Read(key string) (string, error)
• type Watcher
  • func Once(f ...daemon.WatcherConfigFunc) *Watcher
  • func (w *Watcher) Read() error

Functions

func Read

func Read(key string) (string, error)

Read retrieves the value of the environment variable named by the key. As an alternative to passing sensitive information via environment variables, _FILE may be appended to the previously listed environment variables, causing the initialization script to load the values for those variables from files present in the container. In particular, this can be used to load passwords from Docker secrets stored in /run/secrets/<secret_name> files.

https://docs.docker.com/engine/swarm/secrets/ https://docs.docker.com/compose/compose-file/compose-versioning/#version-31

docker-compose.yml ------------------ version: "3.1"

secrets:

mypassword:
  external: true

services:

app:
  image: your-app-in-docker-image
  environment:
    - PASSWORD_FILE=/run/secrets/mypassword
    - LOGIN=mylogin

EXAMPLE:

passwd, _ := env.Read("PASSWORD") // reading from PASSWORD_FILE login, _ := end.Read("LOGIN") // reading from LOGIN.

Types

type Watcher

type Watcher struct {
	// contains filtered or unexported fields
}

func Once

func Once(f ...daemon.WatcherConfigFunc) *Watcher

Once .

func (*Watcher) Read

func (w *Watcher) Read() error