mirror of
https://github.com/moby/moby.git
synced 2022-11-09 12:21:53 -05:00
122 lines
4.2 KiB
Markdown
122 lines
4.2 KiB
Markdown
---
|
|
title: "login"
|
|
description: "The login command description and usage"
|
|
keywords: "registry, login, image"
|
|
---
|
|
|
|
<!-- This file is maintained within the docker/docker Github
|
|
repository at https://github.com/docker/docker/. Make all
|
|
pull requests against that repo. If you see this file in
|
|
another repository, consider it read-only there, as it will
|
|
periodically be overwritten by the definitive file. Pull
|
|
requests which include edits to this file in other repositories
|
|
will be rejected.
|
|
-->
|
|
|
|
# login
|
|
|
|
```markdown
|
|
Usage: docker login [OPTIONS] [SERVER]
|
|
|
|
Log in to a Docker registry.
|
|
If no server is specified, the default is defined by the daemon.
|
|
|
|
Options:
|
|
--help Print usage
|
|
-p, --password string Password
|
|
-u, --username string Username
|
|
```
|
|
|
|
If you want to login to a self-hosted registry you can specify this by
|
|
adding the server name.
|
|
|
|
example:
|
|
$ docker login localhost:8080
|
|
|
|
|
|
`docker login` requires user to use `sudo` or be `root`, except when:
|
|
|
|
1. connecting to a remote daemon, such as a `docker-machine` provisioned `docker engine`.
|
|
2. user is added to the `docker` group. This will impact the security of your system; the `docker` group is `root` equivalent. See [Docker Daemon Attack Surface](https://docs.docker.com/security/security/#docker-daemon-attack-surface) for details.
|
|
|
|
You can log into any public or private repository for which you have
|
|
credentials. When you log in, the command stores encoded credentials in
|
|
`$HOME/.docker/config.json` on Linux or `%USERPROFILE%/.docker/config.json` on Windows.
|
|
|
|
## Credentials store
|
|
|
|
The Docker Engine can keep user credentials in an external credentials store,
|
|
such as the native keychain of the operating system. Using an external store
|
|
is more secure than storing credentials in the Docker configuration file.
|
|
|
|
To use a credentials store, you need an external helper program to interact
|
|
with a specific keychain or external store. Docker requires the helper
|
|
program to be in the client's host `$PATH`.
|
|
|
|
This is the list of currently available credentials helpers and where
|
|
you can download them from:
|
|
|
|
- D-Bus Secret Service: https://github.com/docker/docker-credential-helpers/releases
|
|
- Apple macOS keychain: https://github.com/docker/docker-credential-helpers/releases
|
|
- Microsoft Windows Credential Manager: https://github.com/docker/docker-credential-helpers/releases
|
|
|
|
### Usage
|
|
|
|
You need to specify the credentials store in `$HOME/.docker/config.json`
|
|
to tell the docker engine to use it:
|
|
|
|
```json
|
|
{
|
|
"credsStore": "osxkeychain"
|
|
}
|
|
```
|
|
|
|
If you are currently logged in, run `docker logout` to remove
|
|
the credentials from the file and run `docker login` again.
|
|
|
|
### Protocol
|
|
|
|
Credential helpers can be any program or script that follows a very simple protocol.
|
|
This protocol is heavily inspired by Git, but it differs in the information shared.
|
|
|
|
The helpers always use the first argument in the command to identify the action.
|
|
There are only three possible values for that argument: `store`, `get`, and `erase`.
|
|
|
|
The `store` command takes a JSON payload from the standard input. That payload carries
|
|
the server address, to identify the credential, the user name, and either a password
|
|
or an identity token.
|
|
|
|
```json
|
|
{
|
|
"ServerURL": "https://index.docker.io/v1",
|
|
"Username": "david",
|
|
"Secret": "passw0rd1"
|
|
}
|
|
```
|
|
|
|
If the secret being stored is an identity token, the Username should be set to
|
|
`<token>`.
|
|
|
|
The `store` command can write error messages to `STDOUT` that the docker engine
|
|
will show if there was an issue.
|
|
|
|
The `get` command takes a string payload from the standard input. That payload carries
|
|
the server address that the docker engine needs credentials for. This is
|
|
an example of that payload: `https://index.docker.io/v1`.
|
|
|
|
The `get` command writes a JSON payload to `STDOUT`. Docker reads the user name
|
|
and password from this payload:
|
|
|
|
```json
|
|
{
|
|
"Username": "david",
|
|
"Secret": "passw0rd1"
|
|
}
|
|
```
|
|
|
|
The `erase` command takes a string payload from `STDIN`. That payload carries
|
|
the server address that the docker engine wants to remove credentials for. This is
|
|
an example of that payload: `https://index.docker.io/v1`.
|
|
|
|
The `erase` command can write error messages to `STDOUT` that the docker engine
|
|
will show if there was an issue.
|