datahub/docs/authentication/guides/add-users.md

# Onboarding Users to DataHub

New user accounts can be provisioned on DataHub in 3 ways:

1. Shared Invite Links
2. Single Sign-On using [OpenID Connect](https://www.google.com/search?q=openid+connect&oq=openid+connect&aqs=chrome.0.0i131i433i512j0i512l4j69i60l2j69i61.1468j0j7&sourceid=chrome&ie=UTF-8) 
3. Static Credential Configuration File (Self-Hosted Only)

The first option is the easiest to get started with. The second is recommended for deploying DataHub in production. The third should
be reserved for special circumstances where access must be closely monitored and controlled, and is only relevant for Self-Hosted instances.

# Shared Invite Links

### Generating an Invite Link

If you have the `Manage User Credentials` [Platform Privilege](../../authorization/access-policies-guide.md), you can invite new users to DataHub by sharing an invite link.

To do so, navigate to the **Users & Groups** section inside of Settings page. Here you can generate a shareable invite link by clicking the `Invite Users` button. If you
do not have the correct privileges to invite users, this button will be disabled.

<p align="center">
  <img width="100%" src="https://raw.githubusercontent.com/datahub-project/datahub/master/docs/imgs/invite-users-button.png"/>
</p>

To invite new users, simply share the link with others inside your organization.

<p align="center">
  <img width="70%" src="https://raw.githubusercontent.com/datahub-project/datahub/master/docs/imgs/invite-users-popup.png"/>
</p>

When a new user visits the link, they will be directed to a sign up screen where they can create their DataHub account.

### Resetting User Passwords

To reset a user's password, navigate to the Users & Groups tab, find the user who needs their password reset,
and click **Reset user password** inside the menu dropdown on the right hand side. Note that a user must have the
`Manage User Credentials` [Platform Privilege](../../authorization/access-policies-guide.md) in order to reset passwords.

<p align="center">
  <img width="100%" src="https://raw.githubusercontent.com/datahub-project/datahub/master/docs/imgs/reset-user-password-button.png"/>
</p>

To reset the password, simply share the password reset link with the user who needs to change their password. Password reset links expire after 24 hours.

<p align="center">
  <img width="70%" src="https://raw.githubusercontent.com/datahub-project/datahub/master/docs/imgs/reset-user-password-popup.png"/>
</p>


# Configuring Single Sign-On with OpenID Connect

Setting up Single Sign-On via OpenID Connect enables your organization's users to login to DataHub via a central Identity Provider such as

- Azure AD
- Okta
- Keycloak
- Ping!
- Google Identity

and many more.

This option is strongly recommended for production deployments of DataHub. 

### Managed DataHub

Single Sign-On can be configured and enabled by navigating to **Settings** > **SSO** > **OIDC**. Note
that a user must have the **Manage Platform Settings** [Platform Privilege](../../authorization/access-policies-guide.md) 
in order to configure SSO settings. 

To complete the integration, you'll need the following:

1. **Client ID** - A unique identifier for your application with the identity provider
2. **Client Secret** - A shared secret to use for exchange between you and your identity provider
3. **Discovery URL** - A URL where the OpenID settings for your identity provider can be discovered.

These values can be obtained from your Identity Provider by following Step 1 on the [OpenID Connect Authentication](sso/configure-oidc-react.md)) Guide. 

### Self-Hosted DataHub

For information about configuring Self-Hosted DataHub to use OpenID Connect (OIDC) to
perform authentication, check out [OIDC Authentication](sso/configure-oidc-react.md).

> **A note about user URNs**: User URNs are unique identifiers for users on DataHub. The username received from an Identity Provider
> when a user logs into DataHub via OIDC is used to construct a unique identifier for the user on DataHub. The urn is computed as:
> `urn:li:corpuser:<extracted-username>`
>
> By default, the email address will be the username extracted from the Identity Provider. For information about customizing
> the claim should be treated as the username in Datahub, check out the [OIDC Authentication](sso/configure-oidc-react.md) documentation.

# Static Credential Configuration File (Self-Hosted Only)

User credentials can be managed via a [JaaS Authentication](./jaas.md) configuration file containing
static username and password combinations. By default, the credentials for the root 'datahub' users are configured
using this mechanism. It is highly recommended that admins change or remove the default credentials for this user

## Adding new users using a user.props file

To define a set of username / password combinations that should be allowed to log in to DataHub (in addition to the root 'datahub' user),
create a new file called `user.props` at the file path `${HOME}/.datahub/plugins/frontend/auth/user.props` within the `datahub-frontend-react` container
or pod.

This file should contain username:password specifications, with one on each line. For example, to create 2 new users,
with usernames "janesmith" and "johndoe", we would define the following file:

```
// custom user.props
janesmith:janespassword
johndoe:johnspassword
```

Once you've saved the file, simply start the DataHub containers & navigate to `http://localhost:9002/login`
to verify that your new credentials work.

To change or remove existing login credentials, edit and save the `user.props` file. Then restart DataHub containers. 

If you want to customize the location of the `user.props` file, or if you're deploying DataHub via Helm, proceed to Step 2.

### (Advanced) Mount custom user.props file to container

This step is only required when mounting custom credentials into a Kubernetes pod (e.g. Helm) **or** if you want to change
the default filesystem location from which DataHub mounts a custom `user.props` file (`${HOME}/.datahub/plugins/frontend/auth/user.props)`. 

If you are deploying with `datahub docker quickstart`, or running using Docker Compose, you can most likely skip this step.

#### Docker Compose

You'll need to modify the `docker-compose.yml` file to mount a container volume mapping your custom user.props to the standard location inside the container 
(`/etc/datahub/plugins/frontend/auth/user.props`).

For example, to mount a user.props file that is stored on my local filesystem at `/tmp/datahub/user.props`, we'd modify the YAML for the 
`datahub-web-react` config to look like the following:

```aidl
  datahub-frontend-react:
    build:
      context: ../
      dockerfile: docker/datahub-frontend/Dockerfile
    image: linkedin/datahub-frontend-react:${DATAHUB_VERSION:-head}
    .....
    # The new stuff
    volumes:
      - ${HOME}/.datahub/plugins:/etc/datahub/plugins
      - /tmp/datahub:/etc/datahub/plugins/frontend/auth
```

Once you've made this change, restarting DataHub enable authentication for the configured users.

#### Helm

You'll need to create a Kubernetes secret, then mount the file as a volume to the `datahub-frontend` pod. 

First, create a secret from your local `user.props` file

```shell
kubectl create secret generic datahub-users-secret --from-file=user.props=./<path-to-your-user.props>
```

Then, configure your `values.yaml` to add the volume to the `datahub-frontend` container.

```YAML
datahub-frontend:
  ...
  extraVolumes:
    - name: datahub-users
      secret:
        defaultMode: 0444
        secretName:  datahub-users-secret
  extraVolumeMounts:
    - name: datahub-users
      mountPath: /etc/datahub/plugins/frontend/auth/user.props
      subPath: user.props
```

Note that if you update the secret you will need to restart the `datahub-frontend` pods so the changes are reflected. To update the secret in-place you can run something like this.

```shell
kubectl create secret generic datahub-users-secret --from-file=user.props=./<path-to-your-user.props> -o yaml --dry-run=client | kubectl apply -f -
```

> A note on user URNs: User URNs are unique identifiers for users of DataHub. The usernames defined in the `user.props` file will be used to generate the DataHub user "urn", which uniquely identifies
> the user on DataHub. The urn is computed as `urn:li:corpuser:{username}`, where "username is defined inside your user.props file."

## Changing the default 'datahub' user credentials (Recommended)

The 'datahub' root user is created for you by default. This user is controlled via a user.props file which [JaaS Authentication](./jaas.md) is configured to use:

By default, the credential file looks like this for each and every self-hosted DataHub deployment: 

```
// default user.props
datahub:datahub
```

Obviously, this is not ideal from a security perspective. It is highly recommended that this file
is changed *prior* to deploying DataHub to production at your organization.

To change the default password for this user, or remove it altogether:

1. **Create a new config file**: Create a new version of `user.props` which defines the updated password for the datahub user.
To remove this user, simply omit the username 'datahub' from the new file. For example, to change the
password for the DataHub root user to 'newpassword', your file would contain the following:

   ```
   // new user.props
   datahub:newpassword
   ```

2. **Mount the updated config file**: Change the `docker-compose.yaml` to mount an updated user.props file to the following location inside the `datahub-frontend-react` container using a volume:
   `/datahub-frontend/conf/user.props`

2. **Restart DataHub**: Restart the DataHub containers or pods to pick up the new configs


If you're deploying using the CLI quickstart, you can simply download a copy of the [docker-compose file used in quickstart](https://github.com/datahub-project/datahub/blob/master/docker/quickstart/docker-compose.quickstart.yml),
and modify the `datahub-frontend-react` block to contain the extra volume mount. Then run

```
datahub docker quickstart —quickstart-compose-file <your-modified-compose>.yml
```


## Caveats

### Adding User Details

If you add a new username / password to the `user.props` file, no other information about the user will exist
about the user in DataHub (full name, email, bio, etc). This means that you will not be able to search to find the user.

In order for the user to become searchable, simply navigate to the new user's profile page (top-right corner) and click
**Edit Profile**. Add some details like a display name, an email, and more. Then click **Save**. Now you should be able
to find the user via search.

> You can also use our Python Emitter SDK to produce custom information about the new user via the CorpUser metadata entity.

For a more comprehensive overview of how users & groups are managed within DataHub, check out [this video](https://www.youtube.com/watch?v=8Osw6p9vDYY).


## FAQ

1. Can I enable OIDC and username / password (JaaS) authentication at the same time? 

YES! If you have not explicitly disabled JaaS via an environment variable on the datahub-frontend container (AUTH_JAAS_ENABLED),
then you can always access the standard login flow at `http://your-datahub-url.com/login`. 

## Feedback / Questions / Concerns

We want to hear from you! For any inquiries, including Feedback, Questions, or Concerns, reach out on Slack!