debian-mirror-gitlab/doc/integration/google.md

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---
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stage: Ecosystem
group: Integrations
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info: To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/engineering/ux/technical-writing/#assignments
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---
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# Google OAuth 2.0 OmniAuth Provider **(FREE SELF)**
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To enable the Google OAuth 2.0 OmniAuth provider you must register your application
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with Google. Google generates a client ID and secret key for you to use.
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## Enable Google OAuth
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In Google's side:
1. Navigate to the [cloud resource manager](https://console.cloud.google.com/cloud-resource-manager) page
1. Select **Create Project**
1. Provide the project information:
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- **Project name** - "GitLab" works just fine here.
- **Project ID** - Must be unique to all Google Developer registered applications.
Google provides a randomly generated Project ID by default. You can use
the randomly generated ID or choose a new one.
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1. Refresh the page and you should see your new project in the list
1. Go to the [Google API Console](https://console.developers.google.com/apis/dashboard)
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1. Select the previously created project in the upper left corner
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1. Select **Credentials** from the sidebar
1. Select **OAuth consent screen** and fill the form with the required information
1. In the **Credentials** tab, select **Create credentials > OAuth client ID**
1. Fill in the required information
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- **Application type** - Choose "Web Application"
- **Name** - Use the default one or provide your own
- **Authorized JavaScript origins** -This isn't really used by GitLab but go
ahead and put `https://gitlab.example.com`
- **Authorized redirect URIs** - Enter your domain name followed by the
callback URIs one at a time:
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```plaintext
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https://gitlab.example.com/users/auth/google_oauth2/callback
https://gitlab.example.com/-/google_api/auth/callback
```
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1. You should now be able to see a Client ID and Client secret. Note them down
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or keep this page open as you need them later.
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1. To enable projects to access [Google Kubernetes Engine](../user/infrastructure/clusters/index.md), you must also
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enable these APIs:
- Google Kubernetes Engine API
- Cloud Resource Manager API
- Cloud Billing API
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To do so you should:
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1. Go to the [Google API Console](https://console.developers.google.com/apis/dashboard).
1. Click on **ENABLE APIS AND SERVICES** button at the top of the page.
1. Find each of the above APIs. On the page for the API, press the **ENABLE** button.
It may take a few minutes for the API to be fully functional.
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On your GitLab server:
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1. Open the configuration file.
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For Omnibus GitLab:
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```shell
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sudo editor /etc/gitlab/gitlab.rb
```
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For installations from source:
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```shell
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cd /home/git/gitlab
sudo -u git -H editor config/gitlab.yml
```
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1. See [Configure initial settings](omniauth.md#configure-initial-settings) for initial settings.
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1. Add the provider configuration:
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For Omnibus GitLab:
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```ruby
gitlab_rails['omniauth_providers'] = [
{
"name" => "google_oauth2",
"app_id" => "YOUR_APP_ID",
"app_secret" => "YOUR_APP_SECRET",
"args" => { "access_type" => "offline", "approval_prompt" => '' }
}
]
```
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For installations from source:
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```yaml
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- { name: 'google_oauth2',
app_id: 'YOUR_APP_ID',
app_secret: 'YOUR_APP_SECRET',
args: { access_type: 'offline', approval_prompt: '' } }
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```
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1. Change `YOUR_APP_ID` to the client ID from the Google Developer page
1. Similarly, change `YOUR_APP_SECRET` to the client secret
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1. Make sure that you configure GitLab to use a fully-qualified domain name, as
Google doesn't accept raw IP addresses.
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For Omnibus packages:
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```ruby
external_url 'https://gitlab.example.com'
```
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For installations from source:
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```yaml
gitlab:
host: https://gitlab.example.com
```
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1. Save the configuration file.
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1. [Reconfigure](../administration/restart_gitlab.md#omnibus-gitlab-reconfigure)
or [restart GitLab](../administration/restart_gitlab.md#installations-from-source) for
the changes to take effect if you installed GitLab via Omnibus or from source
respectively.
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On the sign in page there should now be a Google icon below the regular sign in
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form. Click the icon to begin the authentication process. Google asks the
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user to sign in and authorize the GitLab application. If everything goes well
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the user is returned to GitLab and is signed in.