160 lines
5.5 KiB
Markdown
160 lines
5.5 KiB
Markdown
# Okta SSO provider
|
|
|
|
Okta is a [Single Sign-on provider][okta-sso] that can be used to authenticate
|
|
with GitLab.
|
|
|
|
The following documentation enables Okta as a SAML provider.
|
|
|
|
## Configure the Okta application
|
|
|
|
1. On Okta go to the admin section and choose to **Add an App**.
|
|
1. When the app screen comes up you see another button to **Create an App** and
|
|
choose SAML 2.0 on the next screen.
|
|
1. Now, very important, add a logo
|
|
(you can choose it from <https://about.gitlab.com/press/>). You'll have to
|
|
crop and resize it.
|
|
1. Next, you'll need the to fill in the SAML general config. Here's an example
|
|
image.
|
|
|
|
|
|
|
|
1. The last part of the configuration is the feedback section where you can
|
|
just say you're a customer and creating an app for internal use.
|
|
1. When you have your app you'll have a few tabs on the top of the app's
|
|
profile. Click on the SAML 2.0 config instructions button which should
|
|
look like the following:
|
|
|
|
|
|
|
|
1. On the screen that comes up take note of the
|
|
**Identity Provider Single Sign-On URL** which you'll use for the
|
|
`idp_sso_target_url` on your GitLab config file.
|
|
|
|
1. **Before you leave Okta make sure you add your user and groups if any.**
|
|
|
|
---
|
|
|
|
Now that the Okta app is configured, it's time to enable it in GitLab.
|
|
|
|
## Configure GitLab
|
|
|
|
1. On your GitLab server, open the configuration file:
|
|
|
|
**For Omnibus GitLab installations**
|
|
|
|
```sh
|
|
sudo editor /etc/gitlab/gitlab.rb
|
|
```
|
|
|
|
**For installations from source**
|
|
|
|
```sh
|
|
cd /home/git/gitlab
|
|
sudo -u git -H editor config/gitlab.yml
|
|
```
|
|
|
|
1. See [Initial OmniAuth Configuration](../../integration/omniauth.md#initial-omniauth-configuration)
|
|
for initial settings.
|
|
|
|
1. To allow your users to use Okta to sign up without having to manually create
|
|
an account first, don't forget to add the following values to your
|
|
configuration:
|
|
|
|
**For Omnibus GitLab installations**
|
|
|
|
```ruby
|
|
gitlab_rails['omniauth_allow_single_sign_on'] = ['saml']
|
|
gitlab_rails['omniauth_block_auto_created_users'] = false
|
|
```
|
|
|
|
**For installations from source**
|
|
|
|
```yaml
|
|
allow_single_sign_on: ["saml"]
|
|
block_auto_created_users: false
|
|
```
|
|
|
|
1. You can also automatically link Okta users with existing GitLab users if
|
|
their email addresses match by adding the following setting:
|
|
|
|
**For Omnibus GitLab installations**
|
|
|
|
```ruby
|
|
gitlab_rails['omniauth_auto_link_saml_user'] = true
|
|
```
|
|
|
|
**For installations from source**
|
|
|
|
```yaml
|
|
auto_link_saml_user: true
|
|
```
|
|
|
|
1. Add the provider configuration.
|
|
|
|
>**Notes:**
|
|
>- Change the value for `assertion_consumer_service_url` to match the HTTPS endpoint
|
|
of GitLab (append `users/auth/saml/callback` to the HTTPS URL of your GitLab
|
|
installation to generate the correct value).
|
|
>- To get the `idp_cert_fingerprint` fingerprint, first download the
|
|
certificate from the Okta app you registered and then run:
|
|
`openssl x509 -in okta.cert -noout -fingerprint`. Substitute `okta.cert`
|
|
with the location of your certificate.
|
|
>- Change the value of `idp_sso_target_url`, with the value of the
|
|
**Identity Provider Single Sign-On URL** from the step when you
|
|
configured the Okta app.
|
|
>- Change the value of `issuer` to a unique name, which will identify the application
|
|
to the IdP.
|
|
>- Leave `name_identifier_format` as-is.
|
|
|
|
**For Omnibus GitLab installations**
|
|
|
|
```ruby
|
|
gitlab_rails['omniauth_providers'] = [
|
|
{
|
|
name: 'saml',
|
|
args: {
|
|
assertion_consumer_service_url: 'https://gitlab.example.com/users/auth/saml/callback',
|
|
idp_cert_fingerprint: '43:51:43:a1:b5:fc:8b:b7:0a:3a:a9:b1:0f:66:73:a8',
|
|
idp_sso_target_url: 'https://gitlab.oktapreview.com/app/gitlabdev773716_gitlabsaml_1/exk8odl81tBrjpD4B0h7/sso/saml',
|
|
issuer: 'https://gitlab.example.com',
|
|
name_identifier_format: 'urn:oasis:names:tc:SAML:2.0:nameid-format:transient'
|
|
},
|
|
label: 'Okta' # optional label for SAML login button, defaults to "Saml"
|
|
}
|
|
]
|
|
```
|
|
|
|
**For installations from source**
|
|
|
|
```yaml
|
|
- {
|
|
name: 'saml',
|
|
args: {
|
|
assertion_consumer_service_url: 'https://gitlab.example.com/users/auth/saml/callback',
|
|
idp_cert_fingerprint: '43:51:43:a1:b5:fc:8b:b7:0a:3a:a9:b1:0f:66:73:a8',
|
|
idp_sso_target_url: 'https://gitlab.oktapreview.com/app/gitlabdev773716_gitlabsaml_1/exk8odl81tBrjpD4B0h7/sso/saml',
|
|
issuer: 'https://gitlab.example.com',
|
|
name_identifier_format: 'urn:oasis:names:tc:SAML:2.0:nameid-format:transient'
|
|
},
|
|
label: 'Okta' # optional label for SAML login button, defaults to "Saml"
|
|
}
|
|
```
|
|
|
|
|
|
1. [Reconfigure][reconf] or [restart] GitLab for Omnibus and installations
|
|
from source respectively for the changes to take effect.
|
|
|
|
You might want to try this out on an incognito browser window.
|
|
|
|
## Configuring groups
|
|
|
|
>**Note:**
|
|
Make sure the groups exist and are assigned to the Okta app.
|
|
|
|
You can take a look of the [SAML documentation][saml] on external groups since
|
|
it works the same.
|
|
|
|
[okta-sso]: https://www.okta.com/products/single-sign-on/
|
|
[saml]: ../../integration/saml.md#external-groups
|
|
[reconf]: ../restart_gitlab.md#omnibus-gitlab-reconfigure
|
|
[restart]: ../restart_gitlab.md#installations-from-source
|