1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
|
# Integrate your GitLab instance with GitHub
You can integrate your GitLab instance with GitHub.com as well as GitHub Enterprise to enable users to import projects from GitHub and/or to login to your GitLab instance with your GitHub account.
## Enabling GitHub OAuth
To enable GitHub OmniAuth provider, you must use GitHub's credentials for your GitLab instance.
To get the credentials (a pair of Client ID and Client Secret), you must register an application as an OAuth App on GitHub.
1. Sign in to GitHub.
1. Navigate to your individual user or organization settings, depending on how you want the application registered. It does not matter if the application is registered as an individual or an organization - that is entirely up to you.
- For individual accounts, select **Developer settings** from the left menu, then select **OAuth Apps**.
- For organization accounts, directly select **OAuth Apps** from the left menu.
1. Select **Register an application** (if you don't have any OAuth App) or **New OAuth App** (if you already have OAuth Apps).
1. Provide the required details.
- Application name: This can be anything. Consider something like `<Organization>'s GitLab` or `<Your Name>'s GitLab` or something else descriptive.
- Homepage URL: The URL of your GitLab installation. For example, `https://gitlab.example.com`.
- Application description: Fill this in if you wish.
- Authorization callback URL: `http(s)://${YOUR_DOMAIN}/users/auth`. Please make sure the port is included if your GitLab instance is not configured on default port.
NOTE: Be sure to append `/users/auth` to the end of the callback URL
to prevent a [OAuth2 convert
redirect](http://tetraph.com/covert_redirect/) vulnerability.
1. Select **Register application**.
1. You should now see a pair of **Client ID** and **Client Secret** near the top right of the page (see screenshot).
Keep this page open as you continue configuration.
1. On your GitLab server, open the configuration file.
For Omnibus package:
```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](omniauth.md#initial-omniauth-configuration) for initial settings.
1. Add the provider configuration:
For Omnibus package:
For GitHub.com:
```ruby
gitlab_rails['omniauth_providers'] = [
{
"name" => "github",
"app_id" => "YOUR_APP_ID",
"app_secret" => "YOUR_APP_SECRET",
"args" => { "scope" => "user:email" }
}
]
```
For GitHub Enterprise:
```ruby
gitlab_rails['omniauth_providers'] = [
{
"name" => "github",
"app_id" => "YOUR_APP_ID",
"app_secret" => "YOUR_APP_SECRET",
"url" => "https://github.example.com/",
"args" => { "scope" => "user:email" }
}
]
```
For installation from source:
For GitHub.com:
```
- { name: 'github', app_id: 'YOUR_APP_ID',
app_secret: 'YOUR_APP_SECRET',
args: { scope: 'user:email' } }
```
For GitHub Enterprise:
```
- { name: 'github', app_id: 'YOUR_APP_ID',
app_secret: 'YOUR_APP_SECRET',
url: "https://github.example.com/",
args: { scope: 'user:email' } }
```
__Replace `https://github.example.com/` with your GitHub URL.__
1. Change `YOUR_APP_ID` to the Client ID from the GitHub application page from step 6.
1. Change `YOUR_APP_SECRET` to the Client Secret from the GitHub application page from step 6.
1. Save the configuration file.
1. [Reconfigure GitLab][] or [restart GitLab][] for the changes to take effect if you
installed GitLab via Omnibus or from source respectively.
On the sign in page there should now be a GitHub icon below the regular sign in form.
Click the icon to begin the authentication process. GitHub will ask the user to sign in and authorize the GitLab application.
If everything goes well the user will be returned to GitLab and will be signed in.
## GitHub Enterprise with self-signed Certificate
If you are attempting to import projects from GitHub Enterprise with a self-signed
certificate and the imports are failing, you will need to disable SSL verification.
It should be disabled by adding `verify_ssl` to `false` in the provider configuration
and changing the global Git `sslVerify` option to `false` in the GitLab server.
For Omnibus package:
```ruby
gitlab_rails['omniauth_providers'] = [
{
"name" => "github",
"app_id" => "YOUR_APP_ID",
"app_secret" => "YOUR_APP_SECRET",
"url" => "https://github.example.com/",
"verify_ssl" => false,
"args" => { "scope" => "user:email" }
}
]
```
You will also need to disable Git SSL verification on the server hosting GitLab.
```ruby
omnibus_gitconfig['system'] = { "http" => ["sslVerify = false"] }
```
For installation from source:
```
- { name: 'github', app_id: 'YOUR_APP_ID',
app_secret: 'YOUR_APP_SECRET',
url: "https://github.example.com/",
verify_ssl: false,
args: { scope: 'user:email' } }
```
You will also need to disable Git SSL verification on the server hosting GitLab.
```
git config --global http.sslVerify false
```
For the changes to take effect, [reconfigure GitLab] if you installed
via Omnibus, or [restart GitLab] if you installed from source.
[reconfigure GitLab]: ../administration/restart_gitlab.md#omnibus-gitlab-reconfigure
[restart GitLab]: ../administration/restart_gitlab.md#installations-from-source
|
