jenkins gitlab crumb

Jenkins GitLab crumb is a security feature used to prevent cross-site request forgery (CSRF) attacks when integrating Jenkins with GitLab. CSRF attacks occur when an attacker tricks a user's browser into making a malicious request on their behalf.

To use Jenkins with GitLab, you need to obtain a crumb token from GitLab, which is then used in subsequent requests to Jenkins. This token acts as a proof of authenticity and ensures that the request is coming from a trusted source.

To obtain the crumb token, you can use the following command:

curl -u <gitlab_username>:<gitlab_password> -X GET "https://<gitlab_instance>/crumbIssuer/api/json"

Replace `<gitlab_username>`, `<gitlab_password>`, and `<gitlab_instance>` with your GitLab credentials and instance URL respectively. This command will return a JSON response containing the crumb token.

You can then use this crumb token in your Jenkins pipeline or job configurations to authenticate requests made to GitLab APIs.

Note: It is important to keep your GitLab credentials secure and avoid exposing them in plain text.