To create a new application for the instance, click on the "Admin Area" link in the menu bar and then select "Applications" in the sidebar. In production environments, it is recommended to create an "Instance" or "Group" application. If you are following the steps in this tutorial, but do not have administrative access to a GitLab instance, instructions for creating a "User" application are included. It's possible to restrict access to an application by also creating a "Group" application instance. In this article we will be using an "instance wide application" that is available to all users of GitLab and then inspecting which GitLab groups the user is a member of from Airflow. GitLab supports creating applications that are specific to a user, members of a particular group, or to all users. The first step in configuring GitLab as an SSO provider is to create an "application" that will be used by Airflow to request a user's credentials. Step 1: Configure a GitLab OpenID Application Create a Docker Compose "orchestration" file that allows for the Docker image and SSO configuration to be tested.Create a secrets file that provides Airflow the application configuration from GitLab and the URLs need for authentication, retrieving user data, and for notifying the IdP that a user has logged out.Implement a security manager that supports OIDC.Build a Dockerfile which can package Airflow and the dependencies required by OpenID Connect (OIDC).Create a directory to organize the files required by Airflow for SSO.Creating an application within GitLab creates a "trust" between the two systems that is verified using a special "ID" and token prevents attackers from being able to steal credentials that would allow them access to Airflow. Create and configure an "application" in GitLab which registers Airflow as a system authorized to use GitLab as an IdP.Here are the steps we will follow to implement SSO: Because it is often desirable to limit access to a subset of users within an IdP, we will show how GitLab groups can further be leveraged as a way of allowing members of only one group to access the AirFlow instance. This article focuses on the OpenID method of authentication (specifically the OpenID Connect) using GitLab as an IdP. This makes it ideal for use by intranet sites or when the web server is configured to use the Kerberos Authentication Protocol. REMOTE_USER: relies on the environment variable REMOTE_USER on the web server, and checks whether it has been authorized within the framework users table, placing responsibility on the web server to authenticate the user.LDAP: user information and credentials are stored on a central server (such as Microsoft Active directory) and authentication requests are forwarded to the server for verification.The credentials are not shared with Airflow directly. The identity provider verifies the account credentials and redirects the user back to the original application along with a special code (called a token) indicating that they were authenticated correctly. Many popular online services providers such as Google, Microsoft, and GitHub run identity servers compatible with OpenID. OpenID: credentials are stored on a remote server called an identity provider, to which Airflow directs the user during login.It supports the following types of remote authentication: AppBuilder is a framework that handles many of the common challenges of creating websites, including workflows needed for admin scaffolding and security. Under the hood, Airflow uses Flask-AppBuilder for managing authentication and administrative permissions. We'll review the underlying system Airflow uses to provide its security (Flask-AppBuilder), the steps needed to provision an "application" within GitLab, how to configure AirFlow to work with GitLab as an OpenID IdP, and how the application can be deployed using Docker. In this blog post, we will look at how to enable SSO for Apache AirFlow using GitLab as an Identity Provider (IdP). Centralized user management gives organizations better control over who has access to important systems and helps to lower the threat of data breaches by providing a central location for monitoring systems access and credential management. Many organizations use technologies like Single Sign-On (SSO), Active Directory, and LDAP to help centralize user management and systems access. Because AirFlow is often used to work with data containing sensitive information, ensuring it is securely configured and only authorized users are able to access the dashboard and APIs is an important part of its deployment. Apache Airflow is an open source workflow manager used for working with creating, scheduling, and monitoring workflows and has become an important tool for data engineering.
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