Running Airflow behind a reverse proxy¶

Airflow can be set up behind a reverse proxy, with the ability to set its endpoint with great flexibility.

For example, you can configure your reverse proxy to get:

https://lab.mycompany.com/myorg/airflow/

To do so, you need to set the following setting in your airflow.cfg:

base_url = http://my_host/myorg/airflow

Additionally if you use Celery Executor, you can get Flower in /myorg/flower with:

flower_url_prefix = /myorg/flower

Your reverse proxy (ex: nginx) should be configured as follow:

pass the url and http header as it for the Airflow webserver, without any rewrite, for example:

server {
  listen 80;
  server_name lab.mycompany.com;

  location /myorg/airflow/ {
      proxy_pass http://localhost:8080;
      proxy_set_header Host $http_host;
      proxy_redirect off;
      proxy_http_version 1.1;
      proxy_set_header Upgrade $http_upgrade;
      proxy_set_header Connection "upgrade";
  }
}

rewrite the url for the flower endpoint:

server {
    listen 80;
    server_name lab.mycompany.com;

    location /myorg/flower/ {
        rewrite ^/myorg/flower/(.*)$ /$1 break;  # remove prefix from http header
        proxy_pass http://localhost:5555;
        proxy_set_header Host $http_host;
        proxy_redirect off;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";
    }
}

To ensure that Airflow generates URLs with the correct scheme when running behind a TLS-terminating proxy, you should configure the proxy to set the X-Forwarded-Proto header, and enable the ProxyFix middleware in your airflow.cfg:

[webserver]
enable_proxy_fix = True

If you need to configure the individual parameters to the ProxyFix middleware, you can set them individually in your airflow.cfg:

[webserver]
proxy_fix_x_for = 1
proxy_fix_x_host = 3

Note

You should only enable the ProxyFix middleware when running Airflow behind a trusted proxy (AWS ELB, nginx, etc.).