Set up a URL redirect for a classic Application Load Balancer

Console

1. Go to your list of load balancers in the Google Cloud console.
   Go to Load balancing
2. For a load balancer of type HTTP(S) (Classic), click the load balancer's name link.
3. Click Edit edit.
4. In Host and path rules, select Advanced host and path rule (URL redirect, URL rewrite).
5. Click Add host and path rule.
6. In the Hosts field, enter *.
7. Click edit.
8. For the Action, select Redirect the client to different host/path.
9. For the host redirect, enter a hostname to redirect to, or omit to keep the requested host.
10. For Path redirect, select Full path redirect.
11. For Path value, enter a path to redirect to, or omit to keep the requested path.
12. For Strip query, click Enable.
13. Click Save to finish configuring the host and path rule.
14. Click Done to finish editing the URL map.
15. Click Update to finish editing the load balancer.

gcloud

The following example returns a configurable 3xx response code, sets the Location response header with the appropriate URI, and replaces the host and path as specified in the redirect action.

1. Export the existing URL map using the gcloud compute url-maps export command:

   gcloud compute url-maps export web-map-http \
     --destination=lb-map-config.yaml \
     --global
   

2. Update the URL map file lb-map-config.yaml by adding this to the end of the file:

   hostRules:
   - hosts:
     - '*'
     pathMatcher: path-matcher-1
   name: web-map-http
   pathMatchers:
   - defaultUrlRedirect:
       hostRedirect: NEW_HOSTNAME # Omit to keep the requested host
       httpsRedirect: false
       pathRedirect: /NEW_PATH # Omit to keep the requested path
       redirectResponseCode: MOVED_PERMANENTLY_DEFAULT
       stripQuery: true
     name: path-matcher-1
   

3. Update the URL map using the gcloud compute url-maps import command:

   gcloud compute url-maps import web-map-http \
      --global \
      --source=lb-map-config.yaml