Nginx proxy_pass root and specific url only

Question

Working on a new version of an existing web app, I need nginx to forward root (/) and multiple specific URI to be forwarded to the v2 infrastructure (with proxy_pass) while not specified URI must be forwarded to v1.

location = /specific_uri1 proxy_pass http://v2.webapp.com; proxy_set_header Host v2-test.webapp.com; add_header X-version v2; add_header X-node $hostname; } location = /specific_uri2 proxy_pass http://v2.webapp.com; proxy_set_header Host v2-test.webapp.com; add_header X-version v2; add_header X-node $hostname; } location / { proxy_pass http://v2.webapp.com; proxy_set_header Host v2-test.webapp.com; add_header X-version v2; add_header X-node $hostname; } location /(.*)$ { proxy_pass http://v1.webapp.com; proxy_set_header Host v1-test.webapp.com; add_header X-version v1; add_header X-node $hostname; } 

The last location directive is never matched so everything not declared still fall to the v2 web app. I surely have a misunderstanding of the way nginx process the directives.

I have tested many configurations none of them working for my case.

Thank you.

UPDATE:

I have updated my configuration with the following block :

location ~* /specific_uri1/ { proxy_pass http://v2.webapp.com:8008; proxy_set_header Host v2-test.webapp.com; add_header X-version v2; add_header X-node $hostname; } location = / { proxy_pass http://v2.webapp.com:8008; proxy_set_header Host v2-test.webapp.com; add_header X-version v2; add_header X-node $hostname; } location / { proxy_set_header Host v1.webapp.com; proxy_pass http://v1-test.webapp.com; add_header X-version v1; add_header X-node $hostname; } 

All requested URI are forwarded to the correct version, but, assets from /specific_uri1 and from / (root) are fetch from v1 (instead of v2), resulting http 404 errors. My assets are loaded from URI like /js/main.js?v=0.9.0-sprint14 so I guess the last location block is match for them. Since both versions of my app use the same folder tree I can't specify /js or /img location. What would be the right way to handle this ?

Answer 1

location / matches any location - if you want to match only /, you should use location = /. See this document for details.

Also, your regular expression location is missing the ~ or ~* operator. But the last location block in your question should be location /.

You might simplify the configuration by using a single regular expression:

location ~* ^/(|specific_uri1|specific_uri2)$ { proxy_pass http://v2.webapp.com; proxy_set_header Host v2-test.webapp.com; add_header X-version v2; add_header X-node $hostname; } location / { proxy_pass http://v1.webapp.com; proxy_set_header Host v1-test.webapp.com; add_header X-version v1; add_header X-node $hostname; }