Nginx reads file from multiple locations - nginx

Question

Pardon me, I'm new to nginx, if the question is vague, please point me to some directions.
I have an image xyz.jpg in Disk-1, and an image abc.jpg in Disk-2, when I call url:../image/xyz.jpg, the xyz.jpg (Disk-1) shows up by using alias in my nginx's file . Question is:
Is there any way to call ../image/abc.jpg, the abc.jpg (Disk-2) will show up ?
location /image/ {
expires max;
add_header Pragma public;
add_header Cache-Control "public";
alias /image_data/;
}
Edit: I used try_files but it didn't work
location #image2 {
alias /image_data_2/;
try_files $uri $uri/ =404
}
location /image/ {
expires max;
add_header Pragma public;
add_header Cache-Control "public";
alias /image_data/;
try_files $uri $uri/ #image2;
}

Answer 1

So you want to check two folders for images to match URIs beginning with /image/.
You could use a regular expression location block to capture the part of the URI following the prefix, which avoids using the alias directive. The regular expression locations are evaluated in order, so the placement of the block within the server block is significant. See this document for details.
Within the protection of the location block, the root is set to a common parent directory (in this case /) and construct the path to the files using try_files terms.
For example:
location ~ ^/image/(.*)$ {
expires max;
add_header Pragma public;
add_header Cache-Control "public";
root /;
try_files /image_date/$1 /image_data_2/$1 =404;
}
See this document for details.