Ngnix + Nginx-GridFS-Replicaset(mongodb) + nginx-image-filter +nginx-proxy-cache Sample Configuration

gistfile1.txt

user www-data;

#worker_processes 4;
#worker_priority 0;
#worker_cpu_affinity 0001 0010 0100 1000;
#worker_rlimit_nofile 163840;

#worker_processes 8;
#worker_priority 0;
#worker_cpu_affinity 00000001 00000010 00000100 00001000 00010000 00100000 01000000 10000000;
#worker_rlimit_nofile 163840;

#worker_processes 2;
#worker_priority 0;
#worker_cpu_affinity    01 10;
#worker_rlimit_nofile 163840;

pid /var/run/nginx.pid;
events {
    worker_connections  40960;
    use epoll;
}

http {
    include mime.types;
    default_type  application/octet-stream;
    sendfile off;
    tcp_nopush off;
    keepalive_timeout  10;
    tcp_nodelay on;
    proxy_max_temp_file_size 100m;
    proxy_cache_path /var/lib/nginx/ramdisk/cache levels=1:2 keys_zone=cache-space:64m max_size=1000m inactive=90m;
    proxy_temp_path  /var/lib/nginx/ramdisk/tmp;
    client_body_temp_path /var/lib/nginx/ramdisk/client_tmp 1 2;
}

#server_names_hash_bucket_size 128;
server {

    listen 80;

    server_name origin.hostname.com;

    gzip            on;
    gzip_proxied     any;
    gzip_http_version 1.1;
    gzip_min_length  10;
    gzip_buffers 16 8k;
    gzip_comp_level 4;
    gzip_disable  msie6;
    gzip_types image/png image/gif image/jpeg;
    gzip_vary       on;

    proxy_intercept_errors on;
    proxy_pass_header Server;
    proxy_set_header Host $http_host;
    proxy_set_header X-Forwarded-Protocol https;
    proxy_set_header X-Real-IP $remote_addr;
    proxy_set_header X-Scheme $scheme;
    proxy_set_header  X-Forwarded-For $proxy_add_x_forwarded_for;

    location ~ ^/image {
        access_log  off;
        expires 3h; // tell expires to cloudfront 
        proxy_cache cache-space;
        proxy_cache_valid 200 302 60m;
        proxy_cache_valid 400 401 402 403 404 415 502 503 504 1m;
        proxy_cache_key $uri;
        proxy_pass http://localhost:8080;
        error_page 400 401 402 403 404 415 502 503 504 = @noimg;
    }

    location @noimg {
        access_log  off;
        rewrite ^ http://snapdi.sh/img/notfound.png break;
    }

}

server {

    listen 8080;
    server_name localhost;
    location ~ ^/image/dish/([a-f0-9]+)/crop/([0-9][0-9][0-9])$ {
        access_log  off;
        image_filter crop $2 $2;
        image_filter_jpeg_quality 95;
        proxy_pass http://localhost:8088;
        error_page 400 401 402 403 404 415 502 503 504 = @noimg;
    }

    location ~ ^/image/user/([a-f0-9]+)/crop/([0-9][0-9][0-9])$ {
        access_log  off;
        image_filter crop $2 $2;
        image_filter_jpeg_quality 95;
        proxy_pass http://localhost:8088;
        error_page 400 401 402 403 404 415 502 503 504 = @nouserimg;
    }

    location ~ ^/image/user/([a-f0-9]+)$ {
        access_log  off;
        set $oid $1;
        rewrite ^ /user/$oid last;
    }

    location /user/ {
        access_log  off;
        gridfs mongodb_for_image root_collection=user_image_collection;
        mongo "rplsetname" rpl1.mongodb.host:27017 rpl2.mongodb.host:27017;
        error_page 400 401 402 403 404 415 502 503 504 = @noimg;
    }

    location ~ ^/image/dish/([a-f0-9]+)$ {
        access_log  off;
        set $oid $1;
        rewrite ^ /dish/$oid last;
    }

    location /dish/ {
        access_log  off;
        gridfs mongodb_for_image root_collection=dish_image_collection;
        mongo "rplsetname" rpl1.mongodb.host:27017 rpl2.mongodb.host:27017 rpl3.mongodb.host:27017;
        error_page 400 401 402 403 404 415 502 503 504 = @noimg;
    }

    location @noimg {
        access_log  off;
        rewrite ^ http://snapdi.sh/img/notfound.png break;
    }

}

server {

    listen 8088;

    server_name localhost;

    location ~ ^/image/dish/([a-f0-9]+)/crop/([0-9][0-9][0-9]) {
        access_log  off;
        set $oid $1;
        rewrite ^ /dish/$oid last;
    }

    location /dish/ {
        access_log  off;
        gridfs mongodb_for_image root_collection=dish_image_collection;
        mongo "rplsetname" rpl1.mongodb.host:27017 rpl2.mongodb.host:27017 rpl3.mongodb.host:27017;
        error_page 400 401 402 403 404 415 502 503 504 = @noimg;
    }

    location ~ ^/image/user/([a-f0-9]+)/crop/([0-9][0-9][0-9]) {
        set $oid $1;
        rewrite ^ /user/$oid last;
    }

    location /user/ {
        access_log  off;
        gridfs mongodb_for_image root_collection=user_image_collection;
        mongo "rplsetname" rpl1.mongodb.host:27017 rpl2.mongodb.host:27017 rpl3.mongodb.host:27017;
        error_page 400 401 402 403 404 415 502 503 504 = @noimg;
    }

    location @noimg {
        access_log  off;
        rewrite ^ http://snapdi.sh/img/notfound.png break;
    }

}

This looks really interesting. I've recently started using mongodb/nginx/gridfs on a large-scale project and am learning a lot of really cool useful things you can do with that stack, so I get the "gist" of what you're doing but could you explain it a little more?

It looks like you're redirecting requests for images in nginx across mongo gridfs replicasets.