We have several rails apps under common domain in Docker, and we use nginx to direct requests to specific apps.
our_dev_server.com/foo # proxies to foo app
our_dev_server.com/bar # proxies to bar
Config looks like this:
upstream foo {
server foo:3000;
}
upstream bar {
server bar:3000;
}
# and about 10 more...
server {
listen *:80 default_server;
server_name our_dev_server.com;
location /foo {
# this is specific to asset management in rails dev
rewrite ^/foo/assets(/.*)$ /assets/$1 break;
rewrite ^/foo(/.*)$ /foo/$1 break;
proxy_pass http://foo;
}
location /bar {
rewrite ^/bar/assets(/.*)$ /assets/$1 break;
rewrite ^/bar(/.*)$ /bar/$1 break;
proxy_pass http://bar;
}
# and about 10 more...
}
If one of these apps is not started then nginx fails and stops:
host not found in upstream "bar:3000" in /etc/nginx/conf.d/nginx.conf:6
We don't need them all to be up but nginx fails otherwise. How to make nginx ignore failed upstreams?