Nginx with wordpress refused varnish static content requests, gives 503 errors

Hi!

I just added another wordpress site to my ubuntu server. 2 wordpress sites, not multisite.

They use 2 different fpm pool with same config. Their Nginx config files are basically identical except the fpm socket name and listen to different ip ports.

Site A works perfectly as usual. Site B ( the newly install one ) gives 503 error for all the static files, e.g.: js, css, png, etc

Php and Nginx error logs show no error for this issue.

Conformed that varnish and nginx is connected to each others( at least for php ). In fact, Site B could show the wordpress hello world blog post.

While stopping varnish and use nginx alone. Site B works perfectly with all static content loaded !! However, static files still give 503 errors after turnning varnish back on.

More info: $curl 127.0.0.1:80/robots.txt

return correct files from site A

$curl 127.0.0.2:80/robots.txt

return 503

$ sudo netstat -anp | grep varnish [sudo] password for tangrufus: tcp 0 0 127.0.0.1:6082 0.0.0.0:* LISTEN 1765/varnishd tcp 0 0 0.0.0.0:80 0.0.0.0:* LISTEN 1766/varnishd tcp 0 0 127.0.0.1:46727 127.0.0.2:8080 ESTABLISHED 1766/varnishd tcp 0 0 127.0.0.1:33175 127.0.0.1:8080 ESTABLISHED 1766/varnishd tcp6 0 0 :::80 :::* LISTEN 1766/varnishd unix 2 [ ] DGRAM 11594 1765/varnishd $ sudo netstat -anp | grep nginx tcp 0 0 127.0.0.2:8080 0.0.0.0:* LISTEN 1960/nginx tcp 0 0 127.0.0.1:8080 0.0.0.0:* LISTEN 1960/nginx tcp 0 0 127.0.0.1:8080 127.0.0.1:33240 ESTABLISHED 1963/nginx: worker unix 3 [ ] STREAM CONNECTED 12812 1960/nginx unix 3 [ ] STREAM CONNECTED 12811 1960/nginx Please help