On Tue, Oct 11, 2011 at 10:39:43AM +0100, keith wrote:
> We have nginx setup as a reverse proxy and on one of the backend servers
> we have a Sharepoint website that we want to failover to a Wordpress
> website hosted on another server if there's a problem with Sharepoint
> website. I've googled and red through books etc but can't we an example
> for this. I think i need "try_files" and some type of error code
> checking but havent been able to figure it out. Could someone advice ?
> Below is the type of thing that I think I am after.
>
> Thanks for looking.
> Keith
>
> upstream primaryserver { server 10.1.1.1:80; }
> upstream secondaryserver { server 10.1.1.2:80; }
>
> server
> {
> listen 80;
> server_name _;
> server_name_in_redirect off;
>
> location /
> {
> try_files @sharepoint @wordpress;
> }
> location @sharepoint
> {
> proxy_pass http://primaryserver;
> proxy_set_header Host $host;
> proxy_connect_timeout 3;
> proxy_next_upstream error timeout;
> }
>
> location @wordpress
> {
> proxy_pass http://secondaryserver;
> proxy_set_header Host $host;
> proxy_connect_timeout 3;
> proxy_next_upstream error timeout;
> }
>
> }

"try_files" tries files, but not proxied requests.
There are two way to fallback to backup servers:

1)
upstream sharepoint {
server primaryserver;
server secondaryserver backup;
}

server {
location / {
proxy_pass http://sharepoint;
proxy_set_header Host $host;
proxy_connect_timeout 3;
}
}

2)
server {
location / {
proxy_pass http://primaryserver;
proxy_set_header Host $host;
proxy_connect_timeout 3;
proxy_intercept_errors on;
error_page 502 504 @wordpress;
}

location @wordpress {
proxy_pass http://secondaryserver;
proxy_set_header Host $host;
proxy_connect_timeout 3;
}
}


--
Igor Sysoev

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