I'm trying to set up failover for a reverse-proxied server with a localhost static copy of resources that would usually be served by a content management system. I've used
wget to grab a static copy of the dynamic site for failover purposes.
I've tried to use a configuration similar to Fall-back location for Apache's ProxyPass directive? to get things started, and it's a fairly straightforward, but I'm getting the error in the title.
Here's my (sanitized) proxy configuration:
DocumentRoot /var/www/www.example.com/htdocs ProxyRequests Off ProxyPreserveHost On ProxyPass "/site/" "balancer://cms" ProxyPassReverse "/site/" "balancer://cms" ProxyPassReverse "/site/" "http://ip-10-1-1-229.ec2.internal/site/" <Proxy "balancer://cms"> #BalancerMember "http://ip-10-1-1-229.ec2.internal/site/" loadfactor=1 # For localhost services, a backup of the CMS's site BalancerMember "http://127.0.0.1/site-backup/www.example.com/site/" loadfactor=10 status=+H </Proxy> <Directory "/var/www/www.example.com/htdocs/site-backup"> Order allow,deny Allow from all Options Indexes FollowSymlinks DirectoryIndex index.html </Directory>
(Here, I've commented-out the balancer member that goes to the real CMS system -- that part is working just fine -- so that I can test the local, static copy.)
There is an
index.html file in
/var/www/www.example.com/site-backup/www.example.com/ and it does get loaded when I try to hit
http://www.example.com/site/, but none of the page's other resources (CSS, images, etc.) get loaded. They have URLs in the page like:
I have a file,
foo.png at this location:
But when that image is loaded by the browser, I get a
500 Internal Server Error response and I see this in httpd's error log:
[proxy:warn] [pid 3182:tid 2838395712] [client 188.8.131.52:38208] AH01144: No protocol handler was valid for the URL /site/site/sites/default/files/foo.png. If you are using a DSO version of mod_proxy, make sure the proxy submodules are included in the configuration using LoadModule., referer: http://test.example.com/site/
I noticed that the URL shown in the error message has an extra
/site/ in the URL, so I figured it was getting doubled because I'm trying to serve a URL space including
/site/ from a directory containing
wget is probably not perfect right now, so I created a symlink from
/var/www.www.example.com/site-backups/www.example.com/site/sites. That ought to have fixed any foolishness due to URL confusion.
But that didn't seem to fix anything;
mod_proxy is still complaining about the protocol.
mod_proxy_http is definitely enabled, as the normal
ProxyPass directive to the CMS is working as expected (when enabled).
I'm sure this is a fairly simple thing I'm missing, but I can't seem to figure it out. Any help would be greatly appreciated.