Forum OpenACS Development: Re: Multiple DNS and subsites

Posted by Benjamin Brink on
Posted by Iuri Sampaio on

That's exactly what I'm trying to accomplish. It's still not clear to me how to achieve it.

Is hostnode feature on OpenACS 5.7 and AOLServer 4.5 simply broken?

Best wishes

Posted by Benjamin Brink on
That combination may be an issue. iirc when I used aolserver 4.x, either ns_conn or ad_conn would return an empty string *sometimes* in the context of visiting a host-node mappped url on earlier versions of Openacs ( up to about 5.3). One of the local motivations for switching to naviserver was to avoid the chronic issues with aolserver. At some point around 5.6 to 5.8 server level errors increased by a factor of 4.

An incredible amount of refactoring OpenACS has happened since 5.7, incluiding upgrading tcl syntax. Here is a discussion about compatibility matrix of oacs 5.7 and dependencies:
And the compatibility matrix:

Definitely go with naviserver if you can make the change.

Posted by Gustaf Neumann on
Concerning "server level errors": With the current version of OpenACS the number of erros is very little. We have now weeks on without a single error or with very little errors in the error.log (in the following graphic, these is the orange line)

Up to january this year, had on average 1 error per second.

Concerning the request of Iuri: i did some tests and fixed a few issues (mostly IPv6) and the following testing scenarios work fine:

Testing setup (A):
- http-port: 8009
- https-port: 8443
- base-hostname: localhost
- alternate-hostname: hugo
- main-subsite: /
- alternate-subsite: /hugo
- host-node map: hostname "hugo" -> /hugo/
- apm-parameter (acs-tcl): UseHostnameDomainforReg: 0

In this setup, the subsite (here: /hugo/) has to be given explicit read permission for public, otherwise, one cannot login, since subsite/register won't work (one needs already permissions to reach the subsite main node). Therefore, the site-admin has to grant read permissions to the public explicitly.

Other than this, everything looks ok with setup (A), the subsite works with http and https.

Testing setup (B):
- same as above, but:
- apm-parameter (acs-tcl): UseHostnameDomainforReg: 1

When UseHostnameDomainforReg is activated:
- login is redirected to the main site; the return_url as well.
- login cookies are set on the main-site and are not available on the subsite via the browser (maybe when setting "CookieDomain" and use "domain cookies" and appropriate sub-domain host names; not tested).
- This means that out of the box the user does not stay on the subsite but has to do all authorized work on the main site (which makes management of different users on subsite useless).

Also setup (B) works as well with the newest version in the oacs-5-9 branch. There were some issues in earlier version, but the actual version is fine in this respect. No nginx is involved.

For more details. see:

all the best

Posted by Iuri Sampaio on
Hi there,

@Gustaff, Nice results!
So far, I've set up a fresh installation of OACS 5.9 instance under NaviServer and Postgresql 9.1.

I assigned to the same IP that uses. Both DNS's point to /var/www/oacs-5-9/. There is only one NS service up, thus a unique config file: iurix.tcl.

I've created eventeasy as an acs-subsite. I've created a host-node /eventeasy

However I don't have the behavior expected. the address shows the Main Site. It was supposed to display /eventeasy.

Take a look:

Best wishes