Hi,
Quoting christian@xxxxxxx:
Hi,
We have recently been working on a cyrus murder setup including
CalDAV and CardDAV.
For IMAP there are two possibilities to achieve high availability &
load balancing:
* Use the proxing capability to get to the right backend
* Connect to a random backend and use IMAP Login referrals to find
the correct backend.
For *DAV it seems proxying should be possible, but we quickly found
at least two issues which seems to tell me nobody is using it this
way:
* PUT requests are not proxied (I put in a pull request to fix this:
https://github.com/cyrusimap/cyrus-imapd/pull/4302)
* autocreate does not work (is attempted on the proxy instead of the
backend).
The alternative approach that somewhat mirrors what IMAP login
referrals do would be to use the *DAV discovery mechanism
essentially doing a 30x redirect to the correct backend,
but I don't suppose this is currently implemented?
I could work on either solution but was wondering whether somebody
has solved a similar issue, or whether I'm overlooking something.
We are still using Cyrus 3.0 in a murder setup but without CalDAV/CardDAV
Redirect would not work in our setup as we use private (10.0.0.0/8) IPs for
our backends. We have disabled imap referrals for the same reason and
use proxying
only.
--------------------------------------------------------------------------------
Michael Menge Tel.: (49) 7071 / 29-70316
Universität Tübingen Fax.: (49) 7071 / 29-5912
Zentrum für Datenverarbeitung mail:
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Wächterstraße 76
72074 Tübingen
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Cyrus: Info
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