I've put the first suitable-for-someone-other-than-me release of python director up on pythondirector.sourceforge.net. This is a pure python (async I/O based) TCP loadbalancer/redirector. Why another load balancer? Well, the ones that are out there are just not what I want or need. Python Director's aimed at people who want or need a more sophisticated load balancer than something that just provides a round robin service, and at the same time is manageable without a restart. Note that pydir handles any TCP protocol - not just HTTP. We use it to loadbalance fastcgi fine. Requires: Python 2.1 or greater. feedback invited. Anthony -- Anthony Baxter <anthony@interlink.com.au> It's never too late to have a happy childhood. ---------- Full readme file follows: ---------- This is a pure python TCP load balancer. It takes inbound TCP connections and connects them to one of a number of backend servers. Project home: http://pythondirector.sourceforge.net/ Contact email: Anthony Baxter <anthony@interlink.com.au> ---------------------------------------------------------------------- Features: - async i/o based, so much less overhead than fork/thread based balancers - Multiple scheduling algorithms (random, round robin, leastconns) - If a server fails to answer, it's removed from the pool - the client that failed to connect gets transparently failed over to a new host. - xml based configuration file - seperate management thread that periodically re-adds failed hosts if they've come back up. - optional builtin webserver for admin ---------------------------------------------------------------------- API (web based): Admin interface: running / running.txt current configuration and status of the PD (HTML / text) config.xml - initial config of the PD (xml) running.xml current running config of the PD (xml) Host mgmt: addHost?service=NNN&group=NNN&ip=NNN:n - add a new host to the group of a service delHost?service=NNN&group=NNN&name=NNN:n - remove a host from the group of a service delAllHosts?service=NNN&group=NNN - remove all hosts from the group of a service Note that the last two will not let you remove all hosts from the enabled group. group mgmt: enableGroup?service=NNN&group=NNN - switch the currently enabled group. Note that this will not affect any in-progress connections. changeScheduler?service=NNN&group=NNN&scheduler=NNN user mgmt: addUser delUser service mgmt: others: ---------------------------------------------------------------------- Changes from 0.0.2 to 0.0.3: - delHost hooked up - running.xml added - XML dump of current config - centralised logging - the various things that write logfile entries need to be made consistent, and a lot of additional logging needs to be added. - Python2.1 compatibility fix: no socket.gaierror exception on 2.1 Changes from 0.0.1 to 0.0.2: - refactored web publishing (babybobo) - package-ised and distutil-ised the code ---------------------------------------------------------------------- This software is covered by the following license: Copyright (c) 2002 ekit.com Inc (http://www.ekit-inc.com/) and Anthony Baxter <anthony@interlink.com.au> Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.