A simple load balancer for tcp based protocols
Pen is a load balancer for "simple" tcp based protocols such as http or smtp. It allows several servers to appear as one to the outside and automatically detects servers that are down and distributes clients among the available servers. This gives high availability and scalable performance.
The load balancing algorithm keeps track of clients and will try to send them back to the server they visited the last time. This is useful for applications that maintain state between connections in the server, including most modern web applications.
When pen detects that a server is unavailable, it scans for another starting with the server after the most recently used one. That way we get load balancing and "fair" failover for free.
Correctly configured, pen can ensure that a server farm is always available, even when individual servers are brought down for maintenance or reconfiguration.
The final single point of failure, pen itself, can be eliminated by running pen on several servers, using vrrp to decide which is active.
- Devel package for openSUSE:Factory
-
2
derived packages
- Links to openSUSE:Factory / pen
- Download package
-
Checkout Package
osc -A https://api.opensuse.org checkout network/pen && cd $_ - Create Badge
Source Files
| Filename | Size | Changed |
|---|---|---|
| init.pen | 0000002492 2.43 KB | |
| pen-0.34.1.tar.gz | 0000184622 180 KB | |
| pen.cfg | 0000000715 715 Bytes | |
| pen.changes | 0000008759 8.55 KB | |
| pen.service | 0000000659 659 Bytes | |
| pen.spec | 0000003319 3.24 KB | |
| runpen.sh | 0000000511 511 Bytes |
Revision 8 (latest revision is 11)
Dirk Mueller (dirkmueller)
committed
(revision 8)
- update to 0.34.1: * Corrected typo in pen.c per suggestion by Belinda Liu. * Merged pull request from Vincent Bernat for OpenSSL 1.1.0 compatibility. * Allow setting local address for upstream connections. This fixes issue #31. * Fixed issue #30: UDP not working in combination with a configuration file. * In epoll.c: check for EPOLLHUP. * In dsr.c: always use our real mac address, to avoid confusing switches. * Cleaned up code residue surrounded by "#if 0". * Added CS_HALFDEAD for UDP streams that haven't seen traffic in a while. * Bug in pending_and_closing: don't modify the list we're looping over. * Updated pen manpage. * Added transparent UDP test case to testsuite.sh. * Contribution from Talik Eichinger: add X-Forwarded-Proto when doing * SSL decryption. * Added tarpit test case to testsuite.sh. * Tarpit functionality to be used with the DSR mode. * pen.1: removed obsolete -S option, updated defaults for -x and -L. * In failover_server: sanity checks to failover routine. * In add_client: add the initial server to .client as well as .initial. * In failover_server: changed abuse_server to ABUSE_SERVER and emerg_server * to EMERG_SERVER, to handle their default NO_SERVER values. * See issue #19 on Github. * At the suggestion from Marcos Vinicius Rogowski, the hash algorith * will now include the client port number if the -r (roundrobin) * option is used. See https://github.com/UlricE/pen/pull/18 * Released 0.31.0. * Officially released 0.30.1. * Fixed IP-based client tracking. * Removed unnecessary #include <pen.h> in dlist.c * Released 0.30.0.
Comments 0