orgrim / cornet

Maybe a network aware cron daemon

Cornet

About

The goal is to create a cron daemon which can share some cron jobs with other machines on a network. The following possibilities seems mandatory for a start:

• synchronize some cronjobs with other hosts
• allow to edit the crontab from any host
• be transparent: use compatible crontabs with other cron daemons, run aside with other cron daemons.

Source code

The source code, licensed under GNU GPL v2, is available on Github in https://github.com/orgrim/cornet

Features

Mandatory for a proof of concept:

• shared crontab
• registrations/dicovery between nodes
• crontab synchronization
• edit with locks

For a real world use:

• SSL / IPv6
• cron stuff in a module
• private and public crontabs privée: allowing to replace the default cron daemon
• groups of nodes with shared crontab
• at, anacron

Docs:

• HTTP 1.1 (RFC 2616): http://www.faqs.org/rfcs/rfc2616.html
• Condition variables: http://www.cs.cf.ac.uk/Dave/C/node31.html
• Uniform Resource Identifier (RFC 2396): http://www.faqs.org/rfcs/rfc2396.html
• Path computing: "A Star Algorithm":http://en.wikipedia.org/wiki/A_Star_Search_Algorithm

TODO

• Move the following TODO stuff to the tracker
• threaded TCP server --- done
• threaded TCP client
• IPv6 support
• HTTP in a generic library, based on the RFC --- in progress
• Exchange data between nodes (on the "chandail"). Use URLs. RTFM on REST
• Parsing of crontab files
• Follow the clock and handle special cases like daylight saving time switches.
• Execute commands and take care of the shell environment
• crontab edition (unix domain socket? setuid binary (like vixie-cron)?)

Friendly competition

• vixie-cron: ftp://ftp.isc.org/isc/cron/
• fcron: http://fcron.free.fr/
• dcron: http://apollo.backplane.com/FreeSrc/
• bcron: http://untroubled.org/bcron/
• mcron: http://www.gnu.org/software/mcron/design.html -- GNU