A working watchdog API
phk at phk.freebsd.dk
Thu Jul 31 04:13:46 PDT 2003
In message <20030731002304.GA5131 at edgemaster.zombie.org>, Sean Kelly writes:
>Comments? Ideas? Questions? Death threats?
Looks good to me.
I tacitly assume that (something like) the <sys/watchdog.h> interface
will remain for userland components to "take over" the patting of
One thing we may want to consider is to write a configurable userland
watchdogd process which will examine various vital statistics and
pat the watchdog if everything is fine.
Amongst the things I could imagine watchdogd looking at:
Precense of carrier on network interfaces
A certain minimum amount of trafic on an interface
Ping'ability of a given IP#
Being able to connect to a given tcp port.
A given process still running.
Being able to create, write, fsync, close and remove a given file
(to see that a disk is not hung).
Any takes ?
Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG | TCP/IP since RFC 956
FreeBSD committer | BSD since 4.3-tahoe
Never attribute to malice what can adequately be explained by incompetence.
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