The OpenBSD PF-MIB stuff is incredibly useful -- especially the
PF-MIB:CarpIFTable objects. Thanks to all involved with that. I've also
had success with Net-SNMP 5.4 (opti@'s version) with those patches; will
try to port them to other PF-enabled OSs soon.
In the mean time, I want to keep going with additional debugging and
monitoring functionality in CARP. Here is a small patch that is
incredibly useful for troubleshooting and debugging cumbersome issues.
Silence is killer, especially when you turn on "logging" and receive
nothing:
This adds functionality similar to "debug standby" in Cisco-land:
*Mar 1 02:56:13: %LINEPROTO-5-UPDOWN: Line protocol on Interface
FastEthernet3/0, changed state to up
*Mar 1 02:56:14: SB0: FastEthernet3/0 state Listen -> Init
*Mar 1 02:56:20: SB0: FastEthernet3/0 state Init -> Listen
*Mar 1 02:56:30: SB0: FastEthernet3/0 state Listen -> Speak
*Mar 1 02:56:40: SB0: FastEthernet3/0 state Speak -> Standby
*Mar 1 02:56:41: SB0: FastEthernet3/0 state Standby -> Active
With this patch:
# ifconfig carp40 vhid 40 carpdev pcn0 pass foo up
Jun 20 03:05:46 vmware-openbsd-lab /bsd: carp40: state transition from: MASTER
-> to: INIT
Jun 20 03:05:46 vmware-openbsd-lab /bsd: carp40: state transition from: INIT ->
to: BACKUP
Jun 20 03:05:46 vmware-openbsd-lab /bsd: carp40: state transition from: BACKUP
-> to: INIT
Jun 20 03:05:46 vmware-openbsd-lab /bsd: carp40: state transition from: INIT ->
to: BACKUP
Jun 20 03:05:46 vmware-openbsd-lab /bsd: carp40: state transition from: BACKUP
-> to: INIT
Jun 20 03:05:46 vmware-openbsd-lab /bsd: carp40: state transition from: INIT ->
to: BACKUP
Jun 20 03:05:49 vmware-openbsd-lab /bsd: carp40: state transition from: BACKUP
-> to: MASTER
I think there are probably ~20 other CARP_LOG() calls that could improve
the experience, but this is a good place to start and we'll move on from
there.
Against the OPENBSD_4_1 tree (rev 1.132.2.1):
# cvs diff -u ip_carp.c
Index: ip_carp.c
===================================================================
RCS file: /cvs/src/sys/netinet/ip_carp.c,v
retrieving revision 1.132.2.1
diff -u -r1.132.2.1 ip_carp.c
--- ip_carp.c 2007/04/30 20:39:44 1.132.2.1
+++ ip_carp.c 2007/06/20 07:03:15
@@ -2111,6 +2111,8 @@
void
carp_set_state(struct carp_softc *sc, int state)
{
+ static const char *carp_states[] = { CARP_STATES };
+ CARP_LOG(sc, ("state transition from: %s -> to: %s",
carp_states[sc->sc_state], carp_states[state]));
if (sc->sc_state == state)
return;
l8*
-lava (Brian A. Seklecki - Pittsburgh, PA, USA)
http://www.spiritual-machines.org/
"Guilty? Yeah. But he knows it. I mean, you're guilty.
You just don't know it. So who's really in jail?"
~Maynard James Keenan
