Date: Tue, 29 Mar 2011 23:36:32 +0300 From: Mikolaj Golub <trociny@freebsd.org> To: Denny Schierz <linuxmail@4lin.net> Cc: stable@freebsd.org Subject: Re: way for failover zpool (no HAST needed) Message-ID: <86ipv1ll4f.fsf@kopusha.home.net> In-Reply-To: <1301397421.11113.250.camel@pcdenny> (Denny Schierz's message of "Tue, 29 Mar 2011 13:17:01 %2B0200") References: <1301397421.11113.250.camel@pcdenny>
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On Tue, 29 Mar 2011 13:17:01 +0200 Denny Schierz wrote:
DS> hi,
DS> my two nodes are running fine with 8.2-stable and the LSI 9200-8e and
DS> now, I want to build a failover for the Zpool (and later ISCSI target)
DS> Both nodes are connected to the same disks (jbod) and now I need a way,
DS> to get the zpool(s) running on the node with the CARP public IP.
You don't need HAST but might you want to try net-mgmt/hastmon? :-)
I wrote it because didn't like much failovering with CARP.
For hastmon you need at least 3 hosts: 2 cluster nodes (primary/secondary) and
watchdog. Watchdog is polling the states of the cluster nodes. Secondary
decides to failover when:
1) There is no connection with primary.
2) There are complaints from watchdog.
The configuration is simple and would look like below (on all 3 hosts):
resource iscsi {
exec /etc/iscsi.sh
on hostA {
remote hostB
priority 0
}
on hostB {
remote hostA
priority 1
}
on hostW {
remote hostA hostB
}
}
/etc/iscsi.sh script should support at least 3 arguments:
start -- switch node to primary (iscsi up, IP up, etc);
stop -- switch node to secondary;
status -- return current status (0 - UP, 1 - DOWN, 2 - UNKNOWN).
You can find more information in README:
http://code.google.com/p/hastmon/wiki/README
--
Mikolaj Golub
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