[Pacemaker] Frequent SBD triggered server reboots

[emmanuel segura]

if you think your problems are related to multipath timeout, try to use
multipath -v3 and look well the sbd timeout

Thanks


2013/5/2 andrea cuozzo <andrea.cuozzo at sysma.it>

> Hi Emmanuel,
>
> it's a merge of the default settings I've taken from the
> /usr/share/doc/package/multipath-tools/multipath.conf.annotated   and the
> OPEN-* section of the HPDMmultipath-4.4.1 multipath.conf.HPTemplate.SLES11
> file, here it is:
>
>
> defaults {
>         udev_dir                /dev
>         polling_interval        5
>         selector                "round-robin 0"
>         prio                    const
>         user_friendly_names     no
>         getuid_callout          "/lib/udev/scsi_id --whitelisted
> --device=/dev/%n"
>         failback                manual
>         no_path_retry           fail
> }
> blacklist {
>         devnode         "^(ram|raw|loop|fd|md|dm-|sr|scd|st)[0-9]*"
>         devnode         "^hd[a-z][[0-9]*]"
> }
> blacklist_exceptions {
> }
> multipaths {
>         multipath {
>                 alias "san"
>                 wwid "360060e8006d2e1000000d2e1000000e6"
>         }
> }
> devices {
> # For XP arrays
>
>   device {
>         vendor                  "HP"
>         product                 "OPEN-.*"
>         path_grouping_policy    multibus
>         path_selector           "round-robin 0"
>         rr_min_io               1000
>         rr_weight               uniform
>         path_checker            tur
> #       no_path_retry           18
> #       hardware_handler        "0"
> #       failback                immediate
> #       getuid_callout          "/lib/udev/scsi_id -g -u /dev/%n"
>   }
>
> }
>
> I've commented out some of the HP template device lines due to the
> recommended configuration for clustering, read in the SLES 11 Sp1 Storage
> Administration Guide:
>
> "We recommend failback setting of "manual" for multipath in cluster
> environments in order to prevent multipath failover ping-pong."
>
> and in the mailing list: " Fourth, don't run SBD on queue_if_no_path MPIO."
> From Mr. Lars at this link: http://en.it-usenet.org/thread/18723/12998/
>
> And this my multipath -ll output:
>
> server1:~ # multipath -ll
>
> san (360060e8006d2e1000000d2e1000000e6) dm-0 HP,OPEN-V
> size=50G features='0' hwhandler='0' wp=rw
> `-+- policy='round-robin 0' prio=1 status=active
>   |- 1:0:0:0 sdb 8:16 active ready running
>   `- 2:0:0:0 sdc 8:32 active ready running
>
> andrea
>
>
> ----- Original Message -----
> From: emmanuel segura
> Newsgroups: gmane.linux.highavailability.pacemaker
> To: The Pacemaker cluster resource manager
> Sent: Thursday, May 02, 2013 4:25 PM
> Subject: Re: Frequent SBD triggered server reboots
>
>
> Hello Andrea
>
>
> Can you show me your multipath.conf?
>
>
> Thanks
>
>
>
>
>
>
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