hi, ich habe zwei ISCSI Datenträger zwei mal eingebunden über verschiedene Netzwerkkarten. Diese habe ich per multipath verbunden. Das klappt soweit gut. Nun habe ich einfach den Stecker von einer Karte gezogen und eigentlich hätte ich erwartet, dass multipath das augenblicklich erkennt und umschaltet. Doch zwischen Kabel ziehen und umschalten sind locker 6 Minuten vergangen:
Jun 2 01:24:49 dom0 multipathd: vm03-swap: event checker started
Jun 2 01:24:59 dom0 multipathd: vm03-disk: stop event checker thread
Jun 2 01:24:59 dom0 multipathd: vm03-swap: stop event checker thread
Jun 2 01:25:01 dom0 multipathd: vm03-disk: event checker started
Jun 2 01:25:01 dom0 multipathd: vm03-swap: event checker started
Jun 2 01:25:01 dom0 multipathd: path checkers start up
Jun 2 01:35:38 dom0 kernel: kjournald starting. Commit interval 5 seconds
Jun 2 01:35:38 dom0 kernel: EXT3 FS on dm-9, internal journal
Jun 2 01:35:38 dom0 kernel: EXT3-fs: mounted filesystem with ordered
data mode.
Jun 2 01:35:59 dom0 kernel: tg3: eth1: Link is down.
Jun 2 01:41:22 dom0 kernel: connection0:0: iscsi: detected conn error
(1011)
Jun 2 01:41:23 dom0 iscsid: detected iSCSI connection 0:0 error (1011)
state (3)
Jun 2 01:41:26 dom0 iscsid: connect failed (113)
Jun 2 01:41:58 dom0 last message repeated 6 times
Jun 2 01:43:02 dom0 last message repeated 12 times
Jun 2 01:43:18 dom0 last message repeated 3 times
Jun 2 01:43:22 dom0 kernel: session0: iscsi: session recovery timed
out after 120 secs
Jun 2 01:43:22 dom0 kernel: sd 14:0:0:0: scsi: Device offlined - not
ready after error recovery
Jun 2 01:43:22 dom0 kernel: sd 14:0:0:0: scsi: Device offlined - not
ready after error recovery
Jun 2 01:43:22 dom0 kernel: sd 14:0:0:0: SCSI error: return code =
0x00020000
Jun 2 01:43:22 dom0 kernel: end_request: I/O error, dev sdb, sector 4736
Jun 2 01:43:22 dom0 kernel: device-mapper: multipath: Failing path 8:16.
Jun 2 01:43:22 dom0 multipathd: sdb: readsector0 checker reports path
is down
Jun 2 01:43:22 dom0 multipathd: checker failed path 8:16 in map vm03-disk
Jun 2 01:43:22 dom0 multipathd: vm03-disk: remaining active paths: 1
Jun 2 01:43:22 dom0 multipathd: vm03-disk: switch to path group #2
Jun 2 01:43:24 dom0 iscsid: connect failed (113)
Jun 2 01:43:57 dom0 last message repeated 7 times
Für virtuelle Gäste ist das mit Sicherheit nicht gesund.
Die Config sieht so aus:
defaults {
user_friendly_names yes
}
defaults {
udev_dir /dev
polling_interval 5
default_selector "round-robin 0"
default_getuid_callout "/sbin/scsi_id -g -u -s /block/%n"
failback immediate
}
blacklist {
wwid SATA_TOSHIBA_MK8032G_163W3498T
devnode "^(ram|raw|loop|fd|md|dm-|sr|scd|st)[0-9]*"
devnode "^hd[a-z][[0-9]*]"
devnode "^cciss!c[0-9]d[0-9]*[p[0-9]*]"
}
multipaths {
multipath {
'''wwid
1494554000000000000000000010000001b1600000d000000'''
alias vm03-disk
path_grouping_policy failover
path_checker readsector0
}
multipath {
'''wwid
149455400000000000000000002000000261600000d000000'''
alias vm03-swap
path_grouping_policy failover
path_checker readsector0
}
}
Hat da jemand eine Erklärung für?
cu denny
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