Multipath - Cronologia

WikiSysop: /* Referenze */

2017-11-21T14:10:45Z

Referenze

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	https://www.ibm.com/support/knowledgecenter/en/STPVGU/com.ibm.storage.svc.console.720.doc/svc_linux_settings.html		https://www.ibm.com/support/knowledgecenter/en/STPVGU/com.ibm.storage.svc.console.720.doc/svc_linux_settings.html

			https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/dm_multipath/config_file_multipath

	==Comandi==		==Comandi==

WikiSysop: /* Referenze */

2017-11-21T14:10:25Z

Referenze

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	==Referenze==		==Referenze==
	https://help.ubuntu.com/lts/serverguide/multipath-admin-and-troubleshooting.html		https://help.ubuntu.com/lts/serverguide/multipath-admin-and-troubleshooting.html

			https://www.ibm.com/support/knowledgecenter/en/STPVGU/com.ibm.storage.svc.console.720.doc/svc_linux_settings.html

	==Comandi==		==Comandi==

WikiSysop il 14:10, 21 nov 2017

2017-11-21T14:10:06Z

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	</pre>		</pre>

			==Referenze==
			https://help.ubuntu.com/lts/serverguide/multipath-admin-and-troubleshooting.html

	==Comandi==		==Comandi==

WikiSysop: /* Comandi */

2017-11-21T10:00:03Z

Comandi

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	==Comandi==		==Comandi==
	echo show config \| multipathd -k		echo 'show config' \| multipathd -k
	echo 'reconfigure' \| multipathd -k		echo 'reconfigure' \| multipathd -k
	echo 'list multipaths status' \| multipathd -k		echo 'list multipaths status' \| multipathd -k

WikiSysop: /* Conbfigurazione */

2017-11-21T09:50:24Z

Conbfigurazione

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 File di configurazione del multipath con SuSE Sles9
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 </pre>
 [[Categoria:Unix]]

WikiSysop il 10:38, 30 ott 2017

2017-10-30T10:38:18Z

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			=Conbfigurazione=
	File di configurazione del multipath con SuSE Sles9		File di configurazione del multipath con SuSE Sles9

WikiSysop: WikiSysop ha spostato la pagina Multipath SLES9 a Multipath senza lasciare redirect

2017-10-30T10:37:10Z

WikiSysop ha spostato la pagina Multipath SLES9 a Multipath senza lasciare redirect

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Versione delle 10:37, 30 ott 2017

WikiSysop il 15:26, 12 mag 2010

2010-05-12T15:26:15Z

Nuova pagina

File di configurazione del multipath con SuSE Sles9

<pre>
##
## This is a template multipath-tools configuration file
## Uncomment the lines relevent to your environment
##
defaults {
default_features "1 queue_if_no_path"
# multipath_tool "/sbin/multipath -v0"
# udev_dir /dev
# polling_interval 10
# default_selector "round-robin 0"
# default_path_grouping_policy multibus
# default_getuid_callout "/sbin/scsi_id -g -u -s /block/%n"
# default_prio_callout "/bin/true"
# default_features "0"
# rr_min_io 100
# rr_weight priorities
# failback immediate
}
devnode_blacklist {
wwid 41021712362D87000000
wwid 1AMCC_41021712362D87000000
devnode "^(ram|raw|loop|fd|md|dm-|system-|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 3600508b4001063830000900000940000
alias vmware_transito
}
multipath {
wwid 3600508b40010638300009000009c0000
alias vmware_server
}
}
devices {
device {
vendor "HP "
product "HSV200 "
path_grouping_policy group_by_prio
getuid_callout "/sbin/scsi_id -g -u -s /block/%n"
path_checker tur
path_selector "round-robin 0"
prio_callout "/sbin/mpath_prio_alua %d"
failback immediate
}
}

</pre>

<pre>

# cat /etc/multipath.conf
blacklist {
wwid 20010b9fd080b7321
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]*]"
}

devices {
device {
vendor "EMC "
product "SYMMETRIX"
path_grouping_policy multibus
getuid_callout "/sbin/scsi_id -g -u -s /block/%n"
path_selector "round-robin 0"
features "0"
hardware_handler "0"
failback immediate
}
device {
vendor "DGC"
product "*"
path_grouping_policy group_by_prio
getuid_callout "/sbin/scsi_id -g -u -s /block/%n"
prio_callout "/sbin/mpath_prio_emc /dev/%n"
hardware_handler "1 emc"
features "1 queue_if_no_path"
no_path_retry 300
path_checker emc_clariion
failback immediate
}
}

multipaths {
multipath {
wwid
3600601608d1e170090af86321308db11
alias san1
path_grouping_policy failover
failback immediate
}
multipath {
wwid
360060160a1f4160072ee88ba1208db11
alias san2
path_grouping_policy failover
failback immediate
}
}

</pre>

Con la SLES9 ci potrebbero essere seri problemi se si utilizzasse LVM2 su device multipath, poiché per default <code>multipath</code> non esegue la scansione della tavola delle partizioni e la creazione degli special files associati.
In pratica dopo l'esecuzione di <code>boot.multipath</code> i device <code>/dev/mapper/mpathX</code> sarebbero leggibili, ma gli eventuali devices relativi alle partizioni <code>/dev/mapper/mpathXpY</code> non lo sarebbero.
Per renderli leggibili bisogna eseguire il comando:
<code>
/sbin/kpartx -a /dev/mapper/mpathX
</code>
per ogni device.
Per fare ciò, può essere conveniente modificare <code>boot.local</code> in questo modo:

<pre>
/sbin/modprobe dm-multipath
/sbin/multipath
/sbin/kpartx -a /dev/mapper/mpath0
/sbin/kpartx -a /dev/mapper/mpath1
/sbin/kpartx -a /dev/mapper/mpath2
/sbin/kpartx -a /dev/mapper/mpath3

vgscan --mknodes
</pre>

http://support.novell.com/techcenter/sdb/en/2005/04/sles_multipathing.html

[http://www.sinenomine.net/system/files/Enabling+root-on-multipath+for-SLES-9-zSeries.pdf | Come configurare multipath per il root device]

Config alternativo by RedHat & EMC2 CX300
<pre>
devnode_blacklist {
devnode "^(ram|raw|loop|fd|md|dm-|sr|scd|st)[0-9]*"
devnode "^hd[a-z]"
devnode "^cciss!c[0-9]d[0-9]*"
}

defaults {
user_friendly_names yes
}

devices {
device {
vendor "DGC "
product "*"
path_grouping_policy group_by_prio
getuid_callout "/sbin/scsi_id -g -u -s /block/%n"
prio_callout "/sbin/mpath_prio_emc /dev/%n"
path_checker emc_clariion
path_selector "round-robin 0"
features "1 queue_if_no_path"
no_path_retry 300
hardware_handler "1 emc"
failback immediate
}
}

</pre>

[[Categoria:Unix]]
[[Categoria:OpenSource]]