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linux:multipath [2016/09/02 11:03] vondra [Pridani noveho multipath zarizeni] |
linux:multipath [2017/03/13 17:24] tomsa [Manual failover] |
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* blacklistuje vsechna zarizeni mimo tech s wwid uvedenym v blacklist exceptions | * blacklistuje vsechna zarizeni mimo tech s wwid uvedenym v blacklist exceptions | ||
* multipathy uvadime v sekci multipaths, aby dostali hezke jmeno :) | * multipathy uvadime v sekci multipaths, aby dostali hezke jmeno :) | ||
- | <code> | + | <code json> |
blacklist { | blacklist { | ||
wwid .* | wwid .* | ||
Line 40: | Line 40: | ||
2317936357870636c | 2317936357870636c | ||
</code> | </code> | ||
- | * pridame ho do konfigurace do sekce blacklist_exceptions:<code>wwid "26261353635663533|2317936357870636c"</code> | + | * pridame ho do konfigurace do sekce blacklist_exceptions (oddelovac je |):<code>wwid "26261353635663533|2317936357870636c"</code> |
+ | * dale do sekce multipaths pridame jeho zaznam:<code> | ||
+ | multipath { | ||
+ | wwid 2317936357870636c | ||
+ | alias mach3 | ||
+ | } | ||
+ | </code> | ||
+ | * nacteme konfiguraci:<code> | ||
+ | multipath -v2 | ||
+ | create: mach3 (2317936357870636c) undef SCST_FIO,raid-disk | ||
+ | size=9.1T features='0' hwhandler='0' wp=undef | ||
+ | |-+- policy='service-time 0' prio=1 status=undef | ||
+ | | `- 1:0:2:1 sdh 8:112 undef ready running | ||
+ | `-+- policy='service-time 0' prio=1 status=undef | ||
+ | `- 15:0:0:1 sdj 8:144 undef ready running | ||
+ | </code> | ||
+ | * overime, ze multipath funguje:<code> | ||
+ | multipath -ll | ||
+ | backup (26261353635663533) dm-0 SCST_FIO,raid-disk | ||
+ | size=11T features='0' hwhandler='0' wp=rw | ||
+ | |-+- policy='service-time 0' prio=1 status=active | ||
+ | | `- 1:0:1:1 sddf 70:208 active ready running | ||
+ | `-+- policy='service-time 0' prio=1 status=enabled | ||
+ | `- 14:0:0:1 sdm 8:192 active ready running | ||
+ | mach3 (2317936357870636c) dm-80 SCST_FIO,raid-disk | ||
+ | size=9.1T features='0' hwhandler='0' wp=rw | ||
+ | |-+- policy='service-time 0' prio=1 status=active | ||
+ | | `- 1:0:2:1 sdh 8:112 active ready running | ||
+ | `-+- policy='service-time 0' prio=1 status=enabled | ||
+ | `- 15:0:0:1 sdj 8:144 active ready running</code> | ||
+ | * vzniklo nam zarizeni /dev/mapper/mach3, ktere pouzivame stejne jako jakekoli jine blokove zarizeni | ||
+ | |||
+ | ====Manual failover==== | ||
+ | 1) vyradit jednu z cest | ||
+ | <code bash> | ||
+ | echo offline > /sys/block/ [device name] /device/state | ||
+ | </code> | ||
+ | 2) cestu vratit zpet | ||
+ | <code bash> | ||
+ | echo running > /sys/block/ [device name] /device/state | ||
+ | </code> | ||
+ | |||
+ | Je to vhodne udelat po automatickem failover v pripade, ze se prepne cesta z fc na iscsi. Je nastaveno nevracet se zpet, takze zabitim aktivniho ISCSI donutime multipath zase zacit pouzivat FC |
linux/multipath.txt · Last modified: 2017/03/13 17:24 by tomsa