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решение_gmirror_ggate [2010/02/19 16:33] val |
решение_gmirror_ggate [2010/04/20 10:25] val |
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====== Решение GMIRROR GGATE ====== | ====== Решение GMIRROR GGATE ====== | ||
- | |||
- | [[http://www.freebsd.org/doc/en/books/handbook/geom-mirror.html]] | ||
[[http://www.freebsd.org/doc/en/books/handbook/geom-ggate.html]] | [[http://www.freebsd.org/doc/en/books/handbook/geom-ggate.html]] | ||
+ | |||
+ | [[http://phaq.phunsites.net/2006/08/11/realtime-file-system-replication-on-freebsd/]] | ||
+ | |||
+ | ===== Первоначальная конфигурация ===== | ||
+ | |||
+ | Выполняем процедуру [[Добавление дисков]] до создания файловой системы включительно. | ||
<code> | <code> | ||
- | [gate2:~] # cat /etc/gg.exports | + | [gate1:~] # cat /etc/hosts |
- | master RW /dev/ad1s1e | + | ... |
+ | 10.0.0.2 slave | ||
+ | ... | ||
+ | |||
+ | [gate2:~] # cat /etc/hosts | ||
+ | ... | ||
+ | 10.0.0.1 slave | ||
+ | ... | ||
+ | |||
+ | [gateN:~] # cat /etc/gg.exports | ||
+ | slave RW /dev/ad1s1e | ||
+ | |||
+ | [gateN:~] # mkdir /opt | ||
+ | |||
+ | [gateN:~] # cat /etc/periodic.conf | ||
+ | daily_status_gmirror_enable="YES" | ||
+ | </code> | ||
+ | |||
+ | ===== Инициализация ===== | ||
+ | <code> | ||
+ | [gate1:~] # gmirror load | ||
+ | [gate1:~] # gmirror label -v gm0 /dev/ad1s1e | ||
+ | [gate1:~] # gmirror status | ||
+ | |||
+ | [gate1:~] # fsck -y -t ufs /dev/mirror/gm0 | ||
+ | [gate1:~] # mount /dev/mirror/gm0 /opt | ||
[gate2:~] # ggated | [gate2:~] # ggated | ||
[gate1:~] # ggatec create -t 10 -u 0 slave /dev/ad1s1e && echo Success | [gate1:~] # ggatec create -t 10 -u 0 slave /dev/ad1s1e && echo Success | ||
- | Success | ||
[gate1:~] # ggatec list | [gate1:~] # ggatec list | ||
- | ggate0 | ||
- | [gate1:~] # gmirror insert -p 100 gm0 /dev/ad1s1e | + | [gate1:~] # gmirror insert gm0 ggate0 |
- | + | ||
- | [gate1:~] # gmirror label -v -n -b prefer gm0 /dev/ggate0 | + | |
- | Metadata value stored on /dev/ggate0. | + | |
- | Done. | + | |
- | [gate1:~] # gmirror load | + | |
- | [gate1:~] # gmirror insert -p 100 gm0 /dev/ad1s1e | + | |
[gate1:~] # gmirror status | [gate1:~] # gmirror status | ||
- | Name Status Components | + | </code> |
- | mirror/gm0 DEGRADED ggate0 | + | |
- | ad1s1e | + | |
+ | В случае сбоя синхронизации: | ||
+ | <code> | ||
[gate1:~] # gmirror status | [gate1:~] # gmirror status | ||
Name Status Components | Name Status Components | ||
- | mirror/gm0 DEGRADED ggate0 | + | mirror/gm0 DEGRADED ad1s1e |
- | ad1s1e | + | </code> |
- | [gate1:~] # gmirror list gm0 | + | заставляем зеркало "забыть" о недоподключенном диске и вновь подключаем его |
- | Geom name: gm0 | + | <code> |
- | State: DEGRADED | + | [gate1:~] # gmirror forget gm0 |
- | Components: 2 | + | [gate1:~] # gmirror insert gm0 ggate0 |
- | Balance: prefer | + | |
- | Slice: 4096 | + | |
- | Flags: NOAUTOSYNC | + | |
- | GenID: 0 | + | |
- | SyncID: 1 | + | |
- | ID: 3348985214 | + | |
- | Providers: | + | |
- | 1. Name: mirror/gm0 | + | |
- | Mediasize: 1073438720 (1.0G) | + | |
- | Sectorsize: 512 | + | |
- | Mode: r0w0e0 | + | |
- | Consumers: | + | |
- | 1. Name: ggate0 | + | |
- | Mediasize: 1073439232 (1.0G) | + | |
- | Sectorsize: 512 | + | |
- | Mode: r1w1e1 | + | |
- | State: ACTIVE | + | |
- | Priority: 0 | + | |
- | Flags: NONE | + | |
- | GenID: 0 | + | |
- | SyncID: 1 | + | |
- | ID: 2553232608 | + | |
- | 2. Name: ad1s1e | + | |
- | Mediasize: 1073439232 (1.0G) | + | |
- | Sectorsize: 512 | + | |
- | Mode: r1w1e1 | + | |
- | State: STALE | + | |
- | Priority: 100 | + | |
- | Flags: SYNCHRONIZING | + | |
- | GenID: 0 | + | |
- | SyncID: 1 | + | |
- | ID: 1755782325 | + | |
- | [gate1:~] # gmirror rebuild gm0 ad1s1e | + | [gate1:~] # tail -f /var/log/messages |
+ | </code> | ||
+ | ===== Смена ролей узлов кластера ===== | ||
+ | |||
+ | gate1 - бывший мастер, теперь бекап | ||
+ | |||
+ | gate2 - бывший бекап, теперь мастер | ||
+ | |||
+ | <code> | ||
+ | [gate1:~] # umount /opt | ||
[gate1:~] # gmirror status | [gate1:~] # gmirror status | ||
- | Name Status Components | + | [gate1:~] # gmirror deactivate gm0 ggate0 |
- | mirror/gm0 DEGRADED ggate0 | + | [gate1:~] # gmirror deactivate gm0 ad1s1e |
- | ad1s1e (1%) | + | [gate1:~] # gmirror unload |
+ | [gate1:~] # ggatec list | ||
+ | [gate1:~] # ggatec destroy -u 0 | ||
+ | [gate1:~] # killall -9 ggatec | ||
+ | [gate1:~] # ggated | ||
+ | |||
+ | [gate2:~] # killall ggated | ||
+ | [gate2:~] # gmirror load | ||
+ | [gate2:~] # gmirror label -v gm0 /dev/ad1s1e | ||
+ | [gate2:~] # gmirror status | ||
+ | [gate2:~] # fsck -y -t ufs /dev/mirror/gm0 | ||
+ | [gate2:~] # mount /dev/mirror/gm0 /opt | ||
+ | [gate2:~] # ggatec create -t 10 -u 0 slave /dev/ad1s1e | ||
+ | [gate2:~] # ggatec list | ||
+ | [gate2:~] # gmirror insert gm0 ggate0 | ||
</code> | </code> | ||
+ | |||
+ | ===== Остановка заркалирования ===== | ||
+ | <code> | ||
+ | [gate2:~] # umount /opt | ||
+ | [gate2:~] # gmirror status | ||
+ | [gate2:~] # gmirror deactivate gm0 ggate0 | ||
+ | [gate2:~] # gmirror deactivate gm0 ad1s1e | ||
+ | [gate2:~] # gmirror unload | ||
+ | </code> | ||
+ |