[osdcmy] SAN fencing

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[osdcmy] SAN fencing

Umarzuki Mochlis
hi,

have you guys done SAN fencing for cluster environment
(zimbra-cluster, drbd, rgmanager, cman) on CentOS 5?

any docs that i could refer to?

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Regards,

Umarzuki Mochlis
http://debmal.my

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Re: [osdcmy] SAN fencing

E A Faisal
Never done that. But I think a read on luci and ricci can help - at Red Hat doc - to do fencing.

On Wed, Feb 22, 2012 at 2:19 PM, Umarzuki Mochlis <[hidden email]> wrote:
hi,

have you guys done SAN fencing for cluster environment
(zimbra-cluster, drbd, rgmanager, cman) on CentOS 5?

any docs that i could refer to?

--
Regards,

Umarzuki Mochlis
http://debmal.my

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Re: [osdcmy] SAN fencing

Umarzuki Mochlis
Pada 22 Februari 2012 3:45 PTG, E A Faisal <[hidden email]> menulis:

> Never done that. But I think a read on luci and ricci can help - at Red Hat
> doc - to do fencing.
>
> On Wed, Feb 22, 2012 at 2:19 PM, Umarzuki Mochlis <[hidden email]>
> wrote:
>>
>> hi,
>>
>> have you guys done SAN fencing for cluster environment
>> (zimbra-cluster, drbd, rgmanager, cman) on CentOS 5?
>>
i don't know if SAN fencing is fiber channel switch fencing

http://www.centos.org/docs/4/4.5/SAC_Cluster_Suite_Overview/s2-fencing-overview-CSO.html#fig-fence-example-fc-CSO

i had tried using luci/Conga (via Clustering package group install)
and running ricci on every node but it is quite hard to do rather than
simply editing /etc/cluster/cluster.conf with vi and scp it to other
nodes, restart cman & rgmanager services

--
Regards,

Umarzuki Mochlis
http://debmal.my

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Re: [osdcmy] SAN fencing

Umarzuki Mochlis
Pada 22 Februari 2012 3:58 PTG, Umarzuki Mochlis <[hidden email]> menulis:
> http://www.centos.org/docs/4/4.5/SAC_Cluster_Suite_Overview/s2-fencing-overview-CSO.html#fig-fence-example-fc-CSO
>
> i had tried using luci/Conga (via Clustering package group install)
> and running ricci on every node but it is quite hard to do rather than
> simply editing /etc/cluster/cluster.conf with vi and scp it to other
> nodes, restart cman & rgmanager services
>

found this doc about scsi fencing, seems like what i want for my 2+1
nodes zimbra cluster setup (check capter 7)

http://docs.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/5/pdf/Configuration_Example_-_Fence_Devices/Red_Hat_Enterprise_Linux-5-Configuration_Example_-_Fence_Devices-en-US.pdf

but not sure if there's any gotchas with CentOS 5 & Zimbra NE 7.1.4

any experience to share?

--
Regards,

Umarzuki Mochlis
http://debmal.my

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Re: [osdcmy] SAN fencing

hisham keris
Umarzuki,

2 multiserver setup dengan 2 mailboxes ka?
Berapa user?

Pemilihan fencing penting, kalau boleh pilih yang script dah ada dan supported. Mesti kena pastikan ianya betul2 berjalan. Kalau tidak dikhuatiri data anda corrupt.

Pada pendapat aku, Multiserver zimbra atas rhcs tu ok dan supported, cuma masa nak upgrade nanti agak susah. Tambahan pulak 2+1 bukan 2+2 (memang la membazir). Nak support agak susah. 1 Standby server periksa 2 server/service berlainan.

Adalah elok dengan 3 physical server tersebut, virtualized kan di atas sekurang-kurangnya 2 physical server. Gunakan fungsi HA yang ada pada teknologi virtualization. Terpulang lah nak gunakan KVM atau XEN malah VMWare. Dengan cara ini kita buleh pecahkan lagi sebagai contoh untuk Zimbra tu dengan mengasingkan service seperti MTA dan lain-lain. Tambahan pulak, kita pun tak biarkan server ke 3 tak buat apa-apa. Takut lama tak pakai nanti "berkarat". Kita buleh gunakan sepenuhnya ketiga-tiga server dengan melarikan lebih dari 3 server. Mungkin buleh gunakan untuk development dan testing.

Mungkin melibatkan kos tambahan, tetapi sekurang-kurang nya kos menyokong dipindahkan kepada perisian yang dapat memberikan perkhidmatan terbaik yang kita mahukan.

Terima kasih, sekadar pendapat.
./hisham

On Wed, Feb 22, 2012 at 4:15 PM, Umarzuki Mochlis <[hidden email]> wrote:
Pada 22 Februari 2012 3:58 PTG, Umarzuki Mochlis <[hidden email]> menulis:
> http://www.centos.org/docs/4/4.5/SAC_Cluster_Suite_Overview/s2-fencing-overview-CSO.html#fig-fence-example-fc-CSO
>
> i had tried using luci/Conga (via Clustering package group install)
> and running ricci on every node but it is quite hard to do rather than
> simply editing /etc/cluster/cluster.conf with vi and scp it to other
> nodes, restart cman & rgmanager services
>

found this doc about scsi fencing, seems like what i want for my 2+1
nodes zimbra cluster setup (check capter 7)

http://docs.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/5/pdf/Configuration_Example_-_Fence_Devices/Red_Hat_Enterprise_Linux-5-Configuration_Example_-_Fence_Devices-en-US.pdf

but not sure if there's any gotchas with CentOS 5 & Zimbra NE 7.1.4

any experience to share?

--
Regards,

Umarzuki Mochlis
http://debmal.my

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