[Gluster-users] FailOver

[Punit Dambiwal]

Hi Vijay,

Thanks....is  "replace-brick commit force" also can possible through Ovirt
Admin Portal or do i need to use the command line to run this command ??

Also i am looking for HA for glusterfs...let me explain
my architecture more :-

1. I have 4 node glusterfs cluster....and same 4 nodes i am using as Ovirt
HV nodes (storage + compute).
2. Now if i mount it in Ovirt...it will mount on one node ip address....and
if this node goes down...all my VM will pause...
3. I want to use HA or LB through CTDB or HA proxy...so even any node goes
down the VM will not affect...
4. I am ready to put two additional node for HA/LB purpose.....

Please suggest me good way to achieve this....

On Mon, Oct 27, 2014 at 6:19 PM, Vijay Bellur <vbellur at redhat.com> wrote:

> On 10/23/2014 01:35 PM, Punit Dambiwal wrote:
>
>>     On Mon, Oct 13, 2014 at 11:54 AM, Punit Dambiwal <hypunit at gmail.com
>>     <mailto:hypunit at gmail.com>> wrote:
>>
>>         Hi,
>>
>>         I have one question regarding the gluster failover...let me
>>         explain my current architecture,i am using Ovirt with gluster...
>>
>>         1. One Ovirt Engine (Ovirt 3.4)
>>         2. 4 * Ovirt Node as well as Gluster storage node...with 12
>>         brick in one node...(Gluster Version 3.5)
>>         3. All 4 node in distributed replicated structure with replica
>>         level =2...
>>         4. I have one spare node with 12 brick for Failover purpose..
>>
>>         Now there is two questions :-
>>
>>         1. If any of brick failed...how i can failover this brick...how
>>         to remove the failed brick and replace with another brick....??
>>         Do i need to replace the whole node or i can replace the single
>>         brick ??
>>
>>
> Failure of a single brick can be addressed by performing "replace-brick
> commit force" to replace the failed brick with a new brick and then trigger
> self-heal to rebuild data on the replace brick.
>
>          2. If one of the whole node with 12 brick down and can not come
>>         up...how i can replace it with the new one....do i need to add
>>         two node to main the replication level... ??
>>
>>
> You can add a replacement node to the cluster and use "replace-brick
> commit force" to adjust the volume topology. Self-healing will rebuild data
> on the new node. You might want to replace one/few bricks at a time to
> ensure that your servers do not get bogged down by self-healing.
>
> -Vijay
>
>
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