Re: [Openqrm-user] HA and remote backup

[Matt R. <m.r...@t-...>]

Hi Arnold,

Arnold Siboro wrote:
> Sorry for newbie questions:
>
> Is it possible to have a highly available system, so that a backup
> node is located off-site (on a physically remote area) and when
> main node failed, the backup node is activated?
>   

yes, you mean "disaster recovery", right ?
> Here is the topology I am thinking:
>
> Main nodes are in location A.
> Backup nodes are in location B, physically remote from location A.
> Users are in location B. You can think of location A as datacenter,
> and location B is the office of users that use internal web services
> provided by this cloud. If location A is completely unreachable from
> location B, in order for switch over to happen, then I think openQRM
> needs to be located at location B, correct me if I am wrong.
>
> I am thinking of a web service, so it is possible in the above case
> to make the fail-over works seamlessly and the user continues
> accessing the web service as if nothing happened?
>
> openQRM uses DHCP for booting the nodes, how can a remote
> node boot because DHCP broadcast usually does not go over
> subnet boundaries?
>   
DHCP is only used for the management-network. External (public)
Ip-addresses of your services are bound to the server image.

Regarding your suggested setup :
- setup openQRM in HA mode in location A + B
- have strorage server for your server-image in A
- mirror the storage server in A to storage server in B

Now in case A goes down openQRM will bring up your services in location B

;) cool, eh ?

greetz + best,

Matt
>
>
>   


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