[Freeipa-devel] [PATCH] 879 Verify replication topology for a suffix

[Ludwig Krispenz]

On 06/17/2015 02:04 PM, Petr Vobornik wrote:
> With patch  "878 topology: check topology in ipa-replica-manage del" 
> we can use the same logic for POC of
>   ipa topologysuffix-verify
> command.
>
> Checks done:
>   1. check if the topology is not disconnected. In other words if
>      there are replication paths between all servers.
>   2. check if servers don't have more than a recommended number of
>      replication agreements (which was set to 4)
>
> I'm not sure what else we want to test but these two seemed as low 
> hanging fruit. 
don't know how hard it is, but I had thought of calculating something 
like a "degree of connectivity", eg to find single points of failure.
In a topology A <--> B <--> C <--> D, if B or C are down (temporariliy) 
the topology is disconnected. If extending to
A <--> B <--> C <--> D <--> A one server con be taken offline, so a 
brute force would be to check for each server if it could be removed

> Additional checks can be also added later.
>
> https://fedorahosted.org/freeipa/ticket/4302
>
>

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