[SSSD] [PATCH] Failover: try all servers if name resolution doesn't work

Pavel Březina pbrezina at redhat.com
Wed Aug 15 07:50:23 UTC 2012


On 08/14/2012 04:06 PM, Jakub Hrozek wrote:
> [PATCH 1/2] FO: Don't retry the same server if it's not working
> This is a regression (luckily in master only) caused by my earlier patch
> to return the same server if it's already being resolved, which is the
> case in IPA provider where we need to kinit as part of id lookup.
>
> I broke the case where we need to do a failover operation even between
> we returned the server to the backend, which is done if a server cannot
> be resolved and the be_fo_ layer queries failover for another.
>
> [PATCH 2/2] FO: Return EAGAIN if there are more servers to try
> The failover uses ENOENT to indicate that there are no more available
> servers and the provider needs to go offline. However, when the resolver
> returned ENOENT after failing to resolve a host name, we would just pass
> ENOENT up as-is. The net effect was that if a server could not be
> resolved, the whole provider went offline.

Ack.



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