[Pulp-list] pulp3 High availability and disaster recovery

[Brian Bouterse]

Sorry for the late reply. Each component of Pulp itself can be deployed in
HA configurations. Of the services Pulp's processes depend on, Redis is the
one service that can't run as a full cluster because RQ doesn't support
that yet, so the best you can do is a hot-spare Redis that auto-fails over.
That isn't graceful failover so when traffic routes to your hot-spare Redis
it has to data and doesn't have the tasking system's data. Those Pulp tasks
would be cancelled, and Pulp would be immediately ready to accept new tasks
so they could be resubmitted, e.g. Katello resubmits some job failures I
believe.

More docs about this are here:
https://docs.pulpproject.org/components.html#architecture-and-deploying
More questions are welcome; sorry for the slow response. If you can see any
way to improve the docs and want to get involved, PRs are welcome!

-Brian


On Mon, Nov 18, 2019 at 7:37 AM JASON STELZER <jasonstelzer at boomi.com>
wrote:

> For what it is worth, at heart pulp3 is a django app. So, following the
> advice for HA and django apps generally works. A lot of it is driven by the
> particulars of your use case.
>
> My use case is a little different than yours I'm sure. But in terms of HA
> for now I'm good with a balancer and nodes in multiple azs, an RDS db with
> failover, and regular db backups.
>
> In my case, the pulp3 server is far enough behind the scenes that even if
> there were to be a several hour outage, the impact would be minimal. YMMV.
>
> Others can chime in with pulp3 specifics.
>
> On Fri, Nov 15, 2019 at 11:41 AM Bin Li (BLOOMBERG/ 120 PARK) <
> bli111 at bloomberg.net> wrote:
>
>> Does pulp3 support active/active or active/passive configuration? What is
>> the strategy to restore the pulp3 service on a different server if the
>> primary is down? Do we have any documentation on this topic?
>>
>> Thanks
>> _______________________________________________
>> Pulp-list mailing list
>> Pulp-list at redhat.com
>> https://www.redhat.com/mailman/listinfo/pulp-list
>
>
>
> --
> J.
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