[ceph-users] ceph-users Digest, Vol 70, Issue 23

Robin H. Johnson robbat2 at gentoo.org
Sat Nov 24 21:46:57 PST 2018

On Sun, Nov 25, 2018 at 07:43:30AM +0700, Lazuardi Nasution wrote:
> Hi Robin,
> Do you mean that Cumulus quagga fork is FRRouting (https://frrouting.org/)?
> As long as I know Cumulus using it now.
I started this before Cumulus was fully shipping FRRouting; and used
their binaries.
Earlier versions of this:
Should be entirely possible w/ FRRouting now. VRFs as well for load
balancers is a huge help.

> What dummy interfaces do you mean?
modprobe dummy

> Why did you use it instead of loopback address?
Some applications (e.g. keepalived & BIRD) have hardcoded special
behavior for the 'lo' interface, with no easy way to work around that
behavior. Using Dummy prevents said special behavior. This isn't
directly relevant to Ceph itself, but matters on load balancers RGW
workloads for example.

> Anyway, how can you isolate between some kind of traffic to be not routable? 
> On L2 implementation, I separate two Ceph traffic (public and cluster)
> with other traffic by using VLANs.
In my past deployment, the cluster network was using IPv6 ULA addressing
to prevent leaks. QoS via DSCP as well to prioritize cluster traffic
over public traffic (Ceph already marks the heartbeat packets suitably).

Robin Hugh Johnson
Gentoo Linux: Dev, Infra Lead, Foundation Treasurer
E-Mail   : robbat2 at gentoo.org
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