Hi,
Hopefully this is the right place to ask for guidance! I'm deploying
OpenStack/Swift in a development environment and intend to create/deploy
multiple Swift clusters with different hardware configurations underneath and
then do performance benchmarking. For example, I'm now building 2 clusters with
each 1+3 nodes (1 proxy + 3 storage nodes), one cluster with NL-SAS disks and
another with SAS disks. I also have a single-node 'cluster' up & running
already. I'm setting up the configuration of all these clusters in Puppet.
I plan to do the ring creation as follows (please correct me if I'm saying
weird or dumb things, I'm fairly new to Puppet):
In the Puppet declaration for each storage node, I think I should create the
ring_account_device resources and export them, something like this:
hiera('swift_devices').each |String $device| {
@@ring_account_device { "$backbone_ip:6002/$device":
zone => hiera('swift_zone'),
weight => hiera('swift_device_weight'),
}
}
Then on the proxy node (once for each cluster), I include the
swift::ringbuilder which collects these resources and creates the ring. At
least for the single-node cluster this works.
However, if I would create multiple clusters, how does Puppet know which
exported resources are intended for Cluster 1 (with NL-SAS disks) and which are
for Cluster 2 (with SAS disks)? Is this at all possible using Puppet? I fear
that if I deploy this, I will have 2 proxies which build a ring, each using all
servers/drives on each storage node.
Also, I don't fully understand why (in modules/swift/ringbuilder.pp), I see the
following:
Swift::Ringbuilder::Create['account'] -> Ring_account_device <| |> ~>
Swift::Ringbuilder::Rebalance['account']
Here, it looks to me like the Ring is built with resource collector
(Ring_account_device <| |>) , while the syntax to realize exported resources
should use double angle brackets (<<| |>>)if I understand correctly? What am I
missing/overlooking here? Should I run the ring builder on the storage nodes
instead, and are things then synced in some other way? (That makes little sense
to me...).
Can I make this work, and if so, how? Any help is greatly appreciated!
Happy holidays & kind regards,
Pieter van Wijngaarden
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