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<p class="MsoNormal">Hi, <o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span lang="EN-US">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.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">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):<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">In the Puppet declaration for each storage node, I think I should create the ring_account_device resources and export them, something like this:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New"">hiera('swift_devices').each |String $device| {<o:p></o:p></span></p>
<p class="MsoNormal" style="text-indent:35.4pt;text-autospace:none"><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New"">@@ring_account_device { "$backbone_ip:6002/$device":<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:35.4pt;text-indent:35.4pt;text-autospace:none">
<span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New"">zone => hiera('swift_zone'),<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:35.4pt;text-indent:35.4pt;text-autospace:none">
<span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New"">weight => hiera('swift_device_weight'),<o:p></o:p></span></p>
<p class="MsoNormal" style="text-indent:35.4pt;text-autospace:none"><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New"">}<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New"">}<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Then on the proxy node (once for each cluster), I include the
</span><span lang="EN-US" style="font-family:"Courier New"">swift::ringbuilder</span><span lang="EN-US"> which collects these resources and creates the ring. At least for the single-node cluster this works.
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">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.
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Also, I don’t fully understand why (in modules/swift/ringbuilder.pp), I see the following:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New"">Swift::Ringbuilder::Create['account'] -> Ring_account_device <| |> ~> Swift::Ringbuilder::Rebalance['account']<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Here, it looks to me like the Ring is built with resource collector (</span><span lang="EN-US" style="font-family:"Courier New"">Ring_account_device <| |></span><span lang="EN-US">) , while the syntax to realize exported
resources should use double angle brackets </span><span lang="EN-US" style="font-family:"Courier New"">(<<| |>>)</span><span lang="EN-US">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…). <o:p>
</o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Can I make this work, and if so, how? Any help is greatly appreciated!<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Happy holidays & kind regards,</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;line-height:14.4pt;background:white">
<span style="mso-fareast-language:NL">Pieter van Wijngaarden<o:p></o:p></span></p>
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