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<div style="direction: ltr;font-family: Tahoma;color: #000000;font-size: 10pt;">Hi Chen, see inline.<br>
<div style="font-family: Times New Roman; color: #000000; font-size: 16px">
<hr tabindex="-1">
<div id="divRpF719062" style="direction: ltr;"><font size="2" face="Tahoma" color="#000000"><b>From:</b> Chen, Haochuan Z [haochuan.z.chen@intel.com]<br>
<b>Sent:</b> Tuesday, December 17, 2019 10:46 AM<br>
<b>To:</b> Church, Robert; Poncea, Ovidiu<br>
<b>Cc:</b> 'starlingx-discuss@lists.starlingx.io'<br>
<b>Subject:</b> question about ceph or storage<br>
</font><br>
</div>
<div></div>
<div>
<div class="WordSection1">
<p class="MsoNormal">Hi Bob & Ovidiu</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">Some question about ceph or storage.</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">1, What’s storage tier and storage profile? What’s the <font color="FF0000">
<br>
</font></p>
<p class="MsoNormal"><font color="FF0000">[Ovi] Storage tiering is equivalent with this:
<a href="https://ceph.io/planet/deploying-ceph-with-storage-tiering/" target="_blank">
https://ceph.io/planet/deploying-ceph-with-storage-tiering/</a> .</font></p>
<p class="MsoNormal"><font color="FF0000">[Ovi] Profiles are managed by system storprofile-* and system host-apply-profile and are used to copy configuration from one node to another, identical node on initial provisioning. These profiles are only in system
inventory, there is no Ceph equivalent.<br>
</font></p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">2, why for duplex it request such puppet class dependency in ceph.pp? Is this request make all drbd config before class ceph?
<font color="FF0000">[Ovi] ceph-mon in AIO-DX is DRBD managed and it has a single, floating, monitor. On DX, when you swact, the monitor is stopped on the active controller and started on the standby controller.</font><br>
</p>
<p class="MsoNormal"> Drbd::Resource <| |> -> Class['::ceph']</p>
<p class="MsoNormal"> And flag file “.node_ceph_configured”, to inform drbd make init setup before ceph config?</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">3, To launch ceph-mon, create a logical volume “ceph-mon-lv” and mount to /var/lib/ceph/mon, not directly mkdir “/var/lib/ceph/mon” for ceph-mon<font color="FF0000"> [Ovi] Ceph monitors have their own logical volume. They are managed through
"system ceph-mon*" commands.<br>
</font></p>
<font color="FF0000"></font>
<p class="MsoNormal"><font color="FF0000"> </font></p>
<p class="MsoNormal">Thanks!</p>
<p class="MsoNormal"> </p>
<div>
<p class="MsoNormal">Martin, Chen</p>
<p class="MsoNormal">SSP, Software Engineer</p>
<p class="MsoNormal">021-61164330</p>
</div>
<p class="MsoNormal"> </p>
<div>
<div style="border:none; border-top:solid #E1E1E1 1.0pt; padding:3.0pt 0in 0in 0in">
<p class="MsoNormal"><a name="_____replyseparator"></a><b>From:</b> Chen, Haochuan Z
<br>
<b>Sent:</b> Wednesday, December 11, 2019 4:46 PM<br>
<b>To:</b> Church, Robert <Robert.Church@windriver.com><br>
<b>Cc:</b> 'starlingx-discuss@lists.starlingx.io' <starlingx-discuss@lists.starlingx.io>; Poncea, Ovidiu <Ovidiu.Poncea@windriver.com>; Qi, Mingyuan <mingyuan.qi@intel.com><br>
<b>Subject:</b> RE: ceph ops enabling in sysinv-conductor</p>
</div>
</div>
<p class="MsoNormal"> </p>
<p class="MsoNormal">Hi Bob</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">Some question, what’s storage tier and storage profile? As you said, we no longer manage pool and pg num, is this also unnecessary and we should remove it?</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">BR!</p>
<p class="MsoNormal"> </p>
<div>
<p class="MsoNormal">Martin, Chen</p>
<p class="MsoNormal">SSP, Software Engineer</p>
<p class="MsoNormal">021-61164330</p>
</div>
<p class="MsoNormal"> </p>
<div>
<div style="border:none; border-top:solid #E1E1E1 1.0pt; padding:3.0pt 0in 0in 0in">
<p class="MsoNormal"><b>From:</b> Church, Robert <<a href="mailto:Robert.Church@windriver.com" target="_blank" rel="noopener noreferrer">Robert.Church@windriver.com</a>>
<br>
<b>Sent:</b> Wednesday, December 4, 2019 12:09 AM<br>
<b>To:</b> Chen, Haochuan Z <<a href="mailto:haochuan.z.chen@intel.com" target="_blank" rel="noopener noreferrer">haochuan.z.chen@intel.com</a>><br>
<b>Cc:</b> 'starlingx-discuss@lists.starlingx.io' <<a href="mailto:starlingx-discuss@lists.starlingx.io" target="_blank" rel="noopener noreferrer">starlingx-discuss@lists.starlingx.io</a>>; Poncea, Ovidiu <<a href="mailto:Ovidiu.Poncea@windriver.com" target="_blank" rel="noopener noreferrer">Ovidiu.Poncea@windriver.com</a>><br>
<b>Subject:</b> Re: ceph ops enabling in sysinv-conductor</p>
</div>
</div>
<p class="MsoNormal"> </p>
<p class="MsoNormal">See inline…</p>
<p class="MsoNormal"> </p>
<div style="border:none; border-top:solid #B5C4DF 1.0pt; padding:3.0pt 0in 0in 0in">
<p class="MsoNormal"><b><span style="font-size:12.0pt; color:black">From: </span>
</b><span style="font-size:12.0pt; color:black">"Chen, Haochuan Z" <<a href="mailto:haochuan.z.chen@intel.com" target="_blank" rel="noopener noreferrer">haochuan.z.chen@intel.com</a>><br>
<b>Date: </b>Tuesday, December 3, 2019 at 2:18 AM<br>
<b>To: </b>Robert Church <<a href="mailto:Robert.Church@windriver.com" target="_blank" rel="noopener noreferrer">Robert.Church@windriver.com</a>><br>
<b>Cc: </b>"'starlingx-discuss@lists.starlingx.io'" <<a href="mailto:starlingx-discuss@lists.starlingx.io" target="_blank" rel="noopener noreferrer">starlingx-discuss@lists.starlingx.io</a>>, Ovidiu Poncea <<a href="mailto:Ovidiu.Poncea@windriver.com" target="_blank" rel="noopener noreferrer">Ovidiu.Poncea@windriver.com</a>><br>
<b>Subject: </b>RE: ceph ops enabling in sysinv-conductor</span></p>
</div>
<div>
<p class="MsoNormal"> </p>
</div>
<p class="MsoNormal">Hi Bob</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">1, we could update default pg num in sysinv/helm/rbd_provisioner.py. But when platform-integ-apps applied, maybe user has not add osded, so the default pg num is still for user reference.</p>
<p class="MsoNormal">And for user override, I think it should add in ceph-pool-audit, stx-platform-helm/helm-charts/ceph-pools-audit/templates/job-ceph-pools-audit.yaml. but pg num update will make rebalance which cause management network jam.</p>
<p class="MsoNormal">[RTC] For a more robust solution, consider the following:</p>
<ul style="margin-top:0in" type="disc">
<li class="MsoListParagraph" style="margin-left:-15.75pt">We can update _met_app_apply_prerequisites () in sysinv/conductor.py for platform-integ-apps to require OSDs to be provisioned prior to applying the application. This will ensure an accurate OSD view
when the application is initially applied.</li><li class="MsoListParagraph" style="margin-left:-15.75pt">The provisioner system overrides (in sysinv/helm/rbd_provisioner.py) should have the ability to calculate and set an optimal PG number to avoid generating a warning.
</li><li class="MsoListParagraph" style="margin-left:-15.75pt">The rbd provisioner chart should also support setting a new chunk size (if greater than the existing size) to update the PG num. This will support user PG updates from the helm-overrides API.</li><li class="MsoListParagraph" style="margin-left:-15.75pt">I think it’s potentially a good idea for ceph-pool-audit to support adjusting the PG numbers as well but this is tricky as I don’t think we can reduce PG_num in Mimic without creating a new pool and
copying the contents (pg_autoscaling is added in Nautilis). This audit code would have to be very specific in adjusting the PG num as installing applications that add additional pools will change the PG_num distribution.</li></ul>
<p class="MsoNormal"> </p>
<p class="MsoNormal">2, the above case is only for system application. Any more alarm for PG number, request user should manage.</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">BR!</p>
<p class="MsoNormal"> </p>
<div>
<p class="MsoNormal">Martin, Chen</p>
<p class="MsoNormal">SSP, Software Engineer</p>
<p class="MsoNormal">021-61164330</p>
</div>
<p class="MsoNormal"> </p>
<div>
<div style="border:none; border-top:solid #E1E1E1 1.0pt; padding:3.0pt 0in 0in 0in">
<p class="MsoNormal"><b>From:</b> Church, Robert <<a href="mailto:Robert.Church@windriver.com" target="_blank" rel="noopener noreferrer">Robert.Church@windriver.com</a>>
<br>
<b>Sent:</b> Tuesday, December 3, 2019 10:34 AM<br>
<b>To:</b> Chen, Haochuan Z <<a href="mailto:haochuan.z.chen@intel.com" target="_blank" rel="noopener noreferrer">haochuan.z.chen@intel.com</a>><br>
<b>Cc:</b> 'starlingx-discuss@lists.starlingx.io' <<a href="mailto:starlingx-discuss@lists.starlingx.io" target="_blank" rel="noopener noreferrer">starlingx-discuss@lists.starlingx.io</a>>; Poncea, Ovidiu <<a href="mailto:Ovidiu.Poncea@windriver.com" target="_blank" rel="noopener noreferrer">Ovidiu.Poncea@windriver.com</a>><br>
<b>Subject:</b> Re: ceph ops enabling in sysinv-conductor</p>
</div>
</div>
<p class="MsoNormal"> </p>
<p class="MsoNormal">Hi Martin,</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">In STX 1.0, we ran bare-metal openstack services for which we created and managed specific ceph storage pools for glance, cinder, nova, and swift. In this environment, we managed their creation and parameters (PGs and quotas) as the cluster
scaled up.</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">With the move to containerizing the openstack services in STX 2.0, pool creation is now driven mostly by helm charts packaged into an application (radosgw pools are the exception). Since we don’t know what additional application(s) will
be deployed and what pools may be created, we are currently longer managing pools as in STX 1.0.
</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">These related functions in sysinv/conductor/ceph.py are remaining from STX 1.0 and need to be removed and/or repurposed to meet any new requirements.
</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">I took a look at the LP logs and it looks like we only have a single application applied: platform-integ-apps. This currently results in a single pool for 6 OSDs</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal"> cluster:</p>
<p class="MsoNormal"> id: 6231df84-33be-4aa4-82ea-7408e0f2421c</p>
<p class="MsoNormal"> health: HEALTH_WARN</p>
<p class="MsoNormal"> <span style="background:yellow">too few PGs per OSD (21 < min 30)</span></p>
<p class="MsoNormal"> </p>
<p class="MsoNormal"> services:</p>
<p class="MsoNormal"> mon: 3 daemons, quorum controller-0,controller-1,storage-0</p>
<p class="MsoNormal"> mgr: controller-0(active), standbys: controller-1</p>
<p class="MsoNormal"> <span style="background:yellow">osd: 6 osds: 6 up, 6 in</span></p>
<p class="MsoNormal"> </p>
<p class="MsoNormal"> data:</p>
<p class="MsoNormal"> pools: 1 pools, 64 pgs</p>
<p class="MsoNormal"> objects: 0 objects, 0 B</p>
<p class="MsoNormal"> usage: 645 MiB used, 5.4 TiB / 5.4 TiB avail</p>
<p class="MsoNormal"> pgs: 64 active+clean</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">Since every installation will install platform-integ-apps, I think we should do the following:</p>
<ol style="margin-top:0in" type="1" start="1">
<li class="MsoListParagraph" style="margin-left:-15.75pt">Update the chunk_size calculation in sysinv/helm/rbd_provisioner.py to be dynamically calculated based on the number OSDs provisioned in the cluster. As this may be the only pool created, it should meet
the minimum size characteristics to avoid a ceph warning.</li><li class="MsoListParagraph" style="margin-left:-15.75pt">Update the rbd-provisioner helm chart to support explicitly setting the pg_num based on the chunk size. Do this to allow setting a user override for the chunk size so that we can re-apply platform-integ-apps
and explicitly set new values. </li></ol>
<p class="MsoNormal"> </p>
<p class="MsoNormal">Regards,</p>
<p class="MsoNormal">Bob</p>
<p class="MsoNormal"> </p>
<div style="border:none; border-top:solid #B5C4DF 1.0pt; padding:3.0pt 0in 0in 0in">
<p class="MsoNormal"><b><span style="font-size:12.0pt; color:black">From: </span>
</b><span style="font-size:12.0pt; color:black">"Chen, Haochuan Z" <<a href="mailto:haochuan.z.chen@intel.com" target="_blank" rel="noopener noreferrer">haochuan.z.chen@intel.com</a>><br>
<b>Date: </b>Monday, December 2, 2019 at 1:15 AM<br>
<b>To: </b>Robert Church <<a href="mailto:Robert.Church@windriver.com" target="_blank" rel="noopener noreferrer">Robert.Church@windriver.com</a>><br>
<b>Cc: </b>"'starlingx-discuss@lists.starlingx.io'" <<a href="mailto:starlingx-discuss@lists.starlingx.io" target="_blank" rel="noopener noreferrer">starlingx-discuss@lists.starlingx.io</a>>, Ovidiu Poncea <<a href="mailto:Ovidiu.Poncea@windriver.com" target="_blank" rel="noopener noreferrer">Ovidiu.Poncea@windriver.com</a>><br>
<b>Subject: </b>ceph ops enabling in sysinv-conductor</span></p>
</div>
<div>
<p class="MsoNormal"> </p>
</div>
<p class="MsoNormal">Hi Bob</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">I find some many function in sysinv-conductor/ceph.py, which could manage ceph cluster, such as create/delete/configure pool, audit pg etc.</p>
<p class="MsoNormal">But why these function is not enabled? Or plan to request user to manage ceph cluster, such as create pool and configure pg num?</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">Now I checked this issue, pg too few, as user maybe deploy few osd, which make alarm. So for such issue, request user to decide correct pg num or user could ignore?</p>
<p class="MsoNormal"><a href="https://bugs.launchpad.net/starlingx/+bug/1844164" target="_blank" rel="noopener noreferrer">https://bugs.launchpad.net/starlingx/+bug/1844164</a></p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">BR!</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">Martin, Chen</p>
<p class="MsoNormal">SSP, Software Engineer</p>
<p class="MsoNormal">021-61164330</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal"> </p>
<p class="MsoNormal"> </p>
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