<div dir="ltr">See inline, Susanne<br><div class="gmail_extra"><br><br><div class="gmail_quote">On Wed, Apr 9, 2014 at 4:49 PM, Jorge Miramontes <span dir="ltr"><<a href="mailto:jorge.miramontes@rackspace.com" target="_blank">jorge.miramontes@rackspace.com</a>></span> wrote:<br>
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<div>Answers inlined. Thanks for the questions! They forced me to think about certain features.</div>
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<div>Cheers,</div>
<div style="font-family:Calibri,sans-serif"><font color="#000000"><font face="Calibri">--Jorge</font></font></div>
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<span style="font-weight:bold">From: </span>Samuel Bercovici <<a href="mailto:SamuelB@Radware.com" target="_blank">SamuelB@Radware.com</a>><br>
<span style="font-weight:bold">Reply-To: </span>"OpenStack Development Mailing List (not for usage questions)" <<a href="mailto:openstack-dev@lists.openstack.org" target="_blank">openstack-dev@lists.openstack.org</a>><br>
<span style="font-weight:bold">Date: </span>Wednesday, April 9, 2014 6:10 AM<br>
<span style="font-weight:bold">To: </span>"OpenStack Development Mailing List (<a href="mailto:openstack-dev@lists.openstack.org" target="_blank">openstack-dev@lists.openstack.org</a>)" <<a href="mailto:openstack-dev@lists.openstack.org" target="_blank">openstack-dev@lists.openstack.org</a>><br>
<span style="font-weight:bold">Subject: </span>[openstack-dev] [Neutron][LBaaS]Clarification in regards to
<a href="https://docs.google.com/a/mirantis.com/spreadsheet/ccc?key=0Ar1FuMFYRhgadDVXZ25NM2NfbGtLTkR0TDFNUWJQUWc#gid=1" target="_blank">
https://docs.google.com/a/mirantis.com/spreadsheet/ccc?key=0Ar1FuMFYRhgadDVXZ25NM2NfbGtLTkR0TDFNUWJQUWc#gid=1</a><br>
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<p class="MsoNormal">Hi,<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">I have looked at <a href="https://docs.google.com/a/mirantis.com/spreadsheet/ccc?key=0Ar1FuMFYRhgadDVXZ25NM2NfbGtLTkR0TDFNUWJQUWc#gid=1" target="_blank">
https://docs.google.com/a/mirantis.com/spreadsheet/ccc?key=0Ar1FuMFYRhgadDVXZ25NM2NfbGtLTkR0TDFNUWJQUWc#gid=1</a> and have a few questions:<u></u><u></u></p>
<p><span>1.<span style="font:7.0pt "Times New Roman"">
</span></span><span dir="LTR"></span>Monitoring Tab:<u></u><u></u></p>
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<span>a.<span style="font:7.0pt "Times New Roman"">
</span></span><span dir="LTR"></span>Are there users that use load balancing who do not monitor members? Can you share the use cases where this makes sense?</p>
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<div><span style="white-space:pre-wrap"></span><font color="#ff0000">This is a good question. In our case we supply static ip addresses so some users have only one backend node. With one node
it isn't necessary. Another case I can think of is lbs that are being used for non-critical environments (i.e. dev or testing environment). For the most part it would make sense to have monitoring.</font></div><div class="">
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<span>b.<span style="font:7.0pt "Times New Roman"">
</span></span><span dir="LTR"></span>Does it make sense to define the different type of monitors (ex: TCP, HTTP HTTPS)?</p>
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</div><div style><span style="white-space:pre-wrap"></span><font color="#ff0000">Yes it does. Http monitoring, for example, allows you to monitor specific URI's. I just put
total utilization for all three to get some data out.</font></div><div class="">
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<span>c.<span style="font:7.0pt "Times New Roman"">
</span></span><span dir="LTR"></span>Does any existing cloud service besides the current implementation of the LBaaS API supports using multiple monitors on the same pool? Is this a required feature?</p>
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</div><div><span style="white-space:pre-wrap"></span><font color="#ff0000">I would think multiple monitors wouldn't make sense as they could potentially conflict. How would a decision be made in such a case?</font></div>
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<div lang="EN-US" link="blue" vlink="purple"><div><p><span>2.<span style="font:7.0pt "Times New Roman"">
</span></span><span dir="LTR"></span>Logging Tab:<u></u><u></u></p>
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<span>a.<span style="font:7.0pt "Times New Roman"">
</span></span><span dir="LTR"></span>What is logging use for?</p>
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</div><div><span style="white-space:pre-wrap"></span><font color="#ff0000">This is specifically connection logging. It allows the user to see all of the requests that went through the load balancer. It is mostly used for
big data and troubleshooting.</font></div><div class="">
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<span>b.<span style="font:7.0pt "Times New Roman"">
</span></span><span dir="LTR"></span>How does the tenant consume the logs?</p>
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</div><div><span style="white-space:pre-wrap"></span><font color="#ff0000">For our offering, we send their logs in a compressed format to swift. However, I am open to discussion on how to handle this in a more flexible manner.</font></div>
</div></blockquote><div><br></div><div>[Susanne] in our case logs are forwarded to a centralized logging system e.g. Logstash/Elastic Search/Kibana/etc.</div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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<p><span>3.<span style="font:7.0pt "Times New Roman"">
</span></span><span dir="LTR"></span>SSL Tab:<u></u><u></u></p>
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<span>a.<span style="font:7.0pt "Times New Roman"">
</span></span><span dir="LTR"></span>Please explain if SSL means passing SSL traffic through the load balancer or using the load balancer to terminate certificates.</p>
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</div><div><span style="white-space:pre-wrap"></span><font color="#ff0000">SSL termination. I updated the tab.</font></div><div class="">
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<span>b.<span style="font:7.0pt "Times New Roman"">
</span></span><span dir="LTR"></span>Does it make sense to separate those (SSL termination and non HTTPS terminated traffic) as different rows?</p>
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</div><div><span style="white-space:pre-wrap"></span><font color="#ff0000">Blue Box added a few extra rows. I identified lbs that terminate only secure traffic and lbs that allow both secure and insecure traffic.</font></div>
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<span>c.<span style="font:7.0pt "Times New Roman"">
</span></span><span dir="LTR"></span>Can anyone explain the use cases for SSL_MIXED?</p>
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</div><div><span style="white-space:pre-wrap"></span><font color="#ff0000">A lot of web sites have mixed content. The lb terminates the secure traffic. The insecure traffic passes through normally.</font></div><div class="">
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<p><span>4.<span style="font:7.0pt "Times New Roman"">
</span></span><span dir="LTR"></span>HA Tab:<u></u><u></u></p>
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<span>a.<span style="font:7.0pt "Times New Roman"">
</span></span><span dir="LTR"></span>Is this a tenant facing option or is it the way the operator chose to implement the service</p>
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</div><div><span style="white-space:pre-wrap"></span><font color="#ff0000">For us, this is operator implementation. However, since most lbs are considered mission critical almost all production users require HA. I could
see this being a toggable feature from the tenant side if they wanted to use a lb for testing or something non mission critical.</font></div></div></blockquote><div><br></div><div>[Susanne] Same for us. It is very important for use as service provider that the LB be resilient so the user doesn't have a choice. It is resilient by default. </div>
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<p><span>5.<span style="font:7.0pt "Times New Roman"">
</span></span><span dir="LTR"></span>Content Caching Tab:<u></u><u></u></p>
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<span>a.<span style="font:7.0pt "Times New Roman"">
</span></span><span dir="LTR"></span>Is this a load balancer feature or a CDN like feature.</p>
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</div><div><span style="white-space:pre-wrap"></span><font color="#ff0000">This is a lb feature. However, depending on the amount of content you'd like to cache using a CDN may be overkill. Here is a link that may shed some
light: <a href="http://www.rackspace.com/knowledge_center/article/content-caching-for-cloud-load-balancers" target="_blank">http://www.rackspace.com/knowledge_center/article/content-caching-for-cloud-load-balancers</a></font></div>
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<p><span>6.<span style="font:7.0pt "Times New Roman"">
</span></span><span dir="LTR"></span>L7<u></u><u></u></p>
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<span>a.<span style="font:7.0pt "Times New Roman"">
</span></span><span dir="LTR"></span>Does any cloud provider support L7 switching and L7 content modifications?</p>
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</div><div><span style="white-space:pre-wrap"></span><font color="#ff0000">We currently do not.</font></div></div></blockquote><div><br></div><div>[Susanne] we do not have that feature either. </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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<span>b.<span style="font:7.0pt "Times New Roman"">
</span></span><span dir="LTR"></span>If so can you please add a tab noting how much such features are used?</p>
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</div><div><span style="white-space:pre-wrap"></span><font color="#ff0000">N/A – Delegating to someone who actually has data.</font></div><div class="">
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<span>c.<span style="font:7.0pt "Times New Roman"">
</span></span><span dir="LTR"></span>If not, can anyone attest to whether this feature was requested by customers?</p>
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</div><div><span style="white-space:pre-wrap"></span><font color="#ff0000">Good question. I can see the use cases but operator data on this would be nice for those that have it. We have had a few requests but not enough
that would warrant development effort at this time. Hence, I would mark this priority low unless we can back it up with data.</font></div>
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<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">Thanks!<u></u><u></u></p>
<p class="MsoNormal"> -Sam.<u></u><u></u></p>
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