Bug 1400030

Summary: HAProxy scaling guidelines.
Product: OpenShift Container Platform Reporter: Vladislav Walek <vwalek>
Component: DocumentationAssignee: Jiří Mencák <jmencak>
Status: CLOSED NOTABUG QA Contact: Vikram Goyal <vigoyal>
Severity: low Docs Contact: Vikram Goyal <vigoyal>
Priority: low    
Version: 3.3.0CC: aos-bugs, bperkins, jeder, jokerman, mmccomas, tstclair, vwalek, wmeng
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Hardware: Unspecified   
OS: Unspecified   
Whiteboard: aos-scalability-34
Fixed In Version: Doc Type: If docs needed, set a value
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Clone Of: Environment:
Last Closed: 2017-01-17 12:38:25 UTC Type: Bug
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description Vladislav Walek 2016-11-30 10:19:55 UTC 
Description of problem:

I want to just ask question, is there some guide how to scale the cluster based on input?
Like how big the cluster should be?

From customer:

"Please check the HAProxy for 400.000 parallel AMQPS connections (TCP based routing via sni headers) and also 400.000 parallel Web-Sockets HTTPS connections (Layer7).
Do you have information about how many connections this HAProxy in the master node could handle ?"

Thank you
Comment 3 Timothy St. Clair 2016-12-15 20:11:41 UTC 
@Vladislav - 

There exists some data, but your initial question is vague, and your example is quite specific.  So I'm slightly confused by what you are looking for?  Could you please elaborate in more detail your specific request. 

xref: https://docs.openshift.org/latest/install_config/install/planning.html
Comment 6 Jeremy Eder 2016-12-19 13:47:57 UTC 
Hi Vladislav,

As Tim said, haproxy scaling and performance tuning is in scope and underway.  Because it's a large area of research, we're taking a phased approach; making incremental progress with every minor release of OCP.

Jiri should reply soon to answer your last question about how many connections haproxy can handle in OCP.

The specific use-case for amqp and 400k connections I think is unfortunately outside of our current scope and ability to test.  That said, we will be continuing to push haproxy further and further as time goes on, and document architectural best-practices and tuning that is identified.
Comment 7 Vladislav Walek 2017-01-02 12:13:44 UTC 
Hello Jeremy,

thank you for reply. Customer is closing the attach case, so you can close the ticket.
Thank you