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Bug 1341178 - nova-compute minimum memory
nova-compute minimum memory
Status: CLOSED ERRATA
Product: Red Hat OpenStack
Classification: Red Hat
Component: openstack-nova (Show other bugs)
8.0 (Liberty)
Unspecified Unspecified
low Severity low
: Upstream M3
: 13.0 (Queens)
Assigned To: Sven Anderson
Joe H. Rahme
: Triaged
Depends On:
Blocks:
  Show dependency tree / graph
 
Reported: 2016-05-31 08:20 EDT by Joe Talerico
Modified: 2018-06-27 09:26 EDT (History)
18 users (show)

See Also:
Fixed In Version: openstack-nova-17.0.0-0.20180123163703.27eadbc.el7ost openstack-tripleo-heat-templates-8.0.0-0.20180122224017.el7ost
Doc Type: If docs needed, set a value
Doc Text:
Story Points: ---
Clone Of:
Environment:
Last Closed: 2018-06-27 09:26:26 EDT
Type: Bug
Regression: ---
Mount Type: ---
Documentation: ---
CRM:
Verified Versions:
Category: ---
oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

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External Trackers
Tracker ID Priority Status Summary Last Updated
OpenStack gerrit 465100 None master: MERGED tripleo-heat-templates: Increase default for NovaReservedHostMemory to 4096 (Ic95984b62a748593992446271b197439fa12b376) 2018-02-07 09:02 EST
Red Hat Product Errata RHEA-2018:2086 normal SHIPPED_LIVE Red Hat OpenStack Platform 13.0 Enhancement Advisory 2018-06-28 15:51:39 EDT

  None (edit)
Description Joe Talerico 2016-05-31 08:20:39 EDT 
Description of problem:
Currently we suggest 6GB of RAM to be reserved just for OpenStack services on the compute nodes, however the host_reserved_memory_mb is set to 2048. To reflect what we put into documentation should we update both docs and nova.conf to be 4096, since 6GB seems a bit much.
Comment 3 Sven Anderson 2016-06-03 11:17:30 EDT 
Two questions here:

- This bug is about changing the default value of host_reserved_memory_mb only, not the documentation, which is in another ticket, right?

- we would like to change the default value in OSP director, not in nova itself. Is that what you were thinking of?
Comment 4 Joe Talerico 2016-06-06 10:35:51 EDT 
Sven - 
1) This is about changing the Documentation and the Default to reflect the same value. 

2) Correct - our THT would be where we change this (that is if we decide to change it). 

Right now we reserve 2GB, instead of the nova default (512MB).
Comment 5 Sven Anderson 2017-05-16 11:44:21 EDT 
Even in master this is still 2048. This bug is for OSP8. Is this actually a problem somewhere? To backport that upstream we would need an upstream bug as well. I'm happy to submit the changes, but wanna make sure it has sufficient priority.
Comment 6 Sven Anderson 2017-05-16 11:46:00 EDT 
Also could you provide a link to the documentation you are referring to? Thanks!
Comment 7 Joe Talerico 2017-05-16 20:21:38 EDT 
Sven - 
https://access.redhat.com/documentation/en-us/red_hat_openstack_platform/8/html/director_installation_and_usage/sect-overcloud_requirements

"
Memory
A minimum of 6 GB of RAM.
"

Then it states :

"
Add additional RAM to this requirement based on the amount of memory that you intend to make available to virtual machine instances.
"
Comment 8 Sven Anderson 2017-06-06 08:47:30 EDT 
Upstream changed got merged. Adding NEEDINFO for rhos-docs@redhat.com to take care of the documentation changes.
Comment 16 errata-xmlrpc 2018-06-27 09:26:26 EDT 
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHEA-2018:2086
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