openstack/watcher
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Resource optimization service for OpenStack.
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Matt Riedemann 3f76f9cfdb Optimize hypervisor API calls 
The nova CDM builder code and notification handling
code had some inefficiencies when it came to looking
up a hypevisor to get details. The general pattern
used before was:

1. get the minimal hypervisor information by hypervisor_hostname
2. make another query to get the hypervisor details by id

In the notifications case, it was actually three calls because
the first is listing hyprvisors to filter client-side by service
host.

This change collapses 1 and 2 above into a single API call
to get the hypervisor by hypervisor_hostname with details
which will include the service (compute) host information
which is what get_compute_node_by_id() was being used for.
Now that nothing is using get_compute_node_by_id it is removed.

There is more work we could do in get_compute_node_by_hostname
if the compute API allowed filtering hypervisors by service
host so a TODO is left for that.

One final thing: the TODO in get_compute_node_by_hostname about
there being more than one hypervisor per compute service host
for vmware vcenter is not accurate - nova's vcenter driver
hasn't supported a host:node 1:M topology like that since the
Liberty release [1]. The only in-tree driver in nova that supports
1:M is the ironic baremetal driver, so the comment is updated.

[1] Ifc17c5049e3ed29c8dd130339207907b00433960

Depends-On: https://review.opendev.org/661785/
Change-Id: I5e0e88d7b2dd1a69117ab03e0e66851c687606da
2019-06-03 12:18:54 -04:00
api-ref/source Add force field to api-ref 2019-05-10 10:51:37 +08:00
devstack Use the common logging setup function in devstack runs 2019-05-07 13:26:37 -04:00
doc Require nova_client.api_version >= 2.56 2019-05-23 15:49:19 -04:00
etc Register default policies in code 2017-12-11 15:19:10 +03:00
playbooks/legacy/grenade-devstack-watcher OpenDev Migration Patch 2019-04-19 19:40:45 +00:00
rally-jobs Fix some dead link in docs 2018-02-14 16:45:13 +09:00
releasenotes Merge "Audit API supports new force option" 2019-05-29 10:01:04 +00:00
watcher Optimize hypervisor API calls 2019-06-03 12:18:54 -04:00
.coveragerc Loadable Cluster Data Model Collectors 2016-08-02 12:07:35 +02:00
.gitignore Update documentation regarding DataSource for strategies 2018-10-16 13:33:24 +03:00
.gitreview OpenDev Migration Patch 2019-04-19 19:40:45 +00:00
.mailmap initial version 2015-06-04 15:27:57 +02:00
.stestr.conf Switch to stestr 2018-07-10 15:38:50 +07:00
.zuul.yaml Add tempest voting 2019-04-30 16:02:32 +08:00
babel.cfg initial version 2015-06-04 15:27:57 +02:00
CONTRIBUTING.rst Optimize the link address 2017-04-07 10:55:59 +08:00
HACKING.rst Updated Hacking doc 2018-02-28 03:58:07 +00:00
LICENSE initial version 2015-06-04 15:27:57 +02:00
lower-constraints.txt Optimize hypervisor API calls 2019-06-03 12:18:54 -04:00
README.rst Drop use of git.openstack.org 2019-04-23 13:20:10 +02:00
requirements.txt Optimize hypervisor API calls 2019-06-03 12:18:54 -04:00
setup.cfg remove py35 2019-04-16 16:24:53 +08:00
setup.py Updated from global requirements 2017-03-07 02:08:03 +00:00
test-requirements.txt Fix bandit runs with 1.6.0 2019-05-09 11:14:40 -04:00
tox.ini Add doc/requirements.txt to venv tox target 2019-05-14 20:42:03 -04:00

README.rst

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Watcher

OpenStack Watcher provides a flexible and scalable resource optimization service for multi-tenant OpenStack-based clouds. Watcher provides a robust framework to realize a wide range of cloud optimization goals, including the reduction of data center operating costs, increased system performance via intelligent virtual machine migration, increased energy efficiency and more!