‘nova service-list’ can‘t get the latest Updated_at time when using mc driver

[Tao Li]

Description
===========

When using mc driver(set servicegroup_driver=mc), the service reports state by memcache. but we use 'nova service-list' get the status of services reginster in nova, the 'update_at' time is not the last updated time not as db driver. so we should get the time in mecache to update the time in respone. The respone displays as follows.

[root@dfcontroller1 ~]# nova service-list
+-----+------------------+---------------+----------+---------+-------+----------------------------+-----------------+
| Id | Binary | Host | Zone | Status | State | Updated_at | Disabled Reason |
+-----+------------------+---------------+----------+---------+-------+----------------------------+-----------------+
| 157 | nova-scheduler | dfcontroller1 | internal | enabled | up | 2016-12-05T06:28:42.000000 | - |
| 161 | nova-scheduler | dfcontroller2 | internal | enabled | up | 2016-12-05T06:29:01.000000 | - |
| 163 | nova-conductor | dfcontroller1 | internal | enabled | up | 2016-12-05T06:28:39.000000 | - |
| 164 | nova-conductor | dfcontroller2 | internal | enabled | up | 2016-12-05T06:29:01.000000 | - |
| 187 | nova-consoleauth | dfcontroller1 | internal | enabled | up | 2016-12-05T06:28:46.000000 | - |
| 188 | nova-consoleauth | dfcontroller2 | internal | enabled | up | 2016-12-05T06:28:56.000000 | - |
| 194 | nova-rs | dfcontroller2 | internal | enabled | up | 2016-12-05T06:28:57.000000 | - |
| 197 | nova-haservice | dfcontroller2 | internal | enabled | up | 2016-12-05T06:29:02.000000 | - |
| 199 | nova-haservice | dfcontroller1 | internal | enabled | down | 2016-12-05T01:53:31.000000 | - |
| 202 | nova-rs | dfcontroller1 | internal | enabled | down | 2016-12-05T02:02:12.000000 | - |
| 205 | nova-compute | dfcompute1 | az_ip | enabled | up | 2016-12-05T06:29:00.000000 | - |
| 208 | nova-compute | dfcompute3 | az_ip | enabled | up | 2016-12-05T06:28:45.000000 | - |
| 211 | nova-compute | dfcompute2 | az_ip | enabled | up | 2016-12-05T06:29:03.000000 | - |
+-----+------------------+---------------+----------+---------+-------+----------------------------+-----------------+

Steps to reproduce
==================

1. modify the nova.conf file to set servicegroup_driver to mc。
2. restart nova-compute，nova-scheduler，nova-conductor，nova-consoleauth services。
3. wait for 10min or more， you'll watch the 'update_at' remians the same time.

Expected result
===============
The 'update_at' display the latest time as using db driver.

Actual result
=============
The 'update_at' remains not like using db driver.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/414463

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/414463
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=0df91a7f799060cd2e9b8a0adac1efacb974bcb3
Submitter: Jenkins
Branch: master

commit 0df91a7f799060cd2e9b8a0adac1efacb974bcb3
Author: Tao Li <[e-mail]>
Date: Fri Dec 23 10:35:01 2016 +0800

    Fix the display of updated_at time when using memcache driver.

    When using mc driver(set servicegroup_driver=mc), the service reports
    state by memcache. but we use 'nova service-list' get the status of
    services registered in nova, the 'update_at' time is not the last updated
    time not as db driver. so we should get the time in memcache to update the
    time in response.
    Closes-Bug: #1647269

    Change-Id: I1d4763436ad6de2483c39f5fe97fa6e8d283d8a3

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/nova 16.0.0.0b2 development milestone.