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Update git submodules 

* Update tacker from branch 'master'
  to 578b12e989876ab99effbb372fec9345de85bcf5
  - Add a seperate controller subnode to subdivide the memory load
    
    The number of required plugins has increased to the extent that
    controller on Zuul FT infrastructure almost runs out of memory [1].
    This potentially induces various problems such as FT failure noises
    or POST_FAILURE at the ansible task 'export-devstack-journal'.
    To request expanded images such as ubuntu-focal-expanded (16GB) or
    ubuntu-focal-32GB would be an option, but it turns out that would
    lead us to another problematic situation. [2]
    
    This patch, instead, addresses the issue by subdividing the memory
    load. As a first step, introduce a new subnode 'tacker-controller',
    on which both tacker-server and tacker-conductor are located.
    
    Note:
    * when we re-locate some other components to this new subnode, it might
      better to rename it.
    * `devstack_local_conf: {}` in .zuul.yaml is to cancel out the global
      job.vars devstack_local_conf.post-config.$NEUTRON_DHCP_CONF, which
      is not present on 'tacker-controller' in the first place.
    * TACKER_MODE is set to 'standalone'. 'all-in-one' supposes core
      services like nova, neutron, keystone, etc. api servers are located
      on the same host as tacker-server.
    * in devstack/lib/tacker:create_tacker_accounts, SERVICE_HOST should
      have been TACKER_HOST. this minor fix is included.
    * in roles/setup-default-vim/tasks/main.yaml, the same where conditions
      were scattered but all tasks in it just needed to run on 'controller'
      only. so let us wrap them all in a block.
    * renamed devstack/plugin.sh:tacker_register_default_vim for clarity.
    * policy file modification for Heat is now done by an ansible task.
      it frees us from the co-location requirements for Tacker and Heat.
    * drop devstack/lib/tacker:is_tacker_enabled as it's no longer needed.
    
    [1]: we investigated how severe the memory load on 'controller' was
         on Zuul FT infrastructure:
         * The highest memory-consuming processes in desc order:
           808.70MB (9.87%) 828112 /usr/sbin/mysqld
           179.81MB (2.19%) 184124 ... /usr/local/bin/tacker-server ...
           152.57MB (1.86%) 156232 ... /usr/local/bin/tacker-conductor .
           146.67MB (1.79%) 150188 ... /usr/local/bin/neutron-server ...
           132.96MB (1.62%) 136148 ... /usr/local/bin/neutron-server ...
           129.08MB (1.58%) 132180 ... /usr/local/bin/heat-engine ...
           127.48MB (1.56%) 130544 ... /usr/local/bin/heat-engine ...
           122.16MB (1.49%) 125092 nova-apiuWSGI worker 1
           121.00MB (1.48%) 123900 neutron-openvswitch-agent ...
           119.50MB (1.46%) 122368 cinder-apiuWSGI worker 1
           ---(snip)---
         * `free -m` output
                   total   used   free   shared   buff/cache   available
           Mem:     7955   7427    196       16          331         219
           Swap:    1022   1019      3
    
    [2]: http://eavesdrop.openstack.org/irclogs/%23openstack-infra/
         %23openstack-infra.2020-11-25.log.html
    
    Change-Id: I030ffd5fd11b7ca9abca56e85e449ed4c4d709bd
This commit is contained in:
Koichiro Den 2020-12-16 00:44:30 +09:00 committed by Gerrit Code Review
parent b2bead68d6
commit f37941b18f
1 changed files with 1 additions and 1 deletions
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2
tacker

@ -1 +1 @@
Subproject commit 6bbcad5af73063d18d12ccafaff57da73d58bac4
Subproject commit 578b12e989876ab99effbb372fec9345de85bcf5