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[Openstack] unexpected distribution of compute instances in queens


On Mon, 2018-11-26 at 17:45 +0700, Zufar Dhiyaulhaq wrote:
> Hi,
> 
> I am deploying OpenStack with 3 compute node, but I am seeing an abnormal distribution of instance, the instance is
> only deployed in a specific compute node, and not distribute among other compute node. 
> 
> this is my nova.conf from the compute node. (template jinja2 based)

hi, the default behavior of nova used to be spread not pack and i belive it still is.
the default behavior with placement however is closer to a packing behavior as
allcoation candiates are retrunidn in an undefined but deterministic order.

on a busy cloud this does not strictly pack instaces but on a quite cloud it effectivly does

you can try and enable randomisation of the allocation candiates by setting this config option in 
the nova.conf of the shcduler to true.
https://docs.openstack.org/nova/latest/configuration/config.html#placement.randomize_allocation_candidates

on that note can you provide the nova.conf for the schduelr is used instead of the compute node nova.conf.
if you have not overriden any of the nova defaults the ram and cpu weigher should spread instances withing
the allocation candiates returned by placement.

> 
> [DEFAULT]
> osapi_compute_listen = {{ hostvars[inventory_hostname]['ansible_ens3f1']['ipv4']['address'] }}
> metadata_listen = {{ hostvars[inventory_hostname]['ansible_ens3f1']['ipv4']['address'] }}
> enabled_apis = osapi_compute,metadata
> transport_url = rabbit://openstack:{{ rabbitmq_pw }}@{{ controller1_ip_man }}:5672,openstack:{{ rabbitmq_pw }}@{{
> controller2_ip_man }}:5672,openstack:{{ rabbitmq_pw }}@{{ controller3_ip_man }}:5672
> my_ip = {{ hostvars[inventory_hostname]['ansible_ens3f1']['ipv4']['address'] }}
> use_neutron = True
> firewall_driver = nova.virt.firewall.NoopFirewallDriver
> [api]
> auth_strategy = keystone
> [api_database]
> connection = mysql+pymysql://nova:{{ nova_dbpw }}@{{ vip }}/nova_api
> [barbican]
> [cache]
> backend=oslo_cache.memcache_pool
> enabled=true
> memcache_servers={{ controller1_ip_man }}:11211,{{ controller2_ip_man }}:11211,{{ controller3_ip_man }}:11211
> [cells]
> [cinder]
> os_region_name = RegionOne
> [compute]
> [conductor]
> [console]
> [consoleauth]
> [cors]
> [crypto]
> [database]
> connection = mysql+pymysql://nova:{{ nova_dbpw }}@{{ vip }}/nova
> [devices]
> [ephemeral_storage_encryption]
> [filter_scheduler]
> [glance]
> api_servers = http://{{ vip }}:9292
> [guestfs]
> [healthcheck]
> [hyperv]
> [ironic]
> [key_manager]
> [keystone]
> [keystone_authtoken]
> auth_url = http://{{ vip }}:5000/v3
> memcached_servers = {{ controller1_ip_man }}:11211,{{ controller2_ip_man }}:11211,{{ controller3_ip_man }}:11211
> auth_type = password
> project_domain_name = default
> user_domain_name = default
> project_name = service
> username = nova
> password = {{ nova_pw }}
> [libvirt]
> [matchmaker_redis]
> [metrics]
> [mks]
> [neutron]
> url = http://{{ vip }}:9696
> auth_url = http://{{ vip }}:35357
> auth_type = password
> project_domain_name = default
> user_domain_name = default
> region_name = RegionOne
> project_name = service
> username = neutron
> password = {{ neutron_pw }}
> service_metadata_proxy = true
> metadata_proxy_shared_secret = {{ metadata_secret }}
> [notifications]
> [osapi_v21]
> [oslo_concurrency]
> lock_path = /var/lib/nova/tmp
> [oslo_messaging_amqp]
> [oslo_messaging_kafka]
> [oslo_messaging_notifications]
> [oslo_messaging_rabbit]
> [oslo_messaging_zmq]
> [oslo_middleware]
> [oslo_policy]
> [pci]
> [placement]
> os_region_name = RegionOne
> project_domain_name = Default
> project_name = service
> auth_type = password
> user_domain_name = Default
> auth_url = http://{{ vip }}:5000/v3
> username = placement
> password = {{ placement_pw }}
> [quota]
> [rdp]
> [remote_debug]
> [scheduler]
> discover_hosts_in_cells_interval = 300
> [serial_console]
> [service_user]
> [spice]
> [upgrade_levels]
> [vault]
> [vendordata_dynamic_auth]
> [vmware]
> [vnc]
> enabled = true
> keymap=en-us
> novncproxy_base_url = https://{{ vip }}:6080/vnc_auto.html
> novncproxy_host = {{ hostvars[inventory_hostname]['ansible_ens3f1']['ipv4']['address'] }}
> [workarounds]
> [wsgi]
> [xenserver]
> [xvp]
> [placement_database]
> connection=mysql+pymysql://nova:{{ nova_dbpw }}@{{ vip }}/nova_placement
> 
> what is the problem? I have lookup the openstack-nova-scheduler in the controller node but it's running well with only
> warning
> 
>  nova-scheduler[19255]: /usr/lib/python2.7/site-packages/oslo_db/sqlalchemy/enginefacade.py:332: NotSupportedWarning:
> Configuration option(s) ['use_tpool'] not supported
> 
> the result I want is the instance is distributed in all compute node.
> Thank you.
> 
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