create instance does not work in devstack delpoy with minimum required conf file

[Jan Jasek]

In deployed openstack using steps from "https://docs.openstack.org/devstack/latest/" is not possible to create instance. After lot of hours there is still status "Build" and task "Spawning" (see in screenshot). It is probably due to local.conf (that is specified as a minimum required in manual):
[[local|localrc]]
ADMIN_PASSWORD=secret
DATABASE_PASSWORD=$ADMIN_PASSWORD
RABBIT_PASSWORD=$ADMIN_PASSWORD
SERVICE_PASSWORD=$ADMIN_PASSWORD

After trying different local.conf, everything works great:
[[local|localrc]]
disable_all_services
enable_service c-api
enable_service c-bak
enable_service c-sch
enable_service c-vol
disable_service dstat
enable_service etcd3
enable_service file_tracker
enable_service g-api
enable_service horizon
enable_service key
enable_service memory_tracker
enable_service mysql
enable_service n-api
enable_service n-api-meta
enable_service n-cond
enable_service n-cpu
enable_service n-novnc
enable_service n-sch
disable_service ovn-controller
disable_service ovn-northd
disable_service ovs-vswitchd
disable_service ovsdb-server
enable_service placement-api
enable_service q-agt
enable_service q-dhcp
enable_service q-l3
enable_service q-meta
enable_service q-metering
disable_service q-ovn-metadata-agent
enable_service q-svc
enable_service rabbit
enable_service s-account
enable_service s-container
enable_service s-object
enable_service s-proxy
enable_service tempest
enable_service tls-proxy
ADMIN_PASSWORD="secretadmin"
DATABASE_PASSWORD="secretdatabase"
DEBUG_LIBVIRT_COREDUMPS="True"
ENABLE_VOLUME_MULTIATTACH="True"
FORCE_CONFIG_DRIVE="True"
GLANCE_USE_IMPORT_WORKFLOW="True"
LIBVIRT_TYPE="qemu"
LOGFILE="/opt/stack/logs/devstacklog.txt"
LOG_COLOR="False"
NOVA_VNC_ENABLED="True"
NOVNC_FROM_PACKAGE="True"
OVN_DBS_LOG_LEVEL="dbg"
Q_AGENT="openvswitch"
Q_ML2_PLUGIN_MECHANISM_DRIVERS="openvswitch"
Q_ML2_TENANT_NETWORK_TYPE="vxlan"
RABBIT_PASSWORD="secretrabbit"
SERVICE_PASSWORD="secretservice"
SWIFT_HASH="1234123412341234"
SWIFT_REPLICAS="1"
SWIFT_START_ALL_SERVICES="False"
USE_PYTHON3="True"
VERBOSE="True"
VERBOSE_NO_TIMESTAMP="True"
LIBS_FROM_GIT=cinder,devstack,glance,horizon,keystone,neutron,nova,placement,requirements,swift,tempest
enable_plugin neutron https://opendev.org/openstack/neutron

[[post-config|$NEUTRON_CONF]]
[DEFAULT]
global_physnet_mtu = 1430
[[test-config|$TEMPEST_CONFIG]]
[compute]
min_compute_nodes = 1

I am not sure if it is a bug but few days ago the minimum required local.conf file worked great. So there is probably some issue or specified local.conf in steps on DevStack is no longer "minimum required".

[Martin Kopec (mkopec)]

Discussed today during office hour, see https://meetings.opendev.org/meetings/qa/2023/qa.2023-05-09-15.00.log.html#l-70

[Lukas Piwowarski (lukas-piwowarski)]

I tried the solution that ykarel (thanks!) proposed and it worked.

1) Changing the /etc/nova/nova-cpu.conf
[libvirt]
live_migration_uri = qemu+ssh://stack@%s/system
cpu_model = Nehalem
cpu_mode = custom
virt_type = qemu # kvm -> qemu

[workarounds]
ibvirt_disable_apic = True

2) Restarting n-cpu
sudo systemctl restart devstack@n-cpu

[Jan Jasek (johnnyjj)]

Hi guys, thank you, it helped!

I don't know where this problem came from (I did it every time the same way - by step by step from https://docs.openstack.org/devstack/latest/).
It would be nice to solve it. So that the steps in the devstack tutorial lead to a fully working environment.