CentOS 8
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OpenStack Ussuri : Configure Nova #22020/06/08
 
Install OpenStack Compute Service (Nova).
This example is based on the environment like follows. 
        eth0|10.0.0.30 
+-----------+-----------+
|    [ Control Node ]   |
|                       |
|  MariaDB    RabbitMQ  |
|  Memcached  httpd     |
|  Keystone   Glance    |
|  Nova API             |
+-----------------------+
[1] Install Nova services.
# install from Ussuri, EPEL, powertools

[root@dlp ~(keystone)]#
dnf --enablerepo=centos-openstack-ussuri,powertools,epel -y install openstack-nova openstack-placement-api
[2] Configure Nova.
[root@dlp ~(keystone)]#
mv /etc/nova/nova.conf /etc/nova/nova.conf.org

[root@dlp ~(keystone)]#
vi /etc/nova/nova.conf
# create new

[DEFAULT]
# define own IP address
my_ip = 10.0.0.30
state_path = /var/lib/nova
enabled_apis = osapi_compute,metadata
log_dir = /var/log/nova
# RabbitMQ connection info
transport_url = rabbit://openstack:password@10.0.0.30

[api]
auth_strategy = keystone

# Glance connection info
[glance]
api_servers = http://10.0.0.30:9292

[oslo_concurrency]
lock_path = $state_path/tmp

# MariaDB connection info
[api_database]
connection = mysql+pymysql://nova:password@10.0.0.30/nova_api

[database]
connection = mysql+pymysql://nova:password@10.0.0.30/nova

# Keystone auth info
[keystone_authtoken]
www_authenticate_uri = http://10.0.0.30:5000
auth_url = http://10.0.0.30:5000
memcached_servers = 10.0.0.30:11211
auth_type = password
project_domain_name = default
user_domain_name = default
project_name = service
username = nova
password = servicepassword

[placement]
auth_url = http://10.0.0.30:5000
os_region_name = RegionOne
auth_type = password
project_domain_name = default
user_domain_name = default
project_name = service
username = placement
password = servicepassword

[wsgi]
api_paste_config = /etc/nova/api-paste.ini
[root@dlp ~(keystone)]#
chmod 640 /etc/nova/nova.conf

[root@dlp ~(keystone)]#
chgrp nova /etc/nova/nova.conf
[root@dlp ~(keystone)]#
mv /etc/placement/placement.conf /etc/placement/placement.conf.org

[root@dlp ~(keystone)]#
vi /etc/placement/placement.conf
# create new

[DEFAULT]
debug = false

[api]
auth_strategy = keystone

[keystone_authtoken]
www_authenticate_uri = http://10.0.0.30:5000
auth_url = http://10.0.0.30:5000
memcached_servers = 10.0.0.30:11211
auth_type = password
project_domain_name = default
user_domain_name = default
project_name = service
username = placement
password = servicepassword

[placement_database]
connection = mysql+pymysql://placement:password@10.0.0.30/placement
[root@dlp ~(keystone)]#
chmod 640 /etc/placement/placement.conf

[root@dlp ~(keystone)]#
chgrp placement /etc/placement/placement.conf
[root@dlp ~(keystone)]#
vi /etc/httpd/conf.d/00-placement-api.conf
# add near line 15

  <Directory /usr/bin>
    Require all granted
  </Directory>
</VirtualHost>
[3] If SELinux is enabled, change policy.
[root@dlp ~(keystone)]#
dnf --enablerepo=centos-openstack-ussuri -y install openstack-selinux

[root@dlp ~(keystone)]#
semanage port -a -t http_port_t -p tcp 8778

[4] If Firewalld is running, allow ports for services.
[root@dlp ~(keystone)]#
firewall-cmd --add-port={6080/tcp,6081/tcp,6082/tcp,8774/tcp,8775/tcp,8778/tcp} --permanent

success
[root@dlp ~(keystone)]#
firewall-cmd --reload

success
[5] Add Data into Database and start Nova services.
It doesn't need to care the messages "deprecated ***" when sync DB.
[root@dlp ~(keystone)]#
su -s /bin/bash placement -c "placement-manage db sync"
[root@dlp ~(keystone)]#
su -s /bin/bash nova -c "nova-manage api_db sync"
[root@dlp ~(keystone)]#
su -s /bin/bash nova -c "nova-manage cell_v2 map_cell0"
[root@dlp ~(keystone)]#
su -s /bin/bash nova -c "nova-manage db sync"
[root@dlp ~(keystone)]#
su -s /bin/bash nova -c "nova-manage cell_v2 create_cell --name cell1"
[root@dlp ~(keystone)]#
systemctl restart httpd

[root@dlp ~(keystone)]#
chown placement. /var/log/placement/placement-api.log
[root@dlp ~(keystone)]#
for service in api conductor scheduler novncproxy; do
systemctl enable --now openstack-nova-$service
done
# show status

[root@dlp ~(keystone)]#
openstack compute service list 

+----+----------------+---------------+----------+---------+-------+----------------------------+
| ID | Binary         | Host          | Zone     | Status  | State | Updated At                 |
+----+----------------+---------------+----------+---------+-------+----------------------------+
|  5 | nova-conductor | dlp.srv.world | internal | enabled | up    | 2020-06-04T17:00:25.000000 |
|  7 | nova-scheduler | dlp.srv.world | internal | enabled | up    | 2020-06-04T17:00:23.000000 |
+----+----------------+---------------+----------+---------+-------+----------------------------+
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