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OpenStack Yoga : Add Compute Nodes2022/06/09

 
Add Compute Nodes to run more instances.
This example is based on the environment like follows.
------------+-----------------------------+------------
            |                             |
        eth0|10.0.0.30                eth0|10.0.0.51
+-----------+-----------+     +-----------+-----------+
|   [ dlp.srv.world ]   |     |  [ node01.srv.world ] |
|     (Control Node)    |     |     (Compute Node)    |
|                       |     |                       |
|  MariaDB    RabbitMQ  |     |        Libvirt        |
|  Memcached  httpd     |     |      Nova Compute     |
|  Keystone   Glance    |     |                       |
|  Nova API             |     |                       |
+-----------------------+     +-----------------------+

[1]
[2]
On new Compute Nodes, Install KVM Hypervisor on Compute Node, refer to here.
It's unnecessary to set Bridge networking on the section [2] of the link.
[3] Install Nova-Compute.
# install from Yoga, EPEL, CRB

[root@node01 ~]#
dnf --enablerepo=centos-openstack-yoga,epel,crb -y install openstack-nova-compute
[4] Configure Nova.
[root@node01 ~]#
mv /etc/nova/nova.conf /etc/nova/nova.conf.org

[root@node01 ~]#
vi /etc/nova/nova.conf
# create new

[DEFAULT]
state_path = /var/lib/nova
enabled_apis = osapi_compute,metadata
log_dir = /var/log/nova
# RabbitMQ connection info
transport_url = rabbit://openstack:password@dlp.srv.world
compute_driver = libvirt.LibvirtDriver

[api]
auth_strategy = keystone

[vnc]
enabled = True
# IP address compute instances listen
# specify this node's IP
server_listen = 10.0.0.51
server_proxyclient_address = 10.0.0.51
novncproxy_base_url = https://dlp.srv.world:6080/vnc_auto.html

# Glance connection info
[glance]
api_servers = https://dlp.srv.world:9292

[oslo_concurrency]
lock_path = $state_path/tmp

# Keystone auth info
[keystone_authtoken]
www_authenticate_uri = https://dlp.srv.world:5000
auth_url = https://dlp.srv.world:5000
memcached_servers = dlp.srv.world:11211
auth_type = password
project_domain_name = default
user_domain_name = default
project_name = service
username = nova
password = servicepassword
# if using self-signed certs on httpd Keystone, turn to [true]
insecure = false

[placement]
auth_url = https://dlp.srv.world:5000
os_region_name = RegionOne
auth_type = password
project_domain_name = default
user_domain_name = default
project_name = service
username = placement
password = servicepassword
# if using self-signed certs on httpd Keystone, turn to [true]
insecure = false

[wsgi]
api_paste_config = /etc/nova/api-paste.ini

[root@node01 ~]#
chmod 640 /etc/nova/nova.conf

[root@node01 ~]#
chgrp nova /etc/nova/nova.conf

[5] If SELinux is enabled, change policy.
[root@node01 ~]#
dnf --enablerepo=centos-openstack-yoga -y install openstack-selinux

[6] If Firewalld is running, allow service ports.
[root@node01 ~]#
firewall-cmd --add-port=5900-5999/tcp

success
[root@node01 ~]#
firewall-cmd --runtime-to-permanent

success
[7] Start Nova Compute Service.
[root@node01 ~]#
systemctl enable --now openstack-nova-compute

[8] Verify the status of Nova services on Control Node like here. If all State is [up], they are running normally.
# discover Compute Nodes

[root@dlp ~(keystone)]#
su -s /bin/bash nova -c "nova-manage cell_v2 discover_hosts"
[root@dlp ~(keystone)]#
openstack compute service list

+--------------------------------------+----------------+------------------+----------+---------+-------+----------------------------+
| ID                                   | Binary         | Host             | Zone     | Status  | State | Updated At                 |
+--------------------------------------+----------------+------------------+----------+---------+-------+----------------------------+
| bded29ed-21f2-44df-8588-8f12ca820ad3 | nova-scheduler | dlp.srv.world    | internal | enabled | up    | 2022-06-09T02:06:02.000000 |
| 3a732634-770e-4aea-aa64-fa8e3130b8ba | nova-conductor | dlp.srv.world    | internal | enabled | up    | 2022-06-09T02:06:03.000000 |
| 53f7c9eb-a4ca-44e5-a775-f45f594a6493 | nova-compute   | dlp.srv.world    | nova     | enabled | up    | 2022-06-09T02:06:04.000000 |
| 556da5ea-2e08-4bb5-9e46-04c845d9ce60 | nova-compute   | node01.srv.world | nova     | enabled | up    | 2022-06-09T02:06:01.000000 |
+--------------------------------------+----------------+------------------+----------+---------+-------+----------------------------+
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