OpenStack Victoria : Add Compute Nodes2021/08/31

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
+-----------+-----------+     +-----------+-----------+
|    [ Control Node ]   |     |    [ Compute Node ]   |
|                       |     |                       |
|  MariaDB    RabbitMQ  |     |        Libvirt        |
|  Memcached  httpd     |     |      Nova Compute     |
|  Keystone   Glance    |     |                       |
|  Nova API             |     |                       |
+-----------------------+     +-----------------------+

[1]	Install KVM Hypervisor on Compute Node, refer to here. It's unnecessarry to set Bridge networking on the section [2] of the link.
[2]	Install Nova-Compute. For questions duruing the installation, it's OK with [No] to all.

root@node01:~#

apt -y install nova-compute nova-compute-kvm qemu-system-data

# on Debian 11 default is set cgroup v2, however,

# specific feature does not work on Nova-Compute, so fall back to cgroup v1

root@node01:~#

vi /etc/default/grub

# line 10 : add

GRUB_DEFAULT=0
GRUB_TIMEOUT=5
GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian`
GRUB_CMDLINE_LINUX_DEFAULT="quiet"
GRUB_CMDLINE_LINUX="

systemd.unified_cgroup_hierarchy=false systemd.legacy_systemd_cgroup_controller=false

root@node01:~#

update-grub

root@node01:~#

reboot

[3]	Configure Nova.

root@node01:~#

mv /etc/nova/nova.conf /etc/nova/nova.conf.org

root@node01:~#

vi /etc/nova/nova.conf

# create new

[DEFAULT]
# define own IP address
my_ip = 10.0.0.51
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

# enable VNC
[vnc]
enabled = True
server_listen = 0.0.0.0
server_proxyclient_address = $my_ip
novncproxy_base_url = http://10.0.0.30:6080/vnc_auto.html

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

[oslo_concurrency]
lock_path = $state_path/tmp

# 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@node01:~#

chmod 640 /etc/nova/nova.conf

root@node01:~#

chgrp nova /etc/nova/nova.conf

root@node01:~#

systemctl restart nova-compute

[4]	Confirm the status of Nova services on Controle Node. 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                 |
+----+----------------+------------------+----------+---------+-------+----------------------------+
|  1 | nova-conductor | dlp.srv.world    | internal | enabled | up    | 2021-08-31T07:38:56.000000 |
|  3 | nova-scheduler | dlp.srv.world    | internal | enabled | up    | 2021-08-31T07:38:57.000000 |
|  8 | nova-compute   | dlp.srv.world    | nova     | enabled | up    | 2021-08-31T07:38:58.000000 |
|  9 | nova-compute   | node01.srv.world | nova     | enabled | up    | 2021-08-31T07:39:00.000000 |
+----+----------------+------------------+----------+---------+-------+----------------------------+

Matched Content