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OpenStack Dalmatian : Add Compute Nodes2024/10/10

 

Add Compute Nodes to run more instances.

Following setting example is only for Nova Compute.
However, it also needs Network components for Compute Nodes, refer to follows for it.
Neutron with ML2 or Neutron with OVN

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  Nginx     |  |      Nova Compute     |
|  Keystone   httpd     |  |                       |
|  Glance     Nova API  |  |                       |
+-----------------------+  +-----------------------+

[1]

On new Compute Nodes, Set OpenStack Dalmatian repository, refer to here of [3].

[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 Dalmatian, EPEL, CRB

[root@node01 ~]#
dnf --enablerepo=centos-openstack-dalmatian,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

[oslo_policy]
enforce_new_defaults = true

[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-dalmatian -y install openstack-selinux

[root@node01 ~]#
vi lsmd.te
# create new

module lsmd 1.0;

require {
        type pasta_exec_t;
        type lsmd_t;
        class lnk_file getattr;
}

#============= lsmd_t ==============
allow lsmd_t pasta_exec_t:lnk_file getattr;

[root@node01 ~]#
checkmodule -m -M -o lsmd.mod lsmd.te

[root@node01 ~]#
semodule_package --outfile lsmd.pp --module lsmd.mod

[root@node01 ~]#
semodule -i lsmd.pp

[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                 |
+--------------------------------------+----------------+------------------+----------+---------+-------+----------------------------+
| de300d77-76e6-47c1-9015-ccffdfb1925c | nova-scheduler | dlp.srv.world    | internal | enabled | up    | 2024-10-10T00:47:28.000000 |
| e3f6d0c7-d55e-40c7-a466-5d52502a8c5f | nova-conductor | dlp.srv.world    | internal | enabled | up    | 2024-10-10T00:47:28.000000 |
| a2fa2107-090f-418e-9342-ac648a33e517 | nova-compute   | dlp.srv.world    | nova     | enabled | up    | 2024-10-10T00:47:28.000000 |
| be4d8b27-4e35-48f1-9861-1ab7502d66b5 | nova-compute   | node01.srv.world | nova     | enabled | up    | 2024-10-10T00:47:19.000000 |
+--------------------------------------+----------------+------------------+----------+---------+-------+----------------------------+
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