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Configure an NFS storage back end

Reference:

Managing OpenStack, Using OpenStack Cli

Reference:

How to install OpenStackClient for Linux

Reference:

OpenStack Shared File Systems

https://docs.openstack.org/project-install-guide/shared-file-systems/newton/install-controller-rdo.html

Magnum Installation Guide

https://docs.openstack.org/magnum/2024.1/install/install-rdo.html

Install OpenStack client on AlmaLinux

Update Systems and installing Python and PIP

dnf update
dnf install python3.8 python3.8-pip -y
pip3 install --upgrade pip -y

Checking PIP version

pip3 --version

Installing OpenStack client pip3 install python-openstackclient

pip3 show python-openstackclient

Checking the OpenStack client version

source ~/.bashrc
openstack --version

Configuring the OpenStack client

nano ~/.keystonerc

Add the following lines:

unset OS_SERVICE_TOKEN
export OS_USERNAME='admin'
export OS_PASSWORD='adminpassword'
export OS_AUTH_URL=http://localhost:5000/v3
export PS1='[\u@\h \W(keystone_admin)]\$ '
export OS_PROJECT_NAME=admin
export OS_USER_DOMAIN_NAME=Default
export OS_PROJECT_DOMAIN_NAME=Default
export OS_IDENTITY_API_VERSION=3


source ~/.keystonerc

Verifying the OpenStack client installation

openstack server list
openstack network list
openstack image list

update the OpenStack client

pip3 install --upgrade python-openstackclient

How to uninstall the OpenStack client

#pip3 uninstall python-openstackclient

Manage OpenStack Services

openstack service list

Restart Nova services.

systemctl restart openstack-nova-compute

systemctl restart openstack-nova-api

systemctl restart openstack-nova-scheduler


. keystonerc_admin


openstack-status


openstack-service status


openstack-service start


openstack-service restart


openstack-service stop


systemctl status rabbitmq-server.service


systemctl start rabbitmq-server


systemctl restart openstack-nova-network


systemctl enable rabbitmq-server.service


systemctl restart rabbitmq-server.service


openstack-service status cinder

List the Compute services:

openstack compute service list

Disable a nova service:

openstack compute service set --disable --disable-reason "trial log" compute nova-compute

Enable the service:

openstack compute service set --enable compute nova-compute


systemctl start neutron-metadata-agent.service


systemctl enable neutron-metadata-agent.service


openstack-service status glance | column -t | grep active


openstack-service restart glance    -restart glance all 


systemctl status openstack-glance-api.service


service rabbitmq-server stop


service rabbitmq-server start


service openstack-nova-compute restart


#openstack-service list |xargs openstack-service disable


#openstack-service list |xargs openstack-service enable


#openstack-service list |xargs openstack-service stop


#openstack-service list |xargs openstack-service


#restart nova and nova-scheduler in all the compute node


systemctl restart openstack-nova-*


systemctl restart openstack-nova-scheduler.service


systemctl restart httpd
systemctl restart memcached


systemctl status openvswitch


systemctl restart openvswitch


systemctl start openvswitch libvirtd neutron-openvswitch-agent openstack-nova-compute 


systemctl restart openvswitch libvirtd neutron-openvswitch-agent openstack-nova-compute 


systemctl enable openvswitch libvirtd neutron-openvswitch-agent openstack-nova-compute 


systemctl restart openvswitch libvirtd neutron-openvswitch-agent openstack-nova-compute


systemctl start openstack-nova-compute openstack-neutron openstack-neutron-openvswitch


systemctl restart openstack-nova-compute openstack-neutron openstack-neutron-openvswitch


systemctl restart openstack* neutron* libvirtd


systemctl status openstack* neutron* libvirtd


systemctl restart neutron*


systemctl restart openstack-nova-compute.service

Reboot an Instance

Soft Reboot an Instance

openstack server reboot SERVER/ID

Hard Reboot an Instance

openstack server reboot --hard SERVER/ID

################

Integrade OpenStack Cinder with NFS Storage

dnf -y install nfs-utils


cat <<EOF | sudo tee /etc/idmapd.conf
Domain = paulco.xyz
EOF


systemctl status rpcbind
systemctl start rpcbind
systemctl enable rpcbind


cat <<EOF | sudo tee -a /etc/cinder/nfs_shares
192.168.0.96:/nfs-share
EOF


chown root:cinder /etc/cinder/nfs_shares
#chmod 0640 /etc/cinder/nfs_shares
chmod 777 /etc/cinder/nfs_shares
chgrp cinder /etc/cinder/nfs_shares
systemctl restart openstack-cinder-volume
#chown -R cinder. /var/lib/cinder/mnt


cat <<EOF | sudo tee -a /etc/cinder/cinder.conf
# add follows in [DEFAULT] section
enabled_backends = nfs
# add follows to the end
[nfs]
volume_driver = cinder.volume.drivers.nfs.NfsDriver
nfs_shares_config = /etc/cinder/nfs_shares
#nfs_mount_point_base = $state_path/mnt
EOF


service openstack-cinder-api restart
service openstack-cinder-backup restart
service openstack-cinder-scheduler restart
service openstack-cinder-volume restart


openstack-service status | grep -i cinder
service openstack-cinder-api status
service openstack-cinder-backup status
service openstack-cinder-scheduler status
service openstack-cinder-volume status

Deatch Volume of OpenStack Instance

openstack volume list

Example: openstack volume set --state available --detached cdd25f1a-f09c-43fb-bde4-a3c6e80d33b8

openstack volume set --state available --detached volume_id/volume_name


openstack availability zone list


openstack volume delete my-new-volume

Run a shell script at startup

dnf install crontabs -y


systemctl status crond.service
systemctl start crond.service
systemctl enable crond.service


chmod +x /home/user/startup.sh

Setup Jobs a crontab for it:

List of Crontab Jobs crontab -l

Adding/Edit jobs in Crontab

crontab -e
@reboot  /home/user/startup.sh

Adding a jobs in Crontab using CLI

crontab -e '*/5 * * * * /path/to/your/script.sh'


crontab -l | grep -v '^$' ; echo '@reboot /root/build-openstack.sh' | crontab -

Deleting an existing job/task in Crontab Delete all jobs/tasks

crontab -r

Remove the specific entry crontab -l | grep -v '' | crontab -

crontab -l | grep -v '* * * * * /usr/local/bin/download_weather.py' | crontab -

Install and Use Screen in Linux

dnf install screen -y
screen –version
screen -S Openstack
screen -ls
screen -r OpenStack/ID

Configure OpenStack Instances Autostart after reboot

Open Nova configuration file

nano /etc/nova/nova.conf

Add below line under the [DEFAULT] section:
By Default we find #resume_guests_state_on_host_boot = false (So, we need to make it Uncomment and True).

resume_guests_state_on_host_boot = true


sudo systemctl restart openstack-nova-compute