OpenStack is a free, open standard cloud computing platform that hat uses pooled virtual resources to build and manage private and public clouds. Here we will be deploying OpenStack with an Ubuntu server for Lab purposes. Openstack controls large pools of compute, storage, and networking resources, all managed through APIs or a dashboard. Beyond standard infrastructure-as-a-service functionality, additional components provide orchestration, fault management, and service management amongst other services to ensure high availability of user applications.
In this tutorial, we willl be using 2 VMs (1 cluster node and 1 compute nodes)
Configuring Cluster Node.
Install Ubuntu and update packages (Please take note of the network settings and compute IP Address).
Then install Missing Packages
apt-get install git openssh-server (use sudo if not logged in as root)
We will use git to pull Openstack packages the configure the openstack user account that can sudo without password Authentication.
useradd -g stack -s /bin/bash -d /opt/stack -m stack
%stack ALL=(ALL) NOPASSWD: ALL
set the stack user account passwd
Now log out and log in as the user stack to test.
Next step is to configure ssh keys. To be able to access other nodes remotelt without the need to log in or authentication.
mkdir ~/.ssh; chmod 700 ~/.ssh
Pull Openstack via git
git clone https://git.openstack.org/openstack-dev/devstack
Do the above steps on all cluster nodes also.
Next is to configure all cluster nodes local DNS settings by mapping the hostnames to the IP address on each server.
cd to the devstack director on the controller node
and create the below files
vim stack.sh and add the line
for i in `seq 2 10`; do /opt/stack/nova/bin/nova-manage fixed reserve 10.0.0.$i; done
now execute the stack.sh script and wait
NOTE- this must be run as stack user and also change the owner of the devstack folder to the stack user
Got the error 'error cannot uninstall simplejson' during the instalation. To fix, do the following;
sudo apt purge python3-simplejson
pip install pyasn1-modules
Then execute the script again
Below is the Openstack login page
Now log in and access your dashboard
INSTALLING COMPUTE NODES
Now, OpenStack is installed, let’s configure and add compute nodes. Edit the following lines on the compute nodes x.
NOTE; You should have the stack user and openstack packages on the compute nodes before starting this process
touch local.conf nano local.conf
And set the following file as
[[local|localrc]] HOST_IP=172.18.14.218 # change this per compute node FLAT_INTERFACE=ens33 FIXED_RANGE=10.0.0.0/24 FIXED_NETWORK_SIZE=4096 FLOATING_RANGE=172.18.14.144/28 MULTI_HOST=1 LOGFILE=/opt/stack/logs/stack.sh.log ADMIN_PASSWORD=redhat DATABASE_PASSWORD=redhat RABBIT_PASSWORD=redhat SERVICE_PASSWORD=redhat DATABASE_TYPE=mysql SERVICE_HOST=172.18.14.219 MYSQL_HOST=$SERVICE_HOST RABBIT_HOST=$SERVICE_HOST GLANCE_HOSTPORT=$SERVICE_HOST:9292 ENABLED_SERVICES=n-cpu,n-net,n-api-meta,c-vol NOVA_VNC_ENABLED=True NOVNCPROXY_URL="http://$SERVICE_HOST:6080/vnc_auto.html" VNCSERVER_LISTEN=$HOST_IP VNCSERVER_PROXYCLIENT_ADDRESS=$VNCSERVER_LISTEN
Fill in your host and service IP address to match your servers.
cd /opt/stack/devstack ./stack.sh
Once completed, you now have more compute resources added to your cluster.