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OSC OWL Lab "Stable": Openstack VM Creation

OSC OWL Lab "Stable": Openstack VM Creation

Introduction:

OSC Cosmos lab "stable" setup contains 3 machines,

More details about the servers can be found here.

Openstack installed on these machines. Openstack cli is accessible from srv8.osc.cosmos-lab.org.

Openstack credentials are stored in the /home/native/oscadmin-openrc.sh file on srv8.osc.cosmos-lab.org.

Depends on the quota configuration, any number of VMs can be created on these machines.

Steps to create a VM

  1. Load the Openstack credentials

source oscadmin-openrc.sh

  1. Download the ubuntu 22.04 image. (Any other image can be used as well, but this is the recommended one)

wget https://cloud-images.ubuntu.com/releases/jammy/release/ubuntu-22.04-server-cloudimg-amd64.img

  1. Create a new image in OpenStack

openstack image create <NAME_OF_THE_IMAGE> \ --disk-format qcow2 \ --container-format bare \ --file <NAME/LOCATION_OF_THE_CLOUD_IMG> \ --public # Example openstack image create "Ubuntu 22.04" \ --disk-format qcow2 \ --container-format bare \ --file ubuntu-22.04-server-cloudimg-amd64.img \ --public

  1. Verify the quota for the project
    Quota is the limit on the number of resources that can be created in OpenStack. You can check the quota for your project using,

openstack quota show

  1. Create a new flavour
    OpenStack flavours define the compute, memory, and storage capacity of virtual machines.

openstack flavor create <NAME_OF_THE_FLAVOUR> \ --vcpus <VCPU_CPU> \ --ram <RAM_SIZE_IN_MB> \ --disk <DISK_SIZE_IN_GB> # Example openstack flavor create m1.20cpu.100gb \ --vcpus 20 \ --ram 51200 \ --disk 100

  1. Create a network, subnet, and router

openstack network create <NETWORK_NAME> #Example openstack network create smo-lite-net
openstack subnet create <NAME_OF_THE_SUBNET> \ --network <NETWORK_NAME> \ --subnet-range <SUBNET_IP_RANGE> \ --gateway <GATEWAY_IP> \ --dns-nameserver <DNS_IP> #Example openstack subnet create smo-lite-subnet \ --network smo-lite-net \ --subnet-range 192.168.100.0/24 \ --gateway 192.168.100.1 \ --dns-nameserver 8.8.8.8
openstack router create <ROUTER_NAME> # Example openstack router create smo-lite-router
openstack router add subnet <ROUTER_NAME> <NAME_OF_THE_SUBNET> # Example openstack router add subnet smo-lite-router smo-lite-subnet

  1. Create a keypair for SSH access

ssh-keygen -t rsa -b 4096 -f ~/.ssh/<KEY_NAME> # Example ssh-keygen -t rsa -b 4096 -f ~/.ssh/smo-lite-key
openstack keypair create --public-key ~/.ssh/<KEY_NAME>.pub <KEY_NAME> # Example openstack keypair create --public-key ~/.ssh/smo-lite-key.pub smo-lite-key

  1. Create a security group for the VM instance
    Default security group is available in OpenStack, but it is recommended to create a new one for better control.

openstack security group create <NAME_OF_THE_SECURITY_GROUP> # Example openstack security group create smo-lite-security-group

  1. Create a VM instance using the created image, flavor, network, and keypair

openstack server create <NAME_OF_THE_SERVER> \ --image <NAME_OF_THE_IMAGE> \ --flavor <NAME_OF_THE_FLAVOUR> \ --network <NAME_OF_THE_NETWORK> \ --security-group <NAME_OF_THE_SECURITY_GROUP> \ --key-name <NAME_OF_THE_KEY> # Example openstack server create smo-lite-ubuntu22 \ --image "Ubuntu 22.04" \ --flavor m1.20cpu.100gb \ --network smo-lite-net \ --security-group c00f4925-4a82-4113-b431-92f648267cb6 \ --key-name smo-lite-key