How to create an Instance using OpenStack CLI

Table of contents

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Prerequisites:

For creating your OpenStack instance using CLI, you must have installed OpenStack in your system or your machine.

I have successfully installed my OpenStack and you can use this command to see all the information about OpenStack.

sudo snap info microstack

OpenStack Overview :

Instance source — It can be an image, block storage volume that contains an image or snapshot.
Instance name — The name for your instance.
Flavor — The flavor for your instance defines the vCPU and RAM memory limits for instance.
Security credentials — Use the credentials to create an instance:
- keypair — These are SSH credentials that are injected into images when they are launched. For the key pair to be successfully activated. you have already generated a key pair with an external tool. use this instance that belongs in this project.
- Security group — Defines incoming and outgoing network traffic from the instances. Security groups is a set of firewall policies, known as security group rules.
IP addresses — If the need, you can provide a public IP address to a running instance.

Create an instance:

Using some steps/commands to gather the parameters to launch an instance.

The available flavors:

create an instance in OpenStack firstly choose the available flavors list. So you can use this command to see the all available falvours list.

microstack.openstack flavor list

Images:

create an instance in OpenStack choose the available Images list. So you can use this command to see the all available images list.

microstack.openstack server list

Security groups:

Use this command to see all the available security groups list.

microstack.openstack security group list

Available key pairs:

Use this command to see all the available key pairs list.

microstack.openstack keypair list

Launch an instance:

Now create an Instance:

flavor — m1.large
image — ubuntu (e579edda-9972-450f-ac20-d5cb8d5f1d45)
keypair — microstack
security group — e9cd89d8-ffdd-4712-943e-f7a0ea1cefe1
Network Id — ea8d3e99-e555-4854-b461-b6824095898e
server name — User Choice

Run this command to create your instance:

microstack.openstack server create --flavor 4 --image e579edda-9972-450f-ac20-d5cb8d5f1d45  --key-name microstack  --security-group e9cd89d8-ffdd-4712-943e-f7a0ea1cefe1 --nic net-id=ea8d3e99-e555-4854-b461-b6824095898e                   myNewInstance