OpenStack Interview Questions
sudo nova-manage user create user-name
By using the command sudo nova-manage user create user-name
Yes, by using keystone role-list
It provides an interface for the external world to interact with the cloud infrastructure.
nova keypair-add –pub_key id_rsa.pub mykey
Bare-metal node grants access to control bare-metal driver that handles the provisioning of OpenStack Compute physical hardware utilizing the standard cloud APIs and tools like Heat. It is generally used for single tenant clouds like high-performance cluster computing. For using the bare-metal driver, a network interface must be created with the bare-metal node inserted into it. Afterwards, users can launch an instance from the node. Users can also list and delete bare-metal nodes by removing the associated network instances.
Ports Vendor Plugins
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Hypervisor is a term to define virtual machine monitor (VMM) including hardware, software and firmware components running on a virtual machine. Host machine is the one having hypervisor with one or more virtual machines.
OpenStack Compute allows multiple hypervisors. There are functionalities to choose one among them for a specific purpose.
Token is a type of authentication similar to password-based validation. A token gets generated once the user inserts the credentials and authenticates as a Keystone user. The token can then be used to access OpenStack services without any revalidation. It is interesting to note that a token is active for a limited period and must be renewed after regular intervals.
To create a token, users first need to authenticate their Keystone credentials.
Python SDK (Software Development Kit) helps users to write applications for performing automation tasks in Python by calling Python objects. It provides a platform to work with multiple OpenStack services at one place. It consists of language bindings to access OpenStack clouds, complete API reference, easy interaction with REST API and sample code for initial applications.