Answer:- The Filter Scheduler facilitates filtering and weighting to notify where a new instance can be created. It supports working with Compute Nodes. Filter Scheduler firstly creates an unfiltered dictionary of hosts and then filter them using related properties and makes the final selection of hosts for the number of instances as needed.

Answer:- • AvalabilityZoneFilter: filters hosts by their availability zone. • CapacityFilter: filtering based on volume host’s capacity consumption • DifferentBackendFilter: Scheduling volumes to a different back-end • DriverFilter: filters based on ‘filter function’ and ‘metrics’ • InstanceLocalityFilter • JSONFIlter • RetryFilter: Filter the previously attempted hosts • SameBackendFilterMost in-depth, industry-led curriculum in Openstack.

Answer:- • Networks • Routers • Subnets • Ports Vendor Plugins

Answer:- For all cloud computing paltforms, 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.

Answer:- • KVM (Kernel-based Virtual machine) • LXC: Linux Containers having Linux-based VMs • QEMU: Quick EMUlator used for development purposes • UML: User Mode Linux used for development purposes • VMware vSphere: VMware-based Linux and Windows via vCenter server connection. • Hyper-V: Server virtualization with Microsoft’s Hyper-V

Answer:- The three important components of OpenStack modular architecture are: • OpenStack Compute: For managing large networks on the virtual machine • Image Service: The delivery service provides discovery and registration for virtual disk images • OpenStack Object Storage: A storage system that provides support for both block storage and object storage

Answer:- nova floating-ip-*

Answer:- 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

Answer:- Nova (Compute) Cloud comprises following components: • API server • Message Queue (Rabbit-MQ Server) • Compute Workers (Nova-Compute) • Network controller (Nova-Network) • Volume Worker • Scheduler

Answer:- It provides an interface for the external world to interact with the cloud infrastructure.

Answer:- • ssh-keygen • cd .ssh • nova keypair-add –pub_key id_rsa.pub mykey

Answer:- Flavors are virtual hardware templates present in OpenStack, which define the memory sizes of RAM, hard disk, etc. Flavors illustrate a number of parameters like ID, Name, Memory_MB, Disk and others, giving a choice of Virtual Machine to the user just like having a physical server. OpenStack dashboard also allows users to modify a flavor by deleting the existing one and creating a new with the similar name and parameters.

Answer:- sudo nova-manage user create user-name

Answer:- By using the command sudo nova-manage user create user-name