Interview Questions.

Question 1. Do Applications Which Will Be Migrated To Openstack Need Design Or Architectural Changes To Adapt To Openstack Architecture?

Answer :

This depends on software requirements. Simple apps which could run on Linux on a KVM virtual machine can generally port to OpenStack without changes. For higher-order programs that run on a couple of servers and provide their own high availability using commonplace gear like message queues and HAproxy/load balancing, it could be suitable to architect deployments to reflect OpenStack best-practices for availability (i.E., soak up thoughts fault domains and availability zones to dispose of probably single factors of failure), however deeper modifications in all likelihood received’t be needed. Only in cases in which software HA is platform-structured can also deeper reengineering be needed. A correct introductory text for enhancing applications may be determined at:  http://pivotal.Io/platform-as-a-carrier/migrating-to-cloud-local-application-architectures-e-book

Question 2. What Is Contrail?

Answer :

Contrail is a mission that implements network virtualization as an overlay community like minded with existing IETF requirements. It is an implementation of the Neutron API that gives allotted routing and interoperability with network home equipment.

Python Interview Questions
Question three. Does Contrail Work In Headless Mode? Basically, I Want To Know What Is Going To Happen To Vms Traffic If The Three Config/control Nodes Are Gone.

Answer :

Yes. The Contrail compute node additives can paintings in case all of the manipulate-nodes have become unavailable. Likewise the manipulate nodes can maintain to operate in case all of the config nodes come to be unavailable. Components are designed to perform in energetic-lively mode.

Question 4. Will I Need Juniper Kit To Run Contrail? If I Do What Kit? L2/l3 Switches Or A Router?

Answer :

 No. You can run Contrail with out Juniper community tools. The switching gear simply needs in an effort to bypass IP packets. For gateway among overlay and outside networks you may use the software program gateway protected in Contrail or any L3VPN-well suited appliance that supports MPLS over GRE.

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Question five. Does Contrail Require Juniper Switches Or Is It Compatible With Other Vendors’ Hardware?

Answer :

No, Contrail does not require Juniper hardware (or any unique hardware until anticipated traffic calls for the additional throughput of a hardware answer). Mirantis and Juniper clients are currently operating with several customers in manufacturing with non-Juniper hardware. The Mirantis/Juniper Reference Architecture contains commands for configuring both Juniper and Cisco instance hardware.

Cloud Computing Interview Questions
Question 6. What Is The Main Differentiation For Contrail Compared To Nsx?

Answer :

Dynamic routing. Contrail is constructed around the concept of being able to federate clusters controlled by means of doubtlessly one of a kind admin government through BGP. That is what it uses to federate its manage-nodes internally and to interoperate with current L3VPN community equipment.

Question 7. Is It Possible To Run Openstack In Ipv6-most effective Mode Using Opencontrail, I.E., No Ipv4 At All, Neither In The Underlay Nor The Overlay Network?

Answer :

No. Contrail implements an IPv6 overlay. No plans at the moment to work on an IPv6 underlay.

Cloud Computing Tutorial Linux Embedded structures Interview Questions
Question eight. Do Both The Horizon Ui And Contrail Webui Integrate With Each Other Or Do You Have To Go To Each Ui?

Answer :

Currently most deployments use Horizon as a tenant UI and the Contrail UI as a network admin/secops UI. There are Horizon extensions for API extensions, however admin-centric API extensions plus analytics are only seen via the Contrail UI. In practice each sort of person interacts with a single UI.

Question nine. For Legacy Dc To Cloud Iaas (based On Openstack), How Does Openstack Provide Ha For The Vms?

Answer :

Typically through a device including Heat this is doing utility management. There are different open source and business alternatives additionally.

Red Hat Linux Essentials Interview Questions
Question 10. How Does The Licensing Work? Who Owns The Support?

Answer :

OpenContrail is an Apache v2 licensed mission. Juniper Networks gives business assist for OpenContrail.

Linux Embedded structures Tutorial
Question 11. Is Contrail A Substitute/alternative To Neutron/nova Network?

Answer :

Contrail implements the Neutron API. It can be seen as an opportunity to the reference implementation of Neutron thru OVS.

Red Hat Linux System Administration Interview Questions
Question 12. Is There A Contrail “checkbox” In Fuel?

Answer :

Not but

Python Interview Questions
Question 13. Is There A Dependency Between Openstack Versions And Contrail Versions? Do We Have To Worry About Getting With The Right Version Mapping Between The Two?

Answer :

Contrail consists of a Neutron plugin. There are dependencies when the API to that Neutron plugin adjustments in a non-backwards-well suited manner.

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Question 14. What Is Possible With Openstack/contrail In Terms Of Orchestration For Nfv In A Telco Cloud Environment (provisioning, Chaining, … Of Nfs)?

Answer :

 OpenStack + Contrail is being used by numerous carriers to deploy NFV packages. It permits NFVs to be deployed and procedures IP visitors that transits among external networks.

Question 15. When Will You Release The Opencontrail Fuel Plugin?

Answer :

The OpenContrail Fuel plugin is scheduled for release with Mirantis OpenStack 6.1.

Microsoft Azure Interview Questions
Question sixteen. L3 Attach Of Vrouter To Ip Fabric Via Ospf Instead Of At L2 Via Lacp?

Answer :

Support for more than one L3 interfaces (instead of LACP bond pairs) is planned.

Question 17. What’s The Status Of The Intel Dpdk Implementation Of Vrouter, And What’s The Speed?

Answer :

Development branch has merged into mainline.

OpenStack Interview Questions
Question 18. Is It Possible To Deploy Openstack And Opencontrail Architecture Crossing Wan? Meaning, Can The Oc Controller Be At Datacenter A While Vrouter Is Deployed In Datacener B, In A Different City?

Answer :

Yes, it is feasible within reasonable latency durations.

Cloud Computing Interview Questions
Question 19. Can Contrail Be Used Without Openstack, I.E., As A Solution To Network Docker?

Answer :

Yes, it may. It doesn’t depend on OpenStack. It is a supported plugin in CloudStack, for example.

Question 20. For Virtual Applications That Require An “outside” Network Without The Floating Ip Concept, Meaning Without Nat, Would It Be Possible To Use Contrail To Allow Such A Custom Networking Configuration?

Answer :

Yes. Most of the Contrail manufacturing deployments try this.

Ansible (software) Interview Questions
Question 21. Do We Need To Have Hardware In The Datacenter That Understands Mpls/bgp/l3vpn? Dc Won’t Have Them As These Are Wan Technology/protocols?

Answer :

There is a software gateway implementation that is furnished as a part of Contrail. It becomes more efficient to use hardware appliances after you pass a positive threshold of external visitors (e.G. 10G).

Question 22. What Does Contrail Offers That Neutron Is Not Already Providing Today?

Answer :

Dynamic routing and carrier chaining. We additionally trust that it is a greater scalable implementation when as compared to the reference implementation.

Question 23. If You Already Have A Mirantis Distro, Do You Have A Cookbook To Get Contrail On The Current Installation?

Answer :

We evolved internal runbooks for integrating in advance versions of Contrail/OpenContrail components to Mirantis OpenStack 5 (Icehouse), but those are now deprecated and no longer supported.

Advanced Linux Interview Questions
Question 24. Are Overlays Such As Vxlan Supported?

Answer :

vxlan is supported with a EVPN control aircraft.

Linux Embedded systems Interview Questions
Question 25. Can Mirantis 6.0 Now Upgraded Icehouse Nodes To Juno Or Is It Still Just The Fuel Server That Is Upgraded?

Answer :

Mirantis 6.0 does now not support the upgrade of OpenStack itself, but it does upgrade the Fuel Master. An upgraded Fuel Master can installation new environments (6.Zero) while continuing to manage older environments including 5.1. We can be liberating functionality to deliver Mirantis OpenStack patches from a Mirantis-hosted repository in 6.1.

We will even offer an improve manual for in-area improve of environments in the 6.1 timeframe. The upgrade guide is constrained and could now not cowl all deployment configurations. We are taking a careful, pragmatic method to report a manner for improve, check it, and discover gaps. In our 7.Zero launch, we plan to amplify the coverage of upgrade and supply tooling to help the technique. Upgrade of Contrail-primarily based deployments will no longer be supported by means of the upgrade guide.

Question 26. Does The Mx80 Router (part Router) Hold All The States Of Tenant Vms From Entire Cloud?

Answer :

No. It most effective holds routes for floating-ip addresses.

Linux Virtualization Interview Questions
Question 27. Does This Use Vxlan For The Overlay Or Some Other Protocol?

Answer :

It defaults to using MPLS-over-UDP as encapsulation for IP traffic; it also helps MPLS-over-GRE and VXLAN>.

Red Hat Linux Essentials Interview Questions
Question 28. Does The If-map Integration Rely On A Specific Commercial Implementation Of An If-map Server Or Is There A Packaged Version Of An Open Source If-map Implementation With Opencontrail?

Answer :

 No. We currently use an open source assignment (irond).

Question 29. Do You Need The Contrail Controller Nodes To Be On Bare Metal To Scale? If So, Is There Any Guidance On The Recommended Hw (similar To What Mirantis Provided For Openstack Nodes)?

Answer :

No. Several manufacturing deployments use VMs to run the controller additives.

Automation Anywhere Interview Questions
Question 30. Does A Deployment Of Contrail On Exclusively Juniper Gear Provide Any Config Or Performance Advantage?

Answer :

Juniper can provide configuration courses for deployments with Juniper Network device; it is also how we validate the answer. So it is less complicated to guarantee that it works.

Question 31. How Does Contrail Handle Network Partition In The Datacenter?

Answer :

We can address partition of multi-facility deployments throughout a WAN with a design in each nearby compute node’s peer with local manipulate-nodes. This is based at the reality that manipulate nodes peer with BGP.

Question 32. When Will Opencontrail Cooperate With Os Version Juno?

Answer :

There are deployments based totally on Juno.

Vmware Vsphere Interview Questions
Question 33. Any Plans To Upstream Opencontrail Plugin/extensions Into Neutron Openstack?

Answer :

OpenContrail is an impartial assignment that works with different orchestrators.

Red Hat Linux System Administration Interview Questions