Why should you care about network virtualization? That question has more than a single answer. In fact, in this chapter, I describe several themes that point to a single overarching need: It’s time...
Virtualization and virtual situations are major basics for files input in cloud adding. It is assistances for together the visitor user and the worker while it provides the first with the features needed to execute his demand, it gives the second the
This paper examines and describes various virtualization architectures, its challenges for soft real-time, and effects on an Online Charging System (OCS) deployment architecture therein. …Full description
Cloud computing is used to utilize the shared resources to a maximum possible extent. These resources are shared by more than one user at a time as per their need. This improves computing power for...
Unofficial guide to VCP6-DCV exam
Short description of VNC SCFull description
Cloud edge
Bags, Socks, & Market Wallets
Forloop/Abuja
containers and virtualization tools (Docker)
Imo Inyang Full Stack Developer @ Reimnet @imo_inyang on twitter imo@reimnet.com
What is Virtualization? virtualization refers to the act of creating a virtual (rather than actual) version of something inclu!ing virtual computer har!ware platforms operating systems storage !evices an! computer network resources.
VM – Virtual Machines –-Hypervisor and Vagrant
Containers –-Docker introduction ---asic !etup and usage
Virtual Machines " #$ is essentially an emulation of a real computer that e%ecutes programs like a real computer. #$s run on top of a physical machine using a &hypervisor'. " hypervisor in turn runs on either a host machine or on &aremetal'.
Virtual Machines
hypervisor " hypervisor is a software firmware or har!ware that #$s run on top of. *he hypervisors themselves run on physical computers referre! to as the &host machine'. *he host machine provi!es the #$s with resources inclu!ing R"$ an! +,-. *hese resources are !ivi!e! etween #$s an! can e !istriute! as you see fit.
$ype % hypervisor *ype hypervisor (also calle! a are metal hypervisor) is installe! !irectly on physical host server har!ware /ust like an operating system. *ype hypervisors run on !e!icate! har!ware. *hey re0uire a management console an! are use! in !ata centers.
"#amples 1racle 1#$ for S,"R+ 2S3i 4yper# an! 5#$.
$ype & hypervisor hoste! hypervisor is a virtual machine manager that is installe! as a software application on an e%isting operating system (1S).
"#amples #$ware Fusion 1racle #irtual 6o% 1racle #$ for %78 Solaris 9ones ,arallels an! #$ware :orkstation
Containers -nlike a #$ which provi!es har!ware virtualization a container provi!es operatingsystemlevel virtualization y astracting the &user space'. ;ou
Containers
What is the Di''erence Containers and VMs?
+ontainers share the host system
Docker Docker is an opensource pro/ect ase! on >inu% containers. =t uses >inu% 5ernel features like namespaces an! control groups to create containers on top of an operating system.
e'ore Docker ?oogle has een using their own container technology for years. 1thers >inu% container technologies inclu!e Solaris 9ones 6SD /ails an! >3+ which have een aroun! for many years.
!o (hy Docker?
Why Docker? %) "ase o' use* Docker has made it much easier 'or anyone+developers, systems admins, architects and others+ to take advantage o' containers in order to uickly .uild and test porta.le applications) $he mantra is* /.uild once, run any(here)0
Why Docker? &) !peed* Docker containers are very light(eight and 'ast) !ince containers are 1ust sand.o#ed environments running on the kernel, they take up 'e(er resources) 2ou can create and run a Docker container in seconds, compared to VMs (hich might take longer .ecause they have to .oot up a 'ull virtual operating system every time)
Why Docker? 3) Docker 4epository* Docker users also .ene'it 'rom the increasingly rich ecosystem o' Docker Hu., (hich you can think o' as an /5ithu. 'or Docker images)0 Docker Hu. has tens o' thousands o' pu.lic images created .y the community that are readily availa.le 'or use) It6s incredi.ly easy to search 'or images that meet your needs, ready to pull do(n and use (ith little-to-no modi'ication)
Why Docker?
7) Modularity and !cala.ility* Docker makes it easy to .reak out your application6s 'unctionality into individual containers) $his is needed in todays (orld o' micro services
Concept o' Docker
Concept o' Docker Docker "ngine Docker engine is the layer on (hich Docker runs) It6s a light(eight runtime and tooling that manages containers, images, .uilds, and more) It runs natively on 8inu# systems and is made up o'* %) 9 Docker Daemon that runs in the host computer) &) 9 Docker Client that then communicates (ith the Docker Daemon to e#ecute commands) 3) 9 4"!$ 9:I 'or interacting (ith the Docker Daemon remotely)
Docker Images Simply the lueprint of a !ocker application Docker Container *his are real instances of an application +reate! from !ocker images Docker Daemon 6uil! run an! !istriutes !ocker containers Docker Client Docker on our local mechine *hink of it as the -= for Docker. Docker Hu. " repository for !ocker images ( githu for !ocker)
Docker'ile " Dockerfile is where you write the instructions to uil! a Docker image. *hese instructions can e R-A aptget y install somepackage to install a software package 23,1S2 7BBB to e%pose a port 2A# "A*_41$2 CusrClocalCapacheant to pass an environment variale an! so forth. 1nce you
Installing Docker
