Curs 4API de virtualizare

Servicii de ret,ea pentru ISP

18 martie 2010

SRISP Curs 4, API de virtualizare 1/29

Outline

Virtualizare

libvirt

VIX API

Concluzii

Intrebari

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Not, iuni de virtualizare (recapitulare)

I nod (host node, hardware node)

I hypervisor

I mas, ina virtuala (guest)

I paravirtualizare, virtualizare completa, emulare

I virtualizare cu suport hardware, virtualizare la nivelul SO

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Solut, ii de virtualizare

I VMware Workstation, Server, VirtualBox, VirtualPC

I Xen, VMware ESX, Hyper-V, Oracle VM

I OpenVZ, lxc, Linux V-Server, Container/Zone

I KVM, qemu, UML

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Interfet,e de gestiune a solut, iilor de virtualizare

I graficeI integrate ın cadrul aplicat, iei (VMware, VirtualBox)I Virtual Machine Manager (libvirt Python)I Proxmox Virtual Environment

I CLII qemuI vzctlI virsh (libvirt)I vmware-cmd

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API de virtualizare

I automation API

I VMware VIX API

I VirtualBox API

I Xen API

I libvirt

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Outline

Virtualizare

libvirt

VIX API

Concluzii

Intrebari

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libvirt

I interact, iune cu solut, ii de virtualizare (ın principal Linux)

I C API, binding-uri ın alte limbaje

I suport init, ial/principal pentru Xen, Qemu, KVM

I suport pentru LXC, OpenVZ, VMware ESX/GSX, VirtualBox(drivere)

I daemon de control (libvirtd) acolo unde este cazul – nuexista hypervisor (Qemu, KVM)

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Instalare

I # apt-get install libvirt0 libvirt-bin

libvirt-dev libvirt-doc virtinst

I libvirt-bin – daemon libvirt(/etc/default/libvirt-bin)

I virtinst – comenzi pentru creare/clonare de mas, ini virtuale

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Connection URI

I identificarea driverului s, i, eventual, a sistemului de la distant, a

I test:///default – test

I xen:/// – Xen

I qemu:///system, qemu:///session – Qemu, KVM

I openvz:///system – OpenVZ

I openvz://example.com/system – remote connection

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Drivers

I delegarea implementarii unui driver specifici unei solut, ii devirtualizare

I selectat pe baza URI-ului

I Xen, QEMU, LXC, test, OpenVZ, VirtualBox, VMware ESX,OpenNebula

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virsh

I interfat, a de comanda a mas, inilor virtuale

I construita peste libvirt

I virsh <command> <domain-id>

I $ sudo virsh -c openvz:///system list

I $ sudo virsh -c openvz:///system

Welcome to virsh, the virtualization interactive

terminal.

...

I comenzi utile: start, shutdown, reboot, create, setmem,setvcpus, console

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Basic API

I virConnectPtr – structura de date pentru conexiuni

I virDomainPtr – structura de date pentru domenii

I virErrorPtr – pentru lucrul cu errori

I import libvirt – Python

I #include <libvirt/libvirt.h>, #include<libvirt/virterror.h> – C

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Python example

1 import libvirt

2 import sys

3

4 # check /usr/share/pyshared/libvirt.py5

6 if name ==’ main ’:

7 conn=libvirt.open(’openvz:///system’)

8 print ’Listing running domains’

9 for id in conn.listDomainsID():

10 dom = conn.lookupByID(id)

11 print "id: ", id, "name: ", dom.name()

12

13 dom = conn.lookupByID(100)

14

15 print "stopping domain 100 ... ",

16 sys.stdout.flush()

17 dom.shutdown()

18 print "done"

19

20 print "starting domain 100 ... ",

21 sys.stdout.flush()

22 dom.create()

23 print "done"

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C example

I Demo

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C example Makefile

1 CFLAGS = -Wall -g

2 LDLIBS = -lvirt

3

4 all: openvz-list-start-stop

5

6 openvz-list-start-stop: openvz-list-start-stop.o

7

8 openvz-list-start-stop.o: openvz-list-start-stop.c

9

10 clean:11 -rm -f openvz-list-start-stop openvz-list-start-stop.o *∼

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Outline

Virtualizare

libvirt

VIX API

Concluzii

Intrebari

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VIX API

I http://www.vmware.com/support/developer/vix-api/

I VMware Virtualization API

I automatizare, gestiune s, i interact, iune cu mas, inile virtuale

I VMware ESX/GSX, Workstation, Player, vCenter

I C, Perl, COM (Visual Basic, C#)

I Linux & Windows

I versiunea 1.8, 1.10 beta

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Instalare

I descarcare de pe site-ul VIX API (trebuie sa va ınregistrat, i)

I sudo bash VMware-VIX-1.8.1-207905.x86_64.bundle

I pentru dezinstalare: vmware-installer -u vmware-vix

I pentru operat, ii de interact, iune este nevoie de VMware Toolspe sistemul guest

I instalat ın /usr/lib/vmware-vix/

I documentat, ie s, i exemple ın /usr/share/doc/vmware-vix/

I acces local la documentat, ie:file:///usr/share/doc/vmware-vix/index.html

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Interfat,a CLI

I similara virsh – permite gestiunea mas, inilor virtualeI vmware-cmd

I pentru versiuni serverI doar pentru gestiune (pornire, oprire, adaugare de discuri)I nu ofera comenzi de interact, iune cu sistemul guest

I vmrunI construita peste VIX APII gestiunea completa s, i interact, iunea cu mas, inile virtuale

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Funct, ionalitat, i VIX API

I identificarea mas, inii virtuale se realizeaza prin caleacompleta catre fis, ierul .vmx

I listare mas, ini virtuale porniteI vmrun -T ws list

I pornirea mas, inii virtualeI vmrun -T ws start /path/to/vmx

I oprirea mas, inii virtualeI vmrun -T ws stop /path/to/vmx

I snapshotI vmrun -T ws snapshot /path/to/vmx snapshotName

I listarea proceselor dintr-o mas, ina virtualaI vmrun -T ws -gu username -gp password

listProcessesInGuest /path/to/vmx

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VIX API – Not, iuni de baza

I object-based, se folosesc handle-uri (VixHandle)

I VixHost_abcd – operat, ii pe host

I VixVM_abcd – operat, ii pe guest

I operat, ii asincrone – folosire VixJob_Wait pentru

I VixError, VixJob_GetError, Vix_GetErrorText as, teptare

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Elemente VIX API

I succesiunea obis,nuita a operat, iilorI VixHost_RegisterVMI VixHost_ConnectI VixVM_PowerOnI VixVM_LoginInGuestI work, workI VixVM_LogoutFromGuestI VixVM_PoweroffI Vix_ReleaseHandleI VixHost_UnregisterVM

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Makefile pe Linux

1 CFLAGS = -Wall -g

2 CPPFLAGS = -I/usr/include/vmware-vix

3 LDLIBS = -lvixAllProducts -ldl

4

5 all: powerOn

6

7 powerOn: powerOn.c

8

9 clean:10 -rm -f powerOn powerOn.o *∼

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Exemplu C

I demo din samples

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Outline

Virtualizare

libvirt

VIX API

Concluzii

Intrebari

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Cuvinte cheie

I virtualizare

I interfet,e de gestiune a MV

I API de virtualizare

I libvirt

I connection URI

I virsh

I libvirtd

I virConnectPtr,virDomainPtr

I VIX API

I vmware-cmd

I vmrun

I fis, ier .vmx

I handle de VIX API

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Link-uri utile

I http://libvirt.org/

I http://www.ibm.com/developerworks/linux/library/

l-libvirt/

I http://www.vmware.com/support/esx21/doc/

vmware-cmd.html

I http:

//www.vmware.com/pdf/vix180_vmrun_command.pdf

I http://www.vmware.com/support/developer/vix-api/

I http://www.vmware.com/support/developer/vix-api/

vix18_reference/

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Outline

Virtualizare

libvirt

VIX API

Concluzii

Intrebari

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