Ohne Titel

Seite 1

HA configuration and Processes:

HA States--Enabling HA cluster, will then elect a host to be master. All other hosts are slaves.

master:

Manges the protected list of VMs. Updates on power on and off.

Caches the cluster configuration. Notify and informs the slaves of configuration changes.

Send heartbeat to the slaves.

Reports state info to vCenter

slave:

Monitor local runtime of VMs. Changes report to Master.

Monitor health of the master/new election

Enables features from HA that dont require master.(VM health monitoring)

FT VS HA

Difference between the interruption to VMS in a failure

FT keeps a copy of the VM on another host

HA boots a dead hosts VM onto another host, HA will restart the VM on the same host if an OS failure occurs.

Seite 2

HA configuration

Admission control-

Advises the user of resource management with number of VMs to power and protect

VM options-

Adding VMs to Restart Priority is a failure some VMs are more critical

Isolation Response Hosts lose connection from the network, but have no failed. Power on/off vms?

VM monitoring-

Restarting a VM on application or OS failures

Datastore heartbeating-

PIng through esxi amgaement datastores

Seite 3

FT VS HA-

Differences + FT configuration

FT:

Using FastCheckpointing scale beyond 1 vCPU

enabling FT enables vMotion

Sync copies of hosts( mirror paity)

Vsphere Replication:

-Can copy VMs within/outside a cluster.

-Target or source can be within/outside the same Center.

Seite 4

VM Hardware:

motherboard-intel 440BX

Nics-E1000, E1000e, AMD PCnet

Buslogic parrallel SCSI, LSI SCSI, LSI SAS

MAX Specs

128 CPUS

4TB RAM

62TB Disks

10 Nics

Common Files

VMX-defines the hardware in the vm, processors/ram/nic/mac/etc

VMDK

Seite 5

VMWARE TOOLS PROS

optimized Nic,SCSI drivers

VM heartbeat

VSS support/Backups quiescing

Memory management

API access->PowerCLI to reach guest OS

Cloing a VM

faster way to provision

copies config files

no need to install guest OS

Guest customization

Ensure unquie ip, mac address, name, etc when cloning

Uses sysprep to create new name ip and sid

Temple

Clone to template

clone template to library

convert to template

OVF Template

Manifest File-- ends in .mf contain SHA-1 digests of the other files

OVF descriptor-- XML document that contains info about the OVF template such as product detail, hardware, requirements, licensing

VHD-- .vmdk: virtual hard disk ormates OVF support these files

OVA

distributed as a singple files either .ova or TAR. OVF is strict about the placement and order in the OVA.Easier to read, but easier to move around

Seite 6

VAPPs

multiple VMs into single unit

easier to manage in v Sphere

Cant Vapp in a cluster without DRS(balances loads)

create container+ configure, add to container by cloining/deploying template, or from scratch

VAPP ALLocation

On a prioity scale for resources to reserve which are shared across the VMs

VAPP IP allocations

Static-typed manual

Transient-uses ip pools that automatically assign

DHCP-dhcp server used to assign

CPU affinity-Statically associate a VM to a specific CPU Core

Draw backs

Prevent vmotion

No loadbalancing

cant use in a DRS cluster

memory CPU reservations once allocated can use used if the vm is idle or off

memory reservations are permanent

HA Types

Database-

Seite 7