Implement Virtual Machines Flashcards
Todo: -Need to review metrics and alert capabilities in addition
Max file size of Azure OS disk?
127GB
Max file size of Azure Data disk?
1023GB (~1TB)
Disk format supported?
Fixed VHD
Tool used to Generate Operating System “Generic” image on Windows?
sysprep.exe
Tool used to Generate Operating System “Generic” image on Linux?
Azure Agent (waagent.exe)
Difference between Generic System Images and Specialized Images?
Generic - Removes SID’s, hostname, local credentials, and the system must be shut down before the capture.
Specialized - (Point in time capture/snapshot) Keeps all customization’s like hostnames, and local credentials.
What is a Custom Script Extension?
It allows you to execute a (usually powershell) script against a VM from an Azure Storage account.
What is Powershell Desired State Configuration (DSC)?
Powershell script(s) that allow you to configure the roles, features, registry, files,etc on the machine. It then periodically checks the vm to make sure those settings have been maintained. If any of the settings have changed, then it changes them back to your “desired” state.
What is the Virtual Machine Access Extension?
Lets you reset the local admin account and enable RDP if accidently disabled. Must have the Azure VM Guest Agent installed to work.
Yes/No: Does Azure have a built-in DNS server that supports name resolution automatically for virtual machines within the same cloud service/virtual network?
Yes, Very Basic Functionality - everything else like reverse dns or connection to another virtual network needs your own DNS server.
Max number of Endpoints that can be load balanced and or scaled?
50
What is a fault domain and how is it Implemented in Azure?
Each availability set will also be comprised of two fault domains. Fault domains represent which virtual machines will be on separate physical hardware for redundancy. This limits the impact of physical hardware failures such as server, network, or power interruptions.
How many update domains are available to a Availability Set?
5, Update domains indicates the groups of virtual machines and the underlying physical hardware that can be rebooted at the same time for host updates
What are the 3 storage redundancy tiers?
Local Redundant, Geo-Redundant, Read-Access Geo Redundant
How is data replicated on the Local Redundant data tier?
Each disk is replicated a minimum of 3 times within the same region of the storage account
