Azure Virtual Machine

1. Overview:

• IaaS
  • pwsh: Az.Compute, AzVM
  • cli: az vm
• You can specify a name with up to 15 characters on a Windows virtual machine and 64 characters on a Linux virtual machine.
• Shutdown in VM doesnt actually shutdown, must shutdown externally
• Belongs to a resource group
• Can buy a RI (Reserved Instance) as commited usage
  • up to 72% price savings compared to pay-as-you-go pricing
  • flexible and can easily be exchanged or returned for an early termination fee.
  • atleast 1 year
• Storage costs are charged separately for the Azure Storage used by the virtual machine.
  • The status of the virtual machine has no relation to the Azure Storage charges that are incurred.
  • You’re always charged for any Azure Storage used by the disks.
• Your disk image can be uploaded to Azure Storage what what?

2. Activity log:

3. Access Control:

4. Tags:

5. Diagnostics and:

B. Connect:

1. Connect:

• 

2. Bastion:

C. Networking:

D. Settings:

1. Disks:

• https://learn.microsoft.com/en-us/azure/virtual-machines/managed-disks-overview
• Have at least two disks:
  • an operating system disk
    • registered as a SATA
    • has label C:
  • a temporary disk.
    • labeled as the D: drive by default.
    • On Windows virtual machines, the temporary disk is labeled as the D: drive by default. This drive is used for storing the pagefile.sys file.
    • On Linux virtual machines, the temporary disk is typically /dev/sdb. This disk is formatted and mounted to /mnt by the Azure Linux Agent.
    • Don’t store data on the temporary disk. This disk provides temporary storage for applications and processes and is intended to only store data like page or swap files.
  • one or more optional data disks.
    • A data disk is a managed disk that’s attached to a virtual machine to store application data, or other data you need to keep.
    • Data disks are registered as SCSI drives and are labeled with a letter you choose.
    • The size of a virtual machine determines how many data disks you can attach and the type of storage you can use to host the data disks.
    • Azure Storage vs Managed Disk:
      • Managed disks are stored as virtual hard disks (VHDs).
        • stored as page blob
        • The available types of disks are Ultra Solid State Drives (SSD), Premium SSD, Standard SSD, and Standard Hard Disk Drives (HDD).
      • Azure Storage support standard and premium
• you can migrate existing virtual machine disks to Premium Storage.

E. Availability + scale:

1. VM Size:

• https://learn.microsoft.com/en-us/azure/virtual-machines/sizes

2. Availability and scale:

• Availability zone:
• Scaling: Azure Virtual Machine Scale Set
• Azure Availability Set