You can deallocate a VM by using the stop button in the portal to turn it off.
Disk Resize
NOTE: Virtual machines MUST be deallocated in order to resize.
Using the portal
- In the Azure portal select the VM you wish to resize
- Select the stop button (this should deallocate it)
- Navigate to 'Disks' in the lefthand pane
- Select the disk you wish to resize by name
- Navigate to 'Size + performance' under 'Settings' in the lefthand pane
- Update disk accordingly
Once restarted:
- use growpart to grow the partition to fill up all available space on the disk
- use resize2fs to grow the volume to utilize the new partition space