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Lab 3.b - Generalize and capture a Linux Image

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This lab is part of a series of labs for Mastering the Virtual Machine Offers workshop. You should finish this lab before moving on to the next labs in this course.

Generalize and Capture#

In this module, we will SSH into the VM and generalize the Virtual machine

SSH into the Virtual Machine#

  1. On your Azure Portal, navigate to the VM you just created. Click on Connect from the tabs on the left under Settings.
  2. In the SSH blade, paste the local path where the downloaded private key resides into the Private key path textbox. This will generate the command to SSH into the VM below. Copy this command.
  3. Example: when you paste [C:\Users\CurrentUser\Downloads\VM_key.pem] into textbox 3, command SSH -i [C:\Users\CurrentUser\Downloads\VM_key.pem] [user]@[ip] will be generated at textbox 4.
  4. Open command prompt locally and paste this copied command and press enter. Type in yes when prompted to authenticate the host.

Generalize the VM#

  1. In the SSH window, enter this command sudo waagent -deprovision+user
  2. Type Y to continue (you can add the -force parameter to the previous command to avoid the confirmation step).
  3. After the command completes, enter Exit to close the SSH client.

Stop Virtual Machine#

In the Azure portal, navigate to your VM in your resource group (RG) and de-allocate the VM (Stop).

Your VM is now generalized and you can create a new VM using this VM disk.

Capture the Image#

In this module, we will capture an image from the Generalized VM and store it in a Compute Gallery. We will also define Image definitions within the Compute Gallery for organization.

  1. Navigate to the VM on Azure Portal. You will see that the VM has been stopped under VM Status
  2. Click on Capture from the options available on top

Create an Image#

  1. Select a subscription from the dropdown menu
  2. For Resource Group, select the same resource group we created earlier VMworkshop-rg-YOUR_UNIQUE_STRING.
  3. Under Instance details, select the Yes, share it to a gallery as a VM image version radio button
  4. Under Gallery Details, select Create new and give it a name
  5. For Operating system state, select the Generalized radio button
  6. Click the Create new for Target VM image definition and give your definition a name and click OK
  7. Give your image a version name of 0.0.1
  8. Lastly click Review + Create at the bottom. Once validation has passed, click Create.

Post Image Creation Exercise#

In this exercise we will verify that the image is created and ready to be used. 1. In your Azure Portal, search for Compute Gallery using the search bar and select your new Compute Gallery 1. Click on the definition you created 1. You should now see the version number of the image created as well as verify the Provisioning State is Succeeded and Replication Status is Completed.

Congratulations! You have now finished this lab.

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