Taking a snapshot of a Managed Disk


We talked about Managed Disks, now let’s use them.

Let’s snapshot a Managed Disk and restore the snapshot on another VM.

Deploy ARM Template

{
  "$schema": "https://schema.management.azure.com/schemas/2015-01-01/deploymentTemplate.json#",
  "contentVersion": "1.0.0.0",
  "parameters": {
    "VM Admin User Name": {
      "defaultValue": "myadmin",
      "type": "string"
    },
    "VM Admin Password": {
      "defaultValue": null,
      "type": "securestring"
    },
    "VM Size": {
      "defaultValue": "Standard_DS4",
      "type": "string",
      "allowedValues": [
        "Standard_DS1",
        "Standard_DS2",
        "Standard_DS3",
        "Standard_DS4",
        "Standard_DS5"
      ],
      "metadata": {
        "description": "SKU of the VM."
      }
    },
    "Public Domain Label": {
      "type": "string"
    }
  },
  "variables": {
    "Vhds Container Name": "vhds",
    "frontIpRange": "10.0.1.0/24",
    "Public IP Name": "MyPublicIP",
    "Public LB Name": "PublicLB",
    "Front Address Pool Name": "frontPool",
    "Front NIC": "frontNic",
    "Front VM": "Demo-VM",
    "Front Availability Set Name": "frontAvailSet",
    "Private LB Name": "PrivateLB",
    "VNET Name": "Demo-VNet"
  },
  "resources": [
    {
      "type": "Microsoft.Network/publicIPAddresses",
      "name": "[variables('Public IP Name')]",
      "apiVersion": "2015-06-15",
      "location": "[resourceGroup().location]",
      "tags": {
        "displayName": "Public IP"
      },
      "properties": {
        "publicIPAllocationMethod": "Dynamic",
        "idleTimeoutInMinutes": 4,
        "dnsSettings": {
          "domainNameLabel": "[parameters('Public Domain Label')]"
        }
      }
    },
    {
      "type": "Microsoft.Network/virtualNetworks",
      "name": "[variables('VNet Name')]",
      "apiVersion": "2016-03-30",
      "location": "[resourceGroup().location]",
      "properties": {
        "addressSpace": {
          "addressPrefixes": [
            "10.0.0.0/16"
          ]
        },
        "subnets": [
          {
            "name": "front",
            "properties": {
              "addressPrefix": "[variables('frontIpRange')]",
              "networkSecurityGroup": {
                "id": "[resourceId('Microsoft.Network/networkSecurityGroups', 'frontNsg')]"
              }
            }
          }
        ]
      },
      "resources": [],
      "dependsOn": [
        "[resourceId('Microsoft.Network/networkSecurityGroups', 'frontNsg')]"
      ]
    },
    {
      "type": "Microsoft.Network/loadBalancers",
      "name": "[variables('Public LB Name')]",
      "apiVersion": "2015-06-15",
      "location": "[resourceGroup().location]",
      "tags": {
        "displayName": "Public Load Balancer"
      },
      "properties": {
        "frontendIPConfigurations": [
          {
            "name": "LoadBalancerFrontEnd",
            "comments": "Front end of LB:  the IP address",
            "properties": {
              "publicIPAddress": {
                "id": "[resourceId('Microsoft.Network/publicIPAddresses/', variables('Public IP Name'))]"
              }
            }
          }
        ],
        "backendAddressPools": [
          {
            "name": "[variables('Front Address Pool Name')]"
          }
        ],
        "loadBalancingRules": [
          {
            "name": "Http",
            "properties": {
              "frontendIPConfiguration": {
                "id": "[concat(resourceId('Microsoft.Network/loadBalancers', variables('Public LB Name')), '/frontendIPConfigurations/LoadBalancerFrontEnd')]"
              },
              "frontendPort": 80,
              "backendPort": 80,
              "enableFloatingIP": false,
              "idleTimeoutInMinutes": 4,
              "protocol": "Tcp",
              "loadDistribution": "Default",
              "backendAddressPool": {
                "id": "[concat(resourceId('Microsoft.Network/loadBalancers', variables('Public LB Name')), '/backendAddressPools/', variables('Front Address Pool Name'))]"
              },
              "probe": {
                "id": "[concat(resourceId('Microsoft.Network/loadBalancers', variables('Public LB Name')), '/probes/TCP-Probe')]"
              }
            }
          }
        ],
        "probes": [
          {
            "name": "TCP-Probe",
            "properties": {
              "protocol": "Tcp",
              "port": 80,
              "intervalInSeconds": 5,
              "numberOfProbes": 2
            }
          }
        ],
        "inboundNatRules": [
          {
            "name": "SSH-2-Primary",
            "properties": {
              "frontendIPConfiguration": {
                "id": "[concat(resourceId('Microsoft.Network/loadBalancers', variables('Public LB Name')), '/frontendIPConfigurations/LoadBalancerFrontEnd')]",
              },
              "frontendPort": 22,
              "backendPort": 22,
              "protocol": "Tcp"
            }
          }
        ],
        "outboundNatRules": [],
        "inboundNatPools": []
      },
      "dependsOn": [
        "[resourceId('Microsoft.Network/publicIPAddresses', variables('Public IP Name'))]"
      ]
    },
    {
      "apiVersion": "2015-06-15",
      "name": "frontNsg",
      "type": "Microsoft.Network/networkSecurityGroups",
      "location": "[resourceGroup().location]",
      "tags": {},
      "properties": {
        "securityRules": [
          {
            "name": "Allow-SSH-From-Everywhere",
            "properties": {
              "protocol": "Tcp",
              "sourcePortRange": "*",
              "destinationPortRange": "22",
              "sourceAddressPrefix": "*",
              "destinationAddressPrefix": "*",
              "access": "Allow",
              "priority": 100,
              "direction": "Inbound"
            }
          },
          {
            "name": "Allow-Health-Monitoring",
            "properties": {
              "protocol": "*",
              "sourcePortRange": "*",
              "destinationPortRange": "*",
              "sourceAddressPrefix": "AzureLoadBalancer",
              "destinationAddressPrefix": "*",
              "access": "Allow",
              "priority": 200,
              "direction": "Inbound"
            }
          },
          {
            "name": "Disallow-everything-else-Inbound",
            "properties": {
              "protocol": "*",
              "sourcePortRange": "*",
              "destinationPortRange": "*",
              "sourceAddressPrefix": "*",
              "destinationAddressPrefix": "*",
              "access": "Deny",
              "priority": 300,
              "direction": "Inbound"
            }
          },
          {
            "name": "Allow-to-VNet",
            "properties": {
              "protocol": "*",
              "sourcePortRange": "*",
              "destinationPortRange": "*",
              "sourceAddressPrefix": "*",
              "destinationAddressPrefix": "VirtualNetwork",
              "access": "Allow",
              "priority": 100,
              "direction": "Outbound"
            }
          },
          {
            "name": "Allow-to-8443",
            "properties": {
              "protocol": "*",
              "sourcePortRange": "*",
              "destinationPortRange": "8443",
              "sourceAddressPrefix": "*",
              "destinationAddressPrefix": "Internet",
              "access": "Allow",
              "priority": 200,
              "direction": "Outbound"
            }
          },
          {
            "name": "Disallow-everything-else-Outbound",
            "properties": {
              "protocol": "*",
              "sourcePortRange": "*",
              "destinationPortRange": "*",
              "sourceAddressPrefix": "*",
              "destinationAddressPrefix": "*",
              "access": "Deny",
              "priority": 300,
              "direction": "Outbound"
            }
          }
        ],
        "subnets": []
      }
    },
    {
      "type": "Microsoft.Network/networkInterfaces",
      "name": "[variables('Front NIC')]",
      "tags": {
        "displayName": "Front NICs"
      },
      "apiVersion": "2016-03-30",
      "location": "[resourceGroup().location]",
      "properties": {
        "ipConfigurations": [
          {
            "name": "ipconfig",
            "properties": {
              "privateIPAllocationMethod": "Dynamic",
              "subnet": {
                "id": "[concat(resourceId('Microsoft.Network/virtualNetworks', variables('VNet Name')), '/subnets/front')]"
              },
              "loadBalancerBackendAddressPools": [
                {
                  "id": "[concat(resourceId('Microsoft.Network/loadBalancers', variables('Public LB Name')), '/backendAddressPools/', variables('Front Address Pool Name'))]"
                }
              ],
              "loadBalancerInboundNatRules": [
                {
                  "id": "[concat(resourceId('Microsoft.Network/loadBalancers', variables('Public LB Name')), '/inboundNatRules/SSH-2-Primary')]"
                }
              ]
            }
          }
        ],
        "dnsSettings": {
          "dnsServers": []
        },
        "enableIPForwarding": false
      },
      "resources": [],
      "dependsOn": [
        "[resourceId('Microsoft.Network/virtualNetworks', variables('VNet Name'))]",
        "[resourceId('Microsoft.Network/loadBalancers', variables('Public LB Name'))]"
      ]
    },
    {
      "type": "Microsoft.Compute/virtualMachines",
      "name": "[variables('Front VM')]",
      "tags": {
        "displayName": "Front VMs"
      },
      "apiVersion": "2016-04-30-preview",
      "location": "[resourceGroup().location]",
      "properties": {
        "availabilitySet": {
          "id": "[resourceId('Microsoft.Compute/availabilitySets', variables('Front Availability Set Name'))]"
        },
        "hardwareProfile": {
          "vmSize": "[parameters('VM Size')]"
        },
        "storageProfile": {
          "imageReference": {
            "publisher": "OpenLogic",
            "offer": "CentOS",
            "sku": "7.3",
            "version": "latest"
          },
          "osDisk": {
            "name": "[variables('Front VM')]",
            "createOption": "FromImage",
            "caching": "ReadWrite"
          },
          "dataDisks": []
        },
        "osProfile": {
          "computerName": "[variables('Front VM')]",
          "adminUsername": "[parameters('VM Admin User Name')]",
          "adminPassword": "[parameters('VM Admin Password')]"
        },
        "networkProfile": {
          "networkInterfaces": [
            {
              "id": "[resourceId('Microsoft.Network/networkInterfaces', variables('Front NIC'))]"
            }
          ]
        }
      },
      "resources": [],
      "dependsOn": [
        "[resourceId('Microsoft.Network/networkInterfaces', variables('Front NIC'))]",
        "[resourceId('Microsoft.Compute/availabilitySets', variables('Front Availability Set Name'))]"
      ]
    },
    {
      "name": "[variables('Front Availability Set Name')]",
      "type": "Microsoft.Compute/availabilitySets",
      "location": "[resourceGroup().location]",
      "apiVersion": "2016-04-30-preview",
      "tags": {
        "displayName": "FrontAvailabilitySet"
      },
      "properties": {
        "platformUpdateDomainCount": 5,
        "platformFaultDomainCount": 3,
        "managed": true
      },
      "dependsOn": []
    }
  ]
}

We used the resource group named md-demo-snapshot.

This deploys a single Linux VM into a managed availability set using a premium managed disk

The deployment takes a few minutes

Customize VM

  1. Login to the VM
  2. We suggest using Putty tool with SSH (SSH port is opened on NSG)
  3. Look at MyPublicIP to find the DNS of the public IP in order to SSH to it
  4. In the bash shell type
    touch myfile
  5. This simply creates a file in the home directory of the admin user

 

Login into ISE

  1. Open up PowerShell ISE
  2. Type Add-AzureRmAccount
  3. Enter your credentials ; those credentials should be the same you are using to log into the Azure Portal
  4. If you have more than one subscriptions
  1. Type Get-AzureRmSubscription
  2. This should list all subscriptions you have access (even partial) to
  3. Select the SubscriptionId (a GUID) of the subscription you want to use
  4. Type Select-AzureRmSubscription -SubscriptionId <SubscriptionId>
    <SubscriptionId> is the value you just selected
  5. This will select the specified subscription as the “current one”, i.e. future queries will be done against that subscription

Create Snapshot

  1. In PowerShell ISE, type
    $rgName = ‘md-demo-snapshot’ # or the Resource Group name you used
    $disk = Get-AzureRmDisk -ResourceGroupName $rgName
    $config = New-AzureRmSnapshotConfig -SourceUri $disk.Id -CreateOption Copy -Location $disk.Location
    $snapshot = New-AzureRmSnapshot -Snapshot $config -SnapshotName ($disk.Name+’-snapshot’) -ResourceGroupName $rgName
  2. This creates a snapshot of the managed disk
  3. Snapshots are stored in standard storage and are full copies of the disk (incremental isn’t supported yet)

Look at snapshot

  1. In the portal, go to the resource group
  2. Select the snapshot resource
    clip_image002
  3. Notice the storage type is standard LRS

Change the existing VM

  1. Back in the SSH session, type
    touch myotherfile
  2. We do this simply to differentiate from the snapshot

Deploy VM from snapshot

{
  "$schema": "https://schema.management.azure.com/schemas/2015-01-01/deploymentTemplate.json#",
  "contentVersion": "1.0.0.0",
  "parameters": {
    "VM Admin User Name": {
      "defaultValue": "myadmin",
      "type": "string"
    },
    "VM Admin Password": {
      "defaultValue": null,
      "type": "securestring"
    },
    "VM Size": {
      "defaultValue": "Standard_DS4",
      "type": "string",
      "allowedValues": [
        "Standard_DS1",
        "Standard_DS2",
        "Standard_DS3",
        "Standard_DS4",
        "Standard_DS5"
      ],
      "metadata": {
        "description": "SKU of the VM."
      }
    },
    "Public Domain Label": {
      "type": "string"
    }
  },
  "variables": {
    "Vhds Container Name": "vhds",
    "frontIpRange": "10.0.1.0/24",
    "Public IP Name": "MyPublicIP",
    "Public LB Name": "PublicLB",
    "Front Address Pool Name": "frontPool",
    "Front NIC": "frontNic",
    "Front NIC Clone": "frontNic-Clone",
    "Front VM": "Demo-VM",
    "Front VM Clone": "Demo-VM-Clone",
    "Front Availability Set Name": "frontAvailSet",
    "VNET Name": "Demo-VNet"
  },
  "resources": [
    {
      "type": "Microsoft.Network/publicIPAddresses",
      "name": "[variables('Public IP Name')]",
      "apiVersion": "2015-06-15",
      "location": "[resourceGroup().location]",
      "tags": {
        "displayName": "Public IP"
      },
      "properties": {
        "publicIPAllocationMethod": "Dynamic",
        "idleTimeoutInMinutes": 4,
        "dnsSettings": {
          "domainNameLabel": "[parameters('Public Domain Label')]"
        }
      }
    },
    {
      "type": "Microsoft.Network/virtualNetworks",
      "name": "[variables('VNet Name')]",
      "apiVersion": "2016-03-30",
      "location": "[resourceGroup().location]",
      "properties": {
        "addressSpace": {
          "addressPrefixes": [
            "10.0.0.0/16"
          ]
        },
        "subnets": [
          {
            "name": "front",
            "properties": {
              "addressPrefix": "[variables('frontIpRange')]",
              "networkSecurityGroup": {
                "id": "[resourceId('Microsoft.Network/networkSecurityGroups', 'frontNsg')]"
              }
            }
          }
        ]
      },
      "resources": [],
      "dependsOn": [
        "[resourceId('Microsoft.Network/networkSecurityGroups', 'frontNsg')]"
      ]
    },
    {
      "type": "Microsoft.Network/loadBalancers",
      "name": "[variables('Public LB Name')]",
      "apiVersion": "2015-06-15",
      "location": "[resourceGroup().location]",
      "tags": {
        "displayName": "Public Load Balancer"
      },
      "properties": {
        "frontendIPConfigurations": [
          {
            "name": "LoadBalancerFrontEnd",
            "comments": "Front end of LB:  the IP address",
            "properties": {
              "publicIPAddress": {
                "id": "[resourceId('Microsoft.Network/publicIPAddresses/', variables('Public IP Name'))]"
              }
            }
          }
        ],
        "backendAddressPools": [
          {
            "name": "[variables('Front Address Pool Name')]"
          }
        ],
        "loadBalancingRules": [
          {
            "name": "Http",
            "properties": {
              "frontendIPConfiguration": {
                "id": "[concat(resourceId('Microsoft.Network/loadBalancers', variables('Public LB Name')), '/frontendIPConfigurations/LoadBalancerFrontEnd')]"
              },
              "frontendPort": 80,
              "backendPort": 80,
              "enableFloatingIP": false,
              "idleTimeoutInMinutes": 4,
              "protocol": "Tcp",
              "loadDistribution": "Default",
              "backendAddressPool": {
                "id": "[concat(resourceId('Microsoft.Network/loadBalancers', variables('Public LB Name')), '/backendAddressPools/', variables('Front Address Pool Name'))]"
              },
              "probe": {
                "id": "[concat(resourceId('Microsoft.Network/loadBalancers', variables('Public LB Name')), '/probes/TCP-Probe')]"
              }
            }
          }
        ],
        "probes": [
          {
            "name": "TCP-Probe",
            "properties": {
              "protocol": "Tcp",
              "port": 80,
              "intervalInSeconds": 5,
              "numberOfProbes": 2
            }
          }
        ],
        "inboundNatRules": [
          {
            "name": "SSH-2-Primary",
            "properties": {
              "frontendIPConfiguration": {
                "id": "[concat(resourceId('Microsoft.Network/loadBalancers', variables('Public LB Name')), '/frontendIPConfigurations/LoadBalancerFrontEnd')]"
              },
              "frontendPort": 22,
              "backendPort": 22,
              "protocol": "Tcp"
            }
          },
          {
            "name": "SSH-2-Secondary",
            "properties": {
              "frontendIPConfiguration": {
                "id": "[concat(resourceId('Microsoft.Network/loadBalancers', variables('Public LB Name')), '/frontendIPConfigurations/LoadBalancerFrontEnd')]"
              },
              "frontendPort": 5000,
              "backendPort": 22,
              "protocol": "Tcp"
            }
          }
        ],
        "outboundNatRules": [],
        "inboundNatPools": []
      },
      "dependsOn": [
        "[resourceId('Microsoft.Network/publicIPAddresses', variables('Public IP Name'))]"
      ]
    },
    {
      "apiVersion": "2015-06-15",
      "name": "frontNsg",
      "type": "Microsoft.Network/networkSecurityGroups",
      "location": "[resourceGroup().location]",
      "tags": {},
      "properties": {
        "securityRules": [
          {
            "name": "Allow-SSH-From-Everywhere",
            "properties": {
              "protocol": "Tcp",
              "sourcePortRange": "*",
              "destinationPortRange": "22",
              "sourceAddressPrefix": "*",
              "destinationAddressPrefix": "*",
              "access": "Allow",
              "priority": 100,
              "direction": "Inbound"
            }
          },
          {
            "name": "Allow-Health-Monitoring",
            "properties": {
              "protocol": "*",
              "sourcePortRange": "*",
              "destinationPortRange": "*",
              "sourceAddressPrefix": "AzureLoadBalancer",
              "destinationAddressPrefix": "*",
              "access": "Allow",
              "priority": 200,
              "direction": "Inbound"
            }
          },
          {
            "name": "Disallow-everything-else-Inbound",
            "properties": {
              "protocol": "*",
              "sourcePortRange": "*",
              "destinationPortRange": "*",
              "sourceAddressPrefix": "*",
              "destinationAddressPrefix": "*",
              "access": "Deny",
              "priority": 300,
              "direction": "Inbound"
            }
          },
          {
            "name": "Allow-to-VNet",
            "properties": {
              "protocol": "*",
              "sourcePortRange": "*",
              "destinationPortRange": "*",
              "sourceAddressPrefix": "*",
              "destinationAddressPrefix": "VirtualNetwork",
              "access": "Allow",
              "priority": 100,
              "direction": "Outbound"
            }
          },
          {
            "name": "Allow-to-8443",
            "properties": {
              "protocol": "*",
              "sourcePortRange": "*",
              "destinationPortRange": "8443",
              "sourceAddressPrefix": "*",
              "destinationAddressPrefix": "Internet",
              "access": "Allow",
              "priority": 200,
              "direction": "Outbound"
            }
          },
          {
            "name": "Disallow-everything-else-Outbound",
            "properties": {
              "protocol": "*",
              "sourcePortRange": "*",
              "destinationPortRange": "*",
              "sourceAddressPrefix": "*",
              "destinationAddressPrefix": "*",
              "access": "Deny",
              "priority": 300,
              "direction": "Outbound"
            }
          }
        ],
        "subnets": []
      }
    },
    {
      "type": "Microsoft.Network/networkInterfaces",
      "name": "[variables('Front NIC')]",
      "tags": {
        "displayName": "Front NIC"
      },
      "apiVersion": "2016-03-30",
      "location": "[resourceGroup().location]",
      "properties": {
        "ipConfigurations": [
          {
            "name": "ipconfig",
            "properties": {
              "privateIPAllocationMethod": "Dynamic",
              "subnet": {
                "id": "[concat(resourceId('Microsoft.Network/virtualNetworks', variables('VNet Name')), '/subnets/front')]"
              },
              "loadBalancerBackendAddressPools": [
                {
                  "id": "[concat(resourceId('Microsoft.Network/loadBalancers', variables('Public LB Name')), '/backendAddressPools/', variables('Front Address Pool Name'))]"
                }
              ],
              "loadBalancerInboundNatRules": [
                {
                  "id": "[concat(resourceId('Microsoft.Network/loadBalancers', variables('Public LB Name')), '/inboundNatRules/SSH-2-Primary')]"
                }
              ]
            }
          }
        ],
        "dnsSettings": {
          "dnsServers": []
        },
        "enableIPForwarding": false
      },
      "resources": [],
      "dependsOn": [
        "[resourceId('Microsoft.Network/virtualNetworks', variables('VNet Name'))]",
        "[resourceId('Microsoft.Network/loadBalancers', variables('Public LB Name'))]"
      ]
    },
    {
      "type": "Microsoft.Compute/virtualMachines",
      "name": "[variables('Front VM')]",
      "tags": {
        "displayName": "Front VM"
      },
      "apiVersion": "2016-04-30-preview",
      "location": "[resourceGroup().location]",
      "properties": {
        "availabilitySet": {
          "id": "[resourceId('Microsoft.Compute/availabilitySets', variables('Front Availability Set Name'))]"
        },
        "hardwareProfile": {
          "vmSize": "[parameters('VM Size')]"
        },
        "storageProfile": {
          "imageReference": {
            "publisher": "OpenLogic",
            "offer": "CentOS",
            "sku": "7.3",
            "version": "latest"
          },
          "osDisk": {
            "name": "[variables('Front VM')]",
            "createOption": "FromImage",
            "caching": "ReadWrite"
          },
          "dataDisks": []
        },
        "osProfile": {
          "computerName": "[variables('Front VM')]",
          "adminUsername": "[parameters('VM Admin User Name')]",
          "adminPassword": "[parameters('VM Admin Password')]"
        },
        "networkProfile": {
          "networkInterfaces": [
            {
              "id": "[resourceId('Microsoft.Network/networkInterfaces', variables('Front NIC'))]"
            }
          ]
        }
      },
      "resources": [],
      "dependsOn": [
        "[variables('Front NIC')]",
        "[resourceId('Microsoft.Compute/availabilitySets', variables('Front Availability Set Name'))]"
      ]
    },
    {
      "name": "[variables('Front Availability Set Name')]",
      "type": "Microsoft.Compute/availabilitySets",
      "location": "[resourceGroup().location]",
      "apiVersion": "2016-04-30-preview",
      "tags": {
        "displayName": "FrontAvailabilitySet"
      },
      "properties": {
        "platformUpdateDomainCount": 5,
        "platformFaultDomainCount": 3,
        "managed": true
      },
      "dependsOn": []
    },
    {
      "name": "[variables('Front VM Clone')]",
      "type": "Microsoft.Compute/disks",
      "location": "[resourceGroup().location]",
      "apiVersion": "2016-04-30-preview",
      "tags": {
        "displayName": "Clone Disk"
      },
      "properties": {
        "creationData": {
          "createOption": "copy",
          "sourceUri": "[resourceId('Microsoft.Compute/snapshots', concat(variables('Front VM'), '-snapshot'))]"
        },
        "accountType": "Premium_LRS",
        "diskSizeGB": 127,
        "osType": ""
      }
    },
    {
      "type": "Microsoft.Network/networkInterfaces",
      "name": "[variables('Front NIC Clone')]",
      "tags": {
        "displayName": "Front NIC Clone"
      },
      "apiVersion": "2016-03-30",
      "location": "[resourceGroup().location]",
      "properties": {
        "ipConfigurations": [
          {
            "name": "ipconfig",
            "properties": {
              "privateIPAllocationMethod": "Dynamic",
              "subnet": {
                "id": "[concat(resourceId('Microsoft.Network/virtualNetworks', variables('VNet Name')), '/subnets/front')]"
              },
              "loadBalancerBackendAddressPools": [
                {
                  "id": "[concat(resourceId('Microsoft.Network/loadBalancers', variables('Public LB Name')), '/backendAddressPools/', variables('Front Address Pool Name'))]"
                }
              ],
              "loadBalancerInboundNatRules": [
                {
                  "id": "[concat(resourceId('Microsoft.Network/loadBalancers', variables('Public LB Name')), '/inboundNatRules/SSH-2-Secondary')]"
                }
              ]
            }
          }
        ],
        "dnsSettings": {
          "dnsServers": []
        },
        "enableIPForwarding": false
      },
      "resources": [],
      "dependsOn": [
        "[resourceId('Microsoft.Network/virtualNetworks', variables('VNet Name'))]",
        "[resourceId('Microsoft.Network/loadBalancers', variables('Public LB Name'))]"
      ]
    },
    {
      "type": "Microsoft.Compute/virtualMachines",
      "name": "[variables('Front VM Clone')]",
      "tags": {
        "displayName": "Front VM Clone"
      },
      "apiVersion": "2016-04-30-preview",
      "location": "[resourceGroup().location]",
      "properties": {
        "availabilitySet": {
          "id": "[resourceId('Microsoft.Compute/availabilitySets', variables('Front Availability Set Name'))]"
        },
        "hardwareProfile": {
          "vmSize": "[parameters('VM Size')]"
        },
        "storageProfile": {
          "osDisk": {
            "name": "[variables('Front VM Clone')]",
            "createOption": "attach",
            "managedDisk": {
              "id": "[resourceId('Microsoft.Compute/disks', variables('Front VM Clone'))]"
            },
            "osType": "Linux",
            "caching": "ReadWrite"
          },
          "dataDisks": []
        },
        "networkProfile": {
          "networkInterfaces": [
            {
              "id": "[resourceId('Microsoft.Network/networkInterfaces', variables('Front NIC Clone'))]"
            }
          ]
        }
      },
      "resources": [],
      "dependsOn": [
        "[resourceId('Microsoft.Compute/availabilitySets', variables('Front Availability Set Name'))]",
        "[resourceId('Microsoft.Network/networkInterfaces', variables('Front NIC Clone'))]",
        "[resourceId('Microsoft.Compute/disks', variables('Front VM Clone'))]"
      ]
    }
  ]
}

Deploy it in the same resource group, with the same arguments

Validate VM

  1. Login to the Clone VM
  2. We suggest using Putty tool with SSH (SSH port is opened on NSG)
  3. Look at MyPublicIP to find the DNS of the public IP in order to SSH to it
  4. Use the port 5000 as that is the port NAT to the SSH port of the clone VM
  5. In the bash shell type
    ls
  6. You should see “myfile”, hence the snapshot of the first customization

 

Exercise

Try do the same with data disks.

Clean up

We won’t be using the resource groups we have created so we can delete them

In ISE, type Remove-AzureRmResourceGroup -Name md-demo-snapshot -Force

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One thought on “Taking a snapshot of a Managed Disk

  1. Pingback: Azure Weekly: Feb 27, 2017 – Build Azure

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