/*
* Input: AzureResourceInformation, KeyVaultInformation, Logger
* Get the necessary credential information for VM management and KeyVault access.
*/
private async Task Initialize(AzureResourceInformation resourceInfo, KeyVaultInformation vault, ILogger log)
{
var azureServiceTokenProvider = new AzureServiceTokenProvider();
_kv = new KeyVaultClient(new KeyVaultClient.AuthenticationCallback(azureServiceTokenProvider.KeyVaultTokenCallback));
string _id = (await _kv.GetSecretAsync(vault.KeyVaultUri, vault.KV_SecretName_ServicePrinciple)).Value;
string _cred = (await _kv.GetSecretAsync(vault.KeyVaultUri, vault.KV_SecretName_ServicePrinciplePwd)).Value;
// Get the LabResourceGroup
resourceInfo.LabResourceGroup = ParseLabResourceGroup(resourceInfo.ResourceUri);
resourceInfo.LabName = await GetLabName(resourceInfo, log);
AzureCredentials _azureCred = SdkContext.AzureCredentialsFactory.FromServicePrincipal(
_id, _cred, resourceInfo.TenantId, AzureEnvironment.AzureGlobalCloud);
_msiazure = Azure.Authenticate(_azureCred).WithSubscription(resourceInfo.SubscriptionId);
_clientCred = new ClientCredential(_id, _cred);
var context = new AuthenticationContext($"https://login.windows.net/{resourceInfo.TenantId}", false);
var token = await context.AcquireTokenAsync("https://management.azure.com/", _clientCred);
_accessToken = token.AccessToken;
}
public AzureResourceManager(AzureResourceInformation resourceId, KeyVaultInformation kvInfo, ILogger log)
{
Initialize(resourceId, kvInfo, log).Wait();
if (!String.IsNullOrEmpty(resourceId.LabName))
{
AddIMSIToVMAsync(resourceId, kvInfo, log).Wait();
}
}
public static void Run([EventGridTrigger]EventGridEvent eventGridEvent, ILogger log)
{
// Get Environment variables.
KeyVaultInformation djSecrets = new KeyVaultInformation();
djSecrets.KeyVaultName = GetEnvironmentVariable("AzureKeyVaultName"); //azureKeyVaultName;
djSecrets.KeyVaultUri = "https://" + djSecrets.KeyVaultName + ".vault.azure.net";
djSecrets.KeyVaultResourceGroup = GetEnvironmentVariable("AzureKeyVaultResourceGroup");
djSecrets.KV_SecretName_ServicePrinciple = GetEnvironmentVariable("AzureServicePrincipalIdSecretName");
djSecrets.KV_SecretName_ServicePrinciplePwd = GetEnvironmentVariable("AzureServicePrincipalCredSecretName");
// Handle Azure Events
AzureResourceInformation resourceId = GetVmResourceId(eventGridEvent);
if (!string.IsNullOrWhiteSpace(resourceId.ResourceUri))
{
AzureResourceManager arm = new AzureResourceManager(resourceId, djSecrets, log);
}
log.LogInformation(eventGridEvent.Data.ToString());
}
// Enable the IMSI on the Vm and add the IMSI id to the keyvault access policy
public async Task AddIMSIToVMAsync(AzureResourceInformation resourceInfo, KeyVaultInformation vault, ILogger log)
{
// Handle multiple VMs in the same lab
List <string> allVms = await GetArtifactInfoAsync(resourceInfo);
if (allVms.Count > 0)
{
foreach (string vmResourceId in allVms)
{
if (!string.IsNullOrWhiteSpace(vmResourceId))
{
try
{
var vm = await _msiazure.VirtualMachines.GetByIdAsync(vmResourceId);
if (!vm.IsManagedServiceIdentityEnabled)
{
// Don't await this call as issue where hangs, handle manually below
vm.Update().WithSystemAssignedManagedServiceIdentity().ApplyAsync();
// Handle await manually.
TimeSpan timeSpan = new TimeSpan(0, 0, 10);
int counter = 0;
await Task.Delay(timeSpan);
while ((!vm.IsManagedServiceIdentityEnabled) || (String.IsNullOrEmpty(vm.SystemAssignedManagedServiceIdentityPrincipalId)))
{
counter++;
await Task.Delay(timeSpan);
log.LogInformation("[EnableVmMSIFunction] Enable IMSI loop:" + DateTime.Now.ToString());
await vm.RefreshAsync();
if (counter == 20)
{
break;
}
}
}
await vm.RefreshAsync();
// Get the keyvault
var _keyVault = _msiazure.Vaults.GetByResourceGroup(vault.KeyVaultResourceGroup, vault.KeyVaultName);
// Add access policy
await _keyVault.Update()
.DefineAccessPolicy()
.ForObjectId(vm.SystemAssignedManagedServiceIdentityPrincipalId)
.AllowSecretPermissions(SecretPermissions.Get)
.Attach()
.ApplyAsync();
// Remove after 4 min
log.LogInformation("[EnableVmMSIFunction] Cleanup:" + DateTime.Now.ToString());
await RemoveAccess(vm, _keyVault, log);
}
catch (Exception e) {
log.LogInformation("[EnableVmMSIFunction][Error] " + e.Message);
}
}
}
}
}
