public static async Task <HttpResponseMessage> Run([HttpTrigger(AuthorizationLevel.Function, "post", Route = "VMMonitor")] HttpRequestMessage req, TraceWriter log)
{
dynamic dataobject = await req.Content.ReadAsAsync <object>();
//log.Info(dataobject.ToString());
log.Info("----------------------------------------------");
//get Azure Monitor detailed activity log
var activityLog = dataobject.data.context.activityLog;
log.Info(activityLog.ToString());
//confirm that this is indeed a VM operation
if (activityLog.operationName.ToString().StartsWith(VM_OPERATION))
{
string resourceGroup = activityLog.resourceGroupName; //get the resource group
//get the VM ID
string resourceId = activityLog.resourceId.ToString(); // returns /subscriptions/6bd0e514-c783-4dac-92d2-6788744eee7a/resourceGroups/lala3/providers/Microsoft.Compute/virtualMachines/lala3
string VMID = resourceId.Substring(resourceId.LastIndexOf('/') + 1);
var vm = await TableStorageHelper.Instance.GetVMByID(VMID);
if (vm == null)
{
log.Info($"VM {VMID} was not found in our DB, skipping");
return(req.CreateResponse(HttpStatusCode.OK));
}
if (activityLog.status == OPERATION_FAILED)
{
vm.State = VMState.Failed;
log.Error($"VM {VMID} is failed: {activityLog.subStatus}");
await TableStorageHelper.Instance.ModifyVMDetailsAsync(vm);
return(req.CreateResponse(HttpStatusCode.InternalServerError));
}
if (activityLog.status != OPERATION_SUCCEEDED)
{
log.Error($"VM {VMID} is in a state we aren't interested in: <{activityLog.status}>");
return(req.CreateResponse(HttpStatusCode.OK));
}
string operationName = (string)activityLog.operationName;
string ip;
switch (operationName)
{
case CREATE_VM_OPERATION:
log.Info($"VM with name {VMID} created");
//when the VM is finally created we need to i)set its state as Running and ii)get its Public IP
ip = await AzureAPIHelper.GetVMPublicIP(VMID, resourceGroup);
vm.State = VMState.Running;
break;
case RESTART_VM_OPERATION:
log.Info($"VM with name {VMID} rebooted");
vm.State = VMState.Running;
break;
case DEALLOCATE_VM_OPERATION:
log.Info($"VM with name {VMID} deallocated");
//when the VM is deallocated its public IP is removed, too
vm.State = VMState.Deallocated;
break;
case START_VM_OPERATION:
log.Info($"VM with name {VMID} started - was deallocated before");
//when the VM is started from deallocation it gets a new public IP, so add it to the DB
vm.IP = await AzureAPIHelper.GetVMPublicIP(VMID, resourceGroup);
vm.State = VMState.Running;
break;
}
await TableStorageHelper.Instance.ModifyVMDetailsAsync(vm);
log.Info("----------------------------------------------");
return(req.CreateResponse(HttpStatusCode.OK, $"WebHook call for VM:'{VMID}' with operation:'{activityLog.operationName}' and status:'{activityLog.status}' was successful"));
}
else
{
string msg = "No VM operation, something went wrong";
log.Error(msg);
return(req.CreateErrorResponse(HttpStatusCode.BadRequest, msg));
}
}
