public async Task <IHost[]> LaunchAsync(Cluster cluster, ISecurityContext context)
{
Validate.NotNull(cluster, nameof(cluster));
Validate.NotNull(context, nameof(context));
var zoneId = LocationId.Create(cluster.LocationId).WithZoneNumber(1);
var zone = Locations.Get(zoneId);
// TODO:
// if the location is a region, balance hosts within available zones
var template = await hostTemplateService.GetAsync(cluster.HostTemplateId);
var request = new LaunchHostRequest(cluster, zone, template);
return(await LaunchAsync(request, context));;
}
public async Task <IHost[]> LaunchAsync(LaunchHostRequest launchRequest, ISecurityContext context)
{
Validate.NotNull(launchRequest, nameof(launchRequest));
Validate.NotNull(context, nameof(context));
var zoneId = LocationId.Create(launchRequest.Location.Id);
if (zoneId.ZoneNumber == 0)
{
throw new Exception("Must launch within in availability zone. Was a region:" + launchRequest.Location.Name);
}
var cluster = launchRequest.Cluster;
var zone = launchRequest.Location;
var template = launchRequest.Template;
var region = Locations.Get(zoneId.WithZoneNumber(0));
var image = await imageService.GetAsync(template.ImageId);;
var machineType = AwsInstanceType.Get(template.MachineTypeId);
var request = new RunInstancesRequest {
ClientToken = Guid.NewGuid().ToString(),
InstanceType = machineType.Name,
ImageId = image.ResourceId,
MinCount = launchRequest.LaunchCount,
MaxCount = launchRequest.LaunchCount,
Placement = new Placement(availabilityZone: zone.Name),
TagSpecifications = new[] {
new TagSpecification(
resourceType: "instance",
tags: new[] { new Amazon.Ec2.Tag("envId", cluster.EnvironmentId.ToString()) }
)
}
};
var startupScript = launchRequest.StartupScript ?? template.StartupScript;
if (startupScript != null)
{
request.UserData = Convert.ToBase64String(Encoding.UTF8.GetBytes(startupScript));
}
#region AWS Specific Properties
foreach (var property in template.Properties)
{
switch (property.Key)
{
case HostTemplateProperties.IamRole:
// NOTE: This requires the PassRole permission
// https://aws.amazon.com/blogs/security/granting-permission-to-launch-ec2-instances-with-iam-roles-passrole-permission/
request.IamInstanceProfile = new IamInstanceProfileSpecification(property.Value);
break;
case HostTemplateProperties.KernelId:
request.KernelId = property.Value;
break;
case HostTemplateProperties.SecurityGroupIds:
request.SecurityGroupIds = property.Value.ToArrayOf <string>();
break;
case HostTemplateProperties.EbsOptimized:
request.EbsOptimized = (bool)property.Value;
break;
case HostTemplateProperties.Monitoring:
request.Monitoring = new RunInstancesMonitoringEnabled((bool)property.Value);
break;
case HostTemplateProperties.Volume:
var volSpec = property.Value.As <AwsVolumeSpecification>();
// TODO: Device Name
request.BlockDeviceMappings = new[] {
new BlockDeviceMapping(BlockDeviceNames.Root, new EbsBlockDevice(
volumeType: volSpec.Type,
volumeSize: (int)volSpec.Size
))
};
break;
case HostTemplateProperties.KeyName:
request.KeyName = property.Value;
break;
}
}
#endregion
var runInstancesResponse = await ec2.RunInstancesAsync(request);;
var hosts = new IHost[runInstancesResponse.Instances.Length];
for (var i = 0; i < hosts.Length; i++)
{
var registerRequest = await GetRegistrationAsync(
instance : runInstancesResponse.Instances[i],
cluster : cluster,
image : image,
machineType : machineType,
location : zone
);
hosts[i] = await hostService.RegisterAsync(registerRequest);;
}
#region Logging
await eventLog.CreateAsync(new Event(
action : "launch",
resource : "hosts",
userId : context.UserId)
);;
#endregion
return(hosts);
}
