public IvrStack(Construct scope, string stackId, StackProps stackProps, IvrSiteSchema schema, IEnumerable <SecurityGroupRule> securityGroupRules) : base(scope, stackId, stackProps)
{
IVpc vpc = null;
var MaxIpsPerSubnet = IvrVpcProps.MaxIpsPerSubnet;
if (!string.IsNullOrWhiteSpace(schema.VpcName))
{
vpc = Vpc.FromLookup(this, "$VPC", new VpcLookupOptions {
VpcName = schema.VpcName,
}); // will error if not found
//MaxIpsPerSubnet = ???;
}
else if (!string.IsNullOrWhiteSpace(schema.VpcId))
{
vpc = Vpc.FromLookup(this, "$VPC", new VpcLookupOptions {
VpcId = schema.VpcId,
}); // will error if not found
//MaxIpsPerSubnet = ???;
}
else if (null != schema.VpcProps)
{
// use provided props to create brand new VPC
vpc = new IvrVpc(this, $"VPC", schema.VpcProps);
}
if (schema.AddVpcS3Gateway)
{
var s3gw = new GatewayVpcEndpoint(this, $"S3GW", new GatewayVpcEndpointProps
{
Vpc = vpc,
Service = GatewayVpcEndpointAwsService.S3,
Subnets = new SubnetSelection[] { new SubnetSelection {
SubnetType = SubnetType.PUBLIC,
} },
});
}
var role = new Role(this, "IVR", new RoleProps
{
AssumedBy = new ServicePrincipal("ec2.amazonaws.com"),
InlinePolicies = new IvrInlinePolicies(stackProps.Env.Account, stackId, schema),
});
// Configure inbound security for RDP (and more?)
var securityGroup = new SecurityGroup(this, $"Ingress", new SecurityGroupProps
{
Vpc = vpc,
AllowAllOutbound = schema.AllowAllOutbound,
});
securityGroupRules.ForEach(rule => securityGroup.WithSecurityGroupRule(rule));
if (schema.AllowAllIntranet)
{
securityGroup.WithSecurityGroupRule(new IngressRule(Peer.Ipv4($"{vpc.VpcCidrBlock}"), Port.AllTraffic()).WithDescription($"All intranet traffic"));
}
// Finally - create our instances!
var hosts = new List <HostInstance>();
for (var subnetIndex = 0; ++subnetIndex <= Math.Min(vpc.PublicSubnets.Length, schema.MaxSubnets);)
{
var hostIndexInSubnet = 0;
foreach (var group in schema.HostGroups)
{
var numberOfHosts = Math.Min(group.HostCount, MaxIpsPerSubnet);
if (numberOfHosts != group.HostCount)
{
Console.WriteLine($"Group({group.Name}) host count changed from {group.HostCount} to {numberOfHosts}");
group.HostCount = numberOfHosts;
}
var instanceProps = IvrInstanceProps.InstanceProps(vpc, vpc.PublicSubnets[subnetIndex - 1], role, securityGroup, group.InstanceProps);
for (var hostCount = 0; ++hostCount <= numberOfHosts; ++hostIndexInSubnet)
{
var hostName = $"{schema.HostNamePrefix}{subnetIndex}{hostIndexInSubnet:00}";
var hostPrimingProps = new HostPrimingProps
{
HostName = hostName.AsWindowsComputerName(), // must fit into 15 chars
WorkingFolder = $"{stackId}".AsWindowsFolder(),
AwsAccount = stackProps.Env.Account,
AwsRoleName = role.RoleName,
RdpProps = schema.RdpProps,
EC2Users = schema.EC2Users,
DownloadAndInstall = group.DownloadAndInstall,
S3iArgs = $"{group.InstallS3i} --verbose",
};
var hostCommands = HostPriming.PrimeForS3i(hostPrimingProps)
.WithFirewallAllowInbound($"{vpc.VpcCidrBlock}");
hostCommands.WithRenameAndRestart(hostPrimingProps.HostName);
instanceProps.KeyName = schema.KeyPairName;
instanceProps.UserData = hostCommands.UserData;
hosts.Add(new HostInstance
{
Group = group,
Instance = new Instance_(this, hostName.AsCloudFormationId(), instanceProps),
});
}
}
}
// associate pre-allocated EIPs
var preAllocatedEIPs = schema.PreAllocatedElasticIPs?.SelectMany(s => s.Csv()).ToList() ?? new List <string> {
};
var hostsThatRequireEIP = hosts.Where(h => h.Group.UsePreAllocatedElasticIPs).ToList();
if (preAllocatedEIPs.Count < hostsThatRequireEIP.Count)
{
throw new ArgumentException($"Pre-Allocated Elastic IPs needed: {hostsThatRequireEIP.Count()}, but only {preAllocatedEIPs.Count()} configured in schema.{nameof(IvrSiteSchema.PreAllocatedElasticIPs)}");
}
var elasticIPAssociations = hostsThatRequireEIP.Zip(preAllocatedEIPs, (h, a) =>
{
return(new CfnEIPAssociation(this, $"EIPA{h.Instance.InstancePrivateIp}".AsCloudFormationId(), new CfnEIPAssociationProps
{
AllocationId = a,
InstanceId = h.Instance.InstanceId,
}));
}).ToList(); // execute LINQ now
// We have schema.Domain registered in advance
if (!string.IsNullOrWhiteSpace(schema.HostedZoneDomain))
{
var theZone = HostedZone.FromLookup(this, $"{stackId}_Zone_", new HostedZoneProviderProps
{
DomainName = schema.HostedZoneDomain,
//Comment = "HostedZone created by Route53 Registrar",
});
// assign new Elastic IPs as needed
if (!string.IsNullOrWhiteSpace(schema.SubdomainEIPs))
{
var newElasticIPs = hosts.Where(h => h.Group.AllocateNewElasticIPs).Select(h =>
{
return(new CfnEIP(this, $"EIP{h.Instance.InstancePrivateIp}".AsCloudFormationId(), new CfnEIPProps
{
// 'standard' or 'vpc': https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-ec2-eip.html#cfn-ec2-eip-domain
Domain = "vpc",
InstanceId = h.Instance.InstanceId,
}));
}).ToList(); // collect them now to prevent LINQ side effects
if (newElasticIPs.Any())
{
// Register public Elastic IPs
var arNewPublic = new ARecord(this, $"ARecord_Public_NewAlloc".AsCloudFormationId(), new ARecordProps
{
Zone = theZone,
RecordName = $"{schema.SubdomainEIPs}.{theZone.ZoneName}",
Target = RecordTarget.FromValues(newElasticIPs.Select(eip => eip.Ref).ToArray()),
Ttl = Duration.Seconds(300),
});
}
else if (elasticIPAssociations.Any())
{
// Register public Elastic IPs
/*
* var arPrePublic = new ARecord(this, $"ARecord_Public_PreAlloc".AsCloudFormationId(), new ARecordProps
* {
* Zone = theZone,
* RecordName = $"{schema.SubdomainEIPs}.{theZone.ZoneName}",
* Target = RecordTarget.FromValues(elasticIPAssociations.Select(eipa => eipa.Ref).ToArray()), // ***** how to do that?
* Ttl = Duration.Seconds(300),
* });
*/
foreach (var a in elasticIPAssociations)
{
Console.WriteLine($"Pre-Allocated Elastic IP Associations: {a.AllocationId}/{a.InstanceId}, {a.Eip}/{a.PrivateIpAddress}, {a.Ref} - please put it to {schema.SubdomainEIPs}.{theZone.ZoneName} ARecord manually");
}
}
}
if (0 < hosts.Count && !string.IsNullOrWhiteSpace(schema.SubdomainHosts))
{
// Register private IPs (never changing, as opposed to public - which change on stop/start) addresses of all hosts
var arPrivate = new ARecord(this, $"ARecord_Private_".AsCloudFormationId(), new ARecordProps
{
Zone = theZone,
RecordName = $"{schema.SubdomainHosts}.{theZone.ZoneName}",
Target = RecordTarget.FromIpAddresses(hosts.Select(h => h.Instance.InstancePrivateIp).ToArray()),
Ttl = Duration.Seconds(300),
});
}
//throw new Exception();
}
}