/// <summary>
/// Unmarshaller the response from the service to the response class.
/// </summary>
/// <param name="context"></param>
/// <returns></returns>
public override AmazonWebServiceResponse Unmarshall(XmlUnmarshallerContext context)
{
CreateNetworkAclResponse response = new CreateNetworkAclResponse();
int originalDepth = context.CurrentDepth;
int targetDepth = originalDepth + 1;
if (context.IsStartOfDocument)
{
targetDepth = 2;
}
while (context.ReadAtDepth(originalDepth))
{
if (context.IsStartElement || context.IsAttribute)
{
if (context.TestExpression("networkAcl", targetDepth))
{
var unmarshaller = NetworkAclUnmarshaller.Instance;
response.NetworkAcl = unmarshaller.Unmarshall(context);
continue;
}
}
}
return(response);
}
private async Task BlockSubnetsInAZ(string vpcId, List <string> subnetIds)
{
//Find all existing network acl associations matching the subnets identified above
DescribeNetworkAclsResponse describeNetworkAclsResult
= await ec2Client.DescribeNetworkAclsAsync(new DescribeNetworkAclsRequest()
{
Filters = new List <Amazon.EC2.Model.Filter> {
new Amazon.EC2.Model.Filter {
Name = "association.subnet-id",
Values = subnetIds
}
}
});
// The describe will return all associations of an ACL, which can be associated with a subnet not in the filter
IEnumerable <string> associationsToUpdate = describeNetworkAclsResult.NetworkAcls.SelectMany(x => x.Associations).Where(x => subnetIds.Contains(x.SubnetId)).Select(x => x.NetworkAclAssociationId);
//create new network acl
CreateNetworkAclResponse createNetworkAclResponse = await ec2Client.CreateNetworkAclAsync(new CreateNetworkAclRequest()
{
VpcId = vpcId
});
// add both ingress and egress denying to all the traffic to the new ACL
string networkAclId = createNetworkAclResponse.NetworkAcl.NetworkAclId;
await CreateNetworkAclEntry(networkAclId, 100, "0.0.0.0/0", true, "-1", CreatePortRange(0, 65535), RuleAction.Deny);
await CreateNetworkAclEntry(networkAclId, 101, "0.0.0.0/0", false, "-1", CreatePortRange(0, 65535), RuleAction.Deny);
// update all subnets to be associated with the new ACL
foreach (string existingAssociation in associationsToUpdate)
{
// associates the specified network ACL with the subnet for the specified network ACL association
ReplaceNetworkAclAssociationResponse replaceNetworkAclAssociationResponse
= await ec2Client.ReplaceNetworkAclAssociationAsync(new ReplaceNetworkAclAssociationRequest()
{
AssociationId = existingAssociation,
NetworkAclId = networkAclId
});
}
}
public override AmazonWebServiceResponse Unmarshall(XmlUnmarshallerContext context)
{
CreateNetworkAclResponse response = new CreateNetworkAclResponse();
int targetDepth = 2;
while (context.Read())
{
if (context.IsStartElement || context.IsAttribute)
{
if (context.TestExpression("networkAcl", targetDepth))
{
response.NetworkAcl = NetworkAclUnmarshaller.GetInstance().Unmarshall(context);
continue;
}
}
}
return(response);
}
public static CreateNetworkAclResponse Unmarshall(UnmarshallerContext _ctx)
{
CreateNetworkAclResponse createNetworkAclResponse = new CreateNetworkAclResponse();
createNetworkAclResponse.HttpResponse = _ctx.HttpResponse;
createNetworkAclResponse.RequestId = _ctx.StringValue("CreateNetworkAcl.RequestId");
createNetworkAclResponse.NetworkAclId = _ctx.StringValue("CreateNetworkAcl.NetworkAclId");
CreateNetworkAclResponse.CreateNetworkAcl_NetworkAclAttribute networkAclAttribute = new CreateNetworkAclResponse.CreateNetworkAcl_NetworkAclAttribute();
networkAclAttribute.NetworkAclId = _ctx.StringValue("CreateNetworkAcl.NetworkAclAttribute.NetworkAclId");
networkAclAttribute.RegionId = _ctx.StringValue("CreateNetworkAcl.NetworkAclAttribute.RegionId");
networkAclAttribute.NetworkAclName = _ctx.StringValue("CreateNetworkAcl.NetworkAclAttribute.NetworkAclName");
networkAclAttribute.Description = _ctx.StringValue("CreateNetworkAcl.NetworkAclAttribute.Description");
networkAclAttribute.VpcId = _ctx.StringValue("CreateNetworkAcl.NetworkAclAttribute.VpcId");
networkAclAttribute.CreationTime = _ctx.StringValue("CreateNetworkAcl.NetworkAclAttribute.CreationTime");
networkAclAttribute.Status = _ctx.StringValue("CreateNetworkAcl.NetworkAclAttribute.Status");
List <CreateNetworkAclResponse.CreateNetworkAcl_NetworkAclAttribute.CreateNetworkAcl_IngressAclEntry> networkAclAttribute_ingressAclEntries = new List <CreateNetworkAclResponse.CreateNetworkAcl_NetworkAclAttribute.CreateNetworkAcl_IngressAclEntry>();
for (int i = 0; i < _ctx.Length("CreateNetworkAcl.NetworkAclAttribute.IngressAclEntries.Length"); i++)
{
CreateNetworkAclResponse.CreateNetworkAcl_NetworkAclAttribute.CreateNetworkAcl_IngressAclEntry ingressAclEntry = new CreateNetworkAclResponse.CreateNetworkAcl_NetworkAclAttribute.CreateNetworkAcl_IngressAclEntry();
ingressAclEntry.NetworkAclEntryId = _ctx.StringValue("CreateNetworkAcl.NetworkAclAttribute.IngressAclEntries[" + i + "].NetworkAclEntryId");
ingressAclEntry.Policy = _ctx.StringValue("CreateNetworkAcl.NetworkAclAttribute.IngressAclEntries[" + i + "].Policy");
ingressAclEntry.Protocol = _ctx.StringValue("CreateNetworkAcl.NetworkAclAttribute.IngressAclEntries[" + i + "].Protocol");
ingressAclEntry.SourceCidrIp = _ctx.StringValue("CreateNetworkAcl.NetworkAclAttribute.IngressAclEntries[" + i + "].SourceCidrIp");
ingressAclEntry.Port = _ctx.StringValue("CreateNetworkAcl.NetworkAclAttribute.IngressAclEntries[" + i + "].Port");
ingressAclEntry.EntryType = _ctx.StringValue("CreateNetworkAcl.NetworkAclAttribute.IngressAclEntries[" + i + "].EntryType");
ingressAclEntry.NetworkAclEntryName = _ctx.StringValue("CreateNetworkAcl.NetworkAclAttribute.IngressAclEntries[" + i + "].NetworkAclEntryName");
ingressAclEntry.Description = _ctx.StringValue("CreateNetworkAcl.NetworkAclAttribute.IngressAclEntries[" + i + "].Description");
networkAclAttribute_ingressAclEntries.Add(ingressAclEntry);
}
networkAclAttribute.IngressAclEntries = networkAclAttribute_ingressAclEntries;
List <CreateNetworkAclResponse.CreateNetworkAcl_NetworkAclAttribute.CreateNetworkAcl_EgressAclEntry> networkAclAttribute_egressAclEntries = new List <CreateNetworkAclResponse.CreateNetworkAcl_NetworkAclAttribute.CreateNetworkAcl_EgressAclEntry>();
for (int i = 0; i < _ctx.Length("CreateNetworkAcl.NetworkAclAttribute.EgressAclEntries.Length"); i++)
{
CreateNetworkAclResponse.CreateNetworkAcl_NetworkAclAttribute.CreateNetworkAcl_EgressAclEntry egressAclEntry = new CreateNetworkAclResponse.CreateNetworkAcl_NetworkAclAttribute.CreateNetworkAcl_EgressAclEntry();
egressAclEntry.NetworkAclEntryId = _ctx.StringValue("CreateNetworkAcl.NetworkAclAttribute.EgressAclEntries[" + i + "].NetworkAclEntryId");
egressAclEntry.Policy = _ctx.StringValue("CreateNetworkAcl.NetworkAclAttribute.EgressAclEntries[" + i + "].Policy");
egressAclEntry.Protocol = _ctx.StringValue("CreateNetworkAcl.NetworkAclAttribute.EgressAclEntries[" + i + "].Protocol");
egressAclEntry.DestinationCidrIp = _ctx.StringValue("CreateNetworkAcl.NetworkAclAttribute.EgressAclEntries[" + i + "].DestinationCidrIp");
egressAclEntry.Port = _ctx.StringValue("CreateNetworkAcl.NetworkAclAttribute.EgressAclEntries[" + i + "].Port");
egressAclEntry.EntryType = _ctx.StringValue("CreateNetworkAcl.NetworkAclAttribute.EgressAclEntries[" + i + "].EntryType");
egressAclEntry.Description = _ctx.StringValue("CreateNetworkAcl.NetworkAclAttribute.EgressAclEntries[" + i + "].Description");
egressAclEntry.NetworkAclEntryName = _ctx.StringValue("CreateNetworkAcl.NetworkAclAttribute.EgressAclEntries[" + i + "].NetworkAclEntryName");
networkAclAttribute_egressAclEntries.Add(egressAclEntry);
}
networkAclAttribute.EgressAclEntries = networkAclAttribute_egressAclEntries;
List <CreateNetworkAclResponse.CreateNetworkAcl_NetworkAclAttribute.CreateNetworkAcl_Resource> networkAclAttribute_resources = new List <CreateNetworkAclResponse.CreateNetworkAcl_NetworkAclAttribute.CreateNetworkAcl_Resource>();
for (int i = 0; i < _ctx.Length("CreateNetworkAcl.NetworkAclAttribute.Resources.Length"); i++)
{
CreateNetworkAclResponse.CreateNetworkAcl_NetworkAclAttribute.CreateNetworkAcl_Resource resource = new CreateNetworkAclResponse.CreateNetworkAcl_NetworkAclAttribute.CreateNetworkAcl_Resource();
resource.ResourceId = _ctx.StringValue("CreateNetworkAcl.NetworkAclAttribute.Resources[" + i + "].ResourceId");
resource.ResourceType = _ctx.StringValue("CreateNetworkAcl.NetworkAclAttribute.Resources[" + i + "].ResourceType");
resource.Status = _ctx.StringValue("CreateNetworkAcl.NetworkAclAttribute.Resources[" + i + "].Status");
networkAclAttribute_resources.Add(resource);
}
networkAclAttribute.Resources = networkAclAttribute_resources;
createNetworkAclResponse.NetworkAclAttribute = networkAclAttribute;
return(createNetworkAclResponse);
}
public virtual void failover()
{
try
{
// Modify the autoscaling group to remove the AZ affected which is the AZ passed in the input
// Find the autoscaling group that this is deployed into
// Note: This changes the asynchronous call to a synchronous one
DescribeAutoScalingGroupsResponse autoScalingGroupsResponse = AUTO_SCALING_CLIENT.DescribeAutoScalingGroupsAsync().GetAwaiter().GetResult();
if (autoScalingGroupsResponse != null && autoScalingGroupsResponse.AutoScalingGroups.Count > 0)
{
// Note: This assumes an Auto Scaling group exists; no error checking for readability
AutoScalingGroup autoScalingGroup = autoScalingGroupsResponse.AutoScalingGroups[0];
string autoScalingGroupName = autoScalingGroup.AutoScalingGroupName;
// Find all subnets in the availability zone passed in the input
DescribeSubnetsResponse subnetsResult
= EC2_CLIENT.DescribeSubnetsAsync(new DescribeSubnetsRequest()
{
Filters = new List <Amazon.EC2.Model.Filter> {
new Amazon.EC2.Model.Filter {
Name = "vpc-id",
Values = new List <string> {
vpcId
}
}
}
}).GetAwaiter().GetResult();
IList <string> desiredSubnetsForASG = new List <string>();
foreach (Amazon.EC2.Model.Subnet subnet in subnetsResult.Subnets)
{
if (!string.Equals(subnet.AvailabilityZone, azId, StringComparison.OrdinalIgnoreCase))
{
desiredSubnetsForASG.Add(subnet.SubnetId);
}
}
List <string> desiredSubnets = new List <String>(autoScalingGroup.VPCZoneIdentifier.Split(new[] { ',' }, StringSplitOptions.None));
var tempList = new List <String>(desiredSubnets);
foreach (var subnet in desiredSubnets)
{
if (!desiredSubnetsForASG.Contains(subnet))
{
tempList.Remove(subnet);
}
}
desiredSubnets = tempList;
Console.WriteLine("Updating the auto scaling group " + autoScalingGroupName + " to remove the subnet in the AZ");
// Note: This turns the asynchronous call into a synchronous one
UpdateAutoScalingGroupResponse updateAutoScalingGroupResponse
= AUTO_SCALING_CLIENT.UpdateAutoScalingGroupAsync(new UpdateAutoScalingGroupRequest
{
AutoScalingGroupName = autoScalingGroupName,
VPCZoneIdentifier = string.Join(",", desiredSubnets)
}).GetAwaiter().GetResult();
}
// Find all subnets in the availability zone passed in the input
// Note: This turns the asynchronous call into a synchronous one
DescribeSubnetsResponse describeSubnetsResult
= EC2_CLIENT.DescribeSubnetsAsync(new DescribeSubnetsRequest
{
Filters = new List <Amazon.EC2.Model.Filter> {
new Amazon.EC2.Model.Filter {
Name = "vpc-id",
Values = new List <string> {
vpcId
}
},
new Amazon.EC2.Model.Filter {
Name = "availabilityZone",
Values = new List <string> {
azId
}
}
}
}).GetAwaiter().GetResult();
IList <string> desiredSubnetsForAddingNewNacl = new List <string>();
foreach (Amazon.EC2.Model.Subnet subnet in describeSubnetsResult.Subnets)
{
desiredSubnetsForAddingNewNacl.Add(subnet.SubnetId);
}
//Find all the network acl associations matching the subnets identified above
// Note: This turns the asynchronous call into a synchronous one
DescribeNetworkAclsResponse describeNetworkAclsResult
= EC2_CLIENT.DescribeNetworkAclsAsync(new DescribeNetworkAclsRequest()
{
Filters = new List <Amazon.EC2.Model.Filter> {
new Amazon.EC2.Model.Filter {
Name = "association.subnet-id",
Values = (List <string>)desiredSubnetsForAddingNewNacl
}
}
}).GetAwaiter().GetResult();
IList <NetworkAclAssociation> desiredAclAssociations = new List <NetworkAclAssociation>();
// Note: This assumes a Network ACL is present for readability
IList <NetworkAclAssociation> networkAclsAssociatedWithSubnet = describeNetworkAclsResult.NetworkAcls[0].Associations;
foreach (string subnetId in desiredSubnetsForAddingNewNacl)
{
foreach (NetworkAclAssociation networkAcl in networkAclsAssociatedWithSubnet)
{
if (string.Equals(networkAcl.SubnetId, subnetId, StringComparison.OrdinalIgnoreCase))
{
desiredAclAssociations.Add(networkAcl);
}
}
}
//create new network acl association with both ingress and egress denying to all the traffic
CreateNetworkAclRequest createNetworkAclRequest = new CreateNetworkAclRequest();
createNetworkAclRequest.VpcId = vpcId;
// Note: This turns the asynchronous call into a synchronous one
CreateNetworkAclResponse createNetworkAclResponse = EC2_CLIENT.CreateNetworkAclAsync(createNetworkAclRequest).GetAwaiter().GetResult();
string networkAclId = createNetworkAclResponse.NetworkAcl.NetworkAclId;
createNetworkAclEntry(networkAclId, 100, "0.0.0.0/0", true, "-1", createPortRange(0, 65535), RuleAction.Deny);
createNetworkAclEntry(networkAclId, 101, "0.0.0.0/0", false, "-1", createPortRange(0, 65535), RuleAction.Deny);
// replace all the network acl associations identified for the above subnets with the new network
// acl association which will deny all traffic for those subnets in that AZ
Console.WriteLine("Creating new network ACL associations");
replaceNetworkAclAssociations(desiredAclAssociations, networkAclId);
//fail over rds which is in the same AZ
// Note: This turns the asynchronous call into a synchronous one
DescribeDBInstancesResponse describeDBInstancesResult = RDS_CLIENT.DescribeDBInstancesAsync().GetAwaiter().GetResult();
IList <DBInstance> dbInstances = describeDBInstancesResult.DBInstances;
string dbInstancedId = null;
foreach (DBInstance dbInstance in dbInstances)
{
if (string.Equals(dbInstance.DBSubnetGroup.VpcId, vpcId, StringComparison.OrdinalIgnoreCase) &&
(string.Equals(dbInstance.AvailabilityZone, azId, StringComparison.OrdinalIgnoreCase)) &&
dbInstance.MultiAZ && dbInstance.StatusInfos.Count == 0)
{
dbInstancedId = dbInstance.DBInstanceIdentifier;
}
}
// we want to fail over rds if rds is present in the same az where it is affected
if (!string.IsNullOrEmpty(dbInstancedId))
{
RebootDBInstanceRequest rebootDBInstanceRequest = new RebootDBInstanceRequest();
rebootDBInstanceRequest.DBInstanceIdentifier = dbInstancedId;
rebootDBInstanceRequest.ForceFailover = true;
Console.WriteLine("Rebooting dbInstanceId to secondary AZ " + dbInstancedId);
// Note: This turns the asynchronous call into a synchronous one
RDS_CLIENT.RebootDBInstanceAsync(rebootDBInstanceRequest).GetAwaiter().GetResult();
}
}
catch (Exception exception)
{
Console.WriteLine("Unkown exception occured " + exception.Message);
}
}
