async IAsyncEnumerable <DescribeAutoScalingGroupsResponse> IPaginator <DescribeAutoScalingGroupsResponse> .PaginateAsync(CancellationToken cancellationToken = default)
{
if (Interlocked.Exchange(ref _isPaginatorInUse, 1) != 0)
{
throw new System.InvalidOperationException("Paginator has already been consumed and cannot be reused. Please create a new instance.");
}
var nextToken = _request.NextToken;
DescribeAutoScalingGroupsResponse response;
do
{
_request.NextToken = nextToken;
response = await _client.DescribeAutoScalingGroupsAsync(_request, cancellationToken).ConfigureAwait(false);
nextToken = response.NextToken;
cancellationToken.ThrowIfCancellationRequested();
yield return(response);
}while (nextToken != null);
}
protected override async Task<IEnumerable<AutoScalingGroup>> FetchResources()
{
var results = new List<IEnumerable<AutoScalingGroup>>();
string marker = null;
do
{
var response = await _client.DescribeAutoScalingGroupsAsync(
new DescribeAutoScalingGroupsRequest
{
NextToken = marker
});
results.Add(response.AutoScalingGroups);
marker = response.NextToken;
}
while (!string.IsNullOrEmpty(marker));
return results.SelectMany(x => x).ToList();
}
private Amazon.AutoScaling.Model.DescribeAutoScalingGroupsResponse CallAWSServiceOperation(IAmazonAutoScaling client, Amazon.AutoScaling.Model.DescribeAutoScalingGroupsRequest request)
{
Utils.Common.WriteVerboseEndpointMessage(this, client.Config, "AWS Auto Scaling", "DescribeAutoScalingGroups");
try
{
#if DESKTOP
return(client.DescribeAutoScalingGroups(request));
#elif CORECLR
return(client.DescribeAutoScalingGroupsAsync(request).GetAwaiter().GetResult());
#else
#error "Unknown build edition"
#endif
}
catch (AmazonServiceException exc)
{
var webException = exc.InnerException as System.Net.WebException;
if (webException != null)
{
throw new Exception(Utils.Common.FormatNameResolutionFailureMessage(client.Config, webException.Message), webException);
}
throw;
}
}
public virtual async Task Failover()
{
try
{
Console.WriteLine($"Simulating AZ failure for {azName}");
// Find all subnets in the availability zone passed in the input
DescribeSubnetsResponse subnetsInSpecifiedAZandVpc
= await ec2Client.DescribeSubnetsAsync(new DescribeSubnetsRequest()
{
Filters = new List <Amazon.EC2.Model.Filter> {
new Amazon.EC2.Model.Filter {
Name = "vpc-id",
Values = { vpcId }
},
new Amazon.EC2.Model.Filter {
Name = "availability-zone",
Values = { azName }
}
}
});
List <string> subnetIdsInSpecifiedAZ = subnetsInSpecifiedAZandVpc.Subnets.Select(x => x.SubnetId).ToList();
// Modify the autoscaling group to remove the AZ affected which is the AZ passed in the input
// Find the autoscaling group that this is deployed into
DescribeAutoScalingGroupsResponse autoScalingGroupsResponse = await asClient.DescribeAutoScalingGroupsAsync();
if (autoScalingGroupsResponse != null && autoScalingGroupsResponse.AutoScalingGroups.Count > 0)
{
// Note: This assumes an Auto Scaling group exists; no error checking for readability
AutoScalingGroup autoScalingGroup = autoScalingGroupsResponse.AutoScalingGroups[0];
Console.WriteLine($"Updating the auto scaling group {autoScalingGroup.AutoScalingGroupName} to remove the subnet in {azName}");
UpdateAutoScalingGroupResponse updateAutoScalingGroupResponse
= await asClient.UpdateAutoScalingGroupAsync(new UpdateAutoScalingGroupRequest
{
AutoScalingGroupName = autoScalingGroup.AutoScalingGroupName,
VPCZoneIdentifier = String.Join(",", autoScalingGroup.VPCZoneIdentifier.Split(',').Where(x => !subnetIdsInSpecifiedAZ.Contains(x)))
});
}
Console.WriteLine("Creating new network ACL associations");
await BlockSubnetsInAZ(vpcId, subnetIdsInSpecifiedAZ);
Console.WriteLine("Failing over database");
//fail over rds which is in the same AZ
DescribeDBInstancesResponse describeDBInstancesResult = await rdsClient.DescribeDBInstancesAsync();
string dbInstancedId = describeDBInstancesResult.DBInstances.Where(x => String.Equals(x.DBSubnetGroup.VpcId, vpcId, StringComparison.OrdinalIgnoreCase) &&
String.Equals(x.AvailabilityZone, azName, StringComparison.OrdinalIgnoreCase) &&
x.MultiAZ &&
!x.StatusInfos.Any())?.Select(x => x.DBInstanceIdentifier).FirstOrDefault();
// we want to fail over rds if rds is present in the same az where it is affected
if (!String.IsNullOrEmpty(dbInstancedId))
{
Console.WriteLine("Rebooting dbInstanceId to secondary AZ " + dbInstancedId);
var response = await rdsClient.RebootDBInstanceAsync(new RebootDBInstanceRequest()
{
DBInstanceIdentifier = dbInstancedId,
ForceFailover = true
});
}
else
{
Console.WriteLine($"Didn't find DB in the same AZ as {azName}");
}
Console.Write("Done");
}
catch (Exception exception)
{
Console.WriteLine("Unknown exception occurred " + exception.Message);
}
}
public LogAutoscalingEvent(IElasticLowLevelClient es, IAmazonAutoScaling asg, LogToElasticsearch logToEs) : base(request =>
(from asgEvent in Observable.Return(request)
let asgName = asgEvent.SelectToken("detail.AutoScalingGroupName")?.Value <string>()
where !string.IsNullOrEmpty(asgName)
let describeRequest = new DescribeAutoScalingGroupsRequest
{
AutoScalingGroupNames = new List <string> {
asgName
}
}
from describeResponse in asg.DescribeAutoScalingGroupsAsync(describeRequest)
from description in describeResponse.AutoScalingGroups
let tags = description.Tags
let app = tags.GetValue("repo") ?? tags.GetValue("Application") ?? tags.GetValue("app")
let env = tags.GetValue("env") ?? tags.GetValue("Environment")
let sha = tags.GetValue("sha")
let log = new
{
Name = asgEvent["detail-type"]?.Value <string>(),
RequestId = asgName,
Message = asgEvent
}
let time = asgEvent["time"].Value <DateTime>()
let alteredLog = new AlteredLog
{
Time = time,
Repo = app,
Env = env,
Sha = sha,
Log = JObject.FromObject(log, AlteredJson.DefaultJsonSerializer)
}
from response in logToEs.Execute(alteredLog)
select response).ToTask())
{
}