private static async Task <List <EcsTask> > DescribeTasks(
AmazonECSClient ecsClient,
string cluster,
List <string> taskArns,
CancellationToken token)
{
var include = new List <string> {
TaskField.TAGS
};
var accumulator = new List <EcsTask>();
// split batch into chunks of 100 requests
var lists = taskArns
.Select((value, index) => new { value, index })
.GroupBy(x => x.index / 100)
.Select(x => x.Select(v => v.value).ToList());
foreach (var arns in lists)
{
var response = await ecsClient.DescribeTasksAsync(new DescribeTasksRequest
{
Cluster = cluster,
Tasks = arns,
Include = include
}, token);
accumulator.AddRange(response.Tasks);
}
return(accumulator);
}
// **Step 2** Look up the current container's status via AWS SDK
public static Boolean QuerySdkTaskStatus(string cluster, string uuid)
{
Boolean taskSdkStatus = false;
AmazonECSClient ecs = new AmazonECSClient();
Task <DescribeTasksResponse> response = ecs.DescribeTasksAsync(
new DescribeTasksRequest
{
Cluster = cluster,
Tasks = new List <string> {
uuid
}
}
);
// this will run until completion or until task is killed due to timeout
while (response.Status != TaskStatus.RanToCompletion)
{
// failure possible if container doesn't have access to 'ecs.DescribeTasks'
if (response.Status == TaskStatus.Faulted)
{
Console.WriteLine("Error in getting a response from request.");
break;
}
}
if (response.Result.Tasks.Count > 0)
{
Amazon.ECS.Model.Task currentTask = response.Result.Tasks[0];
Console.WriteLine("Task stopped reason: {0}", currentTask.StoppedReason);
if (!ValidTaskStopReason(currentTask.StoppedReason))
{
taskSdkStatus = true;
}
else
{
Console.WriteLine("Task has stopped with valid reason: {0}", currentTask.StoppedReason);
}
}
return(taskSdkStatus);
}
public static async Task <string> GetContainerHostUrlAsync(IConfiguration configuration, string scheme = "http")
{
try
{
// This implementation is for local.
var gatewayUrl = configuration["GATEWAY_URL"];
if (!string.IsNullOrWhiteSpace(gatewayUrl))
{
return(gatewayUrl);
}
// Following implementation is for AWS-ECS.
var uri = configuration["ECS_CONTAINER_METADATA_URI"];
if (string.IsNullOrWhiteSpace(uri))
{
throw new InvalidOperationException("ECS_CONTAINER_METADATA_URI does not exist.");
}
using (var client = new HttpClient())
{
var response = await client.GetAsync(uri);
var content = await response.Content.ReadAsStringAsync();
var json = JObject.Parse(content);
var cluster = json["Labels"]["com.amazonaws.ecs.cluster"].ToString();
var taskArn = json["Labels"]["com.amazonaws.ecs.task-arn"].ToString();
var ecs = new AmazonECSClient();
var request = new DescribeTasksRequest {
Cluster = cluster, Tasks = new List <string> {
taskArn
}
};
var tasks = await ecs.DescribeTasksAsync(request);
var container = tasks.Tasks[0].Containers[0];
var address = container.NetworkInterfaces[0].PrivateIpv4Address;
if (container.NetworkBindings.Any())
{
var port = container.NetworkBindings[0].HostPort;
return($"{scheme}://{address}:{port}/");
}
else
{
var taskDef = await ecs.DescribeTaskDefinitionAsync(
new DescribeTaskDefinitionRequest
{
TaskDefinition = tasks.Tasks[0].TaskDefinitionArn
});
var port = taskDef.TaskDefinition.ContainerDefinitions[0].PortMappings[0].HostPort;
return($"{scheme}://{address}:{port}/");
}
}
}
catch (Exception e)
{
Console.WriteLine(e.ToString());
throw;
}
}
