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;
}
}
