Golang ECS.DescribeServices方法代码示例

// findTaskArn
// finds the first task definition in a cluster and service.
//
// Returns task ARN
//
// TODO:
//   filter the resulting tasks by essential: true
//   and only return the essential?
//   either that or assume that the new image will
//   somewhat match the old image, and use that to pick
//   one of the tasks.
func findTaskArn(svc *ecs.ECS, clusterArn string, serviceArn string) (string, error) {
	params := &ecs.DescribeServicesInput{
		Services: []*string{
			aws.String(serviceArn),
		},
		Cluster: aws.String(clusterArn),
	}
	resp, err := svc.DescribeServices(params)
	return *resp.Services[0].TaskDefinition, err
}

// Verify that the ECS service exists.
func VerifyServiceExists(ecs_obj *ecs.ECS, cluster string, service string) error {
	params := &ecs.DescribeServicesInput{
		Cluster: &cluster,
		Services: []*string{ // Required
			aws.String(service), // Required
		},
	}
	_, err := ecs_obj.DescribeServices(params)

	if err != nil {
		return fmt.Errorf("Cannot verify if ECS service exists: %s", FormatAwsError(err))
	}
	return nil
}

// GetServices will return a slice of ECS Services for a given cluster
func GetServices(svc *ecs.ECS, cluster *string) ([]*ecs.Service, error) {

	var serviceArns []*string

	// List clusters
	reqParams := &ecs.ListServicesInput{
		Cluster:    cluster,
		MaxResults: aws.Int64(10),
		NextToken:  aws.String(""),
	}

	// Loop through tokens until no more results remain
	for {
		resp, err := svc.ListServices(reqParams)

		// Error check
		if err != nil {
			return nil, fmt.Errorf("ecs.ListServices: %s", err.Error())
		}

		// Expand slice of services and append to our comprehensive list
		serviceArns = append(serviceArns, resp.ServiceArns...)

		// Cycle token
		if resp.NextToken != nil {
			reqParams.NextToken = resp.NextToken
		} else {
			// Kill loop ... out of response pages
			break
		}

	}

	// Describe the services that we just got back
	resp, err := svc.DescribeServices(&ecs.DescribeServicesInput{
		Cluster:  cluster,
		Services: serviceArns,
	})
	if err != nil {
		return nil, fmt.Errorf("ecs.DescribeServices: %s", err.Error())
	}

	return resp.Services, nil
}