/
ecs.go
219 lines (181 loc) · 6.12 KB
/
ecs.go
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package inventory
import (
"fmt"
"strings"
"time"
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/aws/session"
"github.com/aws/aws-sdk-go/service/ecs"
"github.com/aws/aws-sdk-go/service/ecs/ecsiface"
"github.com/anchore/ecs-inventory/internal/logger"
"github.com/anchore/ecs-inventory/internal/tracker"
"github.com/anchore/ecs-inventory/pkg/reporter"
)
// Check if AWS are present, should be stored in ~/.aws/credentials
func checkAWSCredentials(sess *session.Session) error {
_, err := sess.Config.Credentials.Get()
if err != nil {
fmt.Println(
"Unable to get AWS credentials, please check ~/.aws/credentials file or environment variables are set correctly.",
)
return fmt.Errorf("unable to get AWS credentials: %w", err)
}
return nil
}
func fetchClusters(client ecsiface.ECSAPI) ([]*string, error) {
defer tracker.TrackFunctionTime(time.Now(), "Fetching list of clusters")
input := &ecs.ListClustersInput{}
result, err := client.ListClusters(input)
if err != nil {
return nil, err
}
return result.ClusterArns, nil
}
func fetchTasksFromCluster(client ecsiface.ECSAPI, cluster string) ([]*string, error) {
defer tracker.TrackFunctionTime(time.Now(), fmt.Sprintf("Fetching tasks from cluster: %s", cluster))
input := &ecs.ListTasksInput{
Cluster: aws.String(cluster),
}
result, err := client.ListTasks(input)
if err != nil {
return nil, err
}
return result.TaskArns, nil
}
func fetchServicesFromCluster(client ecsiface.ECSAPI, cluster string) ([]*string, error) {
defer tracker.TrackFunctionTime(time.Now(), fmt.Sprintf("Fetching services from cluster: %s", cluster))
input := &ecs.ListServicesInput{
Cluster: aws.String(cluster),
}
result, err := client.ListServices(input)
if err != nil {
return nil, err
}
return result.ServiceArns, nil
}
func fetchContainersFromTasks(client ecsiface.ECSAPI, cluster string, tasks []*string) ([]reporter.Container, error) {
defer tracker.TrackFunctionTime(time.Now(), fmt.Sprintf("Fetching Containers from tasks for cluster: %s", cluster))
input := &ecs.DescribeTasksInput{
Cluster: aws.String(cluster),
Tasks: tasks,
}
results, err := client.DescribeTasks(input)
if err != nil {
return nil, err
}
containers := []reporter.Container{}
for _, task := range results.Tasks {
for _, container := range task.Containers {
digest := ""
if container.ImageDigest != nil {
digest = *container.ImageDigest
} else {
logger.Log.Warnf("No image digest found for container: %s", *container.ContainerArn)
logger.Log.Warn("Ensure all ECS container hosts are running at least ECS Agent 1.70.0, which fixed a bug where image digests were not returned in the DescribeTasks API response.")
}
containers = append(containers, reporter.Container{
ARN: *container.ContainerArn,
ImageTag: *container.Image,
ImageDigest: digest,
TaskARN: *task.TaskArn,
})
}
}
return containers, nil
}
// Using the clusterARN and service name, construct the service ARN.
// The DescribeTasks API does not return the service ARN only the service name.
func constructServiceARN(clusterARN string, serviceName string) (string, error) {
arnParts := strings.Split(clusterARN, ":")
if len(arnParts) != 6 {
return "", fmt.Errorf("unable to parse cluster ARN: %s", clusterARN)
}
region := arnParts[3]
accountID := arnParts[4]
clusterParts := strings.Split(arnParts[5], "/")
if len(clusterParts) < 2 {
return "", fmt.Errorf("unable to parse cluster ARN: %s", clusterARN)
}
clusterName := clusterParts[1]
if region == "" || clusterName == "" || accountID == "" {
return "", fmt.Errorf("unable to parse cluster ARN: %s", clusterARN)
}
return fmt.Sprintf("arn:aws:ecs:%s:%s:service/%s/%s", region, accountID, clusterName, serviceName), nil
}
func fetchTasksMetadata(client ecsiface.ECSAPI, cluster string, tasks []*string) ([]reporter.Task, error) {
input := &ecs.DescribeTasksInput{
Cluster: aws.String(cluster),
Tasks: tasks,
}
results, err := client.DescribeTasks(input)
if err != nil {
return nil, err
}
var tasksMetadata []reporter.Task
for _, task := range results.Tasks {
// Tags may not be present in the task response so we need to fetch them explicitly
tagMap, err := fetchTagsForResource(client, *task.TaskArn)
if err != nil {
return nil, err
}
tMetadata := reporter.Task{
ARN: *task.TaskArn,
TaskDefARN: *task.TaskDefinitionArn,
Tags: tagMap,
}
// Group will be "servive:serviceName" if the task is part of a service, otherwise it will be
// "family:taskDefinitionFamily" if the task is not part of a service.
groupParts := strings.Split(*task.Group, ":")
if len(groupParts) != 2 {
return nil, fmt.Errorf("unable to parse task group: %s", *task.Group)
}
groupType := groupParts[0]
if groupType == "service" {
serviceName := groupParts[1]
serviceArn, err := constructServiceARN(*task.ClusterArn, serviceName)
if err != nil {
return nil, err
}
tMetadata.ServiceARN = serviceArn
}
tasksMetadata = append(tasksMetadata, tMetadata)
}
return tasksMetadata, nil
}
func fetchServicesMetadata(client ecsiface.ECSAPI, cluster string, services []*string) ([]reporter.Service, error) {
input := &ecs.DescribeServicesInput{
Cluster: aws.String(cluster),
Services: services,
}
results, err := client.DescribeServices(input)
if err != nil {
return nil, err
}
var servicesMetadata []reporter.Service
for _, service := range results.Services {
// Tags may not be present in the service response so we need to fetch them explicitly
tagMap, err := fetchTagsForResource(client, *service.ServiceArn)
if err != nil {
return nil, err
}
servicesMetadata = append(servicesMetadata, reporter.Service{
ARN: *service.ServiceArn,
Tags: tagMap,
})
}
return servicesMetadata, nil
}
func fetchTagsForResource(client ecsiface.ECSAPI, resourceARN string) (map[string]string, error) {
input := &ecs.ListTagsForResourceInput{
ResourceArn: aws.String(resourceARN),
}
result, err := client.ListTagsForResource(input)
if err != nil {
return nil, err
}
tags := make(map[string]string)
for _, tag := range result.Tags {
tags[*tag.Key] = *tag.Value
}
return tags, nil
}