131 lines
3.7 KiB
Go
131 lines
3.7 KiB
Go
package collector
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import (
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"context"
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"fmt"
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"strconv"
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"time"
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"github.com/aws/aws-sdk-go-v2/aws"
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"github.com/aws/aws-sdk-go-v2/service/sqs"
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"github.com/aws/aws-sdk-go-v2/service/sqs/types"
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autoscalingv2 "k8s.io/api/autoscaling/v2"
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"k8s.io/apimachinery/pkg/api/resource"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/metrics/pkg/apis/external_metrics"
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)
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const (
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AWSSQSQueueLengthMetric = "sqs-queue-length"
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sqsQueueNameLabelKey = "queue-name"
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sqsQueueRegionLabelKey = "region"
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)
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type AWSCollectorPlugin struct {
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configs map[string]aws.Config
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}
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func NewAWSCollectorPlugin(configs map[string]aws.Config) *AWSCollectorPlugin {
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return &AWSCollectorPlugin{
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configs: configs,
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}
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}
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// NewCollector initializes a new skipper collector from the specified HPA.
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func (c *AWSCollectorPlugin) NewCollector(ctx context.Context, hpa *autoscalingv2.HorizontalPodAutoscaler, config *MetricConfig, interval time.Duration) (Collector, error) {
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return NewAWSSQSCollector(ctx, c.configs, hpa, config, interval)
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}
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type sqsiface interface {
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GetQueueAttributes(ctx context.Context, params *sqs.GetQueueAttributesInput, optFns ...func(*sqs.Options)) (*sqs.GetQueueAttributesOutput, error)
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}
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type AWSSQSCollector struct {
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sqs sqsiface
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interval time.Duration
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queueURL string
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queueName string
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namespace string
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metric autoscalingv2.MetricIdentifier
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metricType autoscalingv2.MetricSourceType
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}
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func NewAWSSQSCollector(ctx context.Context, configs map[string]aws.Config, hpa *autoscalingv2.HorizontalPodAutoscaler, config *MetricConfig, interval time.Duration) (*AWSSQSCollector, error) {
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if config.Metric.Selector == nil {
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return nil, fmt.Errorf("selector for queue is not specified")
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}
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name, ok := config.Config[sqsQueueNameLabelKey]
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if !ok {
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return nil, fmt.Errorf("sqs queue name not specified on metric")
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}
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region, ok := config.Config[sqsQueueRegionLabelKey]
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if !ok {
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return nil, fmt.Errorf("sqs queue region is not specified on metric")
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}
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cfg, ok := configs[region]
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if !ok {
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return nil, fmt.Errorf("the metric region: %s is not configured", region)
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}
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service := sqs.NewFromConfig(cfg)
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params := &sqs.GetQueueUrlInput{
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QueueName: aws.String(name),
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}
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resp, err := service.GetQueueUrl(context.TODO(), params)
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if err != nil {
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return nil, fmt.Errorf("failed to get queue URL for queue '%s': %v", name, err)
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}
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return &AWSSQSCollector{
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sqs: service,
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interval: interval,
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queueURL: aws.ToString(resp.QueueUrl),
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queueName: name,
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namespace: hpa.Namespace,
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metric: config.Metric,
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metricType: config.Type,
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}, nil
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}
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func (c *AWSSQSCollector) GetMetrics(ctx context.Context) ([]CollectedMetric, error) {
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params := &sqs.GetQueueAttributesInput{
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QueueUrl: aws.String(c.queueURL),
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AttributeNames: []types.QueueAttributeName{types.QueueAttributeNameApproximateNumberOfMessages},
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}
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resp, err := c.sqs.GetQueueAttributes(ctx, params)
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if err != nil {
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return nil, err
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}
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if v, ok := resp.Attributes[string(types.QueueAttributeNameApproximateNumberOfMessages)]; ok {
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i, err := strconv.Atoi(v)
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if err != nil {
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return nil, err
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}
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metricValue := CollectedMetric{
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Namespace: c.namespace,
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Type: c.metricType,
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External: external_metrics.ExternalMetricValue{
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MetricName: c.metric.Name,
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MetricLabels: c.metric.Selector.MatchLabels,
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Timestamp: metav1.Time{Time: time.Now().UTC()},
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Value: *resource.NewQuantity(int64(i), resource.DecimalSI),
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},
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}
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return []CollectedMetric{metricValue}, nil
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}
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return nil, fmt.Errorf("failed to get queue length for '%s'", c.queueName)
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}
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// Interval returns the interval at which the collector should run.
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func (c *AWSSQSCollector) Interval() time.Duration {
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return c.interval
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}
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