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huawei_cloudeye_scaler.go
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huawei_cloudeye_scaler.go
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package scalers
import (
"context"
"fmt"
"strconv"
"time"
"github.com/Huawei/gophercloud"
"github.com/Huawei/gophercloud/auth/aksk"
"github.com/Huawei/gophercloud/openstack"
"github.com/Huawei/gophercloud/openstack/ces/v1/metricdata"
"github.com/go-logr/logr"
v2 "k8s.io/api/autoscaling/v2"
"k8s.io/metrics/pkg/apis/external_metrics"
"github.com/kedacore/keda/v2/pkg/scalers/scalersconfig"
kedautil "github.com/kedacore/keda/v2/pkg/util"
)
const (
defaultCloudeyeMetricCollectionTime = 300
defaultCloudeyeMetricFilter = "average"
defaultCloudeyeMetricPeriod = "300"
defaultHuaweiCloud = "myhuaweicloud.com"
)
type huaweiCloudeyeScaler struct {
metricType v2.MetricTargetType
metadata *huaweiCloudeyeMetadata
logger logr.Logger
}
type huaweiCloudeyeMetadata struct {
namespace string
metricsName string
dimensionName string
dimensionValue string
targetMetricValue float64
activationTargetMetricValue float64
metricCollectionTime int64
metricFilter string
metricPeriod string
huaweiAuthorization huaweiAuthorizationMetadata
triggerIndex int
}
type huaweiAuthorizationMetadata struct {
IdentityEndpoint string
// user project id
ProjectID string
DomainID string
// region
Region string
// Cloud name
Domain string
// Cloud name
Cloud string
AccessKey string // Access Key
SecretKey string // Secret key
}
// NewHuaweiCloudeyeScaler creates a new huaweiCloudeyeScaler
func NewHuaweiCloudeyeScaler(config *scalersconfig.ScalerConfig) (Scaler, error) {
metricType, err := GetMetricTargetType(config)
if err != nil {
return nil, fmt.Errorf("error getting scaler metric type: %w", err)
}
logger := InitializeLogger(config, "huawei_cloudeye_scaler")
meta, err := parseHuaweiCloudeyeMetadata(config, logger)
if err != nil {
return nil, fmt.Errorf("error parsing Cloudeye metadata: %w", err)
}
return &huaweiCloudeyeScaler{
metricType: metricType,
metadata: meta,
logger: logger,
}, nil
}
func parseHuaweiCloudeyeMetadata(config *scalersconfig.ScalerConfig, logger logr.Logger) (*huaweiCloudeyeMetadata, error) {
meta := huaweiCloudeyeMetadata{}
meta.metricCollectionTime = defaultCloudeyeMetricCollectionTime
meta.metricFilter = defaultCloudeyeMetricFilter
meta.metricPeriod = defaultCloudeyeMetricPeriod
if val, ok := config.TriggerMetadata["namespace"]; ok && val != "" {
meta.namespace = val
} else {
return nil, fmt.Errorf("namespace not given")
}
if val, ok := config.TriggerMetadata["metricName"]; ok && val != "" {
meta.metricsName = val
} else {
return nil, fmt.Errorf("metric Name not given")
}
if val, ok := config.TriggerMetadata["dimensionName"]; ok && val != "" {
meta.dimensionName = val
} else {
return nil, fmt.Errorf("dimension Name not given")
}
if val, ok := config.TriggerMetadata["dimensionValue"]; ok && val != "" {
meta.dimensionValue = val
} else {
return nil, fmt.Errorf("dimension Value not given")
}
if val, ok := config.TriggerMetadata["targetMetricValue"]; ok && val != "" {
targetMetricValue, err := strconv.ParseFloat(val, 64)
if err != nil {
logger.Error(err, "Error parsing targetMetricValue metadata")
} else {
meta.targetMetricValue = targetMetricValue
}
} else {
return nil, fmt.Errorf("target Metric Value not given")
}
meta.activationTargetMetricValue = 0
if val, ok := config.TriggerMetadata["activationTargetMetricValue"]; ok && val != "" {
activationTargetMetricValue, err := strconv.ParseFloat(val, 64)
if err != nil {
logger.Error(err, "Error parsing activationTargetMetricValue metadata")
}
meta.activationTargetMetricValue = activationTargetMetricValue
}
if val, ok := config.TriggerMetadata["minMetricValue"]; ok && val != "" {
minMetricValue, err := strconv.ParseFloat(val, 64)
if err != nil {
logger.Error(err, "Error parsing minMetricValue metadata")
} else {
logger.Error(err, "minMetricValue is deprecated and will be removed in next versions, please use activationTargetMetricValue instead")
meta.activationTargetMetricValue = minMetricValue
}
} else {
return nil, fmt.Errorf("min Metric Value not given")
}
if val, ok := config.TriggerMetadata["metricCollectionTime"]; ok && val != "" {
metricCollectionTime, err := strconv.Atoi(val)
if err != nil {
logger.Error(err, "Error parsing metricCollectionTime metadata")
} else {
meta.metricCollectionTime = int64(metricCollectionTime)
}
}
if val, ok := config.TriggerMetadata["metricFilter"]; ok && val != "" {
meta.metricFilter = val
}
if val, ok := config.TriggerMetadata["metricPeriod"]; ok && val != "" {
_, err := strconv.Atoi(val)
if err != nil {
logger.Error(err, "Error parsing metricPeriod metadata")
} else {
meta.metricPeriod = val
}
}
auth, err := gethuaweiAuthorization(config.AuthParams)
if err != nil {
return nil, err
}
meta.huaweiAuthorization = auth
meta.triggerIndex = config.TriggerIndex
return &meta, nil
}
func gethuaweiAuthorization(authParams map[string]string) (huaweiAuthorizationMetadata, error) {
meta := huaweiAuthorizationMetadata{}
if authParams["IdentityEndpoint"] != "" {
meta.IdentityEndpoint = authParams["IdentityEndpoint"]
} else {
return meta, fmt.Errorf("identityEndpoint doesn't exist in the authParams")
}
if authParams["ProjectID"] != "" {
meta.ProjectID = authParams["ProjectID"]
} else {
return meta, fmt.Errorf("projectID doesn't exist in the authParams")
}
if authParams["DomainID"] != "" {
meta.DomainID = authParams["DomainID"]
} else {
return meta, fmt.Errorf("domainID doesn't exist in the authParams")
}
if authParams["Region"] != "" {
meta.Region = authParams["Region"]
} else {
return meta, fmt.Errorf("region doesn't exist in the authParams")
}
if authParams["Domain"] != "" {
meta.Domain = authParams["Domain"]
} else {
return meta, fmt.Errorf("domain doesn't exist in the authParams")
}
if authParams["Cloud"] != "" {
meta.Cloud = authParams["Cloud"]
} else {
meta.Cloud = defaultHuaweiCloud
}
if authParams["AccessKey"] != "" {
meta.AccessKey = authParams["AccessKey"]
} else {
return meta, fmt.Errorf("accessKey doesn't exist in the authParams")
}
if authParams["SecretKey"] != "" {
meta.SecretKey = authParams["SecretKey"]
} else {
return meta, fmt.Errorf("secretKey doesn't exist in the authParams")
}
return meta, nil
}
func (s *huaweiCloudeyeScaler) GetMetricsAndActivity(_ context.Context, metricName string) ([]external_metrics.ExternalMetricValue, bool, error) {
metricValue, err := s.GetCloudeyeMetrics()
if err != nil {
s.logger.Error(err, "Error getting metric value")
return []external_metrics.ExternalMetricValue{}, false, err
}
metric := GenerateMetricInMili(metricName, metricValue)
return []external_metrics.ExternalMetricValue{metric}, metricValue > s.metadata.activationTargetMetricValue, nil
}
func (s *huaweiCloudeyeScaler) GetMetricSpecForScaling(context.Context) []v2.MetricSpec {
externalMetric := &v2.ExternalMetricSource{
Metric: v2.MetricIdentifier{
Name: GenerateMetricNameWithIndex(s.metadata.triggerIndex, kedautil.NormalizeString(fmt.Sprintf("huawei-cloudeye-%s", s.metadata.metricsName))),
},
Target: GetMetricTargetMili(s.metricType, s.metadata.targetMetricValue),
}
metricSpec := v2.MetricSpec{External: externalMetric, Type: externalMetricType}
return []v2.MetricSpec{metricSpec}
}
func (s *huaweiCloudeyeScaler) Close(context.Context) error {
return nil
}
func (s *huaweiCloudeyeScaler) GetCloudeyeMetrics() (float64, error) {
options := aksk.AKSKOptions{
IdentityEndpoint: s.metadata.huaweiAuthorization.IdentityEndpoint,
ProjectID: s.metadata.huaweiAuthorization.ProjectID,
AccessKey: s.metadata.huaweiAuthorization.AccessKey,
SecretKey: s.metadata.huaweiAuthorization.SecretKey,
Region: s.metadata.huaweiAuthorization.Region,
Domain: s.metadata.huaweiAuthorization.Domain,
DomainID: s.metadata.huaweiAuthorization.DomainID,
Cloud: s.metadata.huaweiAuthorization.Cloud,
}
provider, err := openstack.AuthenticatedClient(options)
if err != nil {
s.logger.Error(err, "Failed to get the provider")
return -1, err
}
sc, err := openstack.NewCESV1(provider, gophercloud.EndpointOpts{})
if err != nil {
s.logger.Error(err, "get ces client failed")
if ue, ok := err.(*gophercloud.UnifiedError); ok {
s.logger.Info("ErrCode:", ue.ErrorCode())
s.logger.Info("Message:", ue.Message())
}
return -1, err
}
opts := metricdata.BatchQueryOpts{
Metrics: []metricdata.Metric{
{
Namespace: s.metadata.namespace,
Dimensions: []map[string]string{
{
"name": s.metadata.dimensionName,
"value": s.metadata.dimensionValue,
},
},
MetricName: s.metadata.metricsName,
},
},
From: time.Now().Truncate(time.Minute).Add(time.Second*-1*time.Duration(s.metadata.metricCollectionTime)).UnixNano() / 1e6,
To: time.Now().Truncate(time.Minute).UnixNano() / 1e6,
Period: s.metadata.metricPeriod,
Filter: s.metadata.metricFilter,
}
metricdatas, err := metricdata.BatchQuery(sc, opts).ExtractMetricDatas()
if err != nil {
s.logger.Error(err, "query metrics failed")
if ue, ok := err.(*gophercloud.UnifiedError); ok {
s.logger.Info("ErrCode:", ue.ErrorCode())
s.logger.Info("Message:", ue.Message())
}
return -1, err
}
s.logger.V(1).Info("Received Metric Data", "data", metricdatas)
var metricValue float64
if metricdatas[0].Datapoints != nil && len(metricdatas[0].Datapoints) > 0 {
v, ok := metricdatas[0].Datapoints[0][s.metadata.metricFilter].(float64)
if ok {
metricValue = v
} else {
return -1, fmt.Errorf("metric Data not float64")
}
} else {
return -1, fmt.Errorf("metric Data not received")
}
return metricValue, nil
}