Loading...

XML

Word

Printable

Type: Bug
Resolution: Done-Errata
Priority: Normal
Fix Version/s: None
Affects Version/s: 4.14.z
Component/s: Pod Autoscaler
Labels:
None

Severity:
Moderate
Regression:
No
Story Points:
3
Sprint:
PODAUTO - Sprint 251
sprint_count:
1
Blocked:
False
Blocked Reason:

Hide

None

Show
None
Release Note Text:

Hide
Previously if invalid values (e.g. nonexistent namespaces) were specified in scaledObject metadata, the underling scaler clients would not free/close their client descriptors, resulting in a slow memory leak. This release properly closes the underlying client descriptors when there are errors, preventing memory from leaking.

Show
Previously if invalid values (e.g. nonexistent namespaces) were specified in scaledObject metadata, the underling scaler clients would not free/close their client descriptors, resulting in a slow memory leak. This release properly closes the underlying client descriptors when there are errors, preventing memory from leaking.
Release Note Type:
Bug Fix
Release Note Status:
In Progress
Target Version:

4.16.0
Target Backport Versions:

4.16.0

SFDC Cases Counter:
SFDC Cases Open:
SFDC Cases Links:

PX Impact Score:
PX Priority Data:

Description of problem:

    keda operator pod increasing memory indefinitely till OOM when invalid namespace is defined in scaled object.

Version-Release number of selected component (if applicable):

    2.11.2-322

How reproducible:

    always

Steps to Reproduce:

    1. define a scaledObject of type prometheus with an invalid namespace in triggers.metadata, like for instance:

    triggers:
    - authenticationRef:
        name: keda-trigger-auth-prometheus
      metadata:
        authModes: bearer
        metricName: http_requests_total
        namespace: ns2                      ===> this namespace does not exist          
        query: sum(rate(http_requests_total{job="prometheus-example-app"}[1m]))
        serverAddress: https://thanos-querier.openshift-monitoring.svc.cluster.local:9092
        threshold: "3"
      type: prometheus

    2. check keda operator logs for stracktrace of this sort

      oc logs keda-operator-59865dbdc4-dksnk
...
024-03-01T19:47:46Z    ERROR    scale_handler    error getting metric for scaler    {"scaledObject.Namespace": "ns1", "scaledObject.Name": "prom-scaledobject", "scaler": "prometheusScaler", "error": "prometheus query api returned error. status: 403 response: Forbidden (user=system:serviceaccount:ns1:thanos, verb=get, resource=pods, subresource=)\n"}
github.com/kedacore/keda/v2/pkg/scaling.(*scaleHandler).GetScaledObjectMetrics
    /remote-source/keda/app/pkg/scaling/scale_handler.go:483
github.com/kedacore/keda/v2/pkg/metricsservice.(*GrpcServer).GetMetrics
    /remote-source/keda/app/pkg/metricsservice/server.go:47
github.com/kedacore/keda/v2/pkg/metricsservice/api._MetricsService_GetMetrics_Handler
    /remote-source/keda/app/pkg/metricsservice/api/metrics_grpc.pb.go:99
google.golang.org/grpc.(*Server).processUnaryRPC
    /remote-source/keda/app/vendor/google.golang.org/grpc/server.go:1337
google.golang.org/grpc.(*Server).handleStream
    /remote-source/keda/app/vendor/google.golang.org/grpc/server.go:1714
google.golang.org/grpc.(*Server).serveStreams.func1.1
    /remote-source/keda/app/vendor/google.golang.org/grpc/server.go:959
2024-03-01T19:47:58Z    ERROR    prometheus_scaler    prometheus query api returned error    {"type": "ScaledObject", "namespace": "ns1", "name": "prom-scaledobject", "error": "prometheus query api returned error. status: 403 response: Forbidden (user=system:serviceaccount:ns1:thanos, verb=get, resource=pods, subresource=)\n"}
github.com/kedacore/keda/v2/pkg/scalers.(*prometheusScaler).ExecutePromQuery
    /remote-source/keda/app/pkg/scalers/prometheus_scaler.go:310
github.com/kedacore/keda/v2/pkg/scalers.(*prometheusScaler).GetMetricsAndActivity
    /remote-source/keda/app/pkg/scalers/prometheus_scaler.go:365
github.com/kedacore/keda/v2/pkg/scaling/cache.(*ScalersCache).GetMetricsAndActivityForScaler
    /remote-source/keda/app/pkg/scaling/cache/scalers_cache.go:130
github.com/kedacore/keda/v2/pkg/scaling.(*scaleHandler).getScaledObjectState
    /remote-source/keda/app/pkg/scaling/scale_handler.go:572
github.com/kedacore/keda/v2/pkg/scaling.(*scaleHandler).checkScalers
    /remote-source/keda/app/pkg/scaling/scale_handler.go:236
github.com/kedacore/keda/v2/pkg/scaling.(*scaleHandler).startScaleLoop
    /remote-source/keda/app/pkg/scaling/scale_handler.go:175
2024-03-01T19:47:58Z    ERROR    prometheus_scaler    error executing prometheus query    {"type": "ScaledObject", "namespace": "ns1", "name": "prom-scaledobject", "error": "prometheus query api returned error. status: 403 response: Forbidden (user=system:serviceaccount:ns1:thanos, verb=get, resource=pods, subresource=)\n"}
github.com/kedacore/keda/v2/pkg/scalers.(*prometheusScaler).GetMetricsAndActivity
    /remote-source/keda/app/pkg/scalers/prometheus_scaler.go:367
github.com/kedacore/keda/v2/pkg/scaling/cache.(*ScalersCache).GetMetricsAndActivityForScaler
    /remote-source/keda/app/pkg/scaling/cache/scalers_cache.go:130
github.com/kedacore/keda/v2/pkg/scaling.(*scaleHandler).getScaledObjectState
    /remote-source/keda/app/pkg/scaling/scale_handler.go:572
github.com/kedacore/keda/v2/pkg/scaling.(*scaleHandler).checkScalers
    /remote-source/keda/app/pkg/scaling/scale_handler.go:236
github.com/kedacore/keda/v2/pkg/scaling.(*scaleHandler).startScaleLoop
    /remote-source/keda/app/pkg/scaling/scale_handler.go:175
2024-03-01T19:47:58Z    ERROR    prometheus_scaler    prometheus query api returned error    {"type": "ScaledObject", "namespace": "ns1", "name": "prom-scaledobject", "error": "prometheus query api returned error. status: 403 response: Forbidden (user=system:serviceaccount:ns1:thanos, verb=get, resource=pods, subresource=)\n"}
github.com/kedacore/keda/v2/pkg/scalers.(*prometheusScaler).ExecutePromQuery
    /remote-source/keda/app/pkg/scalers/prometheus_scaler.go:310
github.com/kedacore/keda/v2/pkg/scalers.(*prometheusScaler).GetMetricsAndActivity
    /remote-source/keda/app/pkg/scalers/prometheus_scaler.go:365
github.com/kedacore/keda/v2/pkg/scaling/cache.(*ScalersCache).GetMetricsAndActivityForScaler
    /remote-source/keda/app/pkg/scaling/cache/scalers_cache.go:140
github.com/kedacore/keda/v2/pkg/scaling.(*scaleHandler).getScaledObjectState
    /remote-source/keda/app/pkg/scaling/scale_handler.go:572
github.com/kedacore/keda/v2/pkg/scaling.(*scaleHandler).checkScalers
    /remote-source/keda/app/pkg/scaling/scale_handler.go:236
github.com/kedacore/keda/v2/pkg/scaling.(*scaleHandler).startScaleLoop
    /remote-source/keda/app/pkg/scaling/scale_handler.go:175
2024-03-01T19:47:58Z    ERROR    prometheus_scaler    error executing prometheus query    {"type": "ScaledObject", "namespace": "ns1", "name": "prom-scaledobject", "error": "prometheus query api returned error. status: 403 response: Forbidden (user=system:serviceaccount:ns1:thanos, verb=get, resource=pods, subresource=)\n"}
github.com/kedacore/keda/v2/pkg/scalers.(*prometheusScaler).GetMetricsAndActivity
    /remote-source/keda/app/pkg/scalers/prometheus_scaler.go:367
github.com/kedacore/keda/v2/pkg/scaling/cache.(*ScalersCache).GetMetricsAndActivityForScaler
    /remote-source/keda/app/pkg/scaling/cache/scalers_cache.go:140
github.com/kedacore/keda/v2/pkg/scaling.(*scaleHandler).getScaledObjectState
    /remote-source/keda/app/pkg/scaling/scale_handler.go:572
github.com/kedacore/keda/v2/pkg/scaling.(*scaleHandler).checkScalers
    /remote-source/keda/app/pkg/scaling/scale_handler.go:236
github.com/kedacore/keda/v2/pkg/scaling.(*scaleHandler).startScaleLoop
    /remote-source/keda/app/pkg/scaling/scale_handler.go:175
2024-03-01T19:47:58Z    ERROR    scale_handler    error getting scale decision    {"scaledObject.Namespace": "ns1", "scaledObject.Name": "prom-scaledobject", "scaler": "prometheusScaler", "error": "prometheus query api returned error. status: 403 response: Forbidden (user=system:serviceaccount:ns1:thanos, verb=get, resource=pods, subresource=)\n"}
github.com/kedacore/keda/v2/pkg/scaling.(*scaleHandler).getScaledObjectState
    /remote-source/keda/app/pkg/scaling/scale_handler.go:588
github.com/kedacore/keda/v2/pkg/scaling.(*scaleHandler).checkScalers
    /remote-source/keda/app/pkg/scaling/scale_handler.go:236
github.com/kedacore/keda/v2/pkg/scaling.(*scaleHandler).startScaleLoop
    /remote-source/keda/app/pkg/scaling/scale_handler.go:175
.....


    3. check in observe/metrics in openshift-keda namespace this query:

sum(container_memory_working_set_bytes{job="kubelet", metrics_path="/metrics/cadvisor", cluster="", namespace="openshift-keda", container!="", image!=""}) by (pod)

Actual results:

    very quickly the pod keda-operator is increasing memory usage. 
    I have seen it increased from ~70Mb to 100Mb in 30m

Expected results:

Additional info:

links to

openshift/kedacore-keda#26: OCPBUGS-30145: fix: Prevented memory leak generated by not correctly cleaned HTTP resources (#5293)

RHSA-2024:129656 Custom Metrics Autoscaler Operator for Red Hat OpenShift security/bugfix update

mentioned on

Merge request - Updated US source to: dc4c94b Merge pull request #26 from jkyros/http-fix-memory-leak

Assignee:: John Kyros

Reporter:: German Parente

QA Contact:: Sunil Choudhary

Votes:: 0 Vote for this issue

Watchers:: 8 Start watching this issue

Created:: 2024/03/01 7:53 PM

Updated:: 2024/04/15 5:44 AM

Resolved:: 2024/04/15 5:44 AM

Details

Description

Attachments

Issue Links

Easy Agile Planning Poker

Activity

People

Dates