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Abstract

For automatically chaos engineering, ShardingSphere Operator supports a CRD named Chaos and build corresponding chaos platform CRD manifest with the attributions contained by the Chaos CRD. It supports Chaos Mesh currently, and is going to support LitmusChaos in future releases.

Installation of Operator

Please refer to ShardingSphere Operator user manual’s Operator Installation chapter.

CRD Introduction

Chaos

Operator Configuration

It need to be activated by enabling the responding FeatureGate:

helm install [RELEASE_NAME] shardingsphere/apache-shardingsphere-operator-charts --set operator.featureGates.chaos=true

Parameters

Required Paramaters
Name Description Type Example
metadata.name Name string foo
metadata.namespace Namespace，default ‘default ' string
Optional Parameters
Name Description Type Example
spec.podChaos.selector.namespaces Pod Selector: Namespace []string
spec.podChaos.selector.labelSelectors Pod Selector：Labels map[string]string
spec.podChaos.selector.annotationSelectors Pod Selector：Annotations map[string]string
spec.podChaos.selector.nodes Pod Selector：Node []string
spec.podChaos.selector.pods Pod Selector：Pod map[string][]string
spec.podChaos.selector.nodeSelectors Pod Selector：NodeSelector map[string]string
spec.podChaos.selector.expressionSelectors Pod Selector：ExpressionSelector []metav1.LabelSelectorRequirement
spec.podChaos.action PodChaos Type，including PodFailure、ContainerKill、PodKill、CPUStress、MemoryStress PodChaosAction PodFailure
spec.podChaos.params.podFailure.duration PodFailure Duration string 1m
spec.podChaos.params.containerKill.containerNames ContainerKill target container names []string shardingsphere-proxy
spec.podChaos.params.podKill.gracePeriod PodKill graceful period time number 0
spec.podChaos.params.cpuStress.duration CPU duration string 1m
spec.podChaos.params.cpuStress.cores CPU cores number 2
spec.podChaos.params.cpuStress.load CPU load number 50
spec.podChaos.params.memoryStress.duration Memory duration string 1m
spec.podChaos.params.memoryStress.workers Memory workers numbers 2
spec.podChaos.params.memoryStress.consumption Memory consumption string 50
spec.networkChaos.source.namespaces Pod Selector：namespace []string
spec.networkChaos.soruce.labelSelectors Pod Selector: labels map[string]string
spec.networkChaos.source.annotationSelectors Pod Selector: annotations map[string]string
spec.networkChaos.source.nodes Pod Selector: node []string
spec.networkChaos.source.pods Pod Selector：Pod map[string][]string
spec.networkChaos.source.nodeSelectors Pod Selector：NodeSlector map[string]string
spec.networkChaos.source.expressionSelectors Pod Selector：ExpressionSelector []metav1.LabelSelectorRequirement
spec.networkChaos.target.namespaces Pod Selector：Namespace []string
spec.networkChaos.target.labelSelectors Pod Selector：Labels map[string]string
spec.networkChaos.target.annotationSelectors Pod Selector：Annotations map[string]string
spec.networkChaos.target.nodes Pod Selector：Node []string
spec.networkChaos.target.pods Pod Selector：Pod map[string][]string
spec.networkChaos.target.nodeSelectors Pod Selector：NodeSelector map[string]string
spec.networkChaos.target.expressionSelectors Pod Selector：ExpressionSelector []metav1.LabelSelectorRequirement
spec.networkChaos.action. NetworkChaos type，including Delay，Loss，Duplication，Corruption，Partition，Bandwidth string 50
spec.networkChaos.duration. Duration string 1m
spec.networkChaos.direction. Traffic direction，including to、from 和 both string both
spec.networkChaos.params.deplay.latency Packet delay string 100
spec.networkChaos.params.loss.loss Packet loss string 80
spec.networkChaos.params.duplicate.duplicate Packet duplication string 80
spec.networkChaos.params.corrupt.corrupt Packet Corrupt string 80
Annotations Introduction

While using PodChaos and NetworkChaos, some parameters need to be setup with annotations according to the difference of chaos platform, such as:

  • Select target ComputeNode: selector.chaos-mesh.org/mode: one
  • Select target traffic: target-selector.chaos-mesh.org/mode: all

Example

Here is a example of PodChaos which injects CPU Stress:

apiVersion: shardingsphere.apache.org/v1alpha1
kind: Chaos
metadata:
  name: cpu-chaos
  annotations:
    selector.chaos-mesh.org/mode: one
spec:
  podChaos:
    selector:
      labelSelectors:
        app: foo
      namespaces: 
      - "default"
    params:
      cpuStress:
        duration: 1m
        cores: 2
        load: 50
    action: "CPUStress"