Kuma Star

Careful!

You are browsing documentation for a version of Kuma that is not the latest release.

MeshFaultInjection

With the MeshFaultInjection policy you can easily test your microservices against resiliency.

This policy uses a new policy matching algorithm. Do not combine with FaultInjection.

targetRef support matrix

targetRef.kind top level to from
Mesh ✅ ❌ ✅
MeshSubset ✅ ❌ ✅
MeshService ✅ ❌ ✅
MeshServiceSubset ✅ ❌ ✅

To learn more about the information in this table, see the matching docs.

Configuration

MeshFaultInjection allows configuring a list of HTTP faults. They execute in the same order as they were defined.

default:
  http:
    - abort:
        httpStatus: 500
        percentage: "2.5"
      delay:
        value: 5s
        percentage: 5
      responseBandwidth:
        limit: "50Mbps"
        percentage: 50
    - abort:
        httpStatus: 500
        percentage: 10
    - delay:
        value: 5s
        percentage: 5

It’s worth mentioning that percentage of the next filter depends on the percentage of previous ones.

http:
  - abort:
      httpStatus: 500
      percentage: 70
  - abort:
      httpStatus: 503
      percentage: 50

That means that for 70% of requests, it returns 500 and for 50% of the 30% that passed it returns 503.

Abort

Abort defines a configuration of not delivering requests to destination service and replacing the responses from destination data plane by predefined status code.

  • httpStatus - HTTP status code which will be returned to source side, has to be in [100 - 599] range
  • percentage - a percentage of requests on which abort will be injected, has to be in [0.0 - 100.0] range. If the value is a double number, put it in quotes.

Delay

Delay defines a configuration of delaying a response from a destination.

  • value - the duration during which the response will be delayed
  • percentage - a percentage of requests on which abort will be injected, has to be in [0.0 - 100.0] range. If the value is a double number, put it in quotes.

ResponseBandwidth limit

ResponseBandwidth defines a configuration to limit the speed of responding to requests.

  • limit - represented by value measure in Gbps, Mbps, kbps, or bps, for example 10kbps
  • percentage - a percentage of requests on which abort will be injected, has to be in [0.0 - 100.0] range. If the value is a double number, put it in quotes.

Examples

Service backend returns 500 for 50% of requests from frontend service

apiVersion: kuma.io/v1alpha1
kind: MeshFaultInjection
metadata:
  name: default-fault-injection
  namespace: kuma-system
  labels:
    kuma.io/mesh: default
spec:
  targetRef:
    kind: MeshSubset
    tags:
      app: backend
  from:
  - targetRef:
      kind: MeshSubset
      tags:
        kuma.io/service: frontend
    default:
      http:
      - abort:
          httpStatus: 500
          percentage: 50

50.5% of requests to service backend from any service is going to be delayed by 5 seconds

apiVersion: kuma.io/v1alpha1
kind: MeshFaultInjection
metadata:
  name: default-fault-injection
  namespace: kuma-system
  labels:
    kuma.io/mesh: default
spec:
  targetRef:
    kind: MeshSubset
    tags:
      app: backend
  from:
  - targetRef:
      kind: Mesh
      name: default
    default:
      http:
      - delay:
          percentage: '50.5'
          value: 5s

Backend service with a list of faults that are applied for frontend service

apiVersion: kuma.io/v1alpha1
kind: MeshFaultInjection
metadata:
  name: default-fault-injection
  namespace: kuma-system
  labels:
    kuma.io/mesh: default
spec:
  targetRef:
    kind: MeshSubset
    tags:
      app: backend
  from:
  - targetRef:
      kind: MeshSubset
      tags:
        kuma.io/service: frontend
    default:
      http:
      - abort:
          httpStatus: 500
          percentage: '2.5'
      - abort:
          httpStatus: 500
          percentage: 10
      - delay:
          value: 5s
          percentage: 5

All policy options

Spec is the specification of the Kuma MeshFaultInjection resource.

Type: object

Properties

  • from
    • From list makes a match between clients and corresponding configurations
    • Type: array
      • Items
      • Type: object
      • Properties
        • default
          • Default is a configuration specific to the group of destinations referenced in'targetRef'
          • Type: object
          • Properties
            • http
              • Http allows to define list of Http faults between dataplanes.
              • Type: array
                • Items
                • FaultInjection defines the configuration of faults between dataplanes.
                • Type: object
                • Properties
                  • abort
                    • Abort defines a configuration of not delivering requests to destinationservice and replacing the responses from destination dataplane bypredefined status code
                    • Type: object
                    • Properties
                      • httpStatus required
                        • HTTP status code which will be returned to source side
                        • Type: integer
                      • percentage required
                        • Percentage of requests on which abort will be injected, has to beeither int or decimal represented as string.
                  • delay
                    • Delay defines configuration of delaying a response from a destination
                    • Type: object
                    • Properties
                      • percentage required
                        • Percentage of requests on which delay will be injected, has to beeither int or decimal represented as string.
                      • value required
                        • The duration during which the response will be delayed
                        • Type: string
                  • responseBandwidth
                    • ResponseBandwidth defines a configuration to limit the speed ofresponding to the requests
                    • Type: object
                    • Properties
                      • limit required
                        • Limit is represented by value measure in gbps, mbps, kbps or bps, e.g.10kbps
                        • Type: string
                      • percentage required
                        • Percentage of requests on which response bandwidth limit will beeither int or decimal represented as string.
        • targetRef required
          • TargetRef is a reference to the resource that represents a group ofdestinations.
          • Type: object
          • Properties
            • kind
              • Kind of the referenced resource
              • Type: string
              • The value is restricted to the following:
                1. "Mesh"
                2. "MeshSubset"
                3. "MeshGateway"
                4. "MeshService"
                5. "MeshServiceSubset"
                6. "MeshHTTPRoute"
            • mesh
              • Mesh is reserved for future use to identify cross mesh resources.
              • Type: string
            • name
              • Name of the referenced resource. Can only be used with kinds: MeshService,MeshServiceSubset and MeshGatewayRoute
              • Type: string
            • tags
              • Tags used to select a subset of proxies by tags. Can only be used with kindsMeshSubset and MeshServiceSubset
              • Type: object
              • This schema accepts additional properties.
              • Properties
  • targetRef required
    • TargetRef is a reference to the resource the policy takes an effect on.The resource could be either a real store object or virtual resourcedefined inplace.
    • Type: object
    • Properties
      • kind
        • Kind of the referenced resource
        • Type: string
        • The value is restricted to the following:
          1. "Mesh"
          2. "MeshSubset"
          3. "MeshGateway"
          4. "MeshService"
          5. "MeshServiceSubset"
          6. "MeshHTTPRoute"
      • mesh
        • Mesh is reserved for future use to identify cross mesh resources.
        • Type: string
      • name
        • Name of the referenced resource. Can only be used with kinds: MeshService,MeshServiceSubset and MeshGatewayRoute
        • Type: string
      • tags
        • Tags used to select a subset of proxies by tags. Can only be used with kindsMeshSubset and MeshServiceSubset
        • Type: object
        • This schema accepts additional properties.
        • Properties

Generated with json-schema-md-doc Fri Apr 04 2025 07:44:36 GMT+0000 (Coordinated Universal Time)