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Configuring QoS Rate Limiting for Inter-Pod Access

Scenario

Bandwidth preemption occurs between different containers deployed on the same node, which may cause service jitter. You can configure QoS rate limiting for inter-pod access to prevent this problem.

Notes and Constraints

  • Only clusters later than v1.19.10 are supported.
  • Only clusters that use the Cloud Native Network 2.0 and VPC network models are supported.
  • Only common containers (runC as the container runtime) are supported. Secure containers (Kata Containers as the container runtime) are not supported.
  • Only the rate of access from pods to pods is limited. Access to nodes and external access are not affected.

Procedure

You can add annotations to a pod to specify its egress and ingress bandwidth.

apiVersion: v1
kind: Pod
metadata:
  annotations:
    kubernetes.io/ingress-bandwidth: 100M
    kubernetes.io/egress-bandwidth: 100M
...
  • kubernetes.io/ingress-bandwidth: ingress bandwidth of the pod
  • kubernetes.io/egress-bandwidth: egress bandwidth of the pod

If these two parameters are not specified, the bandwidth is not limited.

Parent topic: Workloads