Help Center/ Cloud Container Engine/ User Guide (Ankara Region)/ Network/ Container Network Settings/ Configuring QoS for a Pod
Updated on 2024-12-04 GMT+08:00
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Configuring QoS for a Pod

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.

Constraints

The following shows constraints on setting the rate limiting for inter-pod access:

Constraint Type

Tunnel network model

VPC Network Model

Supported versions

All versions

Clusters of v1.19.10 and later

Supported runtime types

Only common containers

Supported pod types

Only non-HostNetwork pods

Supported scenarios

Inter-pod access, pods accessing nodes, and pods accessing services

Constraints

None

None

Value range of rate limit

Only the rate limit in the unit of Mbit/s or Gbit/s is supported, for example, 100 Mbit/s and 1 Gbit/s. The minimum value is 1 Mbit/s and the maximum value is 4.29 Gbit/s.

Using the CCE Console

When creating a workload on the console, you can set pod ingress and egress bandwidth limits by clicking Network Configuration in the Advanced Settings area.

Using kubectl

You can add annotations to a workload to specify its egress and ingress bandwidth. 
apiVersion: apps/v1
kind: Deployment
metadata:
  name: test
  namespace: default
  labels:
    app: test
spec:
  replicas: 2
  selector:
    matchLabels: 
      app: test
  template:
    metadata:
      labels:
        app: test
      annotations:
        kubernetes.io/ingress-bandwidth: 100M
        kubernetes.io/egress-bandwidth: 100M
    spec:
      containers:
        - name: container-1
          image: nginx:alpine
          imagePullPolicy: IfNotPresent
      imagePullSecrets:
        - name: default-secret
  • 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.

After modifying the ingress or egress bandwidth limit of a pod, restart the container for the modification to take effect. After annotations are modified in a pod not managed by workloads, the container will not be restarted, so the bandwidth limits do not take effect. You can create a pod again or manually restart the container.