容器的资源需求，资源限制

• requests:需求，最低保障；
• limits：限制，硬限制；

CPU： 1 颗逻辑 CPU 1=1000，millicores 500m=0.5CPU

QoS：

1. Guranteed : 每个容器 同时设置CPU和内存的requests和limits 即 :cpU.limits=cpu.request, memory.limits=memory.requests

2. Burstable：至少有一个容器设置CPU或内存资源的requests属性

3. BestEffort：没有任何一个容器设置了requests或limits属性

   查看节点上的 taint

   kubectl describe nodes node1 |grep -E '(Roles|Taints)' kubectl describe nodes node2 |grep -E '(Roles|Taints)'

   kubectl taint node node1 node-type- kubectl taint node node2 node-type-

   mkdir ~/metrics ; cd ~/metrics

   vi pod-demo.yaml apiVersion: v1 kind: Pod metadata: name: pod-demo labels: app: myapp tier: frontend spec: containers:

   • name: myapp image: ikubernetes/stress-ng command: ["/usr/bin/stress-ng", "-c 1", "--metrics-brief"] resources: requests: cpu: "200m" memory: "128Mi" limits: cpu: "500m" memory: "512Mi"

   kubectl apply -f pod-demo.yaml

   kubectl exec pod-demo -- top

   查看 Qos

   kubectl describe pod pod-demo|grep "QoS Class"