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