Pod可以通过resources 下的limits 标签，限制容器可以使用的内存或者CPU，通过requests 表明容器需要多少内存或者 CPU。调度系统会根据系统节点的资源量，保证节点有足够的资源留给对应的pod。
CPU requests and limits are associated with Containers, but it is useful to think of a Pod as having a CPU request and limit. The CPU request for a Pod is the sum of the CPU requests for all the Containers in the Pod. Likewise, the CPU limit for a Pod is the sum of the CPU limits for all the Containers in the Pod.
Pod scheduling is based on requests. A Pod is scheduled to run on a Node only if the Node has enough CPU resources available to satisfy the Pod’s CPU request.
一个简单的针对pod限制内存和cpu的例子模板如下:
apiVersion: v1
kind: Pod
metadata:
name: cpu-demo-2
namespace: cpu-example
spec:
containers:
- name: cpu-demo-ctr-2
image: vish/stress
resources:
limits:
cpu: "1"
requests:
cpu: "0.5"
args:
- -cpus
- "2"