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41.5. 从 Pod 中查找内存请求和限制
希望从 pod 中动态发现内存请求和限制的应用程序应该使用 Downward API。下列代码片段演示了如何完成此操作。
apiVersion: v1
kind: Pod
metadata:
name: test
spec:
containers:
- name: test
image: fedora:latest
command:
- sleep
- "3600"
env:
- name: MEMORY_REQUEST
valueFrom:
resourceFieldRef:
containerName: test
resource: requests.memory
- name: MEMORY_LIMIT
valueFrom:
resourceFieldRef:
containerName: test
resource: limits.memory
resources:
requests:
memory: 384Mi
limits:
memory: 512Mi# oc rsh test $ env | grep MEMORY | sort MEMORY_LIMIT=536870912 MEMORY_REQUEST=402653184
内存限制值也可由 /sys/fs/cgroup/memory/memory.limit_in_bytes 文件从容器内部读取。