K8s valueFrom

1 개요

k8s valueFrom

2 fieldRef

k8s fieldRef 문서를 참고하십시오.

yaml

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apiVersion: v1
kind: Pod
metadata:
  name: dapi-envars-fieldref
spec:
  containers:
  - name: test-container
    image: k8s.gcr.io/busybox
    command: [ "sh", "-c"]
    args:
    - while true; do
        echo -en '\n';
        printenv MY_NODE_NAME MY_POD_NAME MY_POD_NAMESPACE;
        printenv MY_POD_IP MY_POD_SERVICE_ACCOUNT;
        sleep 10;
      done;
    env:
    - name: MY_NODE_NAME
      valueFrom:
        fieldRef:
          fieldPath: spec.nodeName
    - name: MY_POD_NAME
      valueFrom:
        fieldRef:
          fieldPath: metadata.name
    - name: MY_POD_NAMESPACE
      valueFrom:
        fieldRef:
          fieldPath: metadata.namespace
    - name: MY_POD_IP
      valueFrom:
        fieldRef:
          fieldPath: status.podIP
    - name: MY_POD_SERVICE_ACCOUNT
      valueFrom:
        fieldRef:
          fieldPath: spec.serviceAccountName

3 resourceFieldRef

yaml

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apiVersion: v1
kind: Pod
metadata:
  name: dapi-envars-resourcefieldref
spec:
  containers:
  - name: test-container
    image: k8s.gcr.io/busybox:1.24
    command: [ "sh", "-c"]
    args:
    - while true; do
        echo -en '\n';
        printenv MY_CPU_REQUEST MY_CPU_LIMIT;
        printenv MY_MEM_REQUEST MY_MEM_LIMIT;
        sleep 10;
      done;
    resources:
      requests:
        memory: "32Mi"
        cpu: "125m"
      limits:
        memory: "64Mi"
        cpu: "250m"
    env:
    - name: MY_CPU_REQUEST
      valueFrom:
        resourceFieldRef:
          containerName: test-container
          resource: requests.cpu
    - name: MY_CPU_LIMIT
      valueFrom:
        resourceFieldRef:
          containerName: test-container
          resource: limits.cpu
    - name: MY_MEM_REQUEST
      valueFrom:
        resourceFieldRef:
          containerName: test-container
          resource: requests.memory
    - name: MY_MEM_LIMIT
      valueFrom:
        resourceFieldRef:
          containerName: test-container
          resource: limits.memory

4 configMapKeyRef

k8s configMapKeyRef 문서를 참고하십시오.

yaml

Copy

apiVersion: v1
kind: Pod
metadata:
  name: dapi-test-pod
spec:
  containers:
  - name: test-container
    image: k8s.gcr.io/busybox
    command: [ "/bin/echo", "$(SPECIAL_LEVEL_KEY) $(SPECIAL_TYPE_KEY)" ]
    env:
    - name: SPECIAL_LEVEL_KEY
      valueFrom:
        configMapKeyRef:
          name: special-config
          key: SPECIAL_LEVEL
    - name: SPECIAL_TYPE_KEY
      valueFrom:
        configMapKeyRef:
          name: special-config
          key: SPECIAL_TYPE

yaml

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apiVersion: v1
kind: ConfigMap
metadata:
  name: special-config
  namespace: default
data:
  SPECIAL_LEVEL: very
  SPECIAL_TYPE: charm

5 같이 보기

• k8s env
• k8s envFrom