数据键值对，作为Pod的配置文件或环境变量。
configmap的数据可以来自三种类型：字面量，文件和目录
bash
mkdir primary
echo g > primary/green
echo r > primary/red
echo y > primary/yellow
echo k > primary/black
echo "known as key" >> primary/black
echo blue > favorite
kubectl create configmap colors \
--from-literal=text=black \
--from-file=./favorite \
--from-file=./primary/
kubectl get configmap colors
kubectl get configmap colors -o yamlsimpleshell.yaml
yaml
apiVersion: v1
kind: Pod
metadata:
name: shell-demo
spec:
containers:
- name: nginx
image: nginx
env:
- name: ilike
valueFrom:
configMapKeyRef:
name: colors
key: favoritebash
kubectl create -f simpleshell.yaml
kubectl exec shell-demo -- /bin/bash -c 'echo $ilike'
kubectl delete pod shell-demo也可以把全部的文件内容作为环境变量传入Pod。稍微修改下simpleshell2.yaml
yaml
apiVersion: v1
kind: Pod
metadata:
name: shell-demo2
spec:
containers:
- name: nginx
image: nginx
# env:
# - name: ilike
# valueFrom:
# configMapKeyRef:
# name: colors
# key: favorite
envFrom:
- configMapRef:
name: colorskubectl exec shell-demo -- /bin/bash -c 'env'
yaml
kind: ConfigMap
apiVersion: v1
metadata:
name: redis-conf
namespace: iot-ningxia
annotations:
kubesphere.io/creator: admin
data:
redis.conf: |-
appendonly yes
port 6379
bind 0.0.0.0挂载到StatefulSet的Pod中
yaml
kind: StatefulSet
apiVersion: apps/v1
metadata:
name: redis
namespace: iot-ningxia
labels:
app: redis
annotations:
kubesphere.io/creator: mafei
spec:
serviceName: redis
replicas: 1
selector:
matchLabels:
app: redis
template:
metadata:
labels:
app: redis
spec:
volumes:
- name: volume-redis-conf
configMap:
name: redis-conf
containers:
- name: redis
image: 'redis:6'
command:
- redis-server
args:
- /etc/redis/redis.conf
ports:
- name: tcp-6379
containerPort: 6379
protocol: TCP
volumeMounts:
- name: volume-redis-conf
readOnly: true
mountPath: /etc/redis
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