configmap作为环境变量和文件同时mount到一个pod

[root@k8s-master lab7]# kubectl get configmap
NAME      DATA      AGE
map       1         16m
[root@k8s-master lab7]# kubectl get configmap -o yaml
apiVersion: v1
items:
- apiVersion: v1
  data:
    configmap.md: |    <<<<<<<<<<<<< 作为key 引用时候这是key名称，作为volumemount时候这是文件名
      hahahahah         <<<<<<<<<<<<<key的value或文件里的内容
  kind: ConfigMap
  metadata:
    creationTimestamp: 2018-08-08T10:15:16Z
    name: map
    namespace: default
    resourceVersion: "137633"
    selfLink: /api/v1/namespaces/default/configmaps/map
    uid: f2540927-9af3-11e8-8140-000c29850765
kind: List
metadata:
  resourceVersion: ""
  selfLink: ""

[root@k8s-master lab7]# cat mysql-configmap.yaml
apiVersion: v1
kind: Pod
metadata:
 name: mysql
spec:
 containers:
 - name: mysql
   image: mysql:5.5
   env:
   - name: MYSQL_ROOT_PASSWORD
     valueFrom:
      configMapKeyRef:
       name: map
       key: configmap.md <<<<<<<<<<<<<<<<<<<<<<<<<key是文件名
   imagePullPolicy: IfNotPresent
   volumeMounts:
   - mountPath: /configmappath
     name: map
 volumes:
 - name: map
   configMap:
    name: map   <<<<<<<<volume挂载configmap中的data里的所有内容，一个key就对应一个文件
 restartPolicy: Always

[root@k8s-master lab7]# kubectl exec -it mysql bash
root@mysql:/# pwd
/
root@mysql:/# ls
bin  boot  configmappath  dev  docker-entrypoint-initdb.d  entrypoint.sh  etc  home  lib  lib64  media	mnt  opt  proc	root  run  sbin  srv  sys  tmp	usr  var
root@mysql:/# cd configmappath/
root@mysql:/configmappath# ls
configmap.md  <<<<<<<<<<<<<<<<<<<<<<<<<mount进来的文件名
root@mysql:/configmappath# more configmap.md
hahahahah <<<<<<<<<<<<<<<<<<<<<<<<<文件里面的内容
root@mysql:/configmappath# env
HOSTNAME=mysql
KUBERNETES_PORT_443_TCP_PROTO=tcp
KUBERNETES_PORT_443_TCP_ADDR=10.250.0.1
MYSQL_ROOT_PASSWORD=hahahahah <<<<<<<<<<<<<<<<<<<<<<<<<Key内容作为环境变量值

KUBERNETES_PORT=tcp://10.250.0.1:443
PWD=/configmappath
HOME=/root
MYSQL_MAJOR=5.5
GOSU_VERSION=1.7
KUBERNETES_SERVICE_PORT_HTTPS=443
KUBERNETES_PORT_443_TCP_PORT=443
MYSQL_VERSION=5.5.61
KUBERNETES_PORT_443_TCP=tcp://10.250.0.1:443
TERM=xterm
SHLVL=1
KUBERNETES_SERVICE_PORT=443
PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/local/mysql/bin:/usr/local/mysql/scripts
KUBERNETES_SERVICE_HOST=10.250.0.1
_=/usr/bin/env
OLDPWD=/