代码语言：javascript复制
volumeMounts:
- name: config-volume
mountPath: /path/dir/file //代表要挂载到容器的位置
subPath: items.path //代表选择要挂载的项,对应items.path的值，如果不指定代表全挂
volumes:
- name: config-volume
configMap:
name: test-cfg //被挂载的configmap name
items:
- key: key_name //configmap里面的key的名字
path: path/file_name或者file_name //代表key的别名，volumeMounts.subpath匹配key的别名，也代表挂载后的路径或文件名subPathExpr能根据pod名字来挂载，如将/var/log/pods/xxx/ 挂载到pod的/logs下：
代码语言：javascript复制apiVersion: v1
kind: Pod
metadata:
name: pod1
spec:
containers:
- name: container1
env:
- name: POD_NAME
valueFrom:
fieldRef:
apiVersion: v1
fieldPath: metadata.name
image: busybox
command: [ "sh", "-c", "while [ true ]; do echo 'Hello'; sleep 10; done | tee -a /logs/hello.txt" ]
volumeMounts:
- name: workdir1
mountPath: /logs
subPathExpr: $(POD_NAME)
restartPolicy: Neve
volumes:
- name: workdir1
hostPath:
path: /var/log/pods# ll /var/log/pods/default_pod1_bf63569f-3155-4ab4-808e-b8d72b608431/container1/0.log lrwxrwxrwx 1 root root 165 Mar 9 11:37 /var/log/pods/default_pod1_bf63569f-3155-4ab4-808e-b8d72b608431/container1/0.log -> /var/lib/docker/containers/77bfd2e8b05f3177e42381cda6d521ec3b74c1c454efb0cf3982996505c7dd59/77bfd2e8b05f3177e42381cda6d521ec3b74c1c454efb0cf3982996505c7dd59-json.log
相关增强功能：
https://github.com/kubernetes/enhancements/issues/559
示例configmap
代码语言：javascript复制apiVersion: v1
data:
app.properties: |
property.1 = value-1
property.2 = value-2
property.3 = value-3
cache_host: mysql-k8s
kind: ConfigMap
metadata:
name: test-cfg1使用volume将ConfigMap作为文件或目录直接挂载，其中每一个key-value键值对都会生成一个文件，key为文件名，value为内容
代码语言：javascript复制 volumeMounts:
- name: config-volume
mountPath: /etc/config
volumes:
- name: config-volume
configMap:
name: test-cfgroot@testvolume:/etc/config# ls -l ##对照发现，使用volume将ConfigMap作为文件或目录直接挂载，其中每一个key-value键值对都会生成一个文件，key为文件名，value为内容
total 0
lrwxrwxrwx 1 root root 21 Apr 12 00:59 app.properties -> ..data/app.properties
lrwxrwxrwx 1 root root 17 Apr 12 00:59 cache_host -> ..data/cache_host2.另一种方式，只挂载某个key,并支持相对路径，其中一个key生成的文件路径名和文件名相同
代码语言：javascript复制---
volumeMounts:
- name: config-volume
mountPath: /etc/config
volumes:
- name: config-volume
configMap:
name: test-cfg
items:
- key: cache_host
path: path/to/special-key-cache #path中的最后一级“special-key-cache”为文件名
- key: app.properties
path: app.propertiesroot@testvolume:/etc/config# cat app.properties ##说明key:app.properties的path项用文件名相当于没有起任何作用
property.1 = value-1
property.2 = value-2
property.3 = value-3
root@testvolume:/etc/config# pwd
/etc/config
root@testvolume:/etc/config# cd path/to/special-key-cache
bash: cd: path/to/special-key-cache: Not a directory
root@testvolume:/etc/config/path/to# pwd
/etc/config/path/to
root@testvolume:/etc/config/path/to# ls
special-key-cache3.有subPath时且subPath推荐筛选结果为true，mountPath指定到文件名,(只挂载subpath选择的path到mountpath)---
代码语言：javascript复制volumeMounts:
- name: config-volume
mountPath: /etc/config/app.properties #此处配合suPath使用时，app.properties为文件名，即pod容器中只生成了/etc/config目录，目录之下 为文件，只有一个名为app.properties的文件（subPath筛选只挂载app.properties文件）
subPath: app.properties
volumes:
- name: config-volume
configMap:
name: test-cfg
items:
- key: cache_host
path: path/to/special-key-cache
- key: app.properties
path: app.propertiesroot@testvolume:/etc/config# cat app.properties
property.1 = value-1
property.2 = value-2
property.3 = value-34.有subPath但筛选结果为false, 容器中生成一个空目录/etc/config/app.properties，无文件---
代码语言：javascript复制 volumeMounts:
- name: config-volume
mountPath: /etc/config/app.properties #此时此处app.properties为文件名
subPath: app.properties
volumes:
- name: config-volume
configMap:
name: test-cfg
items:
- key: cache_host
path: path/to/special-key-cache
- key: app.properties
path: app-properties #此处path相当于更改文件名mv app.properties app-properties root@testvolume:/etc/config# cd app.properties
root@testvolume:/etc/config/app.properties# ls
root@testvolume:/etc/config/app.properties# ls #此目录下为空5.无 subPath,path相当于重命名---
代码语言：javascript复制 volumeMounts:
- name: config-volume
mountPath: /etc/config/app.properties ##此处app.properties为目录
# subPath: app.properties
volumes:
- name: config-volume
configMap:
name: test-cfg
items:
- key: cache_host
path: path/to/special-key-cache
- key: app.properties
path: app-properties #此处path相当于更改文件名mv app.properties app-properties root@testvolume:/etc/config/app.properties# cat app-properties
property.1 = value-1
property.2 = value-2
property.3 = value-3
root@testvolume:/etc/config/app.properties/path/to# cat special-key-cache
mysql-k8s6.有subPath且筛选结果为true,mouthPath指定文件名，可以和subPath不一样
---
代码语言：javascript复制 volumeMounts:
- name: config-volume
mountPath: /etc/config/app.properties #此处app.properties为文件名
subPath: app-properties #改为与mountPath不一样的文件名时，subPath相当于通过volume筛选configMap中的key(此处为因volumes.configMap.items.path对key进行了重命名)中的条目，即存在subPath时，subPath决定有无，mountPath决定文件名
volumes:
- name: config-volume
configMap:
name: test-cfg
items:
- key: cache_host
path: path/to/special-key-cache
- key: app.properties
path: app-properties---
代码语言：javascript复制root@testvolume:/etc/config# cat app.properties
property.1 = value-1
property.2 = value-2
property.3 = value-37.有subPath且筛选结果为true,mouthPath指定文件名，可以和subPath不一样，甚至随意指定为z.txt---
代码语言：javascript复制 volumeMounts:
- name: config-volume
mountPath: /etc/config/z.txt #subPath决定有无，mountPath决定文件名为z.txt
subPath: app-properties
volumes:
- name: config-volume
configMap:
name: test-cfg
items:
- key: cache_host
path: path/to/special-key-cache
- key: app.properties
path: app-properties---
代码语言：javascript复制root@testvolume:/etc/config# cat z.txt
property.1 = value-1
property.2 = value-2
property.3 = value-3
