问题
Getting this error.
Error: failed to prepare subPath for volumeMount "solr-collection-config" of container "upload-config-container"
Using kubernetes 1.10.11
- name: upload-config-container
image: solr:7.4.0-alpine
imagePullPolicy: Always
resources:
requests:
memory: "128Mi"
cpu: "100m"
limits:
memory: "256Mi"
cpu: "200m"
volumeMounts:
- name: solr-collection-config
mountPath: /tell/carbon/conf
subPath: conf
solr-collection-config is a volume that represents a ConfigMap
volumes:
- name: solr-collection-config
configMap:
name: solr-collection-resources
items:
- key: stopwords_en.txt
path: "conf/lang/stopwords_en.txt"
- key: _rest_managed.json
path: "conf/_rest_managed.json"
- key: currency.xml
path: "conf/currency.xml"
- key: protwords.txt
path: "conf/protwords.txt"
- key: schema.xml
path: "conf/schema.xml"
- key: solrconfig.xml
path: "conf/solrconfig.xml"
- key: stopwords.txt
path: "conf/stopwords.txt"
- key: synonyms.txt
path: "conf/synonyms.txt"
restartPolicy: Never
Help is kindly appreciated. Thank you
回答1:
What happens if you do not use subPath?
All keys from configMap will be mounted in directory /tell/carbon/conf. That means, every key will be a separate file under this directory.
Now, what this subPath does? From your example,
volumeMounts:
- name: solr-collection-config
mountPath: /tell/carbon/conf
subPath: conf
Means, key conf from configMap will be mounted as file conf under /tell/carbon directory.
But, you do not have this key. So getting this error.
Error: failed to prepare subPath for volumeMount "solr-collection-config" of container "upload-config-container"
Now, you can do like this
volumeMounts:
- name: solr-collection-config
mountPath: /tell/carbon/conf
subPath: stopwords_en.txt
Which means, value of stopwords_en.txt from your configMap will be mounted as conf file under /tell/carbon.
Final words, this subPath is actually a path from volume, from where your data is coming. In your case, subPath should be one of the key from your configMap
来源：https://stackoverflow.com/questions/53860721/failed-to-prepare-subpath-for-volumemount