Kustomize: Disabling hashed ConfigMap when using configMapGenerator

kustomize configMapGenerator ConfigMap

2 min read | by Jordi Prats

When we try to use configMapGenerator to generate a ConfigMap containing some files like this:

configMapGenerator:
- name: config-files
  behavior: create
  files:
  - files/file1.txt
  - files/file2.txt

By default, it is going to append a hash to it:

$ kubectl get configmap
NAME                          DATA   AGE
config-files-m55tkfhh8f       2      45d

If we need to access this ConfigMap by name we might want to remove the hash.

To do so we have two options, add the disableNameSuffixHash: true flag to all the different ConfigMaps we are defining:

configMapGenerator:
- name: config-files
  disableNameSuffixHash: true
  behavior: create
  files:
  - files/file1.txt
  - files/file2.txt

Or use the generatorOptions key to set a default for the entire kustomize.yaml file:

generatorOptions:
  disableNameSuffixHash: true

configMapGenerator:
- name: config-files
  behavior: create
  files:
  - files/file1.txt
  - files/file2.txt

Either way, kustomize is going to create the ConfigMap without appending any hash to it:

$ kubectl get configmap
NAME               DATA   AGE
config-files       2      45d

Posted on 07/03/2023

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