How to patch configmap in json file with kustomize?

Question

How to patch "db.password" in the following cm with kustomize?

comfigmap:

apiVersion: v1
data:
  dbp.conf: |-
    {
      "db_properties": {
        "db.driver": "com.mysql.jdbc.Driver",
        "db.password": "123456",
        "db.user": "root"
      }
    }

kind: ConfigMap
metadata:
  labels: {}
  name: dbcm

score 1 · Answer 1 · answered Nov 12 '19 at 04:48

1

you can create new file with updated values and use command replace along wih create

kubectl create configmap NAME --from-file file.name -o yaml --dry-run | kubectl replace -f -

answered Nov 12 '19 at 04:48

Harsh Manvar

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3

thanks, I need to patch it with kustomize. just like patch yaml file. – Lior Nov 12 '19 at 06:49
if you have file with you can update the file value and run kubectl apply command it will replace existing value in configmap. – Harsh Manvar Nov 12 '19 at 06:54
op asked about kustomize and not kubectl way of patching cm. – f-z-N Jan 28 '21 at 19:56
2

https://github.com/kubernetes-sigs/kustomize/issues/680 – Harsh Manvar Jan 29 '21 at 03:49
1

https://github.com/kubernetes-sigs/kustomize/issues/3787 – Jonas Kello Sep 04 '21 at 08:49

score 1 · Answer 2 · answered Oct 13 '22 at 05:16

create a placeholder in your file and replace it with real data while applying kustomize

your code will be like this:

#!/bin/bash
sed -i "s/PLACE-HOLDER/123456/g" db_config.yaml
kustomize config.yaml >> kustomizeconfig.yaml
kubectl apply -f kustomizeconfig.yaml -n foo

And the db_config file will be:

apiVersion: v1
data:
  dbp.conf: |-
    {
      "db_properties": {
        "db.driver": "com.mysql.jdbc.Driver",
        "db.password": "PLACE_HODLER",
        "db.user": "root"
      }
    }

kind: ConfigMap
metadata:
  labels: {}
  name: dbcm

NB: This should be running on the pipeline to have the config file cloned from repo, so the real file won't be updated.

How to patch configmap in json file with kustomize?

2 Answers2