HELM Kubernetes - Multiple subcharts with differents .Values properties

Question

I'm trying to create a chart with multiple subcharts ( 2 instances of ibm-db2oltp-dev). Is there a way to define in the same values.yaml file, different configuration for each instance?

I need two databases:

db2inst.instname: user1
db2inst.password: password1
options.databaseName: dbname1

db2inst.instname: user2
db2inst.password: password2
options.databaseName: dbname2

I saw it could be done via alias but I didn't find an example explaining how to do it. Is it possible?

Answer 1

Yes, it is possible:

In Chart.yaml for Helm 3 or in requirements.yaml for Helm 2:

dependencies:
  - name: ibm-db2oltp-dev                *(full chart name here)*
    repository: http://localhost:10191   *(Actual repository url here)*
    version: 0.1.0                       *(Required version)*
    alias: db1inst                       *(The name of the chart locally)*
  - name: ibm-db2oltp-dev
    repository: http://localhost:10191
    version: 0.1.0
    alias: db2inst

parentChart/values.yaml:

someParentChartValueX: x
someParentChartValueY: y

db1inst:
  instname: user1
  db2inst: password1

db2inst:
  instname: user2
  db2inst: password2

Answer 2

Actually it cannot be achieved in Helm (by aliases too) because values resolving doesn't work for aliased charts. The only way is to define values for chart name:

<chart_name not alias>:
  var1: value
  var2: value

The source issue: https://github.com/helm/helm/issues/7093