Example of generating multiple resources from a single template file

[oxr463]

In the values.yaml file, we could specify several sites:

sites:
 - name: foo
 source: "foo.com"
 - name: bar
 source: "bar.com
 - name: baz
 source: "baz.com

Then the chart would generate three deployments and three services, one for each site.

Then we could add an ingress that includes each of the services:

spec:
 rules:
 - host: hello-world.com
 http:
 paths:
 - backend:
 service:
 name: foo
 port:
 name: http
 path: /foo
 pathType: Prefix
 - backend:
 service:
 name: bar
 port:
 name: http
 path: /bar
 pathType: Prefix
 - backend:
 service:
 name: baz
 port:
 name: http
 path: /baz
 pathType: Prefix

Then each site would be accessible via the following URLs:

• hello-world.com/foo
• hello-world.com/bar
• hello-world.com/baz

[oxr463]

I created a new chart:

helm create hello-world-multiple
cd hello-world-multiple
helm template hello-world .

Here is the modified template/deployment.yaml file:

{{- range $key, $value := .Values.repositories }}
---
apiVersion: apps/v1
kind: Deployment
metadata:
 name: {{ $value.name }}
 labels:
 {{- include "hello-world-multiple.labels" $ | nindent 4 }}
spec:
 {{- if not $.Values.autoscaling.enabled }}
 replicas: {{ $.Values.replicaCount }}
 {{- end }}
 selector:
 matchLabels:
 {{- include "hello-world-multiple.selectorLabels" $ | nindent 6 }}
 template:
 metadata:
 {{- with $.Values.podAnnotations }}
 annotations:
 {{- toYaml $ | nindent 8 }}
 {{- end }}
 labels:
 {{- include "hello-world-multiple.selectorLabels" $ | nindent 8 }}
 spec:
 {{- with $.Values.imagePullSecrets }}
 imagePullSecrets:
 {{- toYaml $ | nindent 8 }}
 {{- end }}
 serviceAccountName: {{ include "hello-world-multiple.serviceAccountName" $ }}
 securityContext:
 {{- toYaml $.Values.podSecurityContext | nindent 8 }}
 containers:
 - name: hello-world
 securityContext:
 {{- toYaml $.Values.securityContext | nindent 12 }}
 image: "{{ $.Values.image.repository }}:{{ $.Values.image.tag | default $.Chart.AppVersion }}"
 imagePullPolicy: {{ $.Values.image.pullPolicy }}
{{- end }}

[oxr463]

Reference(s):

• Using .Chart.name in range function helm#3684
• https://stackoverflow.com/a/56225254/8507637