helm: how to remove newline after toYaml function - kubernetes-helm

Question

From official documentation:
When the template engine runs, it removes the contents inside of {{ and }}, but it leaves the remaining whitespace exactly as is. The curly brace syntax of template declarations can be modified with special characters to tell the template engine to chomp whitespace. {{- (with the dash and space added) indicates that whitespace should be chomped left, while -}} means whitespace to the right should be consumed.
But I try all variations with no success. Have anyone solution how to place yaml inside yaml? I don't want to use range
apiVersion: v1
kind: Pod
metadata:
name: app
labels:
app: app
spec:
containers:
- name: app
image: image
volumeMounts:
- mountPath: test
name: test
resources:
{{ toYaml .Values.pod.resources | indent 6 }}
volumes:
- name: test
emptyDir: {}
when I use this code without -}} it's adding a newline:
resources:
limits:
cpu: 100m
memory: 128Mi
requests:
cpu: 20m
memory: 64Mi
volumes:
- name: test
emptyDir: {}
but when I use -}} it's concate with another position.
resources:
limits:
cpu: 100m
memory: 128Mi
requests:
cpu: 20m
memory: 64Mi
volumes: <- shoud be in indent 2
- name: test
emptyDir: {}
values.yaml is
pod:
resources:
requests:
cpu: 20m
memory: 64Mi
limits:
cpu: 100m
memory: 128Mi

Answer 1

This worked for me:
{{ toYaml .Values.pod.resources | trim | indent 6 }}

Answer 2

The below variant is correct:
{{ toYaml .Values.pod.resources | indent 6 }}
Adding a newline doesn't create any issue here.
I've tried your pod.yaml and got the following error:
$ helm install .
Error: release pilfering-pronghorn failed: Pod "app" is invalid: spec.containers[0].volumeMounts[0].mountPath: Invalid value: "test": must be an absolute path
which means that mountPath of volumeMounts should be something like /mnt.
So, the following pod.yaml works pretty good and creates a pod with the exact resources we defined in values.yaml:
apiVersion: v1
kind: Pod
metadata:
name: app
labels:
app: app
spec:
containers:
- name: app
image: image
volumeMounts:
- mountPath: /mnt
name: test
resources:
{{ toYaml .Values.pod.resources | indent 6 }}
volumes:
- name: test
emptyDir: {}

Answer 3

{{- toYaml .Values.pod.resources | indent 6 -}}
This removes a new line

Answer 4

#Nickolay, it is not a valid yaml file, according to helm - at least helm barfs and says:
error converting YAML to JSON: yaml: line 51: did not find expected key
For me, line 51 is the empty space - and whatever follows should not be indented to the same level