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
The Helm template syntax is based on the Go programming language's text/template package. The braces {{ and }} are the opening and closing brackets to enter and exit template logic.
The above includes a template called toYaml , passes it $value , and then passes the output of that template to the indent function. Because YAML ascribes significance to indentation levels and whitespace, this is one great way to include snippets of code, but handle indentation in a relevant context.
The $_ is used to suppress undesired output as "set" returns the new dictionary. The above returns: - name: mongod-none. Any values added to the dictionary will live beyond the call. If you want to avoid polluting an existing dictionary you can force a deep copy with: {{- $d := merge (dict) . -}}
tpl? Helm allows for the use of Go templating in resource files for Kubernetes. A file named _helpers.tpl is usually used to define Go template helpers with this syntax: {{- define "yourFnName" -}} {{- printf "%s-%s" .Values.name .Values.version | trunc 63 -}} {{- end -}}
This worked for me:
{{ toYaml .Values.pod.resources | trim | indent 6 }}
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: {}
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