Kubernetes Helm, combine two variables with a string in the middle

kubernetes go-templates kubernetes-helm
Simon I picture Simon I · Jul 24, 2017 · Viewed 37.1k times · Source

I’m trying to change the value of a variable if another variable it set by combining the two with a dash in the middle, I’m not sure of the syntax to do this, I’m thinking of somethings like:

{{- $serviceNamespace := .Values.serviceNamespace -}}
{{- $serviceTag := .Values.serviceTag -}}
{{- if $serviceTag}}
{{- $serviceNamespace := .Values.serviceNamespace  "-" .Values.serviceTag -}}
{{- end}}

Is this correct? if serviceNamespace was hello and serviceTag was 1.0.0 would I end up with serviceNamespace being hello-1.0.0?

Answer

abinet picture abinet · Jul 25, 2017

For concatenation just use printf:

{{-  $serviceNamespace := printf "%s-%s" .Values.serviceNamespace .Values.serviceTag -}}

Related questions

Kubernetes Helm Chart If Condition Check

I am trying to add if great than condition in Helm chart. it is throwing error. I have defined value in values.yaml and using that value in deployment.yaml for condition. values.yaml replicaCount: 2 deployment.yaml rollingUpdate: maxSurge: 1 {{ if …

Read More
Helm _helpers.tpl: Calling defined templates in other template definitions

Helm _helpers.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" .…

Read More
Helm: generate comma separated list

Using Helm templates, I'm trying to generate a list of server names based on a number in values.yaml. The dot for this template is set to the number (its a float64). {{- define "zkservers" -}} {{- $zkservers := list -}} {{…

Read More