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Using ~ (null) in Helm: Deleting Default Values and Handling Optional Fields
You override a chart’s default livenessProbe with an exec command, deploy, and Kubernetes rejects it: “may not specify more than one handler type.” The chart’s default httpGet probe is still there, merged underneath your override, and now the pod spec has two probe handlers. You didn’t add it. You can’t see it in your values file. And the fix is a single character: ~. That ~ is YAML’s null, and in Helm it does something most people never learn: setting a key to null deletes it from the merged values entirely, instead of setting it to a null value. It’s…
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