Change some practice

practice/18.templating/libchart/.helmignore

@@ -0,0 +1,23 @@
+# Patterns to ignore when building packages.
+# This supports shell glob matching, relative path matching, and
+# negation (prefixed with !). Only one pattern per line.
+.DS_Store
+# Common VCS dirs
+.git/
+.gitignore
+.bzr/
+.bzrignore
+.hg/
+.hgignore
+.svn/
+# Common backup files
+*.swp
+*.bak
+*.tmp
+*.orig
+*~
+# Various IDEs
+.project
+.idea/
+*.tmproj
+.vscode/

practice/18.templating/libchart/Chart.yaml

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+apiVersion: v2
+name: libchart
+description: A Helm chart for Kubernetes
+
+type: library
+#
+# # This is the chart version. This version number should be incremented each time you make changes
+# # to the chart and its templates, including the app version.
+version: 0.1.0
+#
+# # This is the version number of the application being deployed. This version number should be
+# # incremented each time you make changes to the application and it is recommended to use it with quotes.
+appVersion: "1.16.0"

practice/18.templating/libchart/templates/_configmap.yaml

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+{{- define "libchart.configmap.tpl" -}}
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: {{ .Release.Name | printf "%s-%s" .Chart.Name }}
+data: {}
+{{- end -}}
+{{- define "libchart.configmap" -}}
+{{- include "libchart.util.merge" (append . "libchart.configmap.tpl") -}}
+{{- end -}}

practice/18.templating/libchart/templates/_util.yaml

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+{{- /*
+libchart.util.merge will merge two YAML templates and output the result.
+This takes an array of three values:
+- the top context
+- the template name of the overrides (destination)
+- the template name of the base (source)
+*/}}
+{{- define "libchart.util.merge" -}}
+{{- $top := first . -}}
+{{- $overrides := fromYaml (include (index . 1) $top) | default (dict ) -}}
+{{- $tpl := fromYaml (include (index . 2) $top) | default (dict ) -}}
+{{- toYaml (merge $overrides $tpl) -}}
+{{- end -}}