https://helm.sh/docs/chart_template_guide/yaml_techniques/#yaml-anchors
https://helm.sh/zh/docs/chart_template_guide/yaml_techniques/#yaml-%E9%94%9A%E7%82%B9
YAML also provides a handy feature called anchors, which let you easily duplicate
content across your document. Both of these keys will have the same value:
default: &default_title This Post Has No Title
title: *default_title
maps to:
18:40 $ helm install --dry-run --debug someapp/ |grep -i this
default: This Post Has No Title
title: This Post Has No Title
Doesn't allow for concatenation or more advanced combinations, but in some cases even this limited functionality may help a lot.
标签：title,default,No,yaml,other,values,helm From： https://www.cnblogs.com/exmyth/p/18372449