Helm，有没有办法将 kubernetes 标签添加到 values.yaml（不使用模板和 _helpers.tpl）

Question

So as in the title, I would like to add labels to my helms of my already running applications (sonarqube and jenkins from official helm charts). I don't have templates in them just values.yaml. I am afraid of adding templates, because as I said, application is already running and I just want to add few labels in metadata.

Answer 1

Both charts mentioned in comment under question has a way to define custom labels

https://github.com/jenkinsci/helm-charts/blob/main/charts/jenkins/templates/jenkins-master-deployment.yaml#L42

    {{- range $key, $val := .Values.master.podLabels }}
    {{ $key }}: {{ $val | quote }}
    {{- end}}

https://github.com/Oteemo/charts/blob/master/charts/sonarqube/templates/deployment.yaml#L31

{{- with .Values.podLabels }}
{{ toYaml . | indent 8 }}
{{- end }}

So you need something like this in values.yaml

# Jenkins
master:
  podLabels:
    label1Name: label1Value

# Sonar
podLabels:
  label1Name: label1Value

Answer 2

As described by @rkosegi this solution uses best practices while working with k8s configurations.

Please keep in mind, that users always should store configuration files ( Configuration Best Practices ). It allows us to quickly change/roll back any configuration in an easy way, using:

    kubectl apply -f ...
    kubectl replace ...

---

Another solutions:

• kubectl edit deployment <deployment_name>

• Update API Objects in Place Using kubectl patch :

---

a ) adding or changing existing labels:

#patch-file.yaml

spec:
  template:
    metadata:
      labels:
        test: label

kubectl patch deployment <deployment-name>  --patch "$(cat patch-file.yaml)"

b ) using a json patch approach, you can:

• add one new label " NewTest " with value " TestValue ":

kubectl patch deployment <deployment-name>  --type='json' -p='[{"op": "add", "path": "/spec/template/metadata/labels/NewTest", "value":"TestValue"}]'

• replace label " NewTest " with value " OldTest ":

kubectl patch deployment <deployment-name>  --type='json' -p='[{"op": "replace", "path": "/spec/template/metadata/labels/NewTest", "value": "OldTest"}]'

• remove label " NewTest ":

kubectl patch deployment <deployment-name>  --type='json' -p='[{"op": "remove", "path": "/spec/template/metadata/labels/NewTest"}]'        

---

Additional informations:

• JavaScript Object Notation (JSON) Patch
• kubectl patch reference