use .Values.global.certificates instead

k8s/charts/seaweedfs/templates/cert/ca-cert.yaml

@@ -13,6 +13,12 @@ spec:
   secretName: {{ template "seaweedfs.name" . }}-ca-cert
   commonName: "{{ template "seaweedfs.name" . }}-root-ca"
   isCA: true
+  {{- if .Values.global.certificates.duration }}
+  duration: {{ .Values.global.certificates.duration }}
+  {{- end }}
+  {{- if .Values.global.certificates.renewBefore }}
+  renewBefore: {{ .Values.global.certificates.renewBefore }}
+  {{- end }}
   issuerRef:
     name: {{ template "seaweedfs.name" . }}-issuer
     kind: Issuer