feat: add --ignore-annotation flag to override reloader.stakater.com/ignore

Allow users to customise the annotation key used to mark ConfigMaps and
Secrets as ignored by Reloader, consistent with how every other annotation
key is already overridable via a dedicated CLI flag.

Changes:
- internal/pkg/util/util.go: register --ignore-annotation persistent flag
  backed by options.IgnoreResourceAnnotation
- deployments/kubernetes/chart/reloader/templates/deployment.yaml: pass
  --ignore-annotation when custom_annotations.ignore is set in Helm values
- deployments/kubernetes/chart/reloader/values.yaml: document the new
  custom_annotations.ignore key in the example comment
- README.md: add --ignore-annotation to the Annotation Key Overrides table
  and mention the flag alongside the Resource-Level Ignore Annotation section

Co-authored-by: Cursor <cursoragent@cursor.com>

Author: riptide-01

README.md

@@ -440,6 +440,7 @@ These flags allow you to redefine annotation keys used in your workloads or reso
 | `--search-match-annotation` | Overrides `reloader.stakater.com/match` |
 | `--secret-annotation` | Overrides `secret.reloader.stakater.com/reload` |
 | `--configmap-annotation` | Overrides `configmap.reloader.stakater.com/reload` |
+| `--ignore-annotation` | Overrides `reloader.stakater.com/ignore` |
 | `--pause-deployment-annotation` | Overrides `deployment.reloader.stakater.com/pause-period` |
 | `--pause-deployment-time-annotation` | Overrides `deployment.reloader.stakater.com/paused-at` |
 

deployments/kubernetes/chart/reloader/templates/deployment.yaml

@@ -277,6 +277,10 @@ spec:
             {{- if .Values.reloader.custom_annotations.match }}
           - "--search-match-annotation"
           - "{{ .Values.reloader.custom_annotations.match }}"
+            {{- end }}
+            {{- if .Values.reloader.custom_annotations.ignore }}
+          - "--ignore-annotation"
+          - "{{ .Values.reloader.custom_annotations.ignore }}"
             {{- end }}
             {{- if .Values.reloader.custom_annotations.pausePeriod }}
           - "--pause-deployment-annotation"

deployments/kubernetes/chart/reloader/values.yaml

@@ -213,6 +213,7 @@ reloader:
   #   custom_annotations:
   #     configmap: "my.company.com/configmap"
   #     secret: "my.company.com/secret"
+  #     ignore: "my.company.com/reloader-ignore"
   custom_annotations: {}
 
   serviceMonitor:

internal/pkg/util/util.go

@@ -84,6 +84,7 @@ func ConfigureReloaderFlags(cmd *cobra.Command) {
 	cmd.PersistentFlags().StringVar(&options.ConfigmapUpdateOnChangeAnnotation, "configmap-annotation", "configmap.reloader.stakater.com/reload", "annotation to detect changes in configmaps, specified by name")
 	cmd.PersistentFlags().StringVar(&options.SecretUpdateOnChangeAnnotation, "secret-annotation", "secret.reloader.stakater.com/reload", "annotation to detect changes in secrets, specified by name")
 	cmd.PersistentFlags().StringVar(&options.ReloaderAutoAnnotation, "auto-annotation", "reloader.stakater.com/auto", "annotation to detect changes in secrets/configmaps")
+	cmd.PersistentFlags().StringVar(&options.IgnoreResourceAnnotation, "ignore-annotation", "reloader.stakater.com/ignore", "annotation to ignore a resource when watching for changes in secrets/configmaps")
 	cmd.PersistentFlags().StringVar(&options.ConfigmapReloaderAutoAnnotation, "configmap-auto-annotation", "configmap.reloader.stakater.com/auto", "annotation to detect changes in configmaps")
 	cmd.PersistentFlags().StringVar(&options.SecretReloaderAutoAnnotation, "secret-auto-annotation", "secret.reloader.stakater.com/auto", "annotation to detect changes in secrets")
 	cmd.PersistentFlags().StringVar(&options.AutoSearchAnnotation, "auto-search-annotation", "reloader.stakater.com/search", "annotation to detect changes in configmaps or secrets tagged with special match annotation")