[stable/sysdig] Add a hack to implement watches on Helm based Operator (#21822)

This implementation in operators breaks the pattern in some Helm based
operators about using an splitted image description:

https://github.com/helm/charts/blob/master/stable/postgresql/values.yaml#L15
https://github.com/helm/charts/blob/master/stable/prometheus/values.yaml#L534
https://github.com/helm/charts/blob/master/stable/redis/values.yaml#L15
https://github.com/helm/charts/blob/master/stable/wordpress/values.yaml#L14

But is required to certify the operator.

https://github.com/operator-framework/operator-sdk/blob/master/doc/helm/user-guide.md#passing-environment-variables-to-the-helm-chart

Signed-off-by: Néstor Salceda <nestor.salceda@sysdig.com>

stable/sysdig/CHANGELOG.md

@@ -3,6 +3,13 @@
 This file documents all notable changes to Sysdig Helm Chart. The release
 numbering uses [semantic versioning](http://semver.org).
 
+## v1.7.8
+
+### Minor changes
+
+* Add a image.overrideValue value which is a hack to support
+  RELATED_IMAGE_<identifier> feature in Helm based operators.
+
 ## v1.7.7
 
 ### Minor changes

stable/sysdig/Chart.yaml

@@ -1,6 +1,6 @@
 apiVersion: v1
 name: sysdig
-version: 1.7.7
+version: 1.7.8
 appVersion: 9.8.0
 description: Sysdig Monitor and Secure agent
 keywords:

stable/sysdig/templates/_helpers.tpl

@@ -54,17 +54,21 @@ Helm 2.11 supports the assignment of a value to a variable defined in a differen
 but Helm 2.9 and 2.10 doesn't support it, so we need to implement this if-else logic.
 Also, we can't use a single if because lazy evaluation is not an option
 */}}
-{{- if .Values.slim.enabled }}
-{{- $repositoryName = printf "%s-%s" .Values.image.repository "slim" -}}
-{{- end -}}
-{{- if .Values.global }}
-    {{- if .Values.global.imageRegistry }}
-        {{- printf "%s/%s:%s" .Values.global.imageRegistry $repositoryName $tag -}}
+{{- if .Values.image.overrideValue }}
+    {{- printf .Values.image.overrideValue -}}
+{{- else -}}
+    {{- if .Values.slim.enabled }}
+    {{- $repositoryName = printf "%s-%s" .Values.image.repository "slim" -}}
+    {{- end -}}
+    {{- if .Values.global }}
+        {{- if .Values.global.imageRegistry }}
+            {{- printf "%s/%s:%s" .Values.global.imageRegistry $repositoryName $tag -}}
+        {{- else -}}
+            {{- printf "%s/%s:%s" $registryName $repositoryName $tag -}}
+        {{- end -}}
     {{- else -}}
         {{- printf "%s/%s:%s" $registryName $repositoryName $tag -}}
     {{- end -}}
-{{- else -}}
-    {{- printf "%s/%s:%s" $registryName $repositoryName $tag -}}
 {{- end -}}
 {{- end -}}
 

stable/sysdig/values.yaml

@@ -1,6 +1,12 @@
 # Default values for Sysdig Monitor and Secure Helm package.
 
 image:
+  # This is a hack to support RELATED_IMAGE_<identifier> feature in Helm based
+  # Operators
+  #
+  # As long as I don't want to people to use this, I will keep it undocumented
+  overrideValue:
+
   registry: docker.io
   repository: sysdig/agent
   tag: 9.8.0