feat: use showMultiCluster instead of cluster label

Author: lorenzofelletti

alerts/kube_apiserver.libsonnet

@@ -61,7 +61,7 @@ local utils = import '../lib/utils.libsonnet';
             annotations: {
               description: 'A client certificate used to authenticate to kubernetes apiserver is expiring in less than %s%s.' % [
                 (utils.humanizeSeconds($._config.certExpirationWarningSeconds)),
-                utils.ifClusterLabelSet($._config, ' on cluster {{ $labels.%(clusterLabel)s }}' % $._config),
+                utils.ifShowMultiCluster($._config, ' on cluster {{ $labels.%(clusterLabel)s }}' % $._config),
               ],
               summary: 'Client certificate is about to expire.',
             },
@@ -80,7 +80,7 @@ local utils = import '../lib/utils.libsonnet';
             annotations: {
               description: 'A client certificate used to authenticate to kubernetes apiserver is expiring in less than %s%s.' % [
                 (utils.humanizeSeconds($._config.certExpirationCriticalSeconds)),
-                utils.ifClusterLabelSet($._config, ' on cluster {{ $labels.%(clusterLabel)s }}' % $._config),
+                utils.ifShowMultiCluster($._config, ' on cluster {{ $labels.%(clusterLabel)s }}' % $._config),
               ],
               summary: 'Client certificate is about to expire.',
             },

lib/utils.libsonnet

@@ -57,7 +57,7 @@
         },
       },
 
-  // if clusterLabel is set, return the string, otherwise return an empty string
-  ifClusterLabelSet(config, string)::
-    if std.length(config.clusterLabel) > 0 then string else '',
+  // if showMultiCluster is true in config, return the string, otherwise return an empty string
+  ifShowMultiCluster(config, string)::
+    if config.showMultiCluster then string else '',
 }