fix alertmanagers casing (one word) (#5377)

fixes #5371

Signed-off-by: naseemkullah <naseem@transit.app>

cli/cmd/testdata/install_prometheus_overwrite.golden

@@ -697,7 +697,7 @@ data:
           values:
           - disabled
     prometheus:
-      alertManagers:
+      alertmanagers:
       - scheme: http
         static_configs:
         - targets:

cli/cmd/testdata/prom-config.yaml

@@ -18,7 +18,7 @@ prometheus:
     relabel_configs:
     - action: labelmap
       regex: __meta_kubernetes_node_label_(.+)
-  alertManagers:
+  alertmanagers:
   - scheme: http
     static_configs:
     - targets:

viz/charts/linkerd-viz/README.md

@@ -106,8 +106,8 @@ Kubernetes: `>=1.13.0-0`
 | linkerdVersion | string | `"linkerdVersionValue"` | control plane version. See Proxy section for proxy version |
 | namespace | string | `"linkerd-viz"` | Namespace in which the Linkerd Viz extension has to be installed |
 | nodeSelector | object | `{"beta.kubernetes.io/os":"linux"}` | NodeSelector section, See the [K8S documentation](https://kubernetes.io/docs/concepts/configuration/assign-pod-node/#nodeselector) for more information |
-| prometheus.alertManagers | string | `nil` | Alertmanager instances the Prometheus server sends alerts to configured via the static_configs parameter. |
 | prometheus.alertRelabelConfigs | string | `nil` | Alert relabeling is applied to alerts before they are sent to the Alertmanager. |
+| prometheus.alertmanagers | string | `nil` | Alertmanager instances the Prometheus server sends alerts to configured via the static_configs parameter. |
 | prometheus.args | object | `{"config.file":"/etc/prometheus/prometheus.yml","log.level":"info","storage.tsdb.path":"/data","storage.tsdb.retention.time":"6h"}` | Command line options for Prometheus binary |
 | prometheus.enabled | bool | `true` | toggle field to enable or disable prometheus |
 | prometheus.globalConfig | object | `{"evaluation_interval":"10s","scrape_interval":"10s","scrape_timeout":"10s"}` | The global configuration specifies parameters that are valid in all other configuration contexts. |

viz/charts/linkerd-viz/templates/prometheus.yaml

@@ -154,15 +154,15 @@ data:
     {{- toYaml .Values.prometheus.scrapeConfigs | trim | nindent 4 }}
     {{- end }}
 
-    {{-  if (or .Values.prometheus.alertManagers .Values.prometheus.alertRelabelConfigs) }}
+    {{-  if (or .Values.prometheus.alertmanagers .Values.prometheus.alertRelabelConfigs) }}
     alerting:
       alert_relabel_configs:
         {{- if .Values.prometheus.alertRelabelConfigs }}
         {{- toYaml .Values.prometheus.alertRelabelConfigs | trim | nindent 6 }}
         {{- end }}
       alertmanagers:
-        {{- if .Values.prometheus.alertManagers }}
-        {{- toYaml .Values.prometheus.alertManagers | trim | nindent 6 }}
+        {{- if .Values.prometheus.alertmanagers }}
+        {{- toYaml .Values.prometheus.alertmanagers | trim | nindent 6 }}
         {{- end }}
     {{- end }}
 

viz/charts/linkerd-viz/values.yaml

@@ -264,7 +264,7 @@ prometheus:
 
   # -- Alertmanager instances the Prometheus server sends alerts to configured via
   # the static_configs parameter.
-  alertManagers:
+  alertmanagers:
   # Ex:
   # - scheme: http
   #   static_configs: