Remove unnecessary configuration in Queue Processor mode (#745)

* Remove unnecessary configuration in Queue P
rocessor mode

* Address review comments

Author: johngmyers

config/helm/aws-node-termination-handler/README.md

@@ -152,10 +152,10 @@ The configuration in this table applies to AWS Node Termination Handler in IMDS
 | `windowsTolerations`             | Override `daemonsetTolerations` for the Linux DaemonSet.                                                                                                                                                                                                      | `[]`                   |
 | `enableProbesServer`             | If `true`, start an http server exposing `/healthz` endpoint for probes.                                                                                                                                                                                      | `false`                |
 | `metadataTries`                  | The number of times to try requesting metadata.                                                                                                                                                                                                               | `3`                    |
-| `enableSpotInterruptionDraining` | If `true`, drain nodes when the spot interruption termination notice is received.                                                                                                                                                                             | `true`                 |
-| `enableScheduledEventDraining`   | If `true`, drain nodes before the maintenance window starts for an EC2 instance scheduled event.                                                                                                                                                              | `true`                 |
-| `enableRebalanceMonitoring`      | If `true`, cordon nodes when the rebalance recommendation notice is received. If you'd like to drain the node in addition to cordoning, then also set `enableRebalanceDraining`.                                                                              | `false`                |
-| `enableRebalanceDraining`        | If `true`, drain nodes when the rebalance recommendation notice is received.                                                                                                                                                                                  | `false`                |
+| `enableSpotInterruptionDraining` | If `true`, drain nodes when the spot interruption termination notice is received. Only used in IMDS mode.                                                                                                                                                     | `true`                 |
+| `enableScheduledEventDraining`   | If `true`, drain nodes before the maintenance window starts for an EC2 instance scheduled event. Only used in IMDS mode.                                                                                                                                      | `true`                 |
+| `enableRebalanceMonitoring`      | If `true`, cordon nodes when the rebalance recommendation notice is received. If you'd like to drain the node in addition to cordoning, then also set `enableRebalanceDraining`. Only used in IMDS mode.                                                      | `false`                |
+| `enableRebalanceDraining`        | If `true`, drain nodes when the rebalance recommendation notice is received. Only used in IMDS mode.                                                                                                                                                          | `false`                |
 
 ### Testing Configuration
 

config/helm/aws-node-termination-handler/templates/deployment.yaml

@@ -146,14 +146,6 @@ spec:
             - name: WEBHOOK_TEMPLATE
               value: {{ .Values.webhookTemplate | quote }}
             {{- end }}
-            - name: ENABLE_SPOT_INTERRUPTION_DRAINING
-              value: {{ .Values.enableSpotInterruptionDraining | quote }}
-            - name: ENABLE_SCHEDULED_EVENT_DRAINING
-              value: {{ .Values.enableScheduledEventDraining | quote }}
-            - name: ENABLE_REBALANCE_MONITORING
-              value: {{ .Values.enableRebalanceMonitoring | quote }}
-            - name: ENABLE_REBALANCE_DRAINING
-              value: {{ .Values.enableRebalanceDraining | quote }}
             - name: ENABLE_SQS_TERMINATION_DRAINING
               value: "true"
             {{- with .Values.awsRegion }}

config/helm/aws-node-termination-handler/values.yaml

@@ -259,22 +259,22 @@ daemonsetTolerations:
 linuxTolerations: []
 windowsTolerations: []
 
-# If the probes server is running for the Daemonset
+# If the probes server is running.
 enableProbesServer: false
 
 # Total number of times to try making the metadata request before failing.
 metadataTries: 3
 
-# enableSpotInterruptionDraining If false, do not drain nodes when the spot interruption termination notice is received
+# enableSpotInterruptionDraining If false, do not drain nodes when the spot interruption termination notice is received. Only used in IMDS mode.
 enableSpotInterruptionDraining: true
 
-# enableScheduledEventDraining If false, do not drain nodes before the maintenance window starts for an EC2 instance scheduled event
+# enableScheduledEventDraining If false, do not drain nodes before the maintenance window starts for an EC2 instance scheduled event. Only used in IMDS mode.
 enableScheduledEventDraining: true
 
-# enableRebalanceMonitoring If true, cordon nodes when the rebalance recommendation notice is received
+# enableRebalanceMonitoring If true, cordon nodes when the rebalance recommendation notice is received. Only used in IMDS mode.
 enableRebalanceMonitoring: false
 
-# enableRebalanceDraining If true, drain nodes when the rebalance recommendation notice is received
+# enableRebalanceDraining If true, drain nodes when the rebalance recommendation notice is received. Only used in IMDS mode.
 enableRebalanceDraining: false
 
 # ---------------------------------------------------------------------------------------------------------------------