docs: Remove outdated selectors on rolegroups (#453)

Author: sbernauer

modules/concepts/pages/roles-and-role-groups.adoc

@@ -49,19 +49,16 @@ spec:
     roleGroups:
       default:
         replicas: 3
-        selector:
-          matchLabels:
-            kubernetes.io/os: linux  # <2>
   dataNodes:
     config:
       resources:
         storage:
           data:
-            capacity: 1Gi  # <3>
+            capacity: 1Gi  # <2>
     roleGroups:
       default:
         replicas: 2
-      hiCapacity:  # <4>
+      hiCapacity:  # <3>
         config:
           resources:
             storage:
@@ -71,9 +68,8 @@ spec:
 ----
 
 <1> The JournalNode role with only a single default role group. For the role group 3 replicas are specified, specifying a replica count is optional, the default is 1.
-<2> For the NameNodes default role group, a label selector is given, the pods should only be specified on nodes where the `kubernetes.io/os` label has the value `linux`.
-<3> A common config setting for the DataNodes role. This configuration setting applies only to pods for this role.
-<4> The DataNode role has two role groups, the default group and the hiCapacity group. In it the config setting for the group is overridden with a higher value of 2Gi. This role group has only one replica.
+<2> A common config setting for the DataNodes role. This configuration setting applies only to pods for this role.
+<3> The DataNode role has two role groups, the default group and the hiCapacity group. In it the config setting for the group is overridden with a higher value of 2Gi. This role group has only one replica.
 
 == Further Reading
 

modules/tutorials/pages/end-to-end_data_pipeline_example.adoc

@@ -121,9 +121,6 @@ spec:
   servers:
     roleGroups:
       default:
-        selector:
-          matchLabels:
-            kubernetes.io/os: linux
         replicas: 1
         config: {}
 EOF
@@ -218,9 +215,6 @@ spec:
             capacity: "20Gi"
     roleGroups:
       default:
-        selector:
-          matchLabels:
-            kubernetes.io/os: linux
         config:
           log:
             rootLogLevel: INFO
@@ -448,9 +442,6 @@ spec:
         druid.s3.enablePathStyleAccess: "true"
     roleGroups:
       default:
-        selector:
-          matchLabels:
-            kubernetes.io/os: linux
         config: {}
         replicas: 1
   coordinators:
@@ -459,9 +450,6 @@ spec:
         druid.s3.enablePathStyleAccess: "true"
     roleGroups:
       default:
-        selector:
-          matchLabels:
-            kubernetes.io/os: linux
         config: {}
         replicas: 1
   historicals:
@@ -470,9 +458,6 @@ spec:
         druid.s3.enablePathStyleAccess: "true"
     roleGroups:
       default:
-        selector:
-          matchLabels:
-            kubernetes.io/os: linux
         config: {}
         replicas: 1
   middleManagers:
@@ -481,9 +466,6 @@ spec:
         druid.s3.enablePathStyleAccess: "true"
     roleGroups:
       default:
-        selector:
-          matchLabels:
-            kubernetes.io/os: linux
         config: {}
         replicas: 1
   routers:
@@ -492,9 +474,6 @@ spec:
         druid.s3.enablePathStyleAccess: "true"
     roleGroups:
       default:
-        selector:
-          matchLabels:
-            kubernetes.io/os: linux
         config: {}
         replicas: 1
 EOF