Add prerequisite roles for Cloudera on premise (private cloud)

roles/prereq_accumulo/README.md

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+# prereq_accumulo
+
+Set up for Accumulo
+
+This role prepares a host for Accumulo usage by creating a dedicated system user and group named `accumulo`. This user is essential for running Accumulo processes with appropriate permissions and isolation.
+
+The role will:
+- Create the `accumulo` system user and group.
+- Configure home directories and other necessary local paths for the `accumulo` user, if required.
+- Ensure appropriate permissions are set for files and directories related to Accumulo.
+
+# Requirements
+
+- Root or `sudo` privileges are required on the target host to create system users and groups.
+
+# Dependencies
+
+None.
+
+# Parameters
+
+| Variable | Type | Required | Default | Description |
+| --- | --- | --- | --- | --- |
+| | | | | This role has no configurable parameters. |
+
+# Example Playbook
+
+```yaml
+- hosts: accumulo_nodes
+  tasks:
+    - name: Set up the accumulo user and environment
+      ansible.builtin.import_role:
+        name: cloudera.exe.prereq_accumulo
+
+```
+Copyright 2024 Cloudera, Inc.
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+     https://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+```

roles/prereq_accumulo/meta/argument_specs.yml

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+---
+# Copyright 2024 Cloudera, Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+argument_specs:
+  main:
+    short_description: Set up user accounts for Accumulo
+    description:
+      - Set up for Apache Accumulo usage, notably, create the local C(accumulo) user.
+    author: Cloudera Labs
+    version_added: "5.0.0"
+    options: {}

roles/prereq_accumulo/molecule/default/converge.yml

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+---
+# Copyright 2024 Cloudera, Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+- name: Converge
+  hosts: all
+  gather_facts: false
+  become: true
+  tasks:
+    - name: Set up for Accumulo
+      ansible.builtin.import_role:
+        name: prereq_accumulo