New module: cnos_rollback (#21788)

* Initial commit for cnos_rollback

* Move roles to integration/roles directory and remove aliases file.

* update module short description

* Change module directory name to Lenovo

* change import cnos statement

lib/ansible/modules/network/lenovo/cnos_rollback.py

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+#!/usr/bin/python
+# -*- coding: utf-8 -*-
+#
+# Copyright (C) 2017 Lenovo, Inc.
+#
+# This file is part of Ansible
+#
+# Ansible is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# Ansible is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with Ansible.  If not, see <http://www.gnu.org/licenses/>.
+#
+# Module to Rollback Config back to Lenovo Switches
+#
+# Lenovo Networking
+#
+
+ANSIBLE_METADATA = {'status': ['preview'],
+                    'supported_by': 'community',
+                    'version': '1.0'}
+
+DOCUMENTATION = '''
+---
+module: cnos_rollback
+short_description: Roll back the running or startup configuration from a remote server on devices running Lenovo CNOS
+description:
+    - This module allows you to work with switch configurations. It provides a way to roll back configurations
+     of a switch from a remote server. This is achieved by using startup or running configurations of the target
+     device that were previously backed up to a remote server using FTP, SFTP, TFTP, or SCP.
+     The first step is to create a directory from where the remote server can be reached. The next step is to
+     provide the full file path of the backup configuration’s location. Authentication details required by the
+     remote server must be provided as well.
+     By default, this method overwrites the switch’s configuration file with the newly downloaded file.
+     This module uses SSH to manage network device configuration.
+     The results of the operation will be placed in a directory named 'results'
+     that must be created by the user in their local directory to where the playbook is run.
+     For more information about this module from Lenovo and customizing it usage for your
+     use cases, please visit our [User Guide](http://systemx.lenovofiles.com/help/index.jsp?topic=%2Fcom.lenovo.switchmgt.ansible.doc%2Fcnos_rollback.html)
+version_added: "2.3"
+extends_documentation_fragment: cnos
+options:
+   configType:
+        description:
+            - This refers to the type of configuration which will be used for the rolling back process.
+             The choices are the running or startup configurations. There is no default value, so it will result
+             in an error if the input is incorrect.
+        required: Yes
+        default: Null
+        choices: [running-config, startup-config]
+   protocol:
+        description:
+            - This refers to the protocol used by the network device to interact with the remote server from where to
+             download the backup configuration. The choices are FTP, SFTP, TFTP, or SCP. Any other protocols will result
+             in error. If this parameter is not specified, there is no default value to be used.
+        required: Yes
+        default: Null
+        choices: [SFTP, SCP, FTP, TFTP]
+   rcserverip:
+        description:
+            - This specifies the IP Address of the remote server from where the backup configuration will be downloaded.
+        required: Yes
+        default: Null
+   rcpath:
+        description:
+            - This specifies the full file path of the configuration file located on the remote server. In case the relative
+             path is used as the variable value, the root folder for the user of the server needs to be specified.
+        required: Yes
+        default: Null
+   serverusername:
+        description:
+            - Specify the username for the server relating to the protocol used.
+        required: Yes
+        default: Null
+   serverpassword:
+        description:
+            - Specify the password for the server relating to the protocol used.
+        required: Yes
+        default: Null
+'''
+EXAMPLES = '''
+Tasks : The following are examples of using the module cnos_rollback. These are written in the main.yml file of the tasks directory.
+---
+
+- name: Test Rollback of config - Running config
+  cnos_rolback:
+      host: "{{ inventory_hostname }}"
+      username: "{{ hostvars[inventory_hostname]['username'] }}"
+      password: "{{ hostvars[inventory_hostname]['password'] }}"
+      deviceType: "{{ hostvars[inventory_hostname]['deviceType'] }}"
+      enablePassword: "{{ hostvars[inventory_hostname]['enablePassword'] }}"
+      outputfile: "./results/test_rollback_{{ inventory_hostname }}_output.txt"
+      configType: running-config
+      protocol: "sftp"
+      serverip: "10.241.106.118"
+      rcpath: "/root/cnos/G8272-running-config.txt"
+      serverusername: "root"
+      serverpassword: "root123"
+
+- name: Test Rollback of config - Startup config
+  cnos_rolback:
+      host: "{{ inventory_hostname }}"
+      username: "{{ hostvars[inventory_hostname]['username'] }}"
+      password: "{{ hostvars[inventory_hostname]['password'] }}"
+      deviceType: "{{ hostvars[inventory_hostname]['deviceType'] }}"
+      enablePassword: "{{ hostvars[inventory_hostname]['enablePassword'] }}"
+      outputfile: "./results/test_rollback_{{ inventory_hostname }}_output.txt"
+      configType: startup-config
+      protocol: "sftp"
+      serverip: "10.241.106.118"
+      rcpath: "/root/cnos/G8272-startup-config.txt"
+      serverusername: "root"
+      serverpassword: "root123"
+
+- name: Test Rollback of config - Running config - TFTP
+  cnos_rolback:
+      host: "{{ inventory_hostname }}"
+      username: "{{ hostvars[inventory_hostname]['username'] }}"
+      password: "{{ hostvars[inventory_hostname]['password'] }}"
+      deviceType: "{{ hostvars[inventory_hostname]['deviceType'] }}"
+      enablePassword: "{{ hostvars[inventory_hostname]['enablePassword'] }}"
+      outputfile: "./results/test_rollback_{{ inventory_hostname }}_output.txt"
+      configType: running-config
+      protocol: "tftp"
+      serverip: "10.241.106.118"
+      rcpath: "/anil/G8272-running-config.txt"
+      serverusername: "root"
+      serverpassword: "root123"
+
+- name: Test Rollback of config - Startup config - TFTP
+  cnos_rolback:
+      host: "{{ inventory_hostname }}"
+      username: "{{ hostvars[inventory_hostname]['username'] }}"
+      password: "{{ hostvars[inventory_hostname]['password'] }}"
+      deviceType: "{{ hostvars[inventory_hostname]['deviceType'] }}"
+      enablePassword: "{{ hostvars[inventory_hostname]['enablePassword'] }}"
+      outputfile: "./results/test_rollback_{{ inventory_hostname }}_output.txt"
+      configType: startup-config
+      protocol: "tftp"
+      serverip: "10.241.106.118"
+      rcpath: "/anil/G8272-startup-config.txt"
+      serverusername: "root"
+      serverpassword: "root123"
+
+'''
+RETURN = '''
+  return value: |
+    On successful execution, the method returns a message in JSON format
+    [Config file tranferred to Device]
+    Upon any failure, the method returns an error display string.
+'''
+import sys
+import paramiko
+import time
+import argparse
+import socket
+import array
+import json
+import time
+import re
+try:
+    from ansible.module_utils import cnos
+    HAS_LIB = True
+except:
+    HAS_LIB = False
+from ansible.module_utils.basic import AnsibleModule
+from collections import defaultdict
+
+
+def main():
+    module = AnsibleModule(
+        argument_spec=dict(
+            outputfile=dict(required=True),
+            host=dict(required=True),
+            username=dict(required=True),
+            password=dict(required=True, no_log=True),
+            enablePassword=dict(required=False, no_log=True),
+            deviceType=dict(required=True),
+            configType=dict(required=True),
+            protocol=dict(required=True),
+            serverip=dict(required=True),
+            rcpath=dict(required=True),
+            serverusername=dict(required=False),
+            serverpassword=dict(required=False, no_log=True),),
+        supports_check_mode=False)
+
+    username = module.params['username']
+    password = module.params['password']
+    enablePassword = module.params['enablePassword']
+    outputfile = module.params['outputfile']
+    host = module.params['host']
+    deviceType = module.params['deviceType']
+    configType = module.params['configType']
+    protocol = module.params['protocol'].lower()
+    rcserverip = module.params['serverip']
+    rcpath = module.params['rcpath']
+    serveruser = module.params['serverusername']
+    serverpwd = module.params['serverpassword']
+    output = ""
+    timeout = 90
+    tftptimeout = 450
+
+    # Create instance of SSHClient object
+    remote_conn_pre = paramiko.SSHClient()
+
+    # Automatically add untrusted hosts (make sure okay for security policy in your environment)
+    remote_conn_pre.set_missing_host_key_policy(paramiko.AutoAddPolicy())
+
+    # initiate SSH connection with the switch
+    remote_conn_pre.connect(host, username=username, password=password)
+    time.sleep(2)
+
+    # Use invoke_shell to establish an 'interactive session'
+    remote_conn = remote_conn_pre.invoke_shell()
+    time.sleep(2)
+
+    # Enable and enter configure terminal then send command
+    output = output + cnos.waitForDeviceResponse("\n", ">", 2, remote_conn)
+
+    output = output + cnos.enterEnableModeForDevice(enablePassword, 3, remote_conn)
+
+    # Make terminal length = 0
+    output = output + cnos.waitForDeviceResponse("terminal length 0\n", "#", 2, remote_conn)
+
+    # Invoke method for Config transfer from server
+    if(configType == 'running-config'):
+        if(protocol == "tftp" or protocol == "ftp"):
+            transfer_status = cnos.doRunningConfigRollback(protocol, tftptimeout, rcserverip, rcpath, serveruser, serverpwd, remote_conn)
+        elif(protocol == "sftp" or protocol == "scp"):
+            transfer_status = cnos.doSecureRunningConfigRollback(protocol, timeout, rcserverip, rcpath, serveruser, serverpwd, remote_conn)
+        else:
+            transfer_status = "Invalid Protocol option"
+    elif(configType == 'startup-config'):
+        if(protocol == "tftp" or protocol == "ftp"):
+            transfer_status = cnos.doStartUpConfigRollback(protocol, tftptimeout, rcserverip, rcpath, serveruser, serverpwd, remote_conn)
+        elif(protocol == "sftp" or protocol == "scp"):
+            transfer_status = cnos.doSecureStartUpConfigRollback(protocol, timeout, rcserverip, rcpath, serveruser, serverpwd, remote_conn)
+        else:
+            transfer_status = "Invalid Protocol option"
+    else:
+        transfer_status = "Invalid configType Option"
+
+    output = output + "\n Config Transfer status \n" + transfer_status
+
+    # Save it into the file
+    file = open(outputfile, "a")
+    file.write(output)
+    file.close()
+
+    # need to add logic to check when changes occur or not
+    errorMsg = cnos.checkOutputForError(output)
+    if(errorMsg is None):
+        module.exit_json(changed=True, msg="Config file tranferred to Device")
+    else:
+        module.fail_json(msg=errorMsg)
+
+if __name__ == '__main__':
+        main()

test/integration/roles/cnos_rollback/README.md

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+# Ansible Role: cnos_rollback_sample - Rolls back the configuration of a switch from a remote server
+---
+<add role description below>
+
+This role is an example of using the *cnos_rollback.py* Lenovo module in the context of CNOS switch configuration.This module allows you to work with switch configurations. It provides a way to roll back configurations of a switch from a remote server. This is achieved by using startup or running configurations of the target device that were previously backed up to a remote server using FTP, SFTP, TFTP, or SCP.
+
+The first step is to create a directory from where the remote server can be reached. The next step is to provide the full file path of the backup configuration’s location. Authentication details required by the remote server must be provided as well.
+
+By default, this method overwrites the switch’s configuration file with the newly downloaded file.
+
+The results of the operation can be viewed in *results* directory.
+
+For more details, see [Lenovo modules for Ansible: cnos_rollback](http://systemx.lenovofiles.com/help/index.jsp?topic=%2Fcom.lenovo.switchmgt.ansible.doc%2Fcnos_rollback.html&cp=0_3_1_0_4_5).
+
+
+## Requirements
+---
+<add role requirements information below>
+
+- Ansible version 2.2 or later ([Ansible installation documentation](http://docs.ansible.com/ansible/intro_installation.html))
+- Lenovo switches running CNOS version 10.2.1.0 or later
+- an SSH connection to the Lenovo switch (SSH must be enabled on the network device)
+
+
+## Role Variables
+---
+<add role variables information below>
+
+Available variables are listed below, along with description.
+
+The following are mandatory inventory variables:
+
+Variable | Description
+--- | ---
+`username` | Specifies the username used to log into the switch
+`password` | Specifies the password used to log into the switch
+`enablePassword` | Configures the password used to enter Global Configuration command mode on the switch (this is an optional parameter)
+`hostname` | Searches the hosts file at */etc/ansible/hosts* and identifies the IP address of the switch on which the role is going to be applied
+`deviceType` | Specifies the type of device from where the configuration will be backed up (**g8272_cnos** - G8272, **g8296_cnos** - G8296)
+
+The values of the variables used need to be modified to fit the specific scenario in which you are deploying the solution. To change the values of the variables, you need to visits the *vars* directory of each role and edit the *main.yml* file located there. The values stored in this file will be used by Ansible when the template is executed.
+
+The syntax of *main.yml* file for variables is the following:
+
+```
+<template variable>:<value>
+```
+
+You will need to replace the `<value>` field with the value that suits your topology. The `<template variable>` fields are taken from the template and it is recommended that you leave them unchanged.
+
+Variable | Description
+--- | ---
+`configType` | Specifies the type of configuration which will be used for the rolling back process (**running-config** - running configuration, **startup-config** - startup configuration)
+`protocol` | Specifies the protocol used by the network device to interact with the remote server from where to download the backup configuration (**ftp** - FTP, **sftp** - SFTP, **tftp** - TFTP, **scp** - SCP)
+`serverip` | Specifies the IP Address of the remote server from where the backup configuration will be downloaded
+`rcpath` | Specifies the full file path where the configuration file located on the remote server (in case the relative path is used as the variable value, the root folder for the user of the server needs to be specified)
+`serverusername` | Configures the username for the server relating to the protocol used
+`serverpassword` | Configures the password for the server relating to the protocol used
+
+
+## Dependencies
+---
+<add dependencies information below>
+
+- username.iptables - Configures the firewall and blocks all ports except those needed for web server and SSH access.
+- username.common - Performs common server configuration.
+- cnos_rollback.py - This modules needs to be present in the *library* directory of the role.
+- cnos.py - This module needs to be present in the PYTHONPATH environment variable set in the Ansible system.
+- /etc/ansible/hosts - You must edit the */etc/ansible/hosts* file with the device information of the switches designated as leaf switches. You may refer to *cnos_rollback_sample_hosts* for a sample configuration.
+
+Ansible keeps track of all network elements that it manages through a hosts file. Before the execution of a playbook, the hosts file must be set up.
+
+Open the */etc/ansible/hosts* file with root privileges. Most of the file is commented out by using **#**. You can also comment out the entries you will be adding by using **#**. You need to copy the content of the hosts file for the role into the */etc/ansible/hosts* file. The sample hosts file for the role is located in the main directory.
+
+```
+[cnos_rollback_sample]
+10.241.107.39   username=<username> password=<password> deviceType=g8272_cnos
+10.241.107.40   username=<username> password=<password> deviceType=g8272_cnos
+```
+    
+**Note:** You need to change the IP addresses to fit your specific topology. You also need to change the `<username>` and `<password>` to the appropriate values used to log into the specific Lenovo network devices.
+ 
+
+## Example Playbook
+---
+<add playbook samples below>
+
+To execute an Ansible playbook, use the following command:
+
+```
+ansible-playbook cnos_rollback_sample.yml -vvv
+```
+
+`-vvv` is an optional verbos command that helps identify what is happening during playbook execution. The playbook for each role is located in the main directory of the solution.
+
+```
+ - name: Module to do rollback of configurations
+   hosts: cnos_rollback_sample
+   gather_facts: no
+   connection: local
+   roles:
+    - cnos_rollback_sample
+```
+
+
+## License
+---
+<add license information below>
+Copyright (C) 2017 Lenovo, Inc.
+
+This file is part of Ansible
+
+Ansible is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
+
+Ansible is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License along with Ansible.  If not, see <http://www.gnu.org/licenses/>.

test/integration/roles/cnos_rollback/cnos_rollback_sample_hosts

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+# You have to paste this dummy information  in /etc/ansible/hosts
+#    Notes:
+#    - Comments begin with the '#' character
+#    - Blank lines are ignored
+#    - Groups of hosts are delimited by [header] elements
+#    - You can enter hostnames or ip addresses
+#    - A hostname/ip can be a member of multiple groups
+#
+# In the /etc/ansible/hosts file u have to enter [cnos_rollback_sample] tag
+# Following you should specify IP Adresses details 
+# Please change <username> and <password> with appropriate value for your switch.
+
+[cnos_rollback_sample]
+10.241.107.39  username=<username> password=<password> deviceType=g8272_cnos rcpath=/root/cnos_config/G8272-running-config.txt
+
+#Use this in case its TFTP as tftpboot folder is the starting point for tftp
+#10.241.107.39  username=<username> password=<password> deviceType=g8272_cnos rcpath=/anil/G8272-running-config.txt
+

test/integration/roles/cnos_rollback/tasks/main.yml

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+# This contain sample config Roll Back execution tasks
+---
+
+- name: Test Rollback of config - Running config
+  cnos_rollback: host={{ inventory_hostname }} username={{ hostvars[inventory_hostname]['username']}}  password={{ hostvars[inventory_hostname]['password']}} deviceType={{ hostvars[inventory_hostname]['deviceType']}} outputfile=./results/cnos_rollback_{{ inventory_hostname }}_output.txt configType='{{item.configType}}' protocol='{{item.protocol}}' serverip='{{item.serverip}}' rcpath={{ hostvars[inventory_hostname]['rcpath']}} serverusername='{{item.serverusername}}' serverpassword='{{item.serverpassword}}'
+  with_items: "{{test_rollback_data1}}"
+  
+- name: Test Rollback of config - Startup config
+  cnos_rollback: host={{ inventory_hostname }} username={{ hostvars[inventory_hostname]['username']}}  password={{ hostvars[inventory_hostname]['password']}} deviceType={{ hostvars[inventory_hostname]['deviceType']}} outputfile=./results/cnos_rollback_{{ inventory_hostname }}_output.txt configType='{{item.configType}}' protocol='{{item.protocol}}' serverip='{{item.serverip}}' rcpath={{ hostvars[inventory_hostname]['rcpath']}} serverusername='{{item.serverusername}}' serverpassword='{{item.serverpassword}}'
+  with_items: "{{test_rollback_data2}}"
+ 
+#Root folder will be different for SFTP/SCP and TFTP
+#The following task is commented. 
+#Before trying this, please change in /etc/ansible/hosts file 
+#and place an config file with reference to your tftp-root folder 
+
+#- name: Test Rollback of config - Running config - TFTP
+#  cnos_rollback: host={{ inventory_hostname }} username={{ hostvars[inventory_hostname]['username']}}  password={{ hostvars[inventory_hostname]['password']}} deviceType={{ hostvars[inventory_hostname]['deviceType']}} outputfile=./results/cnos_rollback_{{ inventory_hostname }}_output.txt configType='{{item.configType}}' protocol='{{item.protocol}}' serverip='{{item.serverip}}' rcpath={{ hostvars[inventory_hostname]['rcpath']}}
+#  with_items: "{{test_rollback_data3}}"
+  
+#- name: Test Rollback of config - Startup config - TFTP
+#  cnos_rollback: host={{ inventory_hostname }} username={{ hostvars[inventory_hostname]['username']}}  password={{ hostvars[inventory_hostname]['password']}} deviceType={{ hostvars[inventory_hostname]['deviceType']}} outputfile=./results/cnos_rollback_{{ inventory_hostname }}_output.txt configType='{{item.configType}}' protocol='{{item.protocol}}' serverip='{{item.serverip}}' rcpath={{ hostvars[inventory_hostname]['rcpath']}} 
+#  with_items: "{{test_rollback_data4}}"
+
+# Completed file

test/integration/roles/cnos_rollback/vars/main.yml

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+---
+test_rollback_data1:
+  - {configType: running-config, protocol: "sftp", serverip: "10.241.106.118", serverusername: "root", serverpassword: "root123"}
+
+test_rollback_data2:
+  - {configType: startup-config, protocol: "sftp", serverip: "10.241.106.118", serverusername: "root", serverpassword: "root123"}
+
+test_rollback_data3:
+  - {configType: running-config, protocol: "tftp", serverip: "10.241.106.118"}
+  
+test_rollback_data4:
+  - {configType: startup-config, protocol: "tftp", serverip: "10.241.106.118"}