pn_cluster (New Module) (#4727)
* made changes to make it 2.4 compatible * added no_log for password * incorporated additional review comments * remove type for options block
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amitsi
Matt Clay
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31b3fbf3ba
1 changed files with 312 additions and 0 deletions
312
lib/ansible/modules/network/netvisor/pn_cluster.py
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lib/ansible/modules/network/netvisor/pn_cluster.py
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#!/usr/bin/python
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""" PN CLI cluster-create/cluster-delete """
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#
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# This file is part of Ansible
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#
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# Ansible is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# Ansible is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with Ansible. If not, see <http://www.gnu.org/licenses/>.
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#
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import shlex
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DOCUMENTATION = """
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---
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module: pn_cluster
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author: "Pluribus Networks (@amitsi)"
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version_added: "2.2"
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version: 1.0
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short_description: CLI command to create/delete a cluster.
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description:
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- Execute cluster-create or cluster-delete command.
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- A cluster allows two switches to cooperate in high-availability (HA)
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deployments. The nodes that form the cluster must be members of the same
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fabric. Clusters are typically used in conjunction with a virtual link
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aggregation group (VLAG) that allows links physically connected to two
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separate switches appear as a single trunk to a third device. The third
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device can be a switch,server, or any Ethernet device.
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options:
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pn_cliusername:
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description:
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- Provide login username if user is not root.
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required: False
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pn_clipassword:
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description:
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- Provide login password if user is not root.
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required: False
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pn_cliswitch:
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description:
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- Target switch to run the cli on.
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required: False
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state:
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description:
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- Specify action to perform. Use 'present' to create cluster and 'absent'
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to delete cluster.
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required: true
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choices: ['present', 'absent']
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pn_name:
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description:
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- Specify the name of the cluster.
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required: true
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pn_cluster_node1:
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description:
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- Specify the name of the first switch in the cluster.
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- Required for 'cluster-create'.
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pn_cluster_node2:
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description:
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- Specify the name of the second switch in the cluster.
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- Required for 'cluster-create'.
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pn_validate:
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description:
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- Validate the inter-switch links and state of switches in the cluster.
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choices: ['validate', 'no-validate']
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"""
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EXAMPLES = """
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- name: create spine cluster
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pn_cluster:
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state: 'present'
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pn_name: 'spine-cluster'
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pn_cluster_node1: 'spine01'
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pn_cluster_node2: 'spine02'
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pn_validate: validate
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pn_quiet: True
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- name: delete spine cluster
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pn_cluster:
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state: 'absent'
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pn_name: 'spine-cluster'
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pn_quiet: True
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"""
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RETURN = """
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command:
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description: The CLI command run on the target node(s).
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stdout:
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description: The set of responses from the cluster command.
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returned: always
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type: list
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stderr:
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description: The set of error responses from the cluster command.
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returned: on error
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type: list
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changed:
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description: Indicates whether the CLI caused changes on the target.
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returned: always
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type: bool
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"""
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NAME_EXISTS = None
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NODE1_EXISTS = None
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NODE2_EXISTS = None
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def pn_cli(module):
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"""
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This method is to generate the cli portion to launch the Netvisor cli.
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It parses the username, password, switch parameters from module.
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:param module: The Ansible module to fetch username, password and switch
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:return: returns the cli string for further processing
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"""
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username = module.params['pn_cliusername']
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password = module.params['pn_clipassword']
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cliswitch = module.params['pn_cliswitch']
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if username and password:
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cli = '/usr/bin/cli --quiet --user %s:%s ' % (username, password)
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else:
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cli = '/usr/bin/cli --quiet '
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if cliswitch == 'local':
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cli += ' switch-local '
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else:
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cli += ' switch ' + cliswitch
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return cli
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def check_cli(module, cli):
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"""
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This method checks for idempotency using the cluster-show command.
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If a cluster with given name exists, return NAME_EXISTS as True else False.
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If the given cluster-node-1 is already a part of another cluster, return
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NODE1_EXISTS as True else False.
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If the given cluster-node-2 is already a part of another cluster, return
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NODE2_EXISTS as True else False.
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:param module: The Ansible module to fetch input parameters
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:param cli: The CLI string
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:return Global Booleans: NAME_EXISTS, NODE1_EXISTS, NODE2_EXISTS
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"""
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name = module.params['pn_name']
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node1 = module.params['pn_cluster_node1']
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node2 = module.params['pn_cluster_node2']
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show = cli + ' cluster-show format name,cluster-node-1,cluster-node-2 '
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show = shlex.split(show)
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out = module.run_command(show)[1]
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out = out.split()
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# Global flags
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global NAME_EXISTS, NODE1_EXISTS, NODE2_EXISTS
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if name in out:
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NAME_EXISTS = True
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else:
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NAME_EXISTS = False
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if node1 in out:
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NODE1_EXISTS = True
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else:
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NODE2_EXISTS = False
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if node2 in out:
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NODE2_EXISTS = True
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else:
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NODE2_EXISTS = False
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def run_cli(module, cli):
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"""
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This method executes the cli command on the target node(s) and returns the
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output. The module then exits based on the output.
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:param cli: the complete cli string to be executed on the target node(s).
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:param module: The Ansible module to fetch command
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"""
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cliswitch = module.params['pn_cliswitch']
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state = module.params['state']
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command = get_command_from_state(state)
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cmd = shlex.split(cli)
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# 'out' contains the output
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# 'err' contains the error messages
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result, out, err = module.run_command(cmd)
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print_cli = cli.split(cliswitch)[1]
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# Response in JSON format
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if result != 0:
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module.exit_json(
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command=print_cli,
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stderr=err.strip(),
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msg="%s operation failed" % command,
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changed=False
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)
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if out:
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module.exit_json(
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command=print_cli,
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stdout=out.strip(),
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msg="%s operation completed" % command,
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changed=True
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)
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else:
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module.exit_json(
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command=print_cli,
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msg="%s operation completed" % command,
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changed=True
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)
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def get_command_from_state(state):
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"""
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This method gets appropriate command name for the state specified. It
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returns the command name for the specified state.
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:param state: The state for which the respective command name is required.
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"""
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command = None
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if state == 'present':
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command = 'cluster-create'
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if state == 'absent':
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command = 'cluster-delete'
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return command
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def main():
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""" This section is for arguments parsing """
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module = AnsibleModule(
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argument_spec=dict(
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pn_cliusername=dict(required=False, type='str'),
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pn_clipassword=dict(required=False, type='str', no_log=True),
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pn_cliswitch=dict(required=False, type='str', default='local'),
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state =dict(required=True, type='str',
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choices=['present', 'absent']),
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pn_name=dict(required=True, type='str'),
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pn_cluster_node1=dict(type='str'),
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pn_cluster_node2=dict(type='str'),
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pn_validate=dict(type='bool')
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),
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required_if=(
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["state", "present",
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["pn_name", "pn_cluster_node1", "pn_cluster_node2"]],
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["state", "absent", ["pn_name"]]
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)
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)
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# Accessing the parameters
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state = module.params['state']
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name = module.params['pn_name']
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cluster_node1 = module.params['pn_cluster_node1']
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cluster_node2 = module.params['pn_cluster_node2']
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validate = module.params['pn_validate']
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command = get_command_from_state(state)
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# Building the CLI command string
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cli = pn_cli(module)
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if command == 'cluster-create':
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check_cli(module, cli)
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if NAME_EXISTS is True:
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module.exit_json(
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skipped=True,
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msg='Cluster with name %s already exists' % name
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)
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if NODE1_EXISTS is True:
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module.exit_json(
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skipped=True,
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msg='Node %s already part of a cluster' % cluster_node1
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)
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if NODE2_EXISTS is True:
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module.exit_json(
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skipped=True,
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msg='Node %s already part of a cluster' % cluster_node2
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)
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cli += ' %s name %s ' % (command, name)
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cli += 'cluster-node-1 %s cluster-node-2 %s ' % (cluster_node1,
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cluster_node2)
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if validate is True:
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cli += ' validate '
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if validate is False:
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cli += ' no-validate '
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if command == 'cluster-delete':
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check_cli(module, cli)
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if NAME_EXISTS is False:
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module.exit_json(
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skipped=True,
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msg='Cluster with name %s does not exist' % name
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)
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cli += ' %s name %s ' % (command, name)
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run_cli(module, cli)
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# AnsibleModule boilerplate
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from ansible.module_utils.basic import AnsibleModule
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if __name__ == '__main__':
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main()
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