initial add of openswitch shared module

This commit adds a new shared module openswitch for building modules that
work with OpenSwitch.  This shared module supports connectivity to
OpenSwitch devices over SSH, CLI or REST.  It also adds an openswitch
documentation fragment for use in modules

lib/ansible/module_utils/openswitch.py

@@ -0,0 +1,246 @@
+#
+# (c) 2015 Peter Sprygada, <psprygada@ansible.com>
+#
+# 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/>.
+#
+import time
+import json
+
+try:
+    from runconfig import runconfig
+    from opsrest.settings import settings
+    from opsrest.manager import OvsdbConnectionManager
+    from opslib import restparser
+    HAS_OPS = True
+except ImportError:
+    HAS_OPS = False
+
+NET_PASSWD_RE = re.compile(r"[\r\n]?password: $", re.I)
+
+NET_COMMON_ARGS = dict(
+    host=dict(),
+    port=dict(type='int'),
+    username=dict(),
+    password=dict(no_log=True),
+    transport=dict(default='ssh', choices=['ssh', 'cli', 'rest']),
+)
+
+def to_list(val):
+    if isinstance(val, (list, tuple)):
+        return list(val)
+    elif val is not None:
+        return [val]
+    else:
+        return list()
+
+def get_idl():
+    manager = OvsdbConnectionManager(settings.get('ovs_remote'),
+                                     settings.get('ovs_schema'))
+    manager.start()
+    idl = manager.idl
+
+    init_seq_no = 0
+    while (init_seq_no == idl.change_seqno):
+        idl.run()
+        time.sleep(1)
+
+    return idl
+
+def get_schema():
+    return restparser.parseSchema(settings.get('ext_schema'))
+
+def get_runconfig():
+    idl = get_idl()
+    schema = get_schema()
+    return runconfig.RunConfigUtil(idl, schema)
+
+class Response(object):
+
+    def __init__(self, resp, hdrs):
+        self.body = resp.read()
+        self.headers = hdrs
+
+    @property
+    def json(self):
+        try:
+            return json.loads(self.body)
+        except ValueError:
+            return None
+
+class Rest(object):
+
+    def __init__(self, module):
+        self.module = module
+        self.baseurl = None
+
+    def connect(self):
+        host = self.module.params['host']
+        port = self.module.params['port']
+
+        if self.module.params['use_ssl']:
+            proto = 'https'
+            if not port:
+                port = 443
+        else:
+            proto = 'http'
+            if not port:
+                port = 80
+
+        self.baseurl = '%s://%s:%s/rest/v1' % (proto, host, port)
+
+    def _url_builder(self, path):
+        if path[0] == '/':
+            path = path[1:]
+        return '%s/%s' % (self.baseurl, path)
+
+    def send(self, method, path, data=None, headers=None):
+        url = self._url_builder(path)
+        data = self.module.jsonify(data)
+
+        if headers is None:
+            headers = dict()
+        headers.update({'Content-Type': 'application/json'})
+
+        resp, hdrs = fetch_url(self.module, url, data=data, headers=headers,
+                method=method)
+
+        return Response(resp, hdrs)
+
+    def get(self, path, data=None, headers=None):
+        return self.send('GET', path, data, headers)
+
+    def put(self, path, data=None, headers=None):
+        return self.send('PUT', path, data, headers)
+
+    def post(self, path, data=None, headers=None):
+        return self.send('POST', path, data, headers)
+
+    def delete(self, path, data=None, headers=None):
+        return self.send('DELETE', path, data, headers)
+
+class Cli(object):
+
+    def __init__(self, module):
+        self.module = module
+        self.shell = None
+
+    def connect(self, **kwargs):
+        host = self.module.params['host']
+        port = self.module.params['port'] or 22
+
+        username = self.module.params['username']
+        password = self.module.params['password']
+
+        self.shell = Shell()
+        self.shell.open(host, port=port, username=username, password=password)
+
+    def send(self, commands, encoding='text'):
+        return self.shell.send(commands)
+
+class OpsModule(AnsibleModule):
+
+    def __init__(self, *args, **kwargs):
+        super(OpsModule, self).__init__(*args, **kwargs)
+        self.connection = None
+        self._config = None
+        self._runconfig = None
+
+    @property
+    def config(self):
+        if not self._config:
+            self._config = self.get_config()
+        return self._config
+
+    def connect(self):
+        if self.params['transport'] == 'rest':
+            self.connection = Rest(self)
+        elif self.params['transport'] == 'cli':
+            self.connection = Cli(self)
+
+        try:
+            self.connection.connect()
+        except Exception, exc:
+            self.fail_json(msg=exc.message)
+
+    def configure(self, config):
+        if self.params['transport'] == 'cli':
+            commands = to_list(config)
+            commands.insert(0, 'configure terminal')
+            responses = self.execute(commands)
+            responses.pop(0)
+            return responses
+        elif self.params['transport'] == 'rest':
+            path = '/system/full-configuration'
+            return self.connection.put(path, data=config)
+        else:
+            if not self._runconfig:
+                self._runconfig = get_runconfig()
+            self._runconfig.write_config_to_db(config)
+
+    def execute(self, commands, **kwargs):
+        try:
+            return self.connection.send(commands, **kwargs)
+        except Exception, exc:
+            self.fail_json(msg=exc.message, commands=commands)
+
+    def disconnect(self):
+        self.connection.close()
+
+    def parse_config(self, cfg):
+        return parse(cfg, indent=4)
+
+    def get_config(self):
+        if self.params['transport'] == 'cli':
+            return self.execute('show running-config')[0]
+
+        elif self.params['transport'] == 'rest':
+            resp = self.connection.get('/system/full-configuration')
+            return resp.json
+
+        else:
+            if not self._runconfig:
+                self._runconfig = get_runconfig()
+            return self._runconfig.get_running_config()
+
+
+def get_module(**kwargs):
+    """Return instance of OpsModule
+    """
+    argument_spec = NET_COMMON_ARGS.copy()
+    if kwargs.get('argument_spec'):
+        argument_spec.update(kwargs['argument_spec'])
+    kwargs['argument_spec'] = argument_spec
+    kwargs['check_invalid_arguments'] = False
+
+    module = OpsModule(**kwargs)
+
+    if not HAS_OPS and module.params['transport'] == 'ssh':
+        module.fail_json(msg='could not import ops library')
+
+    # HAS_PARAMIKO is set by module_utils/shell.py
+    if module.params['transport'] == 'cli' and not HAS_PARAMIKO:
+        module.fail_json(msg='paramiko is required but does not appear to be installed')
+
+    # copy in values from local action.
+    params = json_dict_unicode_to_bytes(json.loads(MODULE_COMPLEX_ARGS))
+    for key, value in params.iteritems():
+        module.params[key] = value
+
+    if module.params['transport'] in ['cli', 'rest']:
+        module.connect()
+
+    return module
+

lib/ansible/utils/module_docs_fragments/openswitch.py

@@ -0,0 +1,66 @@
+#
+# (c) 2015, Peter Sprygada <psprygada@ansible.com>
+#
+# 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/>.
+
+
+class ModuleDocFragment(object):
+
+    # Standard files documentation fragment
+    DOCUMENTATION = """
+options:
+  host:
+    description:
+      - Specifies the DNS host name or address for connecting to the remote
+        device over the specified transport.  The value of host is used as
+        the destination address for the transport.  Note this argument
+        does not affect the SSH argument.
+    required: true
+  port:
+    description:
+      - Specifies the port to use when buiding the connection to the remote
+        device.  This value applies to either I(cli) or I().  The port
+        value will default to the approriate transport common port if
+        none is provided in the task.  (cli=22, http=80, https=443).  Note
+        this argument does not affect the SSH transport.
+    required: false
+    default: 0 (use common port)
+  username:
+    description:
+      - Configures the usename to use to authenticate the connection to
+        the remote device.  The value of I(username) is used to authenticate
+        either the CLI login or the eAPI authentication depending on which
+        transport is used. Note this argument does not affect the SSH
+        transport.
+    required: true
+  password:
+    description:
+      - Specifies the password to use when authentication the connection to
+        the remote device.  This is a common argument used for either I(cli)
+        or I(rest) transports.  Note this argument does not affect the SSH
+        transport
+    required: false
+    default: null
+  transport:
+    description:
+      - Configures the transport connection to use when connecting to the
+        remote device.  The transport argument supports connectivity to the
+        device over ssh, cli or REST.
+    required: true
+    default: ssh
+    choices: ['ssh', 'cli', 'rest']
+
+"""