vrrp: T2223: move VRRP within ifconfig

Tidied up the code and moved it under VRRP in view to use
with show-interface (which has VRRP filtering)
No change in functionality

1 files changed, 145 insertions, 0 deletions

diff --git a/python/vyos/ifconfig/vrrp.py b/python/vyos/ifconfig/vrrp.py
new file mode 100644
index 000000000..29b10dd9e
--- /dev/null
+++ b/python/vyos/ifconfig/vrrp.py
@@ -0,0 +1,145 @@
+# Copyright 2019 VyOS maintainers and contributors <maintainers@vyos.io>
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library 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
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library.  If not, see <http://www.gnu.org/licenses/>.
+
+import os
+import json
+import signal
+from time import time
+from time import sleep
+
+from tabulate import tabulate
+
+from vyos import airbag
+from vyos import util
+
+
+class VRRPError(Exception):
+    pass
+
+class VRRP(object):
+    _vrrp_prefix = '00:00:5E:00:01:'
+    location = {
+        'pid':      '/run/keepalived.pid',
+        'fifo':     '/run/keepalived_notify_fifo',
+        'state':    '/tmp/keepalived.data',
+        'stats':    '/tmp/keepalived.stats',
+        'json':     '/tmp/keepalived.json',
+        'daemon':   '/etc/default/keepalived',
+        'config':   '/etc/keepalived/keepalived.conf',
+        'vyos':     '/run/keepalived_config.dict',
+    }
+
+    _signal = {
+        'state':  signal.SIGUSR1,
+        'stats':  signal.SIGUSR2,
+        'json':   signal.SIGRTMIN + 2,
+    }
+
+    _name = {
+        'state': 'information',
+        'stats': 'statistics',
+        'json':  'data',
+    }
+
+    state = {
+        0: 'INIT',
+        1: 'BACKUP',
+        2: 'MASTER',
+        3: 'FAULT',
+        # UNKNOWN
+    }
+
+    def __init__(self,ifname):
+        self.ifname = ifname
+
+    def enabled(self):
+        return self.ifname in self.active_interfaces()
+
+    @classmethod
+    def active_interfaces(cls):
+        if not os.path.exists(cls.location['pid']):
+            return []
+        data = cls.collect('json')
+        return [group['data']['ifp_ifname'] for group in json.loads(data)]
+
+    @classmethod
+    def decode_state(cls, code):
+        return cls.state.get(code,'UNKNOWN')
+
+    # used in conf mode
+    @classmethod
+    def is_running(cls):
+        if not os.path.exists(cls.location['pid']):
+            return False
+        return util.process_running(cls.location['pid'])
+
+    @classmethod
+    def collect(cls, what):
+        fname = cls.location[what]
+        try:
+            # send signal to generate the configuration file
+            pid = util.read_file(cls.location['pid'])
+            os.kill(int(pid), cls._signal[what])
+
+            # shoud look for file size change ?
+            sleep(0.2)
+            return util.read_file(fname)
+        except Exception:
+            name = cls._name[what]
+            raise VRRPError(f'VRRP {name} is not available')
+        finally:
+            if os.path.exists(fname):
+                os.remove(fname)
+
+    @classmethod
+    def disabled(cls):
+        if not os.path.exists(cls.location['vyos']):
+            return []
+
+        disabled = []
+        config = json.loads(util.readfile(cls.location['vyos']))
+
+        # add disabled groups to the list
+        for group in config['vrrp_groups']:
+            if group['disable']:
+                disabled.append(
+                    [group['name'], group['interface'], group['vrid'], 'DISABLED', ''])
+
+        # return list with disabled instances
+        return disabled
+
+    @classmethod
+    def format (cls, data):
+        headers = ["Name", "Interface", "VRID", "State", "Last Transition"]
+        groups = []
+
+        data = json.loads(data)
+        for group in data:
+            data = group['data']
+
+            name = data['iname']
+            intf = data['ifp_ifname']
+            vrid = data['vrid']
+            state = cls.decode_state(data["state"])
+
+            since = int(time() - float(data['last_transition']))
+            last = util.seconds_to_human(since)
+
+            groups.append([name, intf, vrid, state, last])
+
+        # add to the active list disabled instances
+        groups.extend(cls.disabled())
+        return(tabulate(groups, headers))
+