DS refactor, fixes/optimizations

mktxp/collector/pool_collector.py

@@ -0,0 +1,43 @@
+# coding=utf8
+## Copyright (c) 2020 Arseniy Kuznetsov
+##
+## This program 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 2
+## of the License, or (at your option) any later version.
+##
+## This program 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.
+
+
+from mktxp.cli.config.config import MKTXPConfigKeys
+from mktxp.collector.base_collector import BaseCollector
+from mktxp.datasource.pool_ds import PoolMetricsDataSource, PoolUsedMetricsDataSource
+
+
+class PoolCollector(BaseCollector):
+    ''' IP Pool Metrics collector
+    '''    
+    @staticmethod
+    def collect(router_entry):
+        # initialize all pool counts, including those currently not used
+        pool_records = PoolMetricsDataSource.metric_records(router_entry, metric_labels = ['name'])   
+        if pool_records:
+            pool_used_labels = ['pool']
+            pool_used_counts = {pool_record['name']: 0 for pool_record in pool_records}
+
+            # for pools in usage, calculate the current numbers
+            pool_used_records = PoolUsedMetricsDataSource.metric_records(router_entry, metric_labels = pool_used_labels)   
+            for pool_used_record in pool_used_records:
+                pool_used_counts[pool_used_record['pool']] = pool_used_counts.get(pool_used_record['pool'], 0) + 1
+
+           # compile used-per-pool records
+            used_per_pool_records = [{ MKTXPConfigKeys.ROUTERBOARD_NAME: router_entry.router_id[MKTXPConfigKeys.ROUTERBOARD_NAME],
+                                       MKTXPConfigKeys.ROUTERBOARD_ADDRESS: router_entry.router_id[MKTXPConfigKeys.ROUTERBOARD_ADDRESS],
+                                       'pool': key, 'count': value} for key, value in pool_used_counts.items()]
+            
+            # yield used-per-pool metrics
+            used_per_pool_metrics = BaseCollector.gauge_collector('ip_pool_used', 'Number of used addresses per IP pool', used_per_pool_records, 'count', ['pool'])
+            yield used_per_pool_metrics