monitors: Add monitor for /proc/meminfo

monitor/helpers.py

@@ -0,0 +1,5 @@
+
+def read_file(filename):
+    """Read the contents of :param:filename"""
+    with open(filename, 'r') as f:
+        return f.readall().split('\n')

monitor/monitors/memory.py

@@ -0,0 +1,14 @@
+from monitor.functions import register
+from monitor.helpers import read_file
+
+
+def monitor_memory(record):
+    "Monitors system memory"
+    meminfo = read_file('/proc/meminfo')
+    print meminfo
+    for line in meminfo:
+        tokenized_line = line.split()
+        if len(tokenized_line) > 1:
+            key, value = tokenized_line[:2]
+            key = key.strip(':')
+            record(key, value)

tests/unit/monitors/test_memory.py

@@ -0,0 +1,41 @@
+from mock import patch, MagicMock
+from nose.tools import eq_
+
+from monitor.monitors.memory import monitor_memory
+import monitor.monitors.memory as mod
+
+
+@patch.object(mod, 'read_file')
+def test_memory(mock_read_file):
+    mock_read_file.return_value = MEMINFO.split('\n')
+    mock_record = MagicMock(name='record')
+    monitor_memory(mock_record)
+
+    mock_record.assert_any_call('MemFree', '69936')
+
+
+MEMINFO = """MemTotal:       255908 kB
+MemFree:         69936 kB
+Buffers:         15812 kB
+Cached:         115124 kB
+SwapCached:          0 kB
+Active:          92700 kB
+Inactive:        63792 kB
+HighTotal:           0 kB
+HighFree:            0 kB
+LowTotal:       255908 kB
+LowFree:         69936 kB
+SwapTotal:      524280 kB
+SwapFree:       524280 kB
+Dirty:               4 kB
+Writeback:           0 kB
+Mapped:          42236 kB
+Slab:            25912 kB
+Committed_AS:   118680 kB
+PageTables:       1236 kB
+VmallocTotal:  3874808 kB
+VmallocUsed:      1416 kB
+VmallocChunk:  3872908 kB
+HugePages_Total:     0
+HugePages_Free:      0
+Hugepagesize:     4096 kB"""