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Fixes to @RadishTheHut's memory facts as discussed in

Browse source 
https://github.com/ansible/ansible/pull/10129#issuecomment-72077500

* Switch default value from 0 to None.
* Prefill keys with default value so that determining calculated values
  is easier
This commit is contained in:
Toshio Kuratomi 2015-01-29 12:09:19 -08:00
parent 0c3a273805
commit f20967078e
1 changed files with 32 additions and 15 deletions
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47
lib/ansible/module_utils/facts.py
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@ -602,9 +602,11 @@ class LinuxHardware(Hardware):
""" """
platform = 'Linux' platform = 'Linux'
MEMORY_FACTS = ['MemTotal', 'SwapTotal', 'MemFree', 'SwapFree']
EXTRA_MEMORY_FACTS = ['Buffers', 'Cached', 'SwapCached']
# Originally only had these four as toplevelfacts
ORIGINAL_MEMORY_FACTS = frozenset(('MemTotal', 'SwapTotal', 'MemFree', 'SwapFree'))
# Now we have all of these in a dict structure
MEMORY_FACTS = ORIGINAL_MEMORY_FACTS.union(('Buffers', 'Cached', 'SwapCached'))
def __init__(self): def __init__(self):
Hardware.__init__(self) Hardware.__init__(self)
@ -621,34 +623,49 @@ class LinuxHardware(Hardware):
return self.facts return self.facts
def get_memory_facts(self): def get_memory_facts(self):
memstats = {}
if not os.access("/proc/meminfo", os.R_OK): if not os.access("/proc/meminfo", os.R_OK):
return return
# No defaultdict in py2.4
memstat_keys = self.MEMORY_FACTS.union(
('real:used', 'nocache:free', 'nocache:used', 'swap:used'))
memstats = dict(zip(memstat_keys, (None,) * len(memstat_keys)))
for line in open("/proc/meminfo").readlines(): for line in open("/proc/meminfo").readlines():
data = line.split(":", 1) data = line.split(":", 1)
key = data[0] key = data[0]
if key in LinuxHardware.MEMORY_FACTS: if key in self.ORIGINAL_MEMORY_FACTS:
val = data[1].strip().split(' ')[0] val = data[1].strip().split(' ')[0]
self.facts["%s_mb" % key.lower()] = long(val) / 1024 self.facts["%s_mb" % key.lower()] = long(val) / 1024
if key in LinuxHardware.MEMORY_FACTS or key in LinuxHardware.EXTRA_MEMORY_FACTS:
if key in self.MEMORY_FACTS:
val = data[1].strip().split(' ')[0] val = data[1].strip().split(' ')[0]
memstats[key.lower()] = long(val) / 1024 memstats[key.lower()] = long(val) / 1024
if None not in (memstats['memtotal'], memstats['memfree']):
memstats['real:used'] = memstats['memtotal'] - memstats['memfree']
if None not in (memstats['cached'], memstats['memfree'], memstats['buffers']):
memstats['nocache:free'] = memstats['cached'] + memstats['memfree'] + memstats['buffers']
if None not in (memstats['memtotal'], memstats['nocache:free']):
memstats['nocache:used'] = memstats['memtotal'] - memstats['nocache:free']
if None not in (memstats['swaptotal'], memstats['swapfree']):
memstats['swap:used'] = memstats['swaptotal'] - memstats['swapfree']
self.facts['memory_mb'] = { self.facts['memory_mb'] = {
'real' : { 'real' : {
'total': memstats.get('memtotal', 0), 'total': memstats['memtotal'],
'used': (memstats.get('memtotal', 0) - memstats.get('memfree', 0)), 'used': memstats['real:used'],
'free': memstats.get('memfree', 0) 'free': memstats['memfree'],
}, },
'nocache' : { 'nocache' : {
'free': memstats.get('cached', 0) + memstats.get('memfree', 0) + memstats.get('buffers', 0), 'free': memstats['nocache:free'],
'used': memstats.get('memtotal', 0) - (memstats.get('cached', 0) + memstats.get('memfree', 0) + memstats.get('buffers', 0)) 'used': memstats['nocache:used'],
}, },
'swap' : { 'swap' : {
'total': memstats.get('swaptotal', 0), 'total': memstats['swaptotal'],
'free': memstats.get('swapfree', 0), 'free': memstats['swapfree'],
'used': memstats.get('swaptotal', 0) - memstats.get('swapfree', 0), 'used': memstats['swap:used'],
'cached': memstats.get('swapcached', 0) 'cached': memstats['swapcached'],
} },
} }
def get_cpu_facts(self): def get_cpu_facts(self):