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https://github.com/tahoe-lafs/tahoe-lafs.git
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71 lines
2.1 KiB
Python
71 lines
2.1 KiB
Python
#!/usr/bin/env python
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# This munin plugin isolates processes by looking for the 'pid' file created
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# by 'allmydata start', then extracts the amount of memory they consume (both
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# VmSize and VmRSS) from /proc
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import os, sys, re
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# for testing
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# os.environ["nodememory_warner1"] = "run/warner1"
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# os.environ["nodememory_warner2"] = "run/warner2"
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nodedirs = []
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for k,v in os.environ.items():
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if k.startswith("nodememory_"):
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nodename = k[len("nodememory_"):]
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nodedirs.append((nodename, v))
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nodedirs.sort(lambda a,b: cmp(a[0],b[0]))
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pids = {}
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for node,nodedir in nodedirs:
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pidfile = os.path.join(nodedir, "twistd.pid")
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if os.path.exists(pidfile):
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pid = int(open(pidfile,"r").read())
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pids[node] = pid
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fields = ["VmSize", "VmRSS"]
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if len(sys.argv) > 1:
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if sys.argv[1] == "config":
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configinfo = \
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"""graph_title Memory Consumed by Nodes
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graph_vlabel bytes
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graph_category Tahoe
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graph_info This graph shows the memory used by specific processes
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"""
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for nodename,nodedir in nodedirs:
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for f in fields:
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configinfo += "%s_%s.label %s used by %s\n" % (nodename, f,
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f, nodename)
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linetype = "LINE1"
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if f == "VmSize":
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linetype = "LINE2"
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configinfo += "%s_%s.draw %s\n" % (nodename, f, linetype)
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if f == "VmData":
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configinfo += "%s_%s.graph no\n" % (nodename, f)
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print configinfo
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sys.exit(0)
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nodestats = {}
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for node,pid in pids.items():
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stats = {}
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statusfile = "/proc/%s/status" % pid
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if not os.path.exists(statusfile):
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continue
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for line in open(statusfile,"r").readlines():
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for f in fields:
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if line.startswith(f + ":"):
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m = re.search(r'(\d+)', line)
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stats[f] = int(m.group(1))
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nodestats[node] = stats
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for node,stats in nodestats.items():
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for f,value in stats.items():
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# TODO: not sure if /proc/%d/status means 1000 or 1024 when it says
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# 'kB'
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print "%s_%s.value %d" % (node, f, 1024*value)
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