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https://github.com/tahoe-lafs/tahoe-lafs.git
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61 lines
1.9 KiB
Python
61 lines
1.9 KiB
Python
#! /usr/bin/python
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# This is a munin plugin to track the average number of shares per file in
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# each node's StorageServer. If this number is 100, that suggests there is
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# only a single node in the entire mesh. If the number is 2, that suggests
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# that there are 50 nodes in the entire mesh. If the number is 1, that
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# suggests that there are >= 100 nodes in the entire mesh. (if there were a
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# million nodes, this one node would only see a single share per file, so the
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# number of shares-per-file will never be less than 1).
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# Copy this plugin into /etc/munun/plugins/tahoe-sharesperfile and then put
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# the following in your /etc/munin/plugin-conf.d/foo file to let it know
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# where to find the basedirectory for each node:
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#
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# [tahoe-sharesperfile]
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# env.basedir_NODE1 /path/to/node1
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# env.basedir_NODE2 /path/to/node2
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# env.basedir_NODE3 /path/to/node3
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#
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import os, sys
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nodedirs = []
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for k,v in os.environ.items():
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if k.startswith("basedir_"):
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nodename = k[len("basedir_"):]
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nodedirs.append( (nodename, v) )
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nodedirs.sort()
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configinfo = \
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"""graph_title Allmydata Tahoe Shares Per File
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graph_vlabel shares per file
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graph_category tahoe
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graph_info This graph shows the number of shares present for each file hosted by this node's StorageServer
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"""
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for nodename, basedir in nodedirs:
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configinfo += "%s.label %s\n" % (nodename, nodename)
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configinfo += "%s.draw LINE2\n" % (nodename,)
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if len(sys.argv) > 1:
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if sys.argv[1] == "config":
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print configinfo
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sys.exit(0)
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for nodename, basedir in nodedirs:
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files = 0
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shares = 0
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for f in os.listdir(os.path.join(basedir, "storage")):
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if f == "incoming":
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continue
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files += 1
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filedir = os.path.join(basedir, "storage", f)
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shares += len(os.listdir(filedir))
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if files:
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shares_per_file = 1.0 * shares / files
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else:
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shares_per_file = 0.0
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print "%s.value %d" % (nodename, shares_per_file)
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