141 lines
3.8 KiB
Python
Executable File
141 lines
3.8 KiB
Python
Executable File
#!/usr/bin/env python3
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"""
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=pod
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=head1 NAME
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btrfs_device_usage - Script to monitor usage of btrfs devices
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=head1 CONFIGURATION
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Simply create a symlink in your plugins directory like with any other plugin.
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Must be run as root.
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[btrfs_device_usage]
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user root
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=head2 DEFAULT CONFIGURATION
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=head1 BUGS
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=head1 AUTHOR
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2019, HaseHarald
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=head1 MAGIC MARKERS
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#%# family=auto
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#%# capabilities=autoconf
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=head1 LICENSE
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LGPLv3
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=cut
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"""
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# This file contains a munin-plugin to gather btrfs statistics per device.
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#
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# This is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Lesser General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Lesser General Public License for more details.
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#
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# You should have received a copy of the GNU Lesser General Public License
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# along with this plugin. If not, see <http://www.gnu.org/licenses/>.
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import btrfs
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import sys
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def munin_config(fs):
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fsid = str(fs.fsid).replace('-', '_')
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print("multigraph btrfs_device_usage_byte_" + fsid)
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print("graph_title btrfs usage by device in bytes on " + fs.path)
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print("graph_args --base 1024 -l 0")
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print("graph_scale yes")
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print("graph_vlabel bytes")
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print("graph_category disk")
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print("graph_info This graph shows bytes used by btrfs on every device")
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devices = fs.devices()
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for this_device in devices:
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this_dev_info = fs.dev_info(this_device.devid)
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this_dev_name = this_dev_info.path.replace('/dev/', '')
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print("btrfs_bytes_" + fsid + "_" + str(this_device.devid) +
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".label " + this_dev_name)
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print("")
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print("multigraph btrfs_device_usage_percent_" + fsid)
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print("graph_title btrfs usage by device in percent on " + fs.path)
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print("graph_args --base 1000 -l 0")
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print("graph_scale no")
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print("graph_vlabel %")
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print("graph_category disk")
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print("graph_info This graph shows percentage used by btrfs on every \
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device. Maesured in percentage of device capacity.")
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devices = fs.devices()
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for this_device in devices:
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this_dev_info = fs.dev_info(this_device.devid)
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this_dev_name = this_dev_info.path.replace('/dev/', '')
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print("btrfs_percent_" + fsid + "_" + str(this_device.devid) +
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".label " + this_dev_name)
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print("btrfs_percent_" + fsid + "_" + str(this_device.devid) + ".warning 95")
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print("btrfs_percent_" + fsid + "_" + str(this_device.devid) + ".critical 98")
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print("")
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def munin_values(fs):
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fsid = str(fs.fsid).replace('-', '_')
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devices = fs.devices()
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print("multigraph btrfs_device_usage_byte_" + fsid)
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for this_device in devices:
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this_dev_info = fs.dev_info(this_device.devid)
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print("btrfs_bytes_" + fsid + "_" + str(this_device.devid) +
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".value " + str(this_dev_info.bytes_used))
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print("")
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# Reset device iterator
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devices = fs.devices()
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print("multigraph btrfs_device_usage_percent_" + fsid)
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for this_device in devices:
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this_dev_info = fs.dev_info(this_device.devid)
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usage = 100.0 * this_dev_info.bytes_used / this_dev_info.total_bytes
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print("btrfs_percent_" + fsid + "_" + str(this_device.devid) +
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".value " + str(round(usage, 2)))
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print("")
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def main():
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for path in btrfs.utils.mounted_filesystem_paths():
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with btrfs.FileSystem(path) as fs:
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if len(sys.argv) > 1 and sys.argv[1] == "config":
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munin_config(fs)
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else:
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munin_values(fs)
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if __name__ == "__main__":
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main()
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exit(0)
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