Girish Ramakrishnan
5fe73c5a46
The built-in df plugin cannot do the following:
* if we choose by type ext4, we want to skip devicemapper (on scaleway)
* the MountPoint of the appsdata directory is not possible to know at install time
Fixes #398
37 lines
1.2 KiB
Python
37 lines
1.2 KiB
Python
import collectd,os
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# https://blog.dbrgn.ch/2017/3/10/write-a-collectd-python-plugin/
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disks = []
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def init():
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global disks
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lines = [s.split() for s in os.popen("df --type=ext4 --output=source,target,size,used,avail").read().splitlines()]
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disks = lines[1:] # strip header
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collectd.info('custom df plugin initialized with %s' % disks)
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def read():
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for d in disks:
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device = d[0]
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if 'devicemapper' in d[1] or not device.startswith('/dev/'): continue
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instance = device[len('/dev/'):].replace('/', '-')
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try:
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st = os.statvfs(d[1]) # handle disk removal
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except:
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continue
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val = collectd.Values(type='df_complex', plugin='df', plugin_instance=instance)
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free = st.f_bavail * st.f_frsize # bavail is for non-root user. bfree is total
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val.dispatch(values=[free], type_instance='free')
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reserved = (st.f_bfree - st.f_bavail) * st.f_frsize # root took these
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val.dispatch(values=[reserved], type_instance='reserved')
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used = (st.f_blocks - st.f_bfree) * st.f_frsize
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val.dispatch(values=[used], type_instance='used')
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collectd.register_init(init)
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collectd.register_read(read)
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