62 lines
2.2 KiB
Markdown
62 lines
2.2 KiB
Markdown
# Disk Input Plugin
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The disk input plugin gathers metrics about disk usage.
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Note that `used_percent` is calculated by doing `used / (used + free)`, _not_
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`used / total`, which is how the unix `df` command does it. See
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https://en.wikipedia.org/wiki/Df_(Unix) for more details.
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### Configuration:
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```toml
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# Read metrics about disk usage by mount point
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[[inputs.disk]]
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## By default stats will be gathered for all mount points.
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## Set mount_points will restrict the stats to only the specified mount points.
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# mount_points = ["/"]
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## Ignore mount points by filesystem type.
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ignore_fs = ["tmpfs", "devtmpfs", "devfs", "overlay", "aufs", "squashfs"]
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```
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#### Docker container
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To monitor the Docker engine host from within a container you will need to
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mount the host's filesystem into the container and set the `HOST_PROC`
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environment variable to the location of the `/proc` filesystem. If desired, you can
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also set the `HOST_MOUNT_PREFIX` environment variable to the prefix containing
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the `/proc` directory, when present this variable is stripped from the
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reported `path` tag.
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```
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docker run -v /:/hostfs:ro -e HOST_MOUNT_PREFIX=/hostfs -e HOST_PROC=/hostfs/proc telegraf
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```
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### Metrics:
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- disk
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- tags:
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- fstype (filesystem type)
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- device (device file)
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- path (mount point path)
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- mode (whether the mount is rw or ro)
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- fields:
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- free (integer, bytes)
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- total (integer, bytes)
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- used (integer, bytes)
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- used_percent (float, percent)
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- inodes_free (integer, files)
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- inodes_total (integer, files)
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- inodes_used (integer, files)
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### Example Output:
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```
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disk,fstype=hfs,mode=ro,path=/ free=398407520256i,inodes_free=97267461i,inodes_total=121847806i,inodes_used=24580345i,total=499088621568i,used=100418957312i,used_percent=20.131039916242397 1453832006274071563
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disk,fstype=devfs,mode=rw,path=/dev free=0i,inodes_free=0i,inodes_total=628i,inodes_used=628i,total=185856i,used=185856i,used_percent=100 1453832006274137913
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disk,fstype=autofs,mode=rw,path=/net free=0i,inodes_free=0i,inodes_total=0i,inodes_used=0i,total=0i,used=0i,used_percent=0 1453832006274157077
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disk,fstype=autofs,mode=rw,path=/home free=0i,inodes_free=0i,inodes_total=0i,inodes_used=0i,total=0i,used=0i,used_percent=0 1453832006274169688
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```
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