telegraf/plugins/inputs/ping/README.md

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# Ping Input Plugin
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Sends a ping message by executing the system ping command and reports the results.
Currently there is no support for GNU Inetutils, use with iputils-ping
instead:
```
apt-get install iputils-ping
```
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### Configuration:
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```toml
[[inputs.ping]]
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## List of urls to ping
urls = ["example.org"]
## Number of pings to send per collection (ping -c <COUNT>)
# count = 1
## Interval, in s, at which to ping. 0 == default (ping -i <PING_INTERVAL>)
## Not available in Windows.
# ping_interval = 1.0
## Per-ping timeout, in s. 0 == no timeout (ping -W <TIMEOUT>)
# timeout = 1.0
## Total-ping deadline, in s. 0 == no deadline (ping -w <DEADLINE>)
# deadline = 10
## Interface or source address to send ping from (ping -I <INTERFACE/SRC_ADDR>)
## on Darwin and Freebsd only source address possible: (ping -S <SRC_ADDR>)
# interface = ""
## Specify the ping executable binary, default is "ping"
# binary = "ping"
## Arguments for ping command
## when arguments is not empty, other options (ping_interval, timeout, etc) will be ignored
# arguments = ["-c", "3"]
```
#### File Limit
Since this plugin runs the ping command, it may need to open several files per
host. With a large host list you may receive a `too many open files` error.
To increase this limit on platforms using systemd it must be done in the
service file.
Find the service unit file:
```
$ systemctl show telegraf.service -p FragmentPath
FragmentPath=/lib/systemd/system/telegraf.service
```
Set the file number limit:
```
[Service]
LimitNOFILE=4096
```
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### Metrics:
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- ping
- tags:
- url
- fields:
- packets_transmitted (integer)
- packets_received (integer)
- percent_packets_loss (float)
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- ttl (integer, Not available on Windows)
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- average_response_ms (integer)
- minimum_response_ms (integer)
- maximum_response_ms (integer)
- standard_deviation_ms (integer, Not available on Windows)
- errors (float, Windows only)
- reply_received (integer, Windows only)
- percent_reply_loss (float, Windows only)
- result_code (int, success = 0, no such host = 1, ping error = 2)
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##### reply_received vs packets_received
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On Windows systems, "Destination net unreachable" reply will increment `packets_received` but not `reply_received`.
### Example Output:
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**Windows:**
```
ping,url=example.org result_code=0i,average_response_ms=7i,maximum_response_ms=9i,minimum_response_ms=7i,packets_received=4i,packets_transmitted=4i,percent_packet_loss=0,percent_reply_loss=0,reply_received=4i 1469879119000000000
```
**Linux:**
```
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ping,url=example.org average_response_ms=23.066,ttl=63,maximum_response_ms=24.64,minimum_response_ms=22.451,packets_received=5i,packets_transmitted=5i,percent_packet_loss=0,result_code=0i,standard_deviation_ms=0.809 1535747258000000000
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```