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Update README.md for ICMP Health Check note for Private Probes #59

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Update README.md for ICMP Health Check note for Private Probes #59

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update readme for private probe case where ICMP is blocked to externa…
Feb 5, 2019
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update README.md
Feb 5, 2019
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further update README.md
Feb 5, 2019
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further update README.md
jordo1138 Feb 5, 2019
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Merge branch 'master' of https://github.com/jordo1138/raintank-probe
Feb 5, 2019
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16 changes: 16 additions & 0 deletions README.md
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Expand Up @@ -85,4 +85,20 @@ api-key = <Your Grafana.net ApiKey>
raintank-probe -config <path to your config>
```

## Note on Private Probe ICMP Health Checks
By default the private probe will determine its own network health by pinging this comma separated list of sites: google.com,youtube.com,facebook.com,twitter.com,wikipedia.com

If your private network does not allow ICMP traffic to external sites, you will need to modify probe.ini found here
```
/etc/raintank/probe.ini
```
Example probe.ini from docker container
```
log-level = 2
name = demo1
server-url = wss://worldping-api.raintank.io/
tsdb-url = https://tsdb-gw.raintank.io/
api-key = changeme
health-hosts = icmp-reachable-host.com
```
After modifying the health-hosts to an ICMP reachable host, restart. Then the other endpoint checks you have assigned to the probe will begin to execute.