ICMP doesn't work on Docker Linux

[waywardone]

I'm using gatus in a docker container on a Linux host and find that all icmp tests fail - even for hosts that are up and reachable via ICMP. Other tests like TCP and HTTP work as expected. I noticed the changes related to pinger.SetPrivileged and have picked up the most recent image available but ICMP tests still fail. Here's my docker-compose:

   gatus:
     container_name: gatus
     hostname: gatus
     restart: unless-stopped
     image: twinproduction/gatus:latest
     ports:
       - 4008:8080
     volumes:
       - ${USERDIR}/docker/gatus/data:/data
       - ${USERDIR}/docker/gatus/config.yaml:/config/config.yaml
     environment:
         TZ: "${TZ}"

and here's an example configuration for icmp that fails (when it should not):

   - name: huginn
     group: my-network
     url: "icmp://google.com"
     interval: 1m
     conditions:
       - "[CONNECTED] == true"

A log entry for the test:

2021/10/07 02:53:15 [watchdog][execute] Monitored group=my-network; service=google; success=false; errors=0; duration=0s

Other things I've tried without any difference in behavior:

• used IP addresses instead of names
• configured ICMP test for 127.0.0.1

[TwiN]

Hello @waywardone,

Did it work prior to the recent changes on pinger.SetPrivileged?

[TwiN]

Yup I was able to reproduce it.
For some reason, it works on Linux, but not on Linux on Docker.

I'll do a quick fix for now.

[TwiN]

Can you try latest and let me know?

[waywardone]

Works as expected now. Thank you for the quick turnaround.

[sashkab]

Can confirm that with c423afb tests are passing in docker container, while they stopped in 3.2.0 and 3.2.1... Could you please consider rereleasing patch release with this fix?

Thanks!

[TwiN]

@sashkab Will do shortly, as I just changed my username and need to re-release every library I have 🤣

[TwiN]

Released in v3.2.2

[roughnecks]

Didn't want to open another issue but icmp-ping doesn't work with GO too.

I tried "google.com" which resolves to IPv6 on my host and also 1 of google.com's IPv4 - always fails.