Nomad trunk tries to execute '/sbin/ip route' which fails on CoreOS

[kmalec]

Nomad version

Output from nomad version
Nomad v0.6.0-dev (67cd5154bb0add222f1d4dc56283ff9f47a5ec8f+CHANGES)

Operating system and Environment details

Container Linux by CoreOS stable (1353.8.0)

Issue

Nomad in 0.6 branch tries to execute /sbin/ip route during startup, which fails on CoreOS, because they have iproute2 in /usr/bin/ip.
This doesn't happen on 0.5.6; apparently recent change to use github.com/hashicorp/go-sockaddr

Reproduction steps

Compile nomad from trunk and try to run:
nomad agent -server -data-dir /data/nomad-server/data/ -config /data/nomad-server/config/ -region eu-west -dc eu-west-1

Nomad Server logs (if appropriate)

Jun 07 19:32:01 ip-10-249-200-172 systemd[1]: Started Nomad server.
Jun 07 19:32:01 ip-10-249-200-172 nomad[22507]: No configuration loaded from /data/nomad-server/config
Jun 07 19:32:01 ip-10-249-200-172 nomad[22507]: ==> Failed to parse HTTP advertise address: Unable to parse default advertise address: Unable to parse address template "{{ GetPrivateIP }}": unable to execute sockaddr input "{{ GetPrivateIP }}": template: sockaddr.Parse:1:3: executing "sockaddr.Parse" at <GetPrivateIP>: error calling GetPrivateIP: fork/exec /sbin/ip: no such file or directory
Jun 07 19:32:01 ip-10-249-200-172 systemd[1]: nomad-server.service: Main process exited, code=exited, status=1/FAILURE
Jun 07 19:32:01 ip-10-249-200-172 systemd[1]: nomad-server.service: Unit entered failed state.
Jun 07 19:32:01 ip-10-249-200-172 systemd[1]: nomad-server.service: Failed with result 'exit-code'.
Jun 07 19:32:06 ip-10-249-200-172 systemd[1]: nomad-server.service: Service hold-off time over, scheduling restart.
Jun 07 19:32:06 ip-10-249-200-172 systemd[1]: Stopped Nomad server.

Nomad Client logs (if appropriate)

N/A

Job file (if appropriate)

N/A

[dadgar]

@kmalec Can you file and cross link an issue against that project.

[kmalec]

Did that. Recompiled Nomad with changing that path to /usr/bin/ip for extra CoreOS build, works (as expected).

[github-actions]

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