Missing dependencies for master-ip-setup

[rowlap]

Ganeti's INSTALL doc mentions, among others, requirements on

• iproute2
• arping
• ndisc6
• fping

however only iproute is mentioned in the spec file. Unfortunately due to the way tools/master-ip-setup is written, there's no way to detect a missing binary vs a successful test in code like:

  # Check if the master IP address is already configured on another machine
  if fping -c $FPING_PACKET_COUNT -p $FPING_PACKET_INTERVAL_MS \
      $MASTER_IP >/dev/null 2>&1; then
    echo "Error: master IP address configured on another machine." >&2
    exit 1
  fi

• If fping cannot ping the MASTER_IP address on another machine, we continue.
• If fping is missing, we also continue.

Please add the necessary Requires lines to ganeti.spec to ensure the master-ip-setup script can run.

[rowlap]

Some of the packages require EPEL, but that's already mentioned in the installation tutorial.

[jfut]

Thanks for the request.

I checked and found that what was missing were packages for ndisc6 and fping.

• iproute2
  • el7: iproute
  • el8: iproute
• arping
  • el7: iputils
  • el8: iputils
• ndisc6
  • el7: ndisc6 (EPEL)
  • el8: missing
• fping
  • el7: fping (EPEL)
  • el8: fping (EPEL)

ndisc6 is provided in EPEL for el7, but it seems that be not yet available for el8. So, we would like to add Requires: fping for both el7 and el8, and Requires: ndisc6 for el7 only for now.

[jfut]

We have just released Ganeti 3.0.1-2 RPM.

[rowlap]

Thanks for the fast response.

Unfortunately it seems the ndisc6 Fedora package maintainer is looking to / has already stepped down.
https://bugzilla.redhat.com/show_bug.cgi?id=1779134#c3

I don't have any great suggestions therefore about running Ganeti on RHEL8 with IPv6.

[jfut]

Thanks for sharing the information. If there are more requests for IPv6 support in the future, and if it is still unresolved at that time, I would like to consider building the ndisc6 package for EL8.