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provider/cloudstack: use nm to get metadata address #1275

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provider/cloudstack: use nm to get metadata address #1275

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Commits on Oct 27, 2021

  1. provider/cloudstack: use nm to get metadata address 

    Currently, Ignition tries to use networkd DHCP leases to get the
metadata service address in CloudStack provider.

As Fedora CoreOS switched to NetworkManager, CloudStack metadata
cannot be found anymore.

With this commit, Ignition uses several methods in order to find
the address of the CloudStack Virtual Router (which serves the
metadata service):

1. A DNS request on "data-server";
2. The DHCP option "dhcp_server_identifier" as returned by
   NetworkManager (queried using DBus)
3. The current process (networkd DHCP leases)
4. The default gateway (as defined in /proc/net/route)

Cf. coreos/fedora-coreos-tracker#716
    @olivierlemasle
    olivierlemasle committed Oct 27, 2021
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