[Bug 1786726] Re: dns-search rendered for ipv4 when no addresses configured

[Mathieu Trudel-Lapierre]

** Also affects: netplan.io (Ubuntu)
   Importance: Undecided
       Status: New

** Changed in: netplan.io (Ubuntu)
       Status: New => Fix Released

** Changed in: netplan
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1786726

Title:
  dns-search rendered for ipv4 when no addresses configured

Status in netplan:
  Fix Released
Status in netplan.io package in Ubuntu:
  Fix Released

Bug description:
  In an IPv6 static setup with NetworkManager, such as the following:

      ens8:
        accept-ra: false
        addresses: ['23:b0:87:58:65:f7:fb:8b/45', '63:94:73:e1:46:15:79:58/50']
        nameservers:
          addresses: ['f2:9d:bc:04:7b:87:ec:28']
          search: [lab, home]
        renderer: NetworkManager

  we see the following error in syslog:

  NetworkManager[19666]: <warn>  [1532665946.1502] keyfile: error loading connection from file /run/NetworkManager/system-connections/net
  plan-ens8: invalid connection: ipv4.dns-search: this property is not allowed for 'method=link-local'

  netplan renders an ipv4 dns search property, even though there is no
  configured ipv4 address. NetworkManager doesn't like this and it
  prevents the connection from being configured.

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