Figuring out a headless server's zeroconf addr

[poma]

On 22.07.2014 17:27, Robert Moskowitz wrote:
>
> On 07/22/2014 10:54 AM, poma wrote:
>> On 22.07.2014 16:43, poma wrote:
>>> On 22.07.2014 16:24, Robert Moskowitz wrote:
>>>>
>>>> On 07/22/2014 09:57 AM, Ed Greshko wrote:
>>>>> On 07/22/14 21:49, Robert Moskowitz wrote:
>>>>>> On 07/22/2014 09:33 AM, Ed Greshko wrote:
>>>>>>> On 07/22/14 21:22, Robert Moskowitz wrote:
>>>>>>>> But what file is this in now? /etc/sysconfig/network-scripts is
>>>>>>>> a mess now with scripts for each wifi connection and I can't
>>>>>>>> find any for my ethernet adapter.
>>>>>>> Well, "ip link" will/should give a list of links.
>>>>>> ip link
>>>>>> 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state
>>>>>> UNKNOWN mode DEFAULT group default
>>>>>>         link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
>>>>>> 2: p6p1: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc
>>>>>> pfifo_fast state DOWN mode DEFAULT group default qlen 1000
>>>>>>         link/ether e8:9a:8f:8d:7b:56 brd ff:ff:ff:ff:ff:ff
>>>>>> 3: wlp4s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq
>>>>>> state UP mode DORMANT group default qlen 1000
>>>>>>         link/ether ac:81:12:9c:e0:95 brd ff:ff:ff:ff:ff:ff
>>>>>>
>>>>>> But I cannot find a script file for p6p1.  Perhaps it only exists
>>>>>> when the link is up, so where do I put this option?
>>>>>>
>>>>>>
>>>>> Odd.  First off, NO-CARRIER would suggest the link is not
>>>>> connected.  I just pulled the plug on one of my systems and I see....
>>>>
>>>> Well this is on my notebook and the ethernet was not connected at the
>>>> time.  So now it is plugged in via crossover to the server and link
>>>> is up.
>>>>
>>>>> [egreshko at f20f ~]$ ip link
>>>>> 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN
>>>>> mode DEFAULT group default
>>>>>         link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
>>>>> 2: p2p1: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc
>>>>> pfifo_fast state DOWN mode DEFAULT group default qlen 1000
>>>>>         link/ether 08:00:27:b7:04:4a brd ff:ff:ff:ff:ff:ff
>>>>>
>>>>> But the config file still exists.
>>>>>
>>>>> [egreshko at f20f ~]$ ls /etc/sysconfig/network-scripts/ifcfg-p2p1
>>>>> /etc/sysconfig/network-scripts/ifcfg-p2p1
>>>>
>>>> But still:
>>>>
>>>> ls /etc/sysconfig/network-scripts/ifcfg-p*
>>>> ls: cannot access /etc/sysconfig/network-scripts/ifcfg-p*: No such file
>>>> or directory
>>>>
>>>>
>>>>> Do you have access to the system to use the GUI tools of network
>>>>> manager?   (I'm assuming you are using nm).
>>>>>
>>>>>
>>>> I cannot see anyplace to specify use zeroconf if no dhcp.
>>>>
>>>> This is gnome3 on F20...
>>>>
>>>
>>> :)
>>>
>>> # file /etc/NetworkManager/NetworkManager.conf
>>> /etc/NetworkManager/NetworkManager.conf: symbolic link to
>>> `/etc/NetworkManager/conf.d/keyfile-plugin.conf'
>>>
>>> # cat /etc/NetworkManager/conf.d/keyfile-plugin.conf
>>> [main]
>>> plugins=keyfile
>>>
>>> [keyfile]
>>> ...
>>>
>>> # ll /etc/NetworkManager/system-connections/
>>> # rpm -ql NetworkManager | grep man
>>> # rpm -qi $(rpm -qf /usr/lib/systemd/system/avahi-daemon.service)
>>>
>>
>> in addition
>> # grep ^hosts /etc/nsswitch.conf
>> # man 5 nsswitch.conf
>> http://0pointer.de/lennart/projects/nss-mdns/
>> # man 5 avahi.hosts
>> # man 5 avahi-daemon.conf
>>
>> In the end it turns out that 'ZeroConf' ain't really configless. :)
>
> Today
>
> avahi-autoipd -D p6p1
>
> is working.  Well yesterday, I had to use my internal ethernet on my
> notebook for internet connection, as WiFi was down, so I was using a
> D-link USB ethernet.  Today, WiFi is up so using the internal ethernet.
> Must be something about the drivers or such.  Anyway if you want
> zeroconf for a 'one time' thing, this is the command.  What I really
> want is if no DHCP, use zeroconf.  I think it use to work this way.
>
> Though I can see why not to move fully into the IPv6 world.  "There is
> no DHCPv4 stupid because there is no IPv4 here!"  :)
>
>   From the 'driver' behind rfc1918 and a big backer of IPv6 (use Teredo
> if you must!).  :)'
>

Don't worry about it. Lennart 'll figure it out for us. :)
[systemd-devel] mdns support to networkd
http://lists.freedesktop.org/archives/systemd-devel/2014-June/020362.html


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