[kwlug-disc] Problem reaching server

[Khalid Baheyeldin]

Not sure if I was clear the first time or not.

Adding br0 is what caused my physical server to hang on reboot, though it
worked fine until that.

This is NOT a solution to anything.

On Fri, Mar 13, 2015 at 8:19 AM, CrankyOldBugger <crankyoldbugger at gmail.com>
wrote:

> Ok, that was my mistake.  I'll do the auto br0 tonight.  Thanks for the
> idea.
>
>
> On Fri, 13 Mar 2015 at 05:47 Khalid Baheyeldin <kb at 2bits.com> wrote:
>
>> On Thu, Mar 12, 2015 at 11:14 PM, CrankyOldBugger <
>> crankyoldbugger at gmail.com> wrote:
>>
>>> That didn't seem to help.  I commented out all of the lines below
>>> virbr0.  Now I can't reach the VMs either.
>>>
>>> By bridging, I assumed you mean virbr0, which we all worked so hard to
>>> set up a few weeks ago.
>>>
>>
>> No. It was not virbr0.
>>
>> It was:
>>
>> auto br0
>> iface br0 inet dhcp
>>   bridge_ports eth0
>>
>> Again, I am using libvirt with kvm underneath, not any other
>> virtualization stack.
>>
>> I don't understand why I've been merrily rebooting since then but all of
>>> a sudden it starts to fail.  Just weird.
>>>
>>
>> In that case, it is a totally different problem. Mine never booted
>> successfully. In your case, it seems intermittent.
>>
>>
>>>
>>> I'll fiddle with it some more tomorrow.
>>>
>>>
>>> On Thu, 12 Mar 2015 at 19:05 Khalid Baheyeldin <kb at 2bits.com> wrote:
>>>
>>>> That happened to me when I had bridging on the physical host that has
>>>> virtualization. Things work, until you reboot, then server is not reachable.
>>>>
>>>> I didn't figure out why, and ended up abandoning the bridge I added to
>>>> /etc/network/interfaces, and using the default networking that is setup by
>>>> libvirt.
>>>>
>>>> On Thu, Mar 12, 2015 at 6:51 PM, CrankyOldBugger <
>>>> crankyoldbugger at gmail.com> wrote:
>>>>
>>>>> I'm puzzled...  I rebooted my Ubuntu server this morning (as updates
>>>>> needed a reboot) and now I can't reach it.
>>>>>
>>>>> Here's what I determined:
>>>>>
>>>>> It was running fine before the reboot!
>>>>> I can't ping the server from another machine on the same subnet.
>>>>> I can't SSH to the server.
>>>>> SSH is running on the server.
>>>>> I can't telnet to the server
>>>>> I can ssh from the server to itself, so ssh is running and listening
>>>>> on 22.
>>>>> If I try to ssh from another linux box on the same subnet, using
>>>>> either hostname or IP, I get "No route to host".
>>>>> Traceroute should only one hop, that being the client I started
>>>>> traceroute from, but that line ends in !H, which I believe means can't
>>>>> connect.
>>>>> IP address is fine.
>>>>> I can't ping out from the server.
>>>>> Now here's the fun part: I have two virtual machines hosted on this
>>>>> server, and they're both running fine.  I can connect to them and they can
>>>>> connect to the internet.
>>>>>
>>>>> Not sure what to think at this point.  Anyone have any ideas?
>>>>>
>>>>>
>>>>> _______________________________________________
>>>>> kwlug-disc mailing list
>>>>> kwlug-disc at kwlug.org
>>>>> http://kwlug.org/mailman/listinfo/kwlug-disc_kwlug.org
>>>>>
>>>>>
>>>>
>>>>
>>>> --
>>>> Khalid M. Baheyeldin
>>>> 2bits.com, Inc.
>>>> Fast Reliable Drupal
>>>> Drupal optimization, development, customization and consulting.
>>>> Simplicity is prerequisite for reliability. --  Edsger W.Dijkstra
>>>> Simplicity is the ultimate sophistication. --   Leonardo da Vinci
>>>> For every complex problem, there is an answer that is clear, simple,
>>>> and wrong." -- H.L. Mencken
>>>>  _______________________________________________
>>>> kwlug-disc mailing list
>>>> kwlug-disc at kwlug.org
>>>> http://kwlug.org/mailman/listinfo/kwlug-disc_kwlug.org
>>>>
>>>
>>> _______________________________________________
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>>>
>>>
>>
>>
>> --
>> Khalid M. Baheyeldin
>> 2bits.com, Inc.
>> Fast Reliable Drupal
>> Drupal optimization, development, customization and consulting.
>> Simplicity is prerequisite for reliability. --  Edsger W.Dijkstra
>> Simplicity is the ultimate sophistication. --   Leonardo da Vinci
>> For every complex problem, there is an answer that is clear, simple, and
>> wrong." -- H.L. Mencken
>>  _______________________________________________
>> kwlug-disc mailing list
>> kwlug-disc at kwlug.org
>> http://kwlug.org/mailman/listinfo/kwlug-disc_kwlug.org
>>
>
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> kwlug-disc at kwlug.org
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>
>


-- 
Khalid M. Baheyeldin
2bits.com, Inc.
Fast Reliable Drupal
Drupal optimization, development, customization and consulting.
Simplicity is prerequisite for reliability. --  Edsger W.Dijkstra
Simplicity is the ultimate sophistication. --   Leonardo da Vinci
For every complex problem, there is an answer that is clear, simple, and
wrong." -- H.L. Mencken
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