Open Stack

 Hi Aaron!

 Once again I 'd like to thank you a lot for the time spending with me.

 I totally understand what you are saying that I should do but as you 
 have guessed there is a problem. The problem is that the Datacenter 
 informed me that it's not possible to change the cabling and connect the 
 192.* network NICs to the 133.* switch. The say that whatever is on the 
 internal network is devoted for this purpose only and cannot have 
 "internal" network connections on the external switch. Furthermore the 
 internal network connection is a 10Gbit while the connection for the 
 external one is 1Gbit (between the server and the switch) and we would 
 like to use the 10Gbit bandwidth for all internal communications of 
 OpenStack.


 Do you think that there is a solution given the above limitations?

 I have seen something similar somewhere (not really remember 
 where)....My thoughts are that I can have the external IP address setup 
 on one NIC and leave unnumbered the internal NIC. I can then create a 
 bridge attached to the internal NIC and this bridge can have the 
 internal IP so that the physical machines can communicate throughout the 
 internal network. Then all guest machines will communicate to the outer 
 world through the external NIC. Do you see any restrictions or problem 
 on this setup?

 In case that you have something better to suggest I am open to 
 suggestions.


 All the best,

 George


 On Thu, 20 Nov 2014 16:57:56 +0000, Aaron Segura wrote:
> Excellent!
>
> Youre going to want to remove the 192.* addresses and make sure both
> NICs are cabled to the same layer-2 network.  One NIC will have your
> 133.* address (host management and API access), and one will be
> completely unnumbered (VM traffic).
>
> So, if you have your 133.* NIC plugged in to one switch, and your
> 192.* NIC plugged into another, just move the cables from the 192.*
> switch and plug them in to the 133.* switch.  This is a very
> rudimentary explanation that doesnt account for any fancy network
> topology on your side, so, depending on the specific configs on your
> switches, it *may* not be as simple as that in your environment.  The
> end-goal is that you want both of your NICs to be able to talk on the
> same network, but only one of them has an address.
>
> Does that clear things up?
>
> On Thu Nov 20 2014 at 2:53:50 AM Georgios Dimitrakakis  wrote:
>
>>  Yes!
>>
>>  I am planning to assign 133.* IP addresses to all guest
>> instances.
>>
>>  Best,
>>
>>  George
>>
>>  On Thu, 20 Nov 2014 02:42:08 +0000, Aaron Segura wrote:
>> > Okay, I believe I see what youre going for now.  Are you
>> planning on
>> > assigning 133.* addresses directly to your guest instances? 
>> >
>> > On Wed Nov 19 2014 at 5:53:36 PM Dimitrakakis Georgios  wrote:
>> >
>> >> Sorry about the confusion!
>> >>
>> >> I have two nodes, with two network interfaces each. One
>> configured
>> >> with 192.* IP and one with 133.*
>> >> I can access them with SSH directly at 133.*
>> >>
>> >> Both nodes can ping one another and both nodes can ping Internet
>> >> addresses e.g.  google. com
>> >>
>> >> No other router available for configuration.
>> >> No openstack yet.
>> >>
>> >> So, my question is the following :
>> >>
>> >> If I want to install openstack should I modify the external
>> network
>> >> interface so that it doesnt have an IP address?  If I do that
>> how
>> >> can I access the server then?
>> >>
>> >> I was under the impression that the document was talking about a
>> >> situation like the above when it clearly doesnt. Thats why I am
>> >> looking for new guidelines.
>> >>
>> >> All the best,
>> >>
>> >> George
>> >>
>> >> ---- Ο χρήστης Aaron Segura έγραψε ----
>> >>
>> >> Im not sure I understand.  Are you able to ping from your nodes
>> out
>> >> to the internet at all?
>> >>
>> >> On Wed Nov 19 2014 at 3:29:54 PM Georgios Dimitrakakis wrote:
>> >>
>> >>>  Aaron it helps a lot and thank you for that.
>> >>>
>> >>>  Unfortunately in my setup there is no router for the
>> management
>> >>>  interface since it is much simpler and has two interfaces:
>> one
>> >>> that has
>> >>>  an external IP and connects directly to the internet and a
>> >>> second one
>> >>>  with internal (management) network that cannot be reached
>> from
>> >>> the
>> >>>  outside. In such a case can you recommend a setup or point me
>> >>> at a
>> >>>  documentation?
>> >>>
>> >>>  Thanks a lot again,
>> >>>
>> >>>  George
>> >>>
>> >>>  On Wed, 19 Nov 2014 20:39:10 +0000, Aaron Segura wrote:
>> >>> > When the documentation refers to testing external
>> connectivity
>> >>> from
>> >>> > the nodes, it does not mean to test connectivity via the
>> >>> External
>> >>> > Interface, irself.  It means that you should be able to
>> reach
>> >>> the
>> >>> > external network (Internet) and the other nodes, from each
>> >>> node, via
>> >>> > the Management Interface.  The Management Interface is how
>> you
>> >>> will
>> >>> > log in to the nodes via SSH, as well.  The network attached
>> to
>> >>> your
>> >>> > Management Interface should have a route out to the Internet
>> >>> and
>> >>> > provide all the connectivity you need to manage the node,
>> >>> install
>> >>> > software, etc...
>> >>> >
>> >>> > Hope that helps!
>> >>> >
>> >>> > On Wed Nov 19 2014 at 2:19:07 PM Georgios Dimitrakakis 
>> wrote:
>> >>> >
>> >>> >>  First of all let me thank you very much for your clear
>> >>> replies!
>> >>> >>
>> >>> >>  Yes! That makes sense indeed for the Virtual Machines!
>> >>> >>
>> >>> >>  What about the compute node itself? If I am not wrong at
>> >>> that
>> >>> >> point of
>> >>> >>  documentation nova-network hasnt been installed or
>> >>> configured. So
>> >>> >> how
>> >>> >>  is it possible the connectivity tests with the external
>> >>> network
>> >>> >> to be
>> >>> >>  successful as shown at that point?
>> >>> >>
>> >>> >>  Furthermore if someone wants to have direct SSH access to
>> >>> the
>> >>> >> node from
>> >>> >>  the external network how is that achieved? In general how
>> >>> does
>> >>> >> the
>> >>> >>  physical node itself access the external network?
>> >>> >>
>> >>> >>  All the best,
>> >>> >>
>> >>> >>  George
>> >>> >>
>> >>> >>  On Wed, 19 Nov 2014 14:25:29 +0000, Aaron Segura wrote:
>> >>> >> > Think of your external interface as if it were a switch.
>> The
>> >>> >> guests
>> >>> >> > are plugged in to the switch. They will have IP addresses
>> >>> that
>> >>> >> allow
>> >>> >> > them to communicate on the network. The physical interface
>> >>> just
>> >>> >> ships
>> >>> >> > packets back and forth between physical and virtual
>> >>> networks, and
>> >>> >> > doesnt need its own address. Make more sense?
>> >>> >> >
>> >>> >> > On Wed, Nov 19, 2014, 07:53 Georgios Dimitrakakis 
>> wrote:
>> >>> >> >
>> >>> >> >>  Hello stackers!
>> >>> >> >>
>> >>> >> >>  In OpenStack documentation and specifically on Legacy
>> >>> >> Networking
>> >>> >> >>
>> >>> >> >>
>> >>> >> >
>> >>> >> >
>> >>> >>
>> >>> >
>> >>> >
>> >>>
>> >>
>> >
>> >
>>
> 
>  http://docs.openstack.org/juno/install-guide/install/yum/content/ch_basic_environment.html#basics-networking-nova
>> [1]
>> >>> [1]
>> >>> >> [1]
>> >>> >> >> [1]
>> >>> >> >>
>> >>> >> >>  says clearly that for a two node installation the
>> >>> interface
>> >>> >> >> dedicated
>> >>> >> >>  to the external network should not be configured with
>> an
>> >>> IP
>> >>> >> >> address.
>> >>> >> >>
>> >>> >> >>  Is this correct??
>> >>> >> >>
>> >>> >> >>  Furthermore at the "Verify Connectivity" part is
>> pinging
>> >>> >> >> successfully
>> >>> >> >>  on the external network and my question is how is this
>> >>> >> happening?
>> >>> >> >> Does
>> >>> >> >>  it assume that there is a third interface already
>> >>> connected on
>> >>> >> >> the
>> >>> >> >>  external network??
>> >>> >> >>
>> >>> >> >>  How is accessing the external network without even
>> >>> configuring
>> >>> >> >> the
>> >>> >> >>  interface dedicated at it?? Does it assume that the
>> >>> internal
>> >>> >> >> network
>> >>> >> >>  somehow performs a routing??
>> >>> >> >>
>> >>> >> >>  Best regards,
>> >>> >> >>
>> >>> >> >>  G.
>> >>> >> >>
>> >>> >> >> _______________________________________________
>> >>> >> >> Mailing list:
>> >>> >> >>
>> >>> http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack
>> [2] [2]
>> >>> >> [2] [2]
>> >>> >> >> Post to     : openstack at lists.openstack.org [3] [3]
>> [3] [3]
>> >>> >> >> Unsubscribe :
>> >>> >> >>
>> >>> http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack
>> [4] [4]
>> >>> >> [4] [4]
>> >>> >> >
>> >>> >> >
>> >>> >> > Links:
>> >>> >> > ------
>> >>> >> > [1]
>> >>> >> >
>> >>> >> >
>> >>> >>
>> >>> >
>> >>> >
>> >>>
>> >>
>> >
>> >
>>
> 
> http://docs.openstack.org/juno/install-guide/install/yum/content/ch_basic_environment.html#basics-networking-nova
>> [5]
>> >>> [5]
>> >>> >> [5]
>> >>> >> > [2]
>> >>> http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack
>> [6] [6]
>> >>> >> [6]
>> >>> >> > [3] mailto:openstack at lists.openstack.org [7] [7] [7]
>> >>> >> > [4]
>> >>> http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack
>> [8] [8]
>> >>> >> [8]
>> >>> >> > [5] mailto:giorgis at acmac.uoc.gr [9] [9] [9]
>> >>> >
>> >>> >
>> >>> > Links:
>> >>> > ------
>> >>> > [1]
>> >>> >
>> >>> >
>> >>>
>> >>
>> >
>> >
>>
> 
> http://docs.openstack.org/juno/install-guide/install/yum/content/ch_basic_environment.html#basics-networking-nova
>> [10]
>> >>> [10]
>> >>> > [2]
>> >>> http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack
>> [11] [11]
>> >>> > [3] mailto:openstack at lists.openstack.org [12] [12]
>> >>> > [4]
>> >>> http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack
>> [13] [13]
>> >>> > [5]
>> >>> >
>> >>> >
>> >>>
>> >>
>> >
>> >
>>
> 
> http://docs.openstack.org/juno/install-guide/install/yum/content/ch_basic_environment.html#basics-networking-nova
>> [14]
>> >>> [14]
>> >>> > [6]
>> >>> http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack
>> [15] [15]
>> >>> > [7] mailto:openstack at lists.openstack.org [16] [16]
>> >>> > [8]
>> >>> http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack
>> [17] [17]
>> >>> > [9] mailto:giorgis at acmac.uoc.gr [18] [18]
>> >>> > [10] mailto:giorgis at acmac.uoc.gr [19] [19]
>> >>
>> >>> --
>> >
>> >
>> > Links:
>> > ------
>> > [1]
>> >
>> >
>>
> 
> http://docs.openstack.org/juno/install-guide/install/yum/content/ch_basic_environment.html#basics-networking-nova
>> [20]
>> > [2] http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack
>> [21]
>> > [3] mailto:openstack at lists.openstack.org [22]
>> > [4] http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack
>> [23]
>> > [5]
>> >
>> >
>>
> 
> http://docs.openstack.org/juno/install-guide/install/yum/content/ch_basic_environment.html#basics-networking-nova
>> [24]
>> > [6] http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack
>> [25]
>> > [7] mailto:openstack at lists.openstack.org [26]
>> > [8] http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack
>> [27]
>> > [9] mailto:giorgis at acmac.uoc.gr [28]
>> > [10]
>> >
>> >
>>
> 
> http://docs.openstack.org/juno/install-guide/install/yum/content/ch_basic_environment.html#basics-networking-nova
>> [29]
>> > [11]
>> http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack [30]
>> > [12] mailto:openstack at lists.openstack.org [31]
>> > [13]
>> http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack [32]
>> > [14]
>> >
>> >
>>
> 
> http://docs.openstack.org/juno/install-guide/install/yum/content/ch_basic_environment.html#basics-networking-nova
>> [33]
>> > [15]
>> http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack [34]
>> > [16] mailto:openstack at lists.openstack.org [35]
>> > [17]
>> http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack [36]
>> > [18] mailto:giorgis at acmac.uoc.gr [37]
>> > [19] mailto:giorgis at acmac.uoc.gr [38]
>> > [20] mailto:giorgis at acmac.uoc.gr [39]
>> > [21] mailto:giorgis at acmac.uoc.gr [40]
>
>
> Links:
> ------
> [1]
> 
> http://docs.openstack.org/juno/install-guide/install/yum/content/ch_basic_environment.html#basics-networking-nova
> [2] http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack
> [3] mailto:openstack at lists.openstack.org
> [4] http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack
> [5]
> 
> http://docs.openstack.org/juno/install-guide/install/yum/content/ch_basic_environment.html#basics-networking-nova
> [6] http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack
> [7] mailto:openstack at lists.openstack.org
> [8] http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack
> [9] mailto:giorgis at acmac.uoc.gr
> [10]
> 
> http://docs.openstack.org/juno/install-guide/install/yum/content/ch_basic_environment.html#basics-networking-nova
> [11] http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack
> [12] mailto:openstack at lists.openstack.org
> [13] http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack
> [14]
> 
> http://docs.openstack.org/juno/install-guide/install/yum/content/ch_basic_environment.html#basics-networking-nova
> [15] http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack
> [16] mailto:openstack at lists.openstack.org
> [17] http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack
> [18] mailto:giorgis at acmac.uoc.gr
> [19] mailto:giorgis at acmac.uoc.gr
> [20]
> 
> http://docs.openstack.org/juno/install-guide/install/yum/content/ch_basic_environment.html#basics-networking-nova
> [21] http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack
> [22] mailto:openstack at lists.openstack.org
> [23] http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack
> [24]
> 
> http://docs.openstack.org/juno/install-guide/install/yum/content/ch_basic_environment.html#basics-networking-nova
> [25] http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack
> [26] mailto:openstack at lists.openstack.org
> [27] http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack
> [28] mailto:giorgis at acmac.uoc.gr
> [29]
> 
> http://docs.openstack.org/juno/install-guide/install/yum/content/ch_basic_environment.html#basics-networking-nova
> [30] http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack
> [31] mailto:openstack at lists.openstack.org
> [32] http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack
> [33]
> 
> http://docs.openstack.org/juno/install-guide/install/yum/content/ch_basic_environment.html#basics-networking-nova
> [34] http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack
> [35] mailto:openstack at lists.openstack.org
> [36] http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack
> [37] mailto:giorgis at acmac.uoc.gr
> [38] mailto:giorgis at acmac.uoc.gr
> [39] mailto:giorgis at acmac.uoc.gr
> [40] mailto:giorgis at acmac.uoc.gr
> [41] mailto:giorgis at acmac.uoc.gr