Re: Network Interface Card

Hello,

Many thanks for your response Johnray.

Now, I got a second NIC and I configured my LVS/Piranha quite correctly :

I have one real server connected to the piranha router, via a private network.

The router is connected to the public net via a hub. I did all the setting
correctly
as mentionned in http://peterbaitz.com/pbs_howto.txt.  However, executing
the rc.local file, I have the following response :

> setsockopt failed: Invalid argument

when the command :

> ipvsadm -A -t 194.190.208.16:80 -s rr

of the rc.lvs file is executed.

Have anyone a hint about the problem please ?

Many thanks in advance.

Mustapha



Johnray Fuller a écrit :

> Hello,
>
> Here are some points worth making in regards to this setup.
>
> 1> Using the same NIC for the internal and external interface
>    is possible if the clustered servers and the Internet are
>    connected via the same hub or switch or if you are using
>    ip-tunneling.
>
> 2> This is an inefficient way of setting up a cluster.
>    All the virtual servers are exposed to the Internet,
>    unless the hub itself is behind a firewall (and if the
>    firewall is a Linux box, it *will* need two NICs).
>
>    The system can handle more network load if you use two
>    NICs and a private hub for the back-end. Without the
>    dedicated back-end, you are losing performance,
>    especially if you are using ip-masq.
>
>    By not isolating the real servers, you expose them to
>    possible direct contact. This may or may not matter to
>    you depending on your network structure.
>
> 3> It may be important to manually assign the interfaces
>    instead of using DHCP if you are not behind a firewall for
>    security purposes.
>
>    Also, you need static addresses for the all machines
>    involved (since they are part of the piranha
>    configuration). If you must use DHCP, you will need to
>    configure the DHCP server to serve static addresses to
>    your clustered machines. This is commonly done by
>    assigning IP addresses based on the MAC address of the
>    DHCP client machines.
>
>    Additionally, the virtual ip addresses *cannot* be served.
>    They are statically entered in the Piranha configuration,
>    and you need to be sure that the addresses you use for
>    this will not be given to any other machines.
>
>    If you are not behind a firewall, it is highly
>    recommended you get behind one.
>
> I would say that for testing purposes, you should be able to use one NIC
> for both the public and private interfaces. It is
> not, however, a recommended configuration--especially
> for a production environment.
>
> Hope that helps,
>
> Johnray
>
> NOTE: Special thanks to Mike McLean for his feedback on this response.
>
> On Mon, 9 Sep 2002, Mustapha Hadim wrote:
>
> > Dear all,
> >
> > I am sending again my question about NIC.
> >
> > I am  setting up a Piranha LVS cluster following the method
> > deschribed in http://peterbaitz.com/pbs_howto.txt. I have a
> > little question  please :
> >
> > Can I use the same Network Interface Card for the private and public
> > network, with several eth interfaces declared in RD 7.3 ?
> >
> > Indeed, I have configured four ethernet interfaces ethi (for i=1 .. 4)
> > in the network configuration window of RD 7.3. I have used the
> > dhcp protocol to get two IP adresses for two ethi of the public
> > network, and I assigned two private IP adresses for two ethi of
> > the private network. I am using one NIC, and I don't know weither
> > this will work, or need I a second NIC; i.e., one for the private network
> > and the other for the public one ?
> >
> > Could we have a hint please ?
> >
> > Many thanks in advance,
> >
> > Mustapha
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> > _______________________________________________
> > Piranha-list mailing list
> > [email protected]
> > https://listman.redhat.com/mailman/listinfo/piranha-list
> >
>
> --
> J-ray
>                                            \|/
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>
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