Re: [ovirt-users] Adding FCP - Request for comments

----- Original Message ----- > From: "Daniel Helgenberger" <daniel.helgenberger(a)m-box.de&gt; > To: "Fábio Coelho" <fabio.coelho(a)jfsc.jus.br&gt;, "users" <Users(a)ovirt.org&gt; > Sent: Wednesday, May 20, 2015 8:46:01 PM > Subject: Re: [ovirt-users] Adding FCP - Request for comments > > > > On 20.05.2015 19:10, Fábio Coelho wrote: > Hello Fabio, >> Thoughts about Adding Storage Luns >> >> As I am new here, I would appreciate some advice about some actions that I >> intend to perform, please read. >> >> I have added a LUN to my cluster and, for that task, I had to restart every >> node >> of it. There was no LUNs before, multipathd was stopped and multipath.conf >> inexisted. I was able to log in and manually configure multipath.conf, a >> simple >> multipathd start was not enough. > In theory this should have been enough. What puzzles me: Until now > host-deploy always activated multipathd and writes a multipath.conf. > > Here I strongly recommend to blacklist everything and then only white > listing your vendors. Otherwise your error logs fill up and you cannot > connect any USB stick to the host any more ;) > > Then, add RHEV PRIVATE to the second line otherwise it will be > overwritten on every host deploy run. > # RHEV PRIVATE > > blacklist { > device { > vendor "*" > product "*" > } > } This is bad idea. If you want to blacklist all devices, you can add this to vdsm generated configuration.

Vdsm is depending on the defaults set in the "defaults" section.

> > > > After activating multipathd and editing multipath.conf to your needs you > would actually need to run the 'multipath' command to create the paths. [1] > > Sometimes you need to rescan the LUNs, though, esp. if you changed sizes > after activating them. >> >> If this wasn't enough, my double NetAPP ( through an Hitachi ) provided me >> with >> a not so empty brand new LUN, and the task to add the FCP failed to point >> this. >> Trusting my double, I spent some precious time searching for different >> problems, >> until receiving some guidance and do a simple dd if=/dev/zero to the >> initial >> blocks of the LUN. > IMHO you need to initialize the lun with a partition table at least > (parted). dd will do also. > >> >> Consulting the documentation >> ( http://www.ovirt.org/OVirt_Administration_Guide#Adding_FCP_Storage ) for >> this >> matters, was not of any help. >> >> So, my questions: >> >> This is the intended behavior? Should I open a ticket? >> >> Should I add a note to documentation to point such behavior? ( i'm about to >> ) >> > I think this is not ovirts part but rather dm-multipath. My best guess > would be a configuration error on your part? > > [1] > https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/6/... >> >> Cheers, >> >> by qoelheX >> >> >> Aviso Legal >> >> A informação contida neste e-mail e em seus anexos pode ser restrita, sendo >> o >> emitente deste responsável por seu conteúdo e endereçamento. Se você não >> for a >> pessoa autorizada a receber esta mensagem e tendo recebido a mesma por >> engano, >> favor apagá-la imediatamente. A JFSC considera opiniões, conclusões e >> outras >> informações não oficiais de responsabilidade do usuário deste serviço. >> > > -- > Daniel Helgenberger > m box bewegtbild GmbH > > P: +49/30/2408781-22 > F: +49/30/2408781-10 > > ACKERSTR. 19 > D-10115 BERLIN > > > www.m-box.de www.monkeymen.tv > > Geschäftsführer: Martin Retschitzegger / Michaela Göllner > Handeslregister: Amtsgericht Charlottenburg / HRB 112767 > _______________________________________________ > Users mailing list > Users(a)ovirt.org > http://lists.ovirt.org/mailman/listinfo/users >