[Linux-cluster] fence ' node1' failed if etho down

[ESGLinux]

Hello,

As you say little purpose has a cluster configured that way...

As I need to test a cluster infraestructer I´m going to buy 2 IPMI Dell
cards (well, I´m going to suggest it ;-) )

or is it better to test another solution cheaper?

thanks for your help, you´ve opened my eyes in this problem,

ESG

2009/2/19 Stewart Walters <spods at iinet.net.au>

> For a time I was restricted in the hardware I could use for a cluster, and
> the
> hardware used in the two node cluster had the following fence devices:
>
> node1 = power fencing through IPMI
> node2 = manual fencing
>
> Whenever node1 was fenced by node2, node1 would power down as expected.
>
> Whenever node2 was fenced by node1, node1 would "manually fence" node2.
>
> What basically happens from there is CMAN on node1 detects that the node2
> is
> still participating in the cluster, and because it can't remove node2 from
> the
> cluster, node1 removes itself instead.  This is to stop damage to shared
> filesystems.
>
> But the impact on your user base is that you've just lost both nodes on the
> cluster until an admin manually intervenes - which serves little purpose
> when
> your trying to achieve a clustered high availability.
>
> Stewart
>
>
>
> On Thu Feb 19 16:39 , ESGLinux  sent:
>
> >Hello,
> >
> >I can promisse you that the cluster runs with fencing at all, ;-)
> >
> >But it runs in a way absolutelly impredectible.
> >
> >I´m using xen because I´m just testing different scenarios before put the
> cluster in a real production system, which is the final goal,
> >
> >
> >I am going to read the faqs you send me (the other link I´ve already read
> and it
> does not resolve my doubts, but I think because I didnt understand the
> problematic, now I´ll see... )
> >
> >All of this about fencing makes me wonder. If all fails, and a node is
> complety
> lost an its imposible to complete the fence process of it,
> >
> >what happens? In my actual situation without any fence, the cluster doesnt
> works
> at all.
> >
> >Greetings and thanks for the information,
> >
> >ESG
> >
> >
> >
> >
> >
> >
> >
> >--
> >
> >Linux-cluster mailing list
> >
> >Linux-cluster at redhat.com
> >
> >https://www.redhat.com/mailman/listinfo/linux-cluster
> >
> >
> >
>
>
>
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