[pve-devel] Plans to Soft Fence

[Cesar Peschiera]

I would like to correct the command that should be applied:
/usr/sbin/fence_ack_manual <ip address or name of the node that was power 
off manually>

Also tell you them that the "rgmanager" service is necessary, fence join, and 
"failover domain" can be necessary if you have more of two nodes.

  ----- Original Message ----- 
  From: Cesar Peschiera 
  To: Gilberto Nunes ; pve-devel at pve.proxmox.com 
  Sent: Friday, December 26, 2014 6:39 PM
  Subject: Re: [pve-devel] Plans to Soft Fence


  @Gilberto:
  First that all, please post the messages to the pve-devel mailing list, so all people can read and correct anything that to be wrong said.

  Moreover, i do of this mode and order:

  1) I wait that a node has some kind of problem
  2) I analyze the problem (for example, maybe be a problem with some card)
  3) If the problem is serious,  i manually disconnect  the electric energy of the node with problems
  4) From some node that is alive, i execute manually:
  /usr/sbin/fence_ack_manual <ip address or name of the node>


  5) Enjoy of HA

  Notes:
  A) I prefer this mode because will be possible to analyze the problem patiently before of apply the manual fence. Also we must consider that if we don't have a fence device by Hardware, any other option is dangerous and the security of your information will be very committed.
  B) Also is possible to apply a bash-script in the crontab for get a automatic mode, but i know that it is very dangerous, and i don't want have it.


    ----- Original Message ----- 
    From: Gilberto Nunes 
    To: Cesar Peschiera 
    Sent: Friday, December 26, 2014 5:51 PM
    Subject: Re: [pve-devel] Plans to Soft Fence


    Hi Cesar


    Do you know how can I trigger fence_ack automatically??

    Same sort of shell scripts... Whatever...



    2014-12-26 18:05 GMT-02:00 Cesar Peschiera <brain at click.com.py>:

      Also remember that "fence_ack_manual" is available, that it is a soft fence,
      it don't need a hardware of fence device, and only works when we don't have
      network communication with the node that have some kind of problem.

      ----- Original Message ----- From: "Dietmar Maurer" <dietmar at proxmox.com>
      To: "Gilberto Nunes" <gilberto.nunes32 at gmail.com>
      Cc: <pve-devel at pve.proxmox.com>
      Sent: Friday, December 26, 2014 3:33 PM
      Subject: Re: [pve-devel] Plans to Soft Fence



          fence_pve?? I can't found out such fence here... Perhaps I miss some
          packet?
          Where can I found it??


        That is only in newest version from git. But again, this is not suitable
        for
        real fencing.


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    Gilberto Ferreira
    (47) 9676-7530


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