Re: How to shutdown a node properly ?

Gandalf Corvotempesta <gandalf.corvotempesta@xxxxxxxxx> · Fri, 30 Jun 2017 09:23:39 +0200

Yes but why killing gluster notifies all clients and a graceful shutdown don't?I think this is a bug, if I'm shutting down a server, it's obvious that all clients should stop to connect to it....

Il 30 giu 2017 3:24 AM, "Ravishankar N" <ravishankar@xxxxxxxxxx> ha scritto:

    On 06/30/2017 12:40 AM, Renaud Fortier
      wrote:

        On
            my nodes, when i use the system.d script to kill gluster
            (service glusterfs-server stop) only glusterd is killed.
            Then I guess the shutdown doesn’t kill everything !

    Killing glusterd does not kill other gluster processes.

    When you shutdown a node, everything obviously gets killed but the
    client does not get notified immediately that the brick went down,
    leading for it to wait for the 42 second ping-timeout after which it
    assumes the brick is down. When you kill the brick manually before
    shutdown, the client immediate  receives the notification and you
    don't see the hang. See Xavi's description in Bug 1054694.

    So if it is a planned shutdown or reboot, it is better to kill the
    gluster processes before shutting the node down. BTW, you can use
https://github.com/gluster/glusterfs/blob/master/extras/stop-all-gluster-processes.sh
    which automatically checks for pending heals etc before killing the
    gluster processes.

    -Ravi

        De : Gandalf Corvotempesta
            [mailto:gandalf.corvotempesta@gmail.com]

            Envoyé : 29 juin 2017 13:41

            À : Ravishankar N <ravishankar@xxxxxxxxxx>

            Cc : gluster-users@xxxxxxxxxxx; Renaud Fortier
            <Renaud.Fortier@fsaa.ulaval.ca>

            Objet : Re:  How to shutdown a node
            properly ?

          Init.d/system.d script doesn't kill
            gluster automatically on reboot/shutdown?

            Il 29 giu 2017 5:16 PM, "Ravishankar N"
              <ravishankar@xxxxxxxxxx>
              ha scritto:

                  On 06/29/2017 08:31 PM, Renaud
                    Fortier wrote:

                    Hi,
                    Everytime
                      I shutdown a node, I lost access (from clients) to
                      the volumes for 42 seconds (network.ping-timeout).
                      Is there a special way to shutdown a node to keep
                      the access to the volumes without interruption ?
                      Currently, I use the ‘shutdown’ or ‘reboot’
                      command.

                `killall
                    glusterfs glusterfsd glusterd` before issuing
                    shutdown or reboot. If it is a replica or EC volume,
                    ensure that there are no pending heals before
                    bringing down a node. i.e. `gluster volume heal
                    volname info` should show 0 entries.

                    My
                      setup is :
                    -4
                      gluster 3.10.3 nodes on debian 8 (jessie)
                    -3
                      volumes Distributed-Replicate 2 X 2 = 4

                    Thank
                      you
                    Renaud

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