Linux 上で高可用性クラスター ファイル システムを構成する方法

sudo apt-get install pacemaker corosync drbd8-utils gfs2-utils

sudo nano /etc/hosts

192.168.1.100    node1
192.168.1.101    node2

sudo nano /etc/corosync/corosync.conf

totem {
    version: 2
    secauth: off
    cluster_name: mycluster
    transport: udpu
}

nodelist {
    node {
        ring0_addr: node1
        nodeid: 1
    }
    node {
        ring0_addr: node2
        nodeid: 2
    }
}

quorum {
    provider: corosync_votequorum
}

logging {
    to_syslog: yes
    to_logfile: yes
    logfile: /var/log/corosync.log
    debug: off
    timestamp: on
}

sudo systemctl enable corosync
sudo systemctl enable pacemaker

sudo systemctl start corosync
sudo systemctl start pacemaker

sudo nano /etc/drbd.d/myresource.res

resource myresource {
    protocol C;

    on node1 {
        device /dev/drbd0;
        disk   /dev/sdb;
        address 192.168.1.100:7789;
        meta-disk internal;
    }

    on node2 {
        device /dev/drbd0;
        disk   /dev/sdb;
        address 192.168.1.101:7789;
        meta-disk internal;
    }

    net {
        allow-two-primaries;
    }

    startup {
        wfc-timeout     15;
        degr-wfc-timeout 60;
    }

    syncer {
        rate    100M;
        al-extents 257;
    }

    on-node-upgraded {
        # promote node1 to primary after a successful upgrade
        if [ "$(cat /proc/sys/kernel/osrelease)" != "$TW_AFTER_MAJOR.$TW_AFTER_MINOR.$TW_AFTER_UP" ] && 
           [ "$(cat /proc/mounts | grep $DRBD_DEVICE)" = "" ] ; then
            /usr/bin/logger "DRBD on-node-upgraded handler: Promoting to primary after upgrade.";
            /usr/sbin/drbdsetup $DRBD_DEVICE primary;
        fi;
    }
}

sudo drbdadm create-md myresource

sudo systemctl start drbd

sudo mkfs.gfs2 -p lock_gulmd -t mycluster:myresource /dev/drbd0

sudo mkdir /mnt/mycluster
sudo mount -t gfs2 /dev/drbd0 /mnt/mycluster

sudo pcs resource create myresource Filesystem device="/dev/drbd0" directory="/mnt/mycluster" fstype="gfs2"  op start  timeout="60s"  op stop  timeout="60s"  op monitor interval="10s"  op monitor timeout="20s"  op monitor start-delay="5s"  op monitor stop-delay="0s"

sudo pcs constraint order myresource-clone then start myresource
sudo pcs constraint colocation add myresource with myresource-clone

sudo pcs cluster stop node1

sudo pcs cluster start node1