keepalived+drbd sample

check_drbd.sh

#!/bin/bash

EXIT_CODE=0

STATUS_FILE=/tmp/drbd.status

STATUS=$(sed -e 's/.* state:\(.*\)$/\1/' $STATUS_FILE)
if [ "${STATUS}" != "MASTER" ]; then
        echo "current status is ${STATUS}. skip"
        exit
fi

DRBD_ROLE_STATUS=$(/sbin/drbdadm role r0 | cut -d '/' -f1)
DRBD_DSTATE_STATUS=$(/sbin/drbdadm dstate r0 | cut -d '/' -f1)
DRBD_CSTATE_STATUS=$(/sbin/drbdadm cstate r0)

[ "${DRBD_ROLE_STATUS}" != "Primary" ] && EXIT_CODE=1
#[ "${DRBD_DSTATE_STATUS}" != "UpToDate" ] && EXIT_CODE=2
#[ "${DRBD_CSTATE_STATUS}" != "Connected" ] && EXIT_CODE=3

echo "$(date +'%Y/%m/%d %H:%M:%S') check_drbd role:${DRBD_ROLE_STATUS} dstate:${DRBD_DSTATE_STATUS} cstate:${DRBD_CSTATE_STATUS} exit:${EXIT_CODE}" >> /tmp/check_drbd.log

exit $EXIT_CODE

ctrl_drbd.sh

#!/bin/bash

TYPE=$1   # “MASTER or BACKUP

DEVICE=/dev/drbd0
MOUNT_DIR=/drbd

drbd_primary() {
        drbdadm primary r0
        mount | grep -q $DEVICE
        [ $? = 1 ] && mount -t xfs $DEVICE $MOUNT_DIR
}

drbd_secondary() {
        mount | grep -q $DEVICE
        [ $? = 0 ] && umount $MOUNT_DIR
        drbdadm secondary r0
}

case $TYPE in
        "MASTER")
                drbd_primary
                exit 0
                ;;
        "BACKUP")
                drbd_secondary
                exit 0
                ;;
        *)      echo "unknown state"
                exit 1
                ;;
esac

save_drbd_status.sh

#!/bin/bash

TYPE=$1   # “GROUP” or “INSTANCE”
NAME=$2   # name of group or instance
STATE=$3  # target state of transition (“MASTER”, “BACKUP”, “FAULT”)

echo "$(date +'%Y/%m/%d %H:%M:%S') type:${TYPE} name:${NAME} state:${STATE}" > /tmp/drbd.status