rolling-restart.sh

gistfile1.txt

#!/bin/bash

echo "Starting reboot sequence: $*"
echo ""
thisHost=False
user=root
if [ "$*" != "" ]
then
        for i in $*
        do
                eval=0
                if [ "`hostname -a`" == "$i" ] || [ "`hostname -f`" == "$i" ]
                then
                        thisHost=True
                else
                        echo -n "Rebooting $i"
                        ssh $user@$i reboot  >/dev/null 2>&1
                        if [ "$?" == "0" ]
                        then
                                up=False
                        else
                                up=True
                        fi
                        for null in {0..7}
                        do
                                echo -n "."
                                sleep 2
                        done
                        p=1
                        while [ "$p" != "0" ]
                        do
                                #echo nc $i 22 -w 1
                                nc $i 22 -w 1 >/dev/null
                                p=$?
                                echo -n "."
                                sleep 5
                        done
                        echo "...$i is back up, moving to next host."
                fi
        done

        if [ "$thisHost" == "True" ]
        then
                echo "Preparing to reboot this host"
                echo "^C to cancel reboot"
                for i in {15..0}
                do
                        echo -n "$i "
                        sleep 1
                done
                reboot
        fi
else
        echo "No host(s) given"
fi