backup restore prototype

break-etcd-restore-capv.sh

################ DO NOT RUN THIS SCRIPT EVERR IT WILL BREAK YOUR CLUSTER !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
### TODO, read in these parameters...
management_nodes=( "10.92.6.140" )

function backup_etcd {
        echo "killing etcd"
        for node in ${management_nodes[@]}; do
                # ssh capv@${t} systemctl stop kubelet
                echo "backup etcd to etcd_backup directory"
                ssh capv@$node "sudo rm -rf etcd_backup ; sudo mkdir etcd_backup"
                ssh capv@$node "sudo cp -r /var/lib/etcd/ etcd_backup"
                echo "done, size =="
                ssh capv@$node "sudo du --summarize --human-readable etcd_backup"
        done
}

function kill_etcd {

        for node in ${management_nodes[@]}; do
                # another backup just to be careful
                folder=`date +"%s"`
                echo "wiping out etcd data !!!!!!!!!!"
                ssh capv@$node "mkdir -p etcd_backup/$folder ; pushd etcd_backup/$folder ;  kill `ps -ax | grep etcd | grep peer  | cut -d' ' -f 1` ; mv /var/lib/etcd/ ."
                popd
        done
}


function snapshot_etcd {
        rm jay.db
        for node in ${management_nodes[@]}; do
                 ssh capv@$node "pushd etcd_backup/ ; rm jay.db ; sudo /usr/bin/etcdctl --endipoints='https://localhost:2379' --cacert='/etc/kubernetes/pki/etcd/ca.crt' --cert='/etc/kubernetes/pki/etcd/server.crt' --key='/etc/kubernetes/pki/etcd/server.key' snapshot save jay.db"
                 ssh capv@$node "pushd etcd_backup/ ; ls -altrh jay.db"
        done
}

function restore_etcd {

   # TODO do this for all nodes in a for loop
   # only do this on one node

   for node in ${nodes[@]}; do
        ssh capv@$node ls m1* ; rm -rf m1* ; echo "removed the m1 files..."
        ssh capv@$node ETCDCTL_API=3 etcdctl snapshot restore jay.db --name m1 --initial-cluster m1=https://${node}:2380 --initial-cluster-token etcd-cluster-1 --initial-advertise-peer-urls=https://${node}:2380 ;
   done
}

snapshot_etcd
#backup_etcd
#kill_etcd
#wait_for_k8s_to_die
#restore_etcd
#wait_for_k8s_to_come_back