Update teardown script to new setup

bin/teardown.sh

@@ -2,8 +2,9 @@
 
 TOP="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )/.."
 
+reboot=yes
 case $1 in
-    --reboot) reboot=1; shift ;;
+    --no-reboot) reboot=no; shift ;;
 esac
 
 if [ $# != 1 ]; then
@@ -12,15 +13,17 @@ if [ $# != 1 ]; then
 fi
 
 d=$1
-f=$TOP/clusters/$d/.$d.$$
+tmp=$TOP/clusters/$d/.$d.$$
 
 teardown () {
-    sed -s 's/cluster.\(apiserver\|worker\)/cluster.host/' $TOP/clusters/$d/default.nix > $f
-    nixops modify -d $d $f
+    sed '/k8s *= *{/,+1 s/enable *= *true/enable = false/' \
+        $TOP/clusters/$d/default.nix > $tmp
+    nixops modify -d $d $tmp
     nixops deploy -d $d
-    [ ! -z $reboot ] && nixops reboot -d $d
-    nixops ssh-for-each -d $d "rm -rf /var/run/kubernetes /var/lib/kubernetes /var/lib/etcd /var/lib/kubelet /var/lib/cfssl"
-    rm $f
+    [ $reboot = yes] && nixops reboot -d $d
+    nixops ssh-for-each -d $d \
+        "rm -rf /var/run/kubernetes /var/lib/kubernetes /var/lib/etcd /var/lib/kubelet /var/lib/cfssl"
+    rm $tmp
 }
 cat << EOF