diff --git a/roles/compute-node/files/id_rsa b/roles/compute-node/files/id_rsa
deleted file mode 100644
index e4a3947..0000000
--- a/roles/compute-node/files/id_rsa
+++ /dev/null
@@ -1,27 +0,0 @@
------BEGIN RSA PRIVATE KEY-----
-MIIEpQIBAAKCAQEA4ixakIQFlpSXd3NJ98btbO7Dt0o9ioDl0ZLZa2v1g0dWifn0
-W5gkqo9VSkY2fPwUtgxnyoyVFiEc1MyLNxAkd6UHl+YzFw4dDCrEpu5XDCPCkvky
-dd2P3OiuxmheDqjpklPMWddsWSIA061qSdBQ+pYm9Qq5tfekvOVcAPPkoB22ftPr
-gnOSovvTwHfnZH/gfiI+IxUcWwLkneiUenw5oO+3Jie1Gbn3yFqf3pk+VG6M+8YH
-gZKY0/TBaFBHB+acKN3/yIhnnQzfwRyLX5txnYyaDI0HjVLJQiFK0XKgTGhm4U7C
-mpWkEH6WLF/cOs9+chQDDSwOxRD/VIw6W4sXIwIDAQABAoIBABhQFkg0uPkP7hxc
-G1Z0Xu931zgr1eO+qXXW6GJgz5qWH5pjcT4rY72l/NAoLhFPc9aCDOI8LIaddqD1
-f/2iUZk+90r/5vwSe1LkghFDy721VmRAP4lmEOH5bVhMvderlrgxI+WAf9gxDI+0
-s5lNuHbHj1aGGaKTBXV83mAH18rSUxxPZ+M5xT9RE5uKJwZcRLrqnOI3dleGy7xc
-Pxrtm0v/507DVjRdQzpjcYkndGQXfOqjNLEtwMADwmYCOEF3sqaSSDeqYtg/IOIR
-hiM65ekl7R+bqMaowv82V5NCfdSXKyRLvk4Nr9E9Jji9gPA2bYkx6ASkkWduGzA3
-tYqs5kkCgYEA9y396CV/NQfxGGwRD/lLtpNG/YgzihO+IojLd5RsdTCUxvxB5BCx
-i/KGWisg5PLORBh1UGpyrSIKaoMJXbrSSpQwZri+Xnpjt/qHIT8KWUN4tuiHKluV
-DkWQFkD1aOIZujWEX9J25C/SGICtyCIWp/ylNPX6Kwf/cm8W7A7GPU0CgYEA6j53
-dHW2ia4k0ze0HI0PWaiZoi2jFhzI33le1MMBjRMIS3TW2LajWB3TjFs+AdLb831P
-gQrA76oMQ5KDZ3o2b4NrixwfRAQaBBW2cCsRLkxZEIsoVa3QthT5UihqR/t6G6FB
-u9pl+fK8IsHoc5pKFtOkCD9c/Axyu0m30BWqLi8CgYEAjbEPm8Pi58NlsVpBbaa6
-gC5sw2kQIlau550DBclPYt42atqv6sym+lJMMeQHNzb4hpB+r1pV4mlhDy2OcOxn
-H9lS5Y+BkScXgp9aVvSMOh8zU6Z31RAqocO+lQMnqrfxh4ymFUfQX34KMYGSHOdt
-lV5+VZ2rin9LL43+1dKiUQECgYEAlOCQ4ZbzJjxlMU1lDwRkbjKnOplQ3vv6e3ZT
-XFx4fuZKzlJ7Po+N77I9Qya2mUgf/Xh2cGiaSXjFhKj5FWpqcKORVX/RK1SECHaY
-VmA48jkaHlajkxj+3ssjzyDas9dUO31ZHwDm8V5iTqD5kYfNcQagaZGEEroCraBj
-0EAEwocCgYEAmQ2RumGHjYdSgkxw1MWCAXg1RPBaifZifErhe1MiVkZuHdCxYn3p
-Yv7KPaOQtYfbZEN1Ww3ScWqIRZzOmRdEakFGFh+d1V+qK1r/Bj6SBSOND1UZFm+j
-+DeGwmHuPzdNbtoW4dqyFM5OFib3N9P6r87Kfl1X3q31R8gVhK4wtOo=
------END RSA PRIVATE KEY-----
diff --git a/roles/compute-node/files/id_rsa.pub b/roles/compute-node/files/id_rsa.pub
deleted file mode 100644
index 36daa90..0000000
--- a/roles/compute-node/files/id_rsa.pub
+++ /dev/null
@@ -1 +0,0 @@
-ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDiLFqQhAWWlJd3c0n3xu1s7sO3Sj2KgOXRktlra/WDR1aJ+fRbmCSqj1VKRjZ8/BS2DGfKjJUWIRzUzIs3ECR3pQeX5jMXDh0MKsSm7lcMI8KS+TJ13Y/c6K7GaF4OqOmSU8xZ12xZIgDTrWpJ0FD6lib1Crm196S85VwA8+SgHbZ+0+uCc5Ki+9PAd+dkf+B+Ij4jFRxbAuSd6JR6fDmg77cmJ7UZuffIWp/emT5Uboz7xgeBkpjT9MFoUEcH5pwo3f/IiGedDN/BHItfm3GdjJoMjQeNUslCIUrRcqBMaGbhTsKalaQQfpYsX9w6z35yFAMNLA7FEP9UjDpbixcj cord@cord.lab
diff --git a/roles/compute-node/files/remove-maas-components b/roles/compute-node/files/remove-maas-components
index 4d85694..5adf79e 100755
--- a/roles/compute-node/files/remove-maas-components
+++ b/roles/compute-node/files/remove-maas-components
@@ -1,10 +1,31 @@
 #!/bin/bash
 
-docker kill $(docker ps -q)
-docker rm -f $(docker ps -aq)
-docker rmi -f $(docker images -aq)
+KEEP_DOCKER=0
+DOCKER_ENGINE="docker-engine"
+DOCKER_REGISTRY="/docker-registry /docker-registry-mirror"
+CONTAINER_LIST=$(docker ps -qa)
 
-sudo apt-get remove --purge -y bind9 apache2 docker-engine ansible $(dpkg --get-selections | grep maas | cut -f1)
+while [ $# -gt 0 ]; do
+    case $1 in
+        -k|--keep-docker)
+            KEEP_DOCKER=1
+            DOCKER_ENGINE=
+            DOCKER_REGISTRY=
+	    CONTAINER_LIST=$(docker ps --format '{{.ID}} {{.Names}}' | grep -v ' registry$' | grep -v ' registry-mirror$' | awk '{print $1}')
+            ;;
+    esac
+    shift
+done
+
+CONTAINER_LIST=$(docker ps --format '{{.ID}} {{.Names}}' | grep -v ' registry$' | grep -v ' registry-mirror$' | awk '{print $1}')
+
+docker kill $CONTAINER_LIST
+docker rm -f $CONTAINER_LIST
+if [ $KEEP_DOCKER -eq 0 ]; then
+    docker rmi -f $(docker images -aq)
+fi
+
+sudo apt-get remove --purge -y bind9 apache2 $DOCKER_ENGINE ansible $(dpkg --get-selections | grep maas | cut -f1)
 
 sudo rm -rf \
     /etc/maas \
@@ -20,12 +41,10 @@
     /etc/apt/sources.list.d/ppa_maas_stable_trusty.list \
     /etc/apt/sources.list.d/ppa_ansible_ansible_trusty.list \
     /etc/network/if-pre-up.d/nat \
-    /docker-registry \
-    /docker-registry-mirror
+    $DOCKER_REGISTRY
 
 sudo apt-get update -y
 
 # remove NAT rules
 sudo iptables --table nat --delete POSTROUTING --out-interface eth3 -j MASQUERADE
 sudo iptables --delete FORWARD --in-interface mgmtbr -j ACCEPT
-
diff --git a/roles/compute-node/files/remove-xos-components b/roles/compute-node/files/remove-xos-components
index 1b6fc42..2f2cf07 100755
--- a/roles/compute-node/files/remove-xos-components
+++ b/roles/compute-node/files/remove-xos-components
@@ -19,6 +19,9 @@
 UVT=$(which uvt-kvm)
 test -z $UVT || uvt-kvm list | xargs uvt-kvm destroy
 
+LXC=$(which lxc)
+test -z $LXC || lxc delete --force $(lxc list | grep "^| [^ ]" | awk '{print $2}')
+
 sudo apt-get remove --purge -y $(dpkg --get-selections | grep "nagioas\|juju\|nova\|neutron" | awk '{print $1}') &&sudo apt-get autoremove -y && sudo rm -rf /etc/juju /etc/neutron /home/ubuntu/.juju && sudo find / -name "*juju*" -exec rm -r \{\} \; && sudo rm -f /var/lib/uvtool/libvirt/images/*
 
 OVS=$(which ovs-vsctl)