From 1a56b106ca816ed8541b88775ec1d4a5fb97c280 Mon Sep 17 00:00:00 2001
From: Roger Luethi <rl@patchworkscience.org>
Date: Tue, 23 Sep 2014 13:24:28 +0200
Subject: [PATCH] labs: CirrOS image: check md5sum; URL in config/openstack

Copy the CirrOS image to the base disk even if the IMG_DIR is shared
with the host computer (the image in IMG_DIR remains as a cache).

Check md5sum for CirrOS image after copying it to the base disk.

CIRROS_URL is now stored in config/openstack to allow CirrOS version
upates in one location.

Change-Id: If0cf35d3806e3478875c5cceeaceca683fe1a58e
---
 labs/config/openstack            |  3 +++
 labs/scripts/apt_pre-download.sh | 32 ++++++++++++++++++++++++++++----
 labs/scripts/setup_glance.sh     |  2 +-
 3 files changed, 32 insertions(+), 5 deletions(-)

diff --git a/labs/config/openstack b/labs/config/openstack
index 1070668c..704afcff 100644
--- a/labs/config/openstack
+++ b/labs/config/openstack
@@ -4,6 +4,9 @@
 # one of: folsom, grizzly, havana, icehouse
 : ${OPENSTACK_RELEASE:=icehouse}
 
+# CirrOS image URL
+CIRROS_URL="http://download.cirros-cloud.net/0.3.3/cirros-0.3.3-x86_64-disk.img"
+
 # Networks used by OpenStack training-labs setup
 : ${MGMT_NET:=10.10.10.1}
 : ${DATA_NET:=10.20.20.1}
diff --git a/labs/scripts/apt_pre-download.sh b/labs/scripts/apt_pre-download.sh
index 95e9b272..1b5b1a33 100755
--- a/labs/scripts/apt_pre-download.sh
+++ b/labs/scripts/apt_pre-download.sh
@@ -9,10 +9,34 @@ exec_logfile
 indicate_current_auto
 
 # Download CirrOS image
-CIRROS_URL="http://download.cirros-cloud.net/0.3.3/cirros-0.3.3-x86_64-disk.img"
-if [ ! -f "$IMG_DIR/$(basename "$CIRROS_URL")" ]; then
-    wget --directory-prefix="$IMG_DIR" "$CIRROS_URL"
-fi
+function get_cirros {
+    local file_name=$(basename $CIRROS_URL)
+    local remote_dir=$(dirname $CIRROS_URL)
+    local md5_f=$file_name.md5sum
+
+    mkdir -p "$IMG_DIR"
+
+    # Download to IMG_DIR to cache the data if the directory is shared
+    # with the host computer.
+    if [ ! -f "$IMG_DIR/$md5_f" ]; then
+        wget -O - "$remote_dir/MD5SUMS"|grep "$file_name" > "$IMG_DIR/$md5_f"
+    fi
+
+    if [ ! -f "$IMG_DIR/$file_name" ]; then
+        wget --directory-prefix="$IMG_DIR" "$CIRROS_URL"
+    fi
+
+    # Make sure we have image and MD5SUM on the basedisk.
+    if [ "$IMG_DIR" != "$HOME/img" ]; then
+        mkdir -p "$HOME/img"
+        cp -a "$IMG_DIR/$file_name" "$IMG_DIR/$md5_f" "$HOME/img"
+    fi
+
+    cd "$HOME/img"
+    md5sum -c "$HOME/img/$md5_f"
+    cd -
+}
+get_cirros
 
 function apt_download {
 
diff --git a/labs/scripts/setup_glance.sh b/labs/scripts/setup_glance.sh
index d3a07297..af67bdc8 100755
--- a/labs/scripts/setup_glance.sh
+++ b/labs/scripts/setup_glance.sh
@@ -108,7 +108,7 @@ glance image-create \
     --name Cirros_x86_64 \
     --is-public true \
     --container-format bare \
-    --disk-format qcow2 < "$IMG_DIR/cirros-0.3.3-x86_64-disk.img"
+    --disk-format qcow2 < "$HOME/img/$(basename $CIRROS_URL)"
 
 #------------------------------------------------------------------------------
 # Verify the Image Service installation