Run all openstack services in virtualenvs:

Python package dependency conflicts have been observed
to occur for certain combinations of services at certain
revision.

Running all services in virtualenvs removes the issue.

Change-Id: I100817569b43a5af3427b0ae20cebdc7d55d03a5

elements/os-svc-install/bin/os-svc-daemon

@@ -18,7 +18,10 @@ pre-start script
 end script
 
 respawn
-exec sudo -u $user $cmd $args
+
+script
+  exec sudo -u $user /opt/stack/venvs/$user/bin/$cmd $args
+end script
 EOF
 }
 

elements/os-svc-install/bin/os-svc-install

@@ -4,9 +4,32 @@ set -eux
 pypi_mirror=http://pypi.openstack.org/
 pip_install="pip install -i $pypi_mirror "
 
+
+function python-install() {
+  local name=$1
+  local svc_root=$2
+
+  pushd /opt/stack/venvs
+  virtualenv --system-site-packages $name
+  popd
+
+  set +u
+  source /opt/stack/venvs/$name/bin/activate
+  set -u
+
+  [ -e $svc_root/tools/pip-requires ] && pip install -r $svc_root/tools/pip-requires
+
+  $pip_install $svc_root
+
+  set +u
+  deactivate
+  set -u
+}
+
+
 function install-os-service() {
   local user=$1
-  local repo=$2
+  local repo=$(echo $2 | sed 's/github.com/review.openstack.org/')
   local branch=$3
 
   id $user || useradd $user --system -d /var/run/$user -s /bin/false
@@ -19,16 +42,12 @@ function install-os-service() {
 
   if [ ! -e $svc_root ]; then
     git clone --depth=1 -b $branch $repo $svc_root
-
-    [ -e $svc_root/tools/pip-requires ] && pip install -r $svc_root/tools/pip-requires
-    $pip_install $svc_root
+    python-install $user $svc_root
   else
     if ! git $git_dir remote -v | grep $repo; then
       echo "ERROR: $svc_root exists and did not come from $repo"
       exit 1
     fi
-
-    # raise an error unless existing repo is at expected git-rev
     actual_rev=$(git $git_dir show | head -1 | awk '{print $2}')
     git $git_dir checkout $branch
     expected_rev=$(git $git_dir show | head -1 | awk '{print $2}')

elements/os-svc-install/pre-install.d/04-os-svc-install

@@ -3,7 +3,11 @@ set -eux
 
 install-packages python-pip
 
+pip install -U distribute # required by virtualenv
+pip install virtualenv
+
 install -m 0755 -o root -g root $(dirname $0)/../bin/os-svc-install /usr/local/bin/os-svc-install
 install -m 0755 -o root -g root $(dirname $0)/../bin/os-svc-daemon  /usr/local/bin/os-svc-daemon
 install -m 0755 -o root -g root $(dirname $0)/../bin/os-db-create   /usr/local/bin/os-db-create
 
+install -m 0755 -o root -g root -d /opt/stack/venvs