(bug 578) Fix installer on Ubuntu 18.04

We originally ran into this at the hackfest, where the installer would
fail on Ubuntu 18.04, the latest long-term supported release.

The behaviour of the `sg` command has failed (an apparent upstream
change) so that it can't be reliably used to check the error code of the
command it runs.

Considering the original use of `sg`, to ensure that the user had access
to lxd in order to bootstrap, reduces how we use `sg`, only calling it
if we need to bootstrap a new juju controller.

The other commands -- `juju show-controller` and `juju controllers` --
do not need access to the lxd group in order to function.

I've tested this patch on Ubuntu 16.04 and 18.04 and verified that it
works as expected on both (where lxd now pre-installed) and will also
work with older versions of 16.04 that may not have it installed.

Signed-off-by: Adam Israel <adam.israel@canonical.com>
Change-Id: I0e50ef3ac3cf127b63f5f56d8f90fea44f5be0f2

diff --git a/installers/full_install_osm.sh b/installers/full_install_osm.sh
index f67ba08..042c98b 100755 (executable)
--- a/installers/full_install_osm.sh
+++ b/installers/full_install_osm.sh
@@ -83,7 +83,7 @@ function uninstall(){
 }
 
 # takes a juju/accounts.yaml file and returns the password specific
-# for a controller. I wrote this using only bash tools to minimize 
+# for a controller. I wrote this using only bash tools to minimize
 # additions of other packages
 function parse_juju_password {
    password_file="${HOME}/.local/share/juju/accounts.yaml"
@@ -632,11 +632,11 @@ function install_juju() {
 }
 
 function juju_createcontroller() {
-    if ! sg lxd -c "juju show-controller $OSM_STACK_NAME &> /dev/null"; then
+    if ! juju show-controller $OSM_STACK_NAME &> /dev/null; then
         # Not found created, create the controller
         sg lxd -c "juju bootstrap --bootstrap-series=xenial localhost $OSM_STACK_NAME"
     fi
-    [ $(sg lxd -c "juju controllers" | awk "/^${OSM_STACK_NAME}[\*| ]/{print $1}"|wc -l) -eq 1 ] || FATAL "Juju installation failed"
+    [ $(juju controllers | awk "/^${OSM_STACK_NAME}[\*| ]/{print $1}"|wc -l) -eq 1 ] || FATAL "Juju installation failed"
 }
 
 function generate_docker_images() {
@@ -1382,4 +1382,3 @@ fi
 wget -q -O- https://osm-download.etsi.org/ftp/osm-4.0-four/README2.txt &> /dev/null
 track end
 echo -e "\nDONE"
-