Updating Keystone installation

Updating the Keystone installer script and dockerfile.

Change-Id: I78b9b7f363a3dba0701754846dc4bbee2fa5e6e3
Signed-off-by: Eduardo Sousa <esousa@whitestack.com>

docker/Keystone/Dockerfile

@@ -21,25 +21,12 @@ RUN apt-get update && \
     rm -rf /var/lib/apt/lists/* && \
     chmod +x start.sh
 
-# DB Hostname
-ENV DB_HOST                 keystone-db
-
-# DB Port
-ENV DB_PORT                 3306
-
-# DB Root User
-ENV ROOT_DB_USER            root
-
-# DB Root Password
-ENV ROOT_DB_PASSWORD        admin
-
-# Keystone user password
-ENV KEYSTONE_DB_PASSWORD    admin
-
-# Admin password
-ENV ADMIN_PASSWORD          admin
-
-# NBI password
-ENV NBI_PASSWORD            nbi
-
-ENTRYPOINT ./start.sh
\ No newline at end of file
+ENV DB_HOST                 keystone-db     # DB Hostname
+ENV DB_PORT                 3306            # DB Port
+ENV ROOT_DB_USER            root            # DB Root User
+ENV ROOT_DB_PASSWORD        admin           # DB Root Password
+ENV KEYSTONE_DB_PASSWORD    admin           # Keystone user password
+ENV ADMIN_PASSWORD          admin           # Admin password
+ENV NBI_PASSWORD            nbi             # NBI password
+
+ENTRYPOINT ./start.sh

docker/Keystone/scripts/start.sh

 #!/bin/bash
 
+DB_EXISTS=""
+
 max_attempts=120
 function wait_db(){
     db_host=$1
@@ -27,8 +29,7 @@ function is_db_created() {
     db_pswd=$4
     db_name=$5
 
-    RESULT=`mysqlshow -h"$db_host" -P"$db_port" -u"$db_user" -p"$db_pswd" | grep -v Wildcard | grep -o $db_name`
-    if [ "$RESULT" == "$db_name" ]; then
+    if mysqlshow -h"$db_host" -P"$db_port" -u"$db_user" -p"$db_pswd" | grep -v Wildcard | grep -q $db_name; then
         echo "DB $db_name exists"
         return 0
     else
@@ -94,9 +95,11 @@ if [ -z $DB_EXISTS ]; then
     openstack role add --project service --user nbi admin
 fi
 
-while [ $(ps -ef | grep -v grep | grep apache2 | wc -l) -ne 0 ]
+while ps -ef | grep -v grep | grep -q apache2
 do
     sleep 60
 done
 
+# Only reaches this point if apache2 stops running
+# When this happens exits with error code
 exit 1