TT#23803 TT#23872 If systemd is active install sysvinit-core and reboot

Otherwise we're failing at:

| ABORTED: Error while installing sudo coreutils ssh mawk debsums libtemplate-perl sed pwgen ngcp-system-tools-ce sysvinit-core systemd-shim- systemd- libpam-systemd- cgmanager-ci-info

due to:

| systemd is the active init system, please switch to another before removing systemd.

While at it fix shellcheck related warnings to be able to
bypass gerrit review.

Change-Id: Ice0b8760c502c5b6d2acff2fe0990e03717f6f5c

ec2-create-ce

@@ -1,7 +1,7 @@
 #!/bin/bash
 
 export EC2_HOME="/usr/share/ec2/ec2-api-tools"
-export JAVA_HOME="$(dirname $(dirname $(readlink /etc/alternatives/java)))"
+export JAVA_HOME="$(dirname "$(dirname "$(readlink /etc/alternatives/java)")")"
 export PATH="$PATH:${EC2_HOME}/bin"
 export TZ="UTC"
 
@@ -110,7 +110,7 @@ copy_ami() {
 	  return 1
 	fi
 
-	local ami_id_copy="$(awk '/^IMAGE/ {print $2}' $logfile)"
+	local ami_id_copy="$(awk '/^IMAGE/ {print $2}' "$logfile")"
 
 	if [ -z "$ami_id_copy" ] ; then
 	  echo "Error retrieving AMI ID $ami_id for region ${target_region}:"
@@ -172,7 +172,7 @@ remove_ami() {
 
 CMDLINE_OPTS=ami-name:,base-ami:,copy-to-all-regions,elastic-ip:,help,instance-type:,keep-ami-snapshot,ngcp-release:,public,region:,remove-existing-ami,skip-reboot
 
-_opt_temp=$(getopt --name $0 -o +bch --long $CMDLINE_OPTS -- "$@")
+_opt_temp=$(getopt --name "$0" -o +bch --long $CMDLINE_OPTS -- "$@")
 if [ $? -ne 0 ]; then
   echo "Try '$0 --help' for more information." >& 2
   exit 1
@@ -256,8 +256,8 @@ fi
 
 check4progs(){
   local RC=''
-  for arg in $* ; do
-    which $arg >/dev/null 2>&1 || RC="$arg"
+  for arg in "$@" ; do
+    which "$arg" >/dev/null 2>&1 || RC="$arg"
   done
   if [ -n "$RC" ] ; then
     echo "$RC not found/executable" >&2
@@ -322,6 +322,13 @@ cat > "$USER_DATA_FILE" << EOF
 wget -O /tmp/ngcp-installer.deb http://deb.sipwise.com/spce/ngcp-installer-${NGCP_RELEASE}.deb
 dpkg -i /tmp/ngcp-installer.deb
 
+if [ -d /run/systemd/system ] ; then
+  echo "Switching from systemd to sysvinit (pre-reboot)"
+  apt-get install --yes sysvinit-core
+  echo "Rebooting now to switch from systemd to sysvinit"
+  reboot
+fi
+
 # workaround for mr4.2.1
 export HOME=/root/
 
@@ -357,12 +364,12 @@ if [ -n "$ELASTIC_IP" ] ; then
   ec2-associate-address --region "${AWS_REGION}" "${ELASTIC_IP}" -i "${INSTANCE_ID}"
 fi
 
-STATUS="$(ec2-describe-instances --region ${AWS_REGION} --filter instance-id=$INSTANCE_ID | awk '/INSTANCE/ {print $6}')"
+STATUS="$(ec2-describe-instances --region ${AWS_REGION} --filter instance-id="$INSTANCE_ID" | awk '/INSTANCE/ {print $6}')"
 echo "Starting instance ID $INSTANCE_ID for ngcp version $NGCP_VERSION"
 
 retry=120 # up to 10 minutes
 while [ "$STATUS" != "running" ] && [ $retry -ne 0 ] ; do
-  STATUS="$(ec2-describe-instances --region ${AWS_REGION} --filter instance-id=$INSTANCE_ID | awk '/INSTANCE/ {print $6}')"
+  STATUS="$(ec2-describe-instances --region ${AWS_REGION} --filter instance-id="$INSTANCE_ID" | awk '/INSTANCE/ {print $6}')"
   retry=$((retry - 1))
   echo "Instance ID $INSTANCE_ID not running yet, checking again in 5 seconds ($retry retries left)."
   sleep 5
@@ -373,7 +380,7 @@ if [ "$STATUS" != "running" ] ; then
   bailout 1
 fi
 
-HOSTNAME="$(ec2-describe-instances --region ${AWS_REGION} --filter instance-id=$INSTANCE_ID | awk '/INSTANCE/ {print $4}')"
+HOSTNAME="$(ec2-describe-instances --region ${AWS_REGION} --filter instance-id="$INSTANCE_ID" | awk '/INSTANCE/ {print $4}')"
 
 retry=360 # up to 30 minutes
 FINISHED_NGCP_CE_INSTALLATION=false
@@ -408,7 +415,7 @@ else
   retry=120 # up to 10 minutes
   STATUS=""
   while [ "$STATUS" != "running" ] && [ $retry -ne 0 ] ; do
-    STATUS="$(ec2-describe-instances --region ${AWS_REGION} --filter instance-id=$INSTANCE_ID | awk '/^INSTANCE/ {print $6}')"
+    STATUS="$(ec2-describe-instances --region ${AWS_REGION} --filter instance-id="$INSTANCE_ID" | awk '/^INSTANCE/ {print $6}')"
     retry=$((retry - 1))
     echo "Instance ID not yet running (status: ${STATUS}), checking again in 5 seconds ($retry retries left)."
     sleep 5
@@ -420,7 +427,7 @@ else
   fi
 
   # we probably have a new hostname after reboot
-  HOSTNAME="$(ec2-describe-instances --region ${AWS_REGION} --filter instance-id=$INSTANCE_ID | awk '/INSTANCE/ {print $4}')"
+  HOSTNAME="$(ec2-describe-instances --region ${AWS_REGION} --filter instance-id="$INSTANCE_ID" | awk '/INSTANCE/ {print $4}')"
 
   # now check for available ssh connection and nginx listening on port 1443
   retry=120 # up to 10 minutes
@@ -455,7 +462,7 @@ ec2-create-image --region "$AWS_REGION" \
      --description "$AMI_DESCRIPTION" \
      "$INSTANCE_ID" >"$LOGFILE_AMI"
 
-AMI_ID="$(awk '/^IMAGE/ {print $2}' $LOGFILE_AMI)"
+AMI_ID="$(awk '/^IMAGE/ {print $2}' "$LOGFILE_AMI")"
 
 retry=120 # up to 10 minutes
 STATUS=""