Enable cloud-init services based on boot paremeter

This commit enables the cloud-init systemd services based on presence
of cloud-init=enabled boot parameter

Test plan:

PASS:
- Boot ISO including cloud-init=enabled boot parameter. Validate that
  the cloud-init systemd services are enabled.
  Boot using a nocloud seed ISO. Verify that cloud-init functions as
  intended

Story: TBD

Signed-off-by: Kyle MacLeod <kyle.macleod@windriver.com>
Change-Id: I1b934dd8f61a5bb342e1741db5ee0678221f2834

kickstart/files/kickstart.cfg

@@ -142,6 +142,21 @@ function report_failure_with_msg()
     reboot -f
 }
 
+########################################################################
+# Name      : check_rc_with_msg
+# Purpose   : Check given return code, reporting failure if non-zero
+# Parameters: \$1 is the exit code to check
+#             \$2 is the failure message string
+# Return    : Does not return if exit code is non-zero
+########################################################################
+function check_rc_with_msg {
+    local rc=\${1}
+    msg=\${2}
+    if [ \${rc} -ne 0 ]; then
+        report_failure_with_msg "\${msg} [rc=\${rc}]"
+    fi
+}
+
 ########################################################################
 # Name      : get_disk
 # Parameters: \$1 - any disk path
@@ -371,6 +386,20 @@ function is_usb_install()
     fi
 }
 
+#########################################################################
+# Name     : is_cloudinit_enabled
+# Returns  : true :0
+#            false:1
+#########################################################################
+function is_cloudinit_enabled()
+{
+    if grep -q 'cloud-init=enabled' /proc/cmdline; then
+        return 0
+    else
+        return 1
+    fi
+}
+
 #########################################################################
 # Name     : check_prestage
 # Returns  : true :0
@@ -3046,6 +3075,25 @@ if [ "${controller}" = true ] ; then
                     fi
                 fi
 
+                # TODO remove
+                if [ -d /instboot/seed ]; then
+                    ilog "Copying cloud-init seed to to ${backup_mount_release}"
+                    cp -r /instboot/seed ${backup_mount_release}
+                    rc=$?
+                    if [ ${rc} -ne 0 ]; then
+                        report_failure_with_msg "Unable to copy from /instboot/seed to /opt/platform-backup/${sw_release} [rc=${rc}]"
+                    fi
+                fi
+                # TODO remove
+                if [ -d /instboot/factory-install ]; then
+                    ilog "Copying factory-install to to ${backup_mount_release}"
+                    cp -r /instboot/factory-install ${backup_mount_release}
+                    rc=$?
+                    if [ ${rc} -ne 0 ]; then
+                        report_failure_with_msg "Unable to copy from /instboot/factory-install to /opt/platform-backup/${sw_release} [rc=${rc}]"
+                    fi
+                fi
+
                 umount "${backup_mount}"
             fi
         else
@@ -3352,6 +3400,17 @@ if [ "${storage}" = true ] ; then
     ln -s /usr/share/starlingx/pmon.d/syslog-ng.conf ${IMAGE_ROOTFS}/etc/pmon.d/syslog-ng.conf
 fi
 
+if is_cloudinit_enabled; then
+    ilog "Enabling cloud-init services"
+    mkdir -p "${IMAGE_ROOTFS}"/etc/systemd/system/cloud-init.target.wants
+    check_rc_with_msg $? "mkdir failed (cloud-init.target.wants)"
+    ln -s /usr/lib/systemd/system/cloud-config.service "${IMAGE_ROOTFS}"/etc/systemd/system/cloud-init.target.wants/cloud-config.service && \
+    ln -s /usr/lib/systemd/system/cloud-init-local.service "${IMAGE_ROOTFS}"/etc/systemd/system/cloud-init.target.wants/cloud-init-local.service && \
+    ln -s /usr/lib/systemd/system/cloud-init.service "${IMAGE_ROOTFS}"/etc/systemd/system/cloud-init.target.wants/cloud-init.service && \
+    ln -s /usr/lib/systemd/system/cloud-final.service "${IMAGE_ROOTFS}"/etc/systemd/system/cloud-init.target.wants/cloud-final.service
+    check_rc_with_msg $? "Failed to setup cloud-init services"
+fi
+
 if [ -e "/instboot/ks-addon.cfg" ]; then
     ilog "Running kickstart addon script"
     source /instboot/ks-addon.cfg