Enable Multinode Subcloud in Distributed Cloud

To create a duplex subcloud with multiple nodes with different
personalites, pxeboot must be supported by controller-0 of the
subcloud.

Here, pxeboot is enabled on controller-0 by downloading files
required for pxeboot from the System Controller, and copying
them to the relevant locations under /var/www/pages/feed/rel-id
and /var/pxeboot.

Test Plan:
PASS: Verify that all nodes in the subcloud install, come online
      and are unlocked, enabled and available by the end of the
      installation process.

PASS: Verify that multinode install completes successfully with
      prestaged ostree_repo.

Depends-On: https://review.opendev.org/c/starlingx/metal/+/862619/
Story: 2010118
Task: 46754

Change-Id: I8cfda9688d41d1f6f5997ac81f9b6e21d7f3ebe6
Signed-off-by: Shrikumar Sharma <shrikumar.sharma@windriver.com>

kickstart/files/miniboot.cfg

@@ -867,6 +867,7 @@ HOOK_LABEL="ks-early"
 
 export debug=0
 export prefix=""
+export insturl_orig=""
 
 # Assume there is no Platform Backup (persistent) Partition
 export BACKUP_PART_FOUND=0
@@ -1940,6 +1941,8 @@ else
 
         # If ostree_repo is found at the mounted backup directory,
         # then set the ostree url to its location.
+
+        insturl_orig="${insturl}"
         if [ -e ${backup_mount}/ostree_repo ]; then
             insturl="file:///${backup_mount}/ostree_repo"
             ilog "Setting insturl to ${insturl} to use prestaged ostree_repo"
@@ -2610,7 +2613,16 @@ if [ "${controller}" = true ] ; then
     sw_release="xxxPLATFORM_RELEASExxx"  # updated by the build
 
     feed="${IMAGE_ROOTFS}/var/www/pages/feed/rel-${sw_release}"
+    pxeboot="${IMAGE_ROOTFS}/var/pxeboot"
     repo="${feed}/ostree_repo"
+    pxedir="${IMAGE_ROOTFS}/var/www/pages/iso/${sw_release}"
+
+    mkdir -p "${repo}"
+    mkdir -p "${feed}"
+    mkdir -p "${feed}/pxeboot"
+    mkdir -p "${feed}/kickstart"
+    mkdir -p "${pxeboot}/rel-${sw_release}"
+    mkdir -p "${pxedir}"
 
     if [ ${OSTREE_REPO_FETCHED} -eq 0 ] ; then
         if is_usb_install -eq 0 ; then
@@ -2637,6 +2649,60 @@ if [ "${controller}" = true ] ; then
 
         # This fetch is only needed once because the repo is stored in /var
         set_variable "ostree_repo_fetched"
+
+        # fetch pxeboot directories
+        pxeurl=$(echo ${insturl_orig} | sed -e s/ostree_repo//)
+        # Check for noverifyssl
+        if grep -q noverifyssl /proc/cmdline; then
+            NOVERIFYSSL_WGET_OPT="--no-check-certificate"
+        else
+            NOVERIFYSSL_WGET_OPT=""
+        fi
+
+        # change to the pxedir. Store pxe artifacts here.
+        pushd ${pxedir} > /dev/null
+
+        #download the iso directory from the System Controller to here.
+        wget ${NOVERIFYSSL_WGET_OPT} -nH -np -r ${pxeurl}/pxeboot/ --cut-dirs=2 -o /${LAT_DIR}/wget_pxe_files.tmp
+        [ $? -ne 0 ] && report_failure_with_msg "Failed to download iso/${sw_release}/pxeboot from system controller"
+
+        wget ${NOVERIFYSSL_WGET_OPT} -nH -np -r ${pxeurl}/kickstart/ --cut-dirs=2 -o /${LAT_DIR}/wget_pxe_files.tmp
+        [ $? -ne 0 ] && report_failure_with_msg "Failed to download iso/${sw_release}/kickstart from system controller"
+
+        wget ${NOVERIFYSSL_WGET_OPT} ${pxeurl}/efi.img -o /${LAT_DIR}/wget.tmp
+        [ $? -ne 0 ] && report_failure_with_msg "Failed to find ${pxeurl}/pxeboot/${f}"
+
+        # copy files to relevant locations in feed/rel-id/ and /var/pxeboot
+        cp -a pxeboot ${feed}
+        cp -a pxeboot/bzImage* ${feed}/pxeboot/
+        cp -a pxeboot/initrd* ${feed}/pxeboot/
+        cp -a efi.img ${feed}
+        cp -a kickstart ${feed}
+
+        cp -a efi.img ${pxeboot}
+        cp -a pxeboot/bzImage* ${pxeboot}/rel-${sw_release}/
+        cp -a pxeboot/initrd* ${pxeboot}/rel-${sw_release}/
+        cp -a pxeboot/EFI ${pxeboot}/
+
+        # go out of this directory
+        popd > /dev/null
+
+        # Temporary WorkAround: The current UEFI pxeboot loader does not call the
+        # default provisioning grub menu in /var/pxeboot/pxelinux.cfg/grub.cfg.
+        #
+        # While the above issue is investigated, to support DX and system node
+        # install for UEFI servers this code moves the lat grub.cfg aside and
+        # creates a link to the default provisioning mac based grub menu.
+
+        pushd ${pxeboot}/EFI/BOOT > /dev/null
+        if [ ! -L grub.cfg ] ; then
+            if [ -e grub.cfg ] ; then
+                mv grub.cfg grub.cfg.lat
+            fi
+            ln -s ../../pxelinux.cfg/grub.cfg
+        fi
+        popd > /dev/null
+
     fi
 fi