post-scripts: Enable systemd-binfmt for first boot.

ARMBAND NOTE(S):
- This is a bug fix + a new feature (arch list in a file on FM)
- This is overengineered because:
  * we want to move patching to post-ISO creation, OPNFV style;
  * easier integration with Fuel@OPNFV, using post-install scripts;
  * prepare for true multiarch support on Fuel Master;

IMPORTANT:
This commit introduces the following file on Fuel Master,
containing the list of arch supported for target nodes:
</etc/fuel_openstack_arch>.

This file is created AFTER pre.d OPNFV scripts are ran, also by
bootstrap_admin_node.sh, BEFORE the post.d scripts are executed.
NOTE: Arch format is the same used by dpkg (e.g.: "amd64 arm64")

Based on the number of foreign architectures we should support
(the list of archs in /etc/fuel_openstack_arch minus native arch),
we determine whether cross-builds are expected, in which case
binfmt support should be functional during first Fuel Master boot.

Since systemd-binfmt service has a series of preconditions for
starting, which are tested early during first boot, some of them
are NOT YET true (e.g. no binfmt handlers are present before
qemu-user-static package is installed), so the service is not
automatically started. Of course, this only affects the first boot.

Finally, this commit adds an OPNFV post-install script in
/opt/opnfv/bootstrap/post.d, which starts systemd-binfmt service.

Change-Id: I6dbe4b3ac5a2fd076881d6778ff66b82bb6c7379
Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>

1 files changed, 96 insertions, 0 deletions

diff --git a/patches/opnfv-fuel/0031-post-scripts-Enable-systemd-binfmt-for-first-boot.patch b/patches/opnfv-fuel/0031-post-scripts-Enable-systemd-binfmt-for-first-boot.patch
new file mode 100644
index 00000000..e3100962
--- /dev/null
+++ b/patches/opnfv-fuel/0031-post-scripts-Enable-systemd-binfmt-for-first-boot.patch
@@ -0,0 +1,96 @@
+From: Alexandru Avadanii <Alexandru.Avadanii@enea.com>
+Date: Thu, 9 Jun 2016 19:46:56 +0200
+Subject: [PATCH] post-scripts: Enable systemd-binfmt for first boot.
+
+IMPORTANT:
+This commit introduces the following file on Fuel Master,
+containing the list of arch supported for target nodes:
+</etc/fuel_openstack_arch>.
+
+This file is created AFTER pre.d OPNFV scripts are ran, also by
+bootstrap_admin_node.sh, BEFORE the post.d scripts are executed.
+NOTE: Arch format is the same used by dpkg (e.g.: "amd64 arm64")
+
+Based on the number of foreign architectures we should support
+(the list of archs in /etc/fuel_openstack_arch minus native arch),
+we determine whether cross-builds are expected, in which case
+binfmt support should be functional during first Fuel Master boot.
+
+Since systemd-binfmt service has a series of preconditions for
+starting, which are tested early during first boot, some of them
+are NOT YET true (e.g. no binfmt handlers are present before
+qemu-user-static package is installed), so the service is not
+automatically started. Of course, this only affects the first boot.
+
+Finally, this commit adds an OPNFV post-install script in
+/opt/opnfv/bootstrap/post.d, which starts systemd-binfmt service.
+---
+ build/bootstrap_admin_node.sh.patch                | 15 ++++++++++
+ .../post-scripts/80_prepare_cross_builds.sh        | 32 ++++++++++++++++++++++
+ 2 files changed, 47 insertions(+)
+ create mode 100755 build/f_isoroot/f_bootstrap/post-scripts/80_prepare_cross_builds.sh
+
+diff --git a/build/bootstrap_admin_node.sh.patch b/build/bootstrap_admin_node.sh.patch
+index b1ea90b..7f16d0b 100644
+--- a/build/bootstrap_admin_node.sh.patch
++++ b/build/bootstrap_admin_node.sh.patch
+@@ -24,6 +24,21 @@
+   nodes over PXE, they will be discovered and become available for installing \
+   OpenStack on them"
+ ***************
++*** 239,244 ****
++--- 239,250 ----
++  # /etc/fuel_openstack_version is provided by 'fuel-openstack-metadata' package
++  OPENSTACK_VERSION=$(cat /etc/fuel_openstack_version)
++
+++ # FIXME(armband): This part might be moved to an earlier stage later
+++ # /etc/fuel_openstack_arch is constructed based on local mirror metadata
+++ grep -oP "^Architectures: \K.*$" \
+++     ${wwwdir}/${OPENSTACK_VERSION}/ubuntu/x86_64/dists/mos${FUEL_RELEASE}/Release > \
+++     /etc/fuel_openstack_arch
+++
++  # We do not ship debian-installer kernel and initrd on ISO.
++  # But we still need to be able to create ubuntu cobbler distro
++  # which requires kernel and initrd to be available. So, we
++***************
+ *** 339,346 ****
+   set +x
+   echo "Done!"
+diff --git a/build/f_isoroot/f_bootstrap/post-scripts/80_prepare_cross_builds.sh b/build/f_isoroot/f_bootstrap/post-scripts/80_prepare_cross_builds.sh
+new file mode 100755
+index 0000000..d33d1d1
+--- /dev/null
++++ b/build/f_isoroot/f_bootstrap/post-scripts/80_prepare_cross_builds.sh
+@@ -0,0 +1,32 @@
++#/bin/sh
++##############################################################################
++# Copyright (c) 2016 Enea AB and others.
++# Alexandru.Avadanii@enea.com
++# All rights reserved. This program and the accompanying materials
++# are made available under the terms of the Apache License, Version 2.0
++# which accompanies this distribution, and is available at
++# http://www.apache.org/licenses/LICENSE-2.0
++##############################################################################
++
++echo "Preparing for cross-building bootstrap/target images"
++
++# Fmt handlers are set up by qemu-user-static (after systemd-binfmt
++# prerequisites are checked during first boot of Fuel Master node).
++
++# Cross-building support provides dpkg, as a fuel-agent dependency
++if which dpkg > /dev/null 2>&1; then
++  # /etc/fuel_openstack_arch is created by bootstrap_admin_node.sh
++  FOREIGN_ARCH_CNT=$(sed -e "s/$(dpkg --print-architecture)//" \
++    /etc/fuel_openstack_arch | wc -w)
++  if [ ${FOREIGN_ARCH_CNT} -gt 0 ]; then
++    # If no fmt handlers are configured, the service is not started,
++    # so request it explicitly (only necessary for the first boot).
++    systemctl start systemd-binfmt
++    if [ $? -ne 0 ]; then
++      echo "Error starting systemd-binfmt!"
++      exit 1
++    fi
++  fi
++fi
++
++echo "Done preparing cross-building"