[Aboot] refactor boot0.j2 for Aboot bootloader (#1445)
Now properly differenciate the image installation and the kexec operations. This is useful for fast-reboot operations. Minor updates include - better command line management - using partition UUID in the command line
This commit is contained in:
Samuel Angebault
Prince Sunny
parent
667ca3254e
commit
e18e15f31b
@ -14,23 +14,55 @@
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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# Aboot stage 0 boot
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# Aboot stage 0 boot script
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#
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# This boot0 script can be used in different scenario
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# - Installation and boot from Aboot (manual or reboot on a new image)
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# - EOS to SONiC fast-reboot (installation and kexec in EOS)
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# - SONiC to SONiC fast-reboot (installation and kexec in SONiC)
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#
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# Use it this way:
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# - swipath=path/to/swi install=true boot0
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# - swipath=path/to/swi install=true force=true boot0
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# - swipath=path/to/swi kexec=true boot0
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#
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# The logic defaults to the first scenario but providing extra environment variable
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# will affect the behavior of the script.
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# The list of variables is maintained here
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# - KERNEL : relative path to the kernel to execute
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# - INITRD : relative path to the initrd to load
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# - CMDLINE : place to find the default kernel cmdline to use for the platform
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#
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# By default the boot0 script will behave for an Aboot based behavior.
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# Options can be provided to only run some features of this script.
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#
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# Extra kernel parameters can be provided at runtime by the user by adding them
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# into a kernel-params file.
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set -x
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kernel=boot/vmlinuz-3.16.0-5-amd64
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initrd=boot/initrd.img-3.16.0-5-amd64
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kernel_params=kernel-params
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image_name="image-%%IMAGE_VERSION%%"
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do_not_clean="do-not-clean"
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kernel_params="kernel-params"
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aboot_machine="arista_unknown"
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[ -z "$target_path" ] && target_path=/mnt/flash
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image_path="$target_path/image-%%IMAGE_VERSION%%"
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# expect the swi to be a non empty file
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[ -s "$swipath" ] || exit 1
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# extract mount point from the swi path, e.g., /mnt/flash/sonic.swi --> /mnt/flash
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if [ -z "$target_path" ]; then
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if [ -z "$swipath" ]; then
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echo "target_path= is required when swipath= is not provided"
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exit 1
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fi
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target_path=$(df "$swipath" | tail -1 | tr -s " " | cut -d ' ' -f6)
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fi
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image_path="$target_path/$image_name"
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bootconfigvars="SWI SWI_COPY POST_LEVEL CONSOLESPEED PASSWORD NETDEV NETAUTO NETIP NETMASK NETGW NETDOMAIN NETDNS NETHW memtest"
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cmdline_base="$target_path/kernel-params-base"
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cmdline_image="$image_path/kernel-cmdline"
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bootconfigvars="KERNEL INITRD CONSOLESPEED PASSWORD NETDEV NETAUTO NETIP NETMASK NETGW NETDOMAIN NETDNS NETHW memtest"
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parse_environment_config() {
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for n in ${bootconfigvars}; do
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@ -46,6 +78,8 @@ clean_flash() {
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for f in $(ls -A $target_path); do
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if [ $f != "${swipath##*/}" ] &&
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[ $f != "boot-config" ] &&
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[ $f != "$kernel_params" ] &&
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[ $f != "$cmdline_base" ] &&
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[ $f != "minigraph.xml" ]
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then
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rm -rf "$target_path/$f"
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@ -54,7 +88,6 @@ clean_flash() {
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}
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extract_image() {
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mkdir -p "$image_path"
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## Unzip the image except boot0 and dockerfs archive
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@ -80,7 +113,7 @@ extract_image() {
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fi
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## use new reduced-size boot swi
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echo "SWI=flash:image-%%IMAGE_VERSION%%/{{ ABOOT_BOOT_IMAGE }}" > "$target_path/boot-config"
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echo "SWI=flash:$image_name/{{ ABOOT_BOOT_IMAGE }}" > "$target_path/boot-config"
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## Remove installer swi as it has lots of redundunt contents
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rm -f "$swipath"
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@ -91,8 +124,12 @@ extract_image() {
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write_machine_config() {
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## Detect SKU and create a hardware description file
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aboot_version=$(grep ^Aboot /etc/cmdline | sed 's/^.*norcal.-//')
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aboot_build_date=$(stat -c %y /bin/sysinit | sed 's/ /T/')
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aboot_version=$(grep ^Aboot "$cmdline_base" | sed 's/^.*norcal.-//' | tail -n 1)
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if [ -x /bin/sysinit ]; then
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aboot_build_date=$(stat -c %y /bin/sysinit | sed 's/ /T/')
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else
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aboot_build_date="unknown"
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fi
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cat <<EOF > ${target_path}/machine.conf
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aboot_version=$aboot_version
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aboot_vendor=arista
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@ -101,16 +138,17 @@ aboot_machine=$aboot_machine
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aboot_arch=x86_64
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aboot_build_date=$aboot_build_date
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EOF
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chmod a+r "${target_path}/machine.conf"
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}
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platform_specific() {
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local platform="$(grep -Eo 'platform=[^ ]+' /etc/cmdline | cut -f2 -d=)"
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local sid="$(grep -Eo 'sid=[^ ]+' /etc/cmdline | cut -f2 -d=)"
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local platform="$(grep -Eo 'platform=[^ ]+' "$cmdline_base" | cut -f2 -d=)"
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local sid="$(grep -Eo 'sid=[^ ]+' "$cmdline_base" | cut -f2 -d=)"
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# set varlog size to 100MB
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local varlog_size=100
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local flash_size=$(($(df | grep flash | tr -s ' ' | cut -f2 -d' ') / 1000))
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local flash_size=$(($(df | grep -E '/mnt/flash|/host' | tr -s ' ' | cut -f2 -d' ') / 1000))
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if [ "$platform" = "raven" ]; then
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aboot_machine=arista_7050_qx32
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@ -132,7 +170,12 @@ platform_specific() {
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flash_size=28000
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fi
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if [ "$platform" = "rook" ]; then
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readprefdl -f /tmp/.system-prefdl -d > /mnt/flash/.system-prefdl
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if [ -x /bin/readprefdl ]; then
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readprefdl -f /tmp/.system-prefdl -d > /mnt/flash/.system-prefdl
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elif [ -f /etc/prefdl ]; then
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cp /etc/prefdl /mnt/flash/.system-prefdl
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chmod a+r /mnt/flash/.system-prefdl
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fi
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fi
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if [ $flash_size -ge 28000 ]; then
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@ -144,45 +187,119 @@ platform_specific() {
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echo "varlog_size=$varlog_size" >>/tmp/append
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}
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# check the hash file in the image, and determine to install or just skip
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GIT_REVISION=$(unzip -p "$swipath" .imagehash)
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LOCAL_IMAGEHASH=$(cat $image_path/.imagehash 2>/dev/null || true)
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if [ "$GIT_REVISION" != "$LOCAL_IMAGEHASH" ]; then
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[ -z "$sonic_upgrade" ] && clean_flash
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extract_image
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get_uuid_for() {
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local dev="$1"
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if type lsblk 2>&1 > /dev/null; then
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lsblk "$dev" -n --output UUID
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elif type blkid 2>&1 > /dev/null; then
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blkid | grep "^$dev" | sed -n "s/^.* UUID=\"//p" | grep -Eo '[^"]+'
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fi
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}
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write_boot_configs() {
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if $in_aboot; then
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# generate the default kernel parameters for the platform
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echo "$append" > $cmdline_base
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cat /etc/cmdline | sed "/^\(${bootconfigvars// /\|}\|crashkernel\|loglevel\|ignore_loglevel\)\(\$\|=\)/d;/^\$/d" >> $cmdline_base
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parse_environment_config >> $cmdline_base
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elif [ ! -f "$cmdline_base" ]; then
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# some systems were started with other versions of this script and therefore
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# do not have the $cmdline_base file. we assume that we are on Sonic or EOS.
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cat /proc/cmdline > $cmdline_base
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sed -Ei 's/^(.*) rw .*$/\1/' $cmdline_base
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fi
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cp $cmdline_base /tmp/append
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platform_specific
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echo "rw loop=$image_name/fs.squashfs loopfstype=squashfs apparmor=1 security=apparmor quiet" >> /tmp/append
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# use extra parameters from kernel-params hook if the file exists
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if [ -f "$target_path/$kernel_params" ]; then
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cat "$target_path/$kernel_params" >> /tmp/append
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fi
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# setting root partition if not overridden by kernel-params
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if ! grep -q "root=" /tmp/append; then
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rootdev="$(mount | grep -E '/mnt/flash|/host' | cut -f1 -d' ')"
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rootfstype="$(mount | grep -E '/mnt/flash|/host' | cut -f5 -d' ')"
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rootuuid="$(get_uuid_for $rootdev)"
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if [ -z "$rootuuid" ] || [ "$rootfstype" = "vfat" ] ; then
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echo "root=$rootdev" >> /tmp/append
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else
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echo "root=UUID=$rootuuid" >> /tmp/append
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fi
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fi
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mv /tmp/append $cmdline_image
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[ -e ${target_path}/machine.conf ] || write_machine_config
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}
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run_kexec() {
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local cmdline="$(cat $cmdline_image | tr '\n' ' ')"
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local kernel="${KERNEL:-$(find $image_path/boot -name 'vmlinuz-*' -type f | head -n 1)}"
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local initrd="${INITRD:-$(find $image_path/boot -name 'initrd.img-*' -type f | head -n 1)}"
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kexec --load --initrd="$initrd" --append="$cmdline" "$kernel"
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[ -z "$testonly" ] || exit 0
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echo "kexecing..."
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kexec --exec
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}
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# In Aboot no option will be provided therefore these are the default values to use
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in_aboot=true
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do_clean=true
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do_install=true
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do_kexec=true
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# prevent the flash from being cleaned if the do-not-clean file exists
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if [ -f "$target_path/$do_not_clean" ]; then
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do_clean=false
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fi
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[ -z "$sonic_upgrade" ] || exit 0
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# build the new cmdline
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echo "$append" >/tmp/append
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parse_environment_config >>/tmp/append
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cat /etc/cmdline | sed "/^\(${bootconfigvars// /\|}\|crashkernel\|loglevel\|ignore_loglevel\)\(\$\|=\)/d;/^\$/d" >>/tmp/append
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echo "rw loop=image-%%IMAGE_VERSION%%/fs.squashfs loopfstype=squashfs apparmor=1 security=apparmor quiet" >>/tmp/append
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# process platform specific operations
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platform_specific
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[ -e ${taget_path}/machine.conf ] || write_machine_config
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# use extra parameters from kernel-params hook if the file exists
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if [ -f "$image_path/$kernel_params" ]; then
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cat "$image_path/$kernel_params" >>/tmp/append
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# Parse the cmdline options (used from EOS or from SONiC)
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if [ ! -z "$install" ] || [ ! -z "$sonic_upgrade" ]; then
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# install from SONiC or EOS
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in_aboot=false
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do_clean=false
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do_kexec=false
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elif [ ! -z "$kexec" ]; then
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# kexec from SONiC or EOS
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in_aboot=false
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do_install=false
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do_clean=false
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elif [ $# -ne 0 ]; then
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echo "usage: $0 (see code)"
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exit 1
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fi
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# setting root partition if not overridden by kernel-params
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if ! grep -q "root=" /tmp/append; then
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rootdev=$(mount | grep '/mnt/flash' | cut -f1 -d' ')
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rootfstype=$(mount | grep '/mnt/flash' | cut -f5 -d' ')
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echo "root=$rootdev" >>/tmp/append
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# install the image if newer
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if $do_install; then
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# we expect the swi to install to be a non empty file
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if [ ! -s "$swipath" ]; then
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echo "The swipath= environment variable does not point to a valid SWI"
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exit 1
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fi
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# check the hash file in the image, and determine to install or just skip
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GIT_REVISION=$(unzip -p "$swipath" .imagehash)
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LOCAL_IMAGEHASH=$(cat $image_path/.imagehash 2>/dev/null || true)
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if [ "$GIT_REVISION" != "$LOCAL_IMAGEHASH" ] || [ ! -z "$force" ]; then
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if $do_clean; then
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clean_flash
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fi
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extract_image
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write_boot_configs
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fi
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fi
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# chainloading using kexec
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initrd_path="$image_path/$initrd"
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kernel_path="$image_path/$kernel"
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cmdline="$(tr '\n' ' ' </tmp/append)"
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if $do_kexec; then
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run_kexec
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fi
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kexec --load --initrd="$initrd_path" --append="$cmdline" "$kernel_path"
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[ -z "$testonly" ] || exit 0
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kexec --exec
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