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[reboot cause] Move reboot-cause files to /host directory so they persist across SONiC upgrades #2490

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Jan 29, 2019
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[reboot cause] Move reboot-cause files to /host directory so they persist across SONiC upgrades #2490

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[reboot cause] Move reboot-cause files to /host directory so they per…
jleveque Jan 25, 2019
c55cbec
[sonic-utilities] Update submodule to include related changes
jleveque Jan 28, 2019
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27 changes: 17 additions & 10 deletions files/image_config/platform/rc.local
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Original file line number Diff line number Diff line change
Expand Up @@ -106,24 +106,31 @@ value_extract() {
done
}

# Set up previous and next reboot cause files
# Set up previous and next reboot cause files accordingly
process_reboot_cause() {
REBOOT_CAUSE_FILE="/var/cache/sonic/reboot-cause.txt"
PREVIOUS_REBOOT_CAUSE_FILE="/var/cache/sonic/previous-reboot-cause.txt"

# Set the previous reboot cause accordingly
# If this is the first boot after an image install, state that as the
# cause. Otherwise, move REBOOT_CAUSE_FILE to PREVIOUS_REBOOT_CAUSE_FILE.
# REBOOT_CAUSE_FILE should always exist, but we add the else case
# to ensure we always generate PREVIOUS_REBOOT_CAUSE_FILE here
REBOOT_CAUSE_DIR="/host/reboot-cause"
REBOOT_CAUSE_FILE="${REBOOT_CAUSE_DIR}/reboot-cause.txt"
PREVIOUS_REBOOT_CAUSE_FILE="${REBOOT_CAUSE_DIR}/previous-reboot-cause.txt"

mkdir -p $REBOOT_CAUSE_DIR

# If this is the first boot after an image install, store that as the
# previous reboot cause.
if [ -f $FIRST_BOOT_FILE ]; then
echo "SONiC image installation" > $PREVIOUS_REBOOT_CAUSE_FILE
elif [ -f $REBOOT_CAUSE_FILE ]; then
fi

# If there is an existing REBOOT_CAUSE_FILE, copy that file to
# PREVIOUS_REBOOT_CAUSE_FILE.
if [ -f $REBOOT_CAUSE_FILE ]; then
mv -f $REBOOT_CAUSE_FILE $PREVIOUS_REBOOT_CAUSE_FILE
else
echo "Unknown reboot cause" > $PREVIOUS_REBOOT_CAUSE_FILE
fi

# Log the previous reboot cause to the syslog
logger "Previous reboot cause: $(cat $PREVIOUS_REBOOT_CAUSE_FILE)"

# Set the default cause for the next reboot
echo "Unexpected reboot" > $REBOOT_CAUSE_FILE
}
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