diskimage-builder/elements/dracut-ramdisk/extra-data.d/scripts/module/deploy-cmdline.sh
Ian Wienand 36b59c001c Standarise tracing for scripts
There is a wide variety of tracing options through the various shell
scripts.  Some use "set -eux", others explicity set xtrace and others
do nothing.  There is a "-x" option to bin/disk-image-create but it
doesn't flow down to the many scripts it calls.

This adds a global integer variable set by disk-image-create
DIB_DEBUG_TRACE.  All scripts have a stanza added to detect this and
turn on tracing.  Any other tracing methods are rolled into this.  So
the standard header is

---
if [ "${DIB_DEBUG_TRACE:-0}" -gt 0 ]; then
    set -x
fi
set -eu
set -o pipefail
---

Multiple -x options can be specified to dib-create-image, which
increases the value of DIB_DEBUG_TRACE.  If script authors feel their
script should only trace at higher levels, they should modify the
"-gt" value.  If they feel it should trace by default, they can modify
the default value also.

Changes to pachset 16 : scripts which currently trace themselves by
default have retained this behaviour with DIB_DEBUG_TRACE defaulting
to "1".  This was done by running [1] on patch set 15.  See the thread
beginning at [2]

dib-lint is also updated to look for the variable being matched.

[1] https://gist.github.com/ianw/71bbda9e6acc74ccd0fd
[2] http://lists.openstack.org/pipermail/openstack-dev/2014-November/051575.html

Change-Id: I6c5a962260741dcf6f89da9a33b96372a719b7b0
2015-02-12 10:41:32 +11:00

18 lines
665 B
Bash
Executable file

#!/bin/bash
# NOTE(bnemec): Dracut doesn't like it if we enable these
# dib-lint: disable=setu sete setpipefail dibdebugtrace
# We never let Dracut boot off the specified root anyway, so all
# we need is a value it will accept.
root=/dev/zero
rootok=1
# Dracut doesn't correctly parse the ip argument passed to us.
# Override /proc/cmdline to rewrite it in a way dracut can grok.
sed 's/\(ip=\S\+\)/\1:::off/' /proc/cmdline > /run/cmdline
# Map the existing "troubleshoot" kernel param to the Dracut equivalent.
sed -i 's/troubleshoot=/rd.shell=/' /run/cmdline
mount -n --bind -o ro /run/cmdline /proc/cmdline
# Force Dracut to re-read the cmdline args
CMDLINE=