diskimage-builder/diskimage_builder/elements/stable-interface-names/install.d/02-stable-interface-names

#!/bin/bash

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

# remove softlink to /dev/null which disables these rules
NET_NAME_SLOT_FILE="/etc/udev/rules.d/80-net-name-slot.rules"
if [ -h $NET_NAME_SLOT_FILE ]; then
    rm $NET_NAME_SLOT_FILE
fi
baremetal element: Enable stable interface names By default most cloud images have disabled the udev rules which give us stable network interface names. While this is a reasonable default for something like EC2 (the target for these images) this is very bad behavour on bare metal and can cause a "musical NICs" situation to occur where on reboot the NIC names get swapped. In this commit we re-enable stable interface naming by removing the dev nulled rules softlink and installing the biosdevname package. Once this is done interface names should again show up as em1, em2 instead of the old eth0, eth1. We also remove some the common, statically configured eth0 config files on some distributions. Equivalent files (if needed) may be auto-generated by using the dhcp-all-interfaces element. Change-Id: Idd67977342719e2f295e2fa2c0ed6cfa8602171a 2014-02-07 21:18:28 +00:00			`#!/bin/bash`

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 2014-09-04 04:56:29 +00:00			`if [ ${DIB_DEBUG_TRACE:-0} -gt 0 ]; then`
			`set -x`
			`fi`
set -e all the things Using set -e in all of our scripts will prevent some subtle bugs from slipping in, and will allow us to enforce use of set -e with tooling. This change also adds -u and set -o pipefail in the less complex scripts where it is unlikely to cause problems. A follow-up change will enable those options in the complex scripts so that if it breaks something it can be reverted easily. Change-Id: I0ad358ccb98da7277a0ee2e9ce8fda98438675eb 2014-03-29 03:28:22 +00:00			`set -eu`
			`set -o pipefail`

baremetal element: Enable stable interface names By default most cloud images have disabled the udev rules which give us stable network interface names. While this is a reasonable default for something like EC2 (the target for these images) this is very bad behavour on bare metal and can cause a "musical NICs" situation to occur where on reboot the NIC names get swapped. In this commit we re-enable stable interface naming by removing the dev nulled rules softlink and installing the biosdevname package. Once this is done interface names should again show up as em1, em2 instead of the old eth0, eth1. We also remove some the common, statically configured eth0 config files on some distributions. Equivalent files (if needed) may be auto-generated by using the dhcp-all-interfaces element. Change-Id: Idd67977342719e2f295e2fa2c0ed6cfa8602171a 2014-02-07 21:18:28 +00:00			`# remove softlink to /dev/null which disables these rules`
			`NET_NAME_SLOT_FILE="/etc/udev/rules.d/80-net-name-slot.rules"`
			`if [ -h $NET_NAME_SLOT_FILE ]; then`
			`rm $NET_NAME_SLOT_FILE`
			`fi`