openstack-ansible-os_nova/files/nova_kernel_permissions
cmart 7ad805df1f Fix kernel post-installation script
`/etc/kernel/postinst.d/nova-kernel-permissions.sh` (introduced to fix Bug #1507915) is supposed to make newly installed kernels readable to the nova user, as kernels on an Ubuntu system are otherwise only readable to the root user [0].

This script didn't work for a few reasons:

- It never ran, because scripts in `/etc/kernel/postinst.d` are called by `run-parts`, and run-parts skips any script with a period in the name [1].
- Its shebang was missing its bang
- If installation of the same kernel is installed more than once (e.g. reinstallation), `dpkg-statoverride` (and the whole kernel installation) would exit with error, complaining about an override already existing [2].

Fixed with these changes respectively:
- Renamed script to remove the period
- Fixed typo in shebang
- Added `--force` flag to `dpkg-statoverride`

[0] https://bugs.launchpad.net/ubuntu/+source/linux/+bug/759725
[1] https://bugs.launchpad.net/ubuntu/+source/debianutils/+bug/38022
[2] https://bugs.launchpad.net/openstack-manuals/+bug/1275080

Change-Id: I0e130e3c3ecf2171dbdc0e9a809f8066c30d4bc9
Closes-Bug: 1763479
2018-04-12 14:58:30 -04:00

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#!/bin/sh
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
set -e
version="$1"
if [ -z "$version" ]; then
exit 0
fi
exec dpkg-statoverride --force --update --add root nova 0640 "/boot/vmlinuz-${version}"