devstack/tools/install_prereqs.sh
Ian Wienand 7710e7fc27 Only use lsb_release for distro tags
The existing GetOSVersion has a lot of unused code which is wrong in
several ways

 - the only path tested in upstream CI is with lsb_release, because
   it's pre-installed on all nodes

 - the /etc/redhat-release checking probably still works, but is
   unnecessary

 - If using lsb_release, os_UPDATE has never actually been set.

 - the /etc/SuSE-release branch checking is broken if the lsb package
   is actually installed.  lsb checking does not set os_UPDATE but yet
   the SuSE DISTRO setting relies on this to set a patch level (and so
   does some of the rpm tags).  SuSE 11 is up to update 3, but the rpm
   matching is stuck hard-coded to update 2.  I'm guessing
   installation is actually broken there.

 - the debian checking branch is broken.  The VERSION tags have been
   removed and were not supposed to be relied on anyway (see notes in
   [1])

This simplifies things:

 - remove OSX checking (moved here after discussions in
   I31d0fdd30928ecc8d959a95838b1d3affd28ac6f)

 - only use the output of lsb_release.

 - A small best-effort check to pre-install lsb packages if not
   detected (that avoids chicken-egg-problem of package-install
   wrappers relying on os_* flags).

 - The unset os_UPDATE is removed.  It's only previous use was for
   setting separate suse versions in the DISTRO element for matching
   during package installs (since removed)

 - DISTRO setting is modified to use the parts of os_RELEASE it wants.
   Per-above, this is the correct place to parse out specifics.

 - Call out the is_* functions, which are a better way to detect
   platforms

 - Export the variables as read-only, since they shouldn't be reset

[1] http://sources.debian.net/src/base-files/7.5/debian/changelog/

Change-Id: I46a2c36d95327087085df07cb797eb91249a893c
2016-01-12 09:23:35 +11:00

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#!/usr/bin/env bash
# **install_prereqs.sh**
# Install system package prerequisites
#
# install_prereqs.sh [-f]
#
# -f Force an install run now
FORCE_PREREQ=0
while getopts ":f" opt; do
case $opt in
f)
FORCE_PREREQ=1
;;
esac
done
# If ``TOP_DIR`` is set we're being sourced rather than running stand-alone
# or in a sub-shell
if [[ -z "$TOP_DIR" ]]; then
# Keep track of the DevStack directory
TOP_DIR=$(cd $(dirname "$0")/.. && pwd)
# Import common functions
source $TOP_DIR/functions
# Determine what system we are running on. This provides ``os_VENDOR``,
# ``os_RELEASE``, ``os_PACKAGE``, ``os_CODENAME``
# and ``DISTRO``
GetDistro
# Needed to get ``ENABLED_SERVICES``
source $TOP_DIR/stackrc
# Prereq dirs are here
FILES=$TOP_DIR/files
fi
# Minimum wait time
PREREQ_RERUN_MARKER=${PREREQ_RERUN_MARKER:-$TOP_DIR/.prereqs}
PREREQ_RERUN_HOURS=${PREREQ_RERUN_HOURS:-2}
PREREQ_RERUN_SECONDS=$((60*60*$PREREQ_RERUN_HOURS))
NOW=$(date "+%s")
LAST_RUN=$(head -1 $PREREQ_RERUN_MARKER 2>/dev/null || echo "0")
DELTA=$(($NOW - $LAST_RUN))
if [[ $DELTA -lt $PREREQ_RERUN_SECONDS && -z "$FORCE_PREREQ" ]]; then
echo "Re-run time has not expired ($(($PREREQ_RERUN_SECONDS - $DELTA)) seconds remaining) "
echo "and FORCE_PREREQ not set; exiting..."
return 0
fi
# Make sure the proxy config is visible to sub-processes
export_proxy_variables
# Install Packages
# ================
# Install package requirements
PACKAGES=$(get_packages general,$ENABLED_SERVICES)
PACKAGES="$PACKAGES $(get_plugin_packages)"
if is_ubuntu && echo $PACKAGES | grep -q dkms ; then
# Ensure headers for the running kernel are installed for any DKMS builds
PACKAGES="$PACKAGES linux-headers-$(uname -r)"
fi
install_package $PACKAGES
if [[ -n "$SYSLOG" && "$SYSLOG" != "False" ]]; then
if is_ubuntu || is_fedora; then
install_package rsyslog-relp
elif is_suse; then
install_package rsyslog-module-relp
else
exit_distro_not_supported "rsyslog-relp installation"
fi
fi
if python3_enabled; then
install_python3
fi
# Mark end of run
# ---------------
date "+%s" >$PREREQ_RERUN_MARKER
date >>$PREREQ_RERUN_MARKER