This is proposed wiki how-to. I thought I'd roll it out here first to
elicit comments. Anyone please chime in here. If I receive enough
positive feedback, I'll author a wiki page on this topic.
Goal:
Using minimal download bandwidth and a minimal on-disc footprint, allow
one to run any branch of squeezeboxserver / logitechmediaserver as a
service and to easily allow switching between installed branches.
Assumptions:
- Running on Ubuntu or some debian based distro.
- Service will run under the user account 'lms'.
- Local git repository will reside at /usr/share/lms/server.
- We'll create separate data and log directories for any branch we're
going to run.
- Those data and log dirs will be at /var/lib/lms_data/${BRANCHNAME}
and /var/log/lms_log/${BRANCHNAME}
- Those data and log dirs will be linked to /var/lib/lms and
/var/log/lms
- We'll create a generic 'lms' service for running the code.
- We'll have a script for easily switching between branches.
Preparation:
Become root
Code:
--------------------
sudo su
--------------------
Create the lms user account:
Code:
--------------------
useradd --gid nogroup --no-create-home --no-user-group --system --shell
/bin/false "lms"
--------------------
Download the latest version of the repo:
Code:
--------------------
git clone -n --depth 1 https://github.com/Logitech/slimserver.git
/usr/share/lms/server
--------------------
Note: by downloading only the latest revisions for every branch, we keep
the downloaded object file to about 250M. Remove the "--depth 1" from
that command to make previous revisions available.
Checkout branch 7.8
Code:
--------------------
cd /usr/share/lms/server
git checkout 7.8
--------------------
Create data and log dirs for the 7.8 branch
Code:
--------------------
mkdir -p /var/lib/lms_data/7.8
chown -R lms:nogroup /var/lib/lms_data
mkdir -p /var/log/lms_log/7.8
chown -R lms:nogroup /var/log/lms_log
--------------------
Create links to the data and log dirs..
Code:
--------------------
ln -s /var/lib/lms /var/lib/lms_data/7.8
ln -s /var/log/lms /var/log/lms_log/7.8
--------------------
Create a defaults file for the service..
/etc/default/lms:
Code:
--------------------
SLIMDESC='LMS branch 7.8 git code'
SLIMUSER='lms'
SLIMOPTIONS=''
--------------------
Create a service control script..
/etc/init.d/lms:
Code:
--------------------
TBD
--------------------
Create a service safe script..
/usr/sbin/lms_safe:
Code:
--------------------
TBD
--------------------
Create a log rotate script..
/etc/logrotate.d/lms:
Code:
--------------------
TBD
--------------------
Create service control links:
Code:
--------------------
update-rc.d -f lms remove >/dev/null 2>&1
update-rc.d -f lms defaults
--------------------
Create a branch switching script:
/usr/local/sbin/lms-switch-branch.sh
Code:
--------------------
#!/bin/sh
NEWBRANCH='7.8'
ISGOODBRANCH=0
#Discard local changes...
DISCARD=0
#Update repo
UPDATE=0
if [ ! -z "$1" ]; then
NEWBRANCH="$1"
fi
# Change to the repo dir..
cd /usr/share/lms/server
# Get a list of the available branches..
BRANCHES=`git branch -r | sed -n -e 's#^.*origin/\(.*\)$#\1#p'`
for BRANCH in $BRANCHES
do
if [ "$NEWBRANCH" = "$BRANCH" ]; then
ISGOODBRANCH=1
fi
done
if [ $ISGOODBRANCH -lt 1 ]; then
echo "Error: ${NEWBRANCH} is not a branch of
github.com/Logitech/slimserver.git"
exit 1
fi
# Stop the service..
service lms stop
# Do a hard reset of the repo to discard any local changes..
if [ $DISCARD -gt 0 ]; then
git reset --hard
git clean -fd
fi
# Switch to the new branch
git checkout "$NEWBRANCH"
# Update the repo
if [ $UPDATE -gt 0 ]; then
git pull
fi
# Create new data & log dirs..
LIBDIR="/var/lib/lms_data/${NEWBRANCH}"
LOGDIR="/var/log/lms_log/${NEWBRANCH}"
if [ ! -d "$LIBDIR" ]; then
mkdir -p "$LIBDIR"
fi
if [ ! -d "$LOGDIR" ]; then
mkdir -p "$LOGDIR"
fi
# Fix permissions
chown -r lms:nogroup "$LIBDIR"
chown -r lms:nogroup "$LOGDIR"
# Create new data & log links
LIBDIRLINK='/var/lib/lms'
LOGDIRLINK='/var/log/lms'
if [ -L "$LIBDIRLINK" ]; then
rm "$LIBDIRLINK"
fi
if [ ! -d "$LIBDIRLINK" ]; then
ln -s "$LIBDIRLINK" "/var/lib/lms_data/${NEWBRANCH}"
fi
if [ -L "$LOGDIRLINK" ]; then
rm "$LOGDIRLINK"
fi
if [ ! -d "$LOGDIRLINK" ]; then
ln -s "$LOGDIRLINK" "/var/log/lms_log/${NEWBRANCH}"
fi
# Restart the service..
service lms start
exit $?
--------------------
That's it for now. I haven't included the service control scripts, etc.
Mostly, I'm looking for comments here on the advisability of this
approach.
------------------------------------------------------------------------
gharris999's Profile: http://forums.slimdevices.com/member.php?userid=115
View this thread: http://forums.slimdevices.com/showthread.php?t=95169
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