newbury at mandamus
Jul 18, 2012, 10:44 AM
Post #10 of 25
(999 views)
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Re: Help needed for RPM Fusion package modernizaton
[In reply to]
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On 07/18/2012 10:47 AM, Gary Buhrmaster wrote:
> On Wed, Jul 18, 2012 at 6:54 AM, Daniel Thor Kristjansson
> <danielk [at] cuymedia> wrote:
> ....
>>>> 2. Right now on sysv systems both HOME and MTYHCONFDIR are being set
>>
>>
>> Dunno about this. MYTHCONFDIR is used both to locate configuration
>> files and as a location for caches. It would make a lot of sense
>> to allow caches to go somewhere else.
>
> sysv scripts are mostly dead for Fedora (EOL for F15 has
> already happened). Ignore them, let then die in piece.
>
> In my opinion, the defaults should be to run as a "regular user",
> with no need to read/write to system directories. The mythtv
> user should be created if it does not exist. HOME should
> not need to be set in the systemd scripts when the User=mythtv
> line exists in the systemd script. Any configuration that is
> required for operation commonly created in /etc, /usr,
> should be copied to the (RPM created, if does not exist) mythtv
> user's .mythrv/ directory, using the RPM standards of "...rpmnew"
> if the configuration already exists and is different than the file
> you are trying to install (to the normal/correct name if the
> file does not exist). The mythtv user should be added to the
> video and audio groups if the mythtv user is created by the RPM.
> The startup scripts should specify the user mythtv as the user
> to run the backend. Create an appropriate /etc/limit.d/90-mythtv.conf
> file to set the audio group for rtprio.
>
> An individual can always override all of these things in their
> copy of the service file that they place in /etc/systemd/system
> (and/or modify the ~mythtv/.mythtv/ files, as needed).
>
And I will add, that the RPM should also create the /var/log/mythtv
folder, and chown it to mythtv as well as /run/mythtv (or
/var/run/mythtv) for the pid file
I have found that systemd has problems with creating /run, so I am using
/var/log/mythtv/ for the pid file. Also systemd has problems running
/etc/rc.d/rc.local so you cannot be sure that everything properly exists
on reboot if it used to be set there.
I run a pre-start script in the service file, to make sure that
everything is correct. I think it now needs to be type=forking,
otherwise the mythlogserver process becomes an orphan (with type=simple)
and a blocker to any restart. (systemctl may fail to start the backend
with any visible error message)
This is the pre-start.sh, but everything in it needs to be in the
install too I think.
# *****************************************************************
#!/bin/bash
# pre-start.sh script for systemd (replacing /etc/init.d/mythbackend)
USERNAME="mythtv"
PASSWORD="mythtv"
# in this case a non-usual home for mythtv user
export HOME=/var/log/mythtv
export MYTHTV_HOME=/var/log/mythtv
# UTF encoding needed by myth
export LC_ALL=en_US.UTF-8
# Check for user, create if missing, create HOME too
RESULT=""
# if user exists, will be in /etc/passwd file
RESULT=`grep "$USERNAME" /etc/passwd`;
if [ "$RESULT" == "" ]; then
echo "Mythtv user not found, user account will be created"
useradd -m -d "$HOME" -G mysql -p "$PASSWORD" -U "$USERNAME" 2>&1
usermod -a -G audio,video mythtv 2>&1;
# else
# echo "User exists, no action taken";
fi
# Required sanity checks
if [ ! -x /var/log/mythtv ]; then
# make logging folder
mkdir -p -m 755 /var/log/mythtv
chown -hR mythtv:mythtv /var/log/mythtv
fi
# make pid folder even if using /var/log/mythtv
# sudo as may be called by mythtv user
sudo mkdir -p -m 755 /var/run/mythtv
sudo chown -hR mythtv:mythtv /var/run/mythtv
# and again to be sure
sudo mkdir -p -m 755 /run/mythtv
sudo chown -hR mythtv:mythtv /run/mythtv
# ******************
# below here, only for the pre-start script to clean up
# any existing errors on a restart.
# An 'is-running' check
# Kill any running process as a start has been initiated
$ the 'proper' pidfile
if [ -e /run/mythtv/backend.pid ]; then
sudo rm -f /run/mythtv/backend.pid
fi
# the alternate pidfile
if [ -e /var/log/mythtv/backend.pid ]; then
sudo rm -f /var/log/mythtv/backend.pid
fi
sudo killall mythlogserver 2&>1
sudo killall mythbackend 2&>1
# echo "Now ready to start mythbackend,service
# ********************************************
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