On 12/01/17 16:17, Charles wrote:
...
> To be thorough, the bacula-sd init script should not only run the mt
> rewoffl and mtx unload commands; it should also error trap their output.
>  I suspect that, when our autoloader and backup server are powered up at
> the same time, the autoloader does not finish initialising before the
> backup server runs the bacula-sd init script.  In which case the mt and
> mtx commands are ineffective and SD finds a tape in the drive resulting
> in the tape getting Bacula status Error.
>
> More after I have tested error trapping the mt rewoffl and mtx unload
> commands.

Here's my solution.  Beware of line wraps.


[email protected]:~# diff -u /etc/init.d/bacula-sd{.org,}
--- /etc/init.d/bacula-sd.org   2016-08-17 16:15:12.000000000 +0530
+++ /etc/init.d/bacula-sd       2017-01-15 20:08:37.125034780 +0530
@@ -20,6 +20,10 @@
  #       Customized for Bacula by Jose Luis Tallon 
<jltallon AT adv-solutions DOT net>
  #

+# 15 Jan 2017 Charles for Support #3484 "autoloader1.iciti.av: cartridge
+#    AS0008L6: media error"
+#    * Added AUTOLOADER_INIT
+
  set -e

  PATH=/sbin:/bin:/usr/sbin:/usr/bin
@@ -42,6 +46,7 @@

  CONFIG="${CONFIG:-/etc/bacula/$NAME.conf}"
  STOPTIMEOUT="${STOPTIMEOUT:-180}"
+AUTOLOADER_INIT="${AUTOLOADER_INIT:-/usr/local/etc/init.d/bacula-sd-autoloader}"

  create_var_run_dir

@@ -50,6 +55,15 @@
  do_start()
  {
        if $DAEMON -t -c $CONFIG $ARGS > /dev/null 2>&1; then
+        if [ -x "$AUTOLOADER_INIT" ]; then
+                   log_progress_msg "- running $AUTOLOADER_INIT"
+            "$AUTOLOADER_INIT"
+            if [ $? != 0 ]]; then
+               log_failure_msg \
+               "Not starting $DESC: could not initialise autoloader"
+                      return 1
+            fi
+        fi
                start-stop-daemon --start --quiet --pidfile $PIDFILE \
                --oknodo --exec $DAEMON -- -c $CONFIG $ARGS
                return 0


[email protected]:~# cat /usr/local/etc/init.d/bacula-sd-autoloader
#!/bin/bash

# Copyright (C) 2017 Charles Atkinson
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA

# Helper script for /etc/init.d/bacula-sd.
# Ensures the autoloader is suitably initialised

# Usage:
#   * No arguments or options
#   * Configuration by /etc/default/bacula-sd-autoloader
#   * Intended to be called by /etc/init.d/bacula-sd
#   * /etc/init.d/bacula-sd should fail if this script returns non-zero

# 15 Jan 2017 Charles Atkinson
#   * Creation

# Do nothing if bacula-sd is already running
netstat -plnt | grep -q bacula-sd && exit 0

# Configuration
PATH=/sbin:/bin:/usr/sbin:/usr/bin
NAME=bacula-sd-autoloader

. /lib/lsb/init-functions
if [[ -r /etc/default/$NAME ]]; then
     . /etc/default/$NAME
else
     log_failure_msg "Not initalising autoloader: /etc/default/$NAME 
does not exist"
     exit 1
fi

if [[ $AUTOLOADER_DEV = '' ]]; then
     log_failure_msg "Not initalising autoloader: /etc/default/$NAME did 
not set AUTOLOADER_DEV"
     exit 1
fi

if [[ $TAPE_DEV = '' ]]; then
     log_failure_msg "Not initalising autoloader: /etc/default/$NAME did 
not set TAPE_DEV"
     exit 1
fi

TIMEOUT=${TIMEOUT:60}

# Initialise the autoloader
declare -r rewoffl_OK_regex='^$|rmtopen failed: No medium found$'
declare -r unload_OK_regex='^(Unloading drive 0 into Storage Element 
[[:digit:]]\.+done|Data Transfer Element 0 is Empty)$'

start_time=$(date +%s)
while true
do
     err_count=0
     err_msg=

     buf=$(mt -f "$TAPE_DEV" rewoffl 2>&1)
     if [[ ! $buf =~ $rewoffl_OK_regex ]]; then
        err_msg+=$'\n'$buf
        ((err_count++))
     fi

     buf=$(mtx -f "$AUTOLOADER_DEV" unload 2>&1)
     if [[ ! $buf =~ $unload_OK_regex ]]; then
        err_msg+=$'\n'$buf
        ((err_count++))
     fi
     ((err_count==0)) && break

     now_time=$(date +%s)
     if ((now_time-start_time>TIMEOUT)); then
         log_failure_msg "Unable to initalise autoloader: $err_msg"
         exit 1
     fi
done

exit 0


[email protected]:~# cat /etc/default/bacula-sd-autoloader
# Configuration sccript for /usr/local/etc/init.d/bacula-sd-autoloader

# Required conf values
AUTOLOADER_DEV=/dev/sg5
TAPE_DEV=/dev/st0

# Optional conf value
#TIMEOUT=120    # Seconds to wait for autoloader to become available. 
Default 60


Best

Charles

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