X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;ds=sidebyside;f=plc.d%2Fdb;h=8f5fc14cda557af5298f80bbd555216220cdf1ac;hb=391310e122de0536c08f62bd46acd3b3b7b13964;hp=b249ca95712923fd419cc504a308fdf80a9fd8d0;hpb=40608f0c316b6d0a3e5c2dbdfcdb2316e5e8c0eb;p=myplc.git

diff --git a/plc.d/db b/plc.d/db
index b249ca9..8f5fc14 100755
--- a/plc.d/db
+++ b/plc.d/db
@@ -7,7 +7,7 @@
 # Mark Huang <mlhuang@cs.princeton.edu>
 # Copyright (C) 2006 The Trustees of Princeton University
 #
-# $Id$
+# $Id: db 316 2007-04-24 17:25:09Z thierry $
 #
 
 # Source function library and configuration
@@ -20,15 +20,72 @@ set -x
 # Export so that we do not have to specify -p to psql invocations
 export PGPORT=$PLC_DB_PORT
 
-case "$1" in
-    start)
-	if [ "$PLC_DB_ENABLED" != "1" ] ; then
-	    exit 0
+# Updates the database by applying all migration scripts in
+# /usr/share/plc_api/migrations/N-up-*, where N is greater than the
+# current subversion. At least one of the migration scripts with the
+# same N must update plc_db_version.subversion.
+function migrate_db()
+{
+    subversion=$(psql -U $PLC_DB_USER --quiet --tuples-only --no-align -c \
+	         "SELECT subversion FROM plc_db_version LIMIT 1" \
+	         $PLC_DB_NAME 2>/dev/null || echo 0)
+    shopt -s nullglob
+    for file in /usr/share/plc_api/migrations/[0-9]*-up-* ; do
+	script=$(basename $file)
+	index=${script%-up*}
+	extension=${script##*.}
+	if [ $index -gt $subversion ] ; then
+	    if [ "$extension" = "sql" ] ; then
+	        dialog " - $script (dbdumped)"
+	        dump_planetlab_db "before-$script"
+		psql -U $PLC_DB_USER -f $file $PLC_DB_NAME
+	    elif [ -x $file ] ; then
+	        dialog " - $script (dbdumped)"
+	        dump_planetlab_db "before-$script"
+		$file
+	    else
+	        dialog "\nWarning: migration $file not executable"
+	    fi
+	    check
 	fi
+    done
+}
+
+# Dumps the database - optional argument to specify filename suffix
+function dump_planetlab_db()
+{
+    if [ -n "$1" ] ; then suffix="-$1" ; else suffix="" ; fi
+    dump=/var/lib/pgsql/backups/$(date +"$PLC_DB_NAME.%Y-%m-%d-%H-%M-%S${suffix}.sql")
+    pg_dump -U $PLC_DB_USER $PLC_DB_NAME > $dump
+    check
+}
+
+function dump_drupal_db()
+{
+    dump=/var/lib/pgsql/backups/$(date +"drupal.%Y-%m-%d-%H-%M-%S.sql")
+    pg_dump -U $PLC_DB_USER drupal > $dump
+    check
+}
 
+# Clean up old backups
+function clean_dumps()
+{
+    find /var/lib/pgsql/backups '(' -name "$PLC_DB_NAME.*.sql" -o -name "drupal.*.sql" ')' -a -atime +15 | xargs rm -f
+    check
+}
+
+if [ "$PLC_DB_ENABLED" != "1" ] ; then
+    exit 0
+fi
+
+case "$1" in
+    start)
 	MESSAGE=$"Bootstrapping the database"
 	dialog "$MESSAGE"
 
+	# Apply schema updates
+	migrate_db
+
 	# Update the maintenance account username. This can't be
 	# done through the api-config script since it uses the
 	# maintenance account to access the API. The maintenance
@@ -48,6 +105,36 @@ EOF
 
 	result "$MESSAGE"
 	;;
+
+    migrate)
+	MESSAGE=$"Migrating the database"
+	dialog "$MESSAGE"
+
+	migrate_db
+	result "$MESSAGE"
+	;;
+
+    dump)
+      	MESSAGE=$"Dumping the databases in /var/lib/pgsql/backups"
+	dialog "$MESSAGE"
+
+	dump_planetlab_db
+	dump_drupal_db
+	result "$MESSAGE"
+	;;
+
+    clean-dump)
+      	MESSAGE=$"Cleaning old database dumps"
+	dialog "$MESSAGE"
+
+	clean_dumps
+	result "$MESSAGE"
+	;;
+
+    *)
+        echo "Usage: $0 [start|migrate|dump|clean-dump]"
+	exit 1
+	;;
 esac
 
 exit $ERRORS