From b74f2182d98a8c8e0e88c9d7fb4d2c52c72c0edf Mon Sep 17 00:00:00 2001
From: Pau Rodriguez-Estivill <prodrigestivill@gmail.com>
Date: Sat, 30 Jun 2018 14:07:22 +0200
Subject: [PATCH] Added support for multiple databases. Closes #1

---
 README.md |  1 +
 backup.sh | 25 +++++++++++++++----------
 2 files changed, 16 insertions(+), 10 deletions(-)

diff --git a/README.md b/README.md
index 34f763d..e198375 100644
--- a/README.md
+++ b/README.md
@@ -2,6 +2,7 @@
 
 Backup PostgresSQL to local filesystem with periodic backups and rotate backups.
 Based on [schickling/postgres-backup-s3](https://hub.docker.com/r/schickling/postgres-backup-s3/).
+It can backup multiple databases from the same host by setting all databases in `POSTGRES_DB` separated by comas or spaces.
 
 ## Usage
 
diff --git a/backup.sh b/backup.sh
index 3d5d96f..0fe31af 100755
--- a/backup.sh
+++ b/backup.sh
@@ -34,19 +34,24 @@ KEEP_DAYS=$BACKUP_KEEP_DAYS
 KEEP_WEEKS=`expr $((($BACKUP_KEEP_WEEKS * 7) + 1))`
 KEEP_MONTHS=`expr $((($BACKUP_KEEP_MONTHS * 31) + 1))`
 
-#Initialize filename vers and dirs
-DFILE="$BACKUP_DIR/daily/$POSTGRES_DB-`date +%Y%m%d-%H%M%S`.sql.gz"
-WFILE="$BACKUP_DIR/weekly/$POSTGRES_DB-`date +%G%V`.sql.gz"
-MFILE="$BACKUP_DIR/monthly/$POSTGRES_DB-`date +%Y%m`.sql.gz"
+#Initialize dirs
 mkdir -p "$BACKUP_DIR/daily/" "$BACKUP_DIR/weekly/" "$BACKUP_DIR/monthly/"
 
-#Create dump
-echo "Creating dump of ${POSTGRES_DB} database from ${POSTGRES_HOST}..."
-pg_dump -f "$DFILE" $POSTGRES_HOST_OPTS $POSTGRES_DB
+#Loop all databases
+for DB in $(echo $POSTGRES_DB | tr , " "); do
+    #Initialize filename vers
+    DFILE="$BACKUP_DIR/daily/$DB-`date +%Y%m%d-%H%M%S`.sql.gz"
+    WFILE="$BACKUP_DIR/weekly/$DB-`date +%G%V`.sql.gz"
+    MFILE="$BACKUP_DIR/monthly/$DB-`date +%Y%m`.sql.gz"
 
-#Copy (hardlink) for each entry
-ln -vf "$DFILE" "$WFILE"
-ln -vf "$DFILE" "$MFILE"
+    #Create dump
+    echo "Creating dump of ${DB} database from ${POSTGRES_HOST}..."
+    pg_dump -f "$DFILE" $POSTGRES_HOST_OPTS $DB
+
+    #Copy (hardlink) for each entry
+    ln -vf "$DFILE" "$WFILE"
+    ln -vf "$DFILE" "$MFILE"
+done
 
 #Clean old files
 find "$BACKUP_DIR/daily" -maxdepth 1 -mtime +$KEEP_DAYS -name "$POSTGRES_DB-*.sql*" -exec rm -rf '{}' ';'