Support multiple databases through POSTGRES_DATABASE

src/backup.sh

@@ -5,47 +5,54 @@ set -o pipefail
 
 source ./env.sh
 
-echo "Creating backup of $POSTGRES_DATABASE database..."
-pg_dump --format=custom \
-        -h $POSTGRES_HOST \
-        -p $POSTGRES_PORT \
-        -U $POSTGRES_USER \
-        -d $POSTGRES_DATABASE \
-        $PGDUMP_EXTRA_OPTS \
-        > db.dump
-
-timestamp=$(date +"%Y-%m-%dT%H:%M:%S")
-s3_uri_base="s3://${S3_BUCKET}/${S3_PREFIX}/${POSTGRES_DATABASE}_${timestamp}.dump"
-
-if [ -n "$PASSPHRASE" ]; then
-  echo "Encrypting backup..."
-  rm -f db.dump.gpg
-  gpg --symmetric --batch --passphrase "$PASSPHRASE" db.dump
-  rm db.dump
-  local_file="db.dump.gpg"
-  s3_uri="${s3_uri_base}.gpg"
-else
-  local_file="db.dump"
-  s3_uri="$s3_uri_base"
-fi
-
-echo "Uploading backup to $S3_BUCKET..."
-aws $aws_args s3 cp "$local_file" "$s3_uri"
-rm "$local_file"
-
-echo "Backup complete."
-
-if [ -n "$BACKUP_KEEP_DAYS" ]; then
-  sec=$((86400*BACKUP_KEEP_DAYS))
-  date_from_remove=$(date -d "@$(($(date +%s) - sec))" +%Y-%m-%d)
-  backups_query="Contents[?LastModified<='${date_from_remove} 00:00:00'].{Key: Key}"
-
-  echo "Removing old backups from $S3_BUCKET..."
-  aws $aws_args s3api list-objects \
-    --bucket "${S3_BUCKET}" \
-    --prefix "${S3_PREFIX}" \
-    --query "${backups_query}" \
-    --output text \
-    | xargs -n1 -t -I 'KEY' aws $aws_args s3 rm s3://"${S3_BUCKET}"/'KEY'
-  echo "Removal complete."
-fi
+OIFS="$IFS"
+IFS=','
+for DB in $POSTGRES_DATABASE
+do
+  IFS="$OIFS"
+
+  echo "Creating backup of $DB database..."
+  pg_dump --format=custom \
+      -h $POSTGRES_HOST \
+      -p $POSTGRES_PORT \
+      -U $POSTGRES_USER \
+      -d $DB \
+      $PGDUMP_EXTRA_OPTS \
+      > db.dump
+
+  timestamp=$(date +"%Y-%m-%dT%H:%M:%S")
+  s3_uri_base="s3://${S3_BUCKET}/${S3_PREFIX}/${DB}_${timestamp}.dump"
+
+  if [ -n "$PASSPHRASE" ]; then
+    echo "Encrypting backup..."
+    rm -f db.dump.gpg
+    gpg --symmetric --batch --passphrase "$PASSPHRASE" db.dump
+    rm db.dump
+    local_file="db.dump.gpg"
+    s3_uri="${s3_uri_base}.gpg"
+  else
+    local_file="db.dump"
+    s3_uri="$s3_uri_base"
+  fi
+
+  echo "Uploading backup to $S3_BUCKET..."
+  aws $aws_args s3 cp "$local_file" "$s3_uri"
+  rm "$local_file"
+
+  echo "Backup complete."
+
+  if [ -n "$BACKUP_KEEP_DAYS" ]; then
+    sec=$((86400*BACKUP_KEEP_DAYS))
+    date_from_remove=$(date -d "@$(($(date +%s) - sec))" +%Y-%m-%d)
+    backups_query="Contents[?LastModified<='${date_from_remove} 00:00:00'].{Key: Key}"
+
+    echo "Removing old backups from $S3_BUCKET..."
+    aws $aws_args s3api list-objects \
+      --bucket "${S3_BUCKET}" \
+      --prefix "${S3_PREFIX}" \
+      --query "${backups_query}" \
+      --output text \
+      | xargs -n1 -t -I 'KEY' aws $aws_args s3 rm s3://"${S3_BUCKET}"/'KEY'
+    echo "Removal complete."
+  fi
+done
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