Added static filename to list of environment variable options

mysql-backup-s3/Dockerfile

@@ -17,6 +17,7 @@ ENV S3_REGION us-west-1
 ENV S3_ENDPOINT **None**
 ENV S3_S3V4 no
 ENV S3_PREFIX 'backup'
+ENV S3_FILENAME **None**
 ENV MULTI_FILES no
 ENV SCHEDULE **None**
 

mysql-backup-s3/README.md

@@ -20,6 +20,7 @@ $ docker run -e S3_ACCESS_KEY_ID=key -e S3_SECRET_ACCESS_KEY=secret -e S3_BUCKET
 - `S3_SECRET_ACCESS_KEY` your AWS secret key *required*
 - `S3_BUCKET` your AWS S3 bucket path *required*
 - `S3_PREFIX` path prefix in your bucket (default: 'backup')
+- `S3_FILENAME` a consistent filename to overwrite with your backup.  If not set will use a timestamp.
 - `S3_REGION` the AWS S3 bucket region (default: us-west-1)
 - `S3_ENDPOINT` the AWS Endpoint URL, for S3 Compliant APIs such as [minio](https://minio.io) (default: none)
 - `S3_S3V4` set to `yes` to enable AWS Signature Version 4, required for [minio](https://minio.io) servers (default: no)

mysql-backup-s3/backup.sh

@@ -76,7 +76,11 @@ if [ ! -z "$(echo $MULTI_FILES | grep -i -E "(yes|true|1)")" ]; then
     mysqldump $MYSQL_HOST_OPTS $MYSQLDUMP_OPTIONS --databases $DB | gzip > $DUMP_FILE
 
     if [ $? == 0 ]; then
-      S3_FILE="${DUMP_START_TIME}.${DB}.sql.gz"
+      if [ "${S3_FILENAME}" == "**None**" ]; then
+        S3_FILE="${DUMP_START_TIME}.${DB}.sql.gz"
+      else
+        S3_FILE="${S3_FILENAME}.${DB}.sql.gz"
+      fi
 
       copy_s3 $DUMP_FILE $S3_FILE
     else
@@ -91,7 +95,11 @@ else
   mysqldump $MYSQL_HOST_OPTS $MYSQLDUMP_OPTIONS $MYSQLDUMP_DATABASE | gzip > $DUMP_FILE
 
   if [ $? == 0 ]; then
-    S3_FILE="${DUMP_START_TIME}.dump.sql.gz"
+    if [ "${S3_FILENAME}" == "**None**" ]; then
+      S3_FILE="${DUMP_START_TIME}.dump.sql.gz"
+    else
+      S3_FILE="${S3_FILENAME}.sql.gz"
+    fi
 
     copy_s3 $DUMP_FILE $S3_FILE
   else