Merge pull request #38 from djmaze/add-backup-args

Allow custom backup arguments using RESTIC_BACKUP_ARGS

README.md

@@ -67,6 +67,7 @@ E.g.
 * `RESTIC_REPOSITORY` - location of the restic repository. You can use [any target supported by restic](https://restic.readthedocs.io/en/stable/030_preparing_a_new_repo.html). Default `/mnt/restic`
 * `RESTIC_BACKUP_SOURCES` - source directory to backup. Make sure to mount this into the container as a volume (see the example configs). Default `/data`
 * `RESTIC_PASSWORD` - password for the restic repository. Will also be used to initialize the repository if it is not yet initialized
+* `RESTIC_BACKUP_ARGS` - Optional. Additional arguments given to *restic backup*.
 * `RESTIC_BACKUP_TAGS` - Optional. Tags to set on each snapshot, separated by commas. E.g. `swarm,docker-volumes`
 * `RESTIC_FORGET_ARGS` - Optional. If specified `restic forget` is run with the given arguments after each backup. E.g. `--prune --keep-last 14 --keep-daily 1`
 * (Additional variables as needed for the chosen backup target. E.g. `B2_ACCOUNT_ID` and `B2_ACCOUNT_KEY` for Backblaze B2.)

backup

@@ -29,7 +29,7 @@ start=`date +%s`
 echo Starting Backup at $(date +"%Y-%m-%d %H:%M:%S")
 
 set +e
-restic backup ${tag_options} ${RESTIC_BACKUP_SOURCES}
+restic backup ${RESTIC_BACKUP_ARGS:-} ${tag_options} ${RESTIC_BACKUP_SOURCES}
 if [ $? -ne 0 ]
 then
 	set -e

docker-compose.example.yml

@@ -9,6 +9,7 @@ services:
       RESTIC_REPOSITORY: b2:my-repo:/restic
       RESTIC_PASSWORD: supersecret
       RESTIC_BACKUP_SOURCES: /mnt/volumes
+      #RESTIC_BACKUP_ARGS: -v
       RESTIC_BACKUP_TAGS: docker-volumes
       RESTIC_FORGET_ARGS: --prune --keep-last 14 --keep-daily 1
       B2_ACCOUNT_ID: xxxxxxx

docker-swarm.example.yml

@@ -8,6 +8,7 @@ services:
       RESTIC_REPOSITORY: b2:my-repo:/restic
       RESTIC_PASSWORD: supersecret
       RESTIC_BACKUP_SOURCES: /mnt/volumes
+      #RESTIC_BACKUP_ARGS: -v
       RESTIC_BACKUP_TAGS: docker-volumes
       RESTIC_FORGET_ARGS: --prune --keep-last 14 --keep-daily 1
       B2_ACCOUNT_ID: xxxxxxx