Working cron again, d'oh

README.md

@@ -6,11 +6,13 @@ Automatically take backups from running Docker Swarm services into a volume.
 
 ## Background
 
-There are lots of Docker volume backup systems; all of them have one or both of these problems:
+There are lots of Docker volume backup systems; all of them have one or both of these limitations:
  - You need to define all the volumes to back up in the configuration system
  - Backups require services to be stopped to take consistent copies
 
-Backupbot II tries to solve these problems by **letting you define how to back up your services using Docker labels**, so you can **easily collect your backups for use with another system** like docker-volume-backup.
+Backupbot II tries to help, by
+1. **letting you define backups using Docker labels**, so you can **easily collect your backups for use with another system** like docker-volume-backup.
+2. **running pre- and post-commands** before and after backups, for example to use database tools to take a backup from a running service.
 
 ## Deployment
 

compose.ssh.yml

@@ -9,7 +9,6 @@ services:
     secrets:
       - source: ssh_key
         mode: 0400
-    entrypoint: [ "/usr/bin/backup.sh" ]
 
 secrets:
   ssh_key:

compose.swarmm-cronjob.yml

@@ -12,3 +12,4 @@ services:
         # Note(3wc): blank label to be picked up by `abra recipe sync`
       restart_policy:
         condition: none
+    entrypoint: [ "/usr/bin/backup.sh" ]

setup-cron.sh

@@ -5,7 +5,6 @@ set -o pipefail
 
 cron_schedule="${CRON_SCHEDULE:?CRON_SCHEDULE not set}"
 
-echo "$cron_schedule /usr/bin/backup.sh" | crontab -
-crontab -l
+echo "$cron_schedule /usr/bin/backup.sh" > /etc/crontabs/root
 
-crond -f -L /dev/stdout
+crond -f -d8 -L /dev/stdout