Variables, Dockerfile, better syntax, etc.

README.md

@@ -2,6 +2,13 @@
 
 Automatically backup files from running Docker Swarm services based on labels.
 
+## Background
+
+There are lots of Docker volume backup systems; all of them have one or both of
+these problems:
+ - You need to define all the volumes to back up in the configuration system
+ - Backups require services to be stopped to take consistent copies
+
 ## TODO
 
 - [ ] Make a Docker image of this
@@ -13,8 +20,9 @@ Automatically backup files from running Docker Swarm services based on labels.
 
 (Haven't done secrets yet, here are two options)
 
-v1:
 ```
+services:
+  db:
     deploy:
       labels:
         backupbot.backup: "true"
@@ -24,17 +32,6 @@ v1:
         backupbot.backup.post-hook: "rm -rf /tmp/dump/dump.db"
         backupbot.backup.path: "/tmp/dump/"
 ```
-v2:
-```
-    deploy:
-      labels:
-        backupbot.backup: "true"
-        backupbot.backup.repos: "$some_thing"
-        backupbot.backup.at: "* * * * *"
-        backupbot.backup.post-hook: "rm -rf /tmp/dump/dump.db"
-        backupbot.backup.secrets": "db_root_password",
-        backupbot.backup.pre-hook: 'mysqldump -u root -p"$DB_ROOT_PASSWORD" -f /tmp/dump/dump.db'
-```
 
 ## Questions: