Experimental backupbot support

abra.sh

@@ -1,3 +1,4 @@
 export CERTDUMPER_POST_VERSION=v1
 export POSTFIX_OVERRIDE_VERSION=v17
 export SENDER_LOGIN_VERSIONS=v2
+export PG_BACKUP_VERSION=v1

compose.yml

@@ -96,12 +96,22 @@ services:
         - "traefik.http.routers.${STACK_NAME}.rule=Host(`${DOMAIN}`)"
         - "traefik.http.routers.${STACK_NAME}.tls.certresolver=${LETS_ENCRYPT_ENV}"
         - "traefik.http.routers.${STACK_NAME}.entrypoints=web-secure"
+        - "backupbot.backup=true"
         - "coop-cloud.${STACK_NAME}.version=3.2.1+2024.06.66"
   
   db:
     image: redis:8.10.2-alpine
     volumes:
       - "redis:/data"
+    deploy:
+      labels:
+        backupbot.backup.pre-hook: "/pg_backup.sh backup"
+        backupbot.backup.volumes.postgres.path: "backup.sql"
+        backupbot.backup.post-hook: "/pg_backup.sh restore"
+    configs:
+      - source: pg_backup
+        target: /pg_backup.sh
+        mode: 0555
 
   admin:
     image: ghcr.io/mailu/admin:2024.06.66
@@ -115,6 +125,9 @@ services:
       - "mailu:/data"
     networks:
       - default
+    deploy:
+      labels:
+        - "backupbot.backup=true"
 
   imap:
     image: ghcr.io/mailu/dovecot:2024.06.66
@@ -221,6 +234,9 @@ configs:
   certdumper_post:
     name: ${STACK_NAME}_certdumper_post_${CERTDUMPER_POST_VERSION}
     file: certdumper_post.sh
+  pg_backup:
+    name: ${STACK_NAME}_pg_backup_${PG_BACKUP_VERSION}
+    file: pg_backup.sh
 
 secrets:
   secret_key:

pg_backup.sh

@@ -0,0 +1,36 @@
+#!/bin/bash
+
+set -e
+
+BACKUP_FILE='/var/lib/postgresql/data/backup.sql'
+
+# TODO: this recipe doesn't have a db_password secret.
+function backup {
+  export PGPASSWORD=$(cat /run/secrets/db_password)
+  pg_dump -U ${POSTGRES_USER} ${POSTGRES_DB} > $BACKUP_FILE
+}
+
+function restore {
+    cd /var/lib/postgresql/data/
+    restore_config(){
+        # Restore allowed connections
+        cat pg_hba.conf.bak > pg_hba.conf
+        su postgres -c 'pg_ctl reload'
+    }
+    # Don't allow any other connections than local
+    cp pg_hba.conf pg_hba.conf.bak
+    echo "local all all trust" > pg_hba.conf
+    su postgres -c 'pg_ctl reload'
+    trap restore_config EXIT INT TERM
+
+    # Recreate Database
+    psql -U ${POSTGRES_USER} -d postgres -c "DROP DATABASE ${POSTGRES_DB} WITH (FORCE);"
+    createdb -U ${POSTGRES_USER} ${POSTGRES_DB}
+    psql -U ${POSTGRES_USER} -d ${POSTGRES_DB} -1 -f $BACKUP_FILE
+
+    trap - EXIT INT TERM
+    restore_config
+}
+
+$@
+