update backupbot labels

.env.sample

@@ -1,6 +1,7 @@
 TYPE=rallly
 TIMEOUT=300
 ENABLE_AUTO_UPDATE=true
+ENABLE_BACKUPS=true
 
 DOMAIN=rallly.example.com
 

abra.sh

@@ -1 +1,2 @@
 export APP_ENTRYPOINT_VERSION=v3
+export PG_BACKUP_VERSION=v1

compose.yml

@@ -56,9 +56,10 @@ services:
     image: postgres:14.8
     deploy:
       labels:
-          backupbot.backup: "true"
+        backupbot.backup: "${ENABLE_BACKUPS:-true}"
-          backupbot.backup.pre-hook: "PGPASSWORD=$$(cat /run/secrets/db_password) pg_dump -U postgres $${POSTGRES_DB} > /var/lib/postgresql/data/backup.sql"
+        backupbot.backup.pre-hook: "/pg_backup.sh backup"
-          backupbot.backup.post-hook: "rm -rf /var/lib/postgresql/data/backup.sql"
+        backupbot.backup.volumes.db-data.path: "backup.sql"
+        backupbot.restore.post-hook: '/pg_backup.sh restore'
     volumes:
       - db-data:/var/lib/postgresql/data
     secrets:
@@ -66,6 +67,7 @@ services:
     environment:
       - POSTGRES_PASSWORD_FILE=/run/secrets/db_password
       - POSTGRES_DB=db
+      - POSTGRES_USER=postgres
     healthcheck:
       test: ["CMD-SHELL", "pg_isready -U postgres"]
       interval: 5s
@@ -73,6 +75,10 @@ services:
       retries: 5
     networks:
       - internal
+    configs:
+        - source: pg_backup
+          target: /pg_backup.sh
+          mode: 0555
 
 secrets:
   db_password:
@@ -91,9 +97,6 @@ networks:
   internal:
 
 volumes:
-  mongodb_log:
-  mongodb_lib:
-  mongodb:
   db-data:
 
 configs:
@@ -101,3 +104,6 @@ configs:
     name: ${STACK_NAME}_app_entrypoint_${APP_ENTRYPOINT_VERSION}
     file: entrypoint.sh.tmpl
     template_driver: golang
+  pg_backup:
+    name: ${STACK_NAME}_pg_backup_${PG_BACKUP_VERSION}
+    file: pg_backup.sh

pg_backup.sh

@@ -0,0 +1,34 @@
+#!/bin/bash
+
+set -e
+
+BACKUP_FILE='/var/lib/postgresql/data/backup.sql'
+
+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 $BACKUP_FILE
+
+    trap - EXIT INT TERM
+    restore_config
+}
+
+$@