feat: add backup and restore support

.env.sample

@@ -203,3 +203,6 @@ DEFAULT_LOCALE=en
 # OMNIAUTH_ONLY=true
 # ONE_CLICK_SSO_LOGIN=true
 # SECRET_OIDC_CLIENT_SECRET_VERSION=v1
+
+# Backup Bot Two
+ENABLE_BACKUPS=true

abra.sh

@@ -150,3 +150,5 @@ secrets_activerecord() {
 
   rm -rf /tmp/activerecord.txt
 }
+
+export PG_BACKUP_VERSION=v1

compose.yml

@@ -21,6 +21,8 @@ services:
         - "traefik.http.routers.${STACK_NAME}_web.entrypoints=web-secure"
         - "traefik.http.routers.${STACK_NAME}_web.tls.certresolver=${LETS_ENCRYPT_ENV}"
         - "coop-cloud.${STACK_NAME}.version=3.0.9+v4.5.20"
+        - "backupbot.backup=${ENABLE_BACKUPS:-true}"
+        - "backupbot.backup.volumes.redis=false"
     configs: &configs
       - source: entrypoint_sh
         target: /usr/local/bin/entrypoint.sh
@@ -169,6 +171,15 @@ services:
       - internal
     volumes:
       - postgres:/var/lib/postgresql
+    configs:
+      - source: pg_backup
+        target: /pg_backup.sh
+        mode: 0555
+    deploy:
+      labels:
+        - "backupbot.backup.pre-hook=/pg_backup.sh backup"
+        - "backupbot.backup.volumes.postgres.path=backup.sql"
+        - "backupbot.restore.post-hook=/pg_backup.sh restore"
 
     secrets:
       - db_password
@@ -222,6 +233,9 @@ networks:
     external: true
 
 configs:
+  pg_backup:
+    name: ${STACK_NAME}_pg_backup_${PG_BACKUP_VERSION}
+    file: pg_backup.sh
   entrypoint_sh:
     name: ${STACK_NAME}_entrypoint_conf_${ENTRYPOINT_CONF_VERSION}
     file: entrypoint.sh.tmpl

pg_backup.sh

@@ -0,0 +1,90 @@
+#!/bin/bash
+
+set -Eeuo pipefail
+
+BACKUP_FILE="/var/lib/postgresql/backup.sql"
+TMP_BACKUP_FILE="${BACKUP_FILE}.tmp"
+
+export PGPASSWORD="$(cat "$POSTGRES_PASSWORD_FILE")"
+
+backup() {
+    rm -f "$TMP_BACKUP_FILE"
+
+    pg_dump \
+        -U "$POSTGRES_USER" \
+        "$POSTGRES_DB" \
+        > "$TMP_BACKUP_FILE"
+
+    mv "$TMP_BACKUP_FILE" "$BACKUP_FILE"
+    chmod 600 "$BACKUP_FILE"
+}
+
+restore() {
+    [ -s "$BACKUP_FILE" ] || exit 1
+
+    HBA_FILE="$(
+        psql \
+            -U "$POSTGRES_USER" \
+            -d postgres \
+            -Atc "SHOW hba_file;"
+    )"
+
+    HBA_BACKUP="$(mktemp /tmp/pg_hba.backupbot.XXXXXX)"
+
+    restore_hba() {
+        if [ -f "$HBA_BACKUP" ]; then
+            cat "$HBA_BACKUP" > "$HBA_FILE"
+
+            psql \
+                -U "$POSTGRES_USER" \
+                -d postgres \
+                -c "SELECT pg_reload_conf();" \
+                >/dev/null
+
+            rm -f "$HBA_BACKUP"
+        fi
+    }
+
+    cp "$HBA_FILE" "$HBA_BACKUP"
+
+    trap restore_hba EXIT INT TERM
+
+    printf 'local all all trust\n' > "$HBA_FILE"
+
+    psql \
+        -U "$POSTGRES_USER" \
+        -d postgres \
+        -c "SELECT pg_reload_conf();" \
+        >/dev/null
+
+    dropdb \
+        --force \
+        -U "$POSTGRES_USER" \
+        "$POSTGRES_DB"
+
+    createdb \
+        -U "$POSTGRES_USER" \
+        "$POSTGRES_DB"
+
+    psql \
+        -v ON_ERROR_STOP=1 \
+        -U "$POSTGRES_USER" \
+        -d "$POSTGRES_DB" \
+        -1 \
+        -f "$BACKUP_FILE"
+
+    trap - EXIT INT TERM
+    restore_hba
+}
+
+case "${1:-}" in
+    backup)
+        backup
+        ;;
+    restore)
+        restore
+        ;;
+    *)
+        exit 1
+        ;;
+esac