init

scripts/pg-backup.sh

@@ -0,0 +1,80 @@
+#!/bin/sh
+set -eu
+
+BACKUP_DIR="${BACKUP_DIR:-/backups}"
+INTERVAL_SECONDS="${BACKUP_INTERVAL_SECONDS:-86400}"
+RETENTION_DAYS="${BACKUP_RETENTION_DAYS:-7}"
+COMPRESSION_LEVEL="${BACKUP_GZIP_LEVEL:-6}"
+TIMESTAMP_FORMAT="${BACKUP_TIMESTAMP_FORMAT:-%Y-%m-%d_%H-%M-%S}"
+
+mkdir -p "$BACKUP_DIR"
+
+log() {
+  printf '[backup] %s %s\n' "$(date '+%Y-%m-%d %H:%M:%S')" "$*"
+}
+
+backup_db() {
+  host="$1"
+  port="$2"
+  db_name="$3"
+  db_user="$4"
+  db_password="$5"
+  prefix="$6"
+
+  if [ -z "$db_name" ] || [ -z "$db_user" ] || [ -z "$db_password" ]; then
+    log "skip $prefix because DB credentials are incomplete"
+    return 0
+  fi
+
+  timestamp="$(date +"$TIMESTAMP_FORMAT")"
+  file_path="$BACKUP_DIR/${prefix}_${timestamp}.sql.gz"
+
+  log "starting backup for $prefix ($db_name@$host:$port)"
+  PGPASSWORD="$db_password" \
+    pg_dump \
+      --host="$host" \
+      --port="$port" \
+      --username="$db_user" \
+      --dbname="$db_name" \
+      --clean \
+      --if-exists \
+      --no-owner \
+      --no-privileges | gzip "-$COMPRESSION_LEVEL" > "$file_path"
+
+  log "backup created: $file_path"
+}
+
+cleanup_old_backups() {
+  find "$BACKUP_DIR" -type f -name '*.sql.gz' -mtime +"$RETENTION_DAYS" -delete
+  log "old backups cleanup completed (retention ${RETENTION_DAYS} days)"
+}
+
+run_cycle() {
+  backup_db \
+    "${POSTGRES_HOST:-postgres}" \
+    "${POSTGRES_PORT:-5432}" \
+    "${POSTGRES_DB:-}" \
+    "${POSTGRES_USER:-}" \
+    "${POSTGRES_PASSWORD:-}" \
+    "main"
+
+  if [ "${BACKUP_INCLUDE_CHAT_DB:-true}" = "true" ]; then
+    backup_db \
+      "${CHAT_POSTGRES_HOST:-chat-postgres}" \
+      "${CHAT_POSTGRES_PORT:-5432}" \
+      "${CHAT_POSTGRES_DB:-}" \
+      "${CHAT_POSTGRES_USER:-}" \
+      "${CHAT_POSTGRES_PASSWORD:-}" \
+      "chat"
+  fi
+
+  cleanup_old_backups
+}
+
+log "auto-backup service started"
+
+while true; do
+  run_cycle
+  log "sleeping for ${INTERVAL_SECONDS} seconds"
+  sleep "$INTERVAL_SECONDS"
+done