Promtail Restore Log Data Into Loki

server:
  http_listen_port: 9080
  grpc_listen_port: 0
clients:
  - url: http://loki:3100/loki/api/v1/push
    batchsize: 512000
    batchwait: 1s
positions:
  filename: /tmp/positions.yaml
scrape_configs:
  - job_name: system
    static_configs:
      - targets:
          - localhost
        labels:
          job: varlogs
          __path__: /var/backups/**/*.log
    pipeline_stages:
      - json:
          expressions:
            log: log
            stream: stream
            time: time
      - regex:
          source: filename
          expression: '.*/(?P<app_name>[^_]+)_.+\.log$'
      - labels:
          stream: stream
          app: app_name
      - timestamp:
          source: time
          format: RFC3339Nano
      - output:
          format: json
          source: log