HTTP/1.1 400 Bad Request
Content-Type: text/plain; charset=utf-8
Connection: close

400 Bad Request
Prometheus Node Exporter:
  node_exporter_build_info:
    branch: HEAD
    goversion: go1.17.3
    revision: a2321e7b940ddcff26873612bccdf7cd4c42b6b6
    version: 1.3.1
  node_os_info:
    id: ...