Space leak in /var/log

I have found that space leaks in /var/log
It is caused by nginx

# df -hl /var/log
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/os-varlog 332G 319G 0 100% /var/log

# lsof -c nginx | grep deleted
nginx 18644 root 6w REG 253,2 1431908352 21758179 /var/log/nginx/access_nailgun.log-20160825 (deleted)
nginx 18644 root 7w REG 253,2 315231125504 21762537 /var/log/nginx/error_nailgun.log-20160825 (deleted)
nginx 18644 root 8w REG 253,2 77824 21758464 /var/log/nginx/access_repo.log-20160825 (deleted)
nginx 18644 root 9w REG 253,2 115408896 21762538 /var/log/nginx/error_repo.log-20160825 (deleted)
nginx 18645 dockerroot 6w REG 253,2 1431908352 21758179 /var/log/nginx/access_nailgun.log-20160825 (deleted)
nginx 18645 dockerroot 7w REG 253,2 315231125504 21762537 /var/log/nginx/error_nailgun.log-20160825 (deleted)
nginx 18645 dockerroot 8w REG 253,2 77824 21758464 /var/log/nginx/access_repo.log-20160825 (deleted)
nginx 18645 dockerroot 9w REG 253,2 115408896 21762538 /var/log/nginx/error_repo.log-20160825 (deleted)
nginx 18646 dockerroot 6w REG 253,2 1431908352 21758179 /var/log/nginx/access_nailgun.log-20160825 (deleted)
nginx 18646 dockerroot 7w REG 253,2 315231125504 21762537 /var/log/nginx/error_nailgun.log-20160825 (deleted)
nginx 18646 dockerroot 8w REG 253,2 77824 21758464 /var/log/nginx/access_repo.log-20160825 (deleted)
nginx 18646 dockerroot 9w REG 253,2 115408896 21762538 /var/log/nginx/error_repo.log-20160825 (deleted)
nginx 18647 dockerroot 6w REG 253,2 1431908352 21758179 /var/log/nginx/access_nailgun.log-20160825 (deleted)
nginx 18647 dockerroot 7w REG 253,2 315231125504 21762537 /var/log/nginx/error_nailgun.log-20160825 (deleted)
nginx 18647 dockerroot 8w REG 253,2 77824 21758464 /var/log/nginx/access_repo.log-20160825 (deleted)
nginx 18647 dockerroot 9w REG 253,2 115408896 21762538 /var/log/nginx/error_repo.log-20160825 (deleted)
nginx 18648 dockerroot 6w REG 253,2 1431908352 21758179 /var/log/nginx/access_nailgun.log-20160825 (deleted)
nginx 18648 dockerroot 7w REG 253,2 315231125504 21762537 /var/log/nginx/error_nailgun.log-20160825 (deleted)
nginx 18648 dockerroot 8w REG 253,2 77824 21758464 /var/log/nginx/access_repo.log-20160825 (deleted)
nginx 18648 dockerroot 9w REG 253,2 115408896 21762538 /var/log/nginx/error_repo.log-20160825 (deleted)

# dockerctl stop nginx; sleep 120; dockerctl start nginx

# df -hl /var/log
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/os-varlog 332G 24G 292G 8% /var/log

Description of the environment:
Fuel8
VERSION:
  feature_groups:
    - mirantis
  production: "docker"
  release: "8.0"
  api: "1.0"
  build_number: "570"
  build_id: "570"
  fuel-nailgun_sha: "558ca91a854cf29e395940c232911ffb851899c1"
  python-fuelclient_sha: "4f234669cfe88a9406f4e438b1e1f74f1ef484a5"
  fuel-agent_sha: "658be72c4b42d3e1436b86ac4567ab914bfb451b"
  fuel-nailgun-agent_sha: "b2bb466fd5bd92da614cdbd819d6999c510ebfb1"
  astute_sha: "b81577a5b7857c4be8748492bae1dec2fa89b446"
  fuel-library_sha: "c2a335b5b725f1b994f78d4c78723d29fa44685a"
  fuel-ostf_sha: "3bc76a63a9e7d195ff34eadc29552f4235fa6c52"
  fuel-mirror_sha: "fb45b80d7bee5899d931f926e5c9512e2b442749"
  fuelmenu_sha: "78ffc73065a9674b707c081d128cb7eea611474f"
  shotgun_sha: "63645dea384a37dde5c01d4f8905566978e5d906"
  network-checker_sha: "a43cf96cd9532f10794dce736350bf5bed350e9d"
  fuel-upgrade_sha: "616a7490ec7199f69759e97e42f9b97dfc87e85b"
  fuelmain_sha: "d605bcbabf315382d56d0ce8143458be67c53434"

# rpm -qa fuel-docker-*
fuel-docker-images-8.0.0-11.x86_64