repeatedly tries to free files count on btrfs
When storage is btrfs, the app tries to free up files count all the time. Probably because there is no inode limit in btrfs.
df -i output:
root@gitlabrunner2:~# df -i /var/lib/docker/
Filesystem Inodes IUsed IFree IUse% Mounted on
/dev/sda 0 0 0 - /var/lib/docker
log output:
{"log":"time=\"2016-11-02T21:02:23Z\" level=warning msg=\"Freeing files count. The free file count is below the lower bound: 0 trying to free up to: 2097152\" \n","stream":"stderr","time":"2016-11-02T21:02:23.062893325Z"}
{"log":"time=\"2016-11-02T21:02:23Z\" level=warning msg=\"Failed to free disk space: no images or caches to delete\" \n","stream":"stderr","time":"2016-11-02T21:02:23.070522616Z"}
{"log":"time=\"2016-11-02T21:02:23Z\" level=info msg=\"Freed bytes: 0 B files: 0\" \n","stream":"stderr","time":"2016-11-02T21:02:23.073832234Z"}
{"log":"time=\"2016-11-02T21:02:53Z\" level=warning msg=\"Freeing files count. The free file count is below the lower bound: 0 trying to free up to: 2097152\" \n","stream":"stderr","time":"2016-11-02T21:02:53.108081726Z"}
{"log":"time=\"2016-11-02T21:02:53Z\" level=warning msg=\"Failed to free disk space: no images or caches to delete\" \n","stream":"stderr","time":"2016-11-02T21:02:53.120921792Z"}
{"log":"time=\"2016-11-02T21:02:53Z\" level=info msg=\"Freed bytes: 0 B files: 0\" \n","stream":"stderr","time":"2016-11-02T21:02:53.12106865Z"}
{"log":"time=\"2016-11-02T21:03:23Z\" level=warning msg=\"Freeing files count. The free file count is below the lower bound: 0 trying to free up to: 2097152\" \n","stream":"stderr","time":"2016-11-02T21:03:23.152567928Z"}
{"log":"time=\"2016-11-02T21:03:23Z\" level=warning msg=\"Failed to free disk space: no images or caches to delete\" \n","stream":"stderr","time":"2016-11-02T21:03:23.163780781Z"}
{"log":"time=\"2016-11-02T21:03:23Z\" level=info msg=\"Freed bytes: 0 B files: 0\" \n","stream":"stderr","time":"2016-11-02T21:03:23.163803509Z"}