Getting some errors i just noticed, little help
Feb 25 11:20:11 host4 kernel: audit: type=1400 audit(1488050411.526:10281): apparmor="DENIED" operation="mount" info="failed flags match" error=-13 profile="lxc-container-default-cgns" name="/" pid=6149 comm="(nginx)" flags="rw, rslave"
Feb 25 11:20:11 host4 kernel: audit: type=1400 audit(1488050411.602:10282): apparmor="DENIED" operation="mount" info="failed flags match" error=-13 profile="lxc-container-default-cgns" name="/" pid=6157 comm="(kill)" flags="rw, rslave"
Feb 25 11:20:16 host4 kernel: audit: type=1400 audit(1488050416.654:10283): apparmor="DENIED" operation="mount" info="failed flags match" error=-13 profile="lxc-container-default-cgns" name="/" pid=6179 comm="(nginx)" flags="rw, rslave"
Feb 25 11:20:16 host4 kernel: audit: type=1400 audit(1488050416.770:10284): apparmor="DENIED" operation="mount" info="failed flags match" error=-13 profile="lxc-container-default-cgns" name="/" pid=6187 comm="(kill)" flags="rw, rslave"
Feb 25 11:21:12 host4 kernel: audit: type=1400 audit(1488050472.197:10285): apparmor="DENIED" operation="mount" info="failed flags match" error=-13 profile="lxc-container-default-cgns" name="/" pid=6364 comm="(nginx)" flags="rw, rslave"
Feb 25 11:21:12 host4 kernel: audit: type=1400 audit(1488050472.261:10286): apparmor="DENIED" operation="mount" info="failed flags match" error=-13 profile="lxc-container-default-cgns" name="/" pid=6372 comm="(kill)" flags="rw, rslave"
Feb 25 11:21:17 host4 kernel: audit: type=1400 audit(1488050477.309:10287): apparmor="DENIED" operation="mount" info="failed flags match" error=-13 profile="lxc-container-default-cgns" name="/" pid=6394 comm="(nginx)" flags="rw, rslave"
Feb 25 11:21:17 host4 kernel: audit: type=1400 audit(1488050477.365:10288): apparmor="DENIED" operation="mount" info="failed flags match" error=-13 profile="lxc-container-default-cgns" name="/" pid=6402 comm="(kill)" flags="rw, rslave"