mountinfo

1 0 8:1 / / rw,noatime shared:1 - ext4 /dev/sda1 rw,errors=remount-ro,data=reordered
2 1 0:1 / /dev rw,relatime shared:2 - devtmpfs udev rw,size=10240k,nr_inodes=16487629,mode=755
3 1 0:2 / /proc rw,nosuid,nodev,noexec,relatime shared:3 - proc proc rw
4 1 0:3 / /sys rw,nosuid,nodev,noexec,relatime shared:4 - sysfs sysfs rw
5 4 0:4 / /sys/fs/cgroup ro,nosuid,nodev,noexec shared:5 - tmpfs tmpfs ro,mode=755
6 5 0:5 / /sys/fs/cgroup/cpuset rw,nosuid,nodev,noexec,relatime shared:6 - cgroup cgroup rw,cpuset
7 5 0:6 /docker /sys/fs/cgroup/cpu,cpuacct rw,nosuid,nodev,noexec,relatime shared:7 - cgroup cgroup rw,cpu,cpuacct
8 5 0:7 /docker /sys/fs/cgroup/memory rw,nosuid,nodev,noexec,relatime shared:8 - cgroup cgroup rw,memory
9 1 0:8 / /var/lib/docker/overlay2/9054a95f2cf7296867089e1bd37931742a17eb3308a795d51adb2654ee2276df/merged/sys/fs/cgroup ro,nosuid,nodev,noexec,relatime - tmpfs tmpfs rw,mode=755
10 9 0:9 /docker /var/lib/docker/overlay2/9054a95f2cf7296867089e1bd37931742a17eb3308a795d51adb2654ee2276df/merged/sys/fs/cgroup/memory ro,nosuid,nodev,noexec,relatime master:17 - cgroup cgroup rw,memory