如何挂载AWS I3实例存储设备并从Docker中的C＃应用​​程序使用

Question

I want to use I3 fast drives from C# app that runs in Docker via ECS. But I do not see dev/nvme0n1 in the list of drives via System.IO.DriveInfo.GetDrives().Select(d => d.ToString()); :

"/",
"/proc",
"/dev",
"/dev/pts",
"/sys",
"/sys/fs/cgroup",
"/sys/fs/cgroup/blkio",
"/sys/fs/cgroup/cpu",
"/sys/fs/cgroup/cpuacct",
"/sys/fs/cgroup/cpuset",
"/sys/fs/cgroup/devices", -- maybe here?
"/sys/fs/cgroup/freezer",
"/sys/fs/cgroup/hugetlb",
"/sys/fs/cgroup/memory",
"/sys/fs/cgroup/perf_event",
"/dev/mqueue",
"/etc/resolv.conf",
"/etc/hostname",
"/etc/hosts",
"/dev/shm",
"/proc/bus",
"/proc/fs",
"/proc/irq",
"/proc/sys",
"/proc/sysrq-trigger",
"/proc/kcore",
"/proc/latency_stats",
"/proc/timer_list",
"/proc/sched_debug",
"/proc/scsi",
"/sys/firmware"

I have read that the devices are not formatted and not mounted at the start. How to format and mount them only once when the instance starts and not when I publish new docker images? Or do so from code but check if already mounted and keep existing data?

Answer 1

Found a solution to store Docker volumes on instance storage.

from this gist commands to replace /var/lib/docker/volumes with a link to dev/nvme0n1 :

#!/bin/sh -e
service docker stop || true
DEV="dev/nvme0n1"
umount $DEV 2>/dev/null || true
mkdir /mnt/docker-volumes 2>/dev/null || rm -rf /mnt/docker-volumes/*
mkfs.ext4 $DEV
rm -rf /var/lib/docker/vfs
rm -rf /var/lib/docker/volumes
mount -t ext4 -o noatime,data=writeback,nobh,barrier=0,commit=300 $DEV /mnt/docker-volumes
mkdir /mnt/docker-volumes/vfs
ln -s /mnt/docker-volumes/vfs /var/lib/docker/vfs
mkdir /mnt/docker-volumes/volumes
ln -s /mnt/docker-volumes/volumes /var/lib/docker/volumes

service docker start

Then a command VOLUME my-vol in Dockerfile creates/uses a volume in /mnt/docker-volumes/volumes directory on the host.

This commands must be run on host machine via SSH once, but then AWS ECS just works and I could publish new apps from Visual Studio with a couple of clicks. Haven't found a way to pass user data from ECS Create Cluster wizard, looks like it is not supported now.