Uly.me

cloud engineer

mount

GCP CVS Mount Instructions

Here are the mount instructions for NFS and SMB drives for GCP Netapp CVS.

NFS

sudo yum install -y nfs-utils
sudo apt-get install nfs-common
sudo mkdir /condescending-sharp-hugle
sudo mount -t nfs -o rw,hard,rsize=65536,wsize=65536,vers=3,tcp 10.49.253.6:/condescending-sharp-hugle /condescending-sharp-hugle

SMB

Mapping your network drive
1. Click the Start button and then click on Computer.
2. Click Map Network Drive.
3. In the Drive list, click any available drive letter.
4. In the folder box, type \\shared.mydomain.com\myshare.
To connect every time you log on to your computer, select the Reconnect at sign-in check box.
\\shared.mydomain.com\myshare
5. Click Finish.

GCS Fuse

GCS Fuse allows you to mount a Google bucket as a file system. It’s similar to S3FS.

Setup repo

sudo tee /etc/yum.repos.d/gcsfuse.repo > /dev/null <<EOF
[gcsfuse]
name=gcsfuse (packages.cloud.google.com)
baseurl=https://packages.cloud.google.com/yum/repos/gcsfuse-el7-x86_64
enabled=1
gpgcheck=1
repo_gpgcheck=0
gpgkey=https://packages.cloud.google.com/yum/doc/yum-key.gpg
       https://packages.cloud.google.com/yum/doc/rpm-package-key.gpg
EOF

Yum install

sudo yum install gcsfuse

Login to GCP and mount. Run as a user and not root.

gcloud auth login
gcsfuse my-bucket /path/to/mount

Unmount

fusermount -u /path/to/mount

S3FS

s3fs allows Linux to mount S3 buckets as a file system.

Install s3fs.

sudo apt install s3fs

Setup credentials.

echo ACCESS_KEY_ID:SECRET_ACCESS_KEY > /etc/.passwd-s3fs
chmod 600 ${HOME}/.passwd-s3fs

Mount it.

s3fs bucketname /mountpoint -o passwd_file=/etc/.passwd-s3fs

Mount it automatically.

bucketname /mountpoint fuse.s3fs _netdev,allow_other,passwd_file=/etc/.passwd-s3fs,rw,uid=1000,gid=1000 0 0

Alternative.

s3fs#bucketname /mountpoint fuse _netdev,allow_other,use_cache=/root/cache,uid=1000,gid=1000,umask=022 0 0

Mounting Duplicate UUIDs

While trying to recover a directory from backup, I ran into an issue with duplicate uuids when trying to mount a recovered volume. The problem was the recovered volume had the same uuid as boot.

Here’s the original mount command I ran, but I was getting a wrong fs type error.

mkdir
mount -t xfs /dev/nvme3n1p2 /recover
mount: wrong fs type, bad option, bad superblock on /dev/nvme3n1p2,
       missing codepage or helper program, or other error

It turned out to be a duplicated uuid. To get around this problem, I ran -o nouuid.

mount -t xfs -o nouuid /dev/nvme3n1p2 /recover

Once the files were recovered, I unmounted volume and detached it from the instance.

Linux Format USB Drive

Here’s how to format a USB drive on Linux.

Plug in the USB drive to see mount point.

# scan for all drives
df -Th
Filesystem     Type     Size  Used Avail Use% Mounted on
/dev/sdc1      fuseblk   30G   66M   30G   1% /media/ulysses/451B99AF225B48EC

Unmount USB drive.

umount /dev/sdc1

Choose a file system type and run the appropriate format command.

# nfts format
mkfs.ntfs /dev/sdc1
# vfat format
mkfs.vfat /dev/sdc1
# ext4 format
mkfs.ext4 /dev/sdc1

AWS XFS Volume Setup

Here’s how to setup a XFS volume.

file -s /dev/nvme2n1
mkfs -t xfs /dev/nvme2n1

Mount to /data.

mkdir /data
mount /dev/nvme2n1 /data

Add to /etc/fstab.

vim /etc/fstab
#
#
UUID=xxxxxxxxxxxxxxxxxxxxxx /data  xfs  defaults 0 0

AWS EFS /etc/fstab

To automatically mount a EFS volume after each reboot, you’ll need to add the following format to /etc/fstab.

You can use the DNS name given by AWS.

fs-12345678:/ /mnt/efs efs defaults,_netdev 0 0

Or the IP address.

10.0.0.22:/ /mnt/efs efs defaults,_netdev 0 0

Mount all with fake and verbose.

mount -fav

AWS EFS Describe Mount Targets

Here’s how to display mount targets of an EFS system via AWS CLI.

 aws efs describe-mount-targets \
--file-system-id fs-xxxxxxxx \
--profile default \
--region us-east-1