Format and Mount Disk on GCP Instance

chefbc
It's me... It's me... It's me ChefBC!
More posts by chefbc.

chefbc

29 Apr 2020•2 min read

This is intended as a quick reference and explanation of how to format and mount an gcp-persistent-disk to your compute engine VM instance.

Requirements

Running VM instance in GCP
Service Account to interact with GCP disk.

Create and attach new GCP Disk to compute instance

Available Disk Types: pd-ssd or pd-standard

INSTANCE_NAME="`hostname`"
DEVICE_NAME="new-disk"
ZONE_NAME="us-central1-b"
NEW_DISK_NAME="${INSTANCE_NAME}-${DEVICE_NAME}"
BKUP_SIZE_GB=15
DISK_TYPE="pd-ssd"

gcloud compute disks create "${NEW_DISK_NAME}" --size "${BKUP_SIZE_GB}" --zone "${ZONE_NAME}" --type "${DISK_TYPE}"
gcloud compute instances attach-disk "${INSTANCE_NAME}" --disk="${NEW_DISK_NAME}" --mode=rw --zone="${ZONE_NAME}" --device-name="${DEVICE_NAME}"
gcloud compute instances describe ${INSTANCE_NAME} --zone "${ZONE_NAME}" --format='yaml(name,disks)'

Create and mount filesystem

ext4

DEVICE_ID=`ls -lart /dev/disk/by-id/google-${DEVICE_NAME}| sed 's|.*/||'`
sudo mkfs.ext4 -m 0 -F -E lazy_itable_init=0,lazy_journal_init=0,discard /dev/${DEVICE_ID}
MNT_DIR="/mysql/bkupdisk"
mkdir -p ${MNT_DIR}
sudo mount -o nofail,noatime,nodev,defaults /dev/${DEVICE_ID} ${MNT_DIR}

xfs

DEVICE_ID=`ls -lart  /dev/disk/by-id/google-${DEVICE_NAME}| sed 's|.*/||'`
mkfs.xfs /dev/${DEVICE_ID}
MNT_DIR="/mysql/bkupdisk"
mkdir -p ${MNT_DIR}
sudo mount -o nofail,noatime,nodev,defaults /dev/${DEVICE_ID} ${MNT_DIR}

Add disk to fstab to persist via reboot

ext4

echo UUID=`sudo blkid -s UUID -o value /dev/${DEVICE_ID}` ${MNT_DIR} ext4 discard,defaults,nofail 0 2 | sudo tee -a /etc/fstab
mount -a

xfs

echo UUID=`sudo blkid -s UUID -o value /dev/${DEVICE_ID}` ${MNT_DIR} xfs nofail,noatime,defaults,nodev 0 2 | tee -a /etc/fstab
mount -a

Resize GCP disk

NEW_SIZE_GB=25
gcloud compute disks resize "${NEW_DISK_NAME}" --size "${NEW_SIZE_GB}" --zone "${ZONE_NAME}" --quiet
gcloud compute disks describe "${NEW_DISK_NAME}" --zone "${ZONE_NAME}"

Extend filesystem on instance

ext4

resize2fs /dev/${DEVICE_ID}

xfs

xfs_growfs ${MNT_DIR} -D size

Unmount and detach GCP disk

umount ${MNT_DIR}
gcloud compute instances detach-disk "${INSTANCE_NAME}" --disk="${NEW_DISK_NAME}" --zone="${ZONE_NAME}"
gcloud compute instances describe ${INSTANCE_NAME} --zone "${ZONE_NAME}" --format='yaml(name,disks)'

Destroy GCP disk

gcloud compute disks delete "${NEW_DISK_NAME}" --zone="${ZONE_NAME}"