doc-exports/docs/cce/umn/cce_faq_00190.html

How Do I Add a Second Data Disk to a Node in a CCE Cluster?

You can use the pre-installation script feature to configure CCE cluster nodes (ECSs).

Before using this feature, write a script that can format data disks and save it to your OBS bucket. Then, inject a command line that will automatically execute the disk formatting script when the node is up. The script specifies the size of each docker data disk (for example, the default docker disk is 100 GB and the additional disk is 110 GB) and the mount path (/data/code) of the additional disk. In this example, the script is named formatdisk.sh. Note that the script must be run by the root user.

Example command line:

cd /tmp;curl -k -X GET OBS bucket address /formatdisk.sh -1 -O;fdisk -l;sleep 30;bash -x formatdisk.sh 100 /data/code;fdisk -l

Example script (formatdisk.sh):

dockerdisksize=$1
mountdir=$2
systemdisksize=40
i=0
while [ 20 -gt $i ]; do 
    echo $i; 
    if [ $(lsblk -o KNAME,TYPE | grep disk | grep -v nvme | awk '{print $1}' | awk '{ print "/dev/"$1}' |wc -l) -ge 3 ]; then 
        break 
    else 
        sleep 5 
    fi; 
    i=$[i+1] 
done 
all_devices=$(lsblk -o KNAME,TYPE | grep disk | grep -v nvme | awk '{print $1}' | awk '{ print "/dev/"$1}')
for device in ${all_devices[@]}; do
    isRawDisk=$(lsblk -n $device 2>/dev/null | grep disk | wc -l)
    if [[ ${isRawDisk} > 0 ]]; then
        # is it partitioned ?
        match=$(lsblk -n $device 2>/dev/null | grep -v disk | wc -l)
        if [[ ${match} > 0 ]]; then
            # already partited
            [[ -n "${DOCKER_BLOCK_DEVICES}" ]] && echo "Raw disk ${device} has been partition, will skip this device"
            continue
        fi
    else
        isPart=$(lsblk -n $device 2>/dev/null | grep part | wc -l)
        if [[ ${isPart} -ne 1 ]]; then
            # not parted
            [[ -n "${DOCKER_BLOCK_DEVICES}" ]] && echo "Disk ${device} has not been partition, will skip this device"
            continue
        fi
        # is used ?
        match=$(lsblk -n $device 2>/dev/null | grep -v part | wc -l)
        if [[ ${match} > 0 ]]; then
            # already used
            [[ -n "${DOCKER_BLOCK_DEVICES}" ]] && echo "Disk ${device} has been used, will skip this device"
            continue
        fi
        isMount=$(lsblk -n -o MOUNTPOINT $device 2>/dev/null)
        if [[ -n ${isMount} ]]; then
            # already used
            [[ -n "${DOCKER_BLOCK_DEVICES}" ]] && echo "Disk ${device} has been used, will skip this device"
            continue
        fi
        isLvm=$(sfdisk -lqL 2>>/dev/null | grep $device | grep "8e.*Linux LVM")
        if [[ ! -n ${isLvm} ]]; then
            # part system type is not Linux LVM
            [[ -n "${DOCKER_BLOCK_DEVICES}" ]] && echo "Disk ${device} system type is not Linux LVM, will skip this device"
            continue
        fi
    fi
    block_devices_size=$(lsblk -n -o SIZE $device 2>/dev/null | awk '{ print $1}')
    if [[ ${block_devices_size}"x" != "${dockerdisksize}Gx" ]] && [[ ${block_devices_size}"x" != "${systemdisksize}Gx" ]]; then
echo "n
p
1


w
" | fdisk $device
        mkfs -t ext4 ${device}1
        mkdir -p $mountdir
        echo "${device}1  $mountdir ext4  noatime  0 0" | tee -a /etc/fstab >/dev/null
        mount $mountdir
    fi
done

Parent topic: Reference