This revision is from 2024/06/17 08:43. You can Restore it.

Two scripts, one is the system service so that the ram disk is re-instated upon reboot, this is obviously the situation of a ram disk and and the ram disk script.

Setup RAM disk service on Linux

# Filename: setup-ramdisk.service
# /etc/systemd/system/setup-ramdisk.service
# sudo cp /home/x/ram_disk/setup-ramdisk.service /etc/systemd/system/setup-ramdisk.service
# sudo systemctl daemon-reload
# sudo systemctl enable setup-ramdisk
# sudo systemctl start setup-ramdisk
# After reboot check with df -h | grep ramdisk
# sudo systemctl status setup-ramdisk

[Unit]
Description=Setup RAM disk and start web server
After=network.target

[Service]
Type=oneshot
ExecStart=/home/x/ram_disk/setup-ramdisk.sh
RemainAfterExit=true

[Install]
WantedBy=multi-user.target
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The second script involves keeping a copy of linux as chrooted jail for a user. Alpine Linux is sufficiently small that its works for this purpose. The second program is named schroot, apt-get install schroot. Putting the ram disk in a chroot jail insures we do not use the disk at all, a lib or two could sneak under the radar causing a bottleneck.

#!/bin/bash

# Setup the ram disk and chroot the environment

# Set variables
RAMDISK_SIZE="1G"
RAM_DISK="/mnt/ramdisk"

# Create the mount point if it doesn't exist
mkdir -p $RAM_DISK

# Mount the RAM disk
mount -t tmpfs -o size=$RAMDISK_SIZE tmpfs $RAM_DISK

# Configure schroot /etc/schroot/schroot.conf
# sudo apt-get install schroot
# [jimbo]
# description=Chroot for jimbo
# directory=/mnt/ramdisk
# users=jimbo
# root-groups=root

sudo cp -R /home/x/ram_disk/os_chroot/* ${RAM_DISK}
sudo chown -R root:root ${RAM_DISK}
sudo chmod -R u=rwx,g=rwx,o= ${RAM_DISK}

sudo mount -o bind /dev ${RAM_DISK}/dev
sudo mount -o bind /proc ${RAM_DISK}/proc
sudo mount -o bind /sys ${RAM_DISK}/sys

mkdir -p ${RAM_DISK}/home/jimbo
chown jimbo:jimbo ${RAM_DISK}/home/jimbo

# log jimbo using command
# sudo schroot -c jimbo --directory=/home/jimbo
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