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On Linux

If you wish to install locally or already have a configured server, see the basic Installation Guide
The following is a recommended way to configure Linux and install HarperDB. These instructions should work reasonably well for any public cloud or on-premises Linux instance.

These instructions assume that the following has already been completed:
  1. 1.
    Linux is installed
  2. 2.
    Basic networking is configured
  3. 3.
    A non-root user account dedicated to HarperDB with sudo privileges exists
  4. 4.
    An additional volume for storing HarperDB files is attached to the Linux instance
  5. 5.
    Traffic to ports 9925 (HarperDB Operations API) 9926 (HarperDB Application Interface) and 9932 (HarperDB Clustering) is permitted
While you will need to access HarperDB through port 9925 for the administration through the operations API, and port 9932 for clustering, for higher level of security, you may want to consider keeping both of these ports restricted to a VPN or VPC, and only have the application interface (9926 by default) exposed to the public Internet.
For this example, we will use an AWS Ubuntu Server 22.04 LTS m5.large EC2 Instance with an additional General Purpose SSD EBS volume and the default “ubuntu” user account.

(Optional) LVM Configuration

Logical Volume Manager (LVM) can be used to stripe multiple disks together to form a single logical volume. If striping disks together is not a requirement, skip these steps.
Find disk that already has a partition
used_disk=$(lsblk -P -I 259 | grep "nvme.n1.*part" | grep -o "nvme.n1")
Create array of free disks
declare -a free_disks
mapfile -t free_disks < <(lsblk -P -I 259 | grep "nvme.n1.*disk" | grep -o "nvme.n1" | grep -v "$used_disk")
Get quantity of free disks
Construct pvcreate command
for i in "${free_disks[@]}"
cmd_string="$cmd_string /dev/$i"
Initialize disks for use by LVM
pvcreate_cmd="pvcreate $cmd_string"
sudo $pvcreate_cmd
Create volume group
vgcreate_cmd="vgcreate hdb_vg $cmd_string"
sudo $vgcreate_cmd
Create logical volume
sudo lvcreate -n hdb_lv -i $free_disks_qty -l 100%FREE hdb_vg

Configure Data Volume

Run lsblk and note the device name of the additional volume
Create an ext4 filesystem on the volume (The below commands assume the device name is nvme1n1. If you used LVM to create logical volume, replace /dev/nvme1n1 with /dev/hdb_vg/hdb_lv)
sudo mkfs.ext4 -L hdb_data /dev/nvme1n1
Mount the file system and set the correct permissions for the directory
mkdir /home/ubuntu/hdb
sudo mount -t ext4 /dev/nvme1n1 /home/ubuntu/hdb
sudo chown -R ubuntu:ubuntu /home/ubuntu/hdb
sudo chmod 775 /home/ubuntu/hdb
Create a fstab entry to mount the filesystem on boot
echo "LABEL=hdb_data /home/ubuntu/hdb ext4 defaults,noatime 0 1" | sudo tee -a /etc/fstab

Configure Linux and Install Prerequisites

If a swap file or partition does not already exist, create and enable a 2GB swap file
sudo dd if=/dev/zero of=/swapfile bs=128M count=16
sudo chmod 600 /swapfile
sudo mkswap /swapfile
sudo swapon /swapfile
echo "/swapfile swap swap defaults 0 0" | sudo tee -a /etc/fstab
Increase the open file limits for the ubuntu user
echo "ubuntu soft nofile 500000" | sudo tee -a /etc/security/limits.conf
echo "ubuntu hard nofile 1000000" | sudo tee -a /etc/security/limits.conf
Install Node Version Manager (nvm)
curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.39.3/install.sh | bash
Load nvm (or logout and then login)
. ~/.nvm/nvm.sh
nvm install <the node version>

Install and Start HarperDB

Here is an example of installing HarperDB with minimal configuration.
npm install -g harperdb
harperdb start \
--TC_AGREEMENT "yes" \
--ROOTPATH "/home/ubuntu/hdb" \
Here is an example of installing HarperDB with commonly used additional configuration.
npm install -g harperdb
harperdb start \
--TC_AGREEMENT "yes" \
--ROOTPATH "/home/ubuntu/hdb" \
--HDB_ADMIN_PASSWORD "password" \
--CLUSTERING_USER "cluster_user" \
HarperDB will automatically start after installation. If you wish HarperDB to start when the OS boots, you have two options
You can set up a crontab:
(crontab -l 2>/dev/null; echo "@reboot PATH=\"/home/ubuntu/.nvm/versions/node/v18.15.0/bin:$PATH\" && harperdb start") | crontab -
Or you can create a systemd script at /etc/systemd/system/harperdb.service
Pasting the following contents into the file:
ExecStart=/bin/bash -c 'PATH="/home/ubuntu/.nvm/versions/node/v18.15.0/bin:$PATH"; harperdb'
And then running the following:
systemctl daemon-reload
systemctl enable harperdb