For Linux distributions that use systemd (Ubuntu, Debian, Arch Linux) you can create a daemon in the following way.

First, create postgrest configuration in /etc/postgrest/config

db-uri = "postgres://<your_user>:<your_password>@localhost:5432/<your_db>"
db-schemas = "<your_exposed_schema>"
db-anon-role = "<your_anon_role>"
jwt-secret = "<your_secret>"

Create a dedicated postgrest user with:

sudo useradd -M -U -d /nonexistent -s /usr/sbin/nologin postgrest

Then create the systemd service file in /etc/systemd/system/postgrest.service

Description=REST API for any PostgreSQL database

ExecStart=/bin/postgrest /etc/postgrest/config
ExecReload=/bin/kill -SIGUSR1 $MAINPID


After that, you can enable the service at boot time and start it with:

systemctl enable postgrest
systemctl start postgrest

## For reloading the service
## systemctl restart postgrest

File Descriptors

File descriptors are kernel resources that are used by HTTP connections (among others). File descriptors are limited per process. The kernel default limit is 1024, which is increased in some Linux distributions. When under heavy traffic, PostgREST can reach this limit and start showing No file descriptors available errors. To clear these errors, you can increase the process’ file descriptor limit.