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---
title: "Deploy bare metal"
description: "Bare metal deployment is tedious, most of this will be automated with a script in the future."
lead: "Bare metal deployment is tedious, most of this will be automated with a script in the future."
date: 2021-07-21 14:49
lastmod: 2021-07-21 14:49
draft: false
images: []
menu:
docs:
2022-08-01 19:16:21 +05:30
parent: "Self-Hosted"
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weight: 532
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toc: true
---
### 2. Configure
mcaptcha is highly configurable.
Configuration is applied/merged in the following order:
1. path to configuration file passed in via `MCAPTCHA_CONFIG`
2. `./config/default.toml`
3. `/etc/mcaptcha/config.toml`
4. environment variables.
### 1. Install postgres if you don't have it already.
For Debian based distributions:
```bash
sudo apt install postgres
```
### 2. Create new user for running `mcaptcha`
```bash
$ sudo useradd -b /srv -m -s /usr/bin/zsh mcaptcha
```
### 3. Create new user in Postgres
```bash
$ sudo -iu postgres # switch to `postgres` user
$ psql
postgres=# CREATE USER mcaptcha WITH PASSWORD 'my super long password and yes you need single quote`;
$ createdb -O mcaptcha mcaptcha # create db 'mcaptcha' with 'mcaptcha' as owner
```
### 4. Install and load [`mCaptcha/cache`](https://github.com/mCaptcha/cache) module:
See [`mCaptcha/cache`](https://github.com/mCaptcha/cache) for more
details.
### 4. Build `mcaptcha`
To build `mcaptcha`, you need the following dependencies:
1. rust
2. node(`v14.16.0`)
3. yarn(JavaScript package manager)
4. make
## How to build
1. Install Cargo using [rustup](https://rustup.rs/) with:
```bash
$ curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh
```
2. Install node(`v14.16.0`)
3. Install yarn(JavaScript package manager)
4. Build with make:
```bash
$ make dev-env && \
make release
```
### 5. Install package:
```bash
$ sudo cp ./target/release/mcaptcha /usr/bin/ && \
mkdir sudo /etc/mcaptcha && \
sudo cp config/default.toml /etc/mcaptcha/config.toml
```
### 6. Systemd service configuration:
1. Copy the following to `/etc/systemd/system/mcaptcha.service`:
```systemd
[Unit]
Description=mCaptcha: a CAPTCHA system that gives attackers a run for their money
[Service]
Type=simple
User=mcaptcha
ExecStart=/usr/bin/mcaptcha
Restart=on-failure
RestartSec=1
SuccessExitStatus=3 4
RestartForceExitStatus=3 4
SystemCallArchitectures=native
MemoryDenyWriteExecute=true
NoNewPrivileges=true
Environment="RUST_LOG=info"
[Unit]
After=sound.target
Wants=network-online.target
Wants=network-online.target
Requires=postgresql.service
After=syslog.target
[Install]
WantedBy=multi-user.target
```
2. Enable service:
```bash
$ sudo systemctl daemon-reload && \
sudo systemctl enable mcaptcha && \ # Auto startup during boot
sudo systemctl start mcaptcha
``
```