yum -y install https://mrmarkuz.dynu.net/mirror/mrmarkuz/7/noarch/nethserver-mrmarkuz-0.0.1-6.ns7.noarch.rpm
yum -y install nethserver-docker nethserver-nginx
curl -L "https://github.com/docker/compose/releases/download/v2.12.2/docker-compose-linux-$(uname -m)" -o /usr/local/bin/docker-compose
chmod +x /usr/local/bin/docker-compose
mkdir /opt/mastodon
cd /opt/mastodon

Get docker-compose.yml from github:

wget https://raw.githubusercontent.com/mastodon/mastodon/main/docker-compose.yml

Comment the build statements to not build the images, this saves a lot of time (only needed if we like to change mastodon code)

sed -i "s/ build/#build/g" docker-compose.yml

docker run --name postgres14 -v /opt/mastodon/postgres14:/var/lib/postgresql/data -e POSTGRES_PASSWORD=password --rm -d postgres:14-alpine

docker exec -it postgres14 psql -U postgres

Enter the following commands:

> CREATE USER mastodon WITH PASSWORD 'password' CREATEDB;
> exit

docker stop postgres14

touch .env.production
docker-compose run --rm web bundle exec rake mastodon:setup

It will take some time for this command to complete, and will eventually prompt you for setup information. Answer the questions as below:

You’ll now be shown the contents of the configuration file, which will look like this:

# Generated with mastodon:setup on 2022-11-03 12:27:03 UTC

# Some variables in this file will be interpreted differently whether you are
# using docker-compose or not.
LOCAL_DOMAIN=toot.yourdomain.org
SINGLE_USER_MODE=false 
SECRET_KEY_BASE=9adbeda17a4d0688f3a6b82b47a68a94ccbfd45e8c2cee20e9c0901d89b5985eb634e9e523fcb74c6702c06ffcc4ea97e3a5544304c4c6c97e97a6bbc2a5646d
OTP_SECRET=5635320b899a14148473fbe6f8b740607e08c9327c93a058c86804d3ad5b8db5023d3732fb4c0eb17e73e8adac689cc62b84c4c88299556934bd8780b5e8e6a4
VAPID_PRIVATE_KEY=KNjW5mNneoMTkmPG0NPl5jh3CfEaXAath9PgNUUkMWI=
VAPID_PUBLIC_KEY=BMWD6scX3Opxl9ROKZeFoSdr3olZWkNq--OblOgOIwhxbxOoDa6fMLcKAWf2lUNnZQcOMQVi7VpG8wYtJdjDi7w=
DB_HOST=mastodon_db_1
DB_PORT=5432
DB_NAME=mastodon
DB_USER=mastodon
DB_PASS=password
REDIS_HOST=mastodon_redis_1
REDIS_PORT=6379
REDIS_PASSWORD=
SMTP_SERVER=localhost
SMTP_PORT=25
SMTP_AUTH_METHOD=none
SMTP_OPENSSL_VERIFY_MODE=none
SMTP_FROM_ADDRESS=Mastodon <notifications@toot.yourdomain.org>

Despite what the terminal tells you, the configuration file has not been saved. You’ll need to save it yourself, so in another terminal (keep this one open), run:

cd /opt/mastodon
nano .env.production

Paste in these contents, save the file, and exit. Now return to the first terminal, where it’s asking more questions:

docker-compose up -d
docker network connect aqua mastodon-web-1

Add https redirect and reverse proxy by creating /etc/nginx/conf.d/mastodon.conf with following content and replace domain.org with the used domain name:

map $http_upgrade $connection_upgrade {
  default upgrade;
  ''	  close;
}

server {
  listen 80;
  listen [::]:80;
  server_name domain.org;
  root /opt/mastodon/public;
  # Useful for Let's Encrypt
  location /.well-known/acme-challenge/ { allow all; }
  location / { return 301 https://$host$request_uri; }
}

server {
  listen 443 ssl http2;
  listen [::]:443 ssl http2;
  server_name domain.org;

  ssl_protocols TLSv1.2;
  ssl_ciphers HIGH:!MEDIUM:!LOW:!aNULL:!NULL:!SHA;
  ssl_prefer_server_ciphers on;
  ssl_session_cache shared:SSL:10m;

  ssl_certificate     /etc/pki/tls/certs/localhost.crt;
  ssl_certificate_key /etc/pki/tls/private/localhost.key;

  keepalive_timeout    70;
  sendfile             on;
  client_max_body_size 80m;

  root /opt/mastodon/public;

  gzip on;
  gzip_disable "msie6";
  gzip_vary on;
  gzip_proxied any;
  gzip_comp_level 6;
  gzip_buffers 16 8k;
  gzip_http_version 1.1;
  gzip_types text/plain text/css application/json application/javascript text/xml application/xml 
application/xml+rss text/javascript;

  add_header Strict-Transport-Security "max-age=31536000";

  location / {
    try_files $uri @proxy;
  }

  location ~ ^/(emoji|packs|system/accounts/avatars|system/media_attachments/files) {
    add_header Cache-Control "public, max-age=31536000, immutable";
    try_files $uri @proxy;
  }

  location /sw.js {
    add_header Cache-Control "public, max-age=0";
    try_files $uri @proxy;
  }

  location @proxy {
    proxy_set_header Host $host;
    proxy_set_header X-Real-IP $remote_addr;
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    proxy_set_header X-Forwarded-Proto https;
    proxy_set_header Proxy "";
    proxy_pass_header Server;

    proxy_pass http://127.0.0.1:3000;
    proxy_buffering off;
    proxy_redirect off;
    proxy_http_version 1.1;
    proxy_set_header Upgrade $http_upgrade;
    proxy_set_header Connection $connection_upgrade;

    tcp_nodelay on;
  }

  location /api/v1/streaming {
    proxy_set_header Host $host;
    proxy_set_header X-Real-IP $remote_addr;
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    proxy_set_header X-Forwarded-Proto https;
    proxy_set_header Proxy "";

    proxy_pass http://127.0.0.1:4000;
    proxy_buffering off;
    proxy_redirect off;
    proxy_http_version 1.1;
    proxy_set_header Upgrade $http_upgrade;
    proxy_set_header Connection $connection_upgrade;

    tcp_nodelay on;
  }
  
  error_page 500 501 502 503 504 /500.html;
}

Disable httpd and enable nginx

systemctl disable httpd --now
systemctl enable nginx
systemctl restart nginx

Browse to the configured domain and login with admin mail and the noted password from the setup.