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therealpaulgg authored Mar 27, 2024
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Expand Up @@ -118,6 +118,90 @@ This command is useful if you're decommissioning a machine or wish to start fres

By following these steps, you can seamlessly sync and manage your SSH keys across all your machines with SSH-Sync.

## Self-Hosting ssh-sync-server

In general, for self-hosting, we recommend a setup where ssh-sync-server is behind a reverse proxy (i.e Nginx), and SSL is handled via LetsEncrypt.

### Docker

Docker is the easiest way to run the server. Here is a simple `docker-compose` file you can use:

```yaml
version: '3.3'
services:
ssh-sync-server:
restart: always
environment:
- PORT=<your_port_here>
- NO_DOTENV=1
- DATABASE_USERNAME=sshsync
- DATABASE_PASSWORD=${POSTGRES_PASSWORD}
- DATABASE_HOST=ssh-sync-db:5432
logging:
driver: json-file
options:
max-size: 10m
ports:
- '<host_port>:<container_port>'
image: therealpaulgg/ssh-sync-server:latest
container_name: ssh-sync-server
ssh-sync-db:
image: therealpaulgg/ssh-sync-db:latest
container_name: ssh-sync-db
volumes:
- /path/to/db-volume:/var/lib/postgresql/data
environment:
- POSTGRES_USER=sshsync
- POSTGRES_PASSWORD=${POSTGRES_PASSWORD}
- POSTGRES_DB=sshsync
restart: always
```
### Nginx
Example Nginx config (must support websockets)
```nginx
server {
listen [::]:443 ssl ipv6only=on; # managed by Certbot
listen 443 ssl; # managed by Certbot
ssl_certificate /etc/letsencrypt/live/server.sshsync.io/fullchain.pem; # managed by Certbot
ssl_certificate_key /etc/letsencrypt/live/server.sshsync.io/privkey.pem; # managed by Certbot
include /etc/letsencrypt/options-ssl-nginx.conf; # managed by Certbot
ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem; # managed by Certbot
server_name server.sshsync.io;
location / {
proxy_pass http://127.0.0.1:<ssh-sync-server-port>;
proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection "Upgrade";
proxy_set_header Host $host;
proxy_set_header X-Forwarded-For $remote_addr;
proxy_set_header X-Real-IP $remote_addr;
}


}
server {
if ($host = server.sshsync.io) {
return 301 https://$host$request_uri;
} # managed by Certbot


listen 80;
listen [::]:80;
server_name server.sshsync.io;
return 404; # managed by Certbot


}
```

If you don't want to use docker, other methods of running are not supported at this time, but the source repos are linked below so you can configure your own server as you wish.

[ssh-sync-server Github](https://github.com/therealpaulgg/ssh-sync-server)
[ssh-sync-db](https://github.com/therealpaulgg/ssh-sync-db)

## How ssh-sync Works

ssh-sync leverages a client-server model to store and synchronize your SSH keys securely. The diagram below outlines the ssh-sync architecture and its workflow:
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