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docs/deployment.md
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# Deployment Guide: Nexus Timer
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This guide outlines the steps to deploy and manage the Nexus Timer application on a server using Docker, Traefik (as a reverse proxy), and systemd, with an optional automated deployment via Gitea webhooks.
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## Table of Contents
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1. [Initial Server Setup](#initial-server-setup)
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2. [Exposing the App Behind Traefik](#exposing-the-app-behind-traefik-reverse-proxy)
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3. [Automating Updates with Webhooks (Gitea)](#automating-updates-with-webhooks-gitea)
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4. [Manual Updates (Fallback)](#manual-updates-fallback)
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5. [Troubleshooting & Logs](#troubleshooting--logs)
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## Initial Server Setup
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### On the Server
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Navigate to your preferred service directory on the server (e.g., `/virt`).
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```bash
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cd /virt
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```
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Clone the repository (only the latest commit for faster cloning).
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```bash
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git clone --depth 1 https://gitea.virtonline.eu/2HoursProject/nexus-timer.git
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cd nexus-timer
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```
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If you will run the container on the Docker network `traefik` (or any other pre-existing network), find its IP subnet to allow Nginx inside the container to correctly identify the real client IP.
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```bash
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docker network inspect traefik --format '{{(index .IPAM.Config 0).Subnet}}'
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```
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You'll get an output like `172.22.0.0/16`.
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Set this subnet in the `nginx.conf` file within your cloned repository before building the image. For example:
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```bash
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set_real_ip_from 172.22.0.0/16;
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```
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Build the Docker image for the application.
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```bash
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docker build -t virt-nexus-timer .
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```
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## Exposing the App Behind Traefik (Reverse Proxy)
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This setup assumes you have Traefik running and configured to watch for Docker labels.
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### Review the provided docker labels and systemd service file
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The `docker/traefik.labels` file contains Docker labels that Traefik uses for routing and HTTPS. Review and adjust them if necessary.
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Copy the example label file to its destination (one level up, to be read by systemd).
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```bash
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cp docker/traefik.labels labels
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```
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View the example systemd service definition to understand how the Docker container will be managed.
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```bash
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cat systemd/virt-nexus-timer.service
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```
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### Create the systemd service
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Use `systemctl edit` to create or overwrite the service file. This is the recommended way to manage custom systemd units.
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```bash
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sudo systemctl edit --force --full virt-nexus-timer.service
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```
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The editor will open. Paste the content from your `systemd/virt-nexus-timer.service` file into the editor, then save and exit (e.g., Ctrl+X, then Y, then Enter in nano).
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Enable the service to start on system boot and start it immediately.
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```bash
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sudo systemctl enable --now virt-nexus-timer.service
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```
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Check the service status to ensure it's running correctly.
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```bash
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systemctl status virt-nexus-timer.service
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```
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Look for "active (running)".
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### Test the web application
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Verify that the application is accessible via HTTPS through Traefik:
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```bash
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curl https://nexus-timer.virtonline.eu
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```
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Or open it in your browser:
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[https://nexus-timer.virtonline.eu](https://nexus-timer.virtonline.eu)
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## Automating Updates with Webhooks (Gitea)
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Instead of manually pulling, building, and restarting on the server, you can automate this process using a webhook. Gitea will notify a webhook service running on your server, which will then execute a deployment script.
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Install the `webhook` service
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```bash
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sudo install webhook
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```
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Allow your Gitea instance to reach the webhook service on your server (e.g., `10.0.0.1:9000`). Ensure Gitea's `ALLOWED_HOST_LIST` in its `app.ini` includes this IP.
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### The Redeployment Script
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The `webhook` service will execute the script `hooks/redeploy.sh`. If webhook runs as a non-root user (recommended), that user will need passwordless sudo permission to restart the `virt-nexus-timer.service`.
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You can grant this by editing the sudoers file:
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```bash
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sudo visudo
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```
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and adding a line like:
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```bash
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webhooksvc ALL=(ALL) NOPASSWD: /usr/bin/systemctl restart virt-nexus-timer.service
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```
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Replace `webhooksvc` with the actual user webhook runs as. If webhook runs as root, this is not necessary but less secure overall.
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### Configure the `webhook` Service
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Create or edit the main webhook configuration file, typically at `/etc/webhook.conf`. Add the JSON object from `hooks/webhook.conf` to the array in the file (or create the file if it's new).
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**Note:** Replace `YOUR_VERY_STRONG_SECRET_TOKEN_HERE_REPLACE_ME` with a strong, unique secret.
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### Set Up webhook as a Systemd Service
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Use `systemctl edit` to create or overwrite the service file. This is the recommended way to manage custom systemd units.
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```bash
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sudo systemctl edit --force --full webhook.service
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```
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The editor will open. Paste the content from your `systemd/webhook.service` file into the editor, then save and exit (e.g., Ctrl+X, then Y, then Enter in nano).
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Enable, and start the webhook service:
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```bash
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sudo systemctl enable --now webhook.service
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sudo systemctl status webhook.service
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```
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### Configure Webhook in Gitea
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1. Navigate to your Gitea repository: `https://gitea.virtonline.eu/2HoursProject/nexus-timer`
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2. Go to `Settings -> Webhooks`.
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3. Click Add Webhook and choose `Gitea`.
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4. **Target URL**: `http://10.0.0.1:9000/hooks/redeploy-nexus-timer`
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*(The redeploy-nexus-timer part must match the id in your /etc/webhook.conf)*
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5. **HTTP Method**: POST
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6. **POST Content Type**: application/json
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7. **Secret**: Enter the exact same strong secret token you used in `/etc/webhook.conf` (e.g., `YOUR_VERY_STRONG_SECRET_TOKEN_HERE_REPLACE_ME`).
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8. **Trigger On**:
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Select `Push Events`.
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You can further refine this to specific branches if your `webhook.conf` doesn't already filter by branch (though redundant filtering is fine).
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9. Ensure `Enable this webhook` is checked.
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10. Click `Add Webhook`.
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### Test the Webhook
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* In Gitea, on the Webhooks settings page for the webhook you just created, click `Test Delivery`.
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* Check the Gitea UI for the response. It should show a `200 OK` and include the output from your `redeploy.sh` script.
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* Push a small change to your `main` (or configured) branch to trigger a real deployment.
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### Firewall Considerations
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If your server has a firewall (e.g., `ufw`), ensure that port `9000` (or whichever port you configured for `webhook`) is allowed for incoming connections from your Gitea server's IP address or network.
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Example for `ufw` allowing any connection to `10.0.0.1:9000` (restrict source IP if possible):
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```bash
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sudo ufw allow to 10.0.0.1 port 9000 proto tcp comment 'Gitea Webhook'
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```
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If Gitea is external, use its specific source IP instead of 'any' for better security.
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```bash
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sudo ufw allow from <GITEA_SERVER_IP> to 10.0.0.1 port 9000 proto tcp comment 'Gitea Webhook'
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```
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Reload `ufw` if changes are made:
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```bash
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sudo ufw reload
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```
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## Manual Updates (Fallback)
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Navigate to the application directory on your server.
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```bash
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cd /virt/nexus-timer
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```
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Pull the latest changes from the repository, rebuild the Docker image, and restart the systemd service.
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```bash
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git pull && docker build -t virt-nexus-timer . && sudo systemctl restart virt-nexus-timer.service
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```
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The previously installed Progressive Web App (PWA) should update automatically upon next launch or offer an upgrade prompt.
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## Troubleshooting & Logs
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View real-time logs for the application service:
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```bash
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journalctl -fu virt-nexus-timer.service
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```
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View real-time logs for the `webhook` service:
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```bash
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journalctl -fu webhook.service
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```
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Check the custom log file for the redeployment script (if configured):
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```bash
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tail -f /var/log/webhook-redeploy-nexus-timer.log
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```
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Check Gitea's webhook delivery logs for request/response details and errors.
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