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+# 2024-06 OFF1 reverse proxy install + OFF images container
+
+A new IP address has been allocated so that we can install a nginx reverse proxy on off1.
+The reverse proxy will directly serve static OFF product images.
+
+I (Stéphane) will follow what was done by Alex for the reverse proxy on off2: 2023-03-14-off2-opff-reinstall.md 
+
+
+## NGINX reverse proxy install
+
+### Installing Container
+
+I followed [How to create a new Container](../proxmox.md#how-to-create-a-new-container)
+
+I chose 4 cpu, 2 Gb RAM, 32 Gb disk (same as proxy on off2)
+
+CT number is 100
+
+debian-12-standard_12.2-1
+Network: name=eth0,bridge=vmbr1,ip=10.1.0.100/24,gw=10.0.0.1
+
+### Install nginx
+
+I then simply install `nginx` using apt.
+
+I also [configure postfix](../mail#postfix-configuration) and tested it.
+
+### Adding the IP
+
+Using proxmox interface, on container 100, I add net1, on vmbr0, IP 213.36.253.215/27, Gateway 213.36.253.222 (copied from Host config).
+
+I reboot the container 100, and it seems to work, I can access the nginx using the IP address.
+
+### declaring DNS entry
+
+I added an A record `off1-proxy.openfoodfacts.org` to point to this IP in OVH DNS zones.
+
+### Cloning git infra repository
+
+I created a ssh key as root:
+```bash
+ssh-keygen -t ed25519 -C "off@off1-proxy.openfoodfacts.org"
+cat /root/.ssh/id_ed25519.pub
+```
+and add it as [authorized key in openfoodfacts-infrastructure](https://github.com/openfoodfacts/openfoodfacts-infrastructure/settings/keys) with write authorization (as it will be mainly modified directly in the container).
+
+
+Then I cloned the repository in /opt
+```
+cd /opt
+git clone git@github.com:openfoodfacts/openfoodfacts-infrastructure.git
+```
+
+### Re-enforcing security thanks to fail2ban
+
+Install fail2ban.
+
+We reuse the existing `confs/proxy-off/fail2ban/jail.d/nginx` using debian provided feature for nginx
+Then:
+```bash
+sudo ln -s /opt/openfoodfacts-infrastructure/confs/proxy-off/fail2ban/jail.d/nginx.conf /etc/fail2ban/jail.d/
+systemctl reload fail2ban
+```
+
+**NOTE**: it's really not enough, but to analyze 403 / 401 we need a specific plugin that analyze logs.
+
+### Mounting volumes
+
+We will serve images directly from the reverse proxy (in order to not require to have a separate "images" container that serves images). The reason is to avoid having an extra nginx layer (with logs etc.) for image files that are requested very often.
+
+I edit /etc/pve/lxc/100.conf
+
+and add:
+
+mp0: /zfs-hdd/off/images,mp=/mnt/off/images
+mp1: /zfs-hdd/obf/images,mp=/mnt/obf/images
+mp3: /zfs-hdd/opff/images,mp=/mnt/opff/images
+
+TODO: For some reason /zfs-hdd/opf does not exist on the off1 host.
+
+
+### SSL certificates
+
+I copy the letsencrypt certificates and configurations from off2 host to the off1 reverse proxy.
+
+Then I install letsencrypt in the off1 reverse proxy container.
+
+sudo apt install certbot python3-certbot-nginx
+(fixed: at first I forgot the nginx plugin)
+
+#### Testing SSL renewals
+
+sudo certbot renew --dry-run
+
+Failed to renew certificate images.openfoodfacts.org with error: The requested nginx plugin does not appear to be installed
+
+Installed python3-certbot-nginx
+
+2nd try:
+
+Detail: 213.36.253.208: Fetching http://images.openfoodfacts.org/.well-known/acme-challenge/GUG0men38f_steRovK_AmCPyaV4lCyJUA3N8teSWp3I: Connection refused
+
+TODO: check if this is because the live images.openfoodfacts.org currently points to off2.
+
+
+### NGINX configuration
+
+We reuse the existing `log_format.conf` file with log format definition:
+```conf
+log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
+                  '$status $body_bytes_sent "$http_referer" '
+                  '"$http_user_agent" "$http_x_forwarded_for"';
+```
+It's in the git repository, so then:
+
+```bash
+ln -s /opt/openfoodfacts-infrastructure/confs/proxy-off/nginx/log_format.conf /etc/nginx/conf.d/log_format.conf
+```
+
+From off2 static-off configuration, I create a similar images-off site, and put it into git.
+
+```bash
+ln -s /opt/openfoodfacts-infrastructure/confs/off1-reverse-proxy/nginx/sites-available/images-off /etc/nginx/sites-enabled/
+```
+
+Changes from static-off:
+- I put log files in /var/log/nginx instead of a zfs mount
+- Path to images are to /mnt/off instead of /zfs-hdd/off as we are in a container and not the host
+- Removed the upstream directive which was not used
+- Fixed paths to SSL certificates (copied from off2 host)
+
+
+### Testing
+
+To test, I change my local /etc/hosts file to add:
+213.36.253.215 images.openfoodfacts.org
+
+The upstream times out:
+
+2024/06/04 13:25:25 [error] 1666#1666: *1 upstream timed out (110: Connection timed out) while connecting to upstream, client: 91.175.166.38, server: images.openfoodfacts.org, request: "GET /images/products/560/247/784/2456/front_fr.3.200.jpg HTTP/2.0", upstream: "https://213.36.253.214:443/images/products/560/247/784/2456/front_fr.3.200.jpg", host: "images.openfoodfacts.org", referrer: "https://fr.openfoodfacts.org/"
+
+We can't access proxy2.openfoodfacts.org from inside the container (why?)
+
+Changing:
+
+proxy_pass              https://proxy2.openfoodfacts.org;
+
+To use directly the IP of the off container:
+
+proxy_pass              http://10.1.0.113:80;
+
+Which works.
+
+
+### TODO
+
+- Also do the setup for OBF, OPF, OPFF: nginx configuration, SSL certificates etc.
+- Check why we don't have /zfs-hdd/opf on off1
+- Verify that off1 can renew the images.openfoodfacts.org SSL certificate
+- Export proxy logs and static logs to prometheus?
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