task 1-4

roles/reverse_proxy/defaults/main.yml

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+---
+woodpecker_domain: "ci.poc.mehl.mx"
+zot_domain: "registry.ci.poc.mehl.mx"
+zot_port: 5000
+letsencrypt_email: "dqdpoq@dwqiofiw.de"

roles/reverse_proxy/handlers/main.yml

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+---
+- name: Restart nginx
+  ansible.builtin.systemd_service:
+    name: nginx
+    state: restarted

roles/reverse_proxy/tasks/main.yml

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+---
+# Two-phase TLS setup: nginx first serves plain HTTP (for the certbot
+# webroot challenge), then certbot obtains real certs, then the TLS
+# vhosts (proxying to Woodpecker and Zot) are deployed and nginx reloaded.
+
+- name: Ensure certbot webroot directory exists
+  ansible.builtin.file:
+    path: "{{ certbot_webroot }}"
+    state: directory
+    mode: "0755"
+
+- name: Include geerlingguy.nginx role (HTTP-only vhosts for ACME challenge)
+  ansible.builtin.include_role:
+    name: geerlingguy.nginx
+
+- name: Include geerlingguy.certbot role (obtain certificates)
+  ansible.builtin.include_role:
+    name: geerlingguy.certbot
+
+- name: Deploy TLS vhost for Woodpecker
+  ansible.builtin.template:
+    src: woodpecker.conf.j2
+    dest: "/etc/nginx/sites-enabled/{{ woodpecker_domain }}.conf"
+    mode: "0644"
+  notify: Restart nginx
+
+- name: Deploy TLS vhost for Zot
+  ansible.builtin.template:
+    src: zot.conf.j2
+    dest: "/etc/nginx/sites-enabled/{{ zot_domain }}.conf"
+    mode: "0644"
+  notify: Restart nginx

roles/reverse_proxy/templates/woodpecker.conf.j2

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+server {
+    listen 443 ssl;
+    listen [::]:443 ssl;
+    server_name {{ woodpecker_domain }};
+
+    ssl_certificate /etc/letsencrypt/live/{{ woodpecker_domain }}/fullchain.pem;
+    ssl_certificate_key /etc/letsencrypt/live/{{ woodpecker_domain }}/privkey.pem;
+
+    client_max_body_size 64m;
+
+    location / {
+        proxy_pass http://127.0.0.1:8000;
+        proxy_http_version 1.1;
+        proxy_set_header Host $http_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 $scheme;
+
+        # Required for Woodpecker's websocket-based log streaming.
+        proxy_set_header Upgrade $http_upgrade;
+        proxy_set_header Connection "upgrade";
+    }
+}
+
+server {
+    listen 80;
+    listen [::]:80;
+    server_name {{ woodpecker_domain }};
+
+    location /.well-known/acme-challenge/ {
+        root /var/www/letsencrypt;
+    }
+    location / {
+        return 301 https://$host$request_uri;
+    }
+}

roles/reverse_proxy/templates/zot.conf.j2

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+server {
+    listen 443 ssl;
+    listen [::]:443 ssl;
+    server_name {{ zot_domain }};
+
+    ssl_certificate /etc/letsencrypt/live/{{ zot_domain }}/fullchain.pem;
+    ssl_certificate_key /etc/letsencrypt/live/{{ zot_domain }}/privkey.pem;
+
+    # Large blob/layer uploads for container images and OCI artifacts.
+    client_max_body_size 0;
+
+    location / {
+        proxy_pass http://127.0.0.1:{{ zot_port }};
+        proxy_http_version 1.1;
+        proxy_set_header Host $http_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 $scheme;
+        # Ensure a well-formed Content-Length reaches Zot instead of
+        # chunked transfer encoding, which Zot rejects on blob uploads.
+        proxy_request_buffering on;
+    }
+}
+
+server {
+    listen 80;
+    listen [::]:80;
+    server_name {{ zot_domain }};
+
+    location /.well-known/acme-challenge/ {
+        root /var/www/letsencrypt;
+    }
+    location / {
+        return 301 https://$host$request_uri;
+    }
+}

roles/reverse_proxy/vars/main.yml

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+---
+# HTTP-only vhosts, used for the initial certbot webroot challenge and
+# permanently for redirecting to HTTPS afterwards.
+nginx_vhosts:
+  - server_name: "{{ woodpecker_domain }}"
+    filename: "{{ woodpecker_domain }}.conf"
+    root: "/var/www/letsencrypt"
+    extra_parameters: |
+      location /.well-known/acme-challenge/ {
+        root /var/www/letsencrypt;
+      }
+      location / {
+        return 301 https://$host$request_uri;
+      }
+
+  - server_name: "{{ zot_domain }}"
+    filename: "{{ zot_domain }}.conf"
+    root: "/var/www/letsencrypt"
+    extra_parameters: |
+      location /.well-known/acme-challenge/ {
+        root /var/www/letsencrypt;
+      }
+      location / {
+        return 301 https://$host$request_uri;
+      }
+
+certbot_create_if_missing: true
+certbot_create_method: webroot
+certbot_webroot: /var/www/letsencrypt
+certbot_admin_email: "{{ letsencrypt_email }}"
+certbot_certs:
+  - domains:
+      - "{{ woodpecker_domain }}"
+  - domains:
+      - "{{ zot_domain }}"