intial commit for nginx role

LICENSE

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+The MIT License (MIT)
+
+Copyright (c) 2024 Shane Wadleigh
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software is furnished to do so,
+subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

README.md

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+# ansible-roles-nginx
+
+This role is designed to provide a reverse proxy in conjuction with another role based deployment such as a metrics stack
+
+ - https://nginx.org/
+
+
+## Task Configuration
+
+```
+- name: Setup nginx
+  hosts: somehost
+  become: true
+  roles:
+    - role: nginx
+      nginx_sites:
+        - name: lmer2-frontend
+          url: lmer2.20c.com
+          upstream: http://localhost:8001
+          ssl: false
+    - role: firewalld
+      firewalld_services:
+        - http
+        - https
+      firewalld_ports:
+        - 8100/tcp # dashboard insecure mode
+      firewalld_forwards:
+        - port: 80
+          to: 8080
+        - port: 443
+          to: 8443
+```
+
+`ssl` can have a few different meaningful values
+-  undfefined will skip ssl entirely including its inclusion in the templates
+-  true, lets encrypt will request a cert
+-  false, lets encrypt will not request a cert but the template will assume a cert exists
+
+`ssl_barrow` can be set to the url of an existing cert to piggy back on another existing cert
+
+
+## Deployment and Removal
+
+
+Sometimes you need to manually stop the running containers to get a clean run when re-deploying
+Services must be stopped as the respecitve user or another means to aquire the correct user scope for systemd
+
+```
+systemctl --user stop container-nginx.service
+```
+
+Deploy
+
+```
+ansible-playbook -i hosts site.yml --tags=firewalld,nginx --limit=somehost
+```
+
+Remove
+
+```
+ansible-playbook -i hosts site.yml --tags=firewalld,nginx --extra-vars "container_state=absent firewall_action=remove" --limit=somehost
+```

defaults/main.yml

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+---
+nginx_packages_intall: true
+nginx_packages:
+  - nginx
+  - certbot
+  - python3-certbot-nginx
+
+nginx_path: /etc/nginx/conf.d
+nginx_default_template: basic-proxy
+
+nginx_proxy_connection_timeout: 10
+nginx_proxy_read_timeout: 200
+nginx_proxy_send_timeout: 200
+
+nginx_ssl_path: /etc/letsencrypt/live
+# define email for dyanmic certificates
+# nginx_ssl_email:

handlers/main.yml

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+---
+
+- name: Start/Enable nginx
+  listen: "restart nginx"
+  ansible.builtin.systemd:
+    name: nginx
+    state: restarted
+    enabled: true

meta/main.yml

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+---
+dependencies: []
+
+galaxy_info:
+  role_name: nginx
+  author: srw
+  description: An Ansible role for configuring ngix
+  company: "NMD, LLC"
+  license: "license (BSD, MIT)"
+  min_ansible_version: "2.10"
+  platforms:
+    - name: Fedora
+      versions:
+        - all
+    - name: Debian
+      versions:
+        - buster
+        - bullseye
+        - bookworm
+    - name: Ubuntu
+      versions:
+        - bionic
+        - focal
+        - jammy
+    - name: Alpine
+      version:
+        - all
+    - name: ArchLinux
+      versions:
+        - all
+  galaxy_tags:
+    - server
+    - system
+    - http
+    - nginx
+    - web
+    - proxy

tasks/main.yml

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+---
+- name: Role for setting up a nginx reverse proxy
+  block:
+
+  - name: gather local facts
+    set_fact:
+      local_user: "{{ lookup('env', 'USER') }}"
+      delegate_to: localhost
+
+  - name: nginx checking packages
+    ansible.builtin.include_tasks: packages.yml
+    tags: 
+      - nginx
+      - nginx-packages
+
+  - name: nginx setup configs
+    ansible.builtin.include_tasks: nginx.yml
+    tags: 
+      - nginx
+      - nginx-configs
+
+  - name: nginx setup ssl
+    ansible.builtin.include_tasks: ssl.yml
+    tags: 
+      - nginx
+      - nginx-ssl
+      
+  when:
+    - nginx_sites is defined
+

tasks/nginx.yml

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+---
+- name: Setup nginx configs
+  block:
+
+  - name: Set selinux http can connect
+    ansible.builtin.command: setsebool -P httpd_can_network_connect 1
+    when:
+      - ansible_os_family == "RedHat"
+
+  - name: Template nginx server name  hash config
+    ansible.builtin.template:
+      src: "templates/server-name-hash.conf.j2"
+      dest: "{{ nginx_path }}/server-name-hash.conf"
+      mode: 0644
+    notify: "restart nginx"
+    when:
+      - nginx_server_name_hash is number
+
+  - name: Template nginx configs
+    ansible.builtin.template:
+      src: "templates/{{ item.template | d(nginx_default_template) }}.conf.j2"
+      dest: "{{ nginx_path }}/{{ item.name }}.conf"
+      mode: 0644
+    loop: "{{ nginx_sites }}"
+    notify: "restart nginx"

tasks/packages.yml

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+---
+- name: Setup nginx packages
+  block:
+
+  - name: Install nginx packages
+    ansible.builtin.package:
+      name: "{{ item }}"
+      state: present
+    with_items: "{{ nginx_packages }}"
+  when:
+    - nginx_packages_intall

tasks/ssl.yml

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+---
+- name: Setup ssl certificates
+  block:
+  
+  - name: Request ssl certificates
+    ansible.builtin.command: certbot --nginx --agree-tos -n -m "{{ nginx_ssl_email }}" -d "{{ site.url }}"
+    args:
+      creates:
+        - "{{ nginx_ssl_path }}/{{ site.url }}/cert.pem"
+        - "{{ nginx_ssl_path }}/{{ site.url }}/chain.pem"
+        - "{{ nginx_ssl_path }}/{{ site.url }}/fullchain.pem"
+        - "{{ nginx_ssl_path }}/{{ site.url }}/privkey.pem"
+    vars:
+      ssl: true
+    when:
+      - site.ssl is defined
+      - site.ssl
+    loop: "{{ nginx_sites }}"
+    loop_control:
+      loop_var: site
+
+  - name: Add cron job for ssl renewal
+    ansible.builtin.cron:
+      name: "Renew ssl certs"
+      minute: "{{ 59 | random }}"
+      hour: "*/12"
+      job: "/usr/bin/certbot renew --nginx --quiet"
+    when:
+      - ssl is defined

templates/basic-proxy.conf.j2

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+# template: basic-proxy generated via ansible by {{ local_user }} at {{ ansible_date_time.time }} {{ ansible_date_time.date }}
+
+{% if item.ssl is defined %}
+server {
+        if ($host = {{ item.url }}) {
+            return 301 https://$host$request_uri;
+        }
+    
+        listen {% if item.listen is defined %}{{ item.listen }}:{% endif %}80;
+        server_name {{ item.url }};
+        return 404;
+}
+{% endif %}
+
+server {
+        listen {% if item.listen is defined %}{{ item.listen }}:{% endif %}{% if item.ssl is defined %}443 ssl http2{% else %}80{% endif %};
+        server_name {{ item.url }};
+        access_log /var/log/nginx/http-access-{{ item.name }}.log;
+  
+{% if item.ssl is defined %}
+{% if item.ssl_barrow is defined %}
+        ssl_certificate /etc/letsencrypt/live/{{ item.ssl_barrow }}/fullchain.pem;
+        ssl_certificate_key /etc/letsencrypt/live/{{ item.ssl_barrow }}/privkey.pem;
+{% else %}
+        ssl_certificate /etc/letsencrypt/live/{{ item.url }}/fullchain.pem;
+        ssl_certificate_key /etc/letsencrypt/live/{{ item.url }}/privkey.pem;
+{% endif %}
+        include /etc/letsencrypt/options-ssl-nginx.conf;
+        ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem;
+{% endif %}
+
+{% if item.configs is defined %}
+{% for config in item.configs %}
+       {{ config }};
+{% endfor -%}
+{% endif -%}
+
+        location / {
+                proxy_pass {{ item.upstream }};
+                proxy_pass_header Server;
+                proxy_set_header Host $http_host;
+                proxy_set_header X-Real-IP $remote_addr;
+                proxy_set_header X-Scheme $scheme;
+                proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+                proxy_set_header X-Forwarded-Proto $scheme;
+                proxy_set_header X-NginX-Proxy true;            
+                proxy_redirect off;
+                proxy_read_timeout {{ item.read_timeout | d(nginx_proxy_read_timeout) }};
+                proxy_send_timeout {{ item.send_timeout | d(nginx_proxy_send_timeout) }};
+                proxy_connect_timeout {{ item.connection_timeout | d(nginx_proxy_connection_timeout) }};
+        }    
+}

templates/server-name-hash.conf.j2

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+# template: server-name-hash generated via ansible by {{ local_user }} at {{ ansible_date_time.time }} {{ ansible_date_time.date }}
+
+server_names_hash_bucket_size {{ nginx_server_name_hash }};

templates/websocket-proxy.conf.j2

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+# template: websocket-proxy generated via ansible by {{ local_user }} on {{ ansible_date_time.time }} {{ ansible_date_time.date }}
+
+map $http_upgrade $connection_upgrade {
+        default upgrade;
+        ''      close;
+}
+
+{% if item.ssl is defined %}
+server {
+        if ($host = {{ item.url }}) {
+                return 301 https://$host$request_uri;
+        }
+    
+        listen {% if item.listen is defined %}{{ item.listen }}:{% endif %}80;
+        server_name {{ item.url }};
+        return 404;
+}
+{% endif %}
+
+server {
+        listen {% if item.listen is defined %}{{ item.listen }}:{% endif %}{% if item.ssl is defined %}443 ssl http2{% else %}80{% endif %};
+        server_name {{ item.url }};
+        access_log /var/log/nginx/http-access-{{ item.name }}.log;
+  
+{% if item.ssl is defined %}
+{% if item.ssl_barrow is defined %}
+        ssl_certificate_key /etc/letsencrypt/live/{{ item.ssl_barrow }}/privkey.pem;
+{% else %}
+        ssl_certificate /etc/letsencrypt/live/{{ item.url }}/fullchain.pem;
+        ssl_certificate_key /etc/letsencrypt/live/{{ item.url }}/privkey.pem;
+{% endif %}
+        include /etc/letsencrypt/options-ssl-nginx.conf;
+        ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem;
+{% endif %}
+
+{% if item.configs is defined %}
+{% for config in item.configs %}
+       {{ config }};
+{% endfor -%}
+{% endif -%} 
+
+        location / {
+                proxy_pass {{ item.upstream }};
+                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;
+                proxy_set_header Host $http_host;
+                proxy_set_header X-NginX-Proxy true;
+                proxy_redirect off;
+                proxy_http_version 1.1;
+                proxy_set_header Upgrade $http_upgrade;
+                proxy_set_header Connection $connection_upgrade;
+                proxy_read_timeout {{ item.read_timeout | d(nginx_proxy_read_timeout) }};
+                proxy_send_timeout {{ item.send_timeout | d(nginx_proxy_send_timeout) }};
+                proxy_connect_timeout {{ item.connection_timeout | d(nginx_proxy_connection_timeout) }};
+        }
+}

vars/Archlinux.yml

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+---
+promtail_journal: /run/log/journal
+
+podman_packages:
+  - podman
+  - cni-plugins
+  - fuse-overlayfs
+  - slirp4netns
+
+docker_packages:
+  - docker
+
+nginx_packages:
+  - nginx
+  - certbot
+  - certbot-nginx

vars/RedHat.yml

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+---
+promtail_journal: /run/log/journal
+
+podman_packages:
+  - podman
+  - systemd-container
+
+docker_packages:
+  - docker-ce
+
+nginx_packages:
+  - nginx
+  - httpd-tools
+  - certbot
+  - python3-certbot-nginx

vars/Ubuntu.yml

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+---
+promtail_journal: /var/log/journal
+
+podman_packages:
+  - podman
+  - systemd-container
+  - acl
+
+docker_packages:
+  - docker-ce
+  - docker-ce-cli
+  - containerd.io
+  - docker-compose
+  - sysdocker-compose-plugin
+
+nginx_packages:
+  - nginx
+  - certbot
+  - python3-certbot-nginx