From 31aaf10a5c4c18f87e228469fdb6580a2734e8a0 Mon Sep 17 00:00:00 2001
From: NaeiKinDus <git@0x2a.ninja>
Date: Thu, 8 Aug 2024 00:00:00 +0000
Subject: [PATCH] feat(nginx): added new nginx role to install and configure
 nginx webservers

---
 .../roles/nginx/defaults/main.yml             |  8 ++
 .../roles/nginx/handlers/main.yml             | 28 ++++++
 .../infrastructure/roles/nginx/meta/main.yml  | 20 ++++
 .../infrastructure/roles/nginx/tasks/main.yml | 97 +++++++++++++++++++
 .../roles/nginx/tasks/nginx-config.yml        | 58 +++++++++++
 .../roles/nginx/tasks/nginx-service-entry.yml | 49 ++++++++++
 .../nginx/templates/ingress_http_nginx.nft.j2 |  9 ++
 .../roles/nginx/templates/nginx.conf.j2       | 44 +++++++++
 .../nginx/templates/nginx_limits.conf.j2      |  1 +
 .../roles/nginx/tests/inventory               |  2 +
 .../infrastructure/roles/nginx/tests/test.yml |  5 +
 .../infrastructure/roles/nginx/vars/main.yml  |  2 +
 inventory/host_vars/lithium/vars.yml          |  3 +
 playbooks/external.yml                        | 10 ++
 14 files changed, 336 insertions(+)
 create mode 100644 collections/ansible_collections/nullified/infrastructure/roles/nginx/defaults/main.yml
 create mode 100644 collections/ansible_collections/nullified/infrastructure/roles/nginx/handlers/main.yml
 create mode 100644 collections/ansible_collections/nullified/infrastructure/roles/nginx/meta/main.yml
 create mode 100644 collections/ansible_collections/nullified/infrastructure/roles/nginx/tasks/main.yml
 create mode 100644 collections/ansible_collections/nullified/infrastructure/roles/nginx/tasks/nginx-config.yml
 create mode 100644 collections/ansible_collections/nullified/infrastructure/roles/nginx/tasks/nginx-service-entry.yml
 create mode 100644 collections/ansible_collections/nullified/infrastructure/roles/nginx/templates/ingress_http_nginx.nft.j2
 create mode 100644 collections/ansible_collections/nullified/infrastructure/roles/nginx/templates/nginx.conf.j2
 create mode 100644 collections/ansible_collections/nullified/infrastructure/roles/nginx/templates/nginx_limits.conf.j2
 create mode 100644 collections/ansible_collections/nullified/infrastructure/roles/nginx/tests/inventory
 create mode 100644 collections/ansible_collections/nullified/infrastructure/roles/nginx/tests/test.yml
 create mode 100644 collections/ansible_collections/nullified/infrastructure/roles/nginx/vars/main.yml

diff --git a/collections/ansible_collections/nullified/infrastructure/roles/nginx/defaults/main.yml b/collections/ansible_collections/nullified/infrastructure/roles/nginx/defaults/main.yml
new file mode 100644
index 0000000..78c8456
--- /dev/null
+++ b/collections/ansible_collections/nullified/infrastructure/roles/nginx/defaults/main.yml
@@ -0,0 +1,8 @@
+---
+nginx_extra_packages: []
+nginx_custom_config: false
+nginx_limits_nofile: 524288
+nginx_service_user: nginx
+nginx_service_group: nginx
+nginx_sites: []
+nginx_streams: []
diff --git a/collections/ansible_collections/nullified/infrastructure/roles/nginx/handlers/main.yml b/collections/ansible_collections/nullified/infrastructure/roles/nginx/handlers/main.yml
new file mode 100644
index 0000000..46f6587
--- /dev/null
+++ b/collections/ansible_collections/nullified/infrastructure/roles/nginx/handlers/main.yml
@@ -0,0 +1,28 @@
+---
+- name: restart firewall service
+  become: true
+  ansible.builtin.systemd_service:
+    name: nftables.service
+    enabled: true
+    state: restarted
+
+- name: reload nginx service
+  become: true
+  ansible.builtin.systemd_service:
+    name: nginx.service
+    enabled: true
+    state: reloaded
+
+- name: check configuration is valid
+  become: true
+  ansible.builtin.command: /usr/sbin/nginx -t -q
+  changed_when: false
+  listen: 'nginx : restart nginx service'
+
+- name: restart service
+  become: true
+  ansible.builtin.systemd_service:
+    name: nginx.service
+    enabled: true
+    state: restarted
+  listen: 'nginx : restart nginx service'
diff --git a/collections/ansible_collections/nullified/infrastructure/roles/nginx/meta/main.yml b/collections/ansible_collections/nullified/infrastructure/roles/nginx/meta/main.yml
new file mode 100644
index 0000000..a2fbde3
--- /dev/null
+++ b/collections/ansible_collections/nullified/infrastructure/roles/nginx/meta/main.yml
@@ -0,0 +1,20 @@
+---
+galaxy_info:
+  author: Florian L.
+  namespace: nullified
+  description: Install and configure Nginx webserver
+  # issue_tracker_url: http://example.com/issue/tracker
+  license: MIT
+  min_ansible_version: 2.15
+
+  # https://galaxy.ansible.com/api/v1/platforms/
+  platforms:
+    - name: Debian
+      versions:
+        - bookworm
+
+  galaxy_tags:
+    - nginx
+    - webserver
+
+dependencies: []
diff --git a/collections/ansible_collections/nullified/infrastructure/roles/nginx/tasks/main.yml b/collections/ansible_collections/nullified/infrastructure/roles/nginx/tasks/main.yml
new file mode 100644
index 0000000..f5a8418
--- /dev/null
+++ b/collections/ansible_collections/nullified/infrastructure/roles/nginx/tasks/main.yml
@@ -0,0 +1,97 @@
+---
+- name: install requirements
+  become: true
+  ansible.builtin.apt:
+    update_cache: true
+    force_apt_get: true
+    cache_valid_time: 3600
+    pkg:
+      - ca-certificates
+      - curl
+      - debian-archive-keyring
+      - gnupg2
+      - lsb-release
+
+- name: install nginx repository
+  become: true
+  ansible.builtin.deb822_repository:
+    allow_downgrade_to_insecure: false
+    allow_insecure: false
+    allow_weak: false
+    components:
+      - nginx
+    enabled: true
+    name: nginx
+    signed_by: 'https://nginx.org/keys/nginx_signing.key'
+    state: present
+    suites: '{{ ansible_facts.distribution_release }}'
+    trusted: true
+    uris: 'http://nginx.org/packages/mainline/debian'
+
+- name: pin nginx packages
+  become: true
+  ansible.builtin.copy:
+    content: |-
+      Package: *
+      Pin: origin nginx.org
+      Pin: release o=nginx
+      Pin-Priority: 900
+    dest: /etc/apt/preferences.d/55-nginx
+    mode: '0600'
+    owner: root
+    group: root
+
+- name: update cache and install nginx package
+  become: true
+  ansible.builtin.apt:
+    cache_valid_time: 0
+    force_apt_get: true
+    update_cache: true
+    pkg: '{{ nginx_extra_packages | default([]) + ["nginx"] }}'
+
+- ansible.builtin.include_tasks:
+    file: nginx-config.yml
+    apply:
+      tags: [webserver-config]
+  tags: [webserver-config]
+
+- name: setup firewall rules
+  become: true
+  ansible.builtin.template:
+    src: ../templates/ingress_http_nginx.nft.j2
+    dest: /etc/nftables.d/ingress_http_nginx.nft
+    owner: root
+    group: root
+    mode: '0600'
+  notify:
+    - 'nginx : restart firewall service'
+
+- ansible.builtin.include_tasks:
+    file: nginx-service-entry.yml
+    apply:
+      tags: [webserver-sites]
+  tags: [webserver-sites]
+  vars:
+    nginx_entry_type: site
+  loop: '{{ nginx_sites }}'
+  loop_control:
+    label: '{{ item.name }}'
+- ansible.builtin.include_tasks:
+    file: nginx-service-entry.yml
+    apply:
+      tags: [webserver-streams]
+  tags: [webserver-streams]
+  vars:
+    nginx_entry_type: stream
+  loop: '{{ nginx_streams }}'
+  loop_control:
+    label: '{{ item.name }}'
+
+- name: set permissions
+  become: true
+  ansible.builtin.file:
+    path: /etc/nginx
+    owner: '{{ nginx_service_user }}'
+    group: '{{ nginx_service_user }}'
+    mode: 'u=rwX,g=rX,o='
+    recurse: true
diff --git a/collections/ansible_collections/nullified/infrastructure/roles/nginx/tasks/nginx-config.yml b/collections/ansible_collections/nullified/infrastructure/roles/nginx/tasks/nginx-config.yml
new file mode 100644
index 0000000..ebec5a5
--- /dev/null
+++ b/collections/ansible_collections/nullified/infrastructure/roles/nginx/tasks/nginx-config.yml
@@ -0,0 +1,58 @@
+---
+- name: setup configuration directories
+  become: true
+  ansible.builtin.file:
+    path: '/etc/nginx/{{ item }}'
+    state: directory
+    owner: '{{ nginx_service_user }}'
+    group: '{{ nginx_service_group }}'
+    mode: '0750'
+  loop:
+    - ssl
+    - ssl/certificates
+    - ssl/keys
+    - sites-available
+    - sites-enabled
+    - streams-available
+    - streams-enabled
+
+- name: generate dhparams.pem file
+  become: true
+  ansible.builtin.command:
+    cmd: /usr/bin/openssl dhparam -out /etc/nginx/ssl/dhparams.pem 4096
+    creates: /etc/nginx/ssl/dhparams.pem
+  notify:
+    - 'nginx : restart nginx service'
+
+- name: setup nginx.conf
+  become: true
+  block:
+    - name: use default configuration
+      ansible.builtin.template:
+        src: ../templates/nginx.conf.j2
+        dest: /etc/nginx/nginx.conf
+        owner: '{{ nginx_service_user }}'
+        group: '{{ nginx_service_group }}'
+        mode: '0640'
+      when: nginx_custom_config is falsy
+    - name: use custom configuration
+      ansible.builtin.copy:
+        content: '{{ nginx_custom_config }}'
+        dest: /etc/nginx/nginx.conf
+        owner: '{{ nginx_service_user }}'
+        group: '{{ nginx_service_group }}'
+        mode: '0640'
+      when: nginx_custom_config is truthy
+  notify:
+    - 'nginx : restart nginx service'
+
+- name: set process limits
+  become: true
+  ansible.builtin.template:
+    src: ../templates/nginx_limits.conf.j2
+    dest: /etc/security/limits.d/nginx.conf
+    owner: root
+    group: root
+    mode: '0600'
+  notify:
+    - 'nginx : restart nginx service'
diff --git a/collections/ansible_collections/nullified/infrastructure/roles/nginx/tasks/nginx-service-entry.yml b/collections/ansible_collections/nullified/infrastructure/roles/nginx/tasks/nginx-service-entry.yml
new file mode 100644
index 0000000..d46d627
--- /dev/null
+++ b/collections/ansible_collections/nullified/infrastructure/roles/nginx/tasks/nginx-service-entry.yml
@@ -0,0 +1,49 @@
+---
+- name: set facts
+  ansible.builtin.set_fact:
+    safe_filename: "{{ item.name | regex_replace('[^\\w]', '') }}"
+    nginx_entry_type: '{{ nginx_entry_type | default(item.get("entry_type", None)) }}'
+
+- name: perform sanity checks
+  ansible.builtin.assert:
+    that:
+      - nginx_entry_type in ["stream", "site"]
+    fail_msg: Invalid value for `nginx_entry_type`; expected "stream" or "site", got "{{ nginx_entry_type }}"
+
+- name: 'copy entry in {{ nginx_entry_type }}s-available'
+  become: true
+  ansible.builtin.copy:
+    content: '{{ item.content }}'
+    dest: "/etc/nginx/{{ nginx_entry_type }}s-available/{{ safe_filename }}.conf"
+    owner: '{{ nginx_service_user }}'
+    group: '{{ nginx_service_user }}'
+    mode: '0640'
+  when: item.get('state', 'present') == 'present'
+  notify:
+    - 'nginx : reload nginx service'
+
+- name: 'enable {{ nginx_entry_type }}'
+  become: true
+  ansible.builtin.file:
+    src: "/etc/nginx/{{ nginx_entry_type }}s-available/{{ safe_filename }}.conf"
+    path: "/etc/nginx/{{ nginx_entry_type }}s-enabled/{{ safe_filename }}.conf"
+    owner: '{{ nginx_service_user }}'
+    group: '{{ nginx_service_user }}'
+    state: 'link'
+  when: item.get('state', 'present') == 'present'
+  notify:
+    - 'nginx : reload nginx service'
+
+- name: 'disable {{ nginx_entry_type }}'
+  become: true
+  ansible.builtin.file:
+    path: "/etc/nginx/{{ nginx_entry_type }}s-enabled/{{ safe_filename }}.conf"
+    state: absent
+  when: item.get('state', 'present') in ['disabled', 'deleted']
+
+- name: 'remove {{ nginx_entry_type }}'
+  become: true
+  ansible.builtin.file:
+    path: "/etc/nginx/{{ nginx_entry_type }}s-available/{{ safe_filename }}.conf"
+    state: absent
+  when: item.get('state', 'present') == 'deleted'
diff --git a/collections/ansible_collections/nullified/infrastructure/roles/nginx/templates/ingress_http_nginx.nft.j2 b/collections/ansible_collections/nullified/infrastructure/roles/nginx/templates/ingress_http_nginx.nft.j2
new file mode 100644
index 0000000..9d335fe
--- /dev/null
+++ b/collections/ansible_collections/nullified/infrastructure/roles/nginx/templates/ingress_http_nginx.nft.j2
@@ -0,0 +1,9 @@
+table inet filter {
+    chain input {
+        meta nfproto { ipv4, ipv6 } tcp dport { http, https } accept
+    }
+
+    chain output {
+        meta nfproto { ipv4, ipv6 } tcp sport { http, https } accept
+    }
+}
diff --git a/collections/ansible_collections/nullified/infrastructure/roles/nginx/templates/nginx.conf.j2 b/collections/ansible_collections/nullified/infrastructure/roles/nginx/templates/nginx.conf.j2
new file mode 100644
index 0000000..28be4b2
--- /dev/null
+++ b/collections/ansible_collections/nullified/infrastructure/roles/nginx/templates/nginx.conf.j2
@@ -0,0 +1,44 @@
+user              {{ nginx_service_user }};
+worker_processes  auto;
+
+error_log         /var/log/nginx/error.log notice;
+pid               /var/run/nginx.pid;
+
+events {
+    worker_connections  1024;
+}
+
+http {
+    include           /etc/nginx/mime.types;
+    default_type      application/octet-stream;
+
+    log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
+                      '$status $body_bytes_sent "$http_referer" '
+                      '"$http_user_agent" "$http_x_forwarded_for"';
+
+    access_log        /var/log/nginx/access.log  main;
+
+    sendfile          on;
+    server_tokens     off;
+
+    ssl_ciphers   ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384:DHE-RSA-CHACHA20-POLY1305;
+    ssl_dhparam   /etc/nginx/ssl/dhparams.pem;
+    ssl_prefer_server_ciphers off;
+    ssl_protocols TLSv1.2 TLSv1.3;
+    ssl_ecdh_curve x25519:secp256r1:secp521r1:secp384r1;
+
+    keepalive_timeout 65;
+
+    include /etc/nginx/sites-enabled/*.conf;
+}
+
+stream {
+    log_format proxy '$remote_addr [$time_local] '
+           '$protocol $status $bytes_sent $bytes_received '
+           '$session_time "$upstream_addr" "-- $ssl_preread_server_name --"'
+           '"$upstream_bytes_sent" "$upstream_bytes_received" "$upstream_connect_time"';
+
+    access_log        /var/log/nginx/stream-access.log proxy;
+
+    include /etc/nginx/streams-enabled/*.conf;
+}
diff --git a/collections/ansible_collections/nullified/infrastructure/roles/nginx/templates/nginx_limits.conf.j2 b/collections/ansible_collections/nullified/infrastructure/roles/nginx/templates/nginx_limits.conf.j2
new file mode 100644
index 0000000..691b000
--- /dev/null
+++ b/collections/ansible_collections/nullified/infrastructure/roles/nginx/templates/nginx_limits.conf.j2
@@ -0,0 +1 @@
+nginx  -  nofile  {{ nginx_limits_nofile }}
diff --git a/collections/ansible_collections/nullified/infrastructure/roles/nginx/tests/inventory b/collections/ansible_collections/nullified/infrastructure/roles/nginx/tests/inventory
new file mode 100644
index 0000000..878877b
--- /dev/null
+++ b/collections/ansible_collections/nullified/infrastructure/roles/nginx/tests/inventory
@@ -0,0 +1,2 @@
+localhost
+
diff --git a/collections/ansible_collections/nullified/infrastructure/roles/nginx/tests/test.yml b/collections/ansible_collections/nullified/infrastructure/roles/nginx/tests/test.yml
new file mode 100644
index 0000000..261c779
--- /dev/null
+++ b/collections/ansible_collections/nullified/infrastructure/roles/nginx/tests/test.yml
@@ -0,0 +1,5 @@
+---
+- hosts: localhost
+  remote_user: root
+  roles:
+    - nginx
diff --git a/collections/ansible_collections/nullified/infrastructure/roles/nginx/vars/main.yml b/collections/ansible_collections/nullified/infrastructure/roles/nginx/vars/main.yml
new file mode 100644
index 0000000..1fc4c53
--- /dev/null
+++ b/collections/ansible_collections/nullified/infrastructure/roles/nginx/vars/main.yml
@@ -0,0 +1,2 @@
+---
+nginx_repository_signing_key_url: 'https://nginx.org/keys/nginx_signing.key'
diff --git a/inventory/host_vars/lithium/vars.yml b/inventory/host_vars/lithium/vars.yml
index e7c8a02..54b86be 100644
--- a/inventory/host_vars/lithium/vars.yml
+++ b/inventory/host_vars/lithium/vars.yml
@@ -1,3 +1,6 @@
 ansible_become_password: "{{ vault_root_pass }}"
 ansible_host: "{{ vault_ansible_host }}"
 ansible_user: "{{ vault_ssh_user }}"
+nginx_extra_packages: [nginx-module-geoip, nginx-module-otel]
+nginx_sites: "{{ vault_nginx_sites }}"
+nginx_streams: "{{ vault_nginx_streams }}"
diff --git a/playbooks/external.yml b/playbooks/external.yml
index 14bc88b..d29c1ab 100644
--- a/playbooks/external.yml
+++ b/playbooks/external.yml
@@ -37,3 +37,13 @@
         apply:
           tags: [server]
       tags: [server]
+
+- name: setup web servers
+  hosts: external:&webserver
+  tasks:
+    - name: include nginx role
+      ansible.builtin.include_role:
+        name: nullified.infrastructure.nginx
+        apply:
+          tags: [webserver]
+      tags: [webserver, webserver-config, webserver-sites, webserver-streams]