feat: Webserver installation by Ansible

webserver/.gitignore

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+hosts.ini
+*.pub

webserver/README.md

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+# Install Webserver
+
+## How to
+
+Copy then change values of hosts example file
+
+```bash
+$ cp hosts.example.ini hosts.ini
+```
+
+Then run the playbook:
+
+```bash
+DBPASSWORD="$(date +%s | sha256sum | base64 | head -c 32 ; echo)"
+
+ansible-playbook -i hosts.ini playbook.yml \
+  -e db_root_password=$DBPASSWORD
+```

webserver/hosts.example.ini

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+[webservers]
+example.com
+
+[webservers:vars]
+ansible_python_interpreter=/usr/bin/python3

webserver/playbook.yml

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+---
+
+- hosts: webservers
+  become: true
+
+  pre_tasks:
+    - name: install commons
+      apt:
+        name:
+          - python3-pip
+        update_cache: yes
+
+  roles:
+    - {role: nginx, tags: nginx}
+    - {role: wwwuser, tags: wwwuser}
+    - {role: certbot, tags: certbot}
+    - {role: php, tags: php}
+    - {role: mariadb, tags: mariadb}
+    - {role: firewall, tags: firewall}

webserver/roles/certbot/tasks/main.yml

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+- name: install letsencrypt
+  apt:
+    name:
+      - letsencrypt
+      - python3-certbot-nginx
+    state: present
+    update_cache: yes
+
+- name: create letsencrypt's challenge directory
+  file:
+    name: /var/www/letsencrypt
+    state: directory
+
+- name: generate letsencrypt's dhparams
+  shell: openssl dhparam -out /etc/letsencrypt/ssl-dhparams.pem 2048
+  args:
+    creates: /etc/letsencrypt/ssl-dhparams.pem

webserver/roles/firewall/tasks/main.yml

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+- name: allow ssh
+  ufw:
+    rule: allow
+    name: OpenSSH
+
+- name: allow http/https
+  ufw:
+    rule: allow
+    name: Nginx Full
+
+- name: enable and deny by default
+  ufw:
+    state: enabled
+    default: deny

webserver/roles/mariadb/tasks/main.yml

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+- name: install
+  apt:
+    name:
+      - mariadb-server
+      - libmysqlclient-dev
+    state: present
+    update_cache: yes
+
+- name: install python client
+  pip:
+    name: mysqlclient
+    state: present
+
+- name: ensure service is start
+  service:
+    name: mysql
+    state: started
+    enabled: yes
+
+- name: change root password
+  mysql_user:
+    name: root
+    password: '{{ db_root_password }}'
+    host: 'localhost'
+
+- name: write root credentials
+  template:
+    src: my.cnf.j2
+    dest: /root/.my.cnf
+    mode: '0600'

webserver/roles/mariadb/templates/my.cnf.j2

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+[client]
+user=root
+password={{ db_root_password }}

webserver/roles/nginx/handlers/main.yml

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+- name: restart nginx
+  service:
+    name: nginx
+    state: restarted

webserver/roles/nginx/tasks/main.yml

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+- name: install nginx
+  apt:
+    name:
+      - nginx
+    state: present
+    update_cache: yes
+
+- name: define www user as default user
+  replace:
+    path: "/etc/nginx/nginx.conf"
+    regexp: '{{ item.from }}'
+    replace: "{{ item.to }}"
+  with_items:
+    - {from: '^user (.+);$', to: 'user {{ www_user }};'}
+  notify: restart nginx

webserver/roles/php/defaults/main.yml

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+php_version: 8.1
+
+php_packages:
+  - php{{ php_version }}-common
+  - php{{ php_version }}-zip
+  - php{{ php_version }}-pdo
+  - php{{ php_version }}-mbstring
+  - php{{ php_version }}-tokenizer
+  - php{{ php_version }}-xml
+  - php{{ php_version }}-opcache
+  - php{{ php_version }}-mysql
+  - php{{ php_version }}-imap
+  - php{{ php_version }}-curl
+  - php{{ php_version }}-memcached
+  - php{{ php_version }}-intl
+  - php{{ php_version }}-gd
+  - php{{ php_version }}-bcmath

webserver/roles/php/handlers/main.yml

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+- name: restart php-fpm
+  service:
+    name: php{{ php_version }}-fpm
+    state: restarted

webserver/roles/php/tasks/main.yml

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+- name: add repository
+  apt_repository:
+    repo: ppa:ondrej/php
+    state: present
+    update_cache: yes
+
+- name: install package
+  apt:
+    name: "php{{ php_version }}-fpm"
+    state: present
+    update_cache: yes
+    install_recommends: no
+
+- name: install extensions
+  apt:
+    name: "{{ php_packages | list }}"
+    state: present
+    install_recommends: no
+
+- name: change default version
+  alternatives:
+    name: php
+    path: /usr/bin/php{{ php_version }}
+
+- name: define www user as php-fpm's default user
+  replace:
+    path: "/etc/php/{{ php_version }}/fpm/pool.d/www.conf"
+    regexp: '{{ item.from }}'
+    replace: "{{ item.to }}"
+  with_items:
+    - {from: '^user = (.+)$', to: 'user = {{ www_user }}'}
+    - {from: '^group = (.+)$', to: 'group = {{ www_user }}'}
+    - {from: '^listen.owner = (.+)$', to: 'listen.owner = {{ www_user }}'}
+    - {from: '^listen.group = (.+)$', to: 'listen.group = {{ www_user }}'}
+  notify: restart php-fpm

webserver/roles/wwwuser/defaults/main.yml

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+www_user: pilot
+www_group: pilot
+www_home: "/home/{{ www_user }}"

webserver/roles/wwwuser/tasks/main.yml

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+- name: create wwwuser group
+  group:
+    name: "{{ www_group }}"
+    state: present
+    system: true
+
+- name: create wwwuser user
+  user:
+    name: "{{ www_user }}"
+    group: "{{ www_group }}"
+    comment: "Web user"
+    shell: /bin/bash
+    home: "{{ www_home }}"
+    system: true
+    state: present
+
+- name: set ssh authorized keys
+  authorized_key:
+    user: "{{ www_user }}"
+    key: "{{ item }}"
+  with_items:
+    - "{{ lookup('file', 'id.pub') }}"
+
+- name: create app's directory
+  file:
+    path: "{{ www_home }}/apps"
+    state: directory
+    owner: "{{ www_user }}"
+    group: "{{ www_group }}"
+
+- name: add permission to wwwuser to reload php-fpm
+  lineinfile:
+    dest: /etc/sudoers
+    state: present
+    regexp: '^{{ www_user }} ALL=NOPASSWD: /usr/sbin/service php{{ php_version }}-fpm reload$'
+    line: '{{ www_user }} ALL=NOPASSWD: /usr/sbin/service php{{ php_version }}-fpm reload'
+    validate: 'visudo -cf %s'