Ansible Role - Nginx Webserver

Ansible Role to deploy one or multiple NGINX sites on a linux server.

Molecule Logs: Short, Full

Tested:

• Debian 11
• Debian 12

---

Install

# latest
ansible-galaxy role install git+https://github.com/ansibleguy/infra_nginx

# from galaxy
ansible-galaxy install ansibleguy.infra_nginx

# or to custom role-path
ansible-galaxy install ansibleguy.infra_nginx --roles-path ./roles

# install dependencies
ansible-galaxy install -r requirements.yml

# if you want to use basic-auth: install python dependencies
python3 -m pip install -r requirements.txt

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---

Usage

Config

Define the nginx dictionary as needed!

nginx:
  config:
    client_max_body_size: '500m'
    ssl_session_timeout: '15m'
  
  sites:
    some_proxy:
      mode: 'proxy'
      domain: 'some.guy.net'
      aliases:
        - 'service.guy.net'

      port_ssl: 8443
      port_plain: 8080
      proxy:  # default proxy-target is localhost
        port: 50000  # target port
        
        cache:  # upstream content-caching
          enable: true

      ssl:
        mode: 'existing'  # pre-existing certificates to be copied to the target server

      security:
        # very basic filtering of bad bots based on user-agent matching
        block_script_bots: true
        block_bad_crawler_bots: true

    guys_statics:
      mode: 'server'
      domain: 'static.guy.net'
      serve:
        path: '/var/www/static'

      ssl:
        mode: 'snakeoil'
      
      config:  # add settings as key-value pairs
        LimitRequestFields: 10
      config_additions:  # add a list of custom lines of config
        - 'location = /favicon.ico {alias /var/not_www/site_guys_statics/favicon.ico;}'

    git_stuff:
      mode: 'redirect'
      redirect:
        target: 'https://github.com/ansibleguy'

      ssl:
        mode: 'letsencrypt'
      letsencrypt:
        email: 'nginx@template.ansibleguy.net'

      security:
        restrict_methods: false

    fileshare:
      mode: 'server'
      domain: 'files.guy.net'
      serve:
        path: '/var/www/files'

      basic_auth:
        enable: true
        provider: 'file'
        file:
          users:
            some_user: 'some_password'

Execution

Run the playbook:

ansible-playbook -K -D -i inventory/hosts.yml playbook.yml

To only process a specific site: (and safe time)

ansible-playbook -K -D -i inventory/hosts.yml playbook.yml -e only_site=SITE_NAME
# note: multiple comma-separated sites should also work

There are also some useful tags available:

• base => only configure basics; sites will not be touched
• sites
• config => only update site config (excluding certificates)
• certs
• letsencrypt
• auth
• only_certs (can be used as skip-tag)

To debug errors - you can set the 'debug' variable at runtime:

ansible-playbook -K -D -i inventory/hosts.yml playbook.yml -e debug=yes

---

Functionality

• Package installation

  • Ansible dependencies (minimal)
  • Nginx

• Configuration

  • Support for multiple sites/servers

  • Three config-modes:

    • proxy (default)
    • serve
    • redirect

  • Support for specific configurations using the 'config' and 'config_additions' parameters

  • Option to filter 'locations' by GeoIP => COMING SOON (:

  • Default config:

    • Disabled: <TLS1.2, unsecure ciphers, autoindex, servertokens
    • Security headers: HSTS, X-Frame, Referrer-Policy, Content-Type nosniff, X-Domain-Policy, XXS-Protection
    • Limits to prevent DDoS
    • Using a Self-Signed certificate
    • HTTP2 enabled with fallback to HTTP1.1
    • IPv6 support enabled

  • SSL modes (for more info see: CERT ROLE)

    • selfsigned => Generate self-signed ones
    • ca => Generate a minimal Certificate Authority and certificate signed by it
    • letsencrypt => Uses the LetsEncrypt certbot
    • existing => Copy certificate files or use existing ones

  • Default opt-ins:

    • restricting methods to POST/GET/HEAD
    • status-page listener on localhost
    • Logging to syslog
    • http2

  • Default opt-outs:

    • proxy-mode caching
    • Blocking of Known Script-Bots
    • Blocking of known Bad-Crawler-Bots

Info

• Note: this role currently only supports debian-based systems

• Note: Most of the role's functionality can be opted in or out.

  For all available options - see the default-config located in the main/site defaults-file!

• Info: Many variables can be set either on 'global' or 'per-site' scope.

  Site config is always overruling the global one.

• Note: This role expects that the site's unencrypted 'server' will only redirect to its encrypted connection.

• Note: If you want all domain-names to get 'caught' by a site/server you need to add an underline '_' as alias or domain!
  This will also be done automatically if no domain is supplied.

• Warning: Not every setting/variable you provide will be checked for validity. Bad config might break the role!

• Info: To disable default settings and headers => just set their value to: '' (empty string)

• Info: If you are filtering web-requests via GeoIP filter using your firewall => LetsEncrypt will work with only opening port 80 to the world.

  Requests other than '.well-known/acme-challenge/' are just redirected to 443.

• Info: For LetsEncrypt renewal to work, you must allow outgoing connections to:

  80/tcp, 443/tcp+udp to acme-v02.api.letsencrypt.org, staging-v02.api.letsencrypt.org (debug mode) and r3.o.lencr.org

• Info: This role also supports configuring basic-auth.

  For advanced use-cases you might want to set auth_request in site.config_additions_root that can be used to implement OAuth-Proxies and so on.

• Info: You can set the plain_only flag to disable HTTPS. This might be nice-to-have if you are behind another proxy server.