First draft for a prosody role

roles/prosody/defaults/main.yml

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+---
+prosody_domain: "jabber.ccchb.de"
+prosody_ssl_cert: "/etc/letsencrypt/live/{{ prosody_domain }}/fullchain.pem"
+prosody_ssl_key: "/etc/letsencrypt/live/{{ prosody_domain }}/privkey.pem"
+prosody_allow_registration: false
+prosody_modules:
+  - roster
+  - saslauth
+  - tls
+  - dialback
+  - disco
+  - private
+  - bookmarks
+  - vcard
+  - proxy65
+  - legacyauth
+  - version
+  - uptime
+  - time
+  - ping
+  - pep
+  - register
+  - adhoc
+  - admin_adhoc
+  - posix
+  - bosh
+  - websocket
+  - groups
+  - announce
+  - watchregistrations
+  - blocking
+  - smacks
+  - carbons
+  - cloud_notify
+  - csi
+  - mam
+  - filter_chatstates
+  - throttle_presence
+  - http_upload
+  - turncredentials
+  - vcard_legacy
+
+prosody_nginx_install: true
+prosody_nginx_conf: |
+  listen [::]:443 ssl http2;
+  listen 443 ssl http2;
+
+  server_name {{ prosody_domain }};
+
+  root /var/www/html;
+
+  ssl_certificate {{ prosody_ssl_cert }};
+  ssl_certificate_key {{ prosody_ssl_key }};
+  ssl_trusted_certificate /etc/letsencrypt/live/{{ prosody_domain }}/chain.pem;
+
+  include snippets/certbot.conf;
+...

roles/prosody/handlers/main.yml

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+---
+- name: reload nginx
+  systemd:
+    name: nginx
+    state: reloaded

roles/prosody/tasks/main.yml

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+---
+- name: Install prosody http site
+  template:
+    src: nginx.j2
+    dest: "/etc/nginx/sites-available/{{ prosody_domain }}"
+  when: prosody_nginx_install
+
+- name: Enable prosody http site
+  notify: reload nginx
+  file:
+    src: /etc/nginx/sites-available/{{ prosody_domain }}
+    dest: /etc/nginx/sites-enabled/{{ prosody_domain }}
+    state: link
+  when: prosody_nginx_install
+
+- name: Configure prosody
+  template:
+    src: prosody.cfg.lua.j2
+    dest: /etc/prosody/prosody_test.cfg.lua
+
+...

roles/prosody/templates/nginx.j2

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+# {{ ansible_managed }}
+
+server {
+	{{ prosody_nginx_conf }}
+
+	location /http-bind {
+		proxy_pass http://127.0.0.1:5280/http-bind;
+	}
+
+	location /xmpp-websocket {
+		proxy_pass http://127.0.0.1:5280/xmpp-websocket;
+	}
+
+	location /upload {
+		proxy_set_header Host {{ prosody_domain }};
+		proxy_pass http://127.0.0.1:5280/upload;
+	}
+}

roles/prosody/templates/prosody.cfg.lua.j2

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+-- Prosody XMPP Server Configuration
+-- {{ ansible_managed }}
+
+---------- Server-wide settings ----------
+-- Settings in this section apply to the whole server and are the default settings
+-- for any virtual hosts
+
+-- This is a (by default, empty) list of accounts that are admins
+-- for the server. Note that you must create the accounts separately
+-- (see http://prosody.im/doc/creating_accounts for info)
+-- Example: admins = { "user1@example.com", "user2@example.net" }
+admins = { "deelkar@jabber.ccchb.de", "freak@jabber.ccchb.de", "jali@jabber.ccchb.de" }
+
+-- Enable use of libevent for better performance under high load
+-- For more information see: http://prosody.im/doc/libevent
+use_libevent = false;
+
+plugin_paths = { "/opt/prosody-modules" }
+
+-- This is the list of modules Prosody will load on startup.
+-- It looks for mod_modulename.lua in the plugins folder, so make sure that exists too.
+-- Documentation on modules can be found at: http://prosody.im/doc/modules
+modules_enabled = {
+	{% for module in prosody_modules %}
+	"{{ module }}";
+	{% endfor %}
+};
+
+-- These modules are auto-loaded, should you
+-- (for some mad reason) want to disable
+-- them then uncomment them below
+modules_disabled = {
+	-- "presence"; -- Route user/contact status information
+	-- "message"; -- Route messages
+	-- "iq"; -- Route info queries
+	-- "offline"; -- Store offline messages
+};
+
+-- Disable account creation by default, for security
+-- For more information see http://prosody.im/doc/creating_accounts
+allow_registration = {{ prosody_allow_registration }};
+
+-- These are the SSL/TLS-related settings. If you don't want
+-- to use SSL/TLS, you may comment or remove this
+-- *** DUMMY CERT *** DO NOT CHANGE *** SET CERT IN HOST SECTION ***
+ssl = {
+	protocol = "sslv23";
+	key = "{{ prosody_ssl_key }}";
+	certificate = "{{ prosody_ssl_cert }}";
+	dhparam = "/etc/prosody/certs/dh-2048.pem";
+	options = { "no_sslv2", "no_sslv3", "no_ticket", "no_compression", "cipher_server_preference", "single_dh_use", "single_ecdh_use" };
+        ciphers = "ECDH:DH:HIGH+kEDH:HIGH+kEECDH:HIGH:!CAMELLIA128:!3DES:!MD5:!RC4:!aNULL:!NULL:!EXPORT:!LOW:!MEDIUM";
+}
+legacy_ssl_ports = { 5223 }
+http_external_url = "https://{{ prosody_domain }}/"
+
+-- Only allow encrypted streams? Encryption is already used when
+-- available. These options will cause Prosody to deny connections that
+-- are not encrypted. Note that some servers do not support s2s
+-- encryption or have it disabled, including gmail.com and Google Apps
+-- domains.
+
+--c2s_require_encryption = false
+--s2s_require_encryption = false
+
+-- Select the authentication backend to use. The 'internal' providers
+-- use Prosody's configured data storage to store the authentication data.
+-- To allow Prosody to offer secure authentication mechanisms to clients, the
+-- default provider stores passwords in plaintext. If you do not trust your
+-- server please see http://prosody.im/doc/modules/mod_auth_internal_hashed
+-- for information about using the hashed backend.
+
+authentication = "internal_hashed"
+
+-- Select the storage backend to use. By default Prosody uses flat files
+-- in its configured data directory, but it also supports more backends
+-- through modules. An "sql" backend is included by default, but requires
+-- additional dependencies. See http://prosody.im/doc/storage for more info.
+
+--storage = "sql" -- Default is "internal"
+
+-- For the "sql" backend, you can uncomment *one* of the below to configure:
+--sql = { driver = "SQLite3", database = "prosody.sqlite" } -- Default. 'database' is the filename.
+--sql = { driver = "MySQL", database = "prosody", username = "prosody", password = "secret", host = "localhost" }
+--sql = { driver = "PostgreSQL", database = "prosody", username = "prosody", password = "secret", host = "localhost" }
+
+
+-- STUN/TURN
+--turncredentials_host = "jabber.emma.ccchb.de"
+turncredentials_host = "einstein.cskreie.de"
+turncredentials_secret = "gabbagabbahey"
+
+
+-- HTTP-UPLOAD
+http_upload_file_size_limit = 10485760 -- 10M
+http_max_content_size = 20971520 -- 20M
+http_upload_quota =  104857600 -- 100M
+http_upload_expire_after = 2592000 -- 30d
+
+-- Logging configuration
+-- For advanced logging see http://prosody.im/doc/logging
+-- Hint: If you create a new log file or rename them, don't forget 
+-- to update the logrotate config at /etc/logrotate.d/prosody
+log = {
+        -- Log all error messages to prosody.err
+	error = "/var/log/prosody/prosody.err";
+        -- Log everything of level "info" and higher (that is, all except "debug" messages)
+        -- to prosody.log
+        -- info = "/var/log/prosody/prosody.log"; -- Change 'info' to 'debug' for more verbose logging
+        -- debug = "/var/log/prosody/prosody.log"; -- Change 'info' to 'debug' for more verbose logging
+        --"*syslog"; -- Uncomment this for logging to syslog
+}
+
+-- Pidfile, used by prosodyctl and the init.d script
+pidfile = "/var/run/prosody/prosody.pid";
+
+----------- Virtual hosts -----------
+-- You need to add a VirtualHost entry for each domain you wish Prosody to serve.
+-- Settings under each VirtualHost entry apply *only* to that host.
+
+VirtualHost "localhost"
+
+VirtualHost "{{ prosody_domain }}"
+	enabled = true -- Remove this line to enable this host
+
+	-- Assign this host a certificate for TLS, otherwise it would use the one
+	-- set in the global section (if any).
+	-- Note that old-style SSL on port 5223 only supports one certificate, and will always
+	-- use the global one.
+	ssl = {
+		protocol = "sslv23";
+		key = "{{ prosody_ssl_key }}";
+		certificate = "{{ prosody_ssl_cert }}";
+	       dhparam = "/etc/prosody/certs/dh-2048.pem";
+	       options = { "no_sslv2", "no_sslv3", "no_ticket", "no_compression", "cipher_server_preference", "single_dh_use", "single_ecdh_use" };
+        	ciphers = "ECDH:DH:HIGH+kEDH:HIGH+kEECDH:HIGH:!CAMELLIA128:!3DES:!MD5:!RC4:!aNULL:!NULL:!EXPORT:!LOW:!MEDIUM";
+	}
+
+------ Components ------
+-- You can specify components to add hosts that provide special services,
+-- like multi-user conferences, and transports.
+-- For more information on components, see http://prosody.im/doc/components
+
+---Set up a MUC (multi-user chat) room server on conference.example.com:
+Component "muc.{{ prosody_domain }}" "muc"
+modules_enabled = {
+  "vcard_muc", "muc_mam",
+}
+-- Set up a SOCKS5 bytestream proxy for server-proxied file transfers:
+--Component "proxy.example.com" "proxy65"
+
+---Set up an external component (default component port is 5347)
+--
+-- External components allow adding various services, such as gateways/
+-- transports to other networks like ICQ, MSN and Yahoo. For more info
+-- see: http://prosody.im/doc/components#adding_an_external_component
+--
+--Component "gateway.example.com"
+--	component_secret = "password"
+