aria2: Deploy aria2 download manager

The *aria2* role installs the *aria2* download manager and sets it up to
run as a system service with RPC enabled. It also sets up the web UI,
though that must be installed manually from an archive, for now.

aria2.yml

@@ -0,0 +1,9 @@
+- hosts: aria2
+  roles:
+  - apache
+  - aria2
+  tasks:
+  - name: ensure apache is running
+    service:
+      name=httpd
+      state=started

group_vars/aria2.yml

@@ -0,0 +1,2 @@
+aria2_download_dir: /srv/cifs/Downloads/00aria2
+aria2_webui_host: files.pyrocufflink.blue

hosts

@@ -4,6 +4,9 @@ ansible_python_interpreter=/usr/bin/python3
 [ansible]
 cm0.pyrocufflink.blue
 
+[aria2]
+file0.pyrocufflink.blue
+
 [burp-client]
 file0.pyrocufflink.blue
 

roles/aria2/defaults/main.yml

@@ -0,0 +1,4 @@
+aria2_download_dir: /var/lib/aria2/downloads
+aria2_listen_ports: 16881-16999
+aria2_dht_listen_ports: 6881-6999
+aria2_webui_host: '{{ ansible_fqdn }}'

roles/aria2/files/aria2.httpd.conf

@@ -0,0 +1,5 @@
+Alias /aria2 /var/lib/aria2/webui
+
+<Location /aria2>
+	Require all granted
+</Location>

roles/aria2/files/aria2.service

@@ -0,0 +1,11 @@
+[Unit]
+Description=aria2 Download Manager
+
+[Service]
+Type=simple
+User=aria2
+Group=aria2
+ExecStart=/usr/bin/aria2c --daemon=false --conf-path=/etc/aria2.conf --log=-
+
+[Install]
+WantedBy=multi-user.target

roles/aria2/handlers/main.yml

@@ -0,0 +1,12 @@
+- name: reload systemd
+  command: systemctl daemon-reload
+- name: restart aria2
+  service:
+    name=aria2
+    state=restarted
+- name: reload httpd
+  service:
+    name=httpd
+    state=reloaded
+- name: save firewalld configuration
+  command: firewalld --runtime-to-permanent

roles/aria2/tasks/main.yml

@@ -0,0 +1,88 @@
+- name: ensure aria2 is installed
+  package:
+    name=aria2
+    state=present
+  tags:
+  - install
+
+- name: ensure aria2 group exists
+  group:
+    name=aria2
+    system=yes
+    state=present
+  tags:
+  - group
+  - user
+- name: ensure aria2 user exists
+  user:
+    name: aria2
+    group: aria2
+    comment: aria2 Download Manager
+    home: /var/lib/aria2
+    createhome: true
+    shell: /sbin/nologin
+    system: true
+    state: present
+
+- name: ensure aria2 is configured
+  template:
+    src=aria2.conf.j2
+    dest=/etc/aria2.conf
+    mode=0644
+  notify: restart aria2
+
+- name: ensure aria2 download directory exists
+  file:
+    path={{ aria2_download_dir }}
+    owner=aria2
+    group=aria2
+    mode=755
+    state=directory
+
+- name: ensure aria2 state file exists
+  copy:
+    dest=/var/lib/aria2/aria2.state
+    content=
+    force=no
+
+- name: ensure aria2 systemd unit exists
+  copy:
+    src=aria2.service
+    dest=/etc/systemd/system/aria2.service
+    mode=0644
+  notify: reload systemd
+
+- name: ensure firewall is configured for aria2
+  firewalld:
+    port: '{{ item }}'
+    permanent: false
+    immediate: true
+    state: enabled
+  with_items:
+  - 6800/tcp
+  - '{{ aria2_listen_ports }}/tcp'
+  - '{{ aria2_dht_listen_ports }}/tcp'
+  notify: save firewalld configuration
+
+- name: ensure aria2 service starts at boot
+  service:
+    name=aria2
+    enabled=yes
+- meta: flush_handlers
+- name: ensure aria2 service is running
+  service:
+    name=aria2
+    state=started
+
+- name: ensure aria2 web ui is configured
+  template: 
+    src=configuration.js.j2
+    dest=/var/lib/aria2/webui/configuration.js
+    mode=0644
+
+- name: ensure apache is configured to serve aria2 web ui
+  copy:
+    src=aria2.httpd.conf
+    dest=/etc/httpd/conf.d/aria2.conf
+    mode=0644
+  notify: reload httpd

roles/aria2/templates/aria2.conf.j2

@@ -0,0 +1,17 @@
+dir={{ aria2_download_dir }}
+bt-exclude-tracker=*
+bt-prioritize-piece=head,tail
+bt-require-crypto=true
+dht-listen-port={{ aria2_dht_listen_ports }}
+dht-entry-point=dht.transmissionbt.com:6881
+dht-file-path=/var/lib/aria2/dht.dat
+dht-file-path6=/var/lib/aria2/dht6.dat
+listen-port={{ aria2_listen_ports }}
+enable-rpc=true
+rpc-listen-all=true
+log=/var/log/aria2.log
+log-level=notice
+continue
+save-session=/var/lib/aria2/aria2.state
+input-file=/var/lib/aria2/aria2.state
+save-session-interval=10

roles/aria2/templates/configuration.js.j2

@@ -0,0 +1,46 @@
+angular
+.module('webui.services.configuration',  [])
+.constant('$name', 'Aria2 WebUI')  // name used across the entire UI
+.constant('$titlePattern', 'active: {active} - waiting: {waiting} - stopped: {stopped} — {name}')
+.constant('$pageSize', 11)         // number of downloads shown before pagination kicks in
+.constant('$authconf', {           // default authentication configuration, never fill it in case the webui is hosted in public IP as it can be compromised
+  host: location.protocol.startsWith('http') ? location.hostname : 'localhost',
+  path: '/jsonrpc',
+  port: 6800,
+  encrypt: false,
+  auth: {                          // either add the token field or the user and pass field, not both.
+  // token: '$YOUR_SECRET_TOKEN$'
+  /*-----------------------------*/
+  // user: '*YOUR_USERNAME*',
+  // pass: '*YOUR_SECRET_PASS*'
+  },
+  directURL: ''                   // If supplied, links will be created to enable direct download from the aria2 server, requires appropriate webserver to be configured
+})
+.constant('$enable', {
+
+  torrent: true,  // bittorrent support only enabled if supported by aria2 build, set to false otherwise to permanently disable it
+
+  metalink: true, // metalink support only enabled if supported by aria2 build, set to false to permanently disable it
+
+  sidebar: {            // configuration related to the sidebar next to the list of downloads
+    show: true,         // set to false to completely hide the sidebar. Other elements inside will be automatically hidden
+
+    stats: true,        // set to false to hide the global statistic section (contains the speed graph for now)
+
+    filters: true,      // set to false to hide the  Download Filters
+
+    starredProps: true // only shown when at least one property is added to the starred list, set to false to permanently hide the Quick Access Settings inside the sidebar
+  }
+})
+.constant('$starredProps', [   // default list of Quick Access Properties. Can be overridden by making modification through the Global Settings dialog
+  // go to Global Settings dialog to see their description
+  'dir', 'conf-path', 'auto-file-renaming', 'max-connection-per-server'
+])
+.constant('$downloadProps', [ // Similar to starred Quick Access properties but for adding new downloads.
+  // go to Advance Download Options when adding a new download to view the list of possible options
+  'header', 'http-user', 'http-passwd', 'pause', 'dir', 'max-connection-per-server'
+])
+.constant('$globalTimeout', 1000)  // interval to update the individual downloads
+;
+
+