Update to 2021-12-01 19:13

roles/transmission_daemon/defaults/main.yml

@@ -0,0 +1,11 @@
+---
+
+transmission_user: transmission
+transmission_data_dir: /var/lib/transmission
+transmission_rpc_listen_ip: 0.0.0.0
+transmission_rpc_src_ip: []
+transmission_rpc_port: 9091
+transmission_port: 51413
+transmission_src_ip:
+  - 0.0.0.0/0
+

roles/transmission_daemon/handlers/main.yml

@@ -0,0 +1,4 @@
+---
+
+- name: restart transmission
+  service: name=transmission-daemon state=restarted

roles/transmission_daemon/tasks/main.yml

@@ -0,0 +1,56 @@
+---
+
+- name: Install transmission daemon
+  yum: name=transmission-daemon state=present
+  tags: torrent
+
+- name: Create user
+  user: name={{ transmission_user }} comment="Transmission Daemon" system=yes shell=/sbin/nologin
+  tags: torrent
+
+- name: Create directories
+  file: path={{ transmission_data_dir }}/{{ item }} state=directory owner={{ transmission_user }}
+  with_items:
+    - finished
+    - incomplete
+    - watch
+  failed_when: False # can fail if a fuse based FS is mounted here
+  tags: torrent
+
+- name: Deploy default config
+  template: src=sysconfig.j2 dest=/etc/sysconfig/transmission
+  notify: restart transmission
+  tags: torrent
+
+- name: Override default systemd unit
+  template: src=transmission-daemon.service.j2 dest=/etc/systemd/system/transmission-daemon.service
+  register: transmission_unit
+  notify: restart transmission
+  tags: torrent
+
+- name: Handle transmission port
+  iptables_raw:
+    name: transmission_port
+    state: "{{ (transmission_src_ip | length > 0) | ternary('present','absent') }}"
+    rules: |
+      -A INPUT -m state --state NEW -p tcp --dport {{ transmission_port }} -s {{ transmission_src_ip | join(',') }} -j ACCEPT
+      -A INPUT -p udp --dport {{ transmission_port }} -s {{ transmission_src_ip | join(',') }} -j ACCEPT
+  when: iptables_manage | default(True)
+  tags: torrent,firewall
+
+- name: Handle transmission RPC port
+  iptables_raw:
+    name=transmission_rpc_port
+    state={{ (transmission_rpc_src_ip | length > 0) | ternary('present','absent') }}
+    rules="-A INPUT -m state --state NEW -p tcp --dport {{ transmission_rpc_port }} -s {{ transmission_rpc_src_ip | join(',') }} -j ACCEPT"
+  when: iptables_manage | default(True)
+  tags: torrent,firewall
+
+- name: Reload systemd
+  command: systemctl daemon-reload
+  when: transmission_unit.changed
+  tags: torrent
+
+- name: Start and enable the service
+  service: name=transmission-daemon state=started enabled=yes
+  tags: torrent

roles/transmission_daemon/templates/sysconfig.j2

@@ -0,0 +1 @@
+TRANSMISSION_OPTS="--encryption-preferred --foreground -c {{ transmission_data_dir }}/watch --rpc-bind-address {{ transmission_rpc_listen_ip }} --port {{ transmission_rpc_port }} --no-auth --download-dir {{ transmission_data_dir }}/finished --incomplete-dir {{ transmission_data_dir }}/incomplete --log-error"

roles/transmission_daemon/templates/transmission-daemon.service.j2

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+[Unit]
+Description = Transmission BitTorrent Daemon
+After = network.target
+
+[Service]
+Type=notify
+EnvironmentFile = /etc/sysconfig/transmission
+ExecStart = /bin/transmission-daemon $TRANSMISSION_OPTS
+ExecReload = /bin/kill -s HUP $MAINPID
+User = {{ transmission_user }}
+Group = {{ transmission_user }}
+Restart = on-failure
+IOSchedulingClass = best-effort
+IOSchedulingPriority = 7
+Nice = 10
+CPUSchedulingPolicy = idle
+
+[Install]
+WantedBy = multi-user.target
+