Add autossh role

roles/autossh/defaults/main.yaml

@@ -0,0 +1,17 @@
+---
+autossh_package_name: autossh
+autossh_package_state: present
+
+autossh_service_name: autossh@.service
+autossh_systemd_unit_path: /etc/systemd/system/autossh@.service
+
+autossh_etc_path: /etc/autossh
+autossh_run_path: /run/autossh
+
+autossh_user: autossh
+autossh_group: autossh
+autossh_user_state: present
+autossh_user_comment: AutoSSH
+autossh_user_home: "/home/{{ autossh_user }}"
+autossh_user_password: "!"
+autossh_user_shell: /usr/sbin/nologin

roles/autossh/handlers/main.yaml

@@ -0,0 +1,20 @@
+---
+- name: autossh daemon-reload
+  systemd:
+    daemon_reload: yes
+
+- name: reload autossh
+  service:
+    name: "{{ autossh_service_name }}"
+    state: reloaded
+
+- name: restart autossh
+  service:
+    name: "{{ autossh_service_name }}"
+    state: restarted
+
+- name: reload autossh instances
+  service:
+    name: "autossh@{{ item.name }}.service"
+    state: restarted
+  loop: "{{ autossh_config | default([]) }}"

roles/autossh/tasks/keys.yaml

@@ -0,0 +1,28 @@
+---
+- set_fact:
+    key_path: "{{ autossh_user_home }}/.ssh/{{ item }}"
+    
+- name: "install private key ({{ item }})"
+  copy:
+    dest: "{{ autossh_user_home }}/.ssh/{{ item }}"
+    content: "{{ lookup('vars', 'autossh_private_key_' + item) }}"
+    owner: "{{ autossh_user }}"
+    group: "{{ autossh_group }}"
+    mode: 0600
+  when: lookup('vars', 'autossh_private_key_' + item, default='') | length
+
+- name: "determine if private key exists ({{ item }})"
+  stat:
+    path: "{{ key_path }}"
+  register: priv_key
+
+- name: "determine if public key exists ({{ item }}.pub)"
+  stat:
+    path: "{{ key_path }}.pub"
+  register: pub_key
+
+- name: "derive public key ({{ item }})"
+  shell: "ssh-keygen -y -f {{ key_path }} > {{ key_path }}.pub"
+  when:
+    - not pub_key.stat.exists
+    - priv_key.stat.exists

roles/autossh/tasks/main.yaml

@@ -0,0 +1,80 @@
+---
+- name: "create {{ autossh_user }} user"
+  user:
+    name: "{{ autossh_user }}"
+    comment: "{{ autossh_user_comment }}"
+    password: "{{ autossh_user_password }}"
+    #password_lock: yes
+    shell: "{{ autossh_user_shell }}"
+    generate_ssh_key: yes
+    state: "{{ autossh_user_state }}"
+    system: yes
+    skeleton: /dev/null
+
+- name: "manage keys {{ item }}"
+  include: keys.yaml
+  loop:
+    - id_dsa
+    - id_ecdsa
+    - id_ed25519
+    - id_rsa
+
+- name: create directories
+  file:
+    path: "{{ item }}"
+    owner: root
+    group: root
+    mode: 0755
+    state: directory
+  loop:
+    - "{{ autossh_etc_path }}"
+    - "{{ autossh_run_path }}"
+
+- name: install package
+  package:
+    name: "{{ autossh_package_name }}"
+    state: "{{ autossh_package_state }}"
+- name: manage keys "{{ item }}"
+  include: keys.yaml
+  loop:
+    - id_dsa
+    - id_ecdsa
+    - id_ed25519
+    - id_rsa
+
+- name: manage authorized keys
+  authorized_key:
+    user: "{{ autossh_user }}"
+    key: "{{ item.key }}"
+    comment: "{{ item.comment | default(omit) }}"
+    state: "{{ item.state | default('present') }}"
+  loop: "{{ autossh_authorized_keys | default([]) }}"
+
+- name: configure systemd unit
+  template:
+    src: autossh.service.j2
+    dest: "{{ autossh_systemd_unit_path }}"
+    owner: root
+    group: root
+    mode: 0644
+  notify:
+    - reload autossh instances
+    - autossh daemon-reload
+  when: ansible_service_mgr == 'systemd'
+
+- name: configure autossh tunnels
+  template:
+    src: autossh.j2
+    dest: "{{ autossh_etc_path }}/{{ item.name }}"
+    owner: root
+    group: root
+    mode: 0644
+  loop: "{{ autossh_config | default([]) }}"
+  notify: reload autossh instances
+
+- name: manage services
+  service:
+    name: "autossh@{{ item.name }}.service"
+    state: "{{ item.state | default('started') }}"
+    enabled: "{{ item.enabled | default(true) }}"
+  loop: "{{ autossh_config | default([]) }}"

roles/autossh/templates/autossh.j2

@@ -0,0 +1,8 @@
+# {{ ansible_managed }}
+
+AUTOSSH_POLL=60
+AUTOSSH_FIRST_POLL=30
+AUTOSSH_GATETIME=0
+AUTOSSH_PORT=22000
+SSH_OPTIONS="{{ item.options | join(' ') }}"
+SSH_HOST={{ item.host }}

roles/autossh/templates/autossh.service.j2

@@ -0,0 +1,19 @@
+# {{ ansible_managed }}
+
+[Unit]
+Description=autossh %I
+Wants=network-online.target
+After=network-online.target
+
+[Service]
+Type=simple
+User={{ autossh_user }}
+EnvironmentFile={{ autossh_etc_path }}/%i
+ExecStart=
+ExecStart=/usr/bin/autossh -C -q -l {{ autossh_user }} -N -o ExitOnForwardFailure=yes -o ServerAliveInterval=15 -o ServerAliveCountMax=3 -o StrictHostKeyChecking=no $SSH_OPTIONS $SSH_HOST
+Restart=always
+RestartSec=60
+PIDFile={{ autossh_run_path }}/%i.pid
+
+[Install]
+WantedBy=multi-user.target