roles: Add sshd role for configuration generation

3 files changed, 109 insertions, 0 deletions

diff --git a/roles/sshd/tasks/main.yml b/roles/sshd/tasks/main.yml
new file mode 100644
index 0000000..f9131e9
--- /dev/null
+++ b/roles/sshd/tasks/main.yml
@@ -0,0 +1,19 @@
+- name: generate sshd configuration
+  template:
+    src: sshd_config.j2
+    dest: /etc/ssh/sshd_config
+    owner: 0
+    group: 0
+    mode: 0644
+
+- name: enabled and restart sshd
+  service:
+    name: sshd
+    state: restarted
+    enabled: true
+
+- name: check ssh connection
+  wait_for:
+    port: 22
+    delay: 1
+    state: started
diff --git a/roles/sshd/tasks/sync_keys.yml b/roles/sshd/tasks/sync_keys.yml
new file mode 100644
index 0000000..73aa741
--- /dev/null
+++ b/roles/sshd/tasks/sync_keys.yml
@@ -0,0 +1,68 @@
+- name: retrieve all existing users
+  shell: cut -d ":" -f 1 /etc/passwd
+  register: sshd_users
+  changed_when: false
+
+- name: bind retrieved users output lines to list
+  set_fact:
+    sshd_users: "{{ sshd_users.stdout_lines }}"
+
+- name: get ssh keys for all user
+  find:
+    paths: "{{ inventory_dir }}/files/pubkeys"
+    pattern: "*.pub"
+    recurse: true
+    file_type: link
+  register: keys
+  delegate_to: localhost
+
+- name: show pubkeys
+  debug:
+    msg: |
+      {% for key in keys.files %}
+      {{ key.path }}
+      {% endfor %}
+  run_once: true
+  delegate_to: localhost
+
+- name: synchronize ssh keys
+  authorized_key:
+    user: "{{ item.path | dirname | basename }}"
+    state: present
+    key: "{{ lookup('file', item.path) }}"
+  when: item.path | dirname | basename in sshd_users
+  loop: "{{ keys.files }}"
+  loop_control:
+    label: "{{ item.path }}"
+
+- name: get users homedir
+  shell: echo $(getent passwd "{{ item.path | dirname | basename }}" | cut -d ":" -f 6) "{{ item.path | dirname | basename }}"
+  register: sshd_homedirs
+  when: item.path | dirname | basename in sshd_users
+  loop: "{{ keys.files }}"
+  changed_when: false
+  loop_control:
+    label: "{{ item.path | dirname | basename }}"
+
+- name: clean users homedir result
+  set_fact:
+    sshd_homedirs: "[{% for dir in sshd_homedirs.results if dir.stdout is defined %}\"{{ dir.stdout }}\", {% endfor %}]"
+
+- name: make users homedir unique
+  set_fact:
+    sshd_homedirs: "{{ sshd_homedirs | unique }}"
+
+- name: show sshd homedirs for users
+  debug:
+    var: sshd_homedirs
+
+- name: chown ssh file to correct user
+  file:
+    path: "{{ item.split(' ')[0] }}/.ssh/authorized_keys"
+    owner: "{{ item.split(' ')[1] }}"
+    mode: "0600"
+  ignore_errors: true
+  when: item.split(" ")[1] in sshd_users
+  loop: "{{ sshd_homedirs }}"
+  loop_control:
+    label: "{{ item }}"
diff --git a/roles/sshd/templates/sshd_config.j2 b/roles/sshd/templates/sshd_config.j2
new file mode 100644
index 0000000..534ea39
--- /dev/null
+++ b/roles/sshd/templates/sshd_config.j2
@@ -0,0 +1,22 @@
+# managed by Ansible
+
+# security
+PermitRootLogin yes
+MaxAuthTries 6
+MaxSessions 10
+
+# auth
+AuthorizedKeysFile .ssh/authorized_keys
+PasswordAuthentication no
+PermitEmptyPasswords no
+ClientAliveInterval 180
+
+{% if ansible_facts["os_family"] == "Debian" %}
+Subsystem sftp /usr/lib/openssh/sftp-server
+ChallengeResponseAuthentication no
+UsePAM yes
+PrintMotd no
+UsePrivilegeSeparation sandbox
+{% else %}
+Subsystem sftp /usr/libexec/sftp-server
+{% endif %}