Refactor roles to support new variable schema

Add common-env and docker roles

roles/sshd/defaults/main.yml

@@ -1,2 +1,3 @@
 ---
 omni_restart_services: false
+omni_ssh_enabled: true

roles/sshd/tasks/install.yml

@@ -0,0 +1,14 @@
+---
+- name: Install OpenSSH server on Fedora and CentOS 8
+  when: ansible_distribution == "Fedora" or (ansible_distribution == "CentOS" and ansible_distribution_major_version == "8")
+  become: true
+  dnf:
+    name: openssh-server
+    state: latest
+
+- name: Install OpenSSH server on CentOS 7
+  when: ansible_distribution == "CentOS" and ansible_distribution_major_version == "7"
+  become: true
+  yum:
+    name: openssh-server
+    state: latest

roles/sshd/tasks/main.yml

@@ -1,4 +1,6 @@
 ---
+- import_tasks: install.yml
+
 - name: Install SSH Banner
   become: true
   template:
@@ -26,8 +28,8 @@
       set: "ChallengeResponseAuthentication no"
 
 - name: Restart sshd service
-  when: omni_restart_services == true
   become: true
   systemd:
     name: sshd
-    state: restarted
+    state: "{{ 'restarted' if omni_restart_services == true else 'started' }}"
+    enabled: "{{ omni_ssh_enabled }}"