add sshd management

docs/services/system.md

@@ -35,3 +35,32 @@ To avoid these calculations and set your own size explicitly, set the `system_sw
 ```yaml
 system_swap_size: 4096
 ```
+
+### ssh
+
+> **Warning**: advanced functionality! While the default config with a few adjustments was battle tested on hundreds of servers,
+> you should use it with caution and verify everything before you apply the changes!
+
+To enable [ssh server](https://www.openssh.com/) config and authorized/unauthorized keys management, add the following configuration to your `vars.yml` file and re-run the [installation](../installing.md) process:
+
+```yaml
+########################################################################
+#                                                                      #
+# system                                                               #
+#                                                                      #
+########################################################################
+
+system_security_ssh_enabled: true
+system_security_ssh_authorizedkeys: [] # list of authorized public keys
+system_security_ssh_unauthorizedkeys: [] # list of unauthorized/revoked public keys
+
+########################################################################
+#                                                                      #
+# /system                                                              #
+#                                                                      #
+########################################################################
+```
+
+[Default configuration](https://gitlab.com/etke.cc/roles/ssh/-/blob/main/defaults/main.yml) is good enough as-is, but we strongly suggest you to **verify everything before applying any changes!**, otherwise you may lock yourself out.
+
+There are various of different configuration options - check the defaults and adjust them to your needs.

requirements.yml

@@ -6,6 +6,9 @@
 - src: git+https://gitlab.com/etke.cc/roles/swap
   version: 33ce32b065276a96b7e2562752f3a63913ed5480
 
+- src: git+https://gitlab.com/etke.cc/roles/ssh
+  version: 7458ce11f26822427eb5dc7356e59b3bd2399f7b
+
 - src: git+https://github.com/devture/com.devture.ansible.role.docker_sdk_for_python.git
   version: 129c8590e106b83e6f4c259649a613c6279e937a
 

setup.yml

@@ -39,6 +39,8 @@
 
     - role: galaxy/swap
 
+    - role: galaxy/ssh
+
     # This role exposes various tags (setup-postgres, setup-all, upgrade-postgres, import-postgres, etc.), so we don't tag it here.
     - role: galaxy/com.devture.ansible.role.postgres