playbooks;inventory: added variable to production.yaml and added create-ssh-key playbook

The production inventory got a new variable called host_name which we use in the
newly added playbook creating an SSH key.
The playbook holds the no_log tag for keeping the execution parts more secure.

Signed-off-by: Marc Mattmüller <marc.mattmueller@netmodule.com>

inventory/production.yaml

@@ -3,3 +3,4 @@ linux:
     192.168.40.221:
       rls_info_path: /etc/os-release
       user_name: user
+      host_name: testvm

playbooks/getting_started/create-ssh-key.yml

@@ -0,0 +1,19 @@
+- name: Create SSH Keypair
+  hosts: linux
+  gather_facts: false
+  vars:
+    ssh_passphrase: !vault |
+          $ANSIBLE_VAULT;1.1;AES256
+          61323235356163363166663139613464303262333231656236313335313133373330316431333139
+          3135643639363966653938663666653831393132633765340a306665393864343466376637386661
+          39353535616366393631333161613065356666626266396138633866346462316365663339613263
+          6564643935326565630a386266376230613230336564363066373730363239303763663666363462
+          35353634626464656436633165316336323839616463333064633363306337353534
+  tasks:
+    - name: Generate ssh keypair on host
+      ansible.builtin.shell: |
+        ssh-keygen -t ed25519 -f "{{host_name}}_ed25519" -N "{{ssh_passphrase}}" -C "{{host_name}}@testenv"
+      args:
+         chdir: ~/.ssh
+         executable: /bin/bash
+      no_log: True