Merge pull request 'Add host Rhodium' (#470) from rhodium into master

Reviewed-on: Netz39_Admin/netz39-infra-ansible#470
Reviewed-by: dkdent <dkdent@netz39.de>

README.md

@@ -20,6 +20,9 @@ SSH_KEY=<absolute/path/to/ssh/private/key>
 ansible-playbook setup-ssh.yml --ask-vault-pass -e "setup_ssh_logname=$LOGUSER" -e "setup_ssh_key=$SSH_KEY"
 ```
 
+This playbook also adds `rhodium.n39.eu` (OpenWRT router), but our Ansible cannot set up SSH keys (yet).
+Please [add your key to OpenWRT manually](https://openwrt.org/docs/guide-user/security/dropbear.public-key.auth#from_the_luci_web_interface).
+
 ## Edit vault encrypted vars files
 
 ```bash

inventory.yml

@@ -19,6 +19,8 @@ all:
     k3s-w1.n39.eu:
     k3s-w2.n39.eu:
     k3s-w3.n39.eu:
+#   Host rhodium.n39.eu is the OpenWRT router, but cannot be added here
+#   as it would be treated like a Debian host
 
   children:
     docker_host:

templates/ssh_config.j2

@@ -25,3 +25,11 @@ Host {{ host }}
   Port 22
 
 {% endfor %}
+
+{# This is our router #}
+Host rhodium.n39.eu
+  Hostname rhodium.n39.eu
+  IdentityFile {{ setup_ssh_key }}
+  User root
+  ProxyJump ssh.n39.eu
+  Port 22