Cannot add system when starting from scratch

[TomSie]

When starting with a new database and not configuring any hosts, "Add system" fails with an error message:

[maverickwoo]

I think this issue happened when adding a system before adding a Location. (The locations and systems_location tables are both empty.)

Some more notes:

1. In a fresh installation, the locations, systems, and systems_location tables are all empty in the database. The runner system CRUD operations on the web interface would want to take these corner cases into account. (It seems the current code is written to assume there is at least one location in the DB and will assign any new hosts to that location.)

2. Upon auditing the code, there is currently a notion of "host names that start with the string dev-". These seem to be intended for runner systems that were added through the web interface:
   

   fluffi/srv/fluffi/data/fluffiweb/app/templates/systems.html

   Lines 212 to 213 in ab9b81f

   	{% if host.isNotPersistentDevSys == True %}
   	<td style="text-align: left; width: 20%;"><a href="/systems/view/dev-{{ host.Name }}/{{ group.Name }}">{{

   
   So it seems the design intends to have two steps when adding a runner:
   1. Add the runner system(s) and assign them a location using the web interface. This would update the DB and would be doable after the bug and Changing location after adding first location does not work #100 are fixed.
   2. Manually modify the Ansible inventory file in the file system so that Ansible also knows about these runner systems in a future restart of the PoleMarch container. In retrospect, I think this is likely what this step really means:
      

      fluffi/getting_started.md

      Line 91 in ab9b81f

      - change /srv/fluffi/data/dnsmasq/hosts e.g., if you want to give some systems static IP addresses or if you want to move services to different machines

[p4cx]

Still not fixed. Work in progress!