Question: K8S roles about ansible-rancher HOT 3 CLOSED

Hi @tuxpeople,

A host should only be assigned to a single group.

We use this Ansible roles to install Rancher clusters in a wide variety of scenarios. For local/dev setups you are totally right, it would make 100% sense to assign the role exclusively depending on the hosts group assignment (..._master/..._worker). In real world use cases we also already had scenarios where we needed mix roles in different ways. Therefore we chose to include a configuration option in form of the k8s_roles group variable to gain this flexibility.

I usually test the local setup using this setup here: https://github.com/PhilipSchmid/vagrant-rancher-playground (the automated setup using Ansible variant).
For efficiency purposes I usually also deploy all roles to all nodes since my system is a bit limited regarding cpu/memory resources and therefore I can't really run a dedicated 3 node HA control plane cluster etc..

• My inventory in this case only uses two groups - one for the Rancher control plane cluster und one for the custom K8s cluster: https://github.com/PhilipSchmid/vagrant-rancher-playground/blob/6c85074c3c1445dad25b539cd582aebc7c34b53f/ansible_setup/ansible-rancher/inventories/site#L16-L24
• I then assign the roles via group_vars: https://github.com/PhilipSchmid/vagrant-rancher-playground/tree/master/ansible_setup/ansible-rancher/inventories/group_vars

I would recommend you to do the same for your testing/development environment. I hope this answers your question. If not, please feel free to ask additional questions. Thanks.

Regards,
Philip

from ansible-rancher.

Here is the regarding part: ... {% for role in hostvars[item]['k8s_roles'] %} --{{ role }}{% endfor %}

Regards,
Philip

from ansible-rancher.

Got it. Thanks a lot!

from ansible-rancher.