00_pre_flight_checklist.yml

---
- name: Pre-flight checklist before installing k8s
  hosts: vm_host
  vars_files:
    - vars/k8s_cluster.yml
  tasks:
    - name: Check if kubernetes version is supported by the provisioner
      ansible.builtin.fail:
        msg: The chosen version is not supported, only versions >= 1.26 are supported
      when: k8s.cluster_version is version('1.26', '<')

    - name: Check if distribution is supported
      ansible.builtin.fail:
        msg: Your distribution is actually unsupported. Supported values are 'Fedora', 'CentOS', 'Ubuntu'
      when:
        - ansible_distribution != 'CentOS'
        - ansible_distribution != 'Fedora'
        - ansible_distribution != 'Ubuntu'

    - name: Check if target distribution is correct
      ansible.builtin.fail:
        msg: Target distribution is not supported. Supported values are 'Ubuntu', 'CentOS'
      when:
        - k8s.cluster_os != 'CentOS'
        - k8s.cluster_os != 'Ubuntu'

    # - name: Check if cri-o is selected on 1.29
    #   ansible.builtin.fail:
    #     msg: Please select a different container runtime as cri-o packages are not yet available for {{ k8s.cluster_version }} and {{ k8s.cluster_os }}
    #   when:
    #     - k8s.container_runtime == 'crio'
    #     - k8s.cluster_version is version('1.29', '==')
    #     # - k8s.cluster_os == 'CentOS'

    - name: Check at least one vm for control plane is defined
      ansible.builtin.fail:
        msg: At least one control plane should be selected
      when:
        - k8s.control_plane.vms is not defined or k8s.control_plane.vms <= 0

    - name: Check if master is schedulable in case of clusters composed by control plane VMs
      ansible.builtin.fail:
        msg: When provisioning a cluster without workers, you need to set k8s.master_schedulable to true in vars.
      when:
        - k8s.worker_nodes.vms is not defined or k8s.worker_nodes.vms <= 0
        - not k8s.master_schedulable

    - name: Fail fast if Rook cluster size exceeds worker nodes.
      ansible.builtin.fail:
        msg: You can't have less worker nodes than Rook cluster size
      when:
        - k8s.worker_nodes.vms < rook_ceph.rook_cluster_size
        - rook_ceph.install_rook

    - name: Fail fast if no container runtime is defined
      ansible.builtin.fail:
        msg: Select at least container runtime, 'containerd', 'crio'
      when:
        - k8s.container_runtime != 'crio'
        - k8s.container_runtime != 'containerd'

    - name: Fail fast if no ingress controller is selected
      ansible.builtin.fail:
        msg: If you want to install an ingress controller, select one among 'nginx', 'haproxy' or 'contour'
      when:
        - ingress_controller.install_ingress_controller
        - ingress_controller.type != 'nginx' and ingress_controller.type != 'haproxy' and ingress_controller.type != 'contour'

    - name: Fail fast if no container plugin selected
      ansible.builtin.fail:
        msg: Select at least a CNI plugin 'calico' or 'flannel'
      when:
        - k8s.network.cni_plugin != 'calico'
        - k8s.network.cni_plugin != 'flannel'
        - k8s.network.cni_plugin != 'cilium'