# sure, this should be a role or whatever
---
- name: Install Kubernetes
  hosts: vps1
  vars:
    cni_plugins_version: "v1.4.0"
  tasks:
    # ====================
    # https://kubernetes.io/docs/setup/production-environment/tools/kubeadm/install-kubeadm/
    - name: Add K8s key
      ansible.builtin.apt_key:
        url: "https://pkgs.k8s.io/core:/stable:/v1.29/deb/Release.key"
        keyring: /etc/apt/keyrings/kubernetes-apt-keyring.gpg
    - name: Add K8s apt repo
      ansible.builtin.apt_repository:
        repo: "deb [signed-by=/etc/apt/keyrings/kubernetes-apt-keyring.gpg] https://pkgs.k8s.io/core:/stable:/v1.29/deb/ /"
        filename: kubernetes
    - name: Install K8s tools
      ansible.builtin.apt:
        update_cache: true
        name:
          - kubelet
          - kubeadm
          - kubectl
    - name: Hold kubeadm
      ansible.builtin.dpkg_selections:
        name: "{{ item  }}"
        selection: hold
      loop:
        - kubelet
        - kubeadm
        - kubectl
    # ====================
    # https://github.com/containerd/containerd/blob/main/docs/getting-started.md
    # https://docs.docker.com/engine/install/ubuntu/
    - name: Add docker key
      ansible.builtin.command:
        cmd: "curl -fsSL https://download.docker.com/linux/ubuntu/gpg -o /etc/apt/keyrings/docker.asc"
        creates: /etc/apt/keyrings/docker.asc
    - name: Add Docker apt repo
      ansible.builtin.apt_repository:
        repo: "deb [arch=amd64 signed-by=/etc/apt/keyrings/docker.asc] https://download.docker.com/linux/ubuntu jammy stable"
        filename: docker
    - name: Install containerd/runc
      ansible.builtin.apt:
        name: containerd.io
        update_cache: true
    - name: Configure containerd to use systemd cgroups
      ansible.builtin.copy:
        src: "../vps1/containerd-config.toml"
        dest: "/etc/containerd/config.toml"
        mode: "u=r,g=r,o=r"
      notify:
        - "Containerd config changed"
    - name: Create /opt/cni/bin
      ansible.builtin.file:
        path: /opt/cni/bin
        state: directory
        mode: "u=rwx,g=rx,o=rx"
    - name: Download CNI plugins
      ansible.builtin.get_url:
        url: "https://github.com/containernetworking/plugins/releases/download/{{ cni_plugins_version }}/cni-plugins-linux-amd64-{{ cni_plugins_version }}.tgz"
        dest: "/tmp/cni-plugins-linux-amd64-{{ cni_plugins_version }}.tgz"
    - name: Install CNI plugins
      ansible.builtin.command:
        cmd: "tar Cxzvf /opt/cni/bin /tmp/cni-plugins-linux-amd64-{{ cni_plugins_version }}.tgz"
        creates: /opt/cni/bin/tap
    # ====================
    # https://kubernetes.io/docs/tasks/administer-cluster/kubeadm/configure-cgroup-driver/
    - name: Copy config
      ansible.builtin.copy:
        src: "../vps1/kubeadm-config.yaml"
        dest: "/root/kubeadm-config.yaml"
        mode: "u=r,g=r,o=r"
    # ====================
    # https://kubernetes.io/docs/setup/production-environment/tools/kubeadm/create-cluster-kubeadm
    # https://kubernetes.io/docs/setup/production-environment/tools/kubeadm/create-cluster-kubeadm/#initializing-your-control-plane-node
    - name: Init
      ansible.builtin.command:
        cmd: kubeadm init --config /root/kubeadm-config.yaml
        creates: /var/lib/kubelet/config.yaml
      notify:
        - "Installed Cluster"
    # We may need to export KUBECONFIG=/etc/kubernetes/admin.conf ?
  handlers:
    - name: "Containerd config changed"
      ansible.builtin.service:
        name: containerd
        state: reloaded
    - name: "Installed Cluster"
      ansible.builtin.command:
        cmd: kubectl apply -f https://github.com/flannel-io/flannel/releases/v0.24.2/download/kube-flannel.yml
      environment:
        KUBECONFIG: /etc/kubernetes/admin.conf