tah-deploy/ansible/kubernetes_worker/tasks/main.yml

---
# tasks file for kubernetes_worker
- name: Install required packages
  ansible.builtin.apt:
    name:
      - curl
      - gnupg2
      - software-properties-common
      - apt-transport-https
      - ca-certificates
    state: present
    update_cache: true

- name: Set a hostname
  ansible.builtin.hostname:
    name: worker-{{ hostvars[inventory_hostname]['ansible_default_ipv4']['address'] }}

- name: Install Docker
  ansible.builtin.apt:
    name: docker.io
    state: present
    update_cache: true

- name: Remove Keyrings Directory (if it exists)
  ansible.builtin.command: rm -rf /etc/apt/keyrings
- name: Remove Existing Kubernetes Directory (if it exists)
  ansible.builtin.command: sudo rm -rf /etc/apt/sources.list.d/pkgs_k8s_io_core_stable_v1_30_deb.list
- name: Disable swap
  ansible.builtin.command:
    cmd: swapoff -a

- name: Ensure swap is disabled on boot
  ansible.builtin.command:
    cmd: sudo sed -i -e '/\/swap.img\s\+none\s\+swap\s\+sw\s\+0\s\+0/s/^/#/' /etc/fstab

- name: Add kernel modules for Containerd
  ansible.builtin.copy:
    dest: /etc/modules-load.d/containerd.conf
    content: |
      overlay
      br_netfilter

- name: Load kernel modules for Containerd
  ansible.builtin.shell:
    cmd: modprobe overlay && modprobe br_netfilter
  become: true

- name: Add kernel parameters for Kubernetes
  ansible.builtin.copy:
    dest: /etc/sysctl.d/kubernetes.conf
    content: |
      net.bridge.bridge-nf-call-ip6tables = 1
      net.bridge.bridge-nf-call-iptables = 1
      net.ipv4.ip_forward = 1

- name: Load kernel parameter changes
  ansible.builtin.command:
    cmd: sudo sysctl --system

- name: Configuring Containerd (building the configuration file)
  ansible.builtin.command:
    cmd: sudo sh -c "containerd config default > /opt/containerd/config.toml"

- name: Configuring Containerd (Setting SystemdCgroup Variable to True)
  ansible.builtin.command:
    cmd: sudo sed -i 's/SystemdCgroup = false/SystemdCgroup = true/' /opt/containerd/config.toml

- name: Reload systemd configuration
  ansible.builtin.command:
    cmd: systemctl daemon-reload

- name: Restart containerd service
  ansible.builtin.service:
    name: containerd
    state: restarted

- name: Allow 6443/tcp through firewall
  ansible.builtin.command:
    cmd: sudo ufw allow 6443/tcp

- name: Allow 2379:2380/tcp through firewall
  ansible.builtin.command:
    cmd: sudo ufw allow 2379:2380/tcp

- name: Allow 22/tcp through firewall
  ansible.builtin.command:
    cmd: sudo ufw allow 22/tcp

- name: Allow 8080/tcp through firewall
  ansible.builtin.command:
    cmd: sudo ufw allow 8080/tcp

- name: Allow 10250/tcp through firewall
  ansible.builtin.command:
    cmd: sudo ufw allow 10250/tcp

- name: Allow 10251/tcp through firewall
  ansible.builtin.command:
    cmd: sudo ufw allow 10251/tcp

- name: Allow 10252/tcp through firewall
  ansible.builtin.command:
    cmd: sudo ufw allow 10252/tcp

- name: Allow 10255/tcp through firewall
  ansible.builtin.command:
    cmd: sudo ufw allow 10255/tcp

- name: Allow 5473/tcp through firewall
  ansible.builtin.command:
    cmd: sudo ufw allow 5473/tcp

- name: Enable the firewall
  community.general.ufw:
    state: enabled

- name: Reload the firewall
  ansible.builtin.command:
    cmd: sudo ufw reload

- name: Prepare keyrings directory and update permissions
  ansible.builtin.file:
    path: /etc/apt/keyrings
    state: directory
    mode: "0755"

- name: Download Kubernetes GPG key securely
  ansible.builtin.shell: curl -fsSL https://pkgs.k8s.io/core:/stable:/v1.30/deb/Release.key | sudo gpg --dearmor -o /etc/apt/keyrings/kubernetes-apt-keyring.gpg

- name: Add Kubernetes repository
  ansible.builtin.apt_repository:
    repo: deb [signed-by=/etc/apt/keyrings/kubernetes-apt-keyring.gpg] https://pkgs.k8s.io/core:/stable:/v1.30/deb/ /
    state: present

- name: Install kubeadm, kubelet, kubectl
  ansible.builtin.apt:
    name:
      - kubelet
      - kubeadm
      - kubectl
    state: present
    update_cache: true

- name: Hold kubelet, kubeadm, kubectl packages
  ansible.builtin.command:
    cmd: sudo apt-mark hold kubelet kubeadm kubectl

- name: Replace /etc/default/kubelet contents
  ansible.builtin.copy:
    dest: /etc/default/kubelet
    content: KUBELET_EXTRA_ARGS="--cgroup-driver=cgroupfs"

- name: Reload systemd configuration
  ansible.builtin.command:
    cmd: systemctl daemon-reload

- name: Restart kubelet service
  ansible.builtin.service:
    name: kubelet
    state: restarted

- name: Reboot the system
  ansible.builtin.reboot:
    msg: Reboot initiated by Ansible for Kubernetes setup
    reboot_timeout: 150

- name: Copy join-command file to worker nodes
  ansible.builtin.copy:
    src: /tmp/join-command
    dest: /tmp/join-command
    mode: "0755"

- name: Join Worker Nodes
  ansible.builtin.command: sh /tmp/join-command
  become: true