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

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

- 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_31_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:/v1.31/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:/v1.31/deb/ /
    state: present

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

- 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: Update System-Wide Profile for Kubernetes
  ansible.builtin.copy:
    dest: /etc/profile.d/kubernetes.sh
    content: |
      export KUBECONFIG=/etc/kubernetes/admin.conf
      export ANSIBLE_USER="ansible"

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

- name: Replace Docker daemon.json configuration
  ansible.builtin.copy:
    dest: /etc/docker/daemon.json
    content: |
      {
        "exec-opts": ["native.cgroupdriver=systemd"],
        "log-driver": "json-file",
        "log-opts": {
          "max-size": "100m"
        },
        "storage-driver": "overlay2"
      }

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

- name: Restart Docker service
  ansible.builtin.service:
    name: docker
    state: restarted

- name: Update Kubeadm Environment Variable
  ansible.builtin.command:
    cmd: sudo sed -i -e '/^\[Service\]/a Environment="KUBELET_EXTRA_ARGS=--fail-swap-on=false"' /usr/lib/systemd/system/kubelet.service.d/10-kubeadm.conf

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

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

- name: Pull kubeadm container images
  ansible.builtin.command:
    cmd: sudo kubeadm config images pull

- name: Initialize Kubernetes control plane
  ansible.builtin.command:
    cmd: kubeadm init --pod-network-cidr=10.244.0.0/16
    creates: /tmp/kubeadm_output
  register: kubeadm_init_output
  become: true
  changed_when: false

- name: Set permissions for Kubernetes Admin
  ansible.builtin.file:
    path: /etc/kubernetes/admin.conf
    state: file
    owner: ansible
    mode: "0755"

- name: Store Kubernetes initialization output to file
  copy:
    content: "{{ kubeadm_init_output.stdout }}"
    dest: /tmp/kubeadm_output
  become: true
  delegate_to: localhost

- name: Generate the Join Command
  ansible.builtin.shell: cat /tmp/kubeadm_output | tail -n 2 | sed ':a;N;$!ba;s/\\\n\s*/ /g' > /tmp/join-command
  delegate_to: localhost

- name: Set permissions for the Join Executable
  ansible.builtin.file:
    path: /tmp/join-command
    state: file
    mode: "0755"
  delegate_to: localhost