ansible/roles/kubernetes/tasks/Rocky.yml

- name: Install kubernetes on Rocky 9
  become: "{{ 'no' if inventory_hostname == 'nas.home.lan' else 'yes' }}"
  block:

    - name: Include role
      ansible.builtin.include_role:
        name: proxy_repo

    - name: Disable SELinux
      ansible.posix.selinux:
        state: permissive
        policy: targeted

    - name: Disable swap
      command: swapoff -a
      when: ansible_swaptotal_mb > 0

    - name: Remove swap from fstab
      replace:
        path: /etc/fstab
        regexp: '.*swap.*'
        replace: ''

    - name: Enable kernel modules
      copy:
        dest: /etc/modules-load.d/k8s.conf
        content: |
          overlay
          br_netfilter

    - name: Load kernel modules
      shell: |
        modprobe overlay
        modprobe br_netfilter

    - name: Set sysctl params
      copy:
        dest: /etc/sysctl.d/k8s.conf
        content: |
          net.bridge.bridge-nf-call-iptables = 1
          net.bridge.bridge-nf-call-ip6tables = 1
          net.ipv4.ip_forward = 1

    - name: Apply sysctl
      command: sysctl --system

    - name: Install required packages
      dnf:
        name:
          - yum-utils
          - device-mapper-persistent-data
          - lvm2
        state: present

    - name: Add Kubernetes repo
      copy:
        dest: /etc/yum.repos.d/kubernetes.repo
        content: |
          [kubernetes]
          name=Kubernetes
          baseurl=https://pkgs.k8s.io/core:/stable:/v1.29/rpm/
          enabled=1
          gpgcheck=1
          gpgkey=https://pkgs.k8s.io/core:/stable:/v1.29/rpm/repodata/repomd.xml.key

    - name: Add Docker CE repository
      get_url:
        url: https://download.docker.com/linux/centos/docker-ce.repo
        dest: /etc/yum.repos.d/docker-ce.repo
        mode: '0644'

    - name: Install containerd
      dnf:
        name: containerd.io
        state: present

    - name: Configure containerd
      shell: |
        mkdir -p /etc/containerd
        containerd config default > /etc/containerd/config.toml
        sed -i 's/SystemdCgroup = false/SystemdCgroup = true/' /etc/containerd/config.toml

    - name: Enable and start containerd
      systemd:
        name: containerd
        enabled: yes
        state: started

    - name: Install Kubernetes packages
      dnf:
        name:
          - kubelet
          - kubeadm
          - kubectl
        disable_excludes: kubernetes
        state: present

    - name: Enable kubelet
      systemd:
        name: kubelet
        enabled: yes
        state: started

    - name: Initialize Kubernetes
      command: kubeadm init --pod-network-cidr=10.244.0.0/16
      args:
        creates: /etc/kubernetes/admin.conf
      when: inventory_hostname == 'rocky9-vm01.home.lan'

    - name: Setup kubeconfig for user
      become_user: rocky
      shell: |
        mkdir -p $HOME/.kube
        sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
        sudo chown jd:jd $HOME/.kube/config
      when: inventory_hostname == 'rocky9-vm01.home.lan'

    - name: Install Flannel CNI
      become_user: rocky
      command: kubectl apply -f https://raw.githubusercontent.com/flannel-io/flannel/master/Documentation/kube-flannel.yml
      when: inventory_hostname == 'rocky9-vm01.home.lan'

    - name: Get join command
      command: kubeadm token create --print-join-command
      register: join_command
      when: inventory_hostname == 'rocky9-vm01.home.lan'


    - name: Save join command
      set_fact:
        worker_join_cmd: "{{ join_command.stdout }}"
      when: inventory_hostname == 'rocky9-vm01.home.lan'


    - name: Join cluster
      command: "{{ hostvars['rocky9-vm01.home.lan'].worker_join_cmd }}"
      args:
        creates: /etc/kubernetes/kubelet.conf