kubernetes-centos7-ansible.yml

---
- hosts: masters
  become: yes
  become_method: sudo
  tasks:
    - name: install yum utils
      yum:
       name: yum-utils
       state: latest
    - name: add docker yum repo
      shell: |
        sudo yum-config-manager \
          --add-repo \
          https://download.docker.com/linux/centos/docker-ce.repo
    - name: install docker
      yum: 
        name: "{{ item }}"
        state: latest
      vars: 
        packages:
          - docker-ce
          - docker-ce-cli
          - containerd.io
      with_items: "{{ packages }}"
    - name: enable docker
      service:
        name: docker
        state: started
        enabled: yes
    - name: set setenforce 0
      shell: |
        setenforce 0 && \
        sed -i 's/^SELINUX=enforcing$/SELINUX=permissive/' /etc/selinux/config
    - name: add kube repo
      shell: |
        cat <<EOF > /etc/yum.repos.d/kubernetes.repo
        [kubernetes]
        name=Kubernetes
        baseurl=https://packages.cloud.google.com/yum/repos/kubernetes-el7-\$basearch
        enabled=1
        gpgcheck=1
        repo_gpgcheck=1
        gpgkey=https://packages.cloud.google.com/yum/doc/yum-key.gpg https://packages.cloud.google.com/yum/doc/rpm-package-key.gpg
        exclude=kubelet kubeadm kubectl
    - name: install kubernetes for master
      yum:
        name: "{{ item }}"
        state: latest
        disable_excludes: kubernetes
      vars:
        packages:
          - kubelet
          - kubectl
          - kubeadm 
      with_items: "{{ packages }}"
    - name: start kubelet
      service:
        name: kubelet
        enabled: yes
        state: started