main.yml

# 创建kubelet,kube-proxy工作目录和cni配置目录
- name: 创建kube-node 相关目录
  file: name={{ item }} state=directory
  with_items:
  - /var/lib/kubelet
  - /var/lib/kube-proxy
  - /etc/cni/net.d
  - /root/.kube

- name: 下载 kubelet,kube-proxy 二进制和基础 cni plugins
  copy: src={{ base_dir }}/bin/{{ item }} dest={{ bin_dir }}/{{ item }} mode=0755
  with_items:
  - kubectl
  - kubelet
  - kube-proxy
  - bridge
  - host-local
  - loopback
  tags: upgrade_k8s

- name: 分发 kubeconfig配置文件
  synchronize: src=/root/.kube/config dest=/root/.kube/config
  delegate_to: "{{ groups.deploy[0] }}"

- name: 添加 kubectl 命令自动补全
  lineinfile:
    dest: ~/.bashrc
    state: present
    regexp: 'kubectl completion'
    line: 'source <(kubectl completion bash)'

- name: ansible 控制端添加 kubectl 自动补全
  lineinfile:
    dest: ~/.bashrc
    state: present
    regexp: 'kubectl completion'
    line: 'source <(kubectl completion bash)'
  connection: local
  run_once: true
  ignore_errors: true

- name: 分发证书相关
  synchronize: src={{ ca_dir }}/{{ item }} dest={{ ca_dir }}/{{ item }}
  with_items:
  - ca.pem
  - ca-key.pem
  - ca.csr
  - ca-config.json
  delegate_to: "{{ groups.deploy[0] }}"

##----------kubelet 配置部分--------------
- name: 准备kubelet 证书签名请求
  template: src=kubelet-csr.json.j2 dest={{ ca_dir }}/kubelet-csr.json

- name: 创建 kubelet 证书与私钥
  shell: "cd {{ ca_dir }} && {{ bin_dir }}/cfssl gencert \
        -ca={{ ca_dir }}/ca.pem \
        -ca-key={{ ca_dir }}/ca-key.pem \
        -config={{ ca_dir }}/ca-config.json \
        -profile=kubernetes kubelet-csr.json | {{ bin_dir }}/cfssljson -bare kubelet"

# 创建kubelet.kubeconfig 
- name: 设置集群参数
  shell: "{{ bin_dir }}/kubectl config set-cluster kubernetes \
        --certificate-authority={{ ca_dir }}/ca.pem \
        --embed-certs=true \
        --server={{ KUBE_APISERVER }} \
	--kubeconfig=kubelet.kubeconfig"

- name: 设置客户端认证参数
  shell: "{{ bin_dir }}/kubectl config set-credentials system:node:{{ inventory_hostname }} \
        --client-certificate={{ ca_dir }}/kubelet.pem \
        --embed-certs=true \
        --client-key={{ ca_dir }}/kubelet-key.pem \
	--kubeconfig=kubelet.kubeconfig"

- name: 设置上下文参数
  shell: "{{ bin_dir }}/kubectl config set-context default \
        --cluster=kubernetes \
	--user=system:node:{{ inventory_hostname }} \
	--kubeconfig=kubelet.kubeconfig"

- name: 选择默认上下文
  shell: "{{ bin_dir }}/kubectl config use-context default \
	--kubeconfig=kubelet.kubeconfig"

- name: 移动 kubelet.kubeconfig
  shell: "mv /root/kubelet.kubeconfig /etc/kubernetes/"

- name: 准备 cni配置文件
  template: src=cni-default.conf.j2 dest=/etc/cni/net.d/10-default.conf

- name: 创建kubelet的systemd unit文件
  template: src=kubelet.service.j2 dest=/etc/systemd/system/kubelet.service
  tags: upgrade_k8s, restart_node 

- name: 开机启用kubelet 服务
  shell: systemctl enable kubelet
  ignore_errors: true

- name: 开启kubelet 服务
  shell: systemctl daemon-reload && systemctl restart kubelet
  tags: upgrade_k8s, restart_node

##-------kube-proxy部分----------------
- name: 安装kube-proxy.kubeconfig配置文件
  synchronize: src=/etc/kubernetes/kube-proxy.kubeconfig dest=/etc/kubernetes/kube-proxy.kubeconfig
  delegate_to: "{{ groups.deploy[0] }}"

- name: 创建kube-proxy 服务文件
  tags: reload-kube-proxy, upgrade_k8s, restart_node
  template: src=kube-proxy.service.j2 dest=/etc/systemd/system/kube-proxy.service

- name: 开机启用kube-proxy 服务
  shell: systemctl enable kube-proxy
  ignore_errors: true

- name: 开启kube-proxy 服务
  shell: systemctl daemon-reload && systemctl restart kube-proxy
  tags: reload-kube-proxy, upgrade_k8s, restart_node

# 批准 node 节点，首先轮询等待kubelet启动完成
- name: 轮询等待kubelet启动
  shell: "systemctl status kubelet.service|grep Active"
  register: kubelet_status
  until: '"running" in kubelet_status.stdout'
  retries: 8
  delay: 2

#- name: 获取csr 请求信息
#  shell: "sleep 3 && {{ bin_dir }}/kubectl get csr"
#  delegate_to: "{{ groups.deploy[0] }}"
#  register: csr_info
#  run_once: true

#- name: approve-kubelet-csr
#  shell: "{{ bin_dir }}/kubectl get csr|grep 'Pending' | awk 'NR>0{print $1}'| \
#        xargs {{ bin_dir }}/kubectl certificate approve"
#  when: '"Pending" in csr_info.stdout'
#  delegate_to: "{{ groups.deploy[0] }}"
#  run_once: true

- name: 轮询等待node达到Ready状态
  shell: "{{ bin_dir }}/kubectl get node {{ inventory_hostname }}|awk 'NR>1{print $2}'"
  register: node_status
  delegate_to: "{{ groups.deploy[0] }}"
  until: node_status.stdout == "Ready" or node_status.stdout == "Ready,SchedulingDisabled"
  retries: 8 
  delay: 8
  tags: upgrade_k8s, restart_node

- name: 设置node节点role
  shell: "{{ bin_dir }}/kubectl label node {{ inventory_hostname }} kubernetes.io/role=node --overwrite"
  ignore_errors: true
  delegate_to: "{{ groups.deploy[0] }}"