- name: prepare some dirs
  file: name={{ item }} state=directory
  with_items:
  - "{{ bin_dir }}"
  - "{{ ca_dir }}"
  - "/etc/etcd/ssl"    # etcd 证书目录
  - "/var/lib/etcd"    # etcd 工作目录

- name: 下载etcd二进制文件
  copy: src={{ base_dir }}/bin/{{ item }} dest={{ bin_dir }}/{{ item }} mode=0755
  with_items:
  - etcd
  - etcdctl
  tags: upgrade_etcd

- 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] }}"

# 注册变量p，根据p的stat信息判断是否已经生成过etcd证书，如果没有，下一步生成证书
# 如果已经有etcd证书，为了保证整个安装的幂等性，跳过证书生成的步骤
- name: 读取etcd证书stat信息
  stat: path="/etc/etcd/ssl/etcd.pem"
  register: p

- name: 创建etcd证书请求
  template: src=etcd-csr.json.j2 dest=/etc/etcd/ssl/etcd-csr.json
  when: p.stat.isreg is not defined 

- name: 创建 etcd证书和私钥
  when: p.stat.isreg is not defined 
  shell: "cd /etc/etcd/ssl && {{ bin_dir }}/cfssl gencert \
        -ca={{ ca_dir }}/ca.pem \
        -ca-key={{ ca_dir }}/ca-key.pem \
        -config={{ ca_dir }}/ca-config.json \
        -profile=kubernetes etcd-csr.json | {{ bin_dir }}/cfssljson -bare etcd"

- name: 创建etcd的systemd unit文件
  template: src=etcd.service.j2 dest=/etc/systemd/system/etcd.service
  tags: upgrade_etcd

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

- name: 开启etcd服务
  shell: systemctl daemon-reload && systemctl restart etcd
  ignore_errors: true
  tags: upgrade_etcd

- name: 以轮询的方式等待服务同步完成
  shell: "systemctl status etcd.service|grep Active"
  register: etcd_status
  until: '"running" in etcd_status.stdout'
  retries: 8
  delay: 8
  tags: upgrade_etcd