在/root目录下创建example目录作为Ansible工作目录，部署的入口文件命名为cscc_install.yaml，对其他两台云主机进行安装高可用数据库集群（MariaDB_Galera_cluster，数据库密码设置为123456）的操作

# 设置免密认证，多节点执行
yum -y install /opt/python-keyczar-0.71c-2.el7.noarch.rpm  
yum -y install /opt/sshpass-1.05-5.el7.x86_64.rpm  
yum -y install ansible 

vi /etc/ansible/hosts 
[controller]
192.168.200.72
[compute]
192.168.200.92

ssh-keygen
ssh-copy-id  -i /root/.ssh/id_rsa.pub  192.168.200.72
ssh-copy-id  -i /root/.ssh/id_rsa.pub  192.168.200.92

mkdir example
vi example/cscc_install.yaml
---
  - hosts: all
    tasks:
    - name: inatell packages
      yum:
        name: "{{ packages }}"
      vars:
        packages:
        - mariadb
        - mariadb-server
        - galera
        - net-tools
    - name: start mariadb
      service: name=mariadb state=started
    - name: init mariadb
      script: mysql_init.sh
    - name: stop mariadb
      service: name=mariadb state=stopped
    - name: use template
      template:
        src: mariadb-server.cnf.j2
        dest: /etc/my.cnf.d/mariadb-server.cnf
  - hosts: cluster1
    tasks:
    - name: start cluster1
      shell: "nohup /usr/libexec/mysqld --wsrep-new-cluster --user=mysql &"
      async: 10
      poll: 0
    - wait_for: port=4567 state=started
  - hosts: cluster2
    tasks:
    - name: start cluster2
      service: name=mariadb state=started

vi mariadb-server.cnf.j2
[server]

[mysqld]
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock
log-error=/var/log/mariadb/mariadb.log
pid-file=/var/run/mariadb/mariadb.pid

[galera]
wsrep_on=ON                                                     #节点已经开启
wsrep_provider=/usr/lib64/galera/libgalera_smm.so               #启用galera模块
wsrep_cluster_address=gcomm://192.168.200.72,192.168.200.92     #指定集群中节点的IP
binlog_format=row                                               #二进制日志格式必须为行
default_storage_engine=InnoDB                                   #存储引擎（只支持InnoDB）
innodb_autoinc_lock_mode=2                                      #总结点数量(视自己情况而定，算上主节点）
bind-address=0.0.0.0                                            #绑定本机的所有IP
wsrep_cluster_name="Mariadb_Galera_Cluster"                     #集群的名字
wsrep_node_address="{{ ansible_default_ipv4.address }}"         #节点的IP
wsrep_node_name = "{{ ansible_hostname }}"                      #节点的名称
wsrep_sst_method=rsync                                          #集群使用rsync同步方式

[embedded]

[mariadb]

[mariadb-10.1]

vi mysql_init.sh
mysqladmin -uroot password 123456
mysql -uroot -p123456 -e 'grant all privileges on *.* to root@"%" identified by "123456";'
mysql -uroot -p123456 -e 'flush privileges;'

验证
#查看节点数
show  status like "wsrep_cluster_size";
#查看加入的节点ip
show  global status like 'wsrep_incoming_addresses';

创建4台虚拟机，一台ansible母鸡，三台node，解压部署zookeeper和kafka集群高可靠