MongoDB集群搭建（三副本模式）

1、添加官方Yum源

vi /etc/yum.repos.d/mongodb-org-4.4.repo

[mongodb-org-4.4]
name=MongoDB Repository
baseurl=https://repo.mongodb.org/yum/redhat/$releasever/mongodb-org/4.4/x86_64/
gpgcheck=1
enabled=1
gpgkey=https://www.mongodb.org/static/pgp/server-4.4.

2、安装MongoDB

yum install -y mongodb-org

3、修改数据存储路径及监听IP地址

# 创建数据存储目录
cd /ssd
mkdir mongodb
chown -R mongod:mongod mongodb
chmod 0755 mongodb
rm -rf /var/run/mongodb

# 修改数据存储目录、PID文件目录及监听IP地址
vi /etc/mongod.conf

# Where and how to store data.
storage:
  dbPath: /ssd/mongodb

# how the process runs
processManagement:
  fork: true  # fork and run in background
  pidFilePath: /ssd/mongodb/mongod.pid  # location of pidfile
  timeZoneInfo: /usr/share/zoneinfo

# network interfaces
net:
  port: 27017
  bindIp: 127.0.0.1,10.255.200.1

# 修改服务配置对应的数据目录信息   
vi /usr/lib/systemd/system/mongod.service

# ExecStartPre=/usr/bin/mkdir -p /var/run/mongodb
# ExecStartPre=/usr/bin/chown mongod:mongod /var/run/mongodb
# ExecStartPre=/usr/bin/chmod 0755 /var/run/mongodb
PermissionsStartOnly=true
PIDFile=/ssd/mongodb/mongod.pid

# 启动服务
systemctl daemon-reload
systemctl start mongod
systemctl enable mongod

4、副本集配置

# 生成认证key，复制到集群其它节点并修改权限
cd /ssd/mongodb
openssl rand -base64 756 > replica.key
chmod 400 replica.key
chown -R mongod:mongod replica.key

# 修改配置文件
vi /etc/mongod.conf

security:
  authorization: enabled
  keyFile: /ssd/mongodb/replica.key

#operationProfiling:

replication:
  replSetName: devops

# 重启服务
systemctl restart mongod

# 初始化集群
mongo

rs.initiate(
  {
    _id : "devops",
    members: [
      { _id : 0, host : "10.255.200.1:27017" },
      { _id : 1, host : "10.255.200.2:27017" },
      { _id : 2, host : "10.255.200.3:27017" }
    ]
  }
)

rs.status()

5、创建管理员账号

mongo

use admin
db.createUser(
  {
    user: "hbtv",
    pwd: passwordPrompt(), 
    roles: [ { role: "userAdminAnyDatabase", db: "admin" }, "readWriteAnyDatabase" ]
  }
)