Deploy a Replica Set部署副本集

Start each member of the replica set with the appropriate options.使用适当的选项启动复制副本集的每个成员。

For each member, start a mongod instance with the following settings:对于每个成员，使用以下设置启动一个mongod实例：

• Set replication.replSetName option to the replica set name. If your application connects to more than one replica set, each set must have a distinct name.将replication.replSetName选项设置为副本集名称。如果应用程序连接到多个复制副本集，则每个复制副本集都必须具有不同的名称。
• Set net.bindIp option to the hostname/ip or a comma-delimited list of hostnames/ips.将net.bindIp选项设置为主机名/ip或以逗号分隔的主机名/ips列表。
• Set any other settings as appropriate for your deployment.根据部署情况设置任何其他设置。

In this tutorial, the three mongod instances are associated with the following hosts:在本教程中，三个mongod实例与以下主机相关联：

The following example specifies the replica set name and the ip binding through the --replSet and --bind_ip command-line options:以下示例通过--replSet和--bind_ip命令行选项指定副本集名称和ip绑定：

mongod --replSet "rs0" --bind_ip localhost,<hostname(s)|ip address(es)>

For <hostname(s)|ip address(es)>, specify the hostname(s) and/or ip address(es) for your mongod instance that remote clients (including the other members of the replica set) can use to connect to the instance.对于<hostname(s)|ip address(es)>，指定mongod实例的主机名和/或ip地址，远程客户端（包括副本集的其他成员）可以用来连接到该实例。

Alternatively, you can also specify the replica set name and the ip addresses in a configuration file:或者，您也可以在配置文件中指定副本集名称和ip地址：

replication:
   replSetName: "rs0"
net:
   bindIp: localhost,<hostname(s)|ip address(es)>

To start mongod with a configuration file, specify the configuration file's path with the --config option:要使用配置文件启动mongod，请使用--config选项指定配置文件的路径：

mongod --config <path-to-config>

In production deployments, you can configure a init script to manage this process. Init scripts are beyond the scope of this document.在生产部署中，您可以配置init脚本来管理这个过程。Init脚本超出了本文档的范围。

Connect mongosh to one of the mongod instances.将mongosh连接到其中一个mongod实例。

From the same machine where one of the mongod is running (in this tutorial, mongodb0.example.net), start mongosh. 在运行其中一个mongod的同一台机器上（在本教程中，mongodb0.example.net），启动mongosh。To connect to the mongod listening to localhost on the default port of 27017, simply issue:要连接到默认端口27017上监听localhost的mongod，只需发出：

mongosh

Depending on your path, you may need to specify the path to the mongosh binary.根据您的路径，您可能需要指定mongosh二进制文件的路径。

If your mongod is not running on the default port, specify the --port option for mongosh.如果您的mongod没有在默认端口上运行，请为mongosh指定--port选项。

Initiate the replica set.启动复制副本集。

From mongosh, run rs.initiate() on replica set member 0.从mongosh中，对副本集成员0运行rs.initiate()。

rs.initiate( {
   _id : "rs0",
   members: [
      { _id: 0, host: "mongodb0.example.net:27017" },
      { _id: 1, host: "mongodb1.example.net:27017" },
      { _id: 2, host: "mongodb2.example.net:27017" }
   ]
})

MongoDB initiates a replica set, using the default replica set configuration.MongoDB使用默认的副本集配置启动一个副本集。

View the replica set configuration.查看复制副本集配置。

Use rs.conf() to display the replica set configuration object:使用rs.conf()显示副本集配置对象：

rs.conf()

The replica set configuration object resembles the following:复制副本集配置对象类似于以下内容：

{
   "_id" : "rs0",
   "version" : 1,
   "protocolVersion" : NumberLong(1),
   "members" : [
      {
         "_id" : 0,
         "host" : "mongodb0.example.net:27017",
         "arbiterOnly" : false,
         "buildIndexes" : true,
         "hidden" : false,
         "priority" : 1,
         "tags" : {

         },
         "secondaryDelaySecs" : NumberLong(0),
         "votes" : 1
      },
      {
         "_id" : 1,
         "host" : "mongodb1.example.net:27017",
         "arbiterOnly" : false,
         "buildIndexes" : true,
         "hidden" : false,
         "priority" : 1,
         "tags" : {

         },
         "secondaryDelaySecs" : NumberLong(0),
         "votes" : 1
      },
      {
         "_id" : 2,
         "host" : "mongodb2.example.net:27017",
         "arbiterOnly" : false,
         "buildIndexes" : true,
         "hidden" : false,
         "priority" : 1,
         "tags" : {

         },
         "secondaryDelaySecs" : NumberLong(0),
         "votes" : 1
      }
      
   ],
   "settings" : {
      "chainingAllowed" : true,
      "heartbeatIntervalMillis" : 2000,
      "heartbeatTimeoutSecs" : 10,
      "electionTimeoutMillis" : 10000,
      "catchUpTimeoutMillis" : -1,
      "getLastErrorModes" : {

      },
      "getLastErrorDefaults" : {
         "w" : 1,
         "wtimeout" : 0
      },
      "replicaSetId" : ObjectId("585ab9df685f726db2c6a840")
   }
}

Ensure that the replica set has a primary.请确保复制副本集具有主副本。

Use rs.status() to identify the primary in the replica set.使用rs.status()来标识副本集中的主副本。