mongodb replication in sharded machine

Question

I have done Replication in one single machine with three different port(Say 27018[master],27019,27020). Also I have done Sharding in one single machine with two different port(Say 27021,27022).

Now I have to implement replication for the sharded machine port. I need to implement replication for 27021 and 27022. How can I do this? Please help me to resolve this issue.

Steps followed :

Part 1: Set up 3 port for replication

1. mongod --replSet rs0
2. mongod --port 27018 --dbpath F:\Data1 --replSet rs0
3. mongod --port 27020 --dbpath F:\Data2 --replSet rs0
4. mongo localhost:27017
5. rs.initiate()
6. rs.add("ComputerName:27018")
7. rs.add("ComputerName:27020")

Part 2: Now set up for sharding

8. mongod --configsvr --replSet configReplSet
9. mongod --port 27021 --dbpath F:\Data4 --replSet configReplSet
10. mongod --port 27025 --dbpath F:\Data5 --replSet configReplSet
11. mongo 127.0.0.1:27019
12. rs.initiate({_id:"configReplSet",configsvr:true,members:[{_id: 0,host: "127.0.0.1:27021"},{_id:1,host: "127.0.0.1:27025"}]})

When I run this code I am getting an error:

{
    "ok" : 0,
    "errmsg" : "No host described in new configuration 1 for replica set configReplSet maps to this node",
    "code" : 93
}

So remaining steps I am not able to execute. Any idea how can I overcome this issue?

Answer 1

Got one method to achieve my requirement. Steps as follows

Config Server and its replication

• mongod --configsvr --dbpath F:\Data1\configdb\ --replSet rs2 --port 27017
• mongod --configsvr --dbpath F:\Data2\configdb\ --replSet rs2 --port 27018
• mongod --configsvr --dbpath F:\Data3\configdb\ --replSet rs2 --port 27019
• mongo machineip:27017
• config= {_id:"rs2", members :[{ _id:0, host:'10.18.0.225:27017'}, {_id:1, host:'10.18.0.225:27018'}, {_id:2, host:'10.18.0.225:27019'}]}
• rs.initiate (config)
• rs.status()

Routing Server

• mongos -configdb machineip:27017 --port 27020

Shard1 and its replication

• mongod --dbpath F:\Data4\db\ --shardsvr --replSet rs0 --port 27021
• mongod --dbpath F:\Data5\db\ --shardsvr --replSet rs0 --port 27022
• mongod --dbpath F:\Data6\db\ --shardsvr --replSet rs0 --port 27023

Shard2 and its replication

• mongod --dbpath F:\Data7\db\ --shardsvr --replSet rs1 --port 27024
• mongod --dbpath F:\Data8\db\ --shardsvr --replSet rs1 --port 27025
• mongod --dbpath F:\Data9\db\ --shardsvr --replSet rs1 --port 27026

Replication configuration for Shard1

• mongo machineip:27021
• config= {_id:"rs0", members :[{ _id:0, host:'machineip:27021'},{_id:1,host:'machineip:27022'},{_id:2,host:'machineip:27023'}]}
• rs.initiate(config)
• rs.status()

Replication configuration for Shard2

• mongo machineip:27024
• config= {_id:"rs0", members :[{ _id:0, host:'machineip:27024''},{_id:1,host:'machineip:27025''},{_id:2,host:'machineip:27026''}]}
• rs.initiate(config)
• rs.status()

Sharding Configuration in route server

• sh.status()
• sh.addShard ("rs0/machineip:27021")
• sh.addShard ("rs0/machineip:27024")
• sh.status()
• sh.enableSharding ("test")
• sh.shardCollection ("test.stud", {id: 1})
• sh.status()

Hope this will help :-)