How to change the port number of MongoDB replica set members
Introduction
Step 1 : Update the Port number in Mongodb.conf file in Primary, Slave1,Slave2 and Arbiter nodes.
New Port number
Slave1 Port number: 20002
Slave2 Port number: 20003
Arbiter Port number: 20004
Step 2 : Add the slave members in cluster with new port numbers
Step 3 : Initiate the replica set from the primary node.
Step 4 : Check the status
Step 5: Reconfigure the primary server
Step 6: Check the status of replication configuration
---------------------------------
Step 1 : -
Primary:-
[mdashok@MongoDB mongodb]$ pwd
/usr/server1/mongodb
[mdashok@MongoDB mongodb]$ cat mongodb.conf
systemLog:
destination: file
path: "/usr/server1/mongodb/log/mongodb.log"
logAppend: true
processManagement:
fork: true
net:
bindIp: 127.0.0.1,192.168.1.115
port: 30000
storage:
dbPath: "/usr/server1/mongodb/data"
replication:
replSetName: "OurReplica"
[mdashok@MongoDB mongodb]$
Slave 1 :
[mdashok@MongoDB mongodb]$ pwd
/usr/server2/mongodb
[mdashok@MongoDB mongodb]$ cat mongodb.conf
systemLog:
destination: file
path: "/usr/server2/mongodb/log/mongodb.log"
logAppend: true
processManagement:
fork: true
net:
bindIp: 127.0.0.1
port: 20002
storage:
dbPath: "/usr/server2/mongodb/data"
replication:
replSetName: "OurReplica"
[mdashok@MongoDB mongodb]$
Slave 2
[mdashok@MongoDB mongodb]$ pwd
/usr/server3/mongodb
[mdashok@MongoDB mongodb]$ cat mongodb.conf | grep port*
port: 20003
[mdashok@MongoDB mongodb]$
STEP 2:- Add the slave members nodes in primary replica set:
MongoDB Enterprise OurReplica:PRIMARY> rs.add("127.0.0.1:20002");
MongoDB Enterprise OurReplica:PRIMARY> rs.add("127.0.0.1:20003");
Arbiter node port number add:
MongoDB Enterprise OurReplica:PRIMARY> rs.add("127.0.0.1:20004");
STEP 3:
Initiate the Replication
MongoDB Enterprise OurReplica:OTHER> rs.initiate();
{
"operationTime" : Timestamp(1538391218, 1),
"ok" : 0,
"errmsg" : "already initialized",
"code" : 23,
"codeName" : "AlreadyInitialized",
"$clusterTime" : {
"clusterTime" : Timestamp(1538391218, 1),
"signature" : {
"hash" : BinData(0,"AAAAAAAAAAAAAAAAAAAAAAAAAAA="),
"keyId" : NumberLong(0)
}
}
}
STEP 4:
Let us check the status of replica:
MongoDB Enterprise OurReplica:OTHER> rs.status();
{
"operationTime" : Timestamp(1538391218, 1),
"ok" : 0,
"errmsg" : "Our replica set config is invalid or we are not a member of it",
"code" : 93,
"codeName" : "InvalidReplicaSetConfig",
"$clusterTime" : {
"clusterTime" : Timestamp(1538391218, 1),
"signature" : {
"hash" : BinData(0,"AAAAAAAAAAAAAAAAAAAAAAAAAAA="),
"keyId" : NumberLong(0)
}
}
The Error message says "Our replica set configure is invalid or we are not a member of it.
STEP 5: Let us re-configure the replication configuration .
a. MongoDB Enterprise OurReplica:OTHER> rsconf = rs.conf()
b. MongoDB Enterprise OurReplica:OTHER> rsconf.members = [{_id: 0, host: "localhost:30000"}]
[ { "_id" : 0, "host" : "localhost:30000" } ]
c. MongoDB Enterprise OurReplica:OTHER> rs.reconfig(rsconf, {force: true})
{
"ok" : 1,
"operationTime" : Timestamp(1538391218, 1),
"$clusterTime" : {
"clusterTime" : Timestamp(1538391218, 1),
"signature" : {
"hash" : BinData(0,"AAAAAAAAAAAAAAAAAAAAAAAAAAA="),
"keyId" : NumberLong(0)
}
}
}
d. Let us check status of Replication :
MongoDB Enterprise OurReplica:PRIMARY> rs.status();
{
"set" : "OurReplica",
"date" : ISODate("2020-08-25T22:56:15.651Z"),
"myState" : 1,
"term" : NumberLong(17),
"syncingTo" : "",
"syncSourceHost" : "",
"syncSourceId" : -1,
"heartbeatIntervalMillis" : NumberLong(2000),
"optimes" : {
"lastCommittedOpTime" : {
"ts" : Timestamp(1598396172, 1),
"t" : NumberLong(17)
},
"readConcernMajorityOpTime" : {
"ts" : Timestamp(1598396172, 1),
"t" : NumberLong(17)
},
"appliedOpTime" : {
"ts" : Timestamp(1598396172, 1),
"t" : NumberLong(17)
},
"durableOpTime" : {
"ts" : Timestamp(1598396172, 1),
"t" : NumberLong(17)
}
},
"lastStableCheckpointTimestamp" : Timestamp(1598396152, 1),
"members" : [
{
"_id" : 0,
"name" : "localhost:30000",
"health" : 1,
"state" : 1,
"stateStr" : "PRIMARY",
"uptime" : 1698,
"optime" : {
"ts" : Timestamp(1598396172, 1),
"t" : NumberLong(17)
},
"optimeDate" :
ISODate("2020-08-25T22:56:12Z"),
"syncingTo" : "",
"syncSourceHost" : "",
"syncSourceId" : -1,
"infoMessage" : "",
"electionTime" : Timestamp(1598395670, 1),
"electionDate" : ISODate("2020-08-25T22:47:50Z"),
"configVersion" : 16218,
"self" : true,
"lastHeartbeatMessage" : ""
},
{
"_id" : 1,
"name" : "127.0.0.1:20002",
"health" : 1,
"state" : 2,
"stateStr" : "SECONDARY",
"uptime" : 50,
"optime" : {
"ts" : Timestamp(1598396172, 1),
"t" : NumberLong(17)
},
"optimeDurable" : {
"ts" : Timestamp(1598396172, 1),
"t" : NumberLong(17)
},
"optimeDate" : ISODate("2020-08-25T22:56:12Z"),
"optimeDurableDate" : ISODate("2020-08-25T22:56:12Z"),
"lastHeartbeat" : ISODate("2020-08-25T22:56:15.615Z"),
"lastHeartbeatRecv" : ISODate("2020-08-25T22:56:15.640Z"),
"pingMs" : NumberLong(0),
"lastHeartbeatMessage" : "",
"syncingTo" : "localhost:30000",
"syncSourceHost" : "localhost:30000",
"syncSourceId" : 0,
"infoMessage" : "",
"configVersion" : 16218
},
{
"_id" : 2,
"name" : "127.0.0.1:20003",
"health" : 1,
"state" : 2,
"stateStr" : "SECONDARY",
"uptime" : 42,
"optime" : {
"ts" : Timestamp(1598396172, 1),
"t" : NumberLong(17)
},
"optimeDurable" : {
"ts" : Timestamp(1598396172, 1),
"t" : NumberLong(17)
},
"optimeDate" : ISODate("2020-08-25T22:56:12Z"),
"optimeDurableDate" : ISODate("2020-08-25T22:56:12Z"),
"lastHeartbeat" : ISODate("2020-08-25T22:56:15.620Z"),
"lastHeartbeatRecv" : ISODate("2020-08-25T22:56:14.364Z"),
"pingMs" : NumberLong(0),
"lastHeartbeatMessage" : "",
"syncingTo" : "127.0.0.1:20002",
"syncSourceHost" : "127.0.0.1:20002",
"syncSourceId" : 1,
"infoMessage" : "",
"configVersion" : 16218
}
],
"ok" : 1,
"operationTime" : Timestamp(1598396172, 1),
"$clusterTime" : {
"clusterTime" : Timestamp(1598396172, 1),
"signature" : {
"hash" : BinData(0,"AAAAAAAAAAAAAAAAAAAAAAAAAAA="),
"keyId" : NumberLong(0)
}
}
}
MongoDB Enterprise OurReplica: PRIMARY>
Now the port number 30000 is modified in the primary node.
Verify the Replication TimeStamp using printReplicationInfo Commands:
MongoDB Enterprise OurReplica:PRIMARY> rs.printReplicationInfo();
configured oplog size: 1436.840576171875MB
log length start to end: 61486517secs (17079.59hrs)
oplog first event time: Fri Sep 14 2018 12:52:15 GMT+0530 (IST)
oplog last event time: Wed Aug 26 2020 04:27:32 GMT+0530 (IST)
now: Wed Aug 26 2020 04:27:37 GMT+0530 (IST)
MongoDB Enterprise OurReplica:PRIMARY>
Here oplog size is 1436MB
Started first event time : Sep 14th 2018
Latest event time : Aug 26th 2020
Note: The Oplog (operations log) is a special capped collection that keeps a rolling record of all operations that modify the data stored in your databases. MongoDB applies database operations on the primary and then records the operations on the primary's oplog
e. Now Add the Arbiter Node with Primary: :
Note: Arbiters are MongoDB instances that are part of a replica set but do not hold data. Arbiters participate in elections in order to break ties. If a replica set has an even number of members then you can add an arbiter
STEP 6: Let us check the configuration of the replica set after adding Arbiter node
MongoDB Enterprise OurReplica:PRIMARY> rs.conf()
{
"_id" : "OurReplica",
"version" : 16219,
"protocolVersion" : NumberLong(1),
"writeConcernMajorityJournalDefault" : true,
"members" : [
{
"_id" : 0,
"host" : "localhost:30000",
"arbiterOnly" : false,
"buildIndexes" : true,
"hidden" : false,
"priority" : 1,
"tags" : {
},
"slaveDelay" : NumberLong(0),
"votes" : 1
},
{
"_id" : 1,
"host" : "127.0.0.1:20002",
"arbiterOnly" : false,
"buildIndexes" : true,
"hidden" : false,
"priority" : 1,
"tags" : {
},
"slaveDelay" : NumberLong(0),
"votes" : 1
},
{
"_id" : 2,
"host" : "127.0.0.1:20003",
"arbiterOnly" : false,
"buildIndexes" : true,
"hidden" : false,
"priority" : 1,
"tags" : {
},
"slaveDelay" : NumberLong(0),
"votes" : 1
},
{
"_id" : 3,
"host" : "127.0.0.1:20004",
"arbiterOnly" : true,
"buildIndexes" : true,
"hidden" : false,
"priority" : 0,
"tags" : {
},
"slaveDelay" : NumberLong(0),
"votes" : 1
}
],
"settings" : {
"chainingAllowed" : true,
"heartbeatIntervalMillis" : 2000,
"heartbeatTimeoutSecs" : 10,
"electionTimeoutMillis" : 10000,
"catchUpTimeoutMillis" : -1,
"catchUpTakeoverDelayMillis" : 30000,
"getLastErrorModes" : {
},
"getLastErrorDefaults" : {
"w" : 1,
"wtimeout" : 0
},
"replicaSetId" : ObjectId("5b9b61a67b1454a13fc7610a")
}
}
MongoDB Enterprise OurReplica:PRIMARY>
Final check : A)
MongoDB Enterprise OurReplica:PRIMARY> rs.isMaster();
{
"hosts" : [
"localhost:30000",
"127.0.0.1:20002",
"127.0.0.1:20003"
],
"arbiters" : [
"127.0.0.1:20004"
],
"setName" : "OurReplica",
"setVersion" : 16219,
"ismaster" : true,
"secondary" : false,
"primary" : "localhost:30000",
"me" : "localhost:30000",
"electionId" : ObjectId("7fffffff0000000000000012"),
"lastWrite" : {
"opTime" : {
"ts" : Timestamp(1598461787, 1),
"t" : NumberLong(18)
},
"lastWriteDate" : ISODate("2020-08-26T17:09:47Z"),
"majorityOpTime" : {
"ts" : Timestamp(1598461787, 1),
"t" : NumberLong(18)
},
"majorityWriteDate" : ISODate("2020-08-26T17:09:47Z")
},
"maxBsonObjectSize" : 16777216,
"maxMessageSizeBytes" : 48000000,
"maxWriteBatchSize" : 100000,
"localTime" : ISODate("2020-08-26T17:09:49.132Z"),
"logicalSessionTimeoutMinutes" : 30,
"minWireVersion" : 0,
"maxWireVersion" : 7,
"readOnly" : false,
"ok" : 1,
"operationTime" : Timestamp(1598461787, 1),
"$clusterTime" : {
"clusterTime" : Timestamp(1598461787, 1),
"signature" : {
"hash" : BinData(0,"AAAAAAAAAAAAAAAAAAAAAAAAAAA="),
"keyId" : NumberLong(0)
}
}
}
MongoDB Enterprise OurReplica:PRIMARY>
