Wednesday, August 26, 2020

MongoDB Replica set port number change

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

Primary Server Port number: 30000

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]$

Arbiter :

[mdashok@MongoDB mongodb]$ pwd

/usr/server4/mongodb

[mdashok@MongoDB mongodb]$ cat mongodb.conf

systemLog:

destination: file

path: "/usr/server4/mongodb/log/mongodb.log"

logAppend: true

processManagement:

fork: true

net:

bindIp: 127.0.0.1

port: 20004

storage:

dbPath: "/usr/server4/mongodb/data"

replication:

replSetName: "OurReplica"

[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)

}

Since the Replication is using the old port number, we have to reconfigure the settings

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: :

Since we have two slave members in our replica set then we should have one arbiter node to participate in the election

MongoDB Enterprise OurReplica:PRIMARY> rs.addArb("127.0.0.1:20004");

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>

[ _id0 -> Primary node , _id1 -> Slave node 1, _id2 -> Skave node 2 , _id3 -> arbiter node ]

Let us check the database status in primary :

MongoDB Enterprise OurReplica:PRIMARY> show dbs;

AshokDB 0.000GB

FOver_Test 0.000GB

RepDB 0.000GB

admin 0.000GB

config 0.000GB

local 0.001GB

MongoDB Enterprise OurReplica:PRIMARY>

[mdashok@MongoDB mongodb]$ mongo --port 20002

MongoDB Enterprise OurReplica:SECONDARY> rs.slaveOk();

MongoDB Enterprise OurReplica:SECONDARY> show dbs;

AshokDB 0.000GB

FOver_Test 0.000GB

RepDB 0.000GB

admin 0.000GB

config 0.000GB

local 0.001GB

MongoDB Enterprise OurReplica:SECONDARY>

[mdashok@MongoDB mongodb]$ mongo --port 20003

MongoDB Enterprise OurReplica:SECONDARY> rs.slaveOk();

MongoDB Enterprise OurReplica:SECONDARY> show dbs;

AshokDB 0.000GB

FOver_Test 0.000GB

RepDB 0.000GB

admin 0.000GB

config 0.000GB

local 0.000GB

MongoDB Enterprise OurReplica:SECONDARY>

Tuesday, August 25, 2020

MongoDB Replication Configuration step by step on RHEL 6.5 64Bit OS

MongoDB Replication

Replica-Set

A Replica set is a group of servers with one primary, the server taking client requests, and multiple secondary's, servers that keep copies of the primary's data.

If the primary crashes, the secondaries can elect a new primary from amongst themselves.

if your are using replication and a server goes down, you can still access your data from the other servers in the set. If the data on a server is damaged or inaccessible, you can make a copy of the data from one the other members of the set.

Replication Configuration:

set the environment variable for mongodb services in root user.

[root@mongodb4 ~]# cat .bash_profile

# .bash_profile

# Get the aliases and functions

if [ -f ~/.bashrc ]; then

. ~/.bashrc

# User specific environment and startup programs

PATH=$PATH:$HOME/bin

export PATH

export JAVA_HOME=/opt/jdk1.8.0_162

export JRE_HOME=/opt/jdk1.8.0_162/jre

export PATH=$PATH:/opt/jdk1.8.0_162/bin:/opt/jdk1.8.0_162/jre/bin

export MONGODB_HOME=/yis/mdashok/mongodb_home/mongodb-linux-x86_64-enterprise-rhel62-4.0.0

export PATH=$PATH:$MONGODB_HOME/bin

[root@mongodb4 ~]#

Create directory

$mkdir -p /usr/server1/mongodb

$mkdir -p /usr/server2/mongodb

$mkdir -p /usr/server3/mongodb

$chmod -R 777 /usr/server1

$chmod -R 777 /usr/server2

$chmod -R 777 /usr/server3

Create data and log directories in server1,2 and 3 folders.

$cd /usr/server1/mongodb

mkdir data log

$cd /usr/server2/mongodb

mkdir data log

$cd /usr/server3/mongodb

mkdir data log

Starting Mongod service in Server 1 : Primary Server:

[root@mongodb4 /]# more /usr/server1/mongodb/mongodb.conf

systemLog:

destination: file

path: "/usr/server1/mongodb/log/mongodb.log"

logAppend: true

processManagement:

fork: true

net:

bindIp: 127.0.0.1

port: 6666

storage:

dbPath: "/usr/server1/mongodb/data"

replication:

replSetName: "OurReplica"

[root@mongodb4 /]#

[root@nosqlDB mongodb]# mongod -f mongodb.conf

2018-09-14T11:35:21.149+0530 I CONTROL [main] Automatically disabling TLS 1.0, to force-enable TLS 1.0 specify --sslDisabledProtocols 'none'

about to fork child process, waiting until server is ready for connections.

forked process: 2607

child process started successfully, parent exiting

Starting Mongod service in Server 2: Secondary Server

[root@nosqlDB mongodb]# pwd

/usr/server2/mongodb

[root@nosqlDB mongodb]#

[root@nosqlDB 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: 7777

storage:

dbPath: "/usr/server2/mongodb/data"

replication:

replSetName: "OurReplica"

[root@nosqlDB mongodb]#

[root@nosqlDB mongodb]# date

Fri Sep 14 11:39:28 IST 2018

[root@nosqlDB mongodb]# pwd

/usr/server2/mongodb

[root@nosqlDB mongodb]# ls -ltr

total 16

drwxr-xr-x. 2 mdashok mongodb 4096 Aug 28 11:59 data

drwxr-xr-x. 2 mdashok mongodb 4096 Aug 28 11:59 log

-rwxrwxrwx. 1 mdashok mongodb 303 Aug 28 14:36 mongodb.conf.old

-rwxrwxrwx. 1 mdashok mongodb 264 Sep 14 11:34 mongodb.conf

[root@nosqlDB mongodb]# mongod -f mongodb.conf

2018-09-14T11:39:33.403+0530 I CONTROL [main] Automatically disabling TLS 1.0, to force-enable TLS 1.0 specify --sslDisabledProtocols 'none'

about to fork child process, waiting until server is ready for connections.

forked process: 2686

child process started successfully, parent exiting

[root@nosqlDB mongodb]#

Starting Mongod service in Server 3 (Arbiter) #

[root@nosqlDB mongodb]# date

Fri Sep 14 11:42:11 IST 2018

[root@nosqlDB mongodb]# pwd

/usr/server3/mongodb

[root@nosqlDB mongodb]# ls -tlr

total 16

drwxr-xr-x. 2 mdashok mongodb 4096 Aug 28 12:00 data

drwxr-xr-x. 2 mdashok mongodb 4096 Aug 28 12:00 log

-rwxrwxrwx. 1 mdashok mongodb 303 Aug 28 14:36 mongodb.conf.bkp

-rwxrwxrwx. 1 mdashok mongodb 265 Sep 14 11:34 mongodb.conf

[root@nosqlDB mongodb]# mongod -f mongodb.conf

2018-09-14T11:42:17.453+0530 I CONTROL [main] Automatically disabling TLS 1.0, to force-enable TLS 1.0 specify --sslDisabledProtocols 'none'

about to fork child process, waiting until server is ready for connections.

forked process: 2738

child process started successfully, parent exiting

[root@nosqlDB mongodb]#

Connecting to Server 1

[root@nosqlDB ~]# date

Fri Sep 14 11:44:57 IST 2018

[root@nosqlDB ~]# cd /usr/server1/mongodb/

[root@nosqlDB mongodb]# pwd

/usr/server1/mongodb

[root@nosqlDB mongodb]# mongo --port 6666

MongoDB shell version v4.0.0

connecting to: mongodb://127.0.0.1:6666/

MongoDB server version: 4.0.0

Server has startup warnings:

2018-09-14T11:35:21.161+0530 I STORAGE [initandlisten]

2018-09-14T11:35:21.161+0530 I STORAGE [initandlisten] ** WARNING: Using the XFS filesystem is strongly recommended with the WiredTiger storage engine

2018-09-14T11:35:21.161+0530 I STORAGE [initandlisten] ** See http://dochub.mongodb.org/core/prodnotes-filesystem

2018-09-14T11:35:21.965+0530 I CONTROL [initandlisten]

2018-09-14T11:35:21.965+0530 I CONTROL [initandlisten] ** WARNING: Access control is not enabled for the database.

2018-09-14T11:35:21.965+0530 I CONTROL [initandlisten] ** Read and write access to data and configuration is unrestricted.

2018-09-14T11:35:21.965+0530 I CONTROL [initandlisten] ** WARNING: You are running this process as the root user, which is not recommended.

2018-09-14T11:35:21.965+0530 I CONTROL [initandlisten]

2018-09-14T11:35:21.966+0530 I CONTROL [initandlisten]

2018-09-14T11:35:21.966+0530 I CONTROL [initandlisten] ** WARNING: /sys/kernel/mm/transparent_hugepage/enabled is 'always'.

2018-09-14T11:35:21.966+0530 I CONTROL [initandlisten] ** We suggest setting it to 'never'

2018-09-14T11:35:21.966+0530 I CONTROL [initandlisten]

2018-09-14T11:35:21.966+0530 I CONTROL [initandlisten] ** WARNING: /sys/kernel/mm/transparent_hugepage/defrag is 'always'.

2018-09-14T11:35:21.966+0530 I CONTROL [initandlisten] ** We suggest setting it to 'never'

2018-09-14T11:35:21.966+0530 I CONTROL [initandlisten]

MongoDB Enterprise >

Connecting to Server 2

[root@nosqlDB mongodb]# date

Fri Sep 14 11:47:14 IST 2018

[root@nosqlDB mongodb]# pwd

/usr/server2/mongodb

[root@nosqlDB mongodb]# mongo --port 7777

MongoDB shell version v4.0.0

connecting to: mongodb://127.0.0.1:7777/

MongoDB server version: 4.0.0

Server has startup warnings:

2018-09-14T11:39:33.439+0530 I STORAGE [initandlisten]

2018-09-14T11:39:33.439+0530 I STORAGE [initandlisten] ** WARNING: Using the XFS filesystem is strongly recommended with the WiredTiger storage engine

2018-09-14T11:39:33.439+0530 I STORAGE [initandlisten] ** See http://dochub.mongodb.org/core/prodnotes-filesystem

2018-09-14T11:39:34.302+0530 I CONTROL [initandlisten]

2018-09-14T11:39:34.302+0530 I CONTROL [initandlisten] ** WARNING: Access control is not enabled for the database.

2018-09-14T11:39:34.302+0530 I CONTROL [initandlisten] ** Read and write access to data and configuration is unrestricted.

2018-09-14T11:39:34.302+0530 I CONTROL [initandlisten] ** WARNING: You are running this process as the root user, which is not recommended.

2018-09-14T11:39:34.302+0530 I CONTROL [initandlisten]

2018-09-14T11:39:34.303+0530 I CONTROL [initandlisten]

2018-09-14T11:39:34.303+0530 I CONTROL [initandlisten] ** WARNING: /sys/kernel/mm/transparent_hugepage/enabled is 'always'.

2018-09-14T11:39:34.303+0530 I CONTROL [initandlisten] ** We suggest setting it to 'never'

2018-09-14T11:39:34.303+0530 I CONTROL [initandlisten]

2018-09-14T11:39:34.303+0530 I CONTROL [initandlisten] ** WARNING: /sys/kernel/mm/transparent_hugepage/defrag is 'always'.

2018-09-14T11:39:34.303+0530 I CONTROL [initandlisten] ** We suggest setting it to 'never'

2018-09-14T11:39:34.303+0530 I CONTROL [initandlisten]

MongoDB Enterprise >

Connecting to Server 3

[root@nosqlDB mongodb]# date

Fri Sep 14 11:49:05 IST 2018

[root@nosqlDB mongodb]# pwd

/usr/server3/mongodb

[root@nosqlDB mongodb]# mongo --port 8888

MongoDB shell version v4.0.0

connecting to: mongodb://127.0.0.1:8888/

MongoDB server version: 4.0.0

Server has startup warnings:

2018-09-14T11:42:17.473+0530 I STORAGE [initandlisten]

2018-09-14T11:42:17.473+0530 I STORAGE [initandlisten] ** WARNING: Using the XFS filesystem is strongly recommended with the WiredTiger storage engine

2018-09-14T11:42:17.473+0530 I STORAGE [initandlisten] ** See http://dochub.mongodb.org/core/prodnotes-filesystem

2018-09-14T11:42:18.284+0530 I CONTROL [initandlisten]

2018-09-14T11:42:18.284+0530 I CONTROL [initandlisten] ** WARNING: Access control is not enabled for the database.

2018-09-14T11:42:18.284+0530 I CONTROL [initandlisten] ** Read and write access to data and configuration is unrestricted.

2018-09-14T11:42:18.284+0530 I CONTROL [initandlisten] ** WARNING: You are running this process as the root user, which is not recommended.

2018-09-14T11:42:18.284+0530 I CONTROL [initandlisten]

2018-09-14T11:42:18.284+0530 I CONTROL [initandlisten] ** WARNING: /sys/kernel/mm/transparent_hugepage/enabled is 'always'.

2018-09-14T11:42:18.284+0530 I CONTROL [initandlisten] ** We suggest setting it to 'never'

2018-09-14T11:42:18.284+0530 I CONTROL [initandlisten]

2018-09-14T11:42:18.284+0530 I CONTROL [initandlisten] ** WARNING: /sys/kernel/mm/transparent_hugepage/defrag is 'always'.

2018-09-14T11:42:18.284+0530 I CONTROL [initandlisten] ** We suggest setting it to 'never'

2018-09-14T11:42:18.284+0530 I CONTROL [initandlisten]

MongoDB Enterprise >

Initiate Server1 as Primary Server

MongoDB Enterprise > db.version();

4.0.0

MongoDB Enterprise >

MongoDB Enterprise > rs.initiate()

{

"info2" : "no configuration specified. Using a default configuration for the set",

"me" : "127.0.0.1:6666",

"ok" : 1,

"operationTime" : Timestamp(1536909735, 1),

"$clusterTime" : {

"clusterTime" : Timestamp(1536909735, 1),

"signature" : {

"hash" : BinData(0,"AAAAAAAAAAAAAAAAAAAAAAAAAAA="),

"keyId" : NumberLong(0)

}

MongoDB Enterprise OurReplica:OTHER>

Default it is connected to local host : 6666. i.e. primary server.

Here we can see replication set name: OurReplica .

OTHER: Because still it is not aware that is belong to which database.

MongoDB Enterprise OurReplica:OTHER> show dbs

admin 0.000GB

config 0.000GB

local 0.000GB

MongoDB Enterprise OurReplica:PRIMARY>

Check the current db connected from Primary Server

MongoDB Enterprise OurReplica:PRIMARY> db

test

MongoDB Enterprise OurReplica:PRIMARY>

Verify the Replication Status from Primary Server

MongoDB Enterprise OurReplica:PRIMARY> rs.status();

{

"set" : "OurReplica",

"date" : ISODate("2018-09-14T07:24:58.030Z"),

"myState" : 1,

"term" : NumberLong(1),

"syncingTo" : "",

"syncSourceHost" : "",

"syncSourceId" : -1,

"heartbeatIntervalMillis" : NumberLong(2000),

"optimes" : {

"lastCommittedOpTime" : {

"ts" : Timestamp(1536909896, 1),

"t" : NumberLong(1)

"readConcernMajorityOpTime" : {

"ts" : Timestamp(1536909896, 1),

"t" : NumberLong(1)

"appliedOpTime" : {

"ts" : Timestamp(1536909896, 1),

"t" : NumberLong(1)

"durableOpTime" : {

"ts" : Timestamp(1536909896, 1),

"t" : NumberLong(1)

}

"lastStableCheckpointTimestamp" : Timestamp(1536909856, 1),

"members" : [

{

"_id" : 0,

"name" : "127.0.0.1:6666",

"health" : 1,

"state" : 1,

"stateStr" : "PRIMARY",

"uptime" : 4777,

"optime" : {

"ts" : Timestamp(1536909896, 1),

"t" : NumberLong(1)

"optimeDate" : ISODate("2018-09-14T07:24:56Z"),

"syncingTo" : "",

"syncSourceHost" : "",

"syncSourceId" : -1,

"infoMessage" : "",

"electionTime" : Timestamp(1536909735, 2),

"electionDate" : ISODate("2018-09-14T07:22:15Z"),

"configVersion" : 1,

"self" : true,

"lastHeartbeatMessage" : ""

}

"ok" : 1,

"operationTime" : Timestamp(1536909896, 1),

"$clusterTime" : {

"clusterTime" : Timestamp(1536909896, 1),

"signature" : {

"hash" : BinData(0,"AAAAAAAAAAAAAAAAAAAAAAAAAAA="),

"keyId" : NumberLong(0)

}

MongoDB Enterprise OurReplica:PRIMARY>

Verify the Replication Configuration from Primary Server

MongoDB Enterprise OurReplica:PRIMARY> rs.conf();

{

"_id" : "OurReplica",

"version" : 1,

"protocolVersion" : NumberLong(1),

"writeConcernMajorityJournalDefault" : true,

"members" : [

{

"_id" : 0,

"host" : "127.0.0.1:6666",

"arbiterOnly" : false,

"buildIndexes" : true,

"hidden" : false,

"priority" : 1,

"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>

host" : "127.0.0.1:6666" -> we are using localhost for replication. If we go for real configuration then server name should be different and port number may/may not be same.

arbiterOnly" : false -> No. It is not arbiter.

members: We have only 1 member (6666)

Add first Secondary Server from Primary Server

MongoDB Enterprise OurReplica:PRIMARY> rs.add("127.0.0.1:7777");

{

"ok" : 1,

"operationTime" : Timestamp(1536910836, 2),

"$clusterTime" : {

"clusterTime" : Timestamp(1536910836, 2),

"signature" : {

"hash" : BinData(0,"AAAAAAAAAAAAAAAAAAAAAAAAAAA="),

"keyId" : NumberLong(0)

}

MongoDB Enterprise OurReplica:PRIMARY>

Add second Secondary Server2 from Primary Server

rs.add("127.0.0.1:8888");

MongoDB Enterprise OurReplica:PRIMARY> rs.add("127.0.0.1:8888");

{

"ok" : 1,

"operationTime" : Timestamp(1536911008, 1),

"$clusterTime" : {

"clusterTime" : Timestamp(1536911008, 1),

"signature" : {

"hash" : BinData(0,"AAAAAAAAAAAAAAAAAAAAAAAAAAA="),

"keyId" : NumberLong(0)

}

MongoDB Enterprise OurReplica:PRIMARY>

Verify the Replication configuration from primary server

our Replica: PRIMARY>rs.conf()

MongoDB Enterprise OurReplica:PRIMARY> rs.conf()

{

"_id" : "OurReplica",

"version" : 3,

"protocolVersion" : NumberLong(1),

"writeConcernMajorityJournalDefault" : true,

"members" : [

{

"_id" : 0,

"host" : "127.0.0.1:6666",

"arbiterOnly" : false,

"buildIndexes" : true,

"hidden" : false,

"priority" : 1,

"tags" : {

"slaveDelay" : NumberLong(0),

"votes" : 1

{

"_id" : 1,

"host" : "127.0.0.1:7777",

"arbiterOnly" : false,

"buildIndexes" : true,

"hidden" : false,

"priority" : 1,

"tags" : {

"slaveDelay" : NumberLong(0),

"votes" : 1

{

"_id" : 2,

"host" : "127.0.0.1:8888",

"arbiterOnly" : false,

"buildIndexes" : true,

"hidden" : false,

"priority" : 1,

"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>

Verify the replication status from primary server

MongoDB Enterprise OurReplica:PRIMARY> rs.status();

{

"set" : "OurReplica",

"date" : ISODate("2018-09-14T08:00:47.253Z"),

"myState" : 1,

"term" : NumberLong(1),

"syncingTo" : "",

"syncSourceHost" : "",

"syncSourceId" : -1,

"heartbeatIntervalMillis" : NumberLong(2000),

"optimes" : {

"lastCommittedOpTime" : {

"ts" : Timestamp(1536912046, 1),

"t" : NumberLong(1)

"readConcernMajorityOpTime" : {

"ts" : Timestamp(1536912046, 1),

"t" : NumberLong(1)

"appliedOpTime" : {

"ts" : Timestamp(1536912046, 1),

"t" : NumberLong(1)

"durableOpTime" : {

"ts" : Timestamp(1536912046, 1),

"t" : NumberLong(1)

}

"lastStableCheckpointTimestamp" : Timestamp(1536912016, 1),

"members" : [

{

"_id" : 0,

"name" : "127.0.0.1:6666",

"health" : 1,

"state" : 1,

"stateStr" : "PRIMARY",

"uptime" : 6926,

"optime" : {

"ts" : Timestamp(1536912046, 1),

"t" : NumberLong(1)

"optimeDate" : ISODate("2018-09-14T08:00:46Z"),

"syncingTo" : "",

"syncSourceHost" : "",

"syncSourceId" : -1,

"infoMessage" : "",

"electionTime" : Timestamp(1536909735, 2),

"electionDate" : ISODate("2018-09-14T07:22:15Z"),

"configVersion" : 3,

"self" : true,

"lastHeartbeatMessage" : ""

{

"_id" : 1,

"name" : "127.0.0.1:7777",

"health" : 1,

"state" : 2,

"stateStr" : "SECONDARY",

"uptime" : 1210,

"optime" : {

"ts" : Timestamp(1536912046, 1),

"t" : NumberLong(1)

"optimeDurable" : {

"ts" : Timestamp(1536912046, 1),

"t" : NumberLong(1)

"optimeDate" : ISODate("2018-09-14T08:00:46Z"),

"optimeDurableDate" : ISODate("2018-09-14T08:00:46Z"),

"lastHeartbeat" : ISODate("2018-09-14T08:00:46.923Z"),

"lastHeartbeatRecv" : ISODate("2018-09-14T08:00:45.986Z"),

"pingMs" : NumberLong(0),

"lastHeartbeatMessage" : "",

"syncingTo" : "127.0.0.1:8888",

"syncSourceHost" : "127.0.0.1:8888",

"syncSourceId" : 2,

"infoMessage" : "",

"configVersion" : 3

{

"_id" : 2,

"name" : "127.0.0.1:8888",

"health" : 1,

"state" : 2,

"stateStr" : "SECONDARY",

"uptime" : 1038,

"optime" : {

"ts" : Timestamp(1536912046, 1),

"t" : NumberLong(1)

"optimeDurable" : {

"ts" : Timestamp(1536912046, 1),

"t" : NumberLong(1)

"optimeDate" : ISODate("2018-09-14T08:00:46Z"),

"optimeDurableDate" : ISODate("2018-09-14T08:00:46Z"),

"lastHeartbeat" : ISODate("2018-09-14T08:00:46.923Z"),

"lastHeartbeatRecv" : ISODate("2018-09-14T08:00:45.308Z"),

"pingMs" : NumberLong(0),

"lastHeartbeatMessage" : "",

"syncingTo" : "127.0.0.1:6666",

"syncSourceHost" : "127.0.0.1:6666",

"syncSourceId" : 0,

"infoMessage" : "",

"configVersion" : 3

}

"ok" : 1,

"operationTime" : Timestamp(1536912046, 1),

"$clusterTime" : {

"clusterTime" : Timestamp(1536912046, 1),

"signature" : {

"hash" : BinData(0,"AAAAAAAAAAAAAAAAAAAAAAAAAAA="),

"keyId" : NumberLong(0)

}

MongoDB Enterprise OurReplica:PRIMARY>

Verify the Replication Status from Primary Server

MongoDB Enterprise OurReplica:PRIMARY> rs.status();

{

"set" : "OurReplica",

"date" : ISODate("2018-09-14T08:00:47.253Z"),

"myState" : 1,

"term" : NumberLong(1),

"syncingTo" : "",

"syncSourceHost" : "",

"syncSourceId" : -1,

"heartbeatIntervalMillis" : NumberLong(2000),

"optimes" : {

"lastCommittedOpTime" : {

"ts" : Timestamp(1536912046, 1),

"t" : NumberLong(1)

"readConcernMajorityOpTime" : {

"ts" : Timestamp(1536912046, 1),

"t" : NumberLong(1)

"appliedOpTime" : {

"ts" : Timestamp(1536912046, 1),

"t" : NumberLong(1)

"durableOpTime" : {

"ts" : Timestamp(1536912046, 1),

"t" : NumberLong(1)

}

"lastStableCheckpointTimestamp" : Timestamp(1536912016, 1),

"members" : [

{

"_id" : 0,

"name" : "127.0.0.1:6666",

"health" : 1,

"state" : 1,

"stateStr" : "PRIMARY",

"uptime" : 6926,

"optime" : {

"ts" : Timestamp(1536912046, 1),

"t" : NumberLong(1)

"optimeDate" : ISODate("2018-09-14T08:00:46Z"),

"syncingTo" : "",

"syncSourceHost" : "",

"syncSourceId" : -1,

"infoMessage" : "",

"electionTime" : Timestamp(1536909735, 2),

"electionDate" : ISODate("2018-09-14T07:22:15Z"),

"configVersion" : 3,

"self" : true,

"lastHeartbeatMessage" : ""

{

"_id" : 1,

"name" : "127.0.0.1:7777",

"health" : 1,

"state" : 2,

"stateStr" : "SECONDARY",

"uptime" : 1210,

"optime" : {

"ts" : Timestamp(1536912046, 1),

"t" : NumberLong(1)

"optimeDurable" : {

"ts" : Timestamp(1536912046, 1),

"t" : NumberLong(1)

"optimeDate" : ISODate("2018-09-14T08:00:46Z"),

"optimeDurableDate" : ISODate("2018-09-14T08:00:46Z"),

"lastHeartbeat" : ISODate("2018-09-14T08:00:46.923Z"),

"lastHeartbeatRecv" : ISODate("2018-09-14T08:00:45.986Z"),

"pingMs" : NumberLong(0),

"lastHeartbeatMessage" : "",

"syncingTo" : "127.0.0.1:8888",

"syncSourceHost" : "127.0.0.1:8888",

"syncSourceId" : 2,

"infoMessage" : "",

"configVersion" : 3

{

"_id" : 2,

"name" : "127.0.0.1:8888",

"health" : 1,

"state" : 2,

"stateStr" : "SECONDARY",

"uptime" : 1038,

"optime" : {

"ts" : Timestamp(1536912046, 1),

"t" : NumberLong(1)

"optimeDurable" : {

"ts" : Timestamp(1536912046, 1),

"t" : NumberLong(1)

"optimeDate" : ISODate("2018-09-14T08:00:46Z"),

"optimeDurableDate" : ISODate("2018-09-14T08:00:46Z"),

"lastHeartbeat" : ISODate("2018-09-14T08:00:46.923Z"),

"lastHeartbeatRecv" : ISODate("2018-09-14T08:00:45.308Z"),

"pingMs" : NumberLong(0),

"lastHeartbeatMessage" : "",

"syncingTo" : "127.0.0.1:6666",

"syncSourceHost" : "127.0.0.1:6666",

"syncSourceId" : 0,

"infoMessage" : "",

"configVersion" : 3

}

"ok" : 1,

"operationTime" : Timestamp(1536912046, 1),

"$clusterTime" : {

"clusterTime" : Timestamp(1536912046, 1),

"signature" : {

"hash" : BinData(0,"AAAAAAAAAAAAAAAAAAAAAAAAAAA="),

"keyId" : NumberLong(0)

}

MongoDB Enterprise OurReplica:PRIMARY>

Remove a Secondary Server from Primary Server

MongoDB Enterprise OurReplica:PRIMARY> rs.remove("127.0.0.1:8888");

{

"ok" : 1,

"operationTime" : Timestamp(1536912221, 1),

"$clusterTime" : {

"clusterTime" : Timestamp(1536912221, 1),

"signature" : {

"hash" : BinData(0,"AAAAAAAAAAAAAAAAAAAAAAAAAAA="),

"keyId" : NumberLong(0)

}

MongoDB Enterprise OurReplica:PRIMARY>

Verify the Replication configuration from primary server

MongoDB Enterprise OurReplica:PRIMARY> rs.conf();

{

"_id" : "OurReplica",

"version" : 4,

"protocolVersion" : NumberLong(1),

"writeConcernMajorityJournalDefault" : true,

"members" : [

{

"_id" : 0,

"host" : "127.0.0.1:6666",

"arbiterOnly" : false,

"buildIndexes" : true,

"hidden" : false,

"priority" : 1,

"tags" : {

"slaveDelay" : NumberLong(0),

"votes" : 1

{

"_id" : 1,

"host" : "127.0.0.1:7777",

"arbiterOnly" : false,

"buildIndexes" : true,

"hidden" : false,

"priority" : 1,

"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>

Verify the Replication Status from Primary Server

MongoDB Enterprise OurReplica:PRIMARY> rs.status();

{

"set" : "OurReplica",

"date" : ISODate("2018-09-14T08:04:56.627Z"),

"myState" : 1,

"term" : NumberLong(1),

"syncingTo" : "",

"syncSourceHost" : "",

"syncSourceId" : -1,

"heartbeatIntervalMillis" : NumberLong(2000),

"optimes" : {

"lastCommittedOpTime" : {

"ts" : Timestamp(1536912296, 1),

"t" : NumberLong(1)

"readConcernMajorityOpTime" : {

"ts" : Timestamp(1536912296, 1),

"t" : NumberLong(1)

"appliedOpTime" : {

"ts" : Timestamp(1536912296, 1),

"t" : NumberLong(1)

"durableOpTime" : {

"ts" : Timestamp(1536912296, 1),

"t" : NumberLong(1)

}

"lastStableCheckpointTimestamp" : Timestamp(1536912256, 1),

"members" : [

{

"_id" : 0,

"name" : "127.0.0.1:6666",

"health" : 1,

"state" : 1,

"stateStr" : "PRIMARY",

"uptime" : 7175,

"optime" : {

"ts" : Timestamp(1536912296, 1),

"t" : NumberLong(1)

"optimeDate" : ISODate("2018-09-14T08:04:56Z"),

"syncingTo" : "",

"syncSourceHost" : "",

"syncSourceId" : -1,

"infoMessage" : "",

"electionTime" : Timestamp(1536909735, 2),

"electionDate" : ISODate("2018-09-14T07:22:15Z"),

"configVersion" : 4,

"self" : true,

"lastHeartbeatMessage" : ""

{

"_id" : 1,

"name" : "127.0.0.1:7777",

"health" : 1,

"state" : 2,

"stateStr" : "SECONDARY",

"uptime" : 1460,

"optime" : {

"ts" : Timestamp(1536912286, 1),

"t" : NumberLong(1)

"optimeDurable" : {

"ts" : Timestamp(1536912286, 1),

"t" : NumberLong(1)

"optimeDate" : ISODate("2018-09-14T08:04:46Z"),

"optimeDurableDate" : ISODate("2018-09-14T08:04:46Z"),

"lastHeartbeat" : ISODate("2018-09-14T08:04:55.421Z"),

"lastHeartbeatRecv" : ISODate("2018-09-14T08:04:54.922Z"),

"pingMs" : NumberLong(0),

"lastHeartbeatMessage" : "",

"syncingTo" : "127.0.0.1:6666",

"syncSourceHost" : "127.0.0.1:6666",

"syncSourceId" : 0,

"infoMessage" : "",

"configVersion" : 4

}

"ok" : 1,

"operationTime" : Timestamp(1536912296, 1),

"$clusterTime" : {

"clusterTime" : Timestamp(1536912296, 1),

"signature" : {

"hash" : BinData(0,"AAAAAAAAAAAAAAAAAAAAAAAAAAA="),

"keyId" : NumberLong(0)

}

MongoDB Enterprise OurReplica:PRIMARY>

Add Arbiter Server from Primary Server

MongoDB Enterprise OurReplica:PRIMARY> rs.addArb("127.0.0.1:8888");

{

"ok" : 1,

"operationTime" : Timestamp(1536912367, 1),

"$clusterTime" : {

"clusterTime" : Timestamp(1536912367, 1),

"signature" : {

"hash" : BinData(0,"AAAAAAAAAAAAAAAAAAAAAAAAAAA="),

"keyId" : NumberLong(0)

}

MongoDB Enterprise OurReplica:PRIMARY>

Verify the Replication configuration from primary server

MongoDB Enterprise OurReplica:PRIMARY> rs.conf();

{

"_id" : "OurReplica",

"version" : 5,

"protocolVersion" : NumberLong(1),

"writeConcernMajorityJournalDefault" : true,

"members" : [

{

"_id" : 0,

"host" : "127.0.0.1:6666",

"arbiterOnly" : false,

"buildIndexes" : true,

"hidden" : false,

"priority" : 1,

"tags" : {

"slaveDelay" : NumberLong(0),

"votes" : 1

{

"_id" : 1,

"host" : "127.0.0.1:7777",

"arbiterOnly" : false,

"buildIndexes" : true,

"hidden" : false,

"priority" : 1,

"tags" : {

"slaveDelay" : NumberLong(0),

"votes" : 1

{

"_id" : 2,

"host" : "127.0.0.1:8888",

"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>

Verify the Replication Status from Primary Server

MongoDB Enterprise OurReplica:PRIMARY> rs.status();

{

"set" : "OurReplica",

"date" : ISODate("2018-09-14T08:08:21.923Z"),

"myState" : 1,

"term" : NumberLong(1),

"syncingTo" : "",

"syncSourceHost" : "",

"syncSourceId" : -1,

"heartbeatIntervalMillis" : NumberLong(2000),

"optimes" : {

"lastCommittedOpTime" : {

"ts" : Timestamp(1536912496, 1),

"t" : NumberLong(1)

"readConcernMajorityOpTime" : {

"ts" : Timestamp(1536912496, 1),

"t" : NumberLong(1)

"appliedOpTime" : {

"ts" : Timestamp(1536912496, 1),

"t" : NumberLong(1)

"durableOpTime" : {

"ts" : Timestamp(1536912496, 1),

"t" : NumberLong(1)

}

"lastStableCheckpointTimestamp" : Timestamp(1536912496, 1),

"members" : [

{

"_id" : 0,

"name" : "127.0.0.1:6666",

"health" : 1,

"state" : 1,

"stateStr" : "PRIMARY",

"uptime" : 7380,

"optime" : {

"ts" : Timestamp(1536912496, 1),

"t" : NumberLong(1)

"optimeDate" : ISODate("2018-09-14T08:08:16Z"),

"syncingTo" : "",

"syncSourceHost" : "",

"syncSourceId" : -1,

"infoMessage" : "",

"electionTime" : Timestamp(1536909735, 2),

"electionDate" : ISODate("2018-09-14T07:22:15Z"),

"configVersion" : 5,

"self" : true,

"lastHeartbeatMessage" : ""

{

"_id" : 1,

"name" : "127.0.0.1:7777",

"health" : 1,

"state" : 2,

"stateStr" : "SECONDARY",

"uptime" : 1665,

"optime" : {

"ts" : Timestamp(1536912496, 1),

"t" : NumberLong(1)

"optimeDurable" : {

"ts" : Timestamp(1536912496, 1),

"t" : NumberLong(1)

"optimeDate" : ISODate("2018-09-14T08:08:16Z"),

"optimeDurableDate" : ISODate("2018-09-14T08:08:16Z"),

"lastHeartbeat" : ISODate("2018-09-14T08:08:21.763Z"),

"lastHeartbeatRecv" : ISODate("2018-09-14T08:08:21.763Z"),

"pingMs" : NumberLong(0),

"lastHeartbeatMessage" : "",

"syncingTo" : "127.0.0.1:6666",

"syncSourceHost" : "127.0.0.1:6666",

"syncSourceId" : 0,

"infoMessage" : "",

"configVersion" : 5

{

"_id" : 2,

"name" : "127.0.0.1:8888",

"health" : 0,

"state" : 8,

"stateStr" : "(not reachable/healthy)",

"uptime" : 0,

"lastHeartbeat" : ISODate("2018-09-14T08:08:21.115Z"),

"lastHeartbeatRecv" : ISODate("2018-09-14T08:06:07.727Z"),

"pingMs" : NumberLong(0),

"lastHeartbeatMessage" : "Error connecting to 127.0.0.1:8888 :: caused by :: Connection refused",

"syncingTo" : "",

"syncSourceHost" : "",

"syncSourceId" : -1,

"infoMessage" : "",

"configVersion" : -1

}

"ok" : 1,

"operationTime" : Timestamp(1536912496, 1),

"$clusterTime" : {

"clusterTime" : Timestamp(1536912496, 1),

"signature" : {

"hash" : BinData(0,"AAAAAAAAAAAAAAAAAAAAAAAAAAA="),

"keyId" : NumberLong(0)

}

MongoDB Enterprise OurReplica:PRIMARY>

Verify the Primary Server is Master Server

MongoDB Enterprise OurReplica:PRIMARY> db.isMaster();

{

"hosts" : [

"127.0.0.1:6666",

"127.0.0.1:7777"

"arbiters" : [

"127.0.0.1:8888"

"setName" : "OurReplica",

"setVersion" : 7,

"ismaster" : true,

"secondary" : false,

"primary" : "127.0.0.1:6666",

"me" : "127.0.0.1:6666",

"electionId" : ObjectId("7fffffff0000000000000001"),

"lastWrite" : {

"opTime" : {

"ts" : Timestamp(1536912816, 1),

"t" : NumberLong(1)

"lastWriteDate" : ISODate("2018-09-14T08:13:36Z"),

"majorityOpTime" : {

"ts" : Timestamp(1536912816, 1),

"t" : NumberLong(1)

"majorityWriteDate" : ISODate("2018-09-14T08:13:36Z")

"maxBsonObjectSize" : 16777216,

"maxMessageSizeBytes" : 48000000,

"maxWriteBatchSize" : 100000,

"localTime" : ISODate("2018-09-14T08:13:42.148Z"),

"logicalSessionTimeoutMinutes" : 30,

"minWireVersion" : 0,

"maxWireVersion" : 7,

"readOnly" : false,

"ok" : 1,

"operationTime" : Timestamp(1536912816, 1),

"$clusterTime" : {

"clusterTime" : Timestamp(1536912816, 1),

"signature" : {

"hash" : BinData(0,"AAAAAAAAAAAAAAAAAAAAAAAAAAA="),

"keyId" : NumberLong(0)

}

MongoDB Enterprise OurReplica:PRIMARY>

Note: Primary is read and write operation and Secondary server is only for Read only purpose. Arbiter server is for election purpose only.

Create Database from Primary Server

[root@nosqlDB data]# pwd

/usr/server1/mongodb/data

[root@nosqlDB data]# ls -l

total 536

-rw-------. 1 root root 36864 Sep 14 13:41 collection-9--7051616006171547431.wt

drwx------. 2 root root 4096 Sep 14 13:45 diagnostic.data

-rw-------. 1 root root 16384 Sep 14 12:52 index-10--7051616006171547431.wt

-rw-------. 1 root root 16384 Sep 14 11:36 index-7--7051616006171547431.wt

drwx------. 2 root root 4096 Sep 14 11:35 journal

-rw-------. 1 root root 36864 Sep 14 12:56 _mdb_catalog.wt

-rw-------. 1 root root 5 Sep 14 11:35 mongod.lock

-rw-------. 1 root root 36864 Sep 14 13:45 sizeStorer.wt

-rw-------. 1 root root 114 Sep 14 11:35 storage.bson

-rw-------. 1 root root 46 Sep 14 11:35 WiredTiger

-rw-------. 1 root root 4096 Sep 14 11:35 WiredTigerLAS.wt

-rw-------. 1 root root 21 Sep 14 11:35 WiredTiger.lock

-rw-------. 1 root root 1049 Sep 14 13:45 WiredTiger.turtle

-rw-------. 1 root root 102400 Sep 14 13:45 WiredTiger.wt

[root@nosqlDB data]#

MongoDB Enterprise OurReplica:PRIMARY> show dbs

admin 0.000GB

config 0.000GB

local 0.000GB

MongoDB Enterprise OurReplica:PRIMARY> use RepDB

switched to db RepDB

MongoDB Enterprise OurReplica:PRIMARY> show collections

MongoDB Enterprise OurReplica:PRIMARY>

MongoDB Enterprise OurReplica:PRIMARY> db.createCollection("First_rep_doc");

{

"ok" : 1,

"operationTime" : Timestamp(1536913185, 1),

"$clusterTime" : {

"clusterTime" : Timestamp(1536913185, 1),

"signature" : {

"hash" : BinData(0,"AAAAAAAAAAAAAAAAAAAAAAAAAAA="),

"keyId" : NumberLong(0)

}

MongoDB Enterprise OurReplica:PRIMARY>

MongoDB Enterprise OurReplica:PRIMARY> show collections;

First_rep_doc

MongoDB Enterprise OurReplica:PRIMARY>

MongoDB Enterprise OurReplica:PRIMARY> db.createCollection("mysecond_rep_doc");

{

"ok" : 1,

"operationTime" : Timestamp(1536913501, 1),

"$clusterTime" : {

"clusterTime" : Timestamp(1536913501, 1),

"signature" : {

"hash" : BinData(0,"AAAAAAAAAAAAAAAAAAAAAAAAAAA="),

"keyId" : NumberLong(0)

}

MongoDB Enterprise OurReplica:PRIMARY>

Connect to Secondary Server and Verify

MongoDB Enterprise OurReplica:SECONDARY> db

test

MongoDB Enterprise OurReplica:SECONDARY> show dbs

2018-09-14T13:58:50.306+0530 E QUERY [js] Error: listDatabases failed:{

"operationTime" : Timestamp(1536913726, 1),

"ok" : 0,

"errmsg" : "not master and slaveOk=false",

"code" : 13435,

"codeName" : "NotMasterNoSlaveOk",

"$clusterTime" : {

"clusterTime" : Timestamp(1536913726, 1),

"signature" : {

"hash" : BinData(0,"AAAAAAAAAAAAAAAAAAAAAAAAAAA="),

"keyId" : NumberLong(0)

}

} :

it is showing error here because it should act as either master or slave. we should inform secondary server for read only purpose. so we need to use here rs.slaveok();

MongoDB Enterprise OurReplica:SECONDARY> rs.slaveOk()

MongoDB Enterprise OurReplica:SECONDARY>

View Databases from Secondary Server

MongoDB Enterprise OurReplica:SECONDARY> show dbs;

AshokDB 0.000GB

RepDB 0.000GB

admin 0.000GB

config 0.000GB

local 0.000GB

MongoDB Enterprise OurReplica:SECONDARY>

View Collection from Secondary Server

MongoDB Enterprise OurReplica:SECONDARY> use RepDB

switched to db RepDB

MongoDB Enterprise OurReplica:SECONDARY> show collections;

First_rep_doc

MongoDB Enterprise OurReplica:SECONDARY>

Server 3

rs.status() # Show the error which occurred below, due to the arbiter server port number is not working and to resolve restarted the services in Server 3 again.

"lastHeartbeatMessage" : "Error connecting to 127.0.0.1:8888 :: caused by :: Connection refused",

[root@nosqlDB mongodb]# mongod -f mongodb.conf

2018-09-14T15:33:59.318+0530 I CONTROL [main] Automatically disabling TLS 1.0, to force-enable TLS 1.0 specify --sslDisabledProtocols 'none'

about to fork child process, waiting until server is ready for connections.

forked process: 4375

child process started successfully, parent exiting

[root@nosqlDB mongodb]# mongo --port 8888

MongoDB shell version v4.0.0

connecting to: mongodb://127.0.0.1:8888/

MongoDB server version: 4.0.0

Server has startup warnings:

2018-09-14T15:33:59.335+0530 I STORAGE [initandlisten]

2018-09-14T15:33:59.335+0530 I STORAGE [initandlisten] ** WARNING: Using the XFS filesystem is strongly recommended with the WiredTiger storage engine

2018-09-14T15:33:59.335+0530 I STORAGE [initandlisten] ** See http://dochub.mongodb.org/core/prodnotes-filesystem

2018-09-14T15:34:00.812+0530 I CONTROL [initandlisten]

2018-09-14T15:34:00.812+0530 I CONTROL [initandlisten] ** WARNING: Access control is not enabled for the database.

2018-09-14T15:34:00.812+0530 I CONTROL [initandlisten] ** Read and write access to data and configuration is unrestricted.

2018-09-14T15:34:00.812+0530 I CONTROL [initandlisten] ** WARNING: You are running this process as the root user, which is not recommended.

2018-09-14T15:34:00.812+0530 I CONTROL [initandlisten]

2018-09-14T15:34:00.813+0530 I CONTROL [initandlisten]

2018-09-14T15:34:00.813+0530 I CONTROL [initandlisten] ** WARNING: /sys/kernel/mm/transparent_hugepage/enabled is 'always'.

2018-09-14T15:34:00.813+0530 I CONTROL [initandlisten] ** We suggest setting it to 'never'

2018-09-14T15:34:00.813+0530 I CONTROL [initandlisten]

2018-09-14T15:34:00.813+0530 I CONTROL [initandlisten] ** WARNING: /sys/kernel/mm/transparent_hugepage/defrag is 'always'.

2018-09-14T15:34:00.813+0530 I CONTROL [initandlisten] ** We suggest setting it to 'never'

2018-09-14T15:34:00.813+0530 I CONTROL [initandlisten]

MongoDB Enterprise OurReplica:ARBITER>

Verify the Replication Status from Primary Server

MongoDB Enterprise OurReplica:PRIMARY> rs.status();

{

"set" : "OurReplica",

"date" : ISODate("2018-09-14T10:04:39.781Z"),

"myState" : 1,

"term" : NumberLong(1),

"syncingTo" : "",

"syncSourceHost" : "",

"syncSourceId" : -1,

"heartbeatIntervalMillis" : NumberLong(2000),

"optimes" : {

"lastCommittedOpTime" : {

"ts" : Timestamp(1536919477, 1),

"t" : NumberLong(1)

"readConcernMajorityOpTime" : {

"ts" : Timestamp(1536919477, 1),

"t" : NumberLong(1)

"appliedOpTime" : {

"ts" : Timestamp(1536919477, 1),

"t" : NumberLong(1)

"durableOpTime" : {

"ts" : Timestamp(1536919477, 1),

"t" : NumberLong(1)

}

"lastStableCheckpointTimestamp" : Timestamp(1536919457, 1),

"members" : [

{

"_id" : 0,

"name" : "127.0.0.1:6666",

"health" : 1,

"state" : 1,

"stateStr" : "PRIMARY",

"uptime" : 14358,

"optime" : {

"ts" : Timestamp(1536919477, 1),

"t" : NumberLong(1)

"optimeDate" : ISODate("2018-09-14T10:04:37Z"),

"syncingTo" : "",

"syncSourceHost" : "",

"syncSourceId" : -1,

"infoMessage" : "",

"electionTime" : Timestamp(1536909735, 2),

"electionDate" : ISODate("2018-09-14T07:22:15Z"),

"configVersion" : 7,

"self" : true,

"lastHeartbeatMessage" : ""

{

"_id" : 1,

"name" : "127.0.0.1:7777",

"health" : 1,

"state" : 2,

"stateStr" : "SECONDARY",

"uptime" : 8643,

"optime" : {

"ts" : Timestamp(1536919477, 1),

"t" : NumberLong(1)

"optimeDurable" : {

"ts" : Timestamp(1536919477, 1),

"t" : NumberLong(1)

"optimeDate" : ISODate("2018-09-14T10:04:37Z"),

"optimeDurableDate" : ISODate("2018-09-14T10:04:37Z"),

"lastHeartbeat" : ISODate("2018-09-14T10:04:37.952Z"),

"lastHeartbeatRecv" : ISODate("2018-09-14T10:04:37.952Z"),

"pingMs" : NumberLong(0),

"lastHeartbeatMessage" : "",

"syncingTo" : "127.0.0.1:6666",

"syncSourceHost" : "127.0.0.1:6666",

"syncSourceId" : 0,

"infoMessage" : "",

"configVersion" : 7

{

"_id" : 2,

"name" : "127.0.0.1:8888",

"health" : 1,

"state" : 7,

"stateStr" : "ARBITER",

"uptime" : 36,

"lastHeartbeat" : ISODate("2018-09-14T10:04:38.811Z"),

"lastHeartbeatRecv" : ISODate("2018-09-14T10:04:38.898Z"),

"pingMs" : NumberLong(0),

"lastHeartbeatMessage" : "",

"syncingTo" : "",

"syncSourceHost" : "",

"syncSourceId" : -1,

"infoMessage" : "",

"configVersion" : 7

}

"ok" : 1,

"operationTime" : Timestamp(1536919477, 1),

"$clusterTime" : {

"clusterTime" : Timestamp(1536919477, 1),

"signature" : {

"hash" : BinData(0,"AAAAAAAAAAAAAAAAAAAAAAAAAAA="),

"keyId" : NumberLong(0)

}

MongoDB Enterprise OurReplica:PRIMARY>

MongoDB Enterprise OurReplica:PRIMARY> rs.conf();

{

"_id" : "OurReplica",

"version" : 7,

"protocolVersion" : NumberLong(1),

"writeConcernMajorityJournalDefault" : true,

"members" : [

{

"_id" : 0,

"host" : "127.0.0.1:6666",

"arbiterOnly" : false,

"buildIndexes" : true,

"hidden" : false,

"priority" : 1,

"tags" : {

"slaveDelay" : NumberLong(0),

"votes" : 1

{

"_id" : 1,

"host" : "127.0.0.1:7777",

"arbiterOnly" : false,

"buildIndexes" : true,

"hidden" : false,

"priority" : 1,

"tags" : {

"slaveDelay" : NumberLong(0),

"votes" : 1

{

"_id" : 2,

"host" : "127.0.0.1:8888",

"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")

}

whom to Sync From?

MongoDB Enterprise OurReplica:PRIMARY> rs.debug.getLastOpWritten()

{

"ts" : Timestamp(1536923802, 1),

"t" : NumberLong(3),

"h" : NumberLong("3203467780775746843"),

"v" : 2,

"op" : "n",

"ns" : "",

"wall" : ISODate("2018-09-14T11:16:42.846Z"),

"o" : {

"msg" : "periodic noop"

}

MongoDB Enterprise OurReplica:PRIMARY>

MongoDB Enterprise OurReplica:PRIMARY> db.adminCommand({replSetGetStatus:1})

{

"set" : "OurReplica",

"date" : ISODate("2018-09-14T11:17:38.366Z"),

"myState" : 1,

"term" : NumberLong(3),

"syncingTo" : "",

"syncSourceHost" : "",

"syncSourceId" : -1,

"heartbeatIntervalMillis" : NumberLong(2000),

"optimes" : {

"lastCommittedOpTime" : {

"ts" : Timestamp(1536923852, 1),

"t" : NumberLong(3)

"readConcernMajorityOpTime" : {

"ts" : Timestamp(1536923852, 1),

"t" : NumberLong(3)

"appliedOpTime" : {

"ts" : Timestamp(1536923852, 1),

"t" : NumberLong(3)

"durableOpTime" : {

"ts" : Timestamp(1536923852, 1),

"t" : NumberLong(3)

}

"lastStableCheckpointTimestamp" : Timestamp(1536923792, 1),

"members" : [

{

"_id" : 0,

"name" : "127.0.0.1:6666",

"health" : 1,

"state" : 1,

"stateStr" : "PRIMARY",

"uptime" : 1987,

"optime" : {

"ts" : Timestamp(1536923852, 1),

"t" : NumberLong(3)

"optimeDate" : ISODate("2018-09-14T11:17:32Z"),

"syncingTo" : "",

"syncSourceHost" : "",

"syncSourceId" : -1,

"infoMessage" : "",

"electionTime" : Timestamp(1536921910, 1),

"electionDate" : ISODate("2018-09-14T10:45:10Z"),

"configVersion" : 14,

"self" : true,

"lastHeartbeatMessage" : ""

{

"_id" : 1,

"name" : "127.0.0.1:7777",

"health" : 1,

"state" : 2,

"stateStr" : "SECONDARY",

"uptime" : 296,

"optime" : {

"ts" : Timestamp(1536923852, 1),

"t" : NumberLong(3)

"optimeDurable" : {

"ts" : Timestamp(1536923852, 1),

"t" : NumberLong(3)

"optimeDate" : ISODate("2018-09-14T11:17:32Z"),

"optimeDurableDate" : ISODate("2018-09-14T11:17:32Z"),

"lastHeartbeat" : ISODate("2018-09-14T11:17:37.918Z"),

"lastHeartbeatRecv" : ISODate("2018-09-14T11:17:37.917Z"),

"pingMs" : NumberLong(0),

"lastHeartbeatMessage" : "",

"syncingTo" : "127.0.0.1:6666",

"syncSourceHost" : "127.0.0.1:6666",

"syncSourceId" : 0,

"infoMessage" : "",

"configVersion" : 14

}

"ok" : 1,

"operationTime" : Timestamp(1536923852, 1),

"$clusterTime" : {

"clusterTime" : Timestamp(1536923852, 1),

"signature" : {

"hash" : BinData(0,"AAAAAAAAAAAAAAAAAAAAAAAAAAA="),

"keyId" : NumberLong(0)

}

MongoDB Enterprise OurReplica:PRIMARY>

Forcing a New Election

The current primary server can be forced to step down using the rs.stepDown() command.

Ø When you are simulating the impact of a primary failure, forcing the cluster to fail over. This lets you test how your application responds in such a scenario.

Ø When the primary server needs to be offline. this is done for we either a maintenance activity or for upgrading or to investigating the server.

Ø When a diagnostic process need to be run against the data structures.

MongoDB Enterprise OurReplica:PRIMARY> use admin

switched to db admin

MongoDB Enterprise OurReplica:PRIMARY> rs.stepDown()

2018-09-14T16:55:29.990+0530 E QUERY [js] Error: error doing query: failed: network error while attempting to run command 'replSetStepDown' on host '127.0.0.1:6666' :

DB.prototype.runCommand@src/mongo/shell/db.js:168:1

DB.prototype.adminCommand@src/mongo/shell/db.js:185:1

rs.stepDown@src/mongo/shell/utils.js:1398:12

@(shell):1:1

2018-09-14T16:55:29.991+0530 I NETWORK [js] trying reconnect to 127.0.0.1:6666 failed

2018-09-14T16:55:29.992+0530 I NETWORK [js] reconnect 127.0.0.1:6666 ok

MongoDB Enterprise OurReplica:SECONDARY>

MongoDB Enterprise OurReplica:SECONDARY> rs.status();

{

"set" : "OurReplica",

"date" : ISODate("2018-09-14T11:30:07.424Z"),

"myState" : 2,

"term" : NumberLong(4),

"syncingTo" : "127.0.0.1:7777",

"syncSourceHost" : "127.0.0.1:7777",

"syncSourceId" : 1,

"heartbeatIntervalMillis" : NumberLong(2000),

"optimes" : {

"lastCommittedOpTime" : {

"ts" : Timestamp(1536924599, 1),

"t" : NumberLong(4)

"readConcernMajorityOpTime" : {

"ts" : Timestamp(1536924599, 1),

"t" : NumberLong(4)

"appliedOpTime" : {

"ts" : Timestamp(1536924599, 1),

"t" : NumberLong(4)

"durableOpTime" : {

"ts" : Timestamp(1536924599, 1),

"t" : NumberLong(4)

}

"lastStableCheckpointTimestamp" : Timestamp(1536924569, 1),

"members" : [

{

"_id" : 0,

"name" : "127.0.0.1:6666",

"health" : 1,

"state" : 2,

"stateStr" : "SECONDARY",

"uptime" : 2736,

"optime" : {

"ts" : Timestamp(1536924599, 1),

"t" : NumberLong(4)

"optimeDate" : ISODate("2018-09-14T11:29:59Z"),

"syncingTo" : "127.0.0.1:7777",

"syncSourceHost" : "127.0.0.1:7777",

"syncSourceId" : 1,

"infoMessage" : "",

"configVersion" : 18,

"self" : true,

"lastHeartbeatMessage" : ""

{

"_id" : 1,

"name" : "127.0.0.1:7777",

"health" : 1,

"state" : 1,

"stateStr" : "PRIMARY",

"uptime" : 453,

"optime" : {

"ts" : Timestamp(1536924599, 1),

"t" : NumberLong(4)

"optimeDurable" : {

"ts" : Timestamp(1536924599, 1),

"t" : NumberLong(4)

"optimeDate" : ISODate("2018-09-14T11:29:59Z"),

"optimeDurableDate" : ISODate("2018-09-14T11:29:59Z"),

"lastHeartbeat" : ISODate("2018-09-14T11:30:06.805Z"),

"lastHeartbeatRecv" : ISODate("2018-09-14T11:30:06.819Z"),

"pingMs" : NumberLong(0),

"lastHeartbeatMessage" : "",

"syncingTo" : "",

"syncSourceHost" : "",

"syncSourceId" : -1,

"infoMessage" : "",

"electionTime" : Timestamp(1536924338, 1),

"electionDate" : ISODate("2018-09-14T11:25:38Z"),

"configVersion" : 18

}

"ok" : 1,

"operationTime" : Timestamp(1536924599, 1),

"$clusterTime" : {

"clusterTime" : Timestamp(1536924599, 1),

"signature" : {

"hash" : BinData(0,"AAAAAAAAAAAAAAAAAAAAAAAAAAA="),

"keyId" : NumberLong(0)

}

MongoDB Enterprise OurReplica:SECONDARY>

Make it Secondary Server become Primary Server

MongoDB Enterprise OurReplica:SECONDARY>
MongoDB Enterprise OurReplica:PRIMARY>
MongoDB Enterprise OurReplica:PRIMARY>

MongoDB Enterprise OurReplica:PRIMARY> rs.stepDown();

2018-09-14T17:08:18.608+0530 E QUERY [js] Error: error doing query: failed: network error while attempting to run command 'replSetStepDown' on host '127.0.0.1:7777' :

DB.prototype.runCommand@src/mongo/shell/db.js:168:1

DB.prototype.adminCommand@src/mongo/shell/db.js:186:16

rs.stepDown@src/mongo/shell/utils.js:1398:12

@(shell):1:1

2018-09-14T17:08:18.609+0530 I NETWORK [js] trying reconnect to 127.0.0.1:7777 failed

2018-09-14T17:08:18.609+0530 I NETWORK [js] reconnect 127.0.0.1:7777 ok

MongoDB Enterprise OurReplica:SECONDARY>

MongoDB Enterprise OurReplica:SECONDARY> rs.status();
{
"set" : "OurReplica",
"date" : ISODate("2018-09-14T11:38:33.938Z"),
"myState" : 2,
"term" : NumberLong(5),
"syncingTo" : "127.0.0.1:6666",
"syncSourceHost" : "127.0.0.1:6666",
"syncSourceId" : 0,
"heartbeatIntervalMillis" : NumberLong(2000),
"optimes" : {
"lastCommittedOpTime" : {
"ts" : Timestamp(1536925109, 1),
"t" : NumberLong(5)
},
"readConcernMajorityOpTime" : {
"ts" : Timestamp(1536925109, 1),
"t" : NumberLong(5)
},
"appliedOpTime" : {
"ts" : Timestamp(1536925109, 1),
"t" : NumberLong(5)
},
"durableOpTime" : {
"ts" : Timestamp(1536925109, 1),
"t" : NumberLong(5)
}
},
"lastStableCheckpointTimestamp" : Timestamp(1536925079, 1),
"members" : [
{
"_id" : 0,
"name" : "127.0.0.1:6666",
"health" : 1,
"state" : 1,
"stateStr" : "PRIMARY",
"uptime" : 961,
"optime" : {
"ts" : Timestamp(1536925109, 1),
"t" : NumberLong(5)
},
"optimeDurable" : {
"ts" : Timestamp(1536925109, 1),
"t" : NumberLong(5)
},
"optimeDate" : ISODate("2018-09-14T11:38:29Z"),
"optimeDurableDate" : ISODate("2018-09-14T11:38:29Z"),
"lastHeartbeat" : ISODate("2018-09-14T11:38:32.466Z"),
"lastHeartbeatRecv" : ISODate("2018-09-14T11:38:32.458Z"),
"pingMs" : NumberLong(0),
"lastHeartbeatMessage" : "",
"syncingTo" : "",
"syncSourceHost" : "",
"syncSourceId" : -1,
"infoMessage" : "",
"electionTime" : Timestamp(1536925108, 1),
"electionDate" : ISODate("2018-09-14T11:38:28Z"),
"configVersion" : 18
},
{
"_id" : 1,
"name" : "127.0.0.1:7777",
"health" : 1,
"state" : 2,
"stateStr" : "SECONDARY",
"uptime" : 3214,
"optime" : {
"ts" : Timestamp(1536925109, 1),
"t" : NumberLong(5)
},
"optimeDate" : ISODate("2018-09-14T11:38:29Z"),
"syncingTo" : "127.0.0.1:6666",
"syncSourceHost" : "127.0.0.1:6666",
"syncSourceId" : 0,
"infoMessage" : "",
"configVersion" : 18,
"self" : true,
"lastHeartbeatMessage" : ""
}
],
"ok" : 1,
"operationTime" : Timestamp(1536925109, 1),
"$clusterTime" : {
"clusterTime" : Timestamp(1536925109, 1),
"signature" : {
"hash" : BinData(0,"AAAAAAAAAAAAAAAAAAAAAAAAAAA="),
"keyId" : NumberLong(0)
}
}
}
MongoDB Enterprise OurReplica:SECONDARY>

DBA TO CLOUD AND BIGDATA SOLUTION

Wednesday, August 26, 2020

MongoDB Replica set port number change

e. Now Add the Arbiter Node with Primary: :

STEP 6: Let us check the configuration of the replica set after adding Arbiter node

Final check : A)

Tuesday, August 25, 2020

MongoDB Replication Configuration step by step on RHEL 6.5 64Bit OS

MongoDB Replication

Replica-Set

Step by Step YugabyteDB 2.11 (Open Source) Distributed DB - Multi-node Cluster Setup on RHEL

BLOCKROLL

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