Installation & Configuration of Replication cluster in MongoDB– with example

Installation & Configuration of Replication cluster – with example

Ø  Imagine that we have 3 data centers

Hosts:

server1.tommy.com – DC1

server2.tommy.com – DC2

server3.tommy.com – DC3

Step 1) Plan Ahead! Pick the replica sets, Primary, Secondary, 2nd Secondary (if needed) and Arbiters

rep1a

server1.tommy.com - primary

server2.tommy.com - secondary 1st

server3.tommy.com - secondary 2nd

rep2a

server1.tommy.com - secondary 1st

server2.tommy.com - primary

server3.tommy.com - secondary 2nd

rep3a

server1.tommy.com - secondary 1st

server2.tommy.com - secondary 2nd

server3.tommy.com - primary

Step 2) Download the mongodb tar file

https://docs.mongodb.com/manual/tutorial/install-mongodb-on-linux/

curl -O https://fastdl.mongodb.org/linux/mongodb-linux-x86_64-3.4.2.tgz

tar -zxvf mongodb-linux-x86_64-3.4.2.tgz

mkdir -p mongodb

cp -R -n mongodb-linux-x86_64-3.4.2/ mongodb

~/.bashrc

export PATH=<mongodb-install-directory>/bin:$PATH

Step 3) Create replica set and replica set member directories.

server1.tommy.com

cd

mkdir -p rep1a/rs1/data

mkdir -p rep2a/rs2/data

mkdir -p rep3a/rs2/data

server2.tommy.com

cd

mkdir -p rep1a/rs2/data

mkdir -p rep2a/rs1/data

mkdir -p rep3a/rs3/data

server3.tommy.com

cd

mkdir -p rep1a/rs3/data

mkdir -p rep2a/rs3/data

mkdir -p rep3a/rs1/data

Step 4) Make other necessary directories for config files(for each member)

server1.tommy.com

cd

mkdir -p rep1a/rs1/conf rep2a/rs2/conf rep3a/rs2/conf

mkdir -p rep1a/rs1/logs rep2a/rs2/logs rep3a/rs2/logs

server2.tommy.com

cd

mkdir -p rep1a/rs2/conf rep2a/rs1/conf rep3a/rs3/conf

mkdir -p rep1a/rs2/logs rep2a/rs1/logs rep3a/rs3/logs

server3.tommy.com

cd

mkdir -p rep1a/rs3/conf rep2a/rs3/conf rep3a/rs1/conf

mkdir -p rep1a/rs3/logs rep2a/rs3/logs rep3a/rs1/logs

Step 5) Create Config files(for each member)

server1.tommy.com

vi /home/tommy/rep1a/rs1/conf/mongod.conf

dbpath=/home/tommy/rep1a/rs1/data

#pidfilepath = /opt/mongo/rep1a/rs1/data/mongod_wiredTiger/mongod.pid

logpath = /home/tommy/rep1a/rs1/logs/mongod.log

logappend = true

nojournal = true

oplogSize = 4096

fork = true

#rest = true

#shardsvr = true

port = 20001

replSet = rep1a

#notablescan = true

#storageEngine= wiredTiger

#auth = true

#keyFile = /opt/mongo/rep1a/rs1/admin/conf/mongo.key

#mms-token = <token>

#mms-name = <server-name>

#mms-interval = <seconds>

vi /home/tommy/rep2a/rs2/conf/mongod.conf

dbpath=/home/tommy/rep2a/rs2/data

#pidfilepath = /opt/mongo/rep1a/rs1/data/mongod_wiredTiger/mongod.pid

logpath = /home/tommy/rep2a/rs2/logs/mongod.log

logappend = true

nojournal = true

oplogSize = 4096

fork = true

#rest = true

#shardsvr = true

port = 20002

replSet = rep1a

#notablescan = true

#storageEngine= wiredTiger

#auth = true

#keyFile = /opt/mongo/rep1a/rs1/admin/conf/mongo.key

#mms-token = <token>

#mms-name = <server-name>

#mms-interval = <seconds>

vi /home/tommy/rep3a/rs2/conf/mongod.conf

dbpath=/home/tommy/rep3a/rs2/data

#pidfilepath = /opt/mongo/rep1a/rs1/data/mongod_wiredTiger/mongod.pid

logpath = /home/tommy/rep3a/rs2/logs/mongod.log

logappend = true

nojournal = true

oplogSize = 4096

fork = true

#rest = true

#shardsvr = true

port = 20003

replSet = rep3a

#notablescan = true

#storageEngine= wiredTiger

#auth = true

#keyFile = /opt/mongo/rep1a/rs1/admin/conf/mongo.key

#mms-token = <token>

#mms-name = <server-name>

#mms-interval = <seconds>

server2.tommy.com

vi /home/tommy/rep1a/rs2/conf/mongod.conf

dbpath=/home/tommy/rep1a/rs2/data

#pidfilepath = /opt/mongo/rep1a/rs1/data/mongod_wiredTiger/mongod.pid

logpath = /home/tommy/rep1a/rs2/logs/mongod.log

logappend = true

nojournal = true

oplogSize = 4096

fork = true

#rest = true

#shardsvr = true

port = 20002

replSet = rep1a

#notablescan = true

#storageEngine= wiredTiger

#auth = true

#keyFile = /opt/mongo/rep1a/rs1/admin/conf/mongo.key

#mms-token = <token>

#mms-name = <server-name>

#mms-interval = <seconds>

vi /home/tommy/rep2a/rs1/conf/mongod.conf

dbpath=/home/tommy/rep2a/rs1/data

#pidfilepath = /opt/mongo/rep1a/rs1/data/mongod_wiredTiger/mongod.pid

logpath = /home/tommy/rep2a/rs1/logs/mongod.log

logappend = true

nojournal = true

oplogSize = 4096

fork = true

#rest = true

#shardsvr = true

port = 20001

replSet = rep1a

#notablescan = true

#storageEngine= wiredTiger

#auth = true

#keyFile = /opt/mongo/rep1a/rs1/admin/conf/mongo.key

#mms-token = <token>

#mms-name = <server-name>

#mms-interval = <seconds>

vi /home/tommy/rep3a/rs3/conf/mongod.conf

dbpath=/home/tommy/rep3a/rs3/data

#pidfilepath = /opt/mongo/rep1a/rs1/data/mongod_wiredTiger/mongod.pid

logpath = /home/tommy/rep3a/rs3/logs/mongod.log

logappend = true

nojournal = true

oplogSize = 4096

fork = true

#rest = true

#shardsvr = true

port = 20002

replSet = rep3a

#notablescan = true

#storageEngine= wiredTiger

#auth = true

#keyFile = /opt/mongo/rep1a/rs1/admin/conf/mongo.key

#mms-token = <token>

#mms-name = <server-name>

#mms-interval = <seconds>

server3.tommy.com

vi /home/tommy/rep1a/rs3/conf/mongod.conf

dbpath=/home/tommy/rep1a/rs3/data

#pidfilepath = /opt/mongo/rep1a/rs1/data/mongod_wiredTiger/mongod.pid

logpath = /home/tommy/rep1a/rs3/logs/mongod.log

logappend = true

nojournal = true

oplogSize = 4096

fork = true

#rest = true

#shardsvr = true

port = 20003

replSet = rep1a

#notablescan = true

#storageEngine= wiredTiger

#auth = true

#keyFile = /opt/mongo/rep1a/rs1/admin/conf/mongo.key

#mms-token = <token>

#mms-name = <server-name>

#mms-interval = <seconds>

vi /home/tommy/rep2a/rs3/conf/mongod.conf

dbpath=/home/tommy/rep2a/rs3/data

#pidfilepath = /opt/mongo/rep1a/rs1/data/mongod_wiredTiger/mongod.pid

logpath = /home/tommy/rep2a/rs3/logs/mongod.log

logappend = true

nojournal = true

oplogSize = 4096

fork = true

#rest = true

#shardsvr = true

port = 20002

replSet = rep1a

#notablescan = true

#storageEngine= wiredTiger

#auth = true

#keyFile = /opt/mongo/rep1a/rs1/admin/conf/mongo.key

#mms-token = <token>

#mms-name = <server-name>

#mms-interval = <seconds>

vi /home/tommy/rep3a/rs1/conf/mongod.conf

dbpath=/home/tommy/rep3a/rs1/data

#pidfilepath = /opt/mongo/rep1a/rs1/data/mongod_wiredTiger/mongod.pid

logpath = /home/tommy/rep3a/rs1/logs/mongod.log

logappend = true

nojournal = true

oplogSize = 4096

fork = true

#rest = true

#shardsvr = true

port = 20001

replSet = rep3a

#notablescan = true

#storageEngine= wiredTiger

#auth = true

#keyFile = /opt/mongo/rep1a/rs1/admin/conf/mongo.key

#mms-token = <token>

#mms-name = <server-name>

#mms-interval = <seconds>

Step 6) Create a softlink to bin folder for easy access:

ln -s /home/tommy/mongodb/mongodb-linux-x86_64-3.4.2/bin mongo_bin

ln -s /home/tommy this_host

Step 7) Start all the mongod processes

server1.tommy.com

mongo_bin/mongod -f /home/tommy/rep1a/rs1/conf/mongod.conf

mongo_bin/mongod -f /home/tommy/rep2a/rs2/conf/mongod.conf

mongo_bin/mongod -f /home/tommy/rep3a/rs2/conf/mongod.conf

server2.tommy.com

mongo_bin/mongod -f /home/tommy/rep1a/rs2/conf/mongod.conf

mongo_bin/mongod -f /home/tommy/rep2a/rs1/conf/mongod.conf

mongo_bin/mongod -f /home/tommy/rep3a/rs3/conf/mongod.conf

server3.tommy.com

mongo_bin/mongod -f /home/tommy/rep1a/rs3/conf/mongod.conf

mongo_bin/mongod -f /home/tommy/rep2a/rs3/conf/mongod.conf

mongo_bin/mongod -f /home/tommy/rep3a/rs1/conf/mongod.conf

Step 8) Check the process running

[tommy@server3.tommy.com ~]$ ps aux | grep mongod

tommy    30634  0.6  0.0 273816 43668 ?        Sl   12:41   0:00 mongo_bin/mongod -f /home/tommy/rep1a/rs3/conf/mongod.conf

tommy    31323  1.0  0.0 273812 39888 ?        Sl   12:42   0:00 mongo_bin/mongod -f /home/tommy/rep2a/rs3/conf/mongod.conf

tommy    31343  2.0  0.0 273812 41448 ?        Sl   12:42   0:00 mongo_bin/mongod -f /home/tommy/rep3a/rs1/conf/mongod.conf

Step 9) Initiate the Replica sets:

server1.tommy.com

> mongo_bin/mongo --port 20001

> rs.initiate()

> rs.add("server2.tommy.com:20002")

> rs.add("server3.tommy.com:20003")

> rs.status()

mongo_bin/mongo --port 20001

[tommy@server1.tommy.com ~]$ mongo_bin/mongo --port 20001

MongoDB shell version v3.4.2

connecting to: mongodb://127.0.0.1:20001/

MongoDB server version: 3.4.2

Server has startup warnings:

2017-04-21T12:23:07.139-0500 I STORAGE  [initandlisten]

2017-04-21T12:23:07.139-0500 I STORAGE  [initandlisten] ** WARNING: Using the XFS filesystem is strongly recommended with the WiredTiger storage engine

2017-04-21T12:23:07.139-0500 I STORAGE  [initandlisten] **          See http://dochub.mongodb.org/core/prodnotes-filesystem

2017-04-21T12:23:07.174-0500 I CONTROL  [initandlisten]

2017-04-21T12:23:07.174-0500 I CONTROL  [initandlisten] ** WARNING: Access control is not enabled for the database.

2017-04-21T12:23:07.174-0500 I CONTROL  [initandlisten] **          Read and write access to data and configuration is unrestricted.

2017-04-21T12:23:07.174-0500 I CONTROL  [initandlisten]

2017-04-21T12:23:07.175-0500 I CONTROL  [initandlisten]

2017-04-21T12:23:07.175-0500 I CONTROL  [initandlisten] ** WARNING: You are running on a NUMA machine.

2017-04-21T12:23:07.175-0500 I CONTROL  [initandlisten] **          We suggest launching mongod like this to avoid performance problems:

2017-04-21T12:23:07.175-0500 I CONTROL  [initandlisten] **              numactl --interleave=all mongod [other options]

2017-04-21T12:23:07.175-0500 I CONTROL  [initandlisten]

2017-04-21T12:23:07.175-0500 I CONTROL  [initandlisten] ** WARNING: /sys/kernel/mm/transparent_hugepage/enabled is 'always'.

2017-04-21T12:23:07.175-0500 I CONTROL  [initandlisten] **        We suggest setting it to 'never'

2017-04-21T12:23:07.175-0500 I CONTROL  [initandlisten]

2017-04-21T12:23:07.175-0500 I CONTROL  [initandlisten] ** WARNING: /sys/kernel/mm/transparent_hugepage/defrag is 'always'.

2017-04-21T12:23:07.175-0500 I CONTROL  [initandlisten] **        We suggest setting it to 'never'

2017-04-21T12:23:07.175-0500 I CONTROL  [initandlisten]

> 

rs.initiate()

> rs.initiate()

{

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

        "me" : "server1.tommy.com:20001",

        "ok" : 1

}

rep1a:SECONDARY>

rep1a:PRIMARY>

rs.add()

> rs.add("server2.tommy.com:20002")

rep1a:PRIMARY> rs.add("server2.tommy.com:20002")

{ "ok" : 1 }

> rs.add("server3.tommy.com:20003")

rep1a:PRIMARY> rs.add("server3.tommy.com:20003")

{ "ok" : 1 }

rs.status()

rep1a:PRIMARY> rs.status()

{

        "set" : "rep1a",

        "date" : ISODate("2017-04-23T04:54:51.753Z"),

        "myState" : 1,

        "term" : NumberLong(1),

        "heartbeatIntervalMillis" : NumberLong(2000),

        "optimes" : {

                "lastCommittedOpTime" : {

                        "ts" : Timestamp(0, 0),

                        "t" : NumberLong(-1)

                },

                "appliedOpTime" : {

                        "ts" : Timestamp(1492923282, 1),

                        "t" : NumberLong(1)

                },

                "durableOpTime" : {

                        "ts" : Timestamp(1492923171, 1),

                        "t" : NumberLong(-1)

                }

        },

        "members" : [

                {

                        "_id" : 0,

                        "name" : "server1.tommy.com:20001",

                        "health" : 1,

                        "state" : 1,

                        "stateStr" : "PRIMARY",

                        "uptime" : 127904,

                        "optime" : {

                                "ts" : Timestamp(1492923282, 1),

                                "t" : NumberLong(1)

                        },

                        "optimeDate" : ISODate("2017-04-23T04:54:42Z"),

                        "infoMessage" : "could not find member to sync from",

                        "electionTime" : Timestamp(1492923171, 2),

                        "electionDate" : ISODate("2017-04-23T04:52:51Z"),

                        "configVersion" : 3,

                        "self" : true

                },

                {

                        "_id" : 1,

                        "name" : "server2.tommy.com:20002",

                        "health" : 1,

                        "state" : 2,

                        "stateStr" : "SECONDARY",

                        "uptime" : 70,

                        "optime" : {

                                "ts" : Timestamp(1492923282, 1),

                                "t" : NumberLong(1)

                        },

                        "optimeDurable" : {

                                "ts" : Timestamp(0, 0),

                                "t" : NumberLong(-1)

                        },

                        "optimeDate" : ISODate("2017-04-23T04:54:42Z"),

                        "optimeDurableDate" : ISODate("1970-01-01T00:00:00Z"),

                        "lastHeartbeat" : ISODate("2017-04-23T04:54:50.381Z"),

                        "lastHeartbeatRecv" : ISODate("2017-04-23T04:54:51.384Z"),

                        "pingMs" : NumberLong(0),

                        "syncingTo" : "server1.tommy.com:20001",

                        "configVersion" : 3

                },

                {

                        "_id" : 2,

                        "name" : "server3.tommy.com:20003",

                        "health" : 1,

                        "state" : 2,

                        "stateStr" : "SECONDARY",

                        "uptime" : 61,

                        "optime" : {

                                "ts" : Timestamp(1492923282, 1),

                                "t" : NumberLong(1)

                        },

                        "optimeDurable" : {

                                "ts" : Timestamp(0, 0),

                                "t" : NumberLong(-1)

                        },

                        "optimeDate" : ISODate("2017-04-23T04:54:42Z"),

                        "optimeDurableDate" : ISODate("1970-01-01T00:00:00Z"),

                        "lastHeartbeat" : ISODate("2017-04-23T04:54:50.381Z"),

                        "lastHeartbeatRecv" : ISODate("2017-04-23T04:54:51.438Z"),

                        "pingMs" : NumberLong(0),

                        "syncingTo" : "server1.tommy.com:20001",

                        "configVersion" : 3

                }

        ],

        "ok" : 1

}

server2.tommy.com

> mongo_bin/mongo --port 20001

> rs.initiate()

> rs.add("server1.tommy.com:20002")

> rs.add("server3.tommy.com:20003")

> rs.status()

mongo_bin/mongo --port 20001

[tommy@server2.tommy.com ~]$ mongo_bin/mongo --port 20001

MongoDB shell version v3.4.2

connecting to: mongodb://127.0.0.1:20001/

MongoDB server version: 3.4.2

Server has startup warnings:

2017-04-21T12:36:44.248-0500 I STORAGE  [initandlisten]

2017-04-21T12:36:44.248-0500 I STORAGE  [initandlisten] ** WARNING: Using the XFS filesystem is strongly recommended with the WiredTiger storage engine

2017-04-21T12:36:44.248-0500 I STORAGE  [initandlisten] **          See http://dochub.mongodb.org/core/prodnotes-filesystem

2017-04-21T12:36:44.273-0500 I CONTROL  [initandlisten]

2017-04-21T12:36:44.273-0500 I CONTROL  [initandlisten] ** WARNING: Access control is not enabled for the database.

2017-04-21T12:36:44.273-0500 I CONTROL  [initandlisten] **          Read and write access to data and configuration is unrestricted.

2017-04-21T12:36:44.273-0500 I CONTROL  [initandlisten]

2017-04-21T12:36:44.274-0500 I CONTROL  [initandlisten]

2017-04-21T12:36:44.274-0500 I CONTROL  [initandlisten] ** WARNING: You are running on a NUMA machine.

2017-04-21T12:36:44.274-0500 I CONTROL  [initandlisten] **          We suggest launching mongod like this to avoid performance problems:

2017-04-21T12:36:44.274-0500 I CONTROL  [initandlisten] **              numactl --interleave=all mongod [other options]

2017-04-21T12:36:44.274-0500 I CONTROL  [initandlisten]

2017-04-21T12:36:44.274-0500 I CONTROL  [initandlisten] ** WARNING: /sys/kernel/mm/transparent_hugepage/enabled is 'always'.

2017-04-21T12:36:44.274-0500 I CONTROL  [initandlisten] **        We suggest setting it to 'never'

2017-04-21T12:36:44.274-0500 I CONTROL  [initandlisten]

2017-04-21T12:36:44.274-0500 I CONTROL  [initandlisten] ** WARNING: /sys/kernel/mm/transparent_hugepage/defrag is 'always'.

2017-04-21T12:36:44.274-0500 I CONTROL  [initandlisten] **        We suggest setting it to 'never'

2017-04-21T12:36:44.274-0500 I CONTROL  [initandlisten]

> 

rs.initiate()

> rs.initiate()

{

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

        "me" : "server2.tommy.com:20001",

        "ok" : 1

}

rep2a:SECONDARY>

rep2a:PRIMARY>

rs.add()

rep2a:PRIMARY> rs.add("server1.tommy.com:20002")

{ "ok" : 1 }

rep2a:PRIMARY> rs.add("server3.tommy.com:20003")

{ "ok" : 1 }

rs.status()

rep2a:PRIMARY> rs.status()

{

        "set" : "rep2a",

        "date" : ISODate("2017-04-23T05:23:42.579Z"),

        "myState" : 1,

        "term" : NumberLong(1),

        "heartbeatIntervalMillis" : NumberLong(2000),

        "optimes" : {

                "lastCommittedOpTime" : {

                        "ts" : Timestamp(0, 0),

                        "t" : NumberLong(-1)

                },

                "appliedOpTime" : {

                        "ts" : Timestamp(1492925019, 1),

                        "t" : NumberLong(1)

                },

                "durableOpTime" : {

                        "ts" : Timestamp(1492924928, 1),

                        "t" : NumberLong(-1)

                }

        },

        "members" : [

                {

                        "_id" : 0,

                        "name" : "server2.tommy.com:20001",

                        "health" : 1,

                        "state" : 1,

                        "stateStr" : "PRIMARY",

                        "uptime" : 159,

                        "optime" : {

                                "ts" : Timestamp(1492925019, 1),

                                "t" : NumberLong(1)

                        },

                        "optimeDate" : ISODate("2017-04-23T05:23:39Z"),

                        "infoMessage" : "could not find member to sync from",

                        "electionTime" : Timestamp(1492924928, 2),

                        "electionDate" : ISODate("2017-04-23T05:22:08Z"),

                        "configVersion" : 3,

                        "self" : true

                },

                {

                        "_id" : 1,

                        "name" : "server1.tommy.com:20002",

                        "health" : 1,

                        "state" : 2,

                        "stateStr" : "SECONDARY",

                        "uptime" : 66,

                        "optime" : {

                                "ts" : Timestamp(1492925019, 1),

                                "t" : NumberLong(1)

                        },

                        "optimeDurable" : {

                                "ts" : Timestamp(0, 0),

                                "t" : NumberLong(-1)

                        },

                        "optimeDate" : ISODate("2017-04-23T05:23:39Z"),

                        "optimeDurableDate" : ISODate("1970-01-01T00:00:00Z"),

                        "lastHeartbeat" : ISODate("2017-04-23T05:23:41.270Z"),

                        "lastHeartbeatRecv" : ISODate("2017-04-23T05:23:42.276Z"),

                        "pingMs" : NumberLong(0),

                        "syncingTo" : "server2.tommy.com:20001",

                        "configVersion" : 3

                },

                {

                        "_id" : 2,

                        "name" : "server3.tommy.com:20003",

                        "health" : 1,

                        "state" : 2,

                        "stateStr" : "SECONDARY",

                        "uptime" : 59,

                        "optime" : {

                                "ts" : Timestamp(1492925019, 1),

                                "t" : NumberLong(1)

                        },

                        "optimeDurable" : {

                                "ts" : Timestamp(0, 0),

                                "t" : NumberLong(-1)

                        },

                        "optimeDate" : ISODate("2017-04-23T05:23:39Z"),

                        "optimeDurableDate" : ISODate("1970-01-01T00:00:00Z"),

                        "lastHeartbeat" : ISODate("2017-04-23T05:23:41.270Z"),

                        "lastHeartbeatRecv" : ISODate("2017-04-23T05:23:42.329Z"),

                        "pingMs" : NumberLong(0),

                        "syncingTo" : "server2.tommy.com:20001",

                        "configVersion" : 3

                }

        ],

        "ok" : 1

}

server3.tommy.com

> mongo_bin/mongo --port 20001

> rs.initiate()

> rs.add("server1.tommy.com:20003")

> rs.add("server2.tommy.com:20004")

> rs.status()

mongo_bin/mongo --port 20001

[tommy@server3.tommy.com ~]$ mongo_bin/mongo --port 20001

MongoDB shell version v3.4.2

connecting to: mongodb://127.0.0.1:20001/

MongoDB server version: 3.4.2

Server has startup warnings:

2017-04-23T00:38:04.471-0500 I STORAGE  [initandlisten]

2017-04-23T00:38:04.471-0500 I STORAGE  [initandlisten] ** WARNING: Using the XFS filesystem is strongly recommended with the WiredTiger storage engine

2017-04-23T00:38:04.471-0500 I STORAGE  [initandlisten] **          See http://dochub.mongodb.org/core/prodnotes-filesystem

2017-04-23T00:38:04.507-0500 I CONTROL  [initandlisten]

2017-04-23T00:38:04.507-0500 I CONTROL  [initandlisten] ** WARNING: Access control is not enabled for the database.

2017-04-23T00:38:04.508-0500 I CONTROL  [initandlisten] **          Read and write access to data and configuration is unrestricted.

2017-04-23T00:38:04.508-0500 I CONTROL  [initandlisten]

2017-04-23T00:38:04.508-0500 I CONTROL  [initandlisten]

2017-04-23T00:38:04.508-0500 I CONTROL  [initandlisten] ** WARNING: You are running on a NUMA machine.

2017-04-23T00:38:04.508-0500 I CONTROL  [initandlisten] **          We suggest launching mongod like this to avoid performance problems:

2017-04-23T00:38:04.508-0500 I CONTROL  [initandlisten] **              numactl --interleave=all mongod [other options]

2017-04-23T00:38:04.509-0500 I CONTROL  [initandlisten]

2017-04-23T00:38:04.509-0500 I CONTROL  [initandlisten] ** WARNING: /sys/kernel/mm/transparent_hugepage/enabled is 'always'.

2017-04-23T00:38:04.509-0500 I CONTROL  [initandlisten] **        We suggest setting it to 'never'

2017-04-23T00:38:04.509-0500 I CONTROL  [initandlisten]

2017-04-23T00:38:04.509-0500 I CONTROL  [initandlisten] ** WARNING: /sys/kernel/mm/transparent_hugepage/defrag is 'always'.

2017-04-23T00:38:04.509-0500 I CONTROL  [initandlisten] **        We suggest setting it to 'never'

2017-04-23T00:38:04.509-0500 I CONTROL  [initandlisten]

> 

rs.initiate()

> rs.initiate()

{

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

        "me" : "server3.tommy.com:20001",

        "ok" : 1

}

rep3a:SECONDARY>

rep3a:PRIMARY>

rs.add()

> rs.add("server1.tommy.com:20003")

rep3a:PRIMARY> rs.add("server1.tommy.com:20003")

{ "ok" : 1 }

> rs.add("server2.tommy.com:20004")

rep3a:PRIMARY> rs.add("server2.tommy.com:20002")

{ "ok" : 1 }

rs.status()

rep3a:PRIMARY> rs.status()

{

        "set" : "rep3a",

        "date" : ISODate("2017-04-23T06:30:28.523Z"),

        "myState" : 1,

        "term" : NumberLong(1),

        "heartbeatIntervalMillis" : NumberLong(2000),

        "optimes" : {

                "lastCommittedOpTime" : {

                        "ts" : Timestamp(0, 0),

                        "t" : NumberLong(-1)

                },

                "appliedOpTime" : {

                        "ts" : Timestamp(1492929024, 1),

                        "t" : NumberLong(1)

                },

                "durableOpTime" : {

                        "ts" : Timestamp(1492926340, 1),

                        "t" : NumberLong(-1)

                }

        },

        "members" : [

                {

                        "_id" : 0,

                        "name" : "server3.tommy.com:20001",

                        "health" : 1,

                        "state" : 1,

                        "stateStr" : "PRIMARY",

                        "uptime" : 3144,

                        "optime" : {

                                "ts" : Timestamp(1492929024, 1),

                                "t" : NumberLong(1)

                        },

                        "optimeDate" : ISODate("2017-04-23T06:30:24Z"),

                        "electionTime" : Timestamp(1492926340, 2),

                        "electionDate" : ISODate("2017-04-23T05:45:40Z"),

                        "configVersion" : 5,

                        "self" : true

                },

                {

                        "_id" : 1,

                        "name" : "server1.tommy.com:20003",

                        "health" : 1,

                        "state" : 2,

                        "stateStr" : "SECONDARY",

                        "uptime" : 2559,

                        "optime" : {

                                "ts" : Timestamp(1492929024, 1),

                                "t" : NumberLong(1)

                        },

                        "optimeDurable" : {

                                "ts" : Timestamp(0, 0),

                                "t" : NumberLong(-1)

                        },

                        "optimeDate" : ISODate("2017-04-23T06:30:24Z"),

                        "optimeDurableDate" : ISODate("1970-01-01T00:00:00Z"),

                        "lastHeartbeat" : ISODate("2017-04-23T06:30:28.084Z"),

                        "lastHeartbeatRecv" : ISODate("2017-04-23T06:30:24.086Z"),

                        "pingMs" : NumberLong(0),

                        "syncingTo" : "server3.tommy.com:20001",

                        "configVersion" : 5

                },

                {

                        "_id" : 2,

                        "name" : "server2.tommy.com:20004",

                        "health" : 1,

                        "state" : 2,

                        "stateStr" : "SECONDARY",

                        "uptime" : 4,

                        "optime" : {

                                "ts" : Timestamp(1492929024, 1),

                                "t" : NumberLong(1)

                        },

                        "optimeDurable" : {

                                "ts" : Timestamp(0, 0),

                                "t" : NumberLong(-1)

                        },

                        "optimeDate" : ISODate("2017-04-23T06:30:24Z"),

                        "optimeDurableDate" : ISODate("1970-01-01T00:00:00Z"),

                        "lastHeartbeat" : ISODate("2017-04-23T06:30:28.084Z"),

                        "lastHeartbeatRecv" : ISODate("2017-04-23T06:30:24.128Z"),

                        "pingMs" : NumberLong(0),

                        "syncingTo" : "server3.tommy.com:20001",

                        "configVersion" : 5

                }

        ],

        "ok" : 1

}