MongoDB
Replicaset installation on VMs
1.
Create 3 VMs and install RHEL
[root@node2 ~]# uname -a
Linux node2.rs05.mongodb 2.6.32-504.el6.x86_64 #1 SMP Tue Sep 16
01:56:35 EDT 2014 x86_64 x86_64 x86_64 GNU/Linux
[root@node2 ~]#
2.
Add static IP ( Private IP in our case) to all
the 3VMs
[root@node2 ~]# more /etc/sysconfig/network-scripts/ifcfg-eth0
DEVICE=eth0
TYPE=Ethernet
ONBOOT=yes
NM_CONTROLLED=yes
BOOTPROTO=static
IPADDR=192.168.0.45
NETMAST=255.255.255.0
GATEWAY=192.168.0.1
DNS1=192.168.0.1
[root@node2 ~]#
3.
Assign hostname to all the 3VMs in
/etc/sysconfig/network file.
[root@node2 ~]# hostname
node2.rs05.mongodb
[root@node2 ~]#
4.
Map 3VMs static IP and hostname details in the
/etc/hosts file
[root@node1 ~]# more /etc/hosts
127.0.0.1 localhost
localhost.localdomain localhost4 localhost4.localdomain4
::1 localhost
localhost.localdomain localhost6 localhost6.localdomain6
192.168.0.44
node1.rs05.mongodb
192.168.0.45
node2.rs05.mongodb
192.168.0.46
node3.rs05.mongodb
[root@node1 ~]#
5.
Disable the firewall (iptables) /etc/sysconfig/iptables
[root@node1 ~]# service iptables stop
iptables: Setting chains to policy ACCEPT: filter [
OK ]
iptables: Flushing firewall rules: [ OK ]
iptables: Unloading modules: [ OK ]
[root@node1 ~]#
6.
Download MongoDB tar package and extract it and
rename as mongodb
[root@node1 ~]# ll
total 44
-rw-------. 1 root root
1385 Mar 13 23:40 anaconda-ks.cfg
-rw-r--r--. 1 root root 28054 Mar 13 23:40 install.log
-rw-r--r--. 1 root root
7572 Mar 13 23:40 install.log.syslog
drwxr-xr-x. 3 root root
4096 Mar 14 03:20 mongo
7.
Create new mongodb folder under
/usr/local/mongodb and copy mongo contents into it.
[root@node1 local]# ll mongodb/
total 100
drwxr-xr-x. 2 root root
4096 Mar 14 03:28 bin
-rw-r--r--. 1 root root 34520 Mar 14 03:28 GNU-AGPL-3.0
-rw-r--r--. 1 root root 16726 Mar 14 03:28 MPL-2
-rw-r--r--. 1 root root
1359 Mar 14 03:28 README
-rw-r--r--. 1 root root 35910 Mar 14 03:28 THIRD-PARTY-NOTICES
[root@node1 local]#
8.
Create configuration file under /etc/mongo.conf
and all db, log, replicaset and mongo.pid details.
[root@node1 local]# more /etc/mongodb.conf
logpath=/var/log/mongodb/mongod.log
logappend=true
fork=true
port=27017
dbpath=/var/lib/mongodb
pidfilepath=/var/run/mongodb/mongod.pid
replSet=RS05
oplogSize=1024
[root@node1 local]#
9.
Add mongodb binaries into PATH variable in bash profile file
[root@node1 local]# more ~/.bash_profile
# .bash_profile
# Get the aliases and functions
if [ -f ~/.bashrc ]; then
. ~/.bashrc
fi
# User specific environment and startup programs
PATH=$PATH:$HOME/bin:/usr/local/mongodb/bin
export PATH
[root@node1 local]#
10.
Start the mongod instance in all the VMs (nodes)
[root@node1 local]# mongod -f /etc/mongodb.conf
about to fork child process, waiting until server is ready for
connections.
forked process: 4631
child process started successfully, parent exiting
[root@node1 local]#
11.
Start the mongo in node one and add the
remaining 2 nodes into the replica set.
$mongo
> config={_id:"RS05", members:[{_id:0,
host:"node1.rs05.mongodb:27017", priority:3}, {_id:1,
host:"node2.rs05.mongodb:27017", priority:2}, {_id:2,
host:"node3.rs05.mongodb:27017", priority:1}]}
> rs.initiate(config)
>rs.status()
RS05:PRIMARY> rs.status()
{
"set" :
"RS05",
"date" :
ISODate("2016-03-15T09:32:19.938Z"),
"myState" : 1,
"term" :
NumberLong(4),
"heartbeatIntervalMillis" : NumberLong(2000),
"members" : [
{
"_id" : 0,
"name" : "node1.rs05.mongodb:27017",
"health" : 1,
"state" : 1,
"stateStr" : "PRIMARY",
"uptime" : 180,
"optime" : {
"ts" : Timestamp(1458034175, 2),
"t" : NumberLong(4)
},
"optimeDate" : ISODate("2016-03-15T09:29:35Z"),
"electionTime" :
Timestamp(1458034175, 1),
"electionDate" : ISODate("2016-03-15T09:29:35Z"),
"configVersion" : 1,
"self" : true
},
{
"_id" : 1,
"name" : "node2.rs05.mongodb:27017",
"health" : 1,
"state" : 2,
"stateStr" : "SECONDARY",
"uptime" : 179,
"optime" : {
"ts" : Timestamp(1458034175, 2),
"t" : NumberLong(4)
},
"optimeDate" : ISODate("2016-03-15T09:29:35Z"),
"lastHeartbeat" :
ISODate("2016-03-15T09:32:19.432Z"),
"lastHeartbeatRecv" :
ISODate("2016-03-15T09:32:19.544Z"),
"pingMs" : NumberLong(0),
"syncingTo" : "node1.rs05.mongodb:27017",
"configVersion" : 1
},
{
"_id" : 2,
"health" : 1,
"state" : 2,
"stateStr" : "SECONDARY",
"uptime" : 179,
"optime" : {
"ts" : Timestamp(1458034175, 2),
"t" :
NumberLong(4)
},
"optimeDate" : ISODate("2016-03-15T09:29:35Z"),
"lastHeartbeat" :
ISODate("2016-03-15T09:32:19.432Z"),
"lastHeartbeatRecv" :
ISODate("2016-03-15T09:32:19.545Z"),
"pingMs" : NumberLong(0),
"syncingTo" : "node1.rs05.mongodb:27017",
"configVersion" : 1
}
],
"ok" : 1
}
RS05:PRIMARY>
12.
Now the replica set is ready to play.
