Installing MongoDB on the CentOS7

1. Environment

Centos7

2 Go to the/usr/local/directory:
Cd/usr/local

3 Create the Tools directory under the current directory:
Mkdir-p Tools

4 enter into the Tools directory:
CD Tools

5 Download the mongodb-linux-x86_64-rhel70-3.2.4.tgz file that matches the CentOS system:
wget https://fastdl.mongodb.org/linux/mongodb-linux-x86_64-rhel70-3.2.4.tgz

6 Unzip the mongodb-linux-x86_64-rhel70-3.2.4.tgz file:
TAR-ZXVF mongodb-linux-x86_64-rhel70-3.2.4.tgz
The mongodb-linux-x86_64-rhel70-3.2.4 folder and the files it belongs to are obtained after the decompression is completed;

7 Rename the mongodb-linux-x86_64-rhel70-3.2.4 file to mongodb3.2.4:
MV mongodb-linux-x86_64-rhel70-3.2.4 mongodb3.2.4

8 go back to the top level directory and create the MongoDB directory:
Cd.. /
Mkdir-p MongoDB

9 Move the mongodb3.2.4 file from the/usr/local/tools directory to the/usr/local/mongodb directory:
MV tools/mongodb3.2.4/mongodb/

10 enter into the/usr/local/mongodb/mongodb3.2.4 directory:
CD mongodb/mongodb3.2.4

11 Create a directory in the/usr/local/mongodb/mongodb3.2.4/bin/directory that holds the log:
Mkdir-p Data/test/logs

12 Create a directory in the/usr/local/mongodb/mongodb3.2.4/bin/directory that holds the data files:
Mkdir-p data/test/db

13 Enter the Bin directory:
CD bin/

14 Creating the configuration file mongodb.conf:
VI mongodb.conf

Write the following in mongodb.conf:
# idae-mongodb Config start-2016-05-02

# Set up directory for data files
DBPath =/usr/local/mongodb/mongodb3.2.4/bin/data/test/db

# Set the directory where the log files are stored and their log file names
LogPath =/usr/local/mongodb/mongodb3.2.4/bin/data/test/logs/mongodb.log

# Set the port number (the default port number is 27017)
Port = 27017

# set to run as daemon, i.e. run in background
Fork = True

# Nohttpinterface = True
Nohttpinterface = True
# idae-mongodb Config end-2016-05-02

Save and Exit by ": Wq" in the English state;

Parameter explanation:
--dbpath database path (data file)
--logpath log file path
--master designated as the main machine
--slave specified as Slave machine
--source Specify the IP address of the host machine
--POLOGSIZE specifies that the log file size does not exceed 64M. Because Resync is very large and time-consuming, it is best to avoid resync by setting a sufficiently large oplogsize (the default oplog size is 5% of the size of the free disk).
--logappend at the end of the log file, that is, write the log using the Append method
--journal Enable logging
--port Enable port numbers
--fork running in the background
--ONLY specifies which database to replicate only
--slavedelay refers to the time interval from which replication is detected
--auth If you need to verify permissions login (username and password)
--syncdelay data written to hard disk (seconds), 0 is not waiting, write directly
--notablescan table Scan not allowed
--maxconns Maximum number of concurrent connections, default 2000
--PIDFILEPATH Specifies the process file, does not specify that no process file is generated
--BIND_IP bind IP, bind only IP Access service after binding

15 Start MongoDB Service:
15.1 start with a custom MongoDB configuration file:
./mongod--config mongodb.conf
15.2 start MongoDB in Repair mode:
./mongod--repair-f mongodb.conf
15.3 Start in parametric style:
./mongod/usr/local/mongodb/mongodb3.2.4/bin/mongod--dbpath=/usr/local/mongodb/mongodb3.2.4/bin/data/test/db-- Logpath=/usr/local/mongodb/mongodb3.2.4/bin/data/test/logs/mongodb.log--fork
If the following error is reported:
Error:child process failed, exited with error number 1
It is possible that the path inconsistency problem is configured in mongodb.conf;
If the following error is reported:
Error:child process failed, exited with error number 100
It is likely that there is no normal shutdown, so you can delete the Mongod.lock file

15 Viewing the MongoDB process:
PS aux |grep MongoDB

16 viewing the running logs for MongoDB services:
Tail-200f/usr/local/mongodb/mongodb3.2.4/bin/data/test/logs/mongodb.log

17 Check if the port has been started:
NETSTAT-LANP | grep 27017

18 to kill the MongoDB process, you can close the MongoDB service:
Kill-15 PID
PID can be found through step 16

19 If the following conditions occur
warning:failed to connect to 127.0.0.1:27017, reason:errno:111 Connection refused

There are two ways to solve this:
18.1 If the database appears to be unable to connect the reason, may be the data directory under the Mongod.lock file problem, can be repaired with the following command:
./bin/mongod--repair
18.2 or delete Mongod.lock directly
Rm-f/usr/local/mongodb/data/db/mongod.lock
Then start the MongoDB service:
./mongod--config mongodb.conf
If the above two is still not resolved, it is the path file, we can delete the/usr/local/mongodb/mongodb3.2.4/bin/data directory and its subdirectories, and take the absolute path way:
./mongod/usr/local/mongodb/mongodb3.2.4/bin/mongod--dbpath=/usr/local/mongodb/mongodb3.2.4/bin/data/test/db-- Logpath=/usr/local/mongodb/mongodb3.2.4/bin/data/test/logs/mongodb.log--fork

20 Add the MongoDB service to the self-boot file:
Vi/etc/rc.local
Append the following command to the end of the file:
/usr/local/mongodb/mongodb3.2.4/bin/mongod--config mongodb.conf
Save and exit:
: wq!

21 Common commands for clients:
Db.version (); # View the MongoDB version
Use test; # into the specified data, here is the test database

22 in the/usr/local/mongodb/mongodb3.2.4/bin/directory, type the following command, open a MONGODB client program, open a MongoDB shell client, the shell client is also a Java Script Editor, you can enter any JavaScript scripts:
./mongo
Connect to test database by default

23 Enter ip:27017 in the browser, such as:
http://101.201.212.129:27017/
Can view the version information of MongoDB;

Installing MongoDB on the CentOS7