CentOS7.2 64 bit installation of mongodb4 4.1 (detailed)
Here, I use yum to install automatically. I strongly don't recommend Xiaobai to decompress the compressed package for automatic installation. There are too many pits!
Introduction to environment variable path
- mongodb bin directory: / etc
- dbpath of mongodb: / var/lib/mongo
- logpath of mongodb: / var / log / mongodb / mongod log
- config path of mongodb: / etc
Remind you to replace the command with the corresponding directory of your mongodb!
yum install
Connect to the server through the connection tool. I recommend terminal or terminus on the mac side and XShell on the window side. Of course, you can find the version that doesn't charge!
1, Configure the yum source for mongodb
This is equivalent to configuring the way for yum to obtain the mongodb installation package, and setting the version information of the obtained installation package at the same time!
1. New mongodb-org-4.4 Repo file
vim /etc/yum.repos.d/mongodb-org-4.4.repo
2. Edit mongodb-org-4.4 Repo file
Press i to enter inster mode (prompt in the lower left corner) and enter
[mongodb-org-4.4] name=MongoDB Repository baseurl=https://repo.mongodb.org/yum/redhat/$releasever/mongodb-org/4.4/x86_64/ gpgcheck=1 enabled=1 gpgkey=https://www.mongodb.org/static/pgp/server-4.4.asc
Press the esc key in the upper left corner of the keyboard to exit the editing mode, then press: wq (prompt in the lower left corner) in English, and then press enter to save and exit.
2, Install using yum or up2date
Start to install some tools related to mongodb. If there is no problem, there will be a complete one at last, because the word indicates that the installation is successful!
sudo yum install -y mongodb-org-4.4.1 mongodb-org-server-4.4.1 mongodb-org-shell-4.4.1 mongodb-org-mongos-4.4.1 mongodb-org-tools-4.4.1
3, Encounter problems
If you don't make any mistakes in the above steps, you can skip this part. I just stepped on a lot of holes!
1. Run the yum install command and the error is as follows: File contains no section headersXXX
The best way to solve this problem is to check the yum source file of mongodb configuration. If yes, delete yum repos. D module and download and install again!
delete
rm -f /etc/yum.repos.d/
Download the image again
wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo
Clean cache
yum clean all
After doing so, execute sudo yum install -y mongodb-org-4.4.1 mongodb-org-server-4.4.1 mongodb-org-shell-4.4.1 mongodb-org-mongos-4.4.1 mongodb-org-tools-4.4.1 again to install mongodb through yum!
Startup, shutdown and restart of mongodb
1. Start
sudo systemctl start mongod
/usr/bin/mongod --config /etc/mongod.conf / / startup method after user creation
The unsuccessful startup is largely due to mongodb's lack of dbpath and logpath permissions
sudo chown -R mongod:mongod /var/lib/mongo sudo chown -R mongod:mongod /var/log/mongodb
2. Close
sudo systemctl stop mongod
mongod --shutdown --dbpath /var/lib/mongo / / set the shutdown mode after the user
3. Restart
sudo systemctl restart mongod
4. Startup and self startup
sudo systemctl enable mongod
5. Check the startup status
sudo systemctl status mongod
6. Repair mongodb
Using kill-9 to forcibly shut down, mongodb cannot be started to a large extent. You can use this command to repair mongodb. It's really difficult!
/usr/bin/mongod -f /etc/mongod.conf --repair
Simple operation of mongodb
Operating database in command line mode
mongo //Enter database
show dbs //Show all databases
use admin //Using the action admin Library
show collections //Show all tables in the library
db.createCollection("theme") //Create a theme table in the library
db.theme.insert({"id":"184820911","navbar": "red","num": 9,"fashion":["blue","gold","pink"]}) //Input a record in the table
db.news.drop() //Delete news table
db.dropDatabase() //Delete database
db.users.update({"id": "xxx"},{$set:{"name": "huasen"}}) //Update data in users table
db.school.findOne({"id":3}) //Find in the school table
db.createUser({user:"user name",pwd:"password",roles:[{role:"root",db:"admin"}]}) // Create user
use test // Jump to the database where you want to add users
db.createUser({
user: 'fooadmin', // user name
pwd: '123456', // password
roles:[{
role: 'readWrite', // role
db: 'test' // Database name
}]
})
show users // View users under the current library
db.dropUser('testadmin') // delete user
db.updateUser('admin', {pwd: '654321'}) // Modify user password
db.auth('admin', '654321') // Password authentication
sudo chown -R mongod:mongod /var/lib/mongo
sudo chown -R mongod:mongod /var/log/mongodb
/usr/bin/mongod --config /etc/mongod.conf //Startup method after user creation
mongod --shutdown --dbpath /var/lib/mongo //Set the user's closing method
Export import data
mongoexport -d admin -c theme -o /data/backup/theme.json //Back up the data in the theme table in the admin library to theme JSON file mongoimport -d admin -c themecopy --file /data/backup/theme.json //From theme The imported data in the JSON file enters the themecopy table in the admin library
Backup recovery
mongodump -d admin -o /data/backup/mongodb //Backup data mongorestore -d admincopy --dir=/data/backup/admin //Recover data
Troubleshooting of browser connection failure
This problem has tormented me for a long time. It involves a wide range of problems and needs patient investigation!
Successful examples
Access through the browser: ip:27017. The default port of mongodb is 27017.
Troubleshooting process
Through the following steps for troubleshooting, I hope I can give you more help!
1. Check whether there are mongo related programs running on port 27017 of linux
View all current Ports - ntlp, view all current ports!
2. Check whether the corresponding security group port of the server is enabled
The specific operation depends on your Alibaba cloud or Tencent cloud operation
Both outbound and inbound rules should open the port 27017. It depends on how your server is set up!
Let's refer to my own settings
3. Check whether the server firewall is open
Check whether the server has restrictions on the ports of the firewall. I'm simple and rude. Close the firewall directly!
systemctl disable firewalld.service systemctl stop firewalld.service setenforce 0
Or directly check the opening of the port
firewall-cmd --query-port=27017/tcp // Check the firewall settings of port 27017 under tcp protocol firewall-cmd --list-ports // View all ports systemctl stop firewalld // Turn off the firewall firewall-cmd --add-port=27017/tcp // Turn off firewall restrictions on 27017
The problem of firewall is not very good. Different versions of CentOS use different firewall applications. It depends on your play. Welcome to teach me!
4. Check the bind of mongodb_ IP attribute
bind_ The default IP attribute is 127.0.0.1. By default, it only supports application access in the server, so we can't connect by entering the connection port number in the browser. I directly modified it to make all applications can access the connection! Is to bind_ If the IP attribute is set to 0.0.0.0, the problem arises. How can mongodb be found through mongodb installed by yum Config file. Generally speaking, the default path of packages installed using yum rpm is as follows:
| route | Document storage description |
|---|---|
| /etc | Directory of some installation package configuration files |
| /usr/bin | Executable files of some installation packages |
| /usr/lib | Some programs use dynamic function libraries |
| /usr/share/doc | Some basic software manuals and help documents |
Sure enough, I found the file!
Start to modify and save, and you will be able to access it successfully! If not, I can't help you. I suggest reopening!
Message
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support
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