分布式文件存储数据库 MongoDB

# 创建 mongodb 目录
mkdir -p /usr/local/mongodb
# 解压 mongodb 至指定目录
tar -zxvf /usr/local/src/mongodb-linux-x86_64-rhel70-4.4.1.tgz -C /usr/local/
# 重命名解压目录为 mongodb
mv /usr/local/mongodb-linux-x86_64-rhel70-4.4.1/ /usr/local/mongodb

# 创建存放数据的目录
mkdir -p /usr/local/mongodb/data/db
# 创建存放日志的目录
mkdir -p /usr/local/mongodb/logs
# 创建日志记录文件
touch /usr/local/mongodb/logs/mongodb.log

# 切换至指定目录
cd /usr/local/mongodb/
# 前台启动
bin/mongod --dbpath /usr/local/mongodb/data/db/ --logpath /usr/local/mongodb/logs/mongodb.log --logappend --port 27017 --bind_ip 0.0.0.0

# 后台启动
bin/mongod --dbpath /usr/local/mongodb/data/db/ --logpath /usr/local/mongodb/logs/mongodb.log --logappend --port 27017 --bind_ip 0.0.0.0 --fork

# 数据文件存放目录
dbpath = /usr/local/mongodb/data/db
# 日志文件存放目录
logpath = /usr/local/mongodb/logs/mongodb.log
# 以追加的方式记录日志
logappend = true
# 端口默认为 27017
port = 27017
# 对访问 IP 地址不做限制，默认为本机地址
bind_ip = 0.0.0.0
# 以守护进程的方式启用，即在后台运行
fork = true

# 切换至指定目录
cd /usr/local/mongodb/
# 指定配置文件的方式启动服务
bin/mongod -f bin/mongodb.conf

[root@localhost mongodb]# bin/mongo
MongoDB shell version v4.4.1
connecting to: mongodb://127.0.0.1:27017/?compressors=disabled&gssapiServiceName=mongodb
Implicit session: session { "id" : UUID("2bf54fad-83bc-444c-8bee-166a224445b8") }
MongoDB server version: 4.4.1
---
The server generated these startup warnings when booting: 
        2020-10-21T10:47:44.855+08:00: ***** SERVER RESTARTED *****
        2020-10-21T10:47:47.024+08:00: Access control is not enabled for the database. Read and write access to data and configuration is unrestricted
        2020-10-21T10:47:47.024+08:00: You are running this process as the root user, which is not recommended
        2020-10-21T10:47:47.024+08:00: /sys/kernel/mm/transparent_hugepage/enabled is 'always'. We suggest setting it to 'never'
        2020-10-21T10:47:47.024+08:00: /sys/kernel/mm/transparent_hugepage/defrag is 'always'. We suggest setting it to 'never'
        2020-10-21T10:47:47.024+08:00: Soft rlimits too low
        2020-10-21T10:47:47.024+08:00:         currentValue: 1024
        2020-10-21T10:47:47.024+08:00:         recommendedMinimum: 64000
---
---
        Enable MongoDB's free cloud-based monitoring service, which will then receive and display
        metrics about your deployment (disk utilization, CPU, operation statistics, etc).
        The monitoring data will be available on a MongoDB website with a unique URL accessible to you
        and anyone you share the URL with. MongoDB may use this information to make product
        improvements and to suggest MongoDB products and deployment options to you.
        To enable free monitoring, run the following command: db.enableFreeMonitoring()
        To permanently disable this reminder, run the following command: db.disableFreeMonitoring()
---
> 

> help
	db.help()                    help on db methods
	db.mycoll.help()             help on collection methods
	sh.help()                    sharding helpers
	rs.help()                    replica set helpers
	help admin                   administrative help
	help connect                 connecting to a db help
	help keys                    key shortcuts
	help misc                    misc things to know
	help mr                      mapreduce
	show dbs                     show database names
	show collections             show collections in current database
	show users                   show users in current database
	show profile                 show most recent system.profile entries with time >= 1ms
	show logs                    show the accessible logger names
	show log [name]              prints out the last segment of log in memory, 'global' is default
	use <db_name>                set current database
	db.mycoll.find()             list objects in collection mycoll
	db.mycoll.find( { a : 1 } )  list objects in mycoll where a == 1
	it                           result of the last line evaluated; use to further iterate
	DBQuery.shellBatchSize = x   set default number of items to display on shell
	exit                         quit the mongo shell

> db.version()
4.4.1

> show dbs
admin   0.000GB
config  0.000GB
local   0.000GB

# 命令启动方式的关闭
bin/mongod --dbpath /usr/local/mongodb/data/db/ --logpath /usr/local/mongodb/logs/mongodb.log --logappend --port 27017 --bind_ip 0.0.0.0 --fork --shutdown
# 配置文件启动方式的关闭
bin/mongod -f bin/mongodb.conf --shutdown

# 查看 mongodb 运行的进程信息
ps -ef | grep mongodb
# kill -9 强制关闭
kill -9 pid

# 连接 mongodb
bin/mongo
# 切换 admin 数据库
use admin
# 执行以下函数(2选1)即可关闭服务
db.shutdownServer()
db.runCommand(“shutdown”)

# 添加环境变量
export MONGODB_HOME=/usr/local/mongodb
export PATH=$PATH:$MONGODB_HOME/bin