==----------------------------------------------------------------------------------------------------------------------
-----== mongoDB的安装及简单的增删改查操作
1、下载安装包资源
官网：https://www.mongodb.com/download-center/community
版本：mongodb-linux-x86_64-4.0.11.tgz
2、资源放指定目录，解压文件
cd /mine/software/mongodb-4.0.11
tar -zxvf mongodb-linux-x86_64-4.0.11.tgz
3、将解压后的文件下的bin目录，复制到你服务目录（自己定义的目录）
服务目录：/mine/serve/
创建新服务目录：mkdir mongodb
复制文件：rsync -a bin /mine/serve/mongodb
4、进入到MongoDB服务目录下，创建数据目录和日志文件
cd /mine/serve/mongodb
mkdir data
touch dblogs 【注意：这里一定是个文件，不是目录】
5、进入到mongodb服务下的bin目录，进行启动
cd /bin
./mongod --dbpath=/mine/serve/mongodb/data --logpath=/mine/serve/mongodb/dblogs
执行，有时候会报错，如：
[root@iZm5eizpokikoertia0x31Z bin]# ./mongod --dbpath=/mine/serve/mongodb/data --logpath=/mine/serve/mongodb/dblogs
2019-08-05T15:06:56.792+0800 I CONTROL [main] log file "/mine/serve/mongodb/dblogs" exists; moved to "/mine/serve/mongodb/dblogs.2019-08-05T07-06-56".
^C
加个--fork，放在后台执行，试试：./mongod --dbpath=/mine/serve/mongodb/data --logpath=/mine/serve/mongodb/dblogs --fork
[root@iZm5eizpokikoertia0x31Z bin]# ./mongod --dbpath=/mine/serve/mongodb/data --logpath=/mine/serve/mongodb/dblogs --fork
about to fork child process, waiting until server is ready for connections.
forked process: 11794
child process started successfully, parent exiting
至此mongodb启动成功！
注：通常情况，加--fork和不加--fork的区别在于，不加，需要开启一个MongoDB启动窗口。
6、查看相关进程 pstree -p | grep mongod
[root@iZm5eizpokikoertia0x31Z bin]# pstree -p | grep mongod
|-mongod(11794)-+-{mongod}(11795)
| |-{mongod}(11796)
| |-{mongod}(11802)
| |-{mongod}(11803)
| |-{mongod}(11804)
| |-{mongod}(11805)
| |-{mongod}(11806)
| |-{mongod}(11807)
| |-{mongod}(11808)
| |-{mongod}(11809)
| |-{mongod}(11810)
| |-{mongod}(11811)
| |-{mongod}(11812)
| |-{mongod}(11813)
| |-{mongod}(11814)
| |-{mongod}(11815)
| |-{mongod}(11816)
| |-{mongod}(11817)
| |-{mongod}(11818)
| |-{mongod}(11819)
| |-{mongod}(11820)
| |-{mongod}(11821)
| `-{mongod}(11822)
注意：通过以上我们可以看到主进程11794。
7、将mongodb启动放到开机启动，方便日后操作
开机启动文件：/etc/rc.local
重新拼接mongo启动命令：/mine/serve/mongodb/bin/mongod --dbpath=/mine/serve/mongodb/data --logpath=/mine/serve/mongodb/dblogs --fork
加入文件：
#!/bin/bash
# THIS FILE IS ADDED FOR COMPATIBILITY PURPOSES
#
# It is highly advisable to create own systemd services or udev rules
# to run scripts during boot instead of using this file.
#
# In contrast to previous versions due to parallel execution during boot
# this script will NOT be run after all other services.
#
# Please note that you must run 'chmod +x /etc/rc.d/rc.local' to ensure
# that this script will be executed during boot.
touch /var/lock/subsys/local
/mine/serve/mongodb/bin/mongod --dbpath=/mine/serve/mongodb/data --logpath=/mine/serve/mongodb/dblogs --fork
8、若想停止mongodb，如何进行操作
killall mongod
pkill mongod
kill -9 mongod (这种方式，是不推荐的，因为如果使用这种方式，有可能，停止后，就起不来了。解决方法：删除data目录下的mongod.lock,再重启！)
killall mongod关闭，启动
[root@iZm5eizpokikoertia0x31Z bin]# killall mongod
[root@iZm5eizpokikoertia0x31Z bin]# pstree -p | grep mongod
[root@iZm5eizpokikoertia0x31Z bin]# ls
bsondump install_compass mongo mongod mongodump mongoexport mongofiles mongoimport mongoreplay mongorestore mongos mongostat mongotop
[root@iZm5eizpokikoertia0x31Z bin]# ./mongod --dbpath=/mine/serve/mongodb/data/ --logpath=/mine/serve/mongodb/dblogs --fork
about to fork child process, waiting until server is ready for connections.
forked process: 13848
child process started successfully, parent exiting
[root@iZm5eizpokikoertia0x31Z bin]# pstree -p | grep mongod
|-mongod(13848)-+-{mongod}(13849)
| |-{mongod}(13850)
| |-{mongod}(13857)
| |-{mongod}(13858)
| |-{mongod}(13859)
| |-{mongod}(13860)
| |-{mongod}(13861)
| |-{mongod}(13862)
| |-{mongod}(13863)
| |-{mongod}(13864)
| |-{mongod}(13865)
| |-{mongod}(13866)
| |-{mongod}(13867)
| |-{mongod}(13868)
| |-{mongod}(13870)
| |-{mongod}(13871)
| |-{mongod}(13872)
| |-{mongod}(13873)
| |-{mongod}(13874)
| |-{mongod}(13875)
| |-{mongod}(13876)
| |-{mongod}(13877)
| `-{mongod}(13878)
[root@iZm5eizpokikoertia0x31Z bin]#
kill -9 关闭，启动
[root@iZm5eizpokikoertia0x31Z data]# kill -9 13848
[root@iZm5eizpokikoertia0x31Z data]# pstree -p | grep mongod
[root@iZm5eizpokikoertia0x31Z data]# cd ../bin/
[root@iZm5eizpokikoertia0x31Z bin]# ./mongod --dbpath=/mine/serve/mongodb/data/ --logpath=/mine/serve/mongodb/dblogs --fork
about to fork child process, waiting until server is ready for connections.
forked process: 14065
child process started successfully, parent exiting
[root@iZm5eizpokikoertia0x31Z bin]# pstree -p | grep mongod
|-mongod(14065)-+-{mongod}(14066)
| |-{mongod}(14067)
| |-{mongod}(14072)
| |-{mongod}(14073)
| |-{mongod}(14074)
| |-{mongod}(14075)
| |-{mongod}(14076)
| |-{mongod}(14077)
| |-{mongod}(14078)
| |-{mongod}(14079)
| |-{mongod}(14080)
| |-{mongod}(14081)
| |-{mongod}(14082)
| |-{mongod}(14084)
| |-{mongod}(14085)
| |-{mongod}(14086)
| |-{mongod}(14087)
| |-{mongod}(14088)
| |-{mongod}(14089)
| |-{mongod}(14090)
| |-{mongod}(14091)
| |-{mongod}(14092)
| `-{mongod}(14093)
[root@iZm5eizpokikoertia0x31Z bin]# cd ../data/
[root@iZm5eizpokikoertia0x31Z data]# ls
collection-0--2740207084622415070.wt index-1--2740207084622415070.wt journal storage.bson WiredTiger.turtle
collection-2--2740207084622415070.wt index-3--2740207084622415070.wt _mdb_catalog.wt WiredTiger WiredTiger.wt
collection-4--2740207084622415070.wt index-5--2740207084622415070.wt mongod.lock WiredTigerLAS.wt
diagnostic.data index-6--2740207084622415070.wt sizeStorer.wt WiredTiger.lock
9、登录mongodb数据库
cd /mine/serve/mongodb/bin
./mongo
这时，应该就进入到mongodb数据库了。
[root@iZm5eizpokikoertia0x31Z bin]# ./mongo
MongoDB shell version v4.0.11
connecting to: mongodb://127.0.0.1:27017/?gssapiServiceName=mongodb
Implicit session: session { "id" : UUID("7b5e2f0b-5b6e-4460-9255-71382a7b60c7") }
MongoDB server version: 4.0.11
Welcome to the MongoDB shell.
For interactive help, type "help".
For more comprehensive documentation, see
http://docs.mongodb.org/
Questions? Try the support group
http://groups.google.com/group/mongodb-user
Server has startup warnings:
2019-08-05T15:54:24.793+0800 I STORAGE [initandlisten]
2019-08-05T15:54:24.793+0800 I STORAGE [initandlisten] ** WARNING: Using the XFS filesystem is strongly recommended with the WiredTiger storage engine
2019-08-05T15:54:24.793+0800 I STORAGE [initandlisten] ** See http://dochub.mongodb.org/core/prodnotes-filesystem
2019-08-05T15:54:25.890+0800 I CONTROL [initandlisten]
2019-08-05T15:54:25.890+0800 I CONTROL [initandlisten] ** WARNING: Access control is not enabled for the database.
2019-08-05T15:54:25.890+0800 I CONTROL [initandlisten] ** Read and write access to data and configuration is unrestricted.
2019-08-05T15:54:25.890+0800 I CONTROL [initandlisten] ** WARNING: You are running this process as the root user, which is not recommended.
2019-08-05T15:54:25.890+0800 I CONTROL [initandlisten]
2019-08-05T15:54:25.890+0800 I CONTROL [initandlisten] ** WARNING: This server is bound to localhost.
2019-08-05T15:54:25.890+0800 I CONTROL [initandlisten] ** Remote systems will be unable to connect to this server.
2019-08-05T15:54:25.890+0800 I CONTROL [initandlisten] ** Start the server with --bind_ip to specify which IP
2019-08-05T15:54:25.890+0800 I CONTROL [initandlisten] ** addresses it should serve responses from, or with --bind_ip_all to
2019-08-05T15:54:25.890+0800 I CONTROL [initandlisten] ** bind to all interfaces. If this behavior is desired, start the
2019-08-05T15:54:25.890+0800 I CONTROL [initandlisten] ** server with --bind_ip 127.0.0.1 to disable this warning.
2019-08-05T15:54:25.890+0800 I CONTROL [initandlisten]
2019-08-05T15:54:25.890+0800 I CONTROL [initandlisten]
2019-08-05T15:54:25.890+0800 I CONTROL [initandlisten] ** WARNING: soft rlimits too low. rlimits set to 1834 processes, 65535 files. Number of processes should be at least 32767.5 : 0.5 times number of files.
>
查看数据库；show dbs
> show dbs
admin 0.000GB
config 0.000GB
local 0.000GB
查看当前数据库：db
> db
test
查看当前库的表或集合：show tables | show collections
> show collections; (无数据)
> show tables; (无数据)
插入一条数据：db.c1.insert({name:"zhangsan",age:"29"});
> db.c1.insert({name:"LDR",age:"29"});
WriteResult({ "nInserted" : 1 })
这个时候，我们查看一下数据库：
> show dbs;
admin 0.000GB
config 0.000GB
local 0.000GB
test 0.000GB
发现多了一个test库，这是为什么呢？原来mongodb的数据库是隐式的，默认是看不到test库的。
查看数据：
> db.c1.find();
{ "_id" : ObjectId("5d47e64862a767ca65d70324"), "name" : "LDR", "age" : "29" }
再添加一条数据：
db.c1.insert({name:"SXL",age:"28",gender:"female",home:"TianShui"});
> db.c1.insert({name:"SXL",age:"28",gender:"female",home:"TianShui"});
WriteResult({ "nInserted" : 1 })
> db.c1.find();
{ "_id" : ObjectId("5d47e64862a767ca65d70324"), "name" : "LDR", "age" : "29" }
{ "_id" : ObjectId("5d47e7de62a767ca65d70325"), "name" : "SXL", "age" : "28", "gender" : "female", "home" : "TianShui" }
删除数据：db.c1.remove({name:"SB"});
> db.c1.insert({name:"SB",age:"0"});
WriteResult({ "nInserted" : 1 })
> db.c1.find();
{ "_id" : ObjectId("5d47e64862a767ca65d70324"), "name" : "LDR", "age" : "29" }
{ "_id" : ObjectId("5d47e7de62a767ca65d70325"), "name" : "SXL", "age" : "28", "gender" : "female", "home" : "TianShui" }
{ "_id" : ObjectId("5d47e9759db9b635a6868272"), "name" : "SB", "age" : "0" }
> db.c1.remove({name:"SB"});
WriteResult({ "nRemoved" : 1 })
> db.c1.find();
{ "_id" : ObjectId("5d47e64862a767ca65d70324"), "name" : "LDR", "age" : "29" }
{ "_id" : ObjectId("5d47e7de62a767ca65d70325"), "name" : "SXL", "age" : "28", "gender" : "female", "home" : "TianShui" }
更改数据：db.c1.update({name:"GF"},{gender:"male"});
> db.c1.insert({name:"GF",age:"30",gender:"female"});
WriteResult({ "nInserted" : 1 })
> db.c1.find();
{ "_id" : ObjectId("5d47e64862a767ca65d70324"), "name" : "LDR", "age" : "29" }
{ "_id" : ObjectId("5d47e7de62a767ca65d70325"), "name" : "SXL", "age" : "28", "gender" : "female", "home" : "TianShui" }
{ "_id" : ObjectId("5d47ea029db9b635a6868273"), "name" : "GF", "age" : "30", "gender" : "female" }
> db.c1.update({name:"GF"},{gender:"male"});
WriteResult({ "nMatched" : 1, "nUpserted" : 0, "nModified" : 1 })
> db.c1.find();
{ "_id" : ObjectId("5d47e64862a767ca65d70324"), "name" : "LDR", "age" : "29" }
{ "_id" : ObjectId("5d47e7de62a767ca65d70325"), "name" : "SXL", "age" : "28", "gender" : "female", "home" : "TianShui" }
{ "_id" : ObjectId("5d47ea029db9b635a6868273"), "gender" : "male" }
----------------------------------------------------------------------------------------------------------------------==
