一、安装源
配置yum源
1.备份原yum库文件并将新配置写入repo文件

[root@localhost ~]# mv /etc/yum.repos.d/ /etc/yum.repos.d-bak
[root@localhost ~]# mkdir /etc/yum.repos.d
[root@localhost ~]# echo -e "[kunpeng]\nname=CentOS-kunpeng - Base - mirrors.huaweicloud.com\nbaseurl=https://mirrors.huaweicloud.com/kunpeng/yum/el/7/aarch64/\ngpgcheck=0\nenabled=1" > /etc/yum.repos.d/CentOS-Base-kunpeng.repo

2.确认上一步操作写入成功

[root@localhost ~]# cat /etc/yum.repos.d/CentOS-Base-kunpeng.repo
[kunpeng]
name=CentOS-kunpeng - Base - mirrors.huaweicloud.com
baseurl=https://mirrors.huaweicloud.com/kunpeng/yum/el/7/aarch64/
gpgcheck=0
enabled=1

二、安装RPM包
1.清除缓存

[root@localhost ~]# yum clean all

2.创建缓存

[root@localhost ~]# yum makecache

3.安装数据库rpm包

[root@localhost ~]# yum -y install mongo-4.0.12-1.el7.aarch64

4.查看安装后的rpm包

[root@localhost ~]# rpm -qa | grep mongo
mongo-4.0.12-1.el7.aarch64

三、创建数据目录和日志文件（我这里是启用的是多实例，根据自己需求来创建）

mkdir -p /usr/local/mongodb/data/
cd /usr/local/mongodb/data/
mkdir logs db0 db1 db2
cd /usr/local/mongodb/data/logs
touch mongodb_0.log mongodb_1.log mongodb_2.log

四、创建配置文件（我这里是多实例的其一）

[root@localhost ~]# vim mongodb_0.conf 
dbpath =/usr/local/mongodb/data/db0
logpath =/usr/local/mongodb/data/logs/mongodb_0.log
logappend = true
noprealloc=true
replSet = rs0
port = 28017
fork = true
bind_ip=0.0.0.0
wiredTigerCacheSizeGB=1

五、启动mongodb

[root@localhost ~]# /usr/local/mongodb/bin/mongod -f /usr/local/mongodb/config/mongodb_0.conf
2021-07-15T00:01:12.398+0800 I CONTROL  [main] note: noprealloc may hurt performance in many applications
2021-07-15T00:01:12.398+0800 I STORAGE  [main] Max cache overflow file size custom option: 0
about to fork child process, waiting until server is ready for connections.
forked process: 9302
child process started successfully, parent exiting

六、登录数据库（我这里是指定进入某个节点，单节点不用指定端口）

[root@localhost]# /usr/local/mongodb/bin/mongo --port 28017
MongoDB shell version v4.0.12-1.el7
connecting to: mongodb://127.0.0.1:28017/?gssapiServiceName=mongodb
Implicit session: session { "id" : UUID("f1d0b6b0-b250-42dc-8945-e4bcf579659b") }
MongoDB server version: 4.0.12-1.el7
Server has startup warnings: 
2021-07-15T00:01:13.888+0800 I CONTROL  [initandlisten] 
2021-07-15T00:01:13.888+0800 I CONTROL  [initandlisten] ** WARNING: Access control is not enabled for the database.
2021-07-15T00:01:13.888+0800 I CONTROL  [initandlisten] **          Read and write access to data and configuration is unrestricted.
2021-07-15T00:01:13.888+0800 I CONTROL  [initandlisten] ** WARNING: You are running this process as the root user, which is not recommended.
2021-07-15T00:01:13.888+0800 I CONTROL  [initandlisten] 
2021-07-15T00:01:13.888+0800 I CONTROL  [initandlisten] 
2021-07-15T00:01:13.888+0800 I CONTROL  [initandlisten] ** WARNING: soft rlimits too low. The locked memory size is 65536 bytes, it should be at least 1048576 bytes
2021-07-15T00:01:14.140+0800 I REPL     [replexec-0] 
2021-07-15T00:01:14.140+0800 I REPL     [replexec-0] ** WARNING: This replica set uses arbiters, but readConcern:majority is enabled 
2021-07-15T00:01:14.140+0800 I REPL     [replexec-0] **          for this node. This is not a recommended configuration. Please see 
2021-07-15T00:01:14.140+0800 I REPL     [replexec-0] **          https://dochub.mongodb.org/core/psa-disable-rc-majority-4.0
2021-07-15T00:01:14.140+0800 I REPL     [replexec-0] 
---
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()
---

rs0:PRIMARY> 
查看当前存在的库
rs0:PRIMARY> show dbs
admin   0.000GB
config  0.000GB
local   0.006GB
退出数据库
exit

注：这样在线安装可能bin目录下缺少二进制工具文件，如mongodump mongorestore等命令

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