mongodb 3.4 学习 (一) 安装

https://www.mongodb.com/blog/post/capacity-planning-and-hardware-provisioning-mongodb-ten-minutes

安装

yum -y install mongodb-org*

systemctl enable mongod && systemctl restart mongod

mongo命令行客户端登录有警告，用以下方法消除

#1. 数据目录需要用xfs

 ** WARNING: Using the XFS filesystem is strongly recommended with the WiredTiger storage engine

 **          See http://dochub.mongodb.org/core/prodnotes-filesystem

opt分区格式化为xfs，将数据目录/var/lib/mongo迁移到/opt，并建立软链接

cd /var/lib && mv mongo /opt && ln -s /opt/mongo mongo

#2. mongodb默认是无密码登录，有风险

 ** WARNING: Access control is not enabled for the database.

 **          Read and write access to data and configuration is unrestricted.

建立管理员admin，对所有数据库有userAdmin权限

db.createUser({user: 'admin', pwd: '@admin', roles: [{role: 'userAdminAnyDatabase', db: 'admin'}]})

建立用户test，仅对test数据库有读写权限

use test

db.createUser({user: 'test', pwd: '@test', roles: [{role: 'readWrite', db: 'test'}]})

重新启动mongo服务，启动权限认证功能

echo -e "\nsecurity:\n  authorization: enabled" >> /etc/mongod.conf

systemctl restart mongod

用户认证

db.auth('admin', '@admin')

#3. linux的cpu各核内存共享的机制，在bios或者内核禁用

 ** WARNING: You are running on a NUMA machine.

 **          We suggest launching mongod like this to avoid performance problems:

 **              numactl --interleave=all mongod [other options]

vim /etc/default/grub

GRUB_CMDLINE_LINUX="crashkernel=auto rhgb quiet numa=off"

grub2-mkconfig -o /boot/grub2/grub.cfg

#4. transparent_hugepage机制，在内核中禁用

 ** WARNING: /sys/kernel/mm/transparent_hugepage/enabled is 'always'.

 **        We suggest setting it to 'never'

 ** WARNING: /sys/kernel/mm/transparent_hugepage/defrag is 'always'.

 **        We suggest setting it to 'never'

cat > /lib/systemd/system/disable_transparent_hugepage.service << EOF

[Unit]

Description="Disable Transparent Hugepage before MongoDB boots"

Before=mongodb.service 

[Service]

Type=oneshot

ExecStart=/bin/bash -c 'echo never > /sys/kernel/mm/transparent_hugepage/enabled'

ExecStart=/bin/bash -c 'echo never > /sys/kernel/mm/transparent_hugepage/defrag'

[Install]

RequiredBy=mongod.service

EOF

systemctl enable disable_transparent_hugepage && systemctl start disable_transparent_hugepage

systemctl restart mongod

巴特西

mongodb 3.4 学习 (一) 安装

安装

mongo命令行客户端登录有警告，用以下方法消除

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