MongoDB：单机部署

一、关闭大页内存

---

root 用户下，在 /etc/rc.local 追加如下代码（CentOS）

if test -f /sys/kernel/mm/transparent_hugepage/enabled; then
  echo never > /sys/kernel/mm/transparent_hugepage/enabled
fi
if test -f /sys/kernel/mm/transparent_hugepage/defrag; then
   echo never > /sys/kernel/mm/transparent_hugepage/defrag
fi

echo never > /sys/kernel/mm/transparent_hugepage/enabled		
echo never > /sys/kernel/mm/transparent_hugepage/defrag	

其他系统关闭参照官方文档：
https://docs.mongodb.com/manual/tutorial/transparent-huge-pages/

二、创建所需用户和组

useradd mongod
passwd mongod

三、创建mongodb所需目录结构

mkdir -p /mongodb/conf
mkdir -p /mongodb/log
mkdir -p /mongodb/data

四、解压软件包

tar xf mongodb-linux-x86_64-rhel70-3.4.16.tgz 
cp -r mongodb-linux-x86_64-rhel70-3.4.16/bin /mongodb/

五、配置文件准备

cat > /mongodb/conf/mongo.conf <<EOF
systemLog:
   destination: file
   path: "/mongodb/log/mongodb.log"
   logAppend: true
storage:
   journal:
      enabled: true
   dbPath: "/mongodb/data/"
processManagement:
   fork: true
net:
   port: 27017
   bindIp: 10.0.0.51,127.0.0.1
EOF   

# 授权
chown -R mongod.mongod /mongodb

六、启动和关闭MongoDB

su - mongod 
echo 'export PATH=/mongodb/bin:$PATH' >> .bash_profile
source .bash_profile

# 启动
mongod -f /mongodb/conf/mongo.conf   
# 关闭
mongod -f /mongodb/conf/mongo.conf --shutdown

七、使用systemd管理

su - root 
cat > /etc/systemd/system/mongod.service <<EOF
[Unit]
Description=mongodb 
After=network.target remote-fs.target nss-lookup.target
[Service]
User=mongod
Type=forking
ExecStart=/mongodb/bin/mongod --config /mongodb/conf/mongo.conf
ExecReload=/bin/kill -s HUP $MAINPID
ExecStop=/mongodb/bin/mongod --config /mongodb/conf/mongo.conf --shutdown
PrivateTmp=true  
[Install]
WantedBy=multi-user.target
EOF
[root@db01 ~]# systemctl start|stop|restart  mongod