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目录

环境：

系统：CentOS7.9    

# 1. 关闭selinux、firewall

sed -i s/SELINUX=enforcing/SELINUX=disabled/g /etc/selinux/configsetenforce 0systemctl disable firewalld.servicesystemctl stop firewalld.servicesystemctl status firewalld.service

# 2. 系统打开文件数

#系统打开文件数【单独下边两步需要重启才生效】grep -w "^* soft nofile.*" /etc/security/limits.conf || echo "* soft nofile 61440" >> /etc/security/limits.confgrep -w "^* hard nofile.*" /etc/security/limits.conf || echo "* hard nofile 61440" >> /etc/security/limits.confgrep -w "^DefaultLimitNOFILE.*" /etc/systemd/system.conf || echo "DefaultLimitNOFILE=61440" >> /etc/systemd/system.confgrep -w "^DefaultLimitNPROC.*" /etc/systemd/system.conf || echo "DefaultLimitNPROC=61440" >> /etc/systemd/system.conf#【不重启生效】ulimit -Hn 61440    # 【改大后，不可改小，直到重启恢复默认】ulimit -Sn 61440

# 3. ntp时间同步

# 关闭chronyd时间服务systemctl stop chronyd.servicesystemctl disable chronyd.service# 调整系统时区为亚洲上海【shanghai】timedatectl set-timezone Asia/Shanghai# 安装ntp服务, 并调整本地时间yum -y install ntpsed -i s/centos.pool.ntp.org/cn.pool.ntp.org/g /etc/ntp.confntpdate -u 0.cn.pool.ntp.orgsystemctl enable ntpd.servicesystemctl restart ntpd.servicentpdate -u 0.cn.pool.ntp.org

# 4. 挂数据盘、添加软件源、安装，并配置

#     1> 挂数据盘

# 确认vdb没用的话，可以使用# pvcreate -y /dev/vdbpvcreate /dev/vdbvgcreate vg_cunchu /dev/vdblvcreate -L 99.6G vg_cunchu -n lv_cunchumkfs.xfs /dev/vg_cunchu/lv_cunchu# 创建挂载目录mkdir -p /data/mongodb# 写入开机挂载vim /etc/fstab# 执行一次即可，这里没写判断# echo -e "/dev/vg_cunchu/lv_cunchu\t/data/mongodb/\txfs\tdefaults\t0 0" >> /etc/fstab # 挂载mount -a# 创建需要的数据目录mkdir -p /data/mongodb/confmkdir -p /data/mongodb/data/configmkdir -p /data/mongodb/data/shard{1..3}mkdir -p /data/mongodb/logmkdir -p /data/mongodb/key

#     2> 添加软件源、安装

cat > /etc/yum.repos.d/mongodb.repo << "EOF"[mongodb-org]name=MongoDB Repositorybaseurl=https://mirrors.tuna.tsinghua.edu.cn/mongodb/yum/el$releasever/gpgcheck=0enabled=1EOF

yum install -y mongodb-orgsystemctl disable mongod

#     3> 添加配置文件

cat > /data/mongodb/conf/config.conf << EOFdbpath=/data/mongodb/data/configlogpath=/data/mongodb/log/config.logport=27018logappend=truefork=truemaxConns=5000replSet=configsconfigsvr=truebind_ip=0.0.0.0EOFcat > /data/mongodb/conf/mongos.conf << EOFlogpath=/data/mongodb/log/mongos.loglogappend = trueport = 27017fork = trueconfigdb = configs/192.168.100.21:27018,192.168.100.22:27018,192.168.100.23:27018maxConns=20000bind_ip=0.0.0.0EOFcat > /data/mongodb/conf/shard1.conf << EOFdbpath=/data/mongodb/data/shard1logpath=/data/mongodb/log/shard1.logport=27001logappend=truefork=truemaxConns=5000shardsvr=truereplSet=shard1bind_ip=0.0.0.0EOFcat > /data/mongodb/conf/shard2.conf << EOFdbpath=/data/mongodb/data/shard2logpath=/data/mongodb/log/shard2.logport=27002logappend=truefork=truemaxConns=5000shardsvr=truereplSet=shard2bind_ip=0.0.0.0EOFcat > /data/mongodb/conf/shard3.conf << EOFdbpath=/data/mongodb/data/shard3logpath=/data/mongodb/log/shard3.logport=27003logappend=truefork=truemaxConns=5000shardsvr=truereplSet=shard3bind_ip=0.0.0.0EOF

#    4> 添加启动脚本

cat > /etc/init.d/mongodb-cluster << EOF#!/bin/bash## description: mongodb cluster daemon# chkconfig: 2345 63 63#starting(){    # 启动配置服务    mongod -f /data/mongodb/conf/config.conf > /dev/null 2>&1 &    # 启动shard{1..3}    mongod -f /data/mongodb/conf/shard1.conf > /dev/null 2>&1 &    mongod -f /data/mongodb/conf/shard2.conf > /dev/null 2>&1 &    mongod -f /data/mongodb/conf/shard3.conf > /dev/null 2>&1 &    # 启动mongos    mongos -f /data/mongodb/conf/mongos.conf > /dev/null 2>&1 &    sleep 8    running_num=\`ps -aux | grep -v grep | grep '/data/mongodb' | egrep -c 'mongod|mongos'\`    if [ \$running_num -eq 5 ]; then    echo -e "MongoDB Cluster Node ... ... [ \e[1;32mSTART\e[0m ]"    else    echo -e "MongoDB Cluster Node ... ... [ \e[1;31mFaill\e[0m ]"    fi}stoping(){    # 停止5个服务    ps -aux | grep -v grep | grep "/data/mongodb" | egrep "mongod|mongos" | awk '{print $2}' | xargs kill -9 > /dev/null 2>&1 &    sleep 2    running_num=\`ps -aux | grep -v grep | grep '/data/mongodb' | egrep -c 'mongod|mongos'\`    if [ \$running_num -eq 0 ]; then    echo -e "MongoDB Cluster Node ... ... [ \e[1;32mSTOP\e[0m ]"    else    echo -e "MongoDB Cluster Node ... ... [ \e[1;31mdeaded\e[0m ]"    fi}statusing(){    running_num=\`ps -aux | grep -v grep | grep '/data/mongodb' | egrep -c 'mongod|mongos'\`    if [ \$running_num -eq 5 ]; then    echo -e "MongoDB Cluster Node ... ... [ \e[1;32mrunning\e[0m ]"    else    echo -e "MongoDB Cluster Node ... ... [ \e[1;31mis not running\e[0m ]"    fi}case "\$1" in    start)        starting;;    stop)        stoping;;    restart)        \$0 stop        \$0 start;;    status)        statusing;;    *)        echo "usage: \$0 { start | stop | restart | status }"        exit 1esacexit 0EOF# 添加执行权限chmod +x /etc/init.d/mongodb-cluster

#     5> 启动服务【所有节点执行】

chkconfig --add mongodb-cluster/etc/init.d/mongodb-cluster start

#     6> 配置集群

# 其中一台执行mongo --host 192.168.100.21 --port 27018use adminrs.initiate({_id:"configs",members:[{_id:0,host:"192.168.100.21:27018"},{_id:1,host:"192.168.100.22:27018"}, {_id:2,host:"192.168.100.23:27018"}]})rs.status()

# 其中一台执行，这里指定了192.168.100.23为仲裁节点[arbiter]；# 在仲裁节点不可以执行如下命令mongo --host 192.168.100.21 --port 27001use adminrs.initiate({_id:"shard1",members:[{_id:0,host:"192.168.100.21:27001"},{_id:1,host:"192.168.100.22:27001"},{_id:2,host:"192.168.100.23:27001",arbiterOnly: true}]})

# 其中一台执行，这里指定了192.168.100.23为仲裁节点[arbiter]；# 在仲裁节点不可以执行如下命令mongo --host 192.168.100.21 --port 27002use adminrs.initiate({_id:"shard2",members:[{_id:0,host:"192.168.100.21:27002"},{_id:1,host:"192.168.100.22:27002"},{_id:2,host:"192.168.100.23:27002",arbiterOnly: true}]})

# 其中一台执行，这里指定了192.168.100.23为仲裁节点[arbiter]；# 在仲裁节点不可以执行如下命令mongo --host 192.168.100.21 --port 27003use adminrs.initiate({_id:"shard3",members:[{_id:0,host:"192.168.100.21:27003"},{_id:1,host:"192.168.100.22:27003"},{_id:2,host:"192.168.100.23:27003",arbiterOnly: true}]})

# 其中一台执行mongo --host 192.168.100.21 --port 27017use adminsh.addShard("shard1/192.168.100.21:27001,192.168.100.22:27001,192.168.100.23:27001")sh.addShard("shard2/192.168.100.21:27002,192.168.100.22:27002,192.168.100.23:27002")sh.addShard("shard3/192.168.100.21:27003,192.168.100.22:27003,192.168.100.23:27003")sh.status()

# 5. 实际使用

#     1>. 实现分片功能

# 设置分片chunk大小# 设置块大小为1M是方便实验，不然需要插入海量数据mongo --host 192.168.100.21 --port 27017use configdb.setting.save({"_id":"chunksize","value":1})

#          1>> 数据库启用分片

sh.enableSharding("calon")

#          2>> 创建索引，对表进行分片

db.user.createIndex({"id":1})                # 以"id"作为索引sh.shardCollection("calon.user",{"id":1})    # 根据"id"对user表进行分片sh.status()    # 查看分片情况

#          3>> 模拟写入数据

use calonfor(i=1;i<=500;i++){db.user.insert({"id":i,"name":"jack"+i})} #模拟往calon数据库的user表写入500数据

#     2> 启用密码认证

# 其中一个节点执行即可openssl rand -base64 123 > /data/mongodb/key/access.keychmod 400 /data/mongodb/key/access.keyrsync -av /data/mongodb/key/access.key 192.168.100.22:/data/mongodb/key/rsync -av /data/mongodb/key/access.key 192.168.100.23:/data/mongodb/key/mongo# 创建管理员用户,这里密码为“admin-123”use admindb.createUser({user: "root",pwd: "admin-123", roles: [ { role: "root", db: "admin" } ]})# 创建普通用户use calon  db.createUser({user: "user",pwd: "admin-456",roles: [ { role: "dbOwner", db: "calon" } ]})# /data/mongodb/conf/mongos.conf 文件添加如下，下面放了脚本，不用手敲# keyFile=/data/mongodb/key/access.key# 其他配置文件添加# auth=true# keyFile=/data/mongodb/key/access.key# 依次重启节点mongodb-cluster

#     自动追加【密码认证】配置的脚本

#!/bin/bash#for a in config.conf shard1.conf shard2.conf shard3.confdo        grep "auth=true" /data/mongodb/conf/${a} || echo "auth=true" >> /data/mongodb/conf/${a}donefor b in config.conf shard1.conf shard2.conf shard3.conf mongos.confdo        grep "keyFile=/data/mongodb/key/access.key" /data/mongodb/conf/${b} || echo "keyFile=/data/mongodb/key/access.key" >> /data/mongodb/conf/${b}done