mongodb副本集群搭建

一.环境介绍

1.机器信息

10.40.6.68

10.40.6.108

10.40.6.110

软件环境为centos 6.x

2.mongodb 下载链接地址

https://www.mongodb.org/dl/linux/x86_64-rhel62?_ga=2.137326704.1914689897.1499321739-372422474.1499321739

使用二进制文件包安装，版本选择的是mongodb 3.2.15

二.完整步骤

1.下载安装包解压

tar -zxf mongodb-linux-x86_64-rhel62-3.2..tgz -C /usr/local/
mv /usr/local/mongodb-linux-x86_64-rhel62-3.2./ /usr/local/mongodb-3.2
ln -s /usr/local/mongodb-3.2/bin/*  /usr/local/bin/

2.创建用户和相关的文件夹

useradd mongodb
mkdir -p /data/mongodb/data/
mkdir -p /data/mongodb/log/
 
chown -R mongodb:mongodb /data/mongodb/

3.编辑配置文件，mongo的启动可以直接用命令行启动，或者指定配置文件启动

vim /etc/mongodb.conf

systemLog:
    destination: file
    path: "/data/mongodb/log/mongod.log"
    logAppend: true
storage:
    dbPath: "/data/mongodb/data/"
    directoryPerDB: true
    journal:
        enabled: true
processManagement:
    fork: true
#security:
#    authorization: "enabled"
net:
    port: 27017
replication:
    oplogSizeMB: 50
    replSetName: "repl_test"
    secondaryIndexPrefetch: "all"

至此，mongo的安装基本完成了。启动mongdb

mongodb -f /etc/mongodb.conf &

常见的3个warning 问题

WARNING: You are running this process as the root user, which is not recommended.
要用mongodb用户启动
su mongodb
mongod -f /etc/mongodb.conf &

WARNING: /sys/kernel/mm/transparent_hugepage/enabled is 'always'
禁用大的内存页
echo never >>  /sys/kernel/mm/transparent_hugepage/enabled
echo never >>  /sys/kernel/mm/transparent_hugepage/defrag

WARNING: You are running on a NUMA machine.
numactl --interleave=all mongod -f /etc/mongodb.conf &

4.初始化集群

config = { _id:"repl_test", members:[{_id:0,host:"10.40.6.68:27017"},{_id:1,host:"10.40.6.108:27017"},{_id:2,host:"10.40.6.110:27017"}]}

rs.initiate(config);

5.查看集群状态

rs.status();
db.testdb.insert({"test1":"testval1"})
db.getMongo().setSlaveOk();

参考链接地址：http://www.lanceyan.com/tech/mongodb/mongodb_repset1.html

http://www.cnblogs.com/zhoujinyi/p/3554010.html