mongoDB 启动与停止

Leshami

发布于 2018-08-13 11:56:18

2.9K0

发布于 2018-08-13 11:56:18

MongoDB是一个基于分布式文件存储的数据库。由C++语言编写。旨在为WEB应用提供可扩展的高性能数据存储解决方案。它以高性能、易部署、易使用，存储数据非常方便等优点被广泛使用。其安装配置相当简单，有如轻量级的mysql，但功能丝毫不差。本文主要描述mongoDB的启动与停止。

一、准备环境

1、当前环境
# more /etc/redhat-release 
CentOS release 6.7 (Final)

2、安装mongod
# which mongod
/var/lib/mongodb/bin/mongod

参考： Linux下快速安装MongoDB Windows平台下安装MongoDB

3、创建数据目录
# mkdir -pv /data/mongodata/{rs1,rs2,rs3}
# mkdir -pv /var/lib/mongodb/conf

二、启动mongodb

1、基于命令行方式启动mongodb
# mongod --dbpath=/data/mongodata/rs1 --logpath=/data/mongodata/rs1/rs1.log &

缺省端口为
[root@node3 rs1]# netstat -nltp|grep mongod
tcp        0      0 0.0.0.0:27017               0.0.0.0:*                   LISTEN      5062/mongod 

2、基于配置文件的命令行启动
vi /var/lib/mongodb/conf/rs2.conf

port = 27000
dbpath = /data/mongodata/rs2
logpath = /data/mongodata/rs2/rs2.log
smallfiles = true
fork = true
pidfilepath = /var/run/mongo.pid

# mongod --config /var/lib/mongodb/conf/rs2.conf &

### Author : Leshami
### Blog   : http://blog.csdn.net/leshami

# netstat -nltp|grep 27000
tcp        0      0 0.0.0.0:27000               0.0.0.0:*                   LISTEN      5356/mongod    

3、以守护进程方式启动mongodb
# mongod --dbpath=/data/mongodata/rs3 --logpath=/data/mongodata/rs1/rs3.log --fork --port 28000

# netstat -nltp|grep mongod
tcp        0      0 0.0.0.0:28000               0.0.0.0:*                   LISTEN      5465/mongod         
tcp        0      0 0.0.0.0:27017               0.0.0.0:*                   LISTEN      5435/mongod         
tcp        0      0 0.0.0.0:27000               0.0.0.0:*                   LISTEN      5448/mongod

4、使用系统服务的方式启动mogodb
启动脚本

# vi /etc/init.d/mongod

#!/bin/sh  
# chkconfig: 2345 93 18  

#MogoDB home directory  
MONGODB_HOME=/var/lib/mongodb

#mongodb command  
MONGODB_BIN=$MONGODB_HOME/bin/mongod

#mongodb config file
MONGODB_CONF=$MONGODB_HOME/conf/mongodb.conf

#mongodb PID
MONGODB_PID=/var/run/mongo.pid

#set open file limit
SYSTEM_MAXFD=65535

MONGODB_NAME="mongodb"
. /etc/rc.d/init.d/functions

if [ ! -f $MONGODB_BIN ]
then
        echo "$MONGODB_NAME startup: $MONGODB_BIN not exists! "  
        exit
fi

start(){
     ulimit -HSn $SYSTEM_MAXFD
     $MONGODB_BIN --config="$MONGODB_CONF"  --fork ##added @20160901
     ret=$?
     if [ $ret -eq 0 ]; then
        action $"Starting $MONGODB_NAME: " /bin/true
     else
        action $"Starting $MONGODB_NAME: " /bin/false
     fi

}

stop(){
        PID=$(ps aux |grep "$MONGODB_NAME" |grep "$MONGODB_CONF" |grep -v grep |wc -l) 
        if [[ $PID -eq 0  ]];then
        action $"Stopping $MONGODB_NAME: " /bin/false
        exit
        fi
        kill -HUP `cat $MONGODB_PID`
        ret=$?
        if [ $ret -eq 0 ]; then
                action $"Stopping $MONGODB_NAME: " /bin/true
                rm -f $MONGODB_PID
        else   
                action $"Stopping $MONGODB_NAME: " /bin/false
        fi

}

restart() {

        stop
        sleep 2
        start
}

case "$1" in
        start)
                start
                ;;
        stop)
                stop
                ;;
        status)
        status $prog
                ;;
        restart)
                restart
                ;;
        *)
                echo $"Usage: $0 {start|stop|status|restart}"
esac

# chmod u+x /etc/init.d/mongod

# service mongod start
about to fork child process, waiting until server is ready for connections.
forked process: 5543
child process started successfully, parent exiting
Starting mongodb:                                          [  OK  ]

三、停止mongoDB

1、向mongod进程发送信号
###SIGINT信号

# ps -ef|grep mongod|grep rs1
root       5435   4914  1 19:13 pts/2    00:00:14 mongod --dbpath=/data/mongodata/rs1 --logpath=/data/mongodata/rs1/rs1.log

# kill -2 5435

2016-08-30T17:02:00.528+0800 I CONTROL[signalProcessingThread] got signal 2(Interrupt), will terminate after current cmd ends
2016-08-30T17:02:00.530+0800 I REPL     [signalProcessingThread] Stopping replication applier threads
2016-08-30T17:02:00.554+0800 I STORAGE  [conn1253] got request after shutdown()
2016-08-30T17:02:00.774+0800 I CONTROL  [signalProcessingThread] now exiting
2016-08-30T17:02:00.774+0800 I NETWORK  [signalProcessingThread] shutdown: going to close listening sockets...
2016-08-30T17:02:00.774+0800 I NETWORK  [signalProcessingThread] closing listening socket: 6
2016-08-30T17:02:00.775+0800 I NETWORK  [signalProcessingThread] closing listening socket: 7
2016-08-30T17:02:00.775+0800 I NETWORK  [signalProcessingThread] removing socket file: /tmp/mongodb-27017.sock
2016-08-30T17:02:00.775+0800 I NETWORK  [signalProcessingThread] shutdown: going to flush diaglog...
2016-08-30T17:02:00.775+0800 I NETWORK  [signalProcessingThread] shutdown: going to close sockets...
2016-08-30T17:02:00.775+0800 I STORAGE  [signalProcessingThread] shutdown: waiting for fs preallocator...
2016-08-30T17:02:00.775+0800 I STORAGE  [signalProcessingThread] shutdown: final commit...
2016-08-30T17:02:00.775+0800 I JOURNAL  [signalProcessingThread] journalCleanup...
2016-08-30T17:02:00.775+0800 I JOURNAL  [signalProcessingThread] removeJournalFiles
2016-08-30T17:02:00.777+0800 I NETWORK  [conn1254] end connection 192.168.1.247:58349 (0 connections now open)
2016-08-30T17:02:00.779+0800 I JOURNAL  [signalProcessingThread] Terminating durability thread ...
2016-08-30T17:02:00.881+0800 I JOURNAL  [journal writer] Journal writer thread stopped
2016-08-30T17:02:00.882+0800 I JOURNAL  [durability] Durability thread stopped
2016-08-30T17:02:00.882+0800 I STORAGE  [signalProcessingThread] shutdown: closing all files...
2016-08-30T17:02:00.884+0800 I STORAGE  [signalProcessingThread] closeAllFiles() finished
2016-08-30T17:02:00.884+0800 I STORAGE  [signalProcessingThread] shutdown: removing fs lock...
2016-08-30T17:02:00.885+0800 I CONTROL  [signalProcessingThread] dbexit:  rc: 0

###SIGTERM信号
# ps -ef|grep mongod|grep rs3

# ps -ef|grep mongod|grep rs3
root  5465 1 1 19:14 ? 00:00:13 mongod --dbpath=/data/mongodata/rs3 --logpath=/data/mongodata/rs1/rs3.log --fork --port 28000
# kill -4 5465

信号     产生方式 
sigint  通过ctrl+c将会对当进程发送此信号 
sigterm kill命令不加参数就是发送这个信号  

对进程的影响
  sigint 信号被当前进程树接收到，也就是说，不仅当前进程会收到信号，它的子进程也会收到
  sigterm只有当前进程收到信号，子进程不会收到。如果当前进程被kill了，那么它的子进程的父进程将会是init，也就是pid为1的进程

上述信号在发出后
        不再接受新的连接请求
        等待现有的连接处理完毕
        关闭所有打开的连接
        将内存的数据写出到磁盘
        安全停止

2、使用系统服务脚本方式停止mongod
        # ps -ef|grep mongod
        root   5675  1  3 19:33 ?   00:00:00 /var/lib/mongodb/bin/mongod --config=/var/lib/mongodb/conf/rs2.conf
        root       5689   4950  0 19:33 pts/3    00:00:00 grep mongod
        [root@node3 conf]# 
        [root@node3 conf]# service mongod stop
        Stopping mongodb:                                          [  OK  ]

3、db.shutdownServer()方式
        # mongo localhost:27000
        > use admin
        > db.shutdownServer()

4、使用命令行方式关闭(补充@20160901)
        # mongod -f /etc/mongo-m.conf  --shutdown

5、强制关闭mongod
        # kill -9 5675
        缺点：
        数据库直接关闭
        数据丢失
        数据文件容易损坏(需要进行修复)

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原始发表：2016年08月30日，如有侵权请联系 cloudcommunity@tencent.com 删除

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