mongoDB 启动与停止

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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 mongodtcp        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.confport = 27000dbpath = /data/mongodata/rs2logpath = /data/mongodata/rs2/rs2.logsmallfiles = truefork = truepidfilepath = /var/run/mongo.pid# mongod --config /var/lib/mongodb/conf/rs2.conf &### Author : Leshami### Blog   : http://blog.csdn.net/leshami# netstat -nltp|grep 27000tcp        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 mongodtcp        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/mongod4、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=$MONGODB_HOME/bin/mongod#mongodb config fileMONGODB_CONF=$MONGODB_HOME/conf/mongodb.conf#mongodb PIDMONGODB_PID=/var/run/mongo.pid#set open file limitSYSTEM_MAXFD=65535MONGODB_NAME="mongodb". /etc/rc.d/init.d/functionsif [ ! -f $MONGODB_BIN ]then        echo "$MONGODB_NAME startup: $MONGODB_BIN not exists! "          exitfistart(){     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 startabout to fork child process, waiting until server is ready for connections.forked process: 5543child process started successfully, parent exitingStarting mongodb:                                          [  OK  ]

三、停止mongoDB

1、向mongod进程发送信号###SIGINT信号# ps -ef|grep mongod|grep rs1root       5435   4914  1 19:13 pts/2    00:00:14 mongod --dbpath=/data/mongodata/rs1 --logpath=/data/mongodata/rs1/rs1.log# kill -2 54352016-08-30T17:02:00.528+0800 I CONTROL[signalProcessingThread] got signal 2(Interrupt), will terminate after current cmd ends2016-08-30T17:02:00.530+0800 I REPL     [signalProcessingThread] Stopping replication applier threads2016-08-30T17:02:00.554+0800 I STORAGE  [conn1253] got request after shutdown()2016-08-30T17:02:00.774+0800 I CONTROL  [signalProcessingThread] now exiting2016-08-30T17:02:00.774+0800 I NETWORK  [signalProcessingThread] shutdown: going to close listening sockets...2016-08-30T17:02:00.774+0800 I NETWORK  [signalProcessingThread] closing listening socket: 62016-08-30T17:02:00.775+0800 I NETWORK  [signalProcessingThread] closing listening socket: 72016-08-30T17:02:00.775+0800 I NETWORK  [signalProcessingThread] removing socket file: /tmp/mongodb-27017.sock2016-08-30T17:02:00.775+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] removeJournalFiles2016-08-30T17:02:00.777+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 stopped2016-08-30T17:02:00.882+0800 I JOURNAL  [durability] Durability thread stopped2016-08-30T17:02:00.882+0800 I STORAGE  [signalProcessingThread] shutdown: closing all files...2016-08-30T17:02:00.884+0800 I STORAGE  [signalProcessingThread] closeAllFiles() finished2016-08-30T17:02:00.884+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 rs3root  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  --shutdown5、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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