Linux中mongodb安装和导出为json

采用官方工具导出mongo数据为json格式

文档：https://docs.mongodb.com/manual/reference/program/mongoexport/

可以远程导出，只要有host:port即可。

首先需要安装tools:

在redhat中：

文档：https://docs.mongodb.com/manual/tutorial/install-mongodb-on-red-hat/

1、编写repo文件

Create a /etc/yum.repos.d/mongodb-org-3.2.repo file so that you can install MongoDB directly, using yum.

[mongodb-org-3.2]
name=MongoDB Repository
baseurl=https://repo.mongodb.org/yum/redhat/$releasever/mongodb-org/3.2/x86_64/
gpgcheck=1
enabled=1
gpgkey=https://www.mongodb.org/static/pgp/server-3.2.asc

2.选择安装功能

一共有以下几种选择

mongodb-org	A metapackage that will automatically install the four component packages listed below.
mongodb-org-server	Contains the mongod daemon and associated configuration and init scripts.
mongodb-org-mongos	Contains the mongos daemon.
mongodb-org-shell	Contains the mongo shell.
mongodb-org-tools	Contains the following MongoDB tools: mongoimport bsondump, mongodump,mongoexport, mongofiles, mongooplog, mongoperf, mongorestore, mongostat, and mongotop.

如果全部安装：

sudo yum install -y mongodb-org

如果只安装tools

sudo yum install -y mongodb-org-tools

3.导出json

sudo mongoexport -h $mongoDBUri --db $db_name  -c $collection_name  -q '{
    $or:[
        {"alerts.FamilyFriendly.completed":false},
        {"alerts.GasAndSafety.completed":false},
        {"alerts.Breakfast.completed":false},
        {"alerts.SpokenLanguage.completed":false},
        {"alerts.LocationHighlights.completed":false},
        {"alerts.AccessibilityEnsure.completed":false},
        {"alerts.AirportShuttle.completed":false},
        {"alerts.RoomSize.completed":false},
        {"alerts.Renovations.completed":false}
    ]
}' -f hotelId,alerts   -o $OUTPUTDIR/contentScore-$(date +%F)-e.json --jsonArray

-h host:port
--db db
-c collections
-q query string,查询语法
-f 选择导出字段
-o 导出文件
--jsonArray 导出为数组，默认为{}{}{}...