November 2021
Intermediate to advanced
410 pages
12h 1m
Chinese
Content preview from MongoDB权威指南（第3版）
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在生产环境中设置
MongoDB
｜
345
告诉服务器从配置文件中获取选项。例如，运行
mongod --config ~/.mongodb.conf
来
使用
~/.mongodb.conf
作为配置文件。
配置文件中支持的选项与命令行中接受的选项相同。然而，二者格式是不同的。从
MongoDB 2.6
开
始，
MongoDB
的配置文件使用
YAML
格式。下面是一个配置文件的
例子：
systemLog:
destination: file
path: "mongod.log"
logAppend: true
storage:
dbPath: data/db
processManagement:
fork: true
net:
port: 5586
...
这个配置文件指定的选项与之前启动时使用的常规命令行参数相同。注意，这些相同的
选项会反映在上一节提到的
startup_log
集合的文档中
。唯一的区别是，这些选项使用的是
JSON
而不是
Y
AML
。
MongoDB 4.2
添加了一些扩展指令
，以允许加载特定的配置文件选项或加载整个配置文
件。扩展指令的优点是，一些机密信息（比如密码和安全证书）不必直接存储在配置文件
中。可以使用
--configExpand
命令行选项来启用该特性，并且必须同时包含希望启用的
扩展指令。
__rest
和
__exec
是
MongoDB
扩展指令的当前实现。
__rest
扩展指令可以从
REST
端
加载某些特定的配置文件值或整个配置文件。
__exec
扩展指令可以从
shell
或终端
命令加载某些特定的配置文件值或整个配置文件。 ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.