Download - Ops Skills and Tools for Beginners [#MongoDB World 2014]

rainforest @rainforestqa

Ops Skills and Tools for Beginners

Russell Smith!

English guy Mongo DB Master Ex Ops consultant

Ruby / PHP developer YC S12 Alum

Using mongo in Prod since 1.6/1.8

@rainforestqarainforest

Rainforest QA

!

Insanely simple testing

checkout: www.rainforestqa.com

http://www.rainforestqa.com

What is Ops?


Setting up servers / services


Supporting Engineers


Keeping stuff running


Avoiding disasters


Fixing breakage

Lets Learn the basics

Installation


Replicated


Sharded


Best practices

Ubuntu is simplest

Install from Mongo’s repo

Chose the right replica set size: 3 nodes

Never use 32 bits


Alternatives

MongoHQ

MonogLab

ObjectRocket

MMS + AWS (via automation)

Monitoring Mongo


Server components


Storage

magnetic, ssd

metric: disk io


Memory / RAM

fastest general store

metrics; free, swap usage


Network

allows communication

use 1gbit or higher (avoid 100mbit)

metrics; latency, throughput


CPU

more is better

mostly used

metrics; % usage


Monitoring & Diagnostics


Top things to monitorFailover events

Repl Lag

Connections

Lock %

Disk usage


Hosted is Simplest

MMSHosted, free for monitoring

!

Also can do Backups

Automation

ScoutMonitors mongo, servers and many

others (Plugins!) !

non-free

Server DensityMonitors mongo, servers and many

others (Plugins!) !

non-free


Opensource options

Ganglia

Munin

Nagios

Zabbix

Linux tools to learnmongostat / mongotop

top iostat vmstat netstat


Mongo shellrs.conf()

rs.status()

db.serverStatus()

db.stats()

db.currentOp()


Backups


Backup options

mongodump

from the file system

LVM / EBS

MMS


TEST YOUR BACKUPS

Common pitfals

Missing indexes!

Running out of disk space

Untested backups

Sharding too late / wrong key

un-replicated / even set size


Conclusion

do backups

monitor

read the docs

rainforest @rainforestqa

Questions?@rainforestqa

@rhs

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