Share
Embed
Slide 1
Slide 1 text
Deploying Go Apps with
Google App Engine
Stephen Lewis
Code samples at
https://github.com/stephenlewis/eveningwithgo
Slide 2
Slide 2 text
What is App Engine?
● Application hosting on Google infrastructure
● Free to get started
● Supports Python (since 2008), Java (2009)
and Go (2011)
● Comes with a suite of services
(most importantly the Datastore)
● Automatically manages resources to allow
scaling according to demand
Slide 3
Slide 3 text
How to get started
1. Download SDK
2. Write a Go app with net/http handlers
3. Write an app.yaml
4. Use appcfg.py to upload your code
Slide 4
Slide 4 text
"Hello World" demo
Slide 5
Slide 5 text
Services available on App Engine
Datastore
URL Fetch
Memcache
Users
Blobstore
Capabilities
Channel
Task Queues
Mail
(A few more with Python and Java...)
Slide 6
Slide 6 text
URL Fetch demo
Slide 7
Slide 7 text
The Datastore
● A schemaless key-value store
● Emphasis on read/query performance
● Only answers queries using existing indexes
● Offers transactions (within entity groups)
● Eventually consistent queries
● Data replicated across data centres
Slide 8
Slide 8 text
Datastore demo
Slide 9
Slide 9 text
Pricing
● Compute-wise, you pay for instance hours
($0.08 per hour)
● Datastore writes ($0.10 per 100k operations)
● Datastore reads ($0.07 per 100k operations)
● Also: outgoing bandwidth, storage, outgoing
HTTP requests, emails sent, channels
opened
● Memcache is free (and use is encouraged!)
● Minimum charge: $9 per month
Slide 10
Slide 10 text
Questions?
N.B. I made a mistake in an answer to one of the
questions in the video:
the first SLA trigger is 99.95%, not 100%