microservices 5 things i wish i'd known - the meetup edition
TRANSCRIPT
VINCENT KOK • DEV MANAGER • ATLASSIAN • @VINCENTKOK
Microservices5 things I wish I’d known
5 T H I N G S
T H E P R O M I S E
M O R E T H I N G S
Agenda
R E A L L I F E E X A M P L E S
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You’ve got issues
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Slow down
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Lock up
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Technology will age
The promise of Microservices
Small Independent lifecycle ReplaceableRight tool
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Steep journey ahead
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5 lessons learned
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http://images.clipartpanda.com/rainbow-unicorn-cute-tumblr_lj9cy4iZ821qdabzno1_r4_500.png
No silver bullet
Real life examples
Confluence
Connect
Conversion
Filestore
Identity
6+AvatarLogin
5 Things
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#1: Build a pattern
https://flic.kr/p/8ykpkW
The Twelve Factor App
XI. Logs
One codebase tracked in revision control, many deploys
V. Build, release, runStrictly separate build and run stages
I. Codebase
Treat logs as event streams
Anatomy of a service
Health check
200!200
/healthcheck
{ "avatar": { "details": {}, "isHealthy": true, "metadata": { "hash": "379965ce", "name": "Avatar service", "version": "2.0.8" } }}
/healthcheck/details{ "avatar": { "details": { "avatarRepository": { "isHealthy": true }, "crowd": { "isHealthy": true }, "deadlock": { "isHealthy": true
1 Build1 Repository
For every service
From slow
MTTR
To fast and reliable
A slightly better MTTR
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#2: Prevent different lifecycles
Layered layout
Common configuration per environment
Per serviceCommon configuration per service
Per environment
Simple formatinclude "common.prod.conf"include "service.conf"
http { port = 8080 interface = "127.0.0.1"}
recaptcha.key.site = "....."recaptcha.enable = true
static.asset.base = "...."
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No secrets
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#3: Deploying should dead simple
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DeployBuild and testCommit to master
Deployment pipeline
Release
Environments
Development Staging Production Disaster Recovery
Build and upload
Deployment projects take
care of the actual deployment
Create release from build
Build release information
Declarative deploymentname: My Serviceorganization: "My:Org"description: Yet Another Microservicelinks: binary: type: maven artifactId: saml version: 0.0.1 classifier: assembly healthcheck: uri: healthcheck source: url: "https://www.bitbucket.org/myservice"externalAccess: falsenotifications: email: "[email protected]"scaling: min: 4 max: 8
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#4: Test in isolation
https://flic.kr/p/dxUhia
PDVFunctional testsUnit tests
Test strategy
Contract tests
Functional tests
Stub Service mock
Stub sample
<beans profile="it">
<bean id="myClient" class=“com.mycompany.MyStub”/> </beans>
WireMock sample{ "request": { "url": “/myresource", "method": “POST” "Accept": { "matches": “application/json” } }, "response": { "status": 204 }}
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Consumer Driven Contract Testing
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An example
Service A Service B
REST
Consumer Provider
Consumer side
HTTP request
HTTP response
Client Service Mock PACT
Consumer expectation
uponReceiving("A request by user id for a user") .matching(path = "/Users/1") .willRespondWith(body = userByIdResponse) .during { providerConfig => Client(providerConfig.url).get("/Users/1)
must beEqualTo(200, Some(userByIdResponse)) }
Provider side
HTTP request
HTTP responsePACT PACT runner Provider
PACT Matrix
Consumer master Consumer prod
Provider master Latest compatibleProvider
Compatible
Provider prod Consumer Compatible Already tested
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Post Deployment Verification
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PDV
Development Staging Production Disaster Recovery
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#5: Maximum visibility
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100 kg
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99% of water
dehydrate to 98%
How much do they weigh now?
50 kg
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What is the uptime of service that depends on 30 services
with an uptime of 99.99?
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99.99 = 99.7%30
4m23 to
> 2h
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Know your system!
https://flic.kr/p/9b24xc
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Who thinks this is cool?
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Trace your requests
X-B3-TraceId : 1X-B3-SpanId : 1
X-B3-TraceId : 1X-B3-SpanId : 2X-B3-ParentSpanId : 1
X-B3-TraceId : 1X-B3-SpanId : 3X-B3-ParentSpanId : 2
X-B3-TraceId : 1X-B3-SpanId : 4X-B3-ParentSpanId : 3
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More things
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Technology stack Deployment platform
Yield and Harvest
Circuit brakers
Design for failure
Service Discovery
Team composition There is even more…
Thank you!
VINCENT KOK • DEV MANAGER • ATLASSIAN • @VINCENTKOK