Anti-fragile Cloud Architectures - JUG DA · grails full stack, web xd streams, taps, jobs boot...
Transcript of Anti-fragile Cloud Architectures - JUG DA · grails full stack, web xd streams, taps, jobs boot...
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Anti-fragile Cloud Architectures Agim Emruli - @aemruli - mimacom
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“Antifragility is beyond resilience or robustness. The resilient resists shocks and stays the same; the antifragile gets better.” Nasim Nicholas Taleb
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Fragile Robust ANTI-FragileNon-linear (Konkav)
linear Non-linear (Konvex)
Post-traumatic Syndrom
Post-traumatic Growth
Centralized Decentralized
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Fragile Robust
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Fragile Anti-Fragile
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Dem
and
Time
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Scale cube
Start
Infinite Scale
Mod
ular
ize
Duplicate
Partition
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Start
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Duplication
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Dem
and
Time
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Modularization
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Dem
and
Time
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EuropeNorth America
PArtioning
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Dem
and
Time
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{you Name it} Service
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a microservices architecture IS a service-oriented architecture composed of loosely coupled elements that have bounded contexts
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Hospital
Patient Product
DosingTherapy
product Management
Therapy Dose Calculation
Patients
Shared Kernel
Partner Conformist
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Component Component
ComponentComponent
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The network is reliable
Latency is zero
Bandwith is Infinite
The network is secure
Topology doesn’t Change
There is one Administrator
Transport cost is zero
The network is homogeneous
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The network is reliable
Latency is zero
Bandwith is Infinite
The network is secure
Topology doesn’t Change
There is one Administrator
Transport cost is zero
The network is homogeneous
http://www.rgoarchitects.com/Files/fallacies.pdf
The network Fallacies
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Timeout
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public class MessageReceiver { private Session session; private Destination destination; public void doReceive() throws Exception{ MessageConsumer consumer = session.createConsumer(destination); consumer.receive(); } }
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public class MessageReceiver { private Session session; private Destination destination; public void doReceive() throws Exception{ MessageConsumer consumer = session.createConsumer(destination); consumer.receive(20L); } }
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public class HttpReceiver { public String getResource() throws IOException { URL url = new URL("http://www.google.de"); InputStream inputStream = url.openStream(); return “…”; } }
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public class HttpReceiver { public String getResource() throws IOException { URL url = new URL("http://www.google.de"); URLConnection urlConn = url.openConnection(); urlConn.setConnectTimeout(10); urlConn.setReadTimeout(10); InputStream inputStream = url.getInputStream(); return “…”; }}
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public class DataSourceConfig { public void DataSource setupDataSource(){ BasicDataSource basicDataSource = new BasicDataSource(); basicDataSource.setMaxWait(30L); }}
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Add Latency
tcqdiscadddeveth0rootnetemcorrupt5%
tcqdiscadddeveth0rootlatencydelay1000ms500ms
Corrupt Packages
Drop Packagestcqdiscadddeveth0rootnetemloss7%25%
Block DNSiptables-AINPUT-ptcp-mtcp--dport53-jDROP
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PatternsStability Capacity Transparency
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Internet Traffic
37%
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CLOUD
SERVICE REGISTRY,CIRCUIT BREAKER, METRICS
CORE
FRAMEWORK SECURITY GROOVY REACTOR
IO E
XECU
TION
IO F
OUND
ATIO
N
GRAILS
FULL STACK, WEB
XD
STREAMS, TAPS, JOBS
BOOT
BOOTABLE, MINIMAL, OPS-READY
BATCH
JOBS, STEPS, READERS, WRITERS
DATA
RELATIONAL DATA NON-RELATIONAL DATA
BIG DATA
INGESTION, EXPORT,ORCHESTRATION, HADOOP
WEB
CONTROLLERS, REST,WEBSOCKET
INTEGRATION
CHANNELS, FILTERS,ADAPTERS, TRANSFORMERS
IO C
OORD
INAT
ION
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Application
Tomcat (Jetty, Undertow)
Actuator
Data Source
java -jar myapplication.jar
Java Runtime Environment
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Circuit Breaker
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Fragile Robust ANTI-FragileNo Timeout Timeout CIRCUIT-BREAKER
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Execute Command
Run
Fallback
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Execute Command
Run
Fallback
Circuit Open ?
Close Circuit
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Tomcat Thread Pool
Thre
ad -
1Service
Service
Service ServiceTh
read
- 2
Thre
ad -
3X
Thre
ad -
4
Thre
ad -
5
Thre
ad -
6
Thre
ad -
7
Thre
ad -
8
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COMMAND THREAD
COMMAND THREAD
COMMAND THREAD
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COMMAND THREAD
COMMAND THREADTRACE --- [http-nio-auto-1-exec-10] outside command TRACE --- [hystrix-RestCurrencyExchange-10] inside command
Thread locals
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@SpringCloudApplication public class SearchGateway { @HystrixCommand(fallbackMethod = "fallback") public List<SearchHit> search(String query) { return …; } public List<SearchHit> fallback() { return Collections.emptyList(); } }
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Service Registry
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Fragile Robust ANTI-FragilePoint-To-Point Service-Registry
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Service
Service
Service Service v1.0
Client
Service v1.1
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Eureka Consul ZookeeperAvailability Partitioning
Consistency Availability
Consistency Availability
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Avai
labi
lity
Time
Eureka
Zookeeper
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EuropeNorth America
Eureka Eureka
PArtioning
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Discovery
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Client Discovery
Client
Service Registry
Service InstanceService InstanceService Instance
Execution Environment
DNS
Consul
KubernetesLoad Balance
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Client Discovery
Client
Service Registry
Service InstanceService InstanceService Instance
Execution Environment
Api
Load Balance
Discovery Client
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Server Discovery
Client
Service Registry
Service InstanceService InstanceService Instance
Execution Environment
Proxy
Load Balance
Sidecar
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Server Discovery
Client
Execution Environment
RequestZUUL Edge Gateway
Service Registry
Service InstanceService InstanceService InstanceLoad
Balance
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Client
Service Service
Round Robin
Client
Service Service
Availability Filtering
XClient
Service 2.3
Service 0.7
Weighted Response Time
Load Balancing
LINEAR NON-LInear NON-LInear
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Add Latency
tcqdiscadddeveth0rootnetemcorrupt5%
tcqdiscadddeveth0rootlatencydelay1000ms500ms
Corrupt Packages
Drop Packagestcqdiscadddeveth0rootnetemloss7%25%
Block DNSiptables-AINPUT-ptcp-mtcp--dport53-jDROP
whiletrue;
doddif=/dev/urandomof=/burnbs=1Mcount=1024iflag=fullblockdone
Simulate heavy IO
whiletrue;doopensslspeed;done
Burn CPU
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API Gateway
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Client
Resource
Resource
Resource
Resource
API G
atew
ay
Client
Client
Client
Client
Clie
nt
(C OR R1 OR R2 OR R3 OR R4) (C OR A) AND (R1 OR R2 OR R3 OR R4)
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Running Distributed Architectures
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Load Performance Stress
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RobustAt 12:24 PM Pacific Time on December 24 network traffic stopped on a few ELBs….. At around 3:30 PM on December 24, network traffic stopped on additional ELBs …..Netflix is designed to handle failure of all or part of a single availability zone in a region as we run across three zones and operate with no loss of functionality on two. We are working on ways of extending our resiliency to handle partial or complete regional outages.
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Hormesis
Impa
ct
Time
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On Sunday, at 2:19am PDT, there was a brief network disruption that impacted…….. So, when the network disruption occurred on Sunday morning, and a number of storage servers simultaneously requested their membership data,….. By 2:37am PDT, the error rate in customer requests to DynamoDB had risen far beyond any level experienced in the last 3 years…… After several failed attempts at adding capacity, at 5:06am PDT, we decided to pause requests to the metadata service.
Anti-fragile
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Despite being run entirely from AWS' cloud platform the online streaming giant Netflix reports a quick recovery from Sunday's disruption - demonstrating the importance of its approach of building cloud-based systems to "fail".
Anti-fragile
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AWS:REBOOT 2700+ NodesCassandra
218 Rebooted 22 Dead
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Thanks Agim Emruli - mimacom @aemruli