Resumo das lições aprendidas na Kubecon 2017. A brief summary of the main presentations I have attended in Kubecon 2017.

1. Key take aways
”O que nós temos que aprender?”
https://goo.gl/GP9E8t

2. Agenda
1. KubeCon – sobre o evento
2. Atualização de projetos CNCF
3. Netflix Keynote – Continuous Delivery
4. HBO Kubernetes Journey
5. AWS Kubernetes Keynote
6. Nordstrom 101 Ways to Crash your Cluster
7. Cultura Open Source à Google
8. Kubernetes em 2018
9. Links

3. ”Exciting Time for Boring Infrastructure”
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2014 2015 San Francisco 2016 Seattle 2017 Austin
Crescimento do interesse em Kubernetes
Participantes

4. ”Exciting Time for Boring Infrastructure”

5. Quem é CNCF?
Kubernetes
Orchestration
Prometheus
Monitoring
OpenTracing
Dist. Tracing API
Fluentd
Logging
Linkerd
Service Mesh
gRPC
Remote Procedure
Call
CoreDNS
Service
Discovery
Containerd
Container
Runtime
CNI
Networking API
Envoy
Service Mesh
Notary
Security
TUF
Software Update

6. CLOUD NATIVE LANDSCAPE

7. Atualizações dos projetos CNCF
Michelle Noorali
Software Engineer,
Microsoft Azure
Kubernetes 1.9
Suporte pra Windows
Containers
CoreDNS substitui o
KubeDNS
Linkerd
Atualmente com 50
usuários em produção
Potencial substituto
à Conduit
Containerd 1.0.0
Prometheus 2.0
OpenTracing à Jaeger
Security à TUF
GA à produção
Melhoria na performance
Nascido no Uber

8. Netflix keynote
• Jornada para Enterprise Continuous Delivery
• Desenvolvimento interno de ferramentas à projeto open source
• Adotado pela Netflix e pelo Waze
https://www.slideshare.net/diannemarsh/kubeconcloud-native-keynote-december-2017
Multi Cloud Releases Automatizados Melhores práticas de deploy ”built in” Comunidade ativa

9. HBO – traffic pattern
Problemas
• Desperdicio:
• Nodejs + EC2 = +50% CPU não
utilizado
• Multiplicado por overscaling
• Slow to scale up/down
• Service to service à ELB everywhere

10. Why Kubernetes?
• Utilization
• Introspection
• Faster
• Deployments and Rollbacks
• Pod Autoscaling
• Safer
• Rolling Updates
• Configuration as code
• Batteries are included
• DNS, SD, kubectl

11. Step 1
• End of 2015
• 0 containerized services
• July 2017
• GoT Season 7 Premiere
• Dockerize
• Modify EC2 Deployments
• Modify CI/CD Pipelines

12. Step Next
• Run Kubernetes
• But...

13. AWS Cloud Native Keynote
Adrian Cockcroft,
VP Cloud Architecture Strategy
https://youtu.be/5U-6sxR5DaQ
Cloud Native Principles
• Pay as you go, afterwards
• Self service – no waiting
• Global distributed by default
• Cross region availability models
• High utilization – turn idle resourcess off
• Immutable code deployments

14. 101 Ways to Crash Your Cluster
Marius Grigoriu, Sr. Technology Manager, Nordstrom
Emmanuel Gomez, Principal Engineer, Nordstrom

15. Kubernetes @Nordstrom
• Microserviços
• Reviews
• Giftcard
• Purchase Orders
• Authentication
• Personalization
• And more
• Dev Tools
• Issue tracking
• Build runners
• Log aggregation
• Telemetry aggregation
• Alerting

16. Nordstrom: 101 ways to crash your cluster
• Caso 1: Os nós (workers) que paravam
• Nós que deixaram de responder 25% à 50%
• Todos os nós se recuperavam ao mesmo tempo
• 15 minutos – kubelets deixa de responder
• Caused by lack of timeout or heartbeat kubelet->apiserver
• Fixed in 1.8 (backported to 1.7.8)
• Caso 2: o dia que os robôs se viraram contra eles
• Sem aviso o cluster é encolhido para alguns poucos nós
• Nunca foi possível determinar a causa raíz pois os dados de
diagnóstico se perderam
• Caso 3: o etcd com múltiplas personalidades
• As informações deixaram de fazer sentido
• kubectl get pods.. retornava dois resultados diferentes, de forma
aleatória
• Impacto: queda completa do cluster
• Causa: problema na consistência do etcd provavelmente causado por
latência de disco em um ambiente de HA à resolvido kubernetes 1.9

17. NotReady Checklist
1. Run: kubectl describe node
2. “kubelet stopped posting node status”
3. Look for signs of high resource utilization
4. Is there a networking issue?
5. kubelets messedup?
6. apiserver messedup?
7. Oh look, everything’s OK now

18. Cultura Open Source à Google
• Sarah Novotny, Head of Open Source Strategy, Google
• ”Culture eats strategy for breakfast” Peter Druker
https://www.youtube.com/watch?v=-5R_GbGg1nI
Exclusivo INCLUSIVO
Centralizado DISTRIBUIDO
Empresa COMUNIDADE
Processo AUTOMAÇÃO
Estagnação CRESCIMENTO
Valores

19. Futuro do Kubernetes - 2018
Build faster, smarter, better – the year of service mesh
1. Make Microservices Easier
Istio, Envoy, Conduit
2. Data for Everyone Make Data Workloads Easier
TensorFlow, GPU support, Spark
3. Integrate Servless Natively
openwhisk, fission, kubeless
4. Improve App Deployment & Config
HELM 3.0, kompose
5. Extensible and Secure Workload Identity
Spiffe, kerberos, container-identity-wg
6. Policy, Multi-tenancy, integration
Open policy agent, LDAP, etc.
7. Better Containers (and VMs)
oci, containerd, kubevirt, hyperv
Clayton Coleman
Architect, Kubernetes
and OpenShift, Red Hat

20. Kubernetes = futuros empregos TI

21. Links
• Agenda e apresentações
• https://kccncna17.sched.com/
• Playlist com os vídeos das sessões
• https://goo.gl/GP9E8t