Kubernetes: o maravilhoso mundo dos orquestradores de containers! (DevFest BH 2018)

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Kubernetes: o maravilhoso mundo dos orquestradores de containers! DEVFEST BH 2018 Alexandre Cisneiros Software Engineer @ Nubank

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O maior banco digital do mundo fora da Ásia.

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Cartão de crédito com experiência 100% digital, sem tarifas e agências.

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Programa de recompensas totalmente diferente do existente no mercado nacional. 100% digital, simples e com pontos que não expiram.

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Nossa versão de uma conta bancária: uma maneira simples e inteligente de guardar, gerenciar o seu dinheiro, com rendimentos diários.

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Microsserviços

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8 Microsserviços são serviços extremamente especializados que permitem desacoplamento entre equipes e processos.

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9 Qual a diferença? Microsserviços Monolito

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10 Mudar um pedaço por vez Microsserviços Monolito

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11 Criar um pedaço por vez Microsserviços Monolito

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12 Dividir serviços por time Microsserviços Monolito

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13 Exemplo: fechando uma fatura Credit Card Accounts Billing Charging Surrender Notiﬁcation CLOSE-BILL BILL-CLOSED NEW-BOLETO SEND-BOLETO Kafka message Service

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Containers

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15 Containers são unidades de software padronizadas que executam isoladas do resto do ambiente, compartilhando apenas o kernel do sistema operacional.

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16 VM vs. Container Infraestrutura Infraestrutura Hypervisor Sistema operacional Sistema operacional Docker daemon SO da VM Binários/Bibliotecas Aplicação Binários/Bibliotecas Aplicação Binários/Bibliotecas Aplicação SO da VM Binários/Bibliotecas Aplicação

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17 Imagens e Containers Imagem imutável Código Instruções

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17 Imagens e Containers Imagem imutável Código Instruções Container em execução Processos Sistema de arquivos

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18 Imagens e Containers Imagem imutável Código Instruções Container em execução Processos Sistema de arquivos

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18 Imagens e Containers Imagem imutável Código Instruções Container em execução Processos Sistema de arquivos Container em execu Processos Sistema de arquiv Container em execução Processos Sistema de arquivos Container em execu Processos Sistema de arquiv Container em execução Processos Container em execu Processos

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Kubernetes

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21 Kubernetes, do grego, Timoneiro. Projeto open source que provisiona containers em nós, com base em um estado desejado. Baseado no ambiente da Google.

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www.yourdomain.com Escalabilidade automática 1 4 Recuperação em falhas 2 Abstração da infraestrutura 3 Por que Kubernetes?

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Estrutura do Kubernetes Master etcd API Scheduler Node kubelet Pod 1 Pod 2 Pod 3

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Estrutura do Kubernetes Master etcd API Scheduler Node kubelet Pod 1 Pod 2 Pod 3

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Master etcd API Scheduler Node Node Node Node kubelet Pod Pod Pod Node kubelet Pod Pod Pod Node kubelet Pod Pod Pod kube Master etcd API Scheduler Estrutura do Kubernetes Master etcd API Scheduler Node kubelet Pod 1 Pod 2 Pod 3 Master etcd API Scheduler Node kubelet Pod Pod Pod Node kubelet Pod Pod Pod kube Node kubelet Pod Pod Pod Node kubelet Pod Pod Pod Node kubelet Pod Pod Pod kube Node kubelet Pod Pod Pod Node kubelet Pod Pod Pod Node kubelet Pod Pod Pod kube

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Scheduler Node kubelet Pod Pod Pod Node kubelet Pod Pod Pod Node kubelet Pod Pod Pod Node kubelet Pod Pod Pod Node kubelet Pod Pod Pod Node kubelet Pod Pod Pod Node kubelet Pod Pod Pod Node kubelet Pod Pod Pod Scheduler Estrutura do Kubernetes Scheduler kubelet Pod 1 Pod 2 Pod 3 Scheduler kubelet Pod Pod Pod kubelet Pod Pod Pod kubelet Pod Pod Pod Node kubelet Pod Pod Pod Node kubelet Pod Pod Pod Node kubelet Pod Pod Pod Node kubelet Pod Pod Pod Node kubelet Pod Pod Pod Node kubelet Pod Pod Pod Node kubelet Pod Pod Pod Node kubelet Pod Pod Pod

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billing Pod 26 kind: Pod metadata: name: billing spec: containers: - name: billing image: nubank/billing:v1 resources: requests: cpu: 1 Pod billing

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27 kind: Pod metadata: name: billing spec: containers: - name: billing image: nubank/billing:v1 resources: requests: cpu: 1 memory: 2G - name: log-collector image: nubank/logger:v1 Pod billing Pod billing log-collector

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28 kind: Deployment metadata: name: billing spec: replicas: 2 template: containers: - name: billing image: nubank/billing:v1 resources: Deployment billing Pod billing log-collector billing Pod billing log-collector billing Deployment

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29 Juntando tudo Master etcd API Scheduler Node 1 kubelet Node 2 kubelet Node 3 kubelet Dev

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30 Criando um deployment Master etcd API Scheduler Node 1 kubelet Node 2 kubelet Node 3 kubelet Dev kind: Deployment metadata: name: billing spec: replicas: 2 template: containers: - name: billing image: nubank/billing:v1

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31 Criando um deployment Master etcd API Scheduler Node 1 kubelet Node 2 kubelet Node 3 kubelet Dev kind: Deployment metadata: name: billing spec: replicas: 2 template: containers: - name: billing image: nubank/billing:v1

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32 Criando um deployment Master etcd API Scheduler Node 1 kubelet Node 2 kubelet Node 3 kubelet Dev kind: Deployment metadata: name: billing spec: replicas: 2 template: containers: - name: billing image: nubank/billing:v1

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33 Criando um deployment Master etcd API Scheduler Node 1 kubelet Node 2 kubelet Node 3 kubelet Dev

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33 Criando um deployment Master etcd API Scheduler Node 1 kubelet Node 2 kubelet Node 3 kubelet Dev

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33 Criando um deployment Master etcd API Scheduler Node 1 kubelet Node 2 kubelet Node 3 kubelet Dev

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33 Criando um deployment Master etcd API Scheduler Node 1 kubelet Node 2 kubelet Node 3 kubelet Dev billing Pod 1 billing Pod 2

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34 Criando outro deployment Master etcd API Scheduler Node 1 kubelet Node 2 kubelet Node 3 kubelet Dev billing Pod 1 billing Pod 2 kind: Deployment metadata: name: cca spec: replicas: 4 template: containers: - name: cca image: nubank/cca:v1

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35 Criando outro deployment Master etcd API Scheduler Node 1 kubelet Node 2 kubelet Node 3 kubelet Dev billing Pod 1 billing Pod 2 kind: Deployment metadata: name: cca spec: replicas: 4 template: containers: - name: cca image: nubank/cca:v1

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36 Criando outro deployment Master etcd API Scheduler Node 1 kubelet Node 2 kubelet Node 3 kubelet Dev billing Pod 1 billing Pod 2 kind: Deployment metadata: name: cca spec: replicas: 4 template: containers: - name: cca image: nubank/cca:v1

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37 Criando outro deployment Master etcd API Scheduler Node 1 kubelet Node 2 kubelet Node 3 kubelet Dev billing Pod 1 billing Pod 2

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37 Criando outro deployment Master etcd API Scheduler Node 1 kubelet Node 2 kubelet Node 3 kubelet Dev billing Pod 1 billing Pod 2

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37 Criando outro deployment Master etcd API Scheduler Node 1 kubelet Node 2 kubelet Node 3 kubelet Dev billing Pod 1 billing Pod 2

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37 Criando outro deployment Master etcd API Scheduler Node 1 kubelet Node 2 kubelet Node 3 kubelet Dev billing Pod 1 billing Pod 2 cca Pod 1 cca Pod 2 cca Pod 3 cca Pod 4

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38 Se perder um nó? Master etcd API Scheduler Node 1 kubelet Node 3 kubelet Dev billing Pod 1 cca Pod 1 cca Pod 2 Node 2 kubelet billing Pod 2 cca Pod 3 cca Pod 4

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38 Se perder um nó? Master etcd API Scheduler Node 1 kubelet Node 3 kubelet Dev billing Pod 1 cca Pod 1 cca Pod 2 cca Pod 4

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38 Se perder um nó? Master etcd API Scheduler Node 1 kubelet Node 3 kubelet Dev billing Pod 1 cca Pod 1 cca Pod 2 cca Pod 4

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38 Se perder um nó? Master etcd API Scheduler Node 1 kubelet Node 3 kubelet Dev billing Pod 1 cca Pod 1 cca Pod 2 cca Pod 4 billing Pod 2 cca Pod 3

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39 Voltando… Master etcd API Scheduler Node 1 kubelet Node 3 kubelet Dev billing Pod 1 cca Pod 1 cca Pod 2 Node 2 kubelet billing Pod 2 cca Pod 3 cca Pod 4 cca Pod 3

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40 Criando mais um deployment Master etcd API Scheduler Node 1 kubelet Node 3 kubelet Dev billing Pod 1 cca Pod 1 cca Pod 2 Node 2 kubelet billing Pod 2 cca Pod 3 cca Pod 4 cca Pod 3 kind: Deployment metadata: name: notification spec: replicas: 4 template: containers: - name: notification image: nubank/notific:v1

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41 Criando mais um deployment Master etcd API Scheduler Node 1 kubelet Node 3 kubelet Dev billing Pod 1 cca Pod 1 cca Pod 2 Node 2 kubelet billing Pod 2 cca Pod 3 cca Pod 4 cca Pod 3 kind: Deployment metadata: name: notification spec: replicas: 4 template: containers: - name: notification image: nubank/notific:v1

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42 Master etcd API Scheduler Node 1 kubelet Node 3 kubelet Dev billing Pod 1 cca Pod 1 cca Pod 2 Node 2 kubelet billing Pod 2 cca Pod 3 cca Pod 4 cca Pod 3 kind: Deployment metadata: name: notification spec: replicas: 4 template: containers: - name: notification image: nubank/notific:v1 Criando mais um deployment

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43 Master etcd API Scheduler Node 1 kubelet Node 3 kubelet Dev billing Pod 1 cca Pod 1 cca Pod 2 Node 2 kubelet billing Pod 2 cca Pod 3 cca Pod 4 cca Pod 3 Criando mais um deployment

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43 Master etcd API Scheduler Node 1 kubelet Node 3 kubelet Dev billing Pod 1 cca Pod 1 cca Pod 2 Node 2 kubelet billing Pod 2 cca Pod 3 cca Pod 4 cca Pod 3 notification Pod 1 notification Pod 2 notification Pod 3 notification Pod 4 Criando mais um deployment

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44 Aumentando o cluster Master etcd API Scheduler Node 1 kubelet Node 3 kubelet Dev billing Pod 1 cca Pod 1 cca Pod 2 Node 2 kubelet billing Pod 2 cca Pod 3 cca Pod 4 cca Pod 3 notification Pod 1 notification Pod 2 notification Pod 3 notification Pod 4 Scaler

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45 Aumentando o cluster Master etcd API Scheduler Node 1 kubelet Node 3 kubelet Dev billing Pod 1 cca Pod 1 cca Pod 2 Node 2 kubelet billing Pod 2 cca Pod 3 cca Pod 4 cca Pod 3 notification Pod 1 notification Pod 2 notification Pod 3 notification Pod 4 Scaler Node 4 kubelet

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Node 4 kubelet 46 Master etcd API Scheduler Node 1 kubelet Node 3 kubelet Dev billing Pod 1 cca Pod 1 cca Pod 2 Node 2 kubelet billing Pod 2 cca Pod 3 cca Pod 4 cca Pod 3 notification Pod 1 notification Pod 2 notification Pod 3 notification Pod 4 Scaler Aumentando o cluster

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Node 4 kubelet 47 Modificando um deployment Master etcd API Scheduler Node 1 kubelet Node 3 kubelet Dev billing Pod 1 cca Pod 1 cca Pod 2 Node 2 kubelet billing Pod 2 cca Pod 3 cca Pod 4 cca Pod 3 notification Pod 1 notification Pod 2 notification Pod 3 notification Pod 4 Scaler PATCH deployment/billing image: billing:v2

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Node 4 kubelet 48 Master etcd API Scheduler Node 1 kubelet Node 3 kubelet Dev billing Pod 1 cca Pod 1 cca Pod 2 Node 2 kubelet billing Pod 2 cca Pod 3 cca Pod 4 cca Pod 3 notification Pod 1 notification Pod 2 notification Pod 3 notification Pod 4 Scaler PATCH deployment/billing image: billing:v2 Modificando um deployment

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Node 4 kubelet 49 Master etcd API Scheduler Node 1 kubelet Node 3 kubelet Dev billing Pod 1 cca Pod 1 cca Pod 2 Node 2 kubelet billing Pod 2 cca Pod 3 cca Pod 4 cca Pod 3 notification Pod 1 notification Pod 2 notification Pod 3 notification Pod 4 Scaler PATCH deployment/billing image: billing:v2 Modificando um deployment

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Node 4 kubelet 50 Master etcd API Scheduler Node 1 kubelet Node 3 kubelet Dev billing Pod 1 cca Pod 1 cca Pod 2 Node 2 kubelet billing Pod 2 cca Pod 3 cca Pod 4 cca Pod 3 notification Pod 1 notification Pod 2 notification Pod 3 notification Pod 4 Scaler Modificando um deployment

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Node 4 kubelet 51 Master etcd API Scheduler Node 1 kubelet Node 3 kubelet Dev billing Pod 1 cca Pod 1 cca Pod 2 Node 2 kubelet billing Pod 2 cca Pod 3 cca Pod 4 cca Pod 3 notification Pod 1 notification Pod 2 notification Pod 3 notification Pod 4 Scaler Modificando um deployment

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O que tem mais?

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Comunicação e balanceamento de carga entre aplicações Service discovery

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Deﬁnição de quantidade de Pods baseado em uso de recursos como CPU dinamicamente Pod Auto Scaling

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Alocação e montagem de volumes dinamicamente. Storage provision

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Monitoramento do uso de recursos e saúde dos pods e do cluster em tempo real. Monitoring

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E muito mais!

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Estamos contratando! sou.nu/vagasnu

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DEVFEST BH 2018 Obrigado, DevFest! Alexandre Cisneiros [email protected] @Cisneiros

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