Tweet
Tweet

Slide 1

Slide 1 text

Building Reliable APIs Matt Heath, Monzo

Slide 2

Slide 2 text

Matt Heath, Monzo @mattheath

Slide 3

Slide 3 text

No content

Slide 4

Slide 4 text

No content

Slide 5

Slide 5 text

monoliths traditional dev

Slide 6

Slide 6 text

No content

Slide 7

Slide 7 text

What do we mean by “reliable”?

Slide 8

Slide 8 text

No content

Slide 9

Slide 9 text

Contacting us Using your debit card Making payments Freezing your card 
 Viewing your balance Viewing recent transactions Sending emoji reactions Setting your profile picture Viewing merchant logos

Slide 10

Slide 10 text

Contacting us Using your debit card Making payments Freezing your card 
 Viewing your balance Viewing recent transactions Sending emoji reactions Setting your profile picture Viewing merchant logos

Slide 11

Slide 11 text

?

Slide 12

Slide 12 text

Application

Slide 13

Slide 13 text

Application

Slide 14

Slide 14 text

APPLICATION Application

Slide 15

Slide 15 text

No content

Slide 16

Slide 16 text

No content

Slide 17

Slide 17 text

?

Slide 18

Slide 18 text

No content

Slide 19

Slide 19 text

API

Slide 20

Slide 20 text

API

Slide 21

Slide 21 text

API Gateway API Service API Service API Service API Service API Service API Service API Service API Service

Slide 22

Slide 22 text

No content

Slide 23

Slide 23 text

No content

Slide 24

Slide 24 text

No content

Slide 25

Slide 25 text

API Gateway Accounts Cards Pots Emojis Payments …

Slide 26

Slide 26 text

API Gateway Accounts Cards Pots Emojis Payments … New
 Exciting
 API!!

Slide 27

Slide 27 text

Cards Pots Emojis Payments … API Gateway Accounts New
 Exciting
 API!!

Slide 28

Slide 28 text

Cards Pots Emojis Payments … API Gateway Accounts New
 Exciting
 API!!

Slide 29

Slide 29 text

API Gateway Accounts Cards Pots Emojis Payments … New
 Exciting
 API!!

Slide 30

Slide 30 text

No content

Slide 31

Slide 31 text

pod

Slide 32

Slide 32 text

pod container container container

Slide 33

Slide 33 text

pod API service

Slide 34

Slide 34 text

pod

Slide 35

Slide 35 text

pod

Slide 36

Slide 36 text

pods replica set

Slide 37

Slide 37 text

replica set pods deployment

Slide 38

Slide 38 text

pods replica set deployment

Slide 39

Slide 39 text

pods replica set deployment change

Slide 40

Slide 40 text

deployment change old pods old replica set

Slide 41

Slide 41 text

deployment change old pods old replica set new replica set

Slide 42

Slide 42 text

deployment change old pods old replica set new replica set new pod

Slide 43

Slide 43 text

deployment change old pods old replica set new replica set new pod

Slide 44

Slide 44 text

deployment change old replica set new pods new replica set

Slide 45

Slide 45 text

deployment change new replica set new pods

Slide 46

Slide 46 text

deployment replica set pods

Slide 47

Slide 47 text

pods

Slide 48

Slide 48 text

pods service

Slide 49

Slide 49 text

pods service kubedns

Slide 50

Slide 50 text

pods service routing - static cluster IP managed replicas resource allocations rollout strategies liveness checks anti-affinity, etc kubedns routing - “service name”

Slide 51

Slide 51 text

?

Slide 52

Slide 52 text

machine

Slide 53

Slide 53 text

machine machine

Slide 54

Slide 54 text

machine machine machine machine machine machine

Slide 55

Slide 55 text

machine machine machine machine machine machine Kubernetes

Slide 56

Slide 56 text

machine machine machine machine machine kubelet

Slide 57

Slide 57 text

kubelet kubelet kubelet kubelet kubelet kubelet

Slide 58

Slide 58 text

kubelet kubelet kubelet kubelet kubelet kubelet Kubernetes Master

Slide 59

Slide 59 text

kubelet kubelet kubelet kubelet kubelet kubelet Kubernetes Master etcd

Slide 60

Slide 60 text

kubernetes

Slide 61

Slide 61 text

kubernetes service service service service service service service service service service

Slide 62

Slide 62 text

kubernetes service service service service service service service service service service

Slide 63

Slide 63 text

kubernetes service service service service service service service service service service

Slide 64

Slide 64 text

kubernetes service service service service service service service service service service

Slide 65

Slide 65 text

kubernetes service service service service service service service service service service service service service

Slide 66

Slide 66 text

kubernetes service service service service service service service service service service

Slide 67

Slide 67 text

Reliable inter-service communication

Slide 68

Slide 68 text

Service Service

Slide 69

Slide 69 text

Service Service Service Service

Slide 70

Slide 70 text

Service Service Service Service Kubernetes
 Service

Slide 71

Slide 71 text

Service Discovery Load Balancing Timeouts and Expirations Retries Rate Limiting Connection Pooling Circuit Breaking Failure Detection Metrics and Tracing Interrupts Context Propagation

Slide 72

Slide 72 text

Service Discovery Load Balancing Timeouts and Expirations Retries Rate Limiting Connection Pooling Circuit Breaking Failure Detection Metrics and Tracing Interrupts Context Propagation

Slide 73

Slide 73 text

Service Service Service Service ?

Slide 74

Slide 74 text

Service Service Service Service linkerd

Slide 75

Slide 75 text

Service linkerd

Slide 76

Slide 76 text

Service linkerd service
 discovery

Slide 77

Slide 77 text

Service Service Service Service linkerd service
 discovery

Slide 78

Slide 78 text

Service Service Service Service linkerd

Slide 79

Slide 79 text

Service Service Service Service linkerd

Slide 80

Slide 80 text

Service Service Service Service linkerd

Slide 81

Slide 81 text

Service Service Service Service linkerd

Slide 82

Slide 82 text

Event Driven
 Architecture

Slide 83

Slide 83 text

Service A Service B Load Balancer Edge Gateway API Service

Slide 84

Slide 84 text

API Service Service A Service B Load Balancer Edge Gateway

Slide 85

Slide 85 text

API Service Service A Service B Load Balancer Edge Gateway Service D Service E

Slide 86

Slide 86 text

API Service Service A Service B Load Balancer Edge Gateway Service C Service D Service E

Slide 87

Slide 87 text

API Service Service A Service B Load Balancer Edge Gateway Service C Service D Service E

Slide 88

Slide 88 text

API Service Service A Service B Load Balancer Edge Gateway Service C Service D Service E

Slide 89

Slide 89 text

API Service Service A Service B Load Balancer Edge Gateway Service C Service D Service E

Slide 90

Slide 90 text

API Service Service A Service B Load Balancer Edge Gateway Service C Service D Service E Service D

Slide 91

Slide 91 text

API Service Service A Service B Load Balancer Edge Gateway Service C Service D Service E Service D

Slide 92

Slide 92 text

API card-api card-processing cards transactions balance transaction-enrichment merchant feed-generator feed apns API card-api card-processing cards transactions balance transaction-enrichment merchant feed-generator feed apns

Slide 93

Slide 93 text

API card-api card-processing cards transactions balance transaction-enrichment merchant feed-generator feed apns API card-api card-processing cards transactions balance transaction-enrichment merchant feed-generator feed apns

Slide 94

Slide 94 text

API card-api card-processing cards transactions balance transaction-enrichment merchant feed-generator feed apns API card-api card-processing cards transactions balance transaction-enrichment merchant feed-generator feed apns

Slide 95

Slide 95 text

API card-api card-processing cards transactions balance transaction-enrichment merchant feed-generator feed apns API card-api card-processing cards transactions balance transaction-enrichment merchant feed-generator feed apns

Slide 96

Slide 96 text

API card-api card-processing cards transactions balance transaction-enrichment merchant feed-generator feed apns API card-api card-processing cards transactions balance transaction-enrichment merchant feed-generator feed apns

Slide 97

Slide 97 text

API card-api card-processing cards transactions balance transaction-enrichment merchant feed-generator feed apns API card-api card-processing cards transactions balance transaction-enrichment merchant feed-generator feed apns

Slide 98

Slide 98 text

No content

Slide 99

Slide 99 text

API card-api card-processing cards transactions balance transaction-enrichment merchant feed-generator feed apns API card-api card-processing cards transactions balance transaction-enrichment merchant feed-generator feed apns

Slide 100

Slide 100 text

No content

Slide 101

Slide 101 text

Critical Path

Slide 102

Slide 102 text

How do we make systems reliable?

Slide 103

Slide 103 text

Masterless systems No single points of failure Simple / small components Minimise critical path Queue deferrable tasks Automated failure correction

Slide 104

Slide 104 text

No content

Slide 105

Slide 105 text

No content

Slide 106

Slide 106 text

No content