A guided journey of Cloud Native

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Nov 2015 Mar 2019

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Nov 2015 Mar 2019

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Nov 2015 Mar 2019

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Nov 2015 Mar 2019

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Nov 2015 Mar 2019 Fastest growing UK Bank 1.6M Customers

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☁ ?

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“construct a highly agile and highly available service from ephemeral and assumed broken components” - Adrian Cockcroﬅ

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How does Monzo operate? - AWS, GCP, and physical data centres - Cloud Native technologies:  Kubernetes, Docker, Calico, Cassandra, Kafka, NSQ, Etcd, Prometheus, Jaeger, Envoy, Elasticsearch… - Go based micro services  ⛅

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Feb 2015 Mar 2019 1000 services

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& Starting with a House

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☁

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⛈

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⛅

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Source Control CI system to test & build our apps Artisanally hand-crafted servers on AWS EC2 Monzo (early 2015) &

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Source Control CI system to test & build our apps Artisanally hand-crafted servers on AWS EC2 Go based micro services Cassandra as our database?! Monzo (early 2015) &

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( Building a Village

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Network saturation due to DB backups

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Pub/Sub Messaging — NSQ Deployment — CI system (Jenkins) Orchestration — Mesos & Marathon Error Tracking — Sentry Metrics — Inﬂux stack  Distributed locking — etcd Monzo (late 2015) (

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) The road to a Town

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Reliability & Scalability

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Reliability & Scalability

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kubernetes service service service service service service service service service service

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kubernetes service service service service service service service service service service

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kubernetes service service service service service service service service service service

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kubernetes service service service service service service service service service service

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Request Limit

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kubernetes service Prometheus service service Kafka linkerd Kafka service service etcd calico API service

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Monzo (mid 2016) ) Focus on reliability and scalability Containerisation — Docker Orchestration — Kubernetes Service mesh — linkerd Resilient messaging — Kafka

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Onwards to a City +

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Monzo (2018) + Scalable metrics — Prometheus Tracing — Jaeger Network Isolation — Calico Service Mesh (sidecar) — Envoy