How to Ship Akka to Production

by Paweł Lipski plipski@virtuslab.com

Agenda

  1. Docker

  2. sbt (Scala built tool)

  3. Continuous Integration

  4. akka-serialization-helper

  5. Kubernetes

  6. Log collection

  7. Observability

Docker in a nutshell

Docker in a nutshell

Imagine a virtual machine... but so lightweight you can instantly launch 10s of them on your laptop.

 

Plus you can configure what's installed on that machine with an intuitive language (Dockerfile).

 

Plus you can download ready machines with e.g. mysql/Nginx/Python/whatever readily installed

Docker in a nutshell

# build your own Docker image ("lightweight VM")
docker build -f my.Dockerfile -t foobar .
docker run foobar

 

# or, use ready stuff:
docker run nginx
docker run postgres
# etc.

Docker in a nutshell

FROM ubuntu:20.04

SHELL ["/bin/bash", "-e", "-o", "pipefail", "-u", "-x", "-c"]

ENV DEBIAN_FRONTEND=noninteractive
ENV APT_GET_FLAGS="-y -q -o=Dpkg::Use-Pty=0"

# Let's move the instructions that do NOT depend on Python version to the top, for the sake of better use of build cache
RUN apt-get update $APT_GET_FLAGS
RUN apt-get install $APT_GET_FLAGS gnupg wget
RUN . /etc/os-release && echo "deb https://apt.repos.neuron.amazonaws.com ${VERSION_CODENAME} main" > /etc/apt/sources.list.d/neuron.list
RUN wget -qO- https://apt.repos.neuron.amazonaws.com/GPG-PUB-KEY-AMAZON-AWS-NEURON.PUB | apt-key add -
RUN apt-get update $APT_GET_FLAGS
RUN apt-get install $APT_GET_FLAGS aws-neuron-tools
ENV PATH=$PATH:/opt/aws/neuron/bin

RUN groupadd --gid=1000 cinnaroll
RUN useradd --create-home --gid=1000 --uid=1000 --no-log-init foobar

Docker in a nutshell

Docker in a nutshell

sbt

"simple build tool" xD

 

In fact relatively (over)complicated, compared to Gradle

 

Still a better choice for building Scala than Gradle,

due to abundance of well-maintained plugins

and first-class support for Scala

sbt

sbt <module>/Docker/publish

Continuous Integration

Continuous Integration

Continuous Integration

Continuous Integration

Continuous Integration

Continuous Integration

Continuous Integration

Kubernetes a nutshell

There needs to be quite a loooot of Docker containers in a modern app (think: backend, frontend, sometimes worker services, sometimes database(s))

 

Plus it would be nice to systematically define things like how many replicas are needed, what are the networking rules etc.

Kubernetes a nutshell

Kubernetes a nutshell

Kubernetes a nutshell

Kubernetes a nutshell

Kubernetes a nutshell

One of the most useful resources: Deployment

Specify number of replicas R,

and Deployment strives to always have R replicas of the given set of Docker containers ("Pod") around.

Kubernetes a nutshell

Binding between cluster nodes and Kubernetes pods

 

Making sure that the new cluster and old cluster are kept separate during a rollout of new version

Log collection

  • Filebeat (collect)
  • ElasticSearch (store)
  • Kibana (lookup)

Observability

  • Kamon (has support for Akka)
  • Prometheus (database)
  • Grafana (display)

Observability: kamon-akka

Observability: Grafana

Questions!

How to Ship Akka (and not only) to Production

By plipski

How to Ship Akka (and not only) to Production

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