Cloud Chaos and Microservices Mayhem

by Holly Cummins

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cloud chaos and microservices mayhem Holly Cummins Red Hat @holly_cummins Dublin JUG

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#RedHat @holly_cummins things you need to do well in 2022:

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#RedHat @holly_cummins handwashing things you need to do well in 2022:

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#RedHat @holly_cummins handwashing apps things you need to do well in 2022:

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#RedHat @holly_cummins handwashing apps ops things you need to do well in 2022:

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#RedHat @holly_cummins handwashing apps ops devops things you need to do well in 2022:

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#RedHat @holly_cummins handwashing apps ops devops devsecops things you need to do well in 2022:

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#RedHat @holly_cummins handwashing apps ops devops devsecops finops things you need to do well in 2022:

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#RedHat @holly_cummins a few

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#RedHat @holly_cummins

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#RedHat @holly_cummins technology changes fast (duh)

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#RedHat @holly_cummins technology changes fast (duh) … but it’s taking us a while to catch up to cloud

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#RedHat @holly_cummins technology changes fast (duh) … but it’s taking us a while to catch up to cloud

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#RedHat @holly_cummins hardware old way logs

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#RedHat @holly_cummins hardware old way cloud way logs container logs

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#RedHat @holly_cummins hardware old way cloud way logs logs

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#RedHat @holly_cummins hardware old way cloud way logs oops

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#RedHat @holly_cummins hardware old way cloud way logs container logs

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#RedHat @holly_cummins hardware old way cloud way logs container logs

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#RedHat @holly_cummins hardware old way cloud way logs logs

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#RedHat @holly_cummins hardware old way cloud way logs logs container logs container logs container logs container logs

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#RedHat @holly_cummins hardware old way cloud way logs logs container logs container logs container logs container logs

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#RedHat @holly_cummins hardware old way cloud way logs logs container logs container logs container logs container logs aggregation + correlation

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#RedHat @holly_cummins hardware old way cloud way logs logs container logs container logs container logs container logs aggregation + correlation open telemetry (open tracing)

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#RedHat @holly_cummins

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#RedHat @holly_cummins good news: observability is ‘fixed’

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#RedHat @holly_cummins good news: observability is ‘fixed’ bad news: not all of us are using it

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#RedHat @holly_cummins memory footprint is money startup time is money

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#RedHat @holly_cummins all that dynamism we worked so hard is (now) a bad idea

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#RedHat @holly_cummins ahead of time optimisation is (now) a good idea

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#RedHat @holly_cummins

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#RedHat @holly_cummins garbage collection and microservices

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#RedHat @holly_cummins garbage collection and microservices

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#RedHat @holly_cummins garbage collection and microservices

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#RedHat @holly_cummins garbage collection and microservices

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#RedHat @holly_cummins garbage collection and microservices if you chain 100 microservices together, you are almost guaranteed a GC pause

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#RedHat @holly_cummins

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#RedHat @holly_cummins

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#RedHat @holly_cummins the JVM tunes itself differently on servers

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#RedHat @holly_cummins the JVM tunes itself differently on servers … but what’s a server?

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#RedHat @holly_cummins answer(ish):

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#RedHat @holly_cummins // This is the working definition of a server class machine: // >= 2 physical CPU's and >=2GB of memory answer(ish): actual hotspot source code

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#RedHat @holly_cummins

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#RedHat @holly_cummins takeaway: don’t shrink your containers too much or your JVM will make bad decisions advice accurate as of June 2022. all performance advice should be independently verified. do not try this at home without testing first. your mileage may vary.

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#RedHat @holly_cummins wait, isn’t that the opposite of the advice in the previous section? should my containers be big or small?

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#RedHat @holly_cummins this is the chaos part :) wait, isn’t that the opposite of the advice in the previous section? should my containers be big or small?

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#RedHat @holly_cummins The cloud makes it so easy to provision hardware.

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#RedHat @holly_cummins That doesn’t mean the hardware is free.

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#RedHat @holly_cummins That doesn’t mean the hardware is free.

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#RedHat @holly_cummins That doesn’t mean the hardware is free. Or useful.

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#RedHat @holly_cummins That doesn’t mean the hardware is free. Or useful. Or shuts itself off.

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#RedHat @holly_cummins Hey boss, I created a Kubernetes cluster.

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#RedHat @holly_cummins Hey boss, I created a Kubernetes cluster. I forgot it for 2 months.

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#RedHat @holly_cummins Hey boss, I created a Kubernetes cluster. I forgot it for 2 months. … and it’s €1000 a month.

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Photo by daveynin, flickr

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#RedHat @holly_cummins 2017 survey 25% of 16,000 servers doing no useful work

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#RedHat @holly_cummins 2017 survey 25% of 16,000 servers doing no useful work “perhaps someone forgot to turn them off”

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#RedHat @holly_cummins finops figuring out who in your company forgot to turn off their cloud

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#RedHat @holly_cummins companies that went out of business for cloud cost accidents

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@holly_cummins #RedHat

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#RedHat @holly_cummins (See Troy tomorrow at GOTO !)

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#RedHat @holly_cummins (See Troy tomorrow at GOTO !)

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#RedHat @holly_cummins $11,448.30 (See Troy tomorrow at GOTO !)

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#RedHat @holly_cummins “I did find a setting on your plan that set the max cacheable file size to 15GB and it looks like your zipfile is 18GB big” $11,448.30 (See Troy tomorrow at GOTO !)

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#RedHat @holly_cummins

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#RedHat @holly_cummins maybe this is the chaos part

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#RedHat @holly_cummins microservices are not the goal

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#RedHat @holly_cummins microservices are not the goal they are the means

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#RedHat @holly_cummins distributed monolith

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#RedHat @holly_cummins distributed monolith but without compile-time checking … or guaranteed function execution

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#RedHat @holly_cummins distributed monolith but without compile-time checking … or guaranteed function execution

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#RedHat @holly_cummins distributed monolith but without compile-time checking … or guaranteed function execution

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#RedHat @holly_cummins distributed monolith but without compile-time checking … or guaranteed function execution

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#RedHat @holly_cummins “each of our microservices has duplicated the same object model … with twenty classes and seventy fields”

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#RedHat @holly_cummins Microservice Domain

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#RedHat @holly_cummins Microservice Domain

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#RedHat @holly_cummins Microservice Domain (this is bad)

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#RedHat @holly_cummins How to test a fire alarm?

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#RedHat @holly_cummins

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#RedHat @holly_cummins unit testing a fire alarm

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#RedHat @holly_cummins uh … is that enough?

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#RedHat @holly_cummins contract testing a fire alarm

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#RedHat @holly_cummins contract testing a fire alarm

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@holly_cummins to the code!

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#RedHat @holly_cummins demo recap: https://github.com/holly-cummins/house-of-microservices-quarkus-contract-testing-sample

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#RedHat @holly_cummins demo recap: https://github.com/holly-cummins/house-of-microservices-quarkus-contract-testing-sample

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#RedHat @holly_cummins demo recap: • consumer-driven contract testing can save your bacon • pact is a mock for the consumer • pact is a functional test for the producer • shared json contracts aligns expectations across services

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#RedHat @holly_cummins so … don’t assume cloud is a solved problem don’t assume microservices will solve all your problems contract testing may solve some of your problems

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thank you @holly_cummins slides