# How I understand the cloud <!-- .slide: data-background-image="https://i.imgur.com/pXwGDNn.jpg" --> ---- slide: https://hackmd.io/@petrkotas/cnmu17 --- ## Who am I? - Cloud enthusiast - Founder of cloudnative.cz - Senior engineer @Red Hat / Virtualization - I use spaces --- ## My path to the Cloud ---- ### Took longer that you would suspect ---- ### e-shop in PHP * good old FTP <!-- .element: class="fragment" data-fragment-index="1" --> * start the service on the server <!-- .element: class="fragment" data-fragment-index="2" --> * everything by hand <!-- .element: class="fragment" data-fragment-index="3" --> ---- ### distributed algorithms on supercomputer * first "close-to" cloud encounter <!-- .element: class="fragment" data-fragment-index="1" --> * distributed programs runs on the cluster connected with the MPI <!-- .element: class="fragment" data-fragment-index="2" --> * the programs are executed by the scheduler <!-- .element: class="fragment" data-fragment-index="3" --> * the supercomputer provided a framework to write the apps <!-- .element: class="fragment" data-fragment-index="4" --> ---- ### distributed fulltext @Seznam * distributed search <!-- .element: class="fragment" data-fragment-index="1" --> * collaboration with admin team to deploy <!-- .element: class="fragment" data-fragment-index="2" --> * not dynamic <!-- .element: class="fragment" data-fragment-index="3" --> * all manual <!-- .element: class="fragment" data-fragment-index="4" --> ----  ---- :::danger **All done manually** ::: ---- ### Own startup Cosidat * fully benefit from the AWS * containers and stuff ---- Breaking point for me to realize, * I love the cloud * I was working with cloud all the time ---- ### Red Hat - virtualization/cloud * virtualization on top of the Kubernetes * tooling around Kubernetes ---- :::warning **TIP 1:** Cloud is the state of the mind. ::: ---- It is share the state of the mind, why we started **Cloud Native Czechia** ---- It is the state of the mind, I will try to share in this talk. --- ## So what is cloud ---- ### Cloud is a mess ----  ---- <span>Where to start?<!-- .element: class="fragment" data-fragment-index="1" --></span> <span>How to start?<!-- .element: class="fragment" data-fragment-index="2" --></span> --- ### Level of involvedness ----  ---- ### IAAS ----  ---- * simplest way to the cloud<!-- .element: class="fragment" data-fragment-index="1" --> * use the cloud as fancy VPS<!-- .element: class="fragment" data-fragment-index="2" --> * move existing app to the cloud<!-- .element: class="fragment" data-fragment-index="3" --> ---- #### The tuning utility for fulltext * python webpage <!-- .element: class="fragment" data-fragment-index="1" --> * compute differences from the search queries <!-- .element: class="fragment" data-fragment-index="2" --> * stores the users and authenticates them <!-- .element: class="fragment" data-fragment-index="3" --> * configuration is passed from the install package <!-- .element: class="fragment" data-fragment-index="4" --> * dependencies install as package dependencies <!-- .element: class="fragment" data-fragment-index="5" --> * it relies on system wide packages <!-- .element: class="fragment" data-fragment-index="6" --> ---- So what is the benefit over the normal VPS? ---- You can automate the infrastructure via API and for instance [terraform](https://www.terraform.io/). ---- :::warning **TIP 2:** Automate your infrastructure. ::: ---- Am I cloud-native yet? ---- **No**, you just run in the cloud. ---- #### Sprinkle some containers on top ---- Containerize the search tuner ---- * read configuration from environment <!-- .element: class="fragment" data-fragment-index="1" --> * compute differences in different process <!-- .element: class="fragment" data-fragment-index="2" --> * store data to mounted volume <!-- .element: class="fragment" data-fragment-index="3" --> * database go out <!-- .element: class="fragment" data-fragment-index="4" --> ---- So we are in the container. Update infra scripts and go. ---- Am I cloud-native yet? ---- **No**, you are still not benefiting from the cloud. Barely using it. ---- You can do better, save some more work. ---- :::warning **TIP 3:** Automate your workflow and deployment ::: ---- * Cover you app with tests to play it safe <!-- .element: class="fragment" data-fragment-index="1" --> * Deploy only for part of the users <!-- .element: class="fragment" data-fragment-index="2" --> * Deploy as often as you can <!-- .element: class="fragment" data-fragment-index="3" --> * Be ready to roll back <!-- .element: class="fragment" data-fragment-index="4" --> ---- While we are developing the app. ---- :::warning **TIP 4:** Cloud is rich for services and components you can use. ::: ---- On top of building blocks, cloud offers a plethora of services ready to use. ---- Services, like azure ML are * libraries on steroids * offer expert knowledge ---- For the search tuner, * use hosted DB * use object store ---- Am I cloud-native yet? ---- **Technically**, using the power of the cloud and automation. But it can be better. ---- :::info Cloud is a mix of building blocks, services and best practices. Which all can be used via API. ::: --- ### PAAS ---- The search tuner is still little static. ----  ---- It would be better if it reacted to the user load. ---- We can switch from pure infrastructure to the managed container platform. * [Azure container instances](https://azure.microsoft.com/en-us/services/container-instances/) * [Amazon Fargate](https://aws.amazon.com/fargate/) ---- To enable auto-scaling, update the app to be: * stateless - dump the state outside (Redis) * pass the state along so any instance can continue the work ---- Enable auto-scaling and profit. ---- :::warning **TIP 5:** Be careful, you pay for everything in cloud. ::: --- ## How does Kubernetes fit in ----  ---- Offered on all major cloud providers. ---- #### CNCF addons ----  ---- In theory build the same platform everywhere. ---- ## Wrap up - Cloud is a state of the mind - Automate your infrastructure - Automate workflow and deployment - Use existing services, don't reinvent the wheel - Be careful, you pay for everything --- ## Thank you for your attention! :heart: You can find me on - cloudnative.cz - github.com/petrkotas - twitter.com/petrkotas - linkedin.com/in/petrkotas