CoreOS Kube Operators Seattle Kubernetes Meetup on April 12th, 2017 http://bit.ly/operatorhacks

Operator.html

<section>
  <section id='stateful-problems' data-markdown>
    ## Operators
    ### Six Months Later
  </section>
</section>
<section>
  <section id='the-problem'>
    <h3>The Problem with Stateful</h3>
    <ol>
    <p class='fragment'>Stateful applications retain information about each of its communication partners</p>
    <p class='fragment'>Deploying and scaling these applications requires processes specific to each application</p>
    <p class='fragment'>This clearly presents a problem deploying these applications in Kubernetes</p>
  </section>
  <section id='kubernetes-and-stateful'>
    <h3>Kubernetes and Stateful</h3>
    <p class='fragment'>Deploying stateful applications would either be forced to only use one pod or require accessing the Pods after deployment</p>
    <p class='fragment'>Scaling stateful applications is forced to occur as a response to human interaction, rather than automatically</p> 
    <p class='fragment'>None of the inherant disaster recovery of Kubernetes, either there will be total outtage from Pods redeploying or more manual steps will need to be ran to recovery functionality</p>
  </section>
</section>
<section id='k8s-operators' data-markdown>
  ## Kubernetes Operators
</section>
<section>
  <section id='what-are-operators'>
    <h3>What are Operators?</h3>
    <p class='fragment'>Kube Operators establish a pattern for introducing higher-order interfaces that represent the logical domain expertise (and perhaps the ideal product output) of a Kubernetes SRE</p>
    <p class='fragment'><a href="https://coreos.com/blog/introducing-operators.html">blog post: "Introducing Operators"</a></p>
  </section> 
  <section id='k8s-controllers' data-markdown>
  ### K8s Controllers
         
  Controllers work to regulate the declarative nature of the platform state, reconsiling imbalances via a basic control loop
    
  https://kubernetes.io/docs/admin/kube-controller-manager/
    
  Kubernetes allows you to introduce your own custom controllers!
  </section>  
  <section id='k8s-tpr'>
  <h3>Third Party Resources (TPRs)</h3>
 
  TPRs allow you to establish new k8s primitives, extending the capabilities of the platform by allowing you to add your own terminology to the modeling language
    
  <a href>https://kubernetes.io/docs/user-guide/thirdpartyresources/</a>
  <img alt="example" src="http://i.imgur.com/hApw6P4.png" style="width:50%"/>
  </section>
  <section id='best-practices' data-markdown>
  ### Best Practices for Writing Operators
  
  https://coreos.com/blog/introducing-operators.html#how-can-you-create-an-operator
  </section>  
</section>
<section id='the-solution' data-markdown>
  ## So, how do they help?
</section>
<section>
  <section id='no-problem'>
    <h2>Deployment and Scaling!</h2>
    <p class='fragment'>Human interaction with stateful applications minimized as operators handle domain knowledge tasks</p>
    <p class='fragment'>Customer Controllers maintain the current and desired state of the application, adjusting pod counts as necessary</p>
  </section>
  <section id='resiliency'>
    <h2>Resiliency!</h2>
    <p class='fragment'>Operators don't need to be active for the application itself to run</p>
    <p class='fragment'>If a stateful pod goes down the custom controller will create new pods and repair clusters seemlessly</p>
    <p class='fragment'>Helper pods, like ETCD's optional backup pod, can provide extra functionality to the cluster including disaster recovery</p>
  </section>
  <section id='upgrades'>
    <h2>Upgrades!</h2>
    <p class='fragment'>Custom Controllers maintain the desired state of the cluster, which includes version</p>
    <p class='fragment'>Updating clusters is as easy as scaling up a cluster, tell the operator which version you need and it will roll out new pods at the desired version</p>
  </section>
</section>
<section>  
  <section id='operator-examples' data-markdown>
  ## Operator Examples
  </section>  

  <section id='etcd' data-markdown>
  ### Etcd
    
  blog post: https://coreos.com/blog/introducing-the-etcd-operator.html
    
  sources: https://github.com/coreos/etcd-operator
  
  demo video: https://www.youtube.com/watch?v=n4GYyo1V3wY
  </section>  
  <section id='prometheus' data-markdown>
  ### Prometheus
  
  blog post: https://coreos.com/blog/the-prometheus-operator.html
 
  sources: https://github.com/coreos/prometheus-operator
  
  demo video: https://www.youtube.com/watch?v=GYSKEd9FePk
  </section>  
  <section id='kube-cert-manager' data-markdown>
  ### Kube Cert Manager
    
  https://github.com/kelseyhightower/kube-cert-manager
  </section>  
  <section id='rook' data-markdown>
  ### Rook (Storage)
  
  https://rook.io/
  </section>  
  <section id='elasticsearch' data-markdown>
  ### Elastic Search
    
  https://github.com/upmc-enterprises/elasticsearch-operator
  </section>    
  <section id='postgres' data-markdown>
  ### PostgreSQL
  
  Postgres Operator from CrunchyData
 
  https://github.com/CrunchyData/postgres-operator
  </section>      
  <section id='tectonic' data-markdown>
  ### Tectonic
  Tectonic uses operators to manage "self-hosted" Kubernetes
  
  [k8s cluster upgrades made easy](https://twitter.com/ryanj/status/846866079792062464)
  </section>  
  
<!--
  <section id='' data-markdown>
  ### 
  </section>  
  <section id='' data-markdown>
  ###
  </section>  
-->
  
</section>
<section>
  <h2>Demo</h2>
</section>
<section>
  <img alt="etcd" src="http://i.imgur.com/u2OKtkf.gif" style="width:100%"/>
</section>
<section>
  <img alt="etcd2" src="http://i.imgur.com/zIpNSjN.gif" style="width:100%"/>
</section>
<section id='follow-up' data-markdown>
  ### Follow-up Topics and Links
  
  1. [Brandon Philips' TPR list](https://gist.github.com/philips/a97a143546c87b86b870a82a753db14c)
  2. [Eric Chiang's "Custom Go Controllers" presentation](https://github.com/ericchiang/go-1.8-release-party)
  3. [Josh Rosso's Operator talk from FOSDEM (same stuff at Kubecon)](https://docs.google.com/presentation/d/1MV029sDifRV2c33JW_83k1tjWDczCfVkFpKvIWuxT6E/edit#slide=id.g1c65fcd8a9_0_54 )
  4. [Paul Burt's new blog post on community use of operators](https://coreos.com/blog/kubernetes-operators-ecosystem.html)
  5. [ETCD autorecovery demo from Brandon](https://www.youtube.com/watch?v=9sD3mYCPSjc)
  6. [Sign up to receive the CoreOS Community Newsletter](http://coreos.com/newsletter)
     
</section>
<section id='coreos-jobs' data-markdown>
  ### CoreOS is hiring!
    
  Join us in our mission to help *Secure the Internet!*
    
  [coreos.com/careers](https://coreos.com/careers)
</section>
<section id='coreos-training' data-markdown>
  ### CoreOS Training

  Want to learn more? 
    
  Check out the lineup of pro training courses from CoreOS!
  
  [coreos.com/training](http://coreos.com/training)
</section>  
<section id='coreos-fest' data-markdown>
  ### CoreOS Fest

  Tickets are on sale now!
  
  [coreos.com/fest](http://coreos.com/fest)
</section>  
<section id='tectonic-free-teir' data-markdown>
  ### Tectonic Free Tier
  
    Try CoreOS Tectonic today
  
    [coreos.com/tectonic](http://coreos.com/tectonic)
    
  Your first ten Enterprise-grade Kubernetes nodes are free!
  </section>  
</section>