juniorz

Software development hard truths

• Continuous Integration is a software development discipline, not your orchestrator tool.
• Branch-by-abstraction and trunk-based development is the right answer for adopting CI (https://twitter.com/jezhumble/status/1220036153488756736)
• Feature branches and PR features goes against the grain with adopting CI.
• Pair programming is hard and works (https://martinfowler.com/articles/on-pair-programming.html).

juniorz

Termos

• the one stop shop for: Posto Ipiranga
• ballpark figure: chute
• inside baseball: panelinha

Pronuncia

• silent: https://www.merriam-webster.com/video/why-is-there-a-c-in-indict
• affect / effect

juniorz

computer programs are the tangible output of a thought process - the conversion of a thought process into a product.

Edward H. Bersoff, "Elements of Software Configuration Management"

juniorz

• Dead Space development struggling to integrate changes from multiple teams/experts: https://youtu.be/BQ3iqq49Ew8?t=655
• Desktop apps: once in a while you kill a process eating all you RAM. Web apps: once in a while you kill the Google Chrome GPU task eating all your RAM after you open a GIF.
• Today's browser wars: migrating a customer's 100s open tab from Chrome to Firefox/Edge/Opera/Safari.

juniorz

"Those that know, do. Those that understand, teach."

Aristoteles (supposedly)

Goals

• Establish a taxonomy for this segment of software development industry (the domain).
• Define evaluation criteria for products in the solution space.
• Assess the landscape of the solution space and how they fit the market.
• Better understand the problem space.

juniorz

Kubernetes

• HorizontalPodAutoscaler takes into account Terminating pods when calculating the metrics. The consequence is if a pod has a bug on its termination procedure, terminating pods as part of a scale down triggers a scale up.
  • It once did the same for Pending pods.
• Can't omit clusterIP if you ever set it (even if to "") https://gitlab.com/gitlab-org/charts/gitlab/issues/1710#note_262760589
• How do you force HTTPS redirection on Ambassador: you use a nginx sidecar
• How do you force static HTTP responses (401, for example) on Ambassador: you use a nginx sidecar

Helm

juniorz

Tecnology and Society

• http://appropriatingtechnology.org/?q=node/296

Kubernetes autoscaling

• https://github.com/kubernetes/kubernetes/issues/1629
• https://github.com/kubernetes/community/blob/master/contributors/design-proposals/autoscaling/horizontal-pod-autoscaler.md
• https://github.com/kubernetes/community/blob/master/contributors/design-proposals/autoscaling/vertical-pod-autoscaler.md

juniorz

1. Install Envoy (and Istio proxy) dependencies
   1. https://github.com/envoyproxy/envoy/blob/master/bazel/README.md
   2. https://github.com/istio/proxy/blob/3781be0e624470a4ee613c4ffc9816976f5dd701/.circleci/config.yml#L95
      1. Install XCode
      2. sudo xcode-select -s /Applications/Xcode.app/Contents/Developer; sudo xcodebuild -license; bazel clean --expunge; See: https://github.com/bazelbuild/bazel/issues/6056#issuecomment-456913324
   3. https://www.envoyproxy.io/docs/envoy/latest/install/building#requirements
2. Configure the dev environment
   1. https://github.com/istio/istio/wiki/Preparing-for-Development#setting-up-environment-variables
   2. https://medium.com/@nadundesilva/building-istio-from-source-on-linux-be860d660aa7

juniorz

Certified Kubernetes Administrator (CKA)

Curriculum v1.14.1

Source: https://github.com/cncf/curriculum/blob/master/CKA_Curriculum_V1.14.1.pdf

Core Concepts (19%)

Understand the Kubernetes API primitives

juniorz

Unlock Telepatria vtelca v865m movilnet

12345678 (was the initial code)

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