KCNA: P1 & P2 Cloud Arch. Fundyzz Containers w/Docker

Blog post includes covering Cloud Architecture Fundamental’s in preparation for the KCNA.

• Autoscaling
  • Reactive
  • Predictive
  • Vertical
  • Horzontal
  • Cluster Autoscaler
    • HPAs
      • Scale # of replicas in an app
    • VPAs
      • Scale resource requests & limits of a pod
  • Keda
    • Scaled object should scale & what are triggers while scaling to 0
• Serverless
  • Event driven & billed accordingly upon execution
  • Knative & OpenFaaS & CloudEvents
• Cloud Native Personas
  • DevOps Engineer
  • Site Reliability Engineer
  • CloudOps Engineer
  • Security Engineer
  • DevSecOps Engineer
  • Full Stack Developer
  • Data Engineer
• Open Standards
  • Docker, OCI, runc
  • PodMan – image-spec
  • Firecracker – runtime-spec
  • Container Network Interface (CNI)
    • Calico
  • Container Storage Interface (CSI)
    • Rook
  • Container Runtime Interface (CRI)
    • Goes to containerd, kata, firecracker, etc..
  • Service Mesh Interface (SMI)
    • Istio!

Blog post includes covering Containers w/Docker in preparation for the KCNA.

• Docker Desktop
  • docker vs docker desktop
  • k8s w/docker desktop
• Containers:
  • History womp womp
  • Linux
    • user, pid, network, mount, uts, ipc, namespace, & cgroups
• Images
  • container vs container image
  • registry
  • tag
  • layers
  • union
  • digest vs ids
• Running Containers
  • docker run -it –rm…
• Container Networking Services/Volumes
  • docker run –rm nginx
  • docker run -d –rm nginx
  • docker ps
  • docker run -d –rm -P nginx
  • curl
  • docker run -d –rm -p 12345:80 nginx
  • docker exec -it bash
• Building Containers
  • https://github.com/abishekvashok/cmatrix
  • docker pull, images, build . -t,
  • vim
    • FROM
    • #maintainer
    • LABEL
  • docker run –rm -it sh
    • git clone
      • apk update, add git
    • history
  • vim
    • history
  • docker buildx create, use, build –no-cache linux/amd64, . -t –push
  • docker system prune