neoakris

# This is a tutorial (how to guide optimized for learning)
# This is meant to be copy pasted line by line in bash
# A speed run of this method is available here: 
# https://gist.github.com/neoakris/f1c4b329901811360ce6269ca631c80b

# Set Input Vars (likely need to edit)
export PROJECT=my-gcp-project
export SA_SHORT_NAME=gcr-sa

# Additional Input Vars (can skip editing)

neoakris

#!/bin/bash
# A tutorial (learning optimized how to guide) of this same content with additional explanations is available here: 
# https://gist.github.com/neoakris/bd53146a7a610253abdbc1234ffb357b

# Set Input Vars (likely need to edit)
export PROJECT=my-gcp-project
export SA_SHORT_NAME=gcr-sa

# Additional Input Vars (can skip editing)
export SA_NAME=$SA_SHORT_NAME@$PROJECT.iam.gserviceaccount.com

neoakris

tee original-managedcert.yaml  << EOF
apiVersion: networking.gke.io/v1
kind: ManagedCertificate
metadata:
  name: managed-cert
spec:
  domains:
  - example.test
EOF

neoakris

Guide to doing a GKE HTTPS Cert Cutover from cluster1 to cluster2 with zero downtime

How to use:

1. Edit the input variables at the top
2. Copy paste steps one at a time into a bash/zsh terminal shell This will give better feedback and understanding of whats going on.

Phase 1: Prep Work

Phase 1 - Step 1: Provision 2 GKE Clusters and setup kubectx

neoakris

Reproducible Demo of Traefik 2.0 Traffic Mirroring

Overview

What to expect in this doc:

• Traefik 2.0 has traffic mirroring functionality that should work on generic Kubernetes, but there's no good how-to guides, let this be the first.
• This is a how-to guide, that's optimized for understanding

neoakris

Example of Kustomized Helm Install
(Using Helm's Post Rendering Feature)

Overview: Why would you want to do this?

Background Context:

• Question: What is a helm chart?
• Answer: helm charts are just templating engines that render generated yaml
  • input variables (with a mix of default and override values for those variables)
  • get plugged into golang templatized yaml
  • and output a wall of text of generated yaml
• Community Helm Charts:

neoakris

Overview

The following is based on 2 GCP / GKE How to Guides:

• https://cloud.google.com/stackdriver/docs/managed-prometheus/setup-managed
• https://cloud.google.com/stackdriver/docs/managed-prometheus/query

What this adds is additional checks / verification commands that can be run to help troubleshoot.

Step 0: Prereqs

• provisioned GKE autopilot cluster v1.26.5 with all defaults
• alias k=kubectl