crossplane.md

API (CRDs) & State Management (Controllers) With Crossplane

TODO: Intro

Setup

Watch Nix for Everyone: Unleash Devbox for Simplified Development if you are not familiar with Devbox. Alternatively, you can skip Devbox and install all the tools listed in devbox.json yourself.

Skip executing devbox shell if you are already inside the Shell from one of the previous episodes.

devbox shell

source .env

Watch The Future of Shells with Nushell! Shell + Data + Programming Language if you are not familiar with Nushell. Alternatively, you can inspect the dot.nu script and transform the instructions in it to Bash or ZShell if you prefer not to use that Nushell script.

./dot.nu setup idp_crossplane $HYPERSCALER

source .env

Do

cat crossplane/repo.yaml

kubectl --namespace production apply --filename crossplane/repo.yaml

crossplane beta trace --namespace production githubclaim cncf-demo-app

Wait until all the resources are Available.

git clone "https://github.com/$GITHUB_USER/cncf-demo-app"

cd cncf-demo-app

gh pr list

gh pr view init --json files

gh pr merge init --rebase

git pull

cat main.go

mkdir apps

cp ../crossplane/$HYPERSCALER-sql.yaml apps/silly-demo-db.yaml

cp ../crossplane/$HYPERSCALER-sql-password.yaml \
    apps/silly-demo-db-password.yaml

cat apps/silly-demo-db.yaml

cat apps/silly-demo-db-password.yaml

kubectl --namespace production apply \
    --filename apps/silly-demo-db-password.yaml

kubectl --namespace production apply \
    --filename apps/silly-demo-db.yaml

crossplane beta trace --namespace production \
    sqlclaim silly-demo-db

cp ../crossplane/app.yaml apps/silly-demo.yaml

cat apps/silly-demo.yaml

kubectl --namespace production apply \
    --filename apps/silly-demo.yaml

crossplane beta trace --namespace production \
    appclaim silly-demo

Wait until all the resources are Available.

kubectl --namespace production get all,ingresses

The Pod STATUS is ErrImagePull because there is no image. We'll fix that later.

gh pr list

gh pr view silly-demo-ci --json files

gh pr merge silly-demo-ci --rebase

git pull

kubectl --namespace production delete \
    --filename apps/silly-demo.yaml

git add .

git commit -m "Apps"

git push

cd ..

Continue The Adventure

• Policies