[Video Course][George Alonge] Kustomize Mastery: Manage Kubernetes Configuration with Ease [ENG, 2023][~4h 30m]

https://github.com/galonge/udemy-kustomize-mastery

01. Welcome - Quick Start!

04. Kustomize Hands-on - Live

$ mkdir ~/projects/dev/kustomize
$ cd ~/projects/dev/kustomize

$ git clone [email protected]:galonge/udemy-kustomize-mastery.git
$ cd udemy-kustomize-mastery/code-samples/intro/wordpress-example/

$ kubectl apply -f manifests/v1/

$ kubectl get pods -w
NAME                         READY   STATUS    RESTARTS   AGE
wordpress-64f98659c5-zqcvk   1/1     Running   0          44s

$ kubectl get svc
NAME         TYPE           CLUSTER-IP      EXTERNAL-IP   PORT(S)        AGE
***
wordpress    LoadBalancer   10.100.186.38   <pending>     80:30100/TCP   28s

$ kubectl port-forward svc/wordpress --address 0.0.0.0 8080:80

http://localhost:8080/

$ kubectl delete -f manifests/v1/

$ kubectl create ns v1
$ kubectl kustomize kustomize/base/
$ kubectl apply -k kustomize/base/ -n v1

$ kubectl kustomize kustomize/v2
$ kubectl create ns v2
$ kubectl apply -k kustomize/base/ -n v2

$ kubectl kustomize kustomize/v3
$ kubectl create ns v3
$ kubectl apply -k kustomize/base/ -n v3

03. The Kustomization File

03. Transformers

$ cd ~/projects/dev/kustomize
$ cd udemy-kustomize-mastery/code-samples/3-the-kfile/wordpress/kustomize/
$ cd v1/
// $ kustomize build . > results.yaml
$ kubectl apply -k .

$ cd ~/projects/dev/kustomize
$ cd udemy-kustomize-mastery/code-samples/3-the-kfile/wordpress/kustomize/
$ cd v1/
// $ kustomize build . > results.yaml
$ kubectl apply -k .

$ kubectl get pods
NAME                           READY   STATUS    RESTARTS   AGE
v1-wordpress-df6cdb988-4mvwm   1/1     Running   0          67s

$ kubectl get svc
NAME           TYPE        CLUSTER-IP       EXTERNAL-IP   PORT(S)        AGE
kubernetes     ClusterIP   10.96.0.1        <none>        443/TCP        18h
v1-wordpress   NodePort    10.104.207.108   <none>        80:30001/TCP   95s

04. Generators

05. ConfigMap Generators

$ cd ~/projects/dev/kustomize
$ cd udemy-kustomize-mastery/code-samples/3-the-kfile/wordpress/kustomize/lec-12-configmaps/

$ kubectl create ns lec-12

$ kubectl config set-context --current --namespace=lec-12

$ kustomize build
$ kubectl kustomize .

$ kubectl apply -k .

$ kubectl get svc/lec-12-mysql --output="jsonpath={.spec.clusterIP}"

$ kubectl get pods
NAME                                READY   STATUS    RESTARTS   AGE
lec-12-mysql-6d759c4c64-v2jrm       1/1     Running   0          42s
lec-12-wordpress-555c959855-d8xpp   1/1     Running   0          9m5s

$ kubectl get cm
NAME                  DATA   AGE
kube-root-ca.crt      1      14m
lec-12-mysql-config   2      11m

Если не нужно, чтобы генерился hash

generatorOptions:
  disableNameSuffixHash: true
  labels:
    generated: 'true'

// Nginx с конфигами собираем

$ cd from-file/
$ kustomize build
$ kubectl kustomize .

$ kubectl apply -k .
$ kubectl port-forward deploy/lec-12-nginx-deployment 30002:80

// OK!
http://localhost:30002/

$ kubectl delete -k .

06. Secret Generator

$ cd ~/projects/dev/kustomize
$ cd udemy-kustomize-mastery/code-samples/3-the-kfile/wordpress/kustomize/lec-13-secrets/

$ kubectl create ns lec-13

$ kubectl config set-context --current --namespace=lec-13

$ kustomize build
$ kubectl kustomize .

$ kubectl apply -k .

$ kubectl get svc/lec-13-mysql --output="jsonpath={.spec.clusterIP}"

$ kubectl get secret

07. Resources

Продемонстрировли возможность указать путь к ресурсам на github

$ cd ../lec-14-resources/

09. Namespaces

Неймспейсы можно задавать и создавать.
Если не заданы, назначать.

$ cd ../lec-15-namespaces/

10. Labels & Annotations

$ cd ../lec-16-labels-and-annotations/

04. Working with Patches

01. Patches Overview

02. Patches - Strategic Merge

$ cd 4-patches/wordpress/kustomize/lec-18-strategic-merge
$ kustomize build .

03. Patches - JSON6902

$ cd ../lec-19-json-6902/
$ kustomize build .

05. Working with Custom Resource Definitions - CRDs

$ cd udemy-kustomize-mastery/code-samples/5-crds/wordpress/kustomize/lec-20-crds

kubectl api-resources | grep apps
controllerrevisions                            apps/v1                                true         ControllerRevision
daemonsets                        ds           apps/v1                                true         DaemonSet
deployments                       deploy       apps/v1                                true         Deployment
replicasets                       rs           apps/v1                                true         ReplicaSet
statefulsets                      sts          apps/v1                                true         StatefulSet

$ kustomize build .

06. Managing Multiple Environments with Overlays

$ cd udemy-kustomize-mastery/code-samples/6-multiple-envs/base

$ kubectl apply -k .

$ kubectl get svc,pod -o wide

$ kubectl port-forward svc/frontend-external 30219:80

// OK!
http://localhost:30219/

$ kubectl delete -k .

$ cd ../day1/dev/

$ kubectl apply -k .

$ kubectl delete -k .

$ cd ../stage/
$ kubectl apply -k .

$ kubectl delete -k .