8_tools.md

Outils

Kustomize

Inclus dans kubectl kustomize permet de patcher et personnaliser des configurations

Exemple d'usage

Install binary (si pas dispo via kubectl -k )

curl -s "https://raw.githubusercontent.com/kubernetes-sigs/kustomize/master/hack/install_kustomize.sh"  | bash

Arborescence du dossier de nos configurations

kustomize/
├── deployment.yaml
├── kustomization.yaml
└── service.yaml

Le fichier kustomization.yaml contien des libellés qu'on veut appliquer à toutes nos ressources

apiVersion: kustomize.config.k8s.io/v1beta1
kind: Kustomization

commonLabels:
  app: http-test-kustomize

resources:
  - service.yaml
  - deployment.yaml

Pour visualiser le résultat :

kustomize build kustomize

apiVersion: v1
kind: Service
metadata:
  labels:
    app: http-test-kustomize
  name: http-test-kustomize
spec:
  ports:
  - name: http
    port: 8080
  selector:
    app: http-test-kustomize
---
apiVersion: apps/v1
kind: Deployment
metadata:
  labels:
    app: http-test-kustomize
  name: http-test-kustomize
spec:
  selector:
    matchLabels:
      app: http-test-kustomize
  template:
    metadata:
      labels:
        app: http-test-kustomize
    spec:
      containers:
      - image: nginx
        name: app
        ports:
        - containerPort: 8080
          name: http
          protocol: TCP

Appliquer et générer les ressources

kubectl apply -k kustomize

Documentation Kustomize

Kubectx

Un outil pour switcher facilement entre les clusters et namespaces

Kubectx

# switch to another cluster that's in kubeconfig
$ kubectx minikube
Switched to context "minikube".

# switch back to previous cluster
$ kubectx -
Switched to context "oregon".

# create an alias for the context
$ kubectx dublin=gke_ahmetb_europe-west1-b_dublin
Context "dublin" set.
Aliased "gke_ahmetb_europe-west1-b_dublin" as "dublin".

# change the active namespace on kubectl
$ kubens kube-system
Context "test" set.
Active namespace is "kube-system".

# go back to the previous namespace
$ kubens -
Context "test" set.
Active namespace is "default".