Apply strategic merge patch

Use patchesStrategicMerge to partially override base resources

# Add patchesStrategicMerge in kustomization.yaml

More kustomize commands

Apply strategic merge patch

cat > patch.yaml <<EOF apiVersion: apps/v1 kind: Deployment metadata: name: myapp spec: replicas: 3 template: spec: containers: - name: myapp resources: limits: memory: 512Mi EOF echo 'patches:\n- path: patch.yaml' >> kustomization.yaml

Create a strategic merge patch and register it in kustomization.yaml
Inflate Helm charts in kustomize build

kustomize build --enable-helm ./overlay

Render helmCharts: block to manifests; note: needs helm in PATH
Apply a reusable component overlay

cat <<'EOF' >> kustomization.yaml components: - ../../components/monitoring EOF

Mixin reusable patches/resources via components: (Kustomize v4+)
Copy a field with replacements

cat <<'EOF' >> kustomization.yaml replacements: - source: {kind: ConfigMap, name: cfg, fieldPath: data.host} targets: - select: {kind: Deployment} fieldPaths: [spec.template.spec.containers.0.env.0.value] EOF

modern: replacements: copies a field cross-resource, replaces deprecated vars:
Inline patch with target selector

cat <<'EOF' >> kustomization.yaml patches: - target: {kind: Deployment, labelSelector: app=api} patch: |- - op: replace path: /spec/replicas value: 3 EOF

JSON6902 patch applied to all matching targets, no separate file