Add support for Kustomize components

Fix #753

Signed-off-by: Kristian Klausen <[email protected]>

Author: klausenbusk

api/v1beta2/kustomization_types.go

@@ -153,6 +153,10 @@ type KustomizationSpec struct {
 	// +kubebuilder:validation:Enum=none;client;server
 	// +optional
 	Validation string `json:"validation,omitempty"`
+
+	// Components specifies relative paths to specifications of other Components
+	// +optional
+	Components []string `json:"components,omitempty"`
 }
 
 // Decryption defines how decryption is handled for Kubernetes manifests.

api/v1beta2/zz_generated.deepcopy.go

@@ -585,6 +585,12 @@ spec:
             description: KustomizationSpec defines the configuration to calculate
               the desired state from a Source using Kustomize.
             properties:
+              components:
+                description: Components specifies relative paths to specifications
+                  of other Components
+                items:
+                  type: string
+                type: array
               decryption:
                 description: Decrypt Kubernetes secrets before applying them on the
                   cluster.

config/crd/bases/kustomize.toolkit.fluxcd.io_kustomizations.yaml

@@ -367,6 +367,18 @@ string
 <p>Deprecated: Not used in v1beta2.</p>
 </td>
 </tr>
+<tr>
+<td>
+<code>components</code><br>
+<em>
+[]string
+</em>
+</td>
+<td>
+<em>(Optional)</em>
+<p>Components specifies relative paths to specifications of other Components</p>
+</td>
+</tr>
 </table>
 </td>
 </tr>
@@ -816,6 +828,18 @@ string
 <p>Deprecated: Not used in v1beta2.</p>
 </td>
 </tr>
+<tr>
+<td>
+<code>components</code><br>
+<em>
+[]string
+</em>
+</td>
+<td>
+<em>(Optional)</em>
+<p>Components specifies relative paths to specifications of other Components</p>
+</td>
+</tr>
 </tbody>
 </table>
 </div>

docs/api/kustomize.md

@@ -556,6 +556,7 @@ offering support for the following Kustomize directives:
 - [namespace](https://kubectl.docs.kubernetes.io/references/kustomize/kustomization/namespace/)
 - [patches](https://kubectl.docs.kubernetes.io/references/kustomize/kustomization/patches/)
 - [images](https://kubectl.docs.kubernetes.io/references/kustomize/kustomization/images/)
+- [components](https://kubectl.docs.kubernetes.io/references/kustomize/kustomization/components/)
 
 ### Target namespace
 
@@ -654,6 +655,31 @@ spec:
     digest: sha256:24a0c4b4a4c0eb97a1aabb8e29f18e917d05abfe1b7a7c07857230879ce7d3d3
 ```
 
+### Components
+
+To add [Kustomize `components` entries](https://kubectl.docs.kubernetes.io/references/kustomize/kustomization/components/)
+to the configuration, and use reusable pieces of configuration logic that can
+be included from multiple overlays, `spec.components` can be defined:
+
+```yaml
+apiVersion: kustomize.toolkit.fluxcd.io/v1beta2
+kind: Kustomization
+metadata:
+  name: podinfo
+  namespace: flux-system
+spec:
+  # ...omitted for brevity
+  components:
+  - ingress
+  - tls
+```
+
+**Note:** The component paths must be local and relative.
+
+**Warning:** Components are a alpha feature in Kustomize and are therefore
+considered experimental in Flux. No guarantees are provided and the feature may
+be modified in backwards incompatible ways or removed without warning.
+
 ## Variable substitution
 
 With `spec.postBuild.substitute` you can provide a map of key/value pairs holding the

docs/spec/v1beta2/kustomization.md

@@ -25,7 +25,7 @@ require (
 	github.com/fluxcd/pkg/apis/kustomize v0.7.0
 	github.com/fluxcd/pkg/apis/meta v0.18.0
 	github.com/fluxcd/pkg/http/fetch v0.3.0
-	github.com/fluxcd/pkg/kustomize v0.10.0
+	github.com/fluxcd/pkg/kustomize v0.11.0
 	github.com/fluxcd/pkg/runtime v0.24.0
 	github.com/fluxcd/pkg/ssa v0.22.0
 	github.com/fluxcd/pkg/tar v0.2.0

go.mod

@@ -236,8 +236,8 @@ github.com/fluxcd/pkg/apis/meta v0.18.0 h1:s0LeulWcQ4DxVX6805vgDTxlA6bAYk+Lq1QHS
 github.com/fluxcd/pkg/apis/meta v0.18.0/go.mod h1:pYvXRFi1UKNNrGR34jw3uqOnMXw9X6dTkML8j5Z7tis=
 github.com/fluxcd/pkg/http/fetch v0.3.0 h1:/mLj0IzTx+GhR09etzMJsBoNQ0qeOx9cSdeUgRB+oqM=
 github.com/fluxcd/pkg/http/fetch v0.3.0/go.mod h1:dHTDYIeL0ZAQ9mHM6ZS4VProxho+Atm73MHJ55yj0Sg=
-github.com/fluxcd/pkg/kustomize v0.10.0 h1:EG5MbYrLtxeCiZxeFUgvyBhFZaXnKfeqqpg7O+J7o3s=
-github.com/fluxcd/pkg/kustomize v0.10.0/go.mod h1:awHID4OKe2/WAfTFg4u0fURXZPUkrIslSZNSPX9MEFQ=
+github.com/fluxcd/pkg/kustomize v0.11.0 h1:zseS9LRUuzhP/7KamccmsOgYpJAdhqtsf+2wN/CHF3I=
+github.com/fluxcd/pkg/kustomize v0.11.0/go.mod h1:awHID4OKe2/WAfTFg4u0fURXZPUkrIslSZNSPX9MEFQ=
 github.com/fluxcd/pkg/runtime v0.24.0 h1:rQmm5Xq8K7f8xcPj1oNOInM1x4YwmgTucZJOP51Xmr4=
 github.com/fluxcd/pkg/runtime v0.24.0/go.mod h1:I2T+HWVNzX0cxm9TgH+SVNHTwqlmEDiSke43JXsq9iY=
 github.com/fluxcd/pkg/ssa v0.22.0 h1:HvJTuiYLZMxCjin7bAqBgnc2RjSqEfYrMbV5yINoM64=