feat: Allow the specification of additional trust roots (#573)

* feat: Allow the specification of additional trust roots

* chore: Regenerate charts

* test: Add integration test for additionalTrustRoots

* docs: Extend CRD documentation

* docs: Document the property additionalTrustRoots

* chore: Improve log message

Co-authored-by: Natalie Klestrup Röijezon <[email protected]>

* chore: Improve code style

Co-authored-by: Natalie Klestrup Röijezon <[email protected]>

* chore: Fix compile error

* feat: Support ConfigMaps in the additionalTrustRoots property

* chore: Improve code style

* chore: Improve code style

* docs: Improve the description of additionalTrustRoots

---------

Co-authored-by: Natalie Klestrup Röijezon <[email protected]>

Author: siegfriedweber

Diff for: CHANGELOG.md

@@ -14,6 +14,7 @@ All notable changes to this project will be documented in this file.
 - Made RSA key length configurable for certificates issued by cert-manager ([#528]).
 - Kerberos principal backends now also provision principals for IP address, not just DNS hostnames ([#552]).
 - OLM deployment helper ([#546]).
+- Allow the specification of additional trust roots in autoTls SecretClasses ([#573]).
 
 ### Changed
 
@@ -38,6 +39,7 @@ All notable changes to this project will be documented in this file.
 [#566]: https://github.com/stackabletech/secret-operator/pull/566
 [#569]: https://github.com/stackabletech/secret-operator/pull/569
 [#571]: https://github.com/stackabletech/secret-operator/pull/571
+[#573]: https://github.com/stackabletech/secret-operator/pull/573
 
 ## [24.11.1] - 2025-01-10
 

Diff for: deploy/helm/secret-operator/crds/crds.yaml

@@ -42,6 +42,44 @@ spec:
 
                         A new certificate and key pair will be generated and signed for each Pod, keys or certificates are never reused.
                       properties:
+                        additionalTrustRoots:
+                          default: []
+                          description: Additional trust roots which are added to the provided `ca.crt` file.
+                          items:
+                            oneOf:
+                              - required:
+                                  - configMap
+                              - required:
+                                  - secret
+                            properties:
+                              configMap:
+                                description: 'Reference (name and namespace) to a Kubernetes ConfigMap object where additional certificates are stored. The extensions of the keys denote its contents: A key suffixed with `.crt` contains a stack of base64 encoded DER certificates, a key suffixed with `.der` contains a binary DER certificate.'
+                                properties:
+                                  name:
+                                    description: Name of the ConfigMap being referred to.
+                                    type: string
+                                  namespace:
+                                    description: Namespace of the ConfigMap being referred to.
+                                    type: string
+                                required:
+                                  - name
+                                  - namespace
+                                type: object
+                              secret:
+                                description: 'Reference (name and namespace) to a Kubernetes Secret object where additional certificates are stored. The extensions of the keys denote its contents: A key suffixed with `.crt` contains a stack of base64 encoded DER certificates, a key suffixed with `.der` contains a binary DER certificate.'
+                                properties:
+                                  name:
+                                    description: Name of the Secret being referred to.
+                                    type: string
+                                  namespace:
+                                    description: Namespace of the Secret being referred to.
+                                    type: string
+                                required:
+                                  - name
+                                  - namespace
+                                type: object
+                            type: object
+                          type: array
                         ca:
                           description: Configures the certificate authority used to issue Pod certificates.
                           properties:

Diff for: deploy/helm/secret-operator/templates/roles.yaml

@@ -69,6 +69,7 @@ rules:
   - apiGroups:
       - ""
     resources:
+      - configmaps
       - nodes
       - persistentvolumeclaims
     verbs:

Diff for: docs/modules/secret-operator/pages/secretclass.adoc

@@ -113,6 +113,10 @@ spec:
         keyGeneration:
           rsa:
             length: 4096
+      additionalTrustRoots:
+        - secret:
+            name: trust-roots
+            namespace: default
       maxCertificateLifetime: 15d # optional
 ----
 
@@ -125,6 +129,12 @@ spec:
 `autoTls.ca.keyGeneration`:: Configures how keys should be generated.
 `autoTls.ca.keyGeneration.rsa`:: Declares that keys should be generated using the RSA algorithm.
 `autoTls.ca.keyGeneration.rsa.length`:: The amount of bits used for generating the RSA key pair. Currently, `2048`, `3072` and `4096` are supported. Defaults to `2048` bits.
+`additionalTrustRoots`:: Configures additional trust roots which are added to the CA files or truststores in the provisioned volume mounts.
+`additionalTrustRoots.secret`::
+    Reference (`name` and `namespace`) to a K8s `Secret` object where the trusted certificates are stored.
+    The extension of a key defines its content:
+    * `.crt` denotes a stack of PEM (base64-encoded DER) certificates.
+    * `.der` denotes a a binary DER certificates.
 `autoTls.maxCertificateLifetime`:: Maximum lifetime the created certificates are allowed to have. In case consumers request a longer lifetime than allowed by this setting, the lifetime will be the minimum of both.
 
 [#backend-certmanager]

Diff for: rust/crd-utils/src/lib.rs

@@ -4,11 +4,47 @@ use std::fmt::Display;
 
 use serde::{Deserialize, Serialize};
 use stackable_operator::{
-    k8s_openapi::api::core::v1::Secret,
-    kube::runtime::reflector::ObjectRef,
+    k8s_openapi::api::core::v1::{ConfigMap, Secret},
+    kube::{api::DynamicObject, runtime::reflector::ObjectRef},
     schemars::{self, JsonSchema},
 };
 
+#[derive(Serialize, Deserialize, Clone, Debug, PartialEq, JsonSchema)]
+#[serde(rename_all = "camelCase")]
+pub struct ConfigMapReference {
+    /// Namespace of the ConfigMap being referred to.
+    pub namespace: String,
+    /// Name of the ConfigMap being referred to.
+    pub name: String,
+}
+
+// Use ObjectRef for logging/errors
+impl Display for ConfigMapReference {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        ObjectRef::<ConfigMap>::from(self).fmt(f)
+    }
+}
+impl From<ConfigMapReference> for ObjectRef<ConfigMap> {
+    fn from(val: ConfigMapReference) -> Self {
+        ObjectRef::<ConfigMap>::from(&val)
+    }
+}
+impl From<&ConfigMapReference> for ObjectRef<ConfigMap> {
+    fn from(val: &ConfigMapReference) -> Self {
+        ObjectRef::<ConfigMap>::new(&val.name).within(&val.namespace)
+    }
+}
+impl From<ConfigMapReference> for ObjectRef<DynamicObject> {
+    fn from(val: ConfigMapReference) -> Self {
+        ObjectRef::<ConfigMap>::from(&val).erase()
+    }
+}
+impl From<&ConfigMapReference> for ObjectRef<DynamicObject> {
+    fn from(val: &ConfigMapReference) -> Self {
+        ObjectRef::<ConfigMap>::from(val).erase()
+    }
+}
+
 // Redefine SecretReference instead of reusing k8s-openapi's, in order to make name/namespace mandatory.
 #[derive(Serialize, Deserialize, Clone, Debug, PartialEq, JsonSchema)]
 #[serde(rename_all = "camelCase")]
@@ -35,3 +71,13 @@ impl From<&SecretReference> for ObjectRef<Secret> {
         ObjectRef::<Secret>::new(&val.name).within(&val.namespace)
     }
 }
+impl From<SecretReference> for ObjectRef<DynamicObject> {
+    fn from(val: SecretReference) -> Self {
+        ObjectRef::<Secret>::from(&val).erase()
+    }
+}
+impl From<&SecretReference> for ObjectRef<DynamicObject> {
+    fn from(val: &SecretReference) -> Self {
+        ObjectRef::<Secret>::from(val).erase()
+    }
+}

Diff for: rust/operator-binary/src/backend/dynamic.rs

@@ -118,11 +118,13 @@ pub async fn from_class(
         }
         crd::SecretClassBackend::AutoTls(crd::AutoTlsBackend {
             ca,
+            additional_trust_roots,
             max_certificate_lifetime,
         }) => from(
             super::TlsGenerate::get_or_create_k8s_certificate(
                 client,
                 &ca,
+                &additional_trust_roots,
                 max_certificate_lifetime,
             )
             .await?,