OSSM-3067 [DOC] Update security for jwksResolverCA

Author: gwynnemonahan

modules/ossm-configuring-jwks-resolver-ca.adoc

@@ -0,0 +1,53 @@
+// Module included in the following assemblies:
+//
+// * service_mesh/v2x/ossm-security.adoc
+
+:_mod-docs-content-type: PROCEDURE
+[id="ossm-configuring-jwks-resolver-ca_{context}"]
+= Configuring JSON Web Key Sets resolver certificate authority
+
+You can configure your own JSON Web Key Sets (JWKS) resolver certificate authority (CA) from the `ServiceMeshControlPlane` (SMCP) spec.
+
+.Procedure
+
+. Edit the `ServiceMeshControlPlane` spec file:
++
+[source, yaml]
+----
+$ oc edit smcp <smcp-name>
+----
+
+. Enable `mtls` for the data plane by setting the value of the `mtls` field to `true` in the `ServiceMeshControlPlane` spec, as shown in the following example:
++
+[source,yaml]
+----
+spec:
+  security:
+    dataPlane:
+        mtls: true # enable mtls for data plane
+    # JWKSResolver extra CA
+    # PEM-encoded certificate content to trust an additional CA
+    jwksResolverCA: |
+        -----BEGIN CERTIFICATE-----
+        [...]
+        [...]
+        -----END CERTIFICATE-----
+...
+----
+
+. Save the changes. {product-title} automatically applies them.
+
+A `ConfigMap` such as `pilot-jwks-cacerts-<SMCP name>` is created with the CA `.pem data`.
+
+.Example ConfigMap `pilot-jwks-cacerts-<SMCP name>`
+[source, yaml]
+----
+kind: ConfigMap
+apiVersion: v1
+data:
+  extra.pem: |
+      -----BEGIN CERTIFICATE-----
+      [...]
+      [...]
+      -----END CERTIFICATE-----
+----

service_mesh/v2x/ossm-security.adoc

@@ -30,6 +30,8 @@ include::modules/ossm-security-auth-policy.adoc[leveloffset=+1]
 
 include::modules/ossm-security-cipher.adoc[leveloffset=+1]
 
+include::modules/ossm-configuring-jwks-resolver-ca.adoc[leveloffset=+1]
+
 include::modules/ossm-security-cert-manage.adoc[leveloffset=+1]
 
 include::modules/ossm-cert-manage-add-cert-key.adoc[leveloffset=+1]