wip: created basic struct for separation natsjetstream config from nats

adr/019-Nats-credentials-management.md

@@ -0,0 +1,86 @@
+Initial Date: 2025-02-06
+
+## Status
+
+Proposed
+
+## Context 
+
+The Harmony Agent requires a persistent connection to the NATS Supercluster to perform Key-Value (KV) operations (Read/Write/Watch).
+
+Service Requirements: The agent must authenticate with sufficient privileges to manage KV buckets and interact with the JetStream API.
+
+Infrastructure: NATS is deployed as a multi-site Supercluster. Authentication must be consistent across sites to allow for agent failover and data replication.
+
+https://docs.nats.io/running-a-nats-service/configuration/securing_nats/auth_intro
+
+Technical Constraint: In NATS, JetStream functionality is not global by default; it must be explicitly enabled and capped at the Account level to allow KV bucket creation and persistence.
+
+## Issues
+
+1. The "System Account" Trap
+
+    The Hole: Using the system account for the Harmony Agent.
+
+    The Risk: The NATS System Account is for server heartbeat and monitoring. It cannot (and should not) own JetStream KV buckets.
+
+2. Multi-Site Authorization Sync
+
+    The Hole: Defining users in local nats.conf files via Helm.
+
+    The Risk: If an agent at Site-2 fails over to Site-3, but Site-3’s local configuration doesn't have the testUser credentials, the agent will be locked out during an outage.
+
+3. KV Replication Factor
+
+    The Hole: Not specifying the Replicas count for the KV bucket.
+
+    The Risk: If you create a KV bucket with the default (1 replica), it only exists at the site where it was created. If that site goes down, the data is lost despite having a Supercluster.
+
+4. Subject-Level Permissions
+
+    The Hole: Only granting TEST.* permissions.
+
+    The Risk: NATS KV uses internal subjects (e.g., $KV.<bucket_name>.>). Without access to these, the agent will get an "Authorization Violation" even if it's logged in.
+
+
+## Proposed Solution
+
+To enable reliable, secure communication between the Harmony Agent and the NATS Supercluster, we will implement Account-isolated JetStream using NKey Authentication (or mTLS).
+1. Dedicated Account Architecture
+
+We will move away from the "Global/Default" account. A dedicated HARMONY account will be defined identically across all sites in the Supercluster. This ensures that the metadata for the KV bucket can replicate across the gateways.
+
+    System Account: Reserved for NATS internal health and Supercluster routing.
+
+    Harmony Account: Dedicated to Harmony Agent data, with JetStream explicitly enabled.
+
+2. Authentication: Use harmony secret store mounted into nats container
+
+    Take advantage of currently implemented solution
+
+3. JetStream & KV Configuration
+
+To ensure the KV bucket is available across the Supercluster, the following configuration must be applied:
+
+    Replication Factor (R=3): KV buckets will be created with a replication factor of 3 to ensure data persists across Site-1, Site-2, and Site-3.
+
+    Permissions: The agent will be granted scoped access to:
+
+        $KV.HARMONY.> (Data operations)
+
+        $JS.API.CONSUMER.> and $JS.API.STREAM.> (Management operations)
+
+## Consequence of Decision
+Pros
+
+    Resilience: Agents can fail over to any site in the Supercluster and find their credentials and data.
+
+    Security: By using a dedicated account, the Harmony Agent cannot see or interfere with NATS system traffic.
+
+    Scalability: We can add Site-4 or Site-5 simply by copying the HARMONY account definition.
+
+Cons / Risks
+
+    Configuration Drift: If one site's ConfigMap is updated without the others, authentication will fail during a site failover.
+
+    Complexity: Requires a "Management" step to ensure the account exists on all NATS instances before the agent attempts to connect.

harmony/src/domain/topology/k8s_anywhere/k8s_anywhere.rs

@@ -151,7 +151,14 @@ impl TlsRouter for K8sAnywhereTopology {
                 }
             }
             KubernetesDistribution::K3sFamily => todo!(),
-            KubernetesDistribution::Default => todo!(),
+            KubernetesDistribution::Default => {
+                warn!(
+                    "unimpleneted see example https://kubernetes.github.io/ingress-nginx/user-guide/cli-arguments/ and create ingress manually "
+                );
+                Ok(Some(
+                    "This section is in todo and must be created manually".to_string(),
+                ))
+            }
         }
     }
 

harmony/src/domain/topology/k8s_anywhere/nats.rs

@@ -3,8 +3,9 @@ use async_trait::async_trait;
 use crate::{
     inventory::Inventory,
     modules::nats::{
-        capability::{Nats, NatsCluster},
-        score_nats_k8s::NatsK8sScore,
+        capability::{
+            JetstreamConfig, JetstreamUserConfig, Nats, NatsCluster, NatsCredentials, NatsJetstream,
+        }, score_nats_enable_jetstream::NatsK8sEnableJetstreamScore, score_nats_jetstream::NatsK8sJetstreamScore, score_nats_jetstream_credentials::NatsK8sJetstreamCredentialsScore, score_nats_k8s::NatsK8sScore
     },
     score::Score,
     topology::K8sAnywhereTopology,
@@ -36,3 +37,31 @@ impl Nats for K8sAnywhereTopology {
         ))
     }
 }
+
+#[async_trait]
+impl NatsJetstream for K8sAnywhereTopology {
+    async fn enable_jetstream(&self, jetstream_config: &JetstreamConfig) -> Result<String, String> {
+        NatsK8sEnableJetstreamScore {}
+            .interpret(&Inventory::empty(), self)
+            .await
+            .map_err(|e| format!("Failed to enable jetstream: {}", e))?;
+
+        Ok("Nats jetstream enabled".to_string())
+    }
+
+    async fn create_jetstream_credentials(
+        &self,
+        jetstream_user_config: &JetstreamUserConfig,
+    ) -> Result<String, String> {
+        NatsK8sJetstreamCredentialsScore {}
+            .interpret(&Inventory::empty(), self)
+            .await
+            .map_err(|e| format!("Failed to create credentials jetstream: {}", e))?;
+
+        Ok("Nats jetstream user credentials configured".to_string())
+    }
+
+    async fn get_jetstream_credentials(&self) -> Result<NatsCredentials, String> {
+        todo!()
+    }
+}

harmony/src/modules/nats/capability.rs

@@ -1,7 +1,9 @@
 use std::fmt::Display;
 
 use async_trait::async_trait;
-use serde::Serialize;
+use harmony_secret::Secret;
+use schemars::JsonSchema;
+use serde::{Deserialize, Serialize};
 
 #[async_trait]
 pub trait Nats {
@@ -13,6 +15,19 @@ pub trait Nats {
     ) -> Result<String, String>;
 }
 
+//ADR nats credentials management ->
+#[async_trait]
+pub trait NatsJetstream: Nats {
+    async fn enable_jetstream(&self, jetstream_config: &JetstreamConfig) -> Result<String, String>;
+
+    async fn create_jetstream_credentials(
+        &self,
+        jetstream_user_config: &JetstreamUserConfig,
+    ) -> Result<String, String>;
+
+    async fn get_jetstream_credentials(&self) -> Result<NatsCredentials, String>;
+}
+
 #[async_trait]
 pub trait NatsSupercluster {
     async fn deploy_site(
@@ -51,3 +66,26 @@ impl Display for NatsEndpoint {
         write!(f, "({})", self.host,)
     }
 }
+
+#[derive(Debug, Clone, Serialize)]
+pub struct JetstreamConfig {
+    store_dir: String,
+    max_memory_store: u8,
+    max_file_store: u8,
+    domain: String,
+    max_buffered_msgs: u8,
+    max_buffered_size: u8,
+    request_qeue_limit: u8,
+    sync_interval: u8,
+    strict: bool,
+    unique_tag: String,
+}
+
+#[derive(Debug, Clone, Serialize)]
+pub struct JetstreamUserConfig {}
+
+#[derive(Secret, Serialize, Deserialize, JsonSchema, Debug, PartialEq, Clone)]
+pub struct NatsCredentials {
+    pub user: String,
+    pub password: String,
+}

harmony/src/modules/nats/mod.rs

@@ -3,3 +3,6 @@ pub mod decentralized;
 pub mod pki;
 pub mod score_nats_k8s;
 pub mod score_nats_supercluster;
+pub mod score_nats_jetstream;
+pub mod score_nats_jetstream_credentials;
+pub mod score_nats_enable_jetstream;

harmony/src/modules/nats/pki.rs

@@ -63,7 +63,7 @@ where
                 ca_issuer_name.into(),
                 None,
                 Some(vec![cluster.dns_name.clone()]),
-                Some(false),
+                Some(true),
                 &root_ca_config,
             )
             .await

harmony/src/modules/nats/score_nats_enable_jetstream.rs

@@ -0,0 +1,55 @@
+use async_trait::async_trait;
+use harmony_types::id::Id;
+use serde::Serialize;
+
+use crate::{
+    data::Version,
+    interpret::{Interpret, InterpretError, InterpretName, InterpretStatus, Outcome},
+    inventory::Inventory,
+    modules::nats::capability::NatsJetstream,
+    score::Score,
+    topology::Topology,
+};
+
+#[derive(Debug, Clone, Serialize)]
+pub struct NatsK8sEnableJetstreamScore {}
+
+impl<T: Topology > Score<T> for NatsK8sEnableJetstreamScore {
+    fn name(&self) -> String {
+        "NatsK8sEnableJetstreamScore".to_string()
+    }
+
+    fn create_interpret(&self) -> Box<dyn Interpret<T>> {
+        Box::new(NatsK8sEnableJetstreamInterpet {})
+    }
+}
+
+#[derive(Debug)]
+pub struct NatsK8sEnableJetstreamInterpet {}
+
+#[async_trait]
+impl<T: Topology> Interpret<T> for NatsK8sEnableJetstreamInterpet {
+    async fn execute(
+        &self,
+        inventory: &Inventory,
+        topology: &T,
+    ) -> Result<Outcome, InterpretError> {
+        todo!()
+    }
+
+    fn get_name(&self) -> InterpretName {
+        InterpretName::Custom("NatsK8sEnableJetstreamInterpet")
+    }
+
+    fn get_version(&self) -> Version {
+        todo!()
+    }
+
+    fn get_status(&self) -> InterpretStatus {
+        todo!()
+    }
+
+    fn get_children(&self) -> Vec<Id> {
+        todo!()
+    }
+}

harmony/src/modules/nats/score_nats_jetstream.rs

@@ -0,0 +1,69 @@
+use async_trait::async_trait;
+use harmony_types::id::Id;
+use log::info;
+use serde::Serialize;
+
+use crate::{
+    data::Version,
+    interpret::{Interpret, InterpretError, InterpretName, InterpretStatus, Outcome},
+    inventory::Inventory,
+    modules::nats::capability::{JetstreamConfig, JetstreamUserConfig, NatsJetstream},
+    score::Score,
+    topology::Topology,
+};
+
+#[derive(Debug, Clone, Serialize)]
+pub struct NatsK8sJetstreamScore {
+    jetstream_config: JetstreamConfig,
+    jetstream_user_config: JetstreamUserConfig,
+}
+
+impl<T: Topology + NatsJetstream> Score<T> for NatsK8sJetstreamScore {
+    fn name(&self) -> String {
+        "NatsK8sJetstreamScore".to_string()
+    }
+
+    fn create_interpret(&self) -> Box<dyn Interpret<T>> {
+        Box::new(NatsK8sJetstreamInterpet {
+            score: self.clone(),
+        })
+    }
+}
+
+#[derive(Debug)]
+pub struct NatsK8sJetstreamInterpet {
+    score: NatsK8sJetstreamScore,
+}
+
+#[async_trait]
+impl<T: Topology + NatsJetstream> Interpret<T> for NatsK8sJetstreamInterpet {
+    async fn execute(
+        &self,
+        _inventory: &Inventory,
+        topology: &T,
+    ) -> Result<Outcome, InterpretError> {
+        info!("enabling jetstream for nats cluster");
+        topology.enable_jetstream(&self.score.jetstream_config).await?;
+        info!("creating jetstream user credentials");
+        topology.create_jetstream_credentials(&self.score.jetstream_user_config).await?;
+        Ok(Outcome::success(
+            "Successfully enabled jetstream and created user credentials".to_string(),
+        ))
+    }
+
+    fn get_name(&self) -> InterpretName {
+        InterpretName::Custom("NatsK8sJetstreamInterpret")
+    }
+
+    fn get_version(&self) -> Version {
+        todo!()
+    }
+
+    fn get_status(&self) -> InterpretStatus {
+        todo!()
+    }
+
+    fn get_children(&self) -> Vec<Id> {
+        todo!()
+    }
+}

harmony/src/modules/nats/score_nats_jetstream_credentials.rs

@@ -0,0 +1,54 @@
+use async_trait::async_trait;
+use harmony_types::id::Id;
+use serde::Serialize;
+
+use crate::{
+    data::Version,
+    interpret::{Interpret, InterpretError, InterpretName, InterpretStatus, Outcome},
+    inventory::Inventory,
+    score::Score,
+    topology::Topology,
+};
+
+#[derive(Debug, Clone, Serialize)]
+pub struct NatsK8sJetstreamCredentialsScore {}
+
+impl<T: Topology> Score<T> for NatsK8sJetstreamCredentialsScore {
+    fn name(&self) -> String {
+        "NatsK8sJetstreamCredentialsScore".to_string()
+    }
+
+    fn create_interpret(&self) -> Box<dyn Interpret<T>> {
+        Box::new(NatsK8sJetstreamCredentialsInterpret {})
+    }
+}
+
+#[derive(Debug, Clone, Serialize)]
+pub struct NatsK8sJetstreamCredentialsInterpret {}
+
+#[async_trait]
+impl<T: Topology> Interpret<T> for NatsK8sJetstreamCredentialsInterpret {
+    async fn execute(
+        &self,
+        inventory: &Inventory,
+        topology: &T,
+    ) -> Result<Outcome, InterpretError> {
+        todo!()
+    }
+
+    fn get_name(&self) -> InterpretName {
+        InterpretName::Custom("NatsK8sJetstreamCredentialsInterpret")
+    }
+
+    fn get_version(&self) -> Version {
+        todo!()
+    }
+
+    fn get_status(&self) -> InterpretStatus {
+        todo!()
+    }
+
+    fn get_children(&self) -> Vec<Id> {
+        todo!()
+    }
+}

harmony/src/modules/nats/score_nats_k8s.rs

@@ -6,7 +6,7 @@ use harmony_secret::{Secret, SecretManager};
 use harmony_types::id::Id;
 use k8s_openapi::{ByteString, api::core::v1::Secret as K8sSecret};
 use kube::api::ObjectMeta;
-use log::{debug, info};
+use log::{debug, info, warn};
 use non_blank_string_rs::NonBlankString;
 use schemars::JsonSchema;
 use serde::{Deserialize, Serialize};
@@ -18,7 +18,7 @@ use crate::{
     modules::{
         helm::chart::{HelmChartScore, HelmRepository},
         k8s::{ingress::K8sIngressScore, resource::K8sResourceScore},
-        nats::capability::{Nats, NatsCluster, NatsEndpoint},
+        nats::capability::{Nats, NatsCluster, NatsCredentials, NatsEndpoint},
         okd::{
             crd::route::{RoutePort, RouteSpec, RouteTargetReference, TLSConfig},
             route::OKDRouteScore,
@@ -36,7 +36,7 @@ pub struct NatsK8sScore {
     pub ca_bundle: Option<Vec<String>>,
 }
 
-impl<T: Topology + HelmCommand + Nats + K8sclient + TlsRouter + 'static> Score<T> for NatsK8sScore {
+impl<T: Topology + HelmCommand + K8sclient + TlsRouter + 'static> Score<T> for NatsK8sScore {
     fn name(&self) -> String {
         "NatsK8sScore".to_string()
     }
@@ -53,7 +53,7 @@ pub struct NatsK8sInterpret {
 }
 
 #[async_trait]
-impl<T: Topology + HelmCommand + Nats + K8sclient + TlsRouter + 'static> Interpret<T>
+impl<T: Topology + HelmCommand + K8sclient + TlsRouter + 'static> Interpret<T>
     for NatsK8sInterpret
 {
     async fn execute(
@@ -153,19 +153,25 @@ impl NatsK8sInterpret {
                 .await
             }
             KubernetesDistribution::K3sFamily | KubernetesDistribution::Default => {
+                warn!("
+https://kubernetes.github.io/ingress-nginx/user-guide/tls/#ssl-passthrough
+      for now tls router s not impleneted for a standard kubernetes cluster. an ingress must be manually created with the annotation 
+      nginx.ingress.kubernetes.io/ssl-passthrough: \"true\"
+                    ");
+                Ok(Outcome::noop("noop".to_string()))
                 //TODO untested
-                K8sIngressScore {
-                    name: todo!(),
-                    host: todo!(),
-                    backend_service: todo!(),
-                    port: todo!(),
-                    path: todo!(),
-                    path_type: todo!(),
-                    namespace: todo!(),
-                    ingress_class_name: todo!(),
-                }
-                .interpret(inventory, topology)
-                .await
+                // K8sIngressScore {
+                //     name: todo!(),
+                //     host: todo!(),
+                //     backend_service: todo!(),
+                //     port: todo!(),
+                //     path: todo!(),
+                //     path_type: todo!(),
+                //     namespace: todo!(),
+                //     ingress_class_name: todo!(),
+                // }
+                // .interpret(inventory, topology)
+                // .await
             }
         }
     }
@@ -221,7 +227,7 @@ impl NatsK8sInterpret {
         namespace: String,
     ) -> Result<Outcome, InterpretError> {
         let mut gateway_gateways = String::new();
-        let admin = SecretManager::get_or_prompt::<NatsAdmin>().await.unwrap();
+        let admin = SecretManager::get_or_prompt::<NatsCredentials>().await.unwrap();
         let user = admin.user.clone();
         let password = admin.password.clone();
 
@@ -304,6 +310,7 @@ service:
   ports:
     gateway:
       enabled: true
+  publishNotReadyAddresses: true
 tlsCA:
     enabled: true
     secretName: {supercluster_ca_secret_name}
@@ -343,8 +350,3 @@ natsBox:
     }
 }
 
-#[derive(Secret, Serialize, Deserialize, JsonSchema, Debug, PartialEq, Clone)]
-struct NatsAdmin {
-    user: String,
-    password: String,
-}