feat: resourcesync status

.gitignore

@@ -1 +1,2 @@
 /target
+/.idea

Cargo.toml

@@ -13,7 +13,7 @@ clap = { version = "4.5", features = ["derive", "help", "env", "std"] }
 futures = "0.3"
 kube = { version = "0.87.2", features = ["runtime", "derive", "unstable-runtime"] }
 kube-derive = "0.87.2"
-k8s-openapi = { version = "0.20.0", features = ["v1_26"] }
+k8s-openapi = { version = "0.20.0", features = ["v1_26", "schemars"] }
 kubert = { version = "0.21.2", features = [
     "clap",
     "runtime",

manifests/crd.yml

@@ -136,10 +136,39 @@ spec:
           status:
             nullable: true
             properties:
-              demo:
-                type: string
-            required:
-            - demo
+              conditions:
+                items:
+                  description: Condition contains details for one aspect of the current state of this API Resource.
+                  properties:
+                    lastTransitionTime:
+                      description: lastTransitionTime is the last time the condition transitioned from one status to another. This should be when the underlying condition changed.  If that is not known, then using the time when the API field changed is acceptable.
+                      format: date-time
+                      type: string
+                    message:
+                      description: message is a human readable message indicating details about the transition. This may be an empty string.
+                      type: string
+                    observedGeneration:
+                      description: observedGeneration represents the .metadata.generation that the condition was set based upon. For instance, if .metadata.generation is currently 12, but the .status.conditions[x].observedGeneration is 9, the condition is out of date with respect to the current state of the instance.
+                      format: int64
+                      type: integer
+                    reason:
+                      description: reason contains a programmatic identifier indicating the reason for the condition's last transition. Producers of specific condition types may define expected values and meanings for this field, and whether the values are considered a guaranteed API. The value should be a CamelCase string. This field may not be empty.
+                      type: string
+                    status:
+                      description: status of the condition, one of True, False, Unknown.
+                      type: string
+                    type:
+                      description: type of condition in CamelCase or in foo.example.com/CamelCase.
+                      type: string
+                  required:
+                  - lastTransitionTime
+                  - message
+                  - reason
+                  - status
+                  - type
+                  type: object
+                nullable: true
+                type: array
             type: object
         required:
         - spec

src/controller.rs

@@ -1,7 +1,6 @@
-use std::{sync::Arc, time::Duration};
-
 use futures::StreamExt;
-use k8s_openapi::apimachinery::pkg::apis::meta::v1::OwnerReference;
+use k8s_openapi::apimachinery::pkg::apis::meta::v1::{Condition, OwnerReference, Time};
+use k8s_openapi::chrono::Utc;
 use kube::api::DeleteParams;
 use kube::api::Patch::Merge;
 use kube::runtime::{predicates, reflector, WatchStreamExt};
@@ -14,6 +13,8 @@ use kube::{
     Api, Client, Resource, ResourceExt,
 };
 use serde_json::json;
+use std::string::ToString;
+use std::{sync::Arc, time::Duration};
 #[allow(unused_imports)]
 use tracing::{debug, error, info, warn};
 
@@ -22,18 +23,27 @@ use util::{WithItemAdded, WithItemRemoved};
 use crate::mapping::{apply_mappings, clone_resource};
 use crate::remote_watcher_manager::RemoteWatcherManager;
 use crate::resource_extensions::NamespacedApi;
+use crate::resources::ResourceSyncStatus;
 use crate::{requeue_after, resources::ResourceSync, util, Error, Result, FINALIZER};
 
+static RESOURCE_SYNC_FAILING_CONDITION: &str = "ResourceSyncFailing";
+
 pub struct Context {
     pub client: Client,
     pub remote_watcher_manager: RemoteWatcherManager,
 }
 
+macro_rules! apply_patch_params {
+    () => {
+        PatchParams::apply(&ResourceSync::group(&())).force()
+    };
+}
+
 async fn reconcile_deleted_resource(
     resource_sync: Arc<ResourceSync>,
     name: &str,
     target_api: NamespacedApi,
-    parent_api: Api<ResourceSync>,
+    parent_api: &Api<ResourceSync>,
     ctx: Arc<Context>,
 ) -> Result<Action> {
     if !resource_sync.has_target_finalizer() {
@@ -88,7 +98,7 @@ async fn reconcile_deleted_resource(
 async fn add_target_finalizer(
     resource_sync: Arc<ResourceSync>,
     name: &str,
-    parent_api: Api<ResourceSync>,
+    parent_api: &Api<ResourceSync>,
 ) -> Result<Action> {
     let patched_finalizers = resource_sync
         .finalizers_clone_or_empty()
@@ -161,7 +171,7 @@ async fn reconcile_normally(
 
     debug!(?target, "produced target object");
 
-    let ssapply = PatchParams::apply(&ResourceSync::group(&())).force();
+    let ssapply = apply_patch_params!();
     target_api
         .patch(&target_ref.name, &ssapply, &Patch::Apply(&target))
         .await?;
@@ -185,31 +195,85 @@ async fn reconcile(resource_sync: Arc<ResourceSync>, ctx: Arc<Context>) -> Resul
         .name
         .to_owned()
         .ok_or(Error::NameRequired)?;
-    info!(?name, "running reconciler");
+    let parent_api = resource_sync.api(ctx.client.clone());
 
-    debug!(?resource_sync.spec, "got");
-    let local_ns = resource_sync.namespace().ok_or(Error::NamespaceRequired)?;
+    let result = {
+        let resource_sync = Arc::clone(&resource_sync);
 
-    let target_api = resource_sync
-        .spec
-        .target
-        .api_for(ctx.client.clone(), &local_ns)
-        .await?;
-    let source_api = resource_sync
-        .spec
-        .source
-        .api_for(ctx.client.clone(), &local_ns)
-        .await?;
-    let parent_api = resource_sync.api(ctx.client.clone());
+        info!(?name, "running reconciler");
 
-    match resource_sync {
-        resource_sync if resource_sync.has_been_deleted() => {
-            reconcile_deleted_resource(resource_sync, &name, target_api, parent_api, ctx).await
+        debug!(?resource_sync.spec, "got");
+        let local_ns = resource_sync.namespace().ok_or(Error::NamespaceRequired)?;
+
+        let target_api = resource_sync
+            .spec
+            .target
+            .api_for(ctx.client.clone(), &local_ns)
+            .await?;
+        let source_api = resource_sync
+            .spec
+            .source
+            .api_for(ctx.client.clone(), &local_ns)
+            .await?;
+
+        match resource_sync {
+            resource_sync if resource_sync.has_been_deleted() => {
+                reconcile_deleted_resource(resource_sync, &name, target_api, &parent_api, ctx).await
+            }
+            resource_sync if !resource_sync.has_target_finalizer() => {
+                add_target_finalizer(resource_sync, &name, &parent_api).await
+            }
+            _ => reconcile_normally(resource_sync, &name, source_api, target_api, ctx).await,
         }
-        resource_sync if !resource_sync.has_target_finalizer() => {
-            add_target_finalizer(resource_sync, &name, parent_api).await
+    };
+
+    let status = match &result {
+        Err(err) => {
+            let sync_failing_condition = Condition {
+                last_transition_time: sync_failing_transition_time(&(resource_sync.status)),
+                message: err.to_string(),
+                observed_generation: resource_sync.metadata.generation,
+                reason: RESOURCE_SYNC_FAILING_CONDITION.to_string(),
+                status: "True".to_string(),
+                type_: RESOURCE_SYNC_FAILING_CONDITION.to_string(),
+            };
+
+            Some(ResourceSyncStatus {
+                conditions: Some(vec![sync_failing_condition]),
+            })
         }
-        _ => reconcile_normally(resource_sync, &name, source_api, target_api, ctx).await,
+        _ => None,
+    };
+
+    if status != resource_sync.status {
+        parent_api
+            .patch_status(
+                &name,
+                &PatchParams::default(),
+                &Merge(json!({"status": status})),
+            )
+            .await?;
+    }
+
+    result
+}
+
+fn sync_failing_transition_time(status: &Option<ResourceSyncStatus>) -> Time {
+    let now = Time(Utc::now());
+
+    match status {
+        None => now,
+        Some(status) => match &status.conditions {
+            None => now,
+            Some(conditions) => {
+                let sync_failing_condition = conditions
+                    .iter()
+                    .find(|c| c.type_ == RESOURCE_SYNC_FAILING_CONDITION);
+                sync_failing_condition
+                    .map(|c| c.last_transition_time.clone())
+                    .unwrap_or(now)
+            }
+        },
     }
 }
 
@@ -257,4 +321,49 @@ pub async fn run(client: Client) -> Result<()> {
 }
 
 #[cfg(test)]
-mod tests {}
+mod tests {
+    use super::{sync_failing_transition_time, RESOURCE_SYNC_FAILING_CONDITION};
+    use crate::resources::ResourceSyncStatus;
+    use chrono::{TimeDelta, TimeZone};
+    use k8s_openapi::apimachinery::pkg::apis::meta::v1::Condition;
+    use k8s_openapi::apimachinery::pkg::apis::meta::v1::Time;
+    use once_cell::sync::Lazy;
+    use rstest::rstest;
+
+    static NOW: Lazy<Time> = Lazy::new(|| Time(chrono::Utc::now()));
+    static EPOCH: Lazy<Time> = Lazy::new(|| Time(chrono::Utc.timestamp_opt(0, 0).unwrap()));
+
+    #[rstest]
+    #[case::none(None, &NOW)]
+    #[case::no_conditions(Some(ResourceSyncStatus::default()), &NOW)]
+    #[case::empty_conditions(Some(ResourceSyncStatus{conditions: Some(vec![])}), &NOW)]
+    #[case::condition_already_present(
+        Some(
+            ResourceSyncStatus{
+                conditions: Some(
+                    vec![
+                        Condition{
+                            last_transition_time: EPOCH.clone(),
+                            type_: RESOURCE_SYNC_FAILING_CONDITION.to_string(),
+                            message: "".to_string(),
+                            reason: "".to_string(),
+                            observed_generation: None,
+                            status: "".to_string()
+                        }
+                    ]
+                )
+            }
+        ),
+        &NOW
+    )]
+    #[tokio::test]
+    async fn test_sync_failing_transition_time(
+        #[case] status: Option<ResourceSyncStatus>,
+        #[case] expected: &Time,
+    ) {
+        let result = sync_failing_transition_time(&status);
+        let diff = result.0 - expected.0;
+
+        assert!(diff.le(&TimeDelta::minutes(1)))
+    }
+}

src/resources.rs

@@ -1,6 +1,7 @@
 use k8s_openapi::apiextensions_apiserver::pkg::apis::apiextensions::v1::{
     CustomResourceDefinition, CustomResourceValidation, JSONSchemaProps,
 };
+use k8s_openapi::apimachinery::pkg::apis::meta::v1::Condition;
 use kube::{
     core::{gvk::ParseGroupVersionError, GroupVersionKind, TypeMeta},
     CustomResource,
@@ -33,10 +34,10 @@ pub struct Mapping {
     pub to_field_path: Option<String>,
 }
 
-#[derive(Deserialize, Serialize, Clone, Debug, Default, JsonSchema)]
+#[derive(Deserialize, Serialize, Clone, Debug, Default, JsonSchema, PartialEq)]
 #[serde(rename_all = "camelCase")]
 pub struct ResourceSyncStatus {
-    pub demo: String,
+    pub conditions: Option<Vec<Condition>>,
 }
 
 #[derive(Deserialize, Serialize, Clone, Debug, Default, JsonSchema, Hash, PartialEq, Eq)]