feat: Add conversion webhook

Author: Techassi

Cargo.lock

@@ -11,7 +11,7 @@ repository = "https://github.com/stackabletech/hive-operator"
 
 [workspace.dependencies]
 product-config = { git = "https://github.com/stackabletech/product-config.git", tag = "0.8.0" }
-stackable-operator = { git = "https://github.com/stackabletech/operator-rs.git", tag = "stackable-operator-0.105.0", features = ["telemetry", "versioned"] }
+stackable-operator = { git = "https://github.com/stackabletech/operator-rs.git", tag = "stackable-operator-0.105.0", features = ["telemetry", "versioned", "webhook"] }
 
 anyhow = "1.0"
 built = { version = "0.8", features = ["chrono", "git2"] }

Cargo.nix

@@ -39,6 +39,7 @@ use crate::{crd::affinity::get_affinity, listener::metastore_default_listener_cl
 pub mod affinity;
 pub mod security;
 
+pub const FIELD_MANAGER: &str = "hive-operator";
 pub const APP_NAME: &str = "hive";
 
 // Directories

Cargo.toml

@@ -2,21 +2,11 @@
 // This will need changes in our and upstream error types.
 #![allow(clippy::result_large_err)]
 
-mod command;
-mod config;
-mod controller;
-mod crd;
-mod discovery;
-mod kerberos;
-mod listener;
-mod operations;
-mod product_logging;
-mod service;
-
 use std::sync::Arc;
 
+use anyhow::anyhow;
 use clap::Parser;
-use futures::{FutureExt, StreamExt};
+use futures::{FutureExt, StreamExt, TryFutureExt};
 use stackable_operator::{
     YamlSchema,
     cli::{Command, RunArguments},
@@ -44,8 +34,21 @@ use stackable_operator::{
 use crate::{
     controller::HIVE_FULL_CONTROLLER_NAME,
     crd::{HiveCluster, HiveClusterVersion, v1alpha1},
+    webhooks::conversion::create_webhook_server,
 };
 
+mod command;
+mod config;
+mod controller;
+mod crd;
+mod discovery;
+mod kerberos;
+mod listener;
+mod operations;
+mod product_logging;
+mod service;
+mod webhooks;
+
 mod built_info {
     include!(concat!(env!("OUT_DIR"), "/built.rs"));
 }
@@ -66,7 +69,7 @@ async fn main() -> anyhow::Result<()> {
         Command::Crd => HiveCluster::merged_crd(HiveClusterVersion::V1Alpha1)?
             .print_yaml_schema(built_info::PKG_VERSION, SerializeOptions::default())?,
         Command::Run(RunArguments {
-            operator_environment: _,
+            operator_environment,
             watch_namespace,
             product_config,
             maintenance,
@@ -98,16 +101,28 @@ async fn main() -> anyhow::Result<()> {
                     .run(sigterm_watcher.handle())
                     .map(anyhow::Ok);
 
-            let product_config = product_config.load(&[
-                "deploy/config-spec/properties.yaml",
-                "/etc/stackable/hive-operator/config-spec/properties.yaml",
-            ])?;
-
             let client = stackable_operator::client::initialize_operator(
                 Some(OPERATOR_NAME.to_string()),
                 &common.cluster_info,
             )
             .await?;
+
+            let webhook_server = create_webhook_server(
+                &operator_environment,
+                maintenance.disable_crd_maintenance,
+                client.as_kube_client(),
+            )
+            .await?;
+
+            let webhook_server = webhook_server
+                .run(sigterm_watcher.handle())
+                .map_err(|err| anyhow!(err).context("failed to run webhook server"));
+
+            let product_config = product_config.load(&[
+                "deploy/config-spec/properties.yaml",
+                "/etc/stackable/hive-operator/config-spec/properties.yaml",
+            ])?;
+
             let event_recorder = Arc::new(Recorder::new(
                 client.as_kube_client(),
                 Reporter {
@@ -173,7 +188,7 @@ async fn main() -> anyhow::Result<()> {
                 )
                 .map(anyhow::Ok);
 
-            futures::try_join!(hive_controller, eos_checker)?;
+            futures::try_join!(hive_controller, eos_checker, webhook_server)?;
         }
     }
 

crate-hashes.json

@@ -0,0 +1,52 @@
+use snafu::{ResultExt, Snafu};
+use stackable_operator::{
+    cli::OperatorEnvironmentOptions,
+    kube::{Client, core::crd::MergeError},
+    webhook::{
+        WebhookServer, WebhookServerError, WebhookServerOptions,
+        webhooks::{ConversionWebhook, ConversionWebhookOptions},
+    },
+};
+
+use crate::crd::{FIELD_MANAGER, HiveCluster, HiveClusterVersion};
+
+/// Contains errors which can be encountered when creating the conversion webhook server and the
+/// CRD maintainer.
+#[derive(Debug, Snafu)]
+pub enum Error {
+    #[snafu(display("failed to merge CRD"))]
+    MergeCrd { source: MergeError },
+
+    #[snafu(display("failed to create conversion webhook server"))]
+    CreateWebhook { source: WebhookServerError },
+}
+
+/// Creates and returns a [`WebhookServer`].
+pub async fn create_webhook_server(
+    operator_environment: &OperatorEnvironmentOptions,
+    disable_crd_maintenance: bool,
+    client: Client,
+) -> Result<WebhookServer, Error> {
+    let crds_and_handlers = vec![(
+        HiveCluster::merged_crd(HiveClusterVersion::V1Alpha1).context(MergeCrdSnafu)?,
+        HiveCluster::try_convert,
+    )];
+
+    let conversion_webhook_options = ConversionWebhookOptions {
+        disable_crd_maintenance,
+        field_manager: FIELD_MANAGER.to_owned(),
+    };
+
+    let (conversion_webhook, _initial_reconcile_rx) =
+        ConversionWebhook::new(crds_and_handlers, client, conversion_webhook_options);
+
+    let webhook_server_options = WebhookServerOptions {
+        socket_addr: WebhookServer::DEFAULT_SOCKET_ADDRESS,
+        webhook_namespace: operator_environment.operator_namespace.to_owned(),
+        webhook_service_name: operator_environment.operator_service_name.to_owned(),
+    };
+
+    WebhookServer::new(vec![Box::new(conversion_webhook)], webhook_server_options)
+        .await
+        .context(CreateWebhookSnafu)
+}

rust/operator-binary/src/crd/mod.rs

@@ -0,0 +1 @@
+pub mod conversion;