simplify code according to feedback

doc/book/reference-manual/configuration.md

@@ -35,14 +35,14 @@ bootstrap_peers = [
 
 
 [consul_discovery]
-mode = "node"
+api = "catalog"
 consul_http_addr = "http://127.0.0.1:8500"
 service_name = "garage-daemon"
 ca_cert = "/etc/consul/consul-ca.crt"
 client_cert = "/etc/consul/consul-client.crt"
 client_key = "/etc/consul/consul-key.crt"
-# for `service` mode, unset client_cert and client_key, and optionally enable `consul_http_token`
-# consul_http_token = "abcdef-01234-56789"
+# for `catalog` API mode, unset client_cert and client_key, and optionally enable `token`
+# token = "abcdef-01234-56789"
 tls_skip_verify = false
 tags = [ "dns-enabled" ]
 meta = { dns-acl = "allow trusted" }

src/rpc/consul.rs

@@ -19,10 +19,15 @@ struct ConsulQueryEntry {
 	address: String,
 	#[serde(rename = "ServicePort")]
 	service_port: u16,
-	#[serde(rename = "NodeMeta")]
-	node_meta: HashMap<String, String>,
 	#[serde(rename = "ServiceMeta")]
-	service_meta: HashMap<String, String>,
+	meta: HashMap<String, String>,
+}
+
+#[derive(Serialize, Clone, Debug)]
+#[serde(untagged)]
+enum PublishRequest {
+	Catalog(ConsulPublishEntry),
+	Service(ConsulPublishService),
 }
 
 #[derive(Serialize, Clone, Debug)]
@@ -31,8 +36,6 @@ struct ConsulPublishEntry {
 	node: String,
 	#[serde(rename = "Address")]
 	address: IpAddr,
-	#[serde(rename = "NodeMeta")]
-	node_meta: HashMap<String, String>,
 	#[serde(rename = "Service")]
 	service: ConsulPublishCatalogService,
 }
@@ -46,7 +49,7 @@ struct ConsulPublishCatalogService {
 	#[serde(rename = "Tags")]
 	tags: Vec<String>,
 	#[serde(rename = "Meta")]
-	service_meta: HashMap<String, String>,
+	meta: HashMap<String, String>,
 	#[serde(rename = "Address")]
 	address: IpAddr,
 	#[serde(rename = "Port")]
@@ -77,42 +80,36 @@ pub struct ConsulDiscovery {
 
 impl ConsulDiscovery {
 	pub fn new(config: ConsulDiscoveryConfig) -> Result<Self, ConsulError> {
-		let mut builder: reqwest::ClientBuilder = reqwest::Client::builder();
+		let mut builder: reqwest::ClientBuilder = reqwest::Client::builder().use_rustls_tls();
 		if config.tls_skip_verify {
 			builder = builder.danger_accept_invalid_certs(true);
 		} else if let Some(ca_cert) = &config.ca_cert {
 			let mut ca_cert_buf = vec![];
 			File::open(ca_cert)?.read_to_end(&mut ca_cert_buf)?;
-			builder = builder.use_rustls_tls();
 			builder =
 				builder.add_root_certificate(reqwest::Certificate::from_pem(&ca_cert_buf[..])?);
 		}
 
-		let client: reqwest::Client = match &config.consul_http_api {
-			ConsulDiscoveryAPI::Catalog => {
-				match (&config.client_cert, &config.client_key) {
-					(Some(client_cert), Some(client_key)) => {
-						let mut client_cert_buf = vec![];
-						File::open(client_cert)?.read_to_end(&mut client_cert_buf)?;
+		match &config.api {
+			ConsulDiscoveryAPI::Catalog => match (&config.client_cert, &config.client_key) {
+				(Some(client_cert), Some(client_key)) => {
+					let mut client_cert_buf = vec![];
+					File::open(client_cert)?.read_to_end(&mut client_cert_buf)?;
 
-						let mut client_key_buf = vec![];
-						File::open(client_key)?.read_to_end(&mut client_key_buf)?;
+					let mut client_key_buf = vec![];
+					File::open(client_key)?.read_to_end(&mut client_key_buf)?;
 
-						let identity = reqwest::Identity::from_pem(
-							&[&client_cert_buf[..], &client_key_buf[..]].concat()[..],
-						)?;
+					let identity = reqwest::Identity::from_pem(
+						&[&client_cert_buf[..], &client_key_buf[..]].concat()[..],
+					)?;
 
-						builder = builder.use_rustls_tls();
-						builder = builder.identity(identity);
-					}
-					(None, None) => {}
-					_ => return Err(ConsulError::InvalidTLSConfig),
+					builder = builder.identity(identity);
 				}
-
-				builder.build()?
-			}
+				(None, None) => {}
+				_ => return Err(ConsulError::InvalidTLSConfig),
+			},
 			ConsulDiscoveryAPI::Agent => {
-				if let Some(token) = &config.consul_http_token {
+				if let Some(token) = &config.token {
 					let mut headers = reqwest::header::HeaderMap::new();
 					headers.insert(
 						"x-consul-token",
@@ -120,11 +117,11 @@ impl ConsulDiscovery {
 					);
 					builder = builder.default_headers(headers);
 				}
-
-				builder.build()?
 			}
 		};
 
+		let client: reqwest::Client = builder.build()?;
+
 		Ok(Self { client, config })
 	}
 
@@ -142,14 +139,11 @@ impl ConsulDiscovery {
 		let mut ret = vec![];
 		for ent in entries {
 			let ip = ent.address.parse::<IpAddr>().ok();
-			let pubkey = match &self.config.consul_http_api {
-				ConsulDiscoveryAPI::Catalog => ent.node_meta.get("pubkey"),
-				ConsulDiscoveryAPI::Agent => {
-					ent.service_meta.get(&format!("{}-pubkey", META_PREFIX))
-				}
-			}
-			.and_then(|k| hex::decode(k).ok())
-			.and_then(|k| NodeID::from_slice(&k[..]));
+			let pubkey = ent
+				.meta
+				.get(&format!("{}-pubkey", META_PREFIX))
+				.and_then(|k| hex::decode(k).ok())
+				.and_then(|k| NodeID::from_slice(&k[..]));
 			if let (Some(ip), Some(pubkey)) = (ip, pubkey) {
 				ret.push((pubkey, SocketAddr::new(ip, ent.service_port)));
 			} else {
@@ -179,47 +173,34 @@ impl ConsulDiscovery {
 		]
 		.concat();
 
-		let meta_prefix: String = match &self.config.consul_http_api {
-			ConsulDiscoveryAPI::Catalog => "".to_string(),
-			ConsulDiscoveryAPI::Agent => format!("{}-", META_PREFIX),
-		};
-
-		let mut meta = HashMap::from([
-			(format!("{}pubkey", meta_prefix), hex::encode(node_id)),
-			(format!("{}hostname", meta_prefix), hostname.to_string()),
-		]);
-
-		if let Some(global_meta) = &self.config.meta {
-			for (key, value) in global_meta.into_iter() {
-				meta.insert(key.clone(), value.clone());
-			}
-		}
+		let mut meta = self.config.meta.clone().unwrap_or_default();
+		meta.insert(format!("{}-pubkey", META_PREFIX), hex::encode(node_id));
+		meta.insert(format!("{}-hostname", META_PREFIX), hostname.to_string());
 
 		let url = format!(
 			"{}/v1/{}",
 			self.config.consul_http_addr,
-			(match &self.config.consul_http_api {
+			(match &self.config.api {
 				ConsulDiscoveryAPI::Catalog => "catalog/register",
 				ConsulDiscoveryAPI::Agent => "agent/service/register?replace-existing-checks",
 			})
 		);
 
 		let req = self.client.put(&url);
-		let http = (match &self.config.consul_http_api {
-			ConsulDiscoveryAPI::Catalog => req.json(&ConsulPublishEntry {
+		let advertisement: PublishRequest = match &self.config.api {
+			ConsulDiscoveryAPI::Catalog => PublishRequest::Catalog(ConsulPublishEntry {
 				node: node.clone(),
 				address: rpc_public_addr.ip(),
-				node_meta: meta.clone(),
 				service: ConsulPublishCatalogService {
 					service_id: node.clone(),
 					service_name: self.config.service_name.clone(),
 					tags,
-					service_meta: meta.clone(),
+					meta: meta.clone(),
 					address: rpc_public_addr.ip(),
 					port: rpc_public_addr.port(),
 				},
 			}),
-			ConsulDiscoveryAPI::Agent => req.json(&ConsulPublishService {
+			ConsulDiscoveryAPI::Agent => PublishRequest::Service(ConsulPublishService {
 				service_id: node.clone(),
 				service_name: self.config.service_name.clone(),
 				tags,
@@ -227,9 +208,8 @@ impl ConsulDiscovery {
 				address: rpc_public_addr.ip(),
 				port: rpc_public_addr.port(),
 			}),
-		})
-		.send()
-		.await?;
+		};
+		let http = req.json(&advertisement).send().await?;
 		http.error_for_status()?;
 
 		Ok(())

src/util/config.rs

@@ -135,23 +135,18 @@ pub struct AdminConfig {
 	pub trace_sink: Option<String>,
 }
 
-#[derive(Deserialize, Debug, Clone)]
+#[derive(Deserialize, Debug, Clone, Default)]
+#[serde(rename_all = "lowercase")]
 pub enum ConsulDiscoveryAPI {
-	#[serde(rename_all = "lowercase")]
+	#[default]
 	Catalog,
 	Agent,
 }
-impl ConsulDiscoveryAPI {
-	fn default() -> Self {
-		ConsulDiscoveryAPI::Catalog
-	}
-}
 
 #[derive(Deserialize, Debug, Clone)]
 pub struct ConsulDiscoveryConfig {
 	/// The consul api to use when registering: either `catalog` (the default) or `agent`
-	#[serde(default = "ConsulDiscoveryAPI::default")]
-	pub consul_http_api: ConsulDiscoveryAPI,
+	pub api: ConsulDiscoveryAPI,
 	/// Consul http or https address to connect to to discover more peers
 	pub consul_http_addr: String,
 	/// Consul service name to use
@@ -163,7 +158,7 @@ pub struct ConsulDiscoveryConfig {
 	/// Client TLS key to use when connecting to Consul
 	pub client_key: Option<String>,
 	/// /// Token to use for connecting to consul
-	pub consul_http_token: Option<String>,
+	pub token: Option<String>,
 	/// Skip TLS hostname verification
 	#[serde(default)]
 	pub tls_skip_verify: bool,