Externalise Consul module to df-consul crate

6 files changed, 33 insertions, 272 deletions

diff --git a/Cargo.lock b/Cargo.lock
index e2acbd6..1752101 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -396,6 +396,19 @@ dependencies = [
 ]
 
 [[package]]
+name = "df-consul"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5ec5111d5daddfbab491780564dc8270c29c90553fab98d677489600a8623c76"
+dependencies = [
+ "anyhow",
+ "bytes",
+ "log",
+ "reqwest",
+ "serde",
+]
+
+[[package]]
 name = "dhat"
 version = "0.3.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -1945,6 +1958,7 @@ dependencies = [
  "async-compression",
  "bytes",
  "chrono",
+ "df-consul",
  "dhat",
  "envy",
  "futures",
diff --git a/Cargo.toml b/Cargo.toml
index 416038f..0678819 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -37,6 +37,7 @@ uuid = { version = "1.2", features = ["v4"] }
 opentelemetry = "0.17"
 opentelemetry-prometheus = "0.10"
 prometheus = "0.13"
+df-consul = "0.1.0"
 
 dhat = { version = "0.3", optional = true }
 
diff --git a/src/cert_store.rs b/src/cert_store.rs
index 97fbf32..2d3fb90 100644
--- a/src/cert_store.rs
+++ b/src/cert_store.rs
@@ -20,6 +20,7 @@ use crate::proxy_config::*;
 
 pub struct CertStore {
 	consul: Consul,
+	node_name: String,
 	letsencrypt_email: String,
 	certs: RwLock<HashMap<String, Arc<Cert>>>,
 	self_signed_certs: RwLock<HashMap<String, Arc<Cert>>>,
@@ -30,6 +31,7 @@ pub struct CertStore {
 impl CertStore {
 	pub fn new(
 		consul: Consul,
+		node_name: String,
 		rx_proxy_config: watch::Receiver<Arc<ProxyConfig>>,
 		letsencrypt_email: String,
 		exit_on_err: impl Fn(anyhow::Error) + Send + 'static,
@@ -38,6 +40,7 @@ impl CertStore {
 
 		let cert_store = Arc::new(Self {
 			consul,
+			node_name,
 			certs: RwLock::new(HashMap::new()),
 			self_signed_certs: RwLock::new(HashMap::new()),
 			rx_proxy_config,
@@ -190,7 +193,7 @@ impl CertStore {
 		// that delay expires
 
 		let lock_path = format!("renew_lock/{}", domain);
-		let lock_name = format!("tricot/renew:{}@{}", domain, self.consul.local_node.clone());
+		let lock_name = format!("tricot/renew:{}@{}", domain, self.node_name);
 		let session = self
 			.consul
 			.create_session(&ConsulSessionRequest {
diff --git a/src/consul.rs b/src/consul.rs
deleted file mode 100644
index 13b99d8..0000000
--- a/src/consul.rs
+++ /dev/null
@@ -1,261 +0,0 @@
-use std::collections::HashMap;
-use std::fs::File;
-use std::io::Read;
-
-use anyhow::{bail, Result};
-use bytes::Bytes;
-use log::*;
-use reqwest::StatusCode;
-use serde::{Deserialize, Serialize};
-
-pub struct ConsulConfig {
-	pub addr: String,
-	pub ca_cert: Option<String>,
-	pub tls_skip_verify: bool,
-	pub client_cert: Option<String>,
-	pub client_key: Option<String>,
-}
-
-// ---- Watch and retrieve Consul catalog ----
-//
-#[derive(Serialize, Deserialize, Debug)]
-pub struct ConsulNode {
-	#[serde(rename = "Node")]
-	pub node: String,
-	#[serde(rename = "Address")]
-	pub address: String,
-	#[serde(rename = "Meta")]
-	pub meta: HashMap<String, String>,
-}
-
-#[derive(Serialize, Deserialize, Debug)]
-pub struct ConsulServiceEntry {
-	#[serde(rename = "Service")]
-	pub service: String,
-
-	#[serde(rename = "Address")]
-	pub address: String,
-
-	#[serde(rename = "Port")]
-	pub port: u16,
-
-	#[serde(rename = "Tags")]
-	pub tags: Vec<String>,
-}
-
-#[derive(Serialize, Deserialize, Debug)]
-pub struct ConsulNodeCatalog {
-	#[serde(rename = "Node")]
-	pub node: ConsulNode,
-	#[serde(rename = "Services")]
-	pub services: HashMap<String, ConsulServiceEntry>,
-}
-
-// ---- Consul session management ----
-
-#[derive(Serialize, Deserialize, Debug)]
-pub struct ConsulSessionRequest {
-	#[serde(rename = "Name")]
-	pub name: String,
-
-	#[serde(rename = "Node")]
-	pub node: Option<String>,
-
-	#[serde(rename = "LockDelay")]
-	pub lock_delay: Option<String>,
-
-	#[serde(rename = "TTL")]
-	pub ttl: Option<String>,
-
-	#[serde(rename = "Behavior")]
-	pub behavior: Option<String>,
-}
-
-#[derive(Serialize, Deserialize, Debug)]
-pub struct ConsulSessionResponse {
-	#[serde(rename = "ID")]
-	pub id: String,
-}
-
-#[derive(Clone)]
-pub struct Consul {
-	client: reqwest::Client,
-
-	url: String,
-	kv_prefix: String,
-
-	pub local_node: String,
-}
-
-impl Consul {
-	pub fn new(config: ConsulConfig, kv_prefix: &str, local_node: &str) -> Result<Self> {
-		let client = 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 identity = reqwest::Identity::from_pem(
-					&[&client_cert_buf[..], &client_key_buf[..]].concat()[..],
-				)?;
-
-				if config.tls_skip_verify {
-					reqwest::Client::builder()
-						.use_rustls_tls()
-						.danger_accept_invalid_certs(true)
-						.identity(identity)
-						.build()?
-				} 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)?;
-
-					reqwest::Client::builder()
-						.use_rustls_tls()
-						.add_root_certificate(reqwest::Certificate::from_pem(&ca_cert_buf[..])?)
-						.identity(identity)
-						.build()?
-				} else {
-					reqwest::Client::builder()
-						.use_rustls_tls()
-						.identity(identity)
-						.build()?
-				}
-			}
-			(None, None) => reqwest::Client::new(),
-			_ => bail!("Incomplete Consul TLS configuration parameters"),
-		};
-
-		Ok(Self {
-			client,
-			url: config.addr.trim_end_matches('/').to_string(),
-			kv_prefix: kv_prefix.to_string(),
-			local_node: local_node.into(),
-		})
-	}
-
-	pub async fn list_nodes(&self) -> Result<Vec<ConsulNode>> {
-		debug!("list_nodes");
-
-		let url = format!("{}/v1/catalog/nodes", self.url);
-
-		let http = self.client.get(&url).send().await?;
-		let resp: Vec<ConsulNode> = http.json().await?;
-		Ok(resp)
-	}
-
-	pub async fn watch_node(
-		&self,
-		host: &str,
-		idx: Option<usize>,
-	) -> Result<(ConsulNodeCatalog, usize)> {
-		debug!("watch_node {} {:?}", host, idx);
-
-		let url = match idx {
-			Some(i) => format!("{}/v1/catalog/node/{}?index={}", self.url, host, i),
-			None => format!("{}/v1/catalog/node/{}", self.url, host),
-		};
-
-		let http = self.client.get(&url).send().await?;
-		let new_idx = match http.headers().get("X-Consul-Index") {
-			Some(v) => v.to_str()?.parse::<usize>()?,
-			None => bail!("X-Consul-Index header not found"),
-		};
-
-		let resp: ConsulNodeCatalog = http.json().await?;
-		Ok((resp, new_idx))
-	}
-
-	// ---- KV get and put ----
-
-	pub async fn kv_get(&self, key: &str) -> Result<Option<Bytes>> {
-		debug!("kv_get {}", key);
-
-		let url = format!("{}/v1/kv/{}{}?raw", self.url, self.kv_prefix, key);
-		let http = self.client.get(&url).send().await?;
-		match http.status() {
-			StatusCode::OK => Ok(Some(http.bytes().await?)),
-			StatusCode::NOT_FOUND => Ok(None),
-			_ => Err(anyhow!(
-				"Consul request failed: {:?}",
-				http.error_for_status()
-			)),
-		}
-	}
-
-	pub async fn kv_get_json<T: for<'de> Deserialize<'de>>(&self, key: &str) -> Result<Option<T>> {
-		debug!("kv_get_json {}", key);
-
-		let url = format!("{}/v1/kv/{}{}?raw", self.url, self.kv_prefix, key);
-		let http = self.client.get(&url).send().await?;
-		match http.status() {
-			StatusCode::OK => Ok(Some(http.json().await?)),
-			StatusCode::NOT_FOUND => Ok(None),
-			_ => Err(anyhow!(
-				"Consul request failed: {:?}",
-				http.error_for_status()
-			)),
-		}
-	}
-
-	pub async fn kv_put(&self, key: &str, bytes: Bytes) -> Result<()> {
-		debug!("kv_put {}", key);
-
-		let url = format!("{}/v1/kv/{}{}", self.url, self.kv_prefix, key);
-		let http = self.client.put(&url).body(bytes).send().await?;
-		http.error_for_status()?;
-		Ok(())
-	}
-
-	pub async fn kv_put_json<T: Serialize>(&self, key: &str, value: &T) -> Result<()> {
-		debug!("kv_put_json {}", key);
-
-		let url = format!("{}/v1/kv/{}{}", self.url, self.kv_prefix, key);
-		let http = self.client.put(&url).json(value).send().await?;
-		http.error_for_status()?;
-		Ok(())
-	}
-
-	pub async fn kv_delete(&self, key: &str) -> Result<()> {
-		let url = format!("{}/v1/kv/{}{}", self.url, self.kv_prefix, key);
-		let http = self.client.delete(&url).send().await?;
-		http.error_for_status()?;
-		Ok(())
-	}
-
-	// ---- Locking ----
-
-	pub async fn create_session(&self, req: &ConsulSessionRequest) -> Result<String> {
-		debug!("create_session {:?}", req);
-
-		let url = format!("{}/v1/session/create", self.url);
-		let http = self.client.put(&url).json(req).send().await?;
-		let resp: ConsulSessionResponse = http.json().await?;
-		Ok(resp.id)
-	}
-
-	pub async fn acquire(&self, key: &str, bytes: Bytes, session: &str) -> Result<bool> {
-		debug!("acquire {}", key);
-
-		let url = format!(
-			"{}/v1/kv/{}{}?acquire={}",
-			self.url, self.kv_prefix, key, session
-		);
-		let http = self.client.put(&url).body(bytes).send().await?;
-		let resp: bool = http.json().await?;
-		Ok(resp)
-	}
-
-	pub async fn release(&self, key: &str, bytes: Bytes, session: &str) -> Result<()> {
-		debug!("release {}", key);
-
-		let url = format!(
-			"{}/v1/kv/{}{}?release={}",
-			self.url, self.kv_prefix, key, session
-		);
-		let http = self.client.put(&url).body(bytes).send().await?;
-		http.error_for_status()?;
-		Ok(())
-	}
-}
diff --git a/src/main.rs b/src/main.rs
index 79c4a9b..c97bddf 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -13,7 +13,6 @@ use tokio::sync::watch;
 
 mod cert;
 mod cert_store;
-mod consul;
 mod http;
 mod https;
 mod metrics;
@@ -21,6 +20,7 @@ mod proxy_config;
 mod reverse_proxy;
 mod tls_util;
 
+pub use df_consul as consul;
 use proxy_config::ProxyConfig;
 
 #[cfg(feature = "dhat-heap")]
@@ -139,13 +139,17 @@ async fn main() {
 		client_key: opt.consul_client_key.clone(),
 	};
 
-	let consul = consul::Consul::new(consul_config, &opt.consul_kv_prefix, &opt.node_name)
+	let consul = consul::Consul::new(consul_config, &opt.consul_kv_prefix)
 		.expect("Error creating Consul client");
-	let rx_proxy_config =
-		proxy_config::spawn_proxy_config_task(consul.clone(), exit_signal.clone());
+	let rx_proxy_config = proxy_config::spawn_proxy_config_task(
+		consul.clone(),
+		opt.node_name.clone(),
+		exit_signal.clone(),
+	);
 
 	let cert_store = cert_store::CertStore::new(
 		consul.clone(),
+		opt.node_name.clone(),
 		rx_proxy_config.clone(),
 		opt.letsencrypt_email.clone(),
 		exit_on_err.clone(),
diff --git a/src/proxy_config.rs b/src/proxy_config.rs
index ac37229..af1f576 100644
--- a/src/proxy_config.rs
+++ b/src/proxy_config.rs
@@ -252,6 +252,7 @@ struct NodeWatchState {
 
 pub fn spawn_proxy_config_task(
 	consul: Consul,
+	local_node: String,
 	mut must_exit: watch::Receiver<bool>,
 ) -> watch::Receiver<Arc<ProxyConfig>> {
 	let (tx, rx) = watch::channel(Arc::new(ProxyConfig {
@@ -354,12 +355,11 @@ pub fn spawn_proxy_config_task(
 			let mut entries = vec![];
 			for (node_name, watch_state) in nodes.iter() {
 				if let Some(catalog) = &watch_state.last_catalog {
-					let same_node = *node_name == consul.local_node;
-					let same_site =
-						match (node_site.get(node_name), node_site.get(&consul.local_node)) {
-							(Some(s1), Some(s2)) => s1 == s2,
-							_ => false,
-						};
+					let same_node = *node_name == local_node;
+					let same_site = match (node_site.get(node_name), node_site.get(&local_node)) {
+						(Some(s1), Some(s2)) => s1 == s2,
+						_ => false,
+					};
 
 					entries.extend(parse_consul_catalog(catalog, same_node, same_site));
 				}