use std::collections::HashMap; use std::fs::File; use std::io::Read; use std::net::{IpAddr, SocketAddr}; use err_derive::Error; use serde::{Deserialize, Serialize}; use netapp::NodeID; use garage_util::config::ConsulDiscoveryConfig; #[derive(Deserialize, Clone, Debug)] struct ConsulQueryEntry { #[serde(rename = "Address")] address: String, #[serde(rename = "ServicePort")] service_port: u16, #[serde(rename = "NodeMeta")] node_meta: HashMap<String, String>, } #[derive(Serialize, Clone, Debug)] struct ConsulPublishEntry { #[serde(rename = "Node")] node: String, #[serde(rename = "Address")] address: IpAddr, #[serde(rename = "NodeMeta")] node_meta: HashMap<String, String>, #[serde(rename = "Service")] service: ConsulPublishService, } #[derive(Serialize, Clone, Debug)] struct ConsulPublishService { #[serde(rename = "ID")] service_id: String, #[serde(rename = "Service")] service_name: String, #[serde(rename = "Tags")] tags: Vec<String>, #[serde(rename = "Address")] address: IpAddr, #[serde(rename = "Port")] port: u16, } // ---- pub struct ConsulDiscovery { config: ConsulDiscoveryConfig, client: reqwest::Client, } impl ConsulDiscovery { pub fn new(config: ConsulDiscoveryConfig) -> Result<Self, ConsulError> { 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(), _ => return Err(ConsulError::InvalidTLSConfig), }; Ok(Self { client, config }) } // ---- READING FROM CONSUL CATALOG ---- pub async fn get_consul_nodes(&self) -> Result<Vec<(NodeID, SocketAddr)>, ConsulError> { let url = format!( "{}/v1/catalog/service/{}", self.config.consul_http_addr, self.config.service_name ); let http = self.client.get(&url).send().await?; let entries: Vec<ConsulQueryEntry> = http.json().await?; let mut ret = vec![]; for ent in entries { let ip = ent.address.parse::<IpAddr>().ok(); let pubkey = ent .node_meta .get("pubkey") .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 { warn!( "Could not process node spec from Consul: {:?} (invalid IP or public key)", ent ); } } debug!("Got nodes from Consul: {:?}", ret); Ok(ret) } // ---- PUBLISHING TO CONSUL CATALOG ---- pub async fn publish_consul_service( &self, node_id: NodeID, hostname: &str, rpc_public_addr: SocketAddr, ) -> Result<(), ConsulError> { let node = format!("garage:{}", hex::encode(&node_id[..8])); let advertisement = ConsulPublishEntry { node: node.clone(), address: rpc_public_addr.ip(), node_meta: [ ("pubkey".to_string(), hex::encode(node_id)), ("hostname".to_string(), hostname.to_string()), ] .iter() .cloned() .collect(), service: ConsulPublishService { service_id: node.clone(), service_name: self.config.service_name.clone(), tags: vec!["advertised-by-garage".into(), hostname.into()], address: rpc_public_addr.ip(), port: rpc_public_addr.port(), }, }; let url = format!("{}/v1/catalog/register", self.config.consul_http_addr); let http = self.client.put(&url).json(&advertisement).send().await?; http.error_for_status()?; Ok(()) } } /// Regroup all Consul discovery errors #[derive(Debug, Error)] pub enum ConsulError { #[error(display = "IO error: {}", _0)] Io(#[error(source)] std::io::Error), #[error(display = "HTTP error: {}", _0)] Reqwest(#[error(source)] reqwest::Error), #[error(display = "Invalid Consul TLS configuration")] InvalidTLSConfig, }