parent
752593e274
commit
fad172e54a
GPG Key ID:
0E496D15096376BE
@ -1,261 +0,0 @@ |
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use std::collections::HashMap; |
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use std::fs::File; |
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use std::io::Read; |
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use anyhow::{bail, Result}; |
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use bytes::Bytes; |
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use log::*; |
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use reqwest::StatusCode; |
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use serde::{Deserialize, Serialize}; |
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pub struct ConsulConfig { |
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pub addr: String, |
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pub ca_cert: Option<String>, |
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pub tls_skip_verify: bool, |
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pub client_cert: Option<String>, |
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pub client_key: Option<String>, |
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} |
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// ---- Watch and retrieve Consul catalog ----
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//
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#[derive(Serialize, Deserialize, Debug)] |
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pub struct ConsulNode { |
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#[serde(rename = "Node")] |
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pub node: String, |
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#[serde(rename = "Address")] |
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pub address: String, |
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#[serde(rename = "Meta")] |
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pub meta: HashMap<String, String>, |
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} |
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#[derive(Serialize, Deserialize, Debug)] |
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pub struct ConsulServiceEntry { |
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#[serde(rename = "Service")] |
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pub service: String, |
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#[serde(rename = "Address")] |
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pub address: String, |
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#[serde(rename = "Port")] |
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pub port: u16, |
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#[serde(rename = "Tags")] |
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pub tags: Vec<String>, |
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} |
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#[derive(Serialize, Deserialize, Debug)] |
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pub struct ConsulNodeCatalog { |
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#[serde(rename = "Node")] |
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pub node: ConsulNode, |
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#[serde(rename = "Services")] |
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pub services: HashMap<String, ConsulServiceEntry>, |
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} |
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// ---- Consul session management ----
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#[derive(Serialize, Deserialize, Debug)] |
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pub struct ConsulSessionRequest { |
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#[serde(rename = "Name")] |
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pub name: String, |
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#[serde(rename = "Node")] |
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pub node: Option<String>, |
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#[serde(rename = "LockDelay")] |
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pub lock_delay: Option<String>, |
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#[serde(rename = "TTL")] |
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pub ttl: Option<String>, |
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#[serde(rename = "Behavior")] |
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pub behavior: Option<String>, |
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} |
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#[derive(Serialize, Deserialize, Debug)] |
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pub struct ConsulSessionResponse { |
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#[serde(rename = "ID")] |
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pub id: String, |
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} |
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#[derive(Clone)] |
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pub struct Consul { |
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client: reqwest::Client, |
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url: String, |
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kv_prefix: String, |
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pub local_node: String, |
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} |
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impl Consul { |
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pub fn new(config: ConsulConfig, kv_prefix: &str, local_node: &str) -> Result<Self> { |
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let client = match (&config.client_cert, &config.client_key) { |
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(Some(client_cert), Some(client_key)) => { |
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let mut client_cert_buf = vec![]; |
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File::open(client_cert)?.read_to_end(&mut client_cert_buf)?; |
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let mut client_key_buf = vec![]; |
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File::open(client_key)?.read_to_end(&mut client_key_buf)?; |
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let identity = reqwest::Identity::from_pem( |
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&[&client_cert_buf[..], &client_key_buf[..]].concat()[..], |
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)?; |
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if config.tls_skip_verify { |
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reqwest::Client::builder() |
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.use_rustls_tls() |
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.danger_accept_invalid_certs(true) |
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.identity(identity) |
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.build()? |
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} else if let Some(ca_cert) = &config.ca_cert { |
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let mut ca_cert_buf = vec![]; |
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File::open(ca_cert)?.read_to_end(&mut ca_cert_buf)?; |
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reqwest::Client::builder() |
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.use_rustls_tls() |
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.add_root_certificate(reqwest::Certificate::from_pem(&ca_cert_buf[..])?) |
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.identity(identity) |
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.build()? |
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} else { |
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reqwest::Client::builder() |
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.use_rustls_tls() |
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.identity(identity) |
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.build()? |
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} |
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} |
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(None, None) => reqwest::Client::new(), |
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_ => bail!("Incomplete Consul TLS configuration parameters"), |
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}; |
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Ok(Self { |
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client, |
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url: config.addr.trim_end_matches('/').to_string(), |
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kv_prefix: kv_prefix.to_string(), |
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local_node: local_node.into(), |
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}) |
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} |
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pub async fn list_nodes(&self) -> Result<Vec<ConsulNode>> { |
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debug!("list_nodes"); |
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let url = format!("{}/v1/catalog/nodes", self.url); |
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let http = self.client.get(&url).send().await?; |
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let resp: Vec<ConsulNode> = http.json().await?; |
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Ok(resp) |
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} |
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pub async fn watch_node( |
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&self, |
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host: &str, |
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idx: Option<usize>, |
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) -> Result<(ConsulNodeCatalog, usize)> { |
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debug!("watch_node {} {:?}", host, idx); |
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let url = match idx { |
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Some(i) => format!("{}/v1/catalog/node/{}?index={}", self.url, host, i), |
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None => format!("{}/v1/catalog/node/{}", self.url, host), |
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}; |
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let http = self.client.get(&url).send().await?; |
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let new_idx = match http.headers().get("X-Consul-Index") { |
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Some(v) => v.to_str()?.parse::<usize>()?, |
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None => bail!("X-Consul-Index header not found"), |
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}; |
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let resp: ConsulNodeCatalog = http.json().await?; |
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Ok((resp, new_idx)) |
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} |
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// ---- KV get and put ----
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pub async fn kv_get(&self, key: &str) -> Result<Option<Bytes>> { |
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debug!("kv_get {}", key); |
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let url = format!("{}/v1/kv/{}{}?raw", self.url, self.kv_prefix, key); |
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let http = self.client.get(&url).send().await?; |
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match http.status() { |
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StatusCode::OK => Ok(Some(http.bytes().await?)), |
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StatusCode::NOT_FOUND => Ok(None), |
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_ => Err(anyhow!( |
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"Consul request failed: {:?}", |
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http.error_for_status() |
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)), |
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} |
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} |
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pub async fn kv_get_json<T: for<'de> Deserialize<'de>>(&self, key: &str) -> Result<Option<T>> { |
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debug!("kv_get_json {}", key); |
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let url = format!("{}/v1/kv/{}{}?raw", self.url, self.kv_prefix, key); |
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let http = self.client.get(&url).send().await?; |
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match http.status() { |
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StatusCode::OK => Ok(Some(http.json().await?)), |
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StatusCode::NOT_FOUND => Ok(None), |
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_ => Err(anyhow!( |
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"Consul request failed: {:?}", |
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http.error_for_status() |
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)), |
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} |
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} |
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pub async fn kv_put(&self, key: &str, bytes: Bytes) -> Result<()> { |
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debug!("kv_put {}", key); |
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let url = format!("{}/v1/kv/{}{}", self.url, self.kv_prefix, key); |
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let http = self.client.put(&url).body(bytes).send().await?; |
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http.error_for_status()?; |
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Ok(()) |
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} |
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pub async fn kv_put_json<T: Serialize>(&self, key: &str, value: &T) -> Result<()> { |
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debug!("kv_put_json {}", key); |
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let url = format!("{}/v1/kv/{}{}", self.url, self.kv_prefix, key); |
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let http = self.client.put(&url).json(value).send().await?; |
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http.error_for_status()?; |
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Ok(()) |
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} |
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pub async fn kv_delete(&self, key: &str) -> Result<()> { |
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let url = format!("{}/v1/kv/{}{}", self.url, self.kv_prefix, key); |
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let http = self.client.delete(&url).send().await?; |
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http.error_for_status()?; |
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Ok(()) |
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} |
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// ---- Locking ----
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pub async fn create_session(&self, req: &ConsulSessionRequest) -> Result<String> { |
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debug!("create_session {:?}", req); |
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let url = format!("{}/v1/session/create", self.url); |
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let http = self.client.put(&url).json(req).send().await?; |
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let resp: ConsulSessionResponse = http.json().await?; |
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Ok(resp.id) |
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} |
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pub async fn acquire(&self, key: &str, bytes: Bytes, session: &str) -> Result<bool> { |
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debug!("acquire {}", key); |
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let url = format!( |
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"{}/v1/kv/{}{}?acquire={}", |
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self.url, self.kv_prefix, key, session |
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); |
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let http = self.client.put(&url).body(bytes).send().await?; |
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let resp: bool = http.json().await?; |
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Ok(resp) |
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} |
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pub async fn release(&self, key: &str, bytes: Bytes, session: &str) -> Result<()> { |
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debug!("release {}", key); |
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let url = format!( |
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"{}/v1/kv/{}{}?release={}", |
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self.url, self.kv_prefix, key, session |
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); |
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let http = self.client.put(&url).body(bytes).send().await?; |
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http.error_for_status()?; |
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Ok(()) |
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} |
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} |
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