register consul services against local agent instead of catalog api

This commit is contained in:
Roberto Hidalgo 2023-05-05 16:18:24 -06:00
parent 9d833bb7ef
commit 02ba9016ab
8 changed files with 262 additions and 6 deletions

View file

@ -25,7 +25,7 @@ git clone https://git.deuxfleurs.fr/Deuxfleurs/garage
cd garage
```
*Optionnaly, you can use our nix.conf file to speed up compilations:*
*Optionally, you can use our nix.conf file to speed up compilations:*
```bash
sudo mkdir -p /etc/nix

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@ -88,6 +88,7 @@ sqlite = [ "garage_model/sqlite" ]
# Automatic registration and discovery via Consul API
consul-discovery = [ "garage_rpc/consul-discovery" ]
consul-service-discovery = [ "garage_rpc/consul-service-discovery" ]
# Automatic registration and discovery via Kubernetes API
kubernetes-discovery = [ "garage_rpc/kubernetes-discovery" ]
# Prometheus exporter (/metrics endpoint).

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@ -95,6 +95,8 @@ async fn main() {
"sqlite",
#[cfg(feature = "consul-discovery")]
"consul-discovery",
#[cfg(feature = "consul-service-discovery")]
"consul-service-discovery",
#[cfg(feature = "kubernetes-discovery")]
"kubernetes-discovery",
#[cfg(feature = "metrics")]

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@ -50,4 +50,5 @@ netapp = { version = "0.5.2", features = ["telemetry"] }
[features]
kubernetes-discovery = [ "kube", "k8s-openapi", "schemars" ]
consul-discovery = [ "reqwest", "err-derive" ]
consul-service-discovery = [ "reqwest", "err-derive" ]
system-libs = [ "sodiumoxide/use-pkg-config" ]

166
src/rpc/consul_services.rs Normal file
View file

@ -0,0 +1,166 @@
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::ConsulServiceConfig;
const META_PREFIX: &str = "fr-deuxfleurs-garagehq";
#[derive(Deserialize, Clone, Debug)]
struct ConsulQueryEntry {
#[serde(rename = "Address")]
address: String,
#[serde(rename = "ServicePort")]
service_port: u16,
#[serde(rename = "ServiceMeta")]
service_meta: HashMap<String, String>,
}
#[derive(Serialize, Clone, Debug)]
struct ConsulPublishService {
#[serde(rename = "ID")]
service_id: String,
#[serde(rename = "Name")]
service_name: String,
#[serde(rename = "Tags")]
tags: Vec<String>,
#[serde(rename = "Address")]
address: IpAddr,
#[serde(rename = "Port")]
port: u16,
#[serde(rename = "Meta")]
meta: HashMap<String, String>,
}
// ----
pub struct ConsulServiceDiscovery {
config: ConsulServiceConfig,
client: reqwest::Client,
}
impl ConsulServiceDiscovery {
pub fn new(config: ConsulServiceConfig) -> Result<Self, ConsulError> {
let mut builder: reqwest::ClientBuilder = match &config.ca_cert {
Some(client_ca) => {
let mut ca_cert_buf = vec![];
File::open(client_ca)?.read_to_end(&mut ca_cert_buf)?;
let req: reqwest::ClientBuilder = reqwest::Client::builder()
.add_root_certificate(reqwest::Certificate::from_pem(&ca_cert_buf[..])?)
.use_rustls_tls();
if config.tls_skip_verify {
req.danger_accept_invalid_certs(true)
} else {
req
}
}
None => reqwest::Client::builder(),
};
if let Some(token) = &config.consul_http_token {
let mut headers = reqwest::header::HeaderMap::new();
headers.insert("x-consul-token", reqwest::header::HeaderValue::from_str(&token)?);
builder = builder.default_headers(headers);
}
let client = builder.build()?;
Ok(Self { client, config })
}
// ---- READING FROM CONSUL CATALOG ----
pub async fn get_consul_services(&self) -> Result<Vec<(NodeID, SocketAddr)>, ConsulError> {
let url = format!(
"{}/v1/catalog/service/{}",
self.config.consul_http_addr, self.config.service_name
);
let req = self.client.get(&url);
let http = req.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
.service_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 {
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 tags = [
vec!["advertised-by-garage".into(), hostname.into()],
self.config.tags.clone(),
]
.concat();
let advertisement: ConsulPublishService = ConsulPublishService {
service_id: node.clone(),
service_name: self.config.service_name.clone(),
tags,
meta: [
(format!("{}-pubkey", META_PREFIX), hex::encode(node_id)),
(format!("{}-hostname", META_PREFIX), hostname.to_string()),
]
.iter()
.cloned()
.collect(),
address: rpc_public_addr.ip(),
port: rpc_public_addr.port(),
};
let url = format!(
"{}/v1/agent/service/register?replace-existing-checks",
self.config.consul_http_addr
);
let req = self.client.put(&url);
let http = req.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 HTTP header error: {}", _0)]
HeaderValue(#[error(source)] reqwest::header::InvalidHeaderValue),
}

View file

@ -8,6 +8,8 @@ mod system_metrics;
#[cfg(feature = "consul-discovery")]
mod consul;
#[cfg(feature = "consul-service-discovery")]
mod consul_services;
#[cfg(feature = "kubernetes-discovery")]
mod kubernetes;

View file

@ -32,6 +32,8 @@ use garage_util::time::*;
#[cfg(feature = "consul-discovery")]
use crate::consul::ConsulDiscovery;
#[cfg(feature = "consul-service-discovery")]
use crate::consul_services::ConsulServiceDiscovery;
#[cfg(feature = "kubernetes-discovery")]
use crate::kubernetes::*;
use crate::layout::*;
@ -98,12 +100,14 @@ pub struct System {
system_endpoint: Arc<Endpoint<SystemRpc, System>>,
rpc_listen_addr: SocketAddr,
#[cfg(any(feature = "consul-discovery", feature = "kubernetes-discovery"))]
#[cfg(any(feature = "consul-discovery", feature = "consul-service-discovery", feature = "kubernetes-discovery"))]
rpc_public_addr: Option<SocketAddr>,
bootstrap_peers: Vec<String>,
#[cfg(feature = "consul-discovery")]
consul_discovery: Option<ConsulDiscovery>,
#[cfg(feature = "consul-service-discovery")]
consul_service_discovery: Option<ConsulServiceDiscovery>,
#[cfg(feature = "kubernetes-discovery")]
kubernetes_discovery: Option<KubernetesDiscoveryConfig>,
@ -346,6 +350,19 @@ impl System {
warn!("Consul discovery is not enabled in this build.");
}
#[cfg(feature = "consul-service-discovery")]
let consul_service_discovery = match &config.consul_service_discovery {
Some(cfg) => Some(
ConsulServiceDiscovery::new(cfg.clone())
.ok_or_message("Invalid Consul service discovery configuration")?,
),
None => None,
};
#[cfg(not(feature = "consul-service-discovery"))]
if config.consul_service_discovery.is_some() {
warn!("Consul service discovery is not enabled in this build.");
}
#[cfg(not(feature = "kubernetes-discovery"))]
if config.kubernetes_discovery.is_some() {
warn!("Kubernetes discovery is not enabled in this build.");
@ -369,11 +386,13 @@ impl System {
replication_mode,
replication_factor,
rpc_listen_addr: config.rpc_bind_addr,
#[cfg(any(feature = "consul-discovery", feature = "kubernetes-discovery"))]
#[cfg(any(feature = "consul-discovery", feature = "consul-service-discovery", feature = "kubernetes-discovery"))]
rpc_public_addr,
bootstrap_peers: config.bootstrap_peers.clone(),
#[cfg(feature = "consul-discovery")]
consul_discovery,
#[cfg(feature = "consul-service-discovery")]
consul_service_discovery,
#[cfg(feature = "kubernetes-discovery")]
kubernetes_discovery: config.kubernetes_discovery.clone(),
metrics,
@ -555,6 +574,34 @@ impl System {
}
}
#[cfg(feature = "consul-service-discovery")]
async fn advertise_to_consul(self: Arc<Self>) {
let c = match &self.consul_service_discovery {
Some(c) => c,
_ => return,
};
let rpc_public_addr = match self.rpc_public_addr {
Some(addr) => addr,
None => {
warn!("Not advertising to Consul because rpc_public_addr is not defined in config file and could not be autodetected.");
return;
}
};
if let Err(e) = c
.publish_consul_service(
self.netapp.id,
&self.local_status.load_full().hostname,
rpc_public_addr,
)
.await
{
error!("Error while publishing Consul service: {}", e);
}
}
#[cfg(feature = "kubernetes-discovery")]
async fn advertise_to_kubernetes(self: Arc<Self>) {
let k = match &self.kubernetes_discovery {
@ -744,7 +791,7 @@ impl System {
ping_list.extend(peers.0.iter().map(|(id, addr)| ((*id).into(), *addr)))
}
// Fetch peer list from Consul
// Fetch peer list from Consul Nodes
#[cfg(feature = "consul-discovery")]
if let Some(c) = &self.consul_discovery {
match c.get_consul_nodes().await {
@ -757,6 +804,19 @@ impl System {
}
}
// Fetch peer list from Consul Services
#[cfg(feature = "consul-service-discovery")]
if let Some(c) = &self.consul_service_discovery {
match c.get_consul_services().await {
Ok(node_list) => {
ping_list.extend(node_list);
}
Err(e) => {
warn!("Could not retrieve service list from Consul: {}", e);
}
}
}
// Fetch peer list from Kubernetes
#[cfg(feature = "kubernetes-discovery")]
if let Some(k) = &self.kubernetes_discovery {
@ -796,6 +856,9 @@ impl System {
#[cfg(feature = "consul-discovery")]
tokio::spawn(self.clone().advertise_to_consul());
#[cfg(feature = "consul-service-discovery")]
tokio::spawn(self.clone().advertise_to_consul());
#[cfg(feature = "kubernetes-discovery")]
tokio::spawn(self.clone().advertise_to_kubernetes());

View file

@ -56,6 +56,9 @@ pub struct Config {
/// Configuration for automatic node discovery through Consul
#[serde(default)]
pub consul_discovery: Option<ConsulDiscoveryConfig>,
/// Configuration for automatic node discovery through Consul
#[serde(default)]
pub consul_service_discovery: Option<ConsulServiceConfig>,
/// Configuration for automatic node discovery through Kubernetes
#[serde(default)]
pub kubernetes_discovery: Option<KubernetesDiscoveryConfig>,
@ -152,6 +155,24 @@ pub struct ConsulDiscoveryConfig {
pub tls_skip_verify: bool,
}
#[derive(Deserialize, Debug, Clone)]
pub struct ConsulServiceConfig {
/// Consul http or https address to connect to to discover more peers
pub consul_http_addr: String,
/// Token to use for connecting to consul
pub consul_http_token: Option<String>,
/// Consul service name to use
pub service_name: String,
/// CA TLS certificate to use when connecting to Consul
pub ca_cert: Option<String>,
// Additional tags to add to the service
#[serde(default)]
pub tags: Vec<String>,
/// Skip TLS hostname verification
#[serde(default)]
pub tls_skip_verify: bool,
}
#[derive(Deserialize, Debug, Clone)]
pub struct KubernetesDiscoveryConfig {
/// Kubernetes namespace the service discovery resources are be created in