1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
|
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 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 advertisement: ConsulPublishService = ConsulPublishService {
service_id: node.clone(),
service_name: self.config.service_name.clone(),
tags,
meta,
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),
}
|
