Line data Source code
1 : //! Code to manage safekeepers
2 : //!
3 : //! In the local test environment, the data for each safekeeper is stored in
4 : //!
5 : //! ```text
6 : //! .neon/safekeepers/<safekeeper id>
7 : //! ```
8 : use std::io::Write;
9 : use std::path::PathBuf;
10 : use std::{io, result};
11 :
12 : use anyhow::Context;
13 : use camino::Utf8PathBuf;
14 : use postgres_connection::PgConnectionConfig;
15 : use reqwest::{IntoUrl, Method};
16 : use thiserror::Error;
17 : use utils::{http::error::HttpErrorBody, id::NodeId};
18 :
19 : use crate::{
20 : background_process,
21 : local_env::{LocalEnv, SafekeeperConf},
22 : };
23 :
24 0 : #[derive(Error, Debug)]
25 : pub enum SafekeeperHttpError {
26 : #[error("Reqwest error: {0}")]
27 : Transport(#[from] reqwest::Error),
28 :
29 : #[error("Error: {0}")]
30 : Response(String),
31 : }
32 :
33 : type Result<T> = result::Result<T, SafekeeperHttpError>;
34 :
35 : #[async_trait::async_trait]
36 : pub trait ResponseErrorMessageExt: Sized {
37 : async fn error_from_body(self) -> Result<Self>;
38 : }
39 :
40 : #[async_trait::async_trait]
41 : impl ResponseErrorMessageExt for reqwest::Response {
42 508 : async fn error_from_body(self) -> Result<Self> {
43 508 : let status = self.status();
44 508 : if !(status.is_client_error() || status.is_server_error()) {
45 508 : return Ok(self);
46 0 : }
47 0 :
48 0 : // reqwest does not export its error construction utility functions, so let's craft the message ourselves
49 0 : let url = self.url().to_owned();
50 0 : Err(SafekeeperHttpError::Response(
51 0 : match self.json::<HttpErrorBody>().await {
52 0 : Ok(err_body) => format!("Error: {}", err_body.msg),
53 0 : Err(_) => format!("Http error ({}) at {}.", status.as_u16(), url),
54 : },
55 : ))
56 1524 : }
57 : }
58 :
59 : //
60 : // Control routines for safekeeper.
61 : //
62 : // Used in CLI and tests.
63 : //
64 0 : #[derive(Debug)]
65 : pub struct SafekeeperNode {
66 : pub id: NodeId,
67 :
68 : pub conf: SafekeeperConf,
69 :
70 : pub pg_connection_config: PgConnectionConfig,
71 : pub env: LocalEnv,
72 : pub http_client: reqwest::Client,
73 : pub http_base_url: String,
74 : }
75 :
76 : impl SafekeeperNode {
77 1055 : pub fn from_env(env: &LocalEnv, conf: &SafekeeperConf) -> SafekeeperNode {
78 1055 : SafekeeperNode {
79 1055 : id: conf.id,
80 1055 : conf: conf.clone(),
81 1055 : pg_connection_config: Self::safekeeper_connection_config(conf.pg_port),
82 1055 : env: env.clone(),
83 1055 : http_client: reqwest::Client::new(),
84 1055 : http_base_url: format!("http://127.0.0.1:{}/v1", conf.http_port),
85 1055 : }
86 1055 : }
87 :
88 : /// Construct libpq connection string for connecting to this safekeeper.
89 1055 : fn safekeeper_connection_config(port: u16) -> PgConnectionConfig {
90 1055 : PgConnectionConfig::new_host_port(url::Host::parse("127.0.0.1").unwrap(), port)
91 1055 : }
92 :
93 2496 : pub fn datadir_path_by_id(env: &LocalEnv, sk_id: NodeId) -> PathBuf {
94 2496 : env.safekeeper_data_dir(&format!("sk{sk_id}"))
95 2496 : }
96 :
97 2071 : pub fn datadir_path(&self) -> PathBuf {
98 2071 : SafekeeperNode::datadir_path_by_id(&self.env, self.id)
99 2071 : }
100 :
101 1055 : pub fn pid_file(&self) -> Utf8PathBuf {
102 1055 : Utf8PathBuf::from_path_buf(self.datadir_path().join("safekeeper.pid"))
103 1055 : .expect("non-Unicode path")
104 1055 : }
105 :
106 508 : pub async fn start(&self, extra_opts: Vec<String>) -> anyhow::Result<()> {
107 508 : print!(
108 508 : "Starting safekeeper at '{}' in '{}'",
109 508 : self.pg_connection_config.raw_address(),
110 508 : self.datadir_path().display()
111 508 : );
112 508 : io::stdout().flush().unwrap();
113 508 :
114 508 : let listen_pg = format!("127.0.0.1:{}", self.conf.pg_port);
115 508 : let listen_http = format!("127.0.0.1:{}", self.conf.http_port);
116 508 : let id = self.id;
117 508 : let datadir = self.datadir_path();
118 508 :
119 508 : let id_string = id.to_string();
120 508 : // TODO: add availability_zone to the config.
121 508 : // Right now we just specify any value here and use it to check metrics in tests.
122 508 : let availability_zone = format!("sk-{}", id_string);
123 :
124 508 : let mut args = vec![
125 508 : "-D".to_owned(),
126 508 : datadir
127 508 : .to_str()
128 508 : .with_context(|| {
129 0 : format!("Datadir path {datadir:?} cannot be represented as a unicode string")
130 508 : })?
131 508 : .to_owned(),
132 508 : "--id".to_owned(),
133 508 : id_string,
134 508 : "--listen-pg".to_owned(),
135 508 : listen_pg,
136 508 : "--listen-http".to_owned(),
137 508 : listen_http,
138 508 : "--availability-zone".to_owned(),
139 508 : availability_zone,
140 : ];
141 508 : if let Some(pg_tenant_only_port) = self.conf.pg_tenant_only_port {
142 508 : let listen_pg_tenant_only = format!("127.0.0.1:{}", pg_tenant_only_port);
143 508 : args.extend(["--listen-pg-tenant-only".to_owned(), listen_pg_tenant_only]);
144 508 : }
145 508 : if !self.conf.sync {
146 508 : args.push("--no-sync".to_owned());
147 508 : }
148 :
149 508 : let broker_endpoint = format!("{}", self.env.broker.client_url());
150 508 : args.extend(["--broker-endpoint".to_owned(), broker_endpoint]);
151 508 :
152 508 : let mut backup_threads = String::new();
153 508 : if let Some(threads) = self.conf.backup_threads {
154 0 : backup_threads = threads.to_string();
155 0 : args.extend(["--backup-threads".to_owned(), backup_threads]);
156 508 : } else {
157 508 : drop(backup_threads);
158 508 : }
159 :
160 508 : if let Some(ref remote_storage) = self.conf.remote_storage {
161 25 : args.extend(["--remote-storage".to_owned(), remote_storage.clone()]);
162 483 : }
163 :
164 508 : let key_path = self.env.base_data_dir.join("auth_public_key.pem");
165 508 : if self.conf.auth_enabled {
166 22 : let key_path_string = key_path
167 22 : .to_str()
168 22 : .with_context(|| {
169 0 : format!("Key path {key_path:?} cannot be represented as a unicode string")
170 22 : })?
171 22 : .to_owned();
172 22 : args.extend([
173 22 : "--pg-auth-public-key-path".to_owned(),
174 22 : key_path_string.clone(),
175 22 : ]);
176 22 : args.extend([
177 22 : "--pg-tenant-only-auth-public-key-path".to_owned(),
178 22 : key_path_string.clone(),
179 22 : ]);
180 22 : args.extend([
181 22 : "--http-auth-public-key-path".to_owned(),
182 22 : key_path_string.clone(),
183 22 : ]);
184 486 : }
185 :
186 508 : args.extend(extra_opts);
187 508 :
188 508 : background_process::start_process(
189 508 : &format!("safekeeper-{id}"),
190 508 : &datadir,
191 508 : &self.env.safekeeper_bin(),
192 508 : &args,
193 508 : [],
194 508 : background_process::InitialPidFile::Expect(self.pid_file()),
195 1025 : || async {
196 2041 : match self.check_status().await {
197 508 : Ok(()) => Ok(true),
198 517 : Err(SafekeeperHttpError::Transport(_)) => Ok(false),
199 0 : Err(e) => Err(anyhow::anyhow!("Failed to check node status: {e}")),
200 : }
201 2050 : },
202 508 : )
203 2041 : .await
204 508 : }
205 :
206 : ///
207 : /// Stop the server.
208 : ///
209 : /// If 'immediate' is true, we use SIGQUIT, killing the process immediately.
210 : /// Otherwise we use SIGTERM, triggering a clean shutdown
211 : ///
212 : /// If the server is not running, returns success
213 : ///
214 547 : pub fn stop(&self, immediate: bool) -> anyhow::Result<()> {
215 547 : background_process::stop_process(
216 547 : immediate,
217 547 : &format!("safekeeper {}", self.id),
218 547 : &self.pid_file(),
219 547 : )
220 547 : }
221 :
222 1025 : fn http_request<U: IntoUrl>(&self, method: Method, url: U) -> reqwest::RequestBuilder {
223 1025 : // TODO: authentication
224 1025 : //if self.env.auth_type == AuthType::NeonJWT {
225 1025 : // builder = builder.bearer_auth(&self.env.safekeeper_auth_token)
226 1025 : //}
227 1025 : self.http_client.request(method, url)
228 1025 : }
229 :
230 1025 : pub async fn check_status(&self) -> Result<()> {
231 1025 : self.http_request(Method::GET, format!("{}/{}", self.http_base_url, "status"))
232 1025 : .send()
233 2041 : .await?
234 508 : .error_from_body()
235 0 : .await?;
236 508 : Ok(())
237 1025 : }
238 : }
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