aboutsummaryrefslogtreecommitdiff
path: root/src/server.rs
blob: 287b4386e15d8a5f507ce66240d0f822b059d959 (plain) (blame)
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
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
pub use futures_util::future::FutureExt;
use serde::Deserialize;
use std::collections::HashMap;
use std::io::{Read, Write};
use std::net::SocketAddr;
use std::path::PathBuf;
use std::sync::Arc;
use tokio::sync::watch;

use crate::api_server;
use crate::background::*;
use crate::block::*;
use crate::data::*;
use crate::error::Error;
use crate::membership::System;
use crate::proto::*;
use crate::rpc_server;
use crate::table::*;

#[derive(Deserialize, Debug, Clone)]
pub struct Config {
	pub metadata_dir: PathBuf,
	pub data_dir: PathBuf,

	pub api_port: u16,
	pub rpc_port: u16,

	pub bootstrap_peers: Vec<SocketAddr>,

	#[serde(default = "default_block_size")]
	pub block_size: usize,

	#[serde(default = "default_replication_factor")]
	pub meta_replication_factor: usize,

	#[serde(default = "default_replication_factor")]
	pub data_replication_factor: usize,

	pub rpc_tls: Option<TlsConfig>,
}

#[derive(Deserialize, Debug, Clone)]
pub struct TlsConfig {
	pub ca_cert: String,
	pub node_cert: String,
	pub node_key: String,
}

pub struct Garage {
	pub db: sled::Db,
	pub background: Arc<BackgroundRunner>,
	pub system: Arc<System>,
	pub block_manager: Arc<BlockManager>,

	pub table_rpc_handlers: HashMap<String, Box<dyn TableRpcHandler + Sync + Send>>,

	pub object_table: Arc<Table<ObjectTable>>,
	pub version_table: Arc<Table<VersionTable>>,
	pub block_ref_table: Arc<Table<BlockRefTable>>,
}

impl Garage {
	pub async fn new(
		config: Config,
		id: UUID,
		db: sled::Db,
		background: Arc<BackgroundRunner>,
	) -> Arc<Self> {
		let system = Arc::new(System::new(config.clone(), id, background.clone()));

		let block_manager = BlockManager::new(&db, config.data_dir.clone(), system.clone()).await;

		let data_rep_param = TableReplicationParams {
			replication_factor: system.config.data_replication_factor,
			write_quorum: (system.config.data_replication_factor + 1) / 2,
			read_quorum: 1,
			timeout: DEFAULT_TIMEOUT,
		};

		let meta_rep_param = TableReplicationParams {
			replication_factor: system.config.meta_replication_factor,
			write_quorum: (system.config.meta_replication_factor + 1) / 2,
			read_quorum: (system.config.meta_replication_factor + 1) / 2,
			timeout: DEFAULT_TIMEOUT,
		};

		let block_ref_table = Table::new(
			BlockRefTable {
				background: background.clone(),
				block_manager: block_manager.clone(),
			},
			system.clone(),
			&db,
			"block_ref".to_string(),
			data_rep_param.clone(),
		)
		.await;
		let version_table = Table::new(
			VersionTable {
				background: background.clone(),
				block_ref_table: block_ref_table.clone(),
			},
			system.clone(),
			&db,
			"version".to_string(),
			meta_rep_param.clone(),
		)
		.await;
		let object_table = Table::new(
			ObjectTable {
				background: background.clone(),
				version_table: version_table.clone(),
			},
			system.clone(),
			&db,
			"object".to_string(),
			meta_rep_param.clone(),
		)
		.await;

		let mut garage = Self {
			db,
			system: system.clone(),
			block_manager,
			background,
			table_rpc_handlers: HashMap::new(),
			object_table,
			version_table,
			block_ref_table,
		};

		garage.table_rpc_handlers.insert(
			garage.object_table.name.clone(),
			garage.object_table.clone().rpc_handler(),
		);
		garage.table_rpc_handlers.insert(
			garage.version_table.name.clone(),
			garage.version_table.clone().rpc_handler(),
		);
		garage.table_rpc_handlers.insert(
			garage.block_ref_table.name.clone(),
			garage.block_ref_table.clone().rpc_handler(),
		);

		Arc::new(garage)
	}
}

fn default_block_size() -> usize {
	1048576
}
fn default_replication_factor() -> usize {
	3
}

fn read_config(config_file: PathBuf) -> Result<Config, Error> {
	let mut file = std::fs::OpenOptions::new()
		.read(true)
		.open(config_file.as_path())?;

	let mut config = String::new();
	file.read_to_string(&mut config)?;

	Ok(toml::from_str(&config)?)
}

fn gen_node_id(metadata_dir: &PathBuf) -> Result<UUID, Error> {
	let mut id_file = metadata_dir.clone();
	id_file.push("node_id");
	if id_file.as_path().exists() {
		let mut f = std::fs::File::open(id_file.as_path())?;
		let mut d = vec![];
		f.read_to_end(&mut d)?;
		if d.len() != 32 {
			return Err(Error::Message(format!("Corrupt node_id file")));
		}

		let mut id = [0u8; 32];
		id.copy_from_slice(&d[..]);
		Ok(id.into())
	} else {
		let id = gen_uuid();

		let mut f = std::fs::File::create(id_file.as_path())?;
		f.write_all(id.as_slice())?;
		Ok(id)
	}
}

async fn shutdown_signal(send_cancel: watch::Sender<bool>) -> Result<(), Error> {
	// Wait for the CTRL+C signal
	tokio::signal::ctrl_c()
		.await
		.expect("failed to install CTRL+C signal handler");
	println!("Received CTRL+C, shutting down.");
	send_cancel.broadcast(true)?;
	Ok(())
}

async fn wait_from(mut chan: watch::Receiver<bool>) -> () {
	while let Some(exit_now) = chan.recv().await {
		if exit_now {
			return;
		}
	}
}

pub async fn run_server(config_file: PathBuf) -> Result<(), Error> {
	let config = read_config(config_file).expect("Unable to read config file");

	let mut db_path = config.metadata_dir.clone();
	db_path.push("db");
	let db = sled::open(db_path).expect("Unable to open DB");

	let id = gen_node_id(&config.metadata_dir).expect("Unable to read or generate node ID");
	println!("Node ID: {}", hex::encode(&id));

	let (send_cancel, watch_cancel) = watch::channel(false);

	let background = BackgroundRunner::new(8, watch_cancel.clone());
	let garage = Garage::new(config, id, db, background.clone()).await;

	let rpc_server = rpc_server::run_rpc_server(garage.clone(), wait_from(watch_cancel.clone()));
	let api_server = api_server::run_api_server(garage.clone(), wait_from(watch_cancel.clone()));

	futures::try_join!(
		garage.system.clone().bootstrap().map(Ok),
		rpc_server,
		api_server,
		background.run().map(Ok),
		shutdown_signal(send_cancel),
	)?;
	Ok(())
}