aboutsummaryrefslogtreecommitdiff
path: root/src/server.rs
blob: 3df6ca593f88e44c37b2fe71862e37bbed3bc9df (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
use futures::channel::oneshot;
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::{Mutex, RwLock};

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

pub struct Garage {
	pub db: sled::Db,
	pub system: Arc<System>,
	pub fs_lock: Mutex<()>,

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

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

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

		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 object_table = Arc::new(Table::new(
			ObjectTable {
				garage: RwLock::new(None),
			},
			system.clone(),
			&db,
			"object".to_string(),
			meta_rep_param.clone(),
		));
		let version_table = Arc::new(Table::new(
			VersionTable {
				garage: RwLock::new(None),
			},
			system.clone(),
			&db,
			"version".to_string(),
			meta_rep_param.clone(),
		));

		let mut garage = Self {
			db,
			system: system.clone(),
			fs_lock: Mutex::new(()),
			table_rpc_handlers: HashMap::new(),
			object_table,
			version_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(),
		);

		let garage = Arc::new(garage);

		*garage.object_table.instance.garage.write().await = Some(garage.clone());
		*garage.version_table.instance.garage.write().await = Some(garage.clone());

		garage
	}
}

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

#[derive(Deserialize, Debug)]
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_meta_replication_factor")]
	pub meta_replication_factor: usize,
}

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(chans: Vec<oneshot::Sender<()>>) {
	// 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.");
	for ch in chans {
		ch.send(()).unwrap();
	}
}

async fn wait_from(chan: oneshot::Receiver<()>) -> () {
	chan.await.unwrap()
}

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 garage = Garage::new(config, id, db).await;

	let (tx1, rx1) = oneshot::channel();
	let (tx2, rx2) = oneshot::channel();

	let rpc_server = rpc_server::run_rpc_server(garage.clone(), wait_from(rx1));
	let api_server = api_server::run_api_server(garage.clone(), wait_from(rx2));

	tokio::spawn(shutdown_signal(vec![tx1, tx2]));
	tokio::spawn(garage.system.clone().bootstrap());

	futures::try_join!(rpc_server, api_server)?;
	Ok(())
}