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|
//! Contains type and functions related to Garage configuration file
use std::io::Read;
use std::net::SocketAddr;
use std::path::PathBuf;
use serde::de::Error as SerdeError;
use serde::{de, Deserialize};
use netapp::util::parse_and_resolve_peer_addr;
use netapp::NodeID;
use crate::error::Error;
/// Represent the whole configuration
#[derive(Deserialize, Debug, Clone)]
pub struct Config {
/// Path where to store metadata. Should be fast, but low volume
pub metadata_dir: PathBuf,
/// Path where to store data. Can be slower, but need higher volume
pub data_dir: PathBuf,
/// Size of data blocks to save to disk
#[serde(default = "default_block_size")]
pub block_size: usize,
/// Replication mode. Supported values:
/// - none, 1 -> no replication
/// - 2 -> 2-way replication
/// - 3 -> 3-way replication
// (we can add more aliases for this later)
pub replication_mode: String,
/// Zstd compression level used on data blocks
#[serde(
deserialize_with = "deserialize_compression",
default = "default_compression"
)]
pub compression_level: Option<i32>,
/// RPC secret key: 32 bytes hex encoded
pub rpc_secret: String,
/// Address to bind for RPC
pub rpc_bind_addr: SocketAddr,
/// Public IP address of this node
pub rpc_public_addr: Option<SocketAddr>,
/// Bootstrap peers RPC address
#[serde(deserialize_with = "deserialize_vec_addr", default)]
pub bootstrap_peers: Vec<(NodeID, SocketAddr)>,
/// Consul host to connect to to discover more peers
pub consul_host: Option<String>,
/// Consul service name to use
pub consul_service_name: Option<String>,
/// Sled cache size, in bytes
#[serde(default = "default_sled_cache_capacity")]
pub sled_cache_capacity: u64,
/// Sled flush interval in milliseconds
#[serde(default = "default_sled_flush_every_ms")]
pub sled_flush_every_ms: u64,
/// Configuration for S3 api
pub s3_api: ApiConfig,
/// Configuration for serving files as normal web server
pub s3_web: WebConfig,
}
/// Configuration for S3 api
#[derive(Deserialize, Debug, Clone)]
pub struct ApiConfig {
/// Address and port to bind for api serving
pub api_bind_addr: SocketAddr,
/// S3 region to use
pub s3_region: String,
/// Suffix to remove from domain name to find bucket. If None,
/// vhost-style S3 request are disabled
pub root_domain: Option<String>,
}
/// Configuration for serving files as normal web server
#[derive(Deserialize, Debug, Clone)]
pub struct WebConfig {
/// Address and port to bind for web serving
pub bind_addr: SocketAddr,
/// Suffix to remove from domain name to find bucket
pub root_domain: String,
/// Suffix to add when user-agent request path end with "/"
pub index: String,
}
fn default_sled_cache_capacity() -> u64 {
128 * 1024 * 1024
}
fn default_sled_flush_every_ms() -> u64 {
2000
}
fn default_block_size() -> usize {
1048576
}
/// Read and parse configuration
pub 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 deserialize_vec_addr<'de, D>(deserializer: D) -> Result<Vec<(NodeID, SocketAddr)>, D::Error>
where
D: de::Deserializer<'de>,
{
let mut ret = vec![];
for peer in <Vec<&str>>::deserialize(deserializer)? {
let (pubkey, addrs) = parse_and_resolve_peer_addr(peer).ok_or_else(|| {
D::Error::custom(format!("Unable to parse or resolve peer: {}", peer))
})?;
for ip in addrs {
ret.push((pubkey, ip));
}
}
Ok(ret)
}
fn default_compression() -> Option<i32> {
Some(1)
}
fn deserialize_compression<'de, D>(deserializer: D) -> Result<Option<i32>, D::Error>
where
D: de::Deserializer<'de>,
{
use std::convert::TryFrom;
struct OptionVisitor;
impl<'de> serde::de::Visitor<'de> for OptionVisitor {
type Value = Option<i32>;
fn expecting(&self, formatter: &mut std::fmt::Formatter) -> std::fmt::Result {
formatter.write_str("int or 'none'")
}
fn visit_str<E>(self, value: &str) -> Result<Self::Value, E>
where
E: de::Error,
{
if value.eq_ignore_ascii_case("none") {
Ok(None)
} else {
Err(E::custom(format!(
"Invalid compression level: '{}', should be a number, or 'none'",
value
)))
}
}
fn visit_i64<E>(self, v: i64) -> Result<Self::Value, E>
where
E: de::Error,
{
i32::try_from(v)
.map(Some)
.map_err(|_| E::custom("Compression level out of bound".to_owned()))
}
fn visit_u64<E>(self, v: u64) -> Result<Self::Value, E>
where
E: de::Error,
{
i32::try_from(v)
.map(Some)
.map_err(|_| E::custom("Compression level out of bound".to_owned()))
}
}
deserializer.deserialize_any(OptionVisitor)
}
|
