//! Contains type and functions related to Garage configuration file use std::io::Read; use std::net::SocketAddr; use std::path::PathBuf; use serde::{de, Deserialize}; 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<String>, /// Timeout for Netapp's ping messagess pub rpc_ping_timeout_msec: Option<u64>, /// Timeout for Netapp RPC calls pub rpc_timeout_msec: Option<u64>, /// Bootstrap peers RPC address #[serde(default)] pub bootstrap_peers: Vec<String>, /// 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>, /// Kubernetes namespace the service discovery resources are be created in pub kubernetes_namespace: Option<String>, /// Service name to filter for in k8s custom resources pub kubernetes_service_name: Option<String>, /// Skip creation of the garagenodes CRD #[serde(default)] pub kubernetes_skip_crd: bool, // -- DB /// Database engine to use for metadata (options: sled, sqlite, lmdb) #[serde(default = "default_db_engine")] pub db_engine: 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, // -- APIs /// Configuration for S3 api pub s3_api: S3ApiConfig, /// Configuration for K2V api pub k2v_api: Option<K2VApiConfig>, /// Configuration for serving files as normal web server pub s3_web: Option<WebConfig>, /// Configuration for the admin API endpoint #[serde(default = "Default::default")] pub admin: AdminConfig, } /// Configuration for S3 api #[derive(Deserialize, Debug, Clone)] pub struct S3ApiConfig { /// Address and port to bind for api serving pub api_bind_addr: Option<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 K2V api #[derive(Deserialize, Debug, Clone)] pub struct K2VApiConfig { /// Address and port to bind for api serving pub api_bind_addr: SocketAddr, } /// 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, } /// Configuration for the admin and monitoring HTTP API #[derive(Deserialize, Debug, Clone, Default)] pub struct AdminConfig { /// Address and port to bind for admin API serving pub api_bind_addr: Option<SocketAddr>, /// Bearer token to use to scrape metrics pub metrics_token: Option<String>, /// Bearer token to use to access Admin API endpoints pub admin_token: Option<String>, /// OTLP server to where to export traces pub trace_sink: Option<String>, } fn default_db_engine() -> String { "sled".into() } 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 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) }