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Merge pull request 'Secrets can be passed directly in config, as file, or as env' (#499) from config-files-env into main

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Reviewed-on: Deuxfleurs/garage#499
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Alex 2023-02-06 14:18:58 +00:00
commit d14678e0ac
6 changed files with 157 additions and 82 deletions
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40
doc/book/reference-manual/configuration.md
View file

@ -3,6 +3,8 @@ title = "Configuration file format"
weight = 20
+++
## Full example
Here is an example `garage.toml` configuration file that illustrates all of the possible options:
```toml
@ -259,17 +261,17 @@ Compression is done synchronously, setting a value too high will add latency to
This value can be different between nodes, compression is done by the node which receive the
API call.
### `rpc_secret`
### `rpc_secret`, `rpc_secret_file` or `GARAGE_RPC_SECRET` (env)
Garage uses a secret key that is shared between all nodes of the cluster
in order to identify these nodes and allow them to communicate together.
This key should be specified here in the form of a 32-byte hex-encoded
random string. Such a string can be generated with a command
such as `openssl rand -hex 32`.
Garage uses a secret key, called an RPC secret, that is shared between all
nodes of the cluster in order to identify these nodes and allow them to
communicate together. The RPC secret is a 32-byte hex-encoded random string,
which can be generated with a command such as `openssl rand -hex 32`.
### `rpc_secret_file`
Like `rpc_secret` above, just that this is the path to a file that Garage will try to read the secret from.
The RPC secret should be specified in the `rpc_secret` configuration variable.
Since Garage `v0.8.2`, the RPC secret can also be stored in a file whose path is
given in the configuration variable `rpc_secret_file`, or specified as an
environment variable `GARAGE_RPC_SECRET`.
### `rpc_bind_addr`
@ -411,22 +413,28 @@ If specified, Garage will bind an HTTP server to this port and address, on
which it will listen to requests for administration features.
See [administration API reference](@/documentation/reference-manual/admin-api.md) to learn more about these features.
### `metrics_token` (since version 0.7.2)
### `metrics_token`, `metrics_token_file` or `GARAGE_METRICS_TOKEN` (env)
The token for accessing the Metrics endpoint. If this token is not set in
the config file, the Metrics endpoint can be accessed without access
control.
The token for accessing the Metrics endpoint. If this token is not set, the
Metrics endpoint can be accessed without access control.
You can use any random string for this value. We recommend generating a random token with `openssl rand -hex 32`.
### `admin_token` (since version 0.7.2)
`metrics_token` was introduced in Garage `v0.7.2`.
`metrics_token_file` and the `GARAGE_METRICS_TOKEN` environment variable are supported since Garage `v0.8.2`.
### `admin_token`, `admin_token_file` or `GARAGE_ADMIN_TOKEN` (env)
The token for accessing all of the other administration endpoints. If this
token is not set in the config file, access to these endpoints is disabled
entirely.
token is not set, access to these endpoints is disabled entirely.
You can use any random string for this value. We recommend generating a random token with `openssl rand -hex 32`.
`admin_token` was introduced in Garage `v0.7.2`.
`admin_token_file` and the `GARAGE_ADMIN_TOKEN` environment variable are supported since Garage `v0.8.2`.
### `trace_sink`
Optionally, the address of an OpenTelemetry collector. If specified,

46
src/garage/main.rs
View file

@ -25,6 +25,7 @@ use structopt::StructOpt;
use netapp::util::parse_and_resolve_peer_addr;
use netapp::NetworkKey;
use garage_util::config::Config;
use garage_util::error::*;
use garage_rpc::system::*;
@ -46,11 +47,10 @@ struct Opt {
#[structopt(short = "h", long = "rpc-host", env = "GARAGE_RPC_HOST")]
pub rpc_host: Option<String>,
/// RPC secret network key for admin operations
#[structopt(short = "s", long = "rpc-secret", env = "GARAGE_RPC_SECRET")]
pub rpc_secret: Option<String>,
#[structopt(flatten)]
pub secrets: Secrets,
/// Configuration file (garage.toml)
/// Path to configuration file
#[structopt(
short = "c",
long = "config",
@ -63,6 +63,24 @@ struct Opt {
cmd: Command,
}
#[derive(StructOpt, Debug)]
pub struct Secrets {
/// RPC secret network key, used to replace rpc_secret in config.toml when running the
/// daemon or doing admin operations
#[structopt(short = "s", long = "rpc-secret", env = "GARAGE_RPC_SECRET")]
pub rpc_secret: Option<String>,
/// Metrics API authentication token, replaces admin.metrics_token in config.toml when
/// running the Garage daemon
#[structopt(long = "admin-token", env = "GARAGE_ADMIN_TOKEN")]
pub admin_token: Option<String>,
/// Metrics API authentication token, replaces admin.metrics_token in config.toml when
/// running the Garage daemon
#[structopt(long = "metrics-token", env = "GARAGE_METRICS_TOKEN")]
pub metrics_token: Option<String>,
}
#[tokio::main]
async fn main() {
// Initialize version and features info
@ -145,9 +163,9 @@ async fn main() {
sodiumoxide::init().expect("Unable to init sodiumoxide");
let res = match opt.cmd {
Command::Server => server::run_server(opt.config_file).await,
Command::Server => server::run_server(opt.config_file, opt.secrets).await,
Command::OfflineRepair(repair_opt) => {
repair::offline::offline_repair(opt.config_file, repair_opt).await
repair::offline::offline_repair(opt.config_file, opt.secrets, repair_opt).await
}
Command::Node(NodeOperation::NodeId(node_id_opt)) => {
node_id_command(opt.config_file, node_id_opt.quiet)
@ -162,7 +180,7 @@ async fn main() {
}
async fn cli_command(opt: Opt) -> Result<(), Error> {
let config = if opt.rpc_secret.is_none() || opt.rpc_host.is_none() {
let config = if opt.secrets.rpc_secret.is_none() || opt.rpc_host.is_none() {
Some(garage_util::config::read_config(opt.config_file.clone())
.err_context(format!("Unable to read configuration file {}. Configuration file is needed because -h or -s is not provided on the command line.", opt.config_file.to_string_lossy()))?)
} else {
@ -171,6 +189,7 @@ async fn cli_command(opt: Opt) -> Result<(), Error> {
// Find and parse network RPC secret
let net_key_hex_str = opt
.secrets
.rpc_secret
.as_ref()
.or_else(|| config.as_ref().and_then(|c| c.rpc_secret.as_ref()))
@ -230,3 +249,16 @@ async fn cli_command(opt: Opt) -> Result<(), Error> {
Ok(x) => Ok(x),
}
}
fn fill_secrets(mut config: Config, secrets: Secrets) -> Config {
if secrets.rpc_secret.is_some() {
config.rpc_secret = secrets.rpc_secret;
}
if secrets.admin_token.is_some() {
config.admin.admin_token = secrets.admin_token;
}
if secrets.metrics_token.is_some() {
config.admin.metrics_token = secrets.metrics_token;
}
config
}

9
src/garage/repair/offline.rs
View file

@ -6,8 +6,13 @@ use garage_util::error::*;
use garage_model::garage::Garage;
use crate::cli::structs::*;
use crate::{fill_secrets, Secrets};
pub async fn offline_repair(config_file: PathBuf, opt: OfflineRepairOpt) -> Result<(), Error> {
pub async fn offline_repair(
config_file: PathBuf,
secrets: Secrets,
opt: OfflineRepairOpt,
) -> Result<(), Error> {
if !opt.yes {
return Err(Error::Message(
"Please add the --yes flag to launch repair operation".into(),
@ -15,7 +20,7 @@ pub async fn offline_repair(config_file: PathBuf, opt: OfflineRepairOpt) -> Resu
}
info!("Loading configuration...");
let config = read_config(config_file)?;
let config = fill_secrets(read_config(config_file)?, secrets);
info!("Initializing Garage main data store...");
let garage = Garage::new(config)?;

5
src/garage/server.rs
View file

@ -17,6 +17,7 @@ use garage_api::k2v::api_server::K2VApiServer;
use crate::admin::*;
#[cfg(feature = "telemetry-otlp")]
use crate::tracing_setup::*;
use crate::{fill_secrets, Secrets};
async fn wait_from(mut chan: watch::Receiver<bool>) {
while !*chan.borrow() {
@ -26,9 +27,9 @@ async fn wait_from(mut chan: watch::Receiver<bool>) {
}
}
pub async fn run_server(config_file: PathBuf) -> Result<(), Error> {
pub async fn run_server(config_file: PathBuf, secrets: Secrets) -> Result<(), Error> {
info!("Loading configuration...");
let config = read_config(config_file)?;
let config = fill_secrets(read_config(config_file)?, secrets);
// ---- Initialize Garage internals ----

23
src/model/garage.rs
View file

@ -98,7 +98,7 @@ impl Garage {
.cache_capacity(config.sled_cache_capacity)
.flush_every_ms(Some(config.sled_flush_every_ms))
.open()
.expect("Unable to open sled DB");
.ok_or_message("Unable to open sled DB")?;
db::sled_adapter::SledDb::init(db)
}
#[cfg(not(feature = "sled"))]
@ -109,7 +109,7 @@ impl Garage {
db_path.push("db.sqlite");
info!("Opening Sqlite database at: {}", db_path.display());
let db = db::sqlite_adapter::rusqlite::Connection::open(db_path)
.expect("Unable to open sqlite DB");
.ok_or_message("Unable to open sqlite DB")?;
db::sqlite_adapter::SqliteDb::init(db)
}
#[cfg(not(feature = "sqlite"))]
@ -123,7 +123,8 @@ impl Garage {
"lmdb" | "heed" => {
db_path.push("db.lmdb");
info!("Opening LMDB database at: {}", db_path.display());
std::fs::create_dir_all(&db_path).expect("Unable to create LMDB data directory");
std::fs::create_dir_all(&db_path)
.ok_or_message("Unable to create LMDB data directory")?;
let map_size = garage_db::lmdb_adapter::recommended_map_size();
use db::lmdb_adapter::heed;
@ -135,7 +136,9 @@ impl Garage {
env_builder.flag(heed::flags::Flags::MdbNoSync);
env_builder.flag(heed::flags::Flags::MdbNoMetaSync);
}
let db = env_builder.open(&db_path).expect("Unable to open LMDB DB");
let db = env_builder
.open(&db_path)
.ok_or_message("Unable to open LMDB DB")?;
db::lmdb_adapter::LmdbDb::init(db)
}
#[cfg(not(feature = "lmdb"))]
@ -158,13 +161,15 @@ impl Garage {
}
};
let network_key = NetworkKey::from_slice(
&hex::decode(config.rpc_secret.as_ref().unwrap()).expect("Invalid RPC secret key")[..],
)
.expect("Invalid RPC secret key");
let network_key = hex::decode(config.rpc_secret.as_ref().ok_or_message(
"rpc_secret value is missing, not present in config file or in environment",
)?)
.ok()
.and_then(|x| NetworkKey::from_slice(&x))
.ok_or_message("Invalid RPC secret key")?;
let replication_mode = ReplicationMode::parse(&config.replication_mode)
.expect("Invalid replication_mode in config file.");
.ok_or_message("Invalid replication_mode in config file.")?;
info!("Initialize membership management system...");
let system = System::new(network_key, replication_mode, &config)?;

114
src/util/config.rs
View file

@ -34,9 +34,7 @@ pub struct Config {
pub compression_level: Option<i32>,
/// RPC secret key: 32 bytes hex encoded
/// Note: When using `read_config` this should never be `None`
pub rpc_secret: Option<String>,
/// Optional file where RPC secret key is read from
pub rpc_secret_file: Option<String>,
@ -122,10 +120,17 @@ pub struct WebConfig {
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>,
/// File to read metrics token from
pub metrics_token_file: Option<String>,
/// Bearer token to use to access Admin API endpoints
pub admin_token: Option<String>,
/// File to read admin token from
pub admin_token_file: Option<String>,
/// OTLP server to where to export traces
pub trace_sink: Option<String>,
}
@ -183,29 +188,55 @@ pub fn read_config(config_file: PathBuf) -> Result<Config, Error> {
let mut parsed_config: Config = toml::from_str(&config)?;
match (&parsed_config.rpc_secret, &parsed_config.rpc_secret_file) {
(Some(_), None) => {
secret_from_file(
&mut parsed_config.rpc_secret,
&parsed_config.rpc_secret_file,
"rpc_secret",
)?;
secret_from_file(
&mut parsed_config.admin.metrics_token,
&parsed_config.admin.metrics_token_file,
"admin.metrics_token",
)?;
secret_from_file(
&mut parsed_config.admin.admin_token,
&parsed_config.admin.admin_token_file,
"admin.admin_token",
)?;
Ok(parsed_config)
}
fn secret_from_file(
secret: &mut Option<String>,
secret_file: &Option<String>,
name: &'static str,
) -> Result<(), Error> {
match (&secret, &secret_file) {
(_, None) => {
// no-op
}
(Some(_), Some(_)) => {
return Err("only one of `rpc_secret` and `rpc_secret_file` can be set".into())
return Err(format!("only one of `{}` and `{}_file` can be set", name, name).into());
}
(None, Some(rpc_secret_file_path_string)) => {
let mut rpc_secret_file = std::fs::OpenOptions::new()
.read(true)
.open(rpc_secret_file_path_string)?;
let mut rpc_secret_from_file = String::new();
rpc_secret_file.read_to_string(&mut rpc_secret_from_file)?;
(None, Some(file_path)) => {
#[cfg(unix)]
if std::env::var("GARAGE_ALLOW_WORLD_READABLE_SECRETS").as_deref() != Ok("true") {
use std::os::unix::fs::MetadataExt;
let metadata = std::fs::metadata(&file_path)?;
if metadata.mode() & 0o077 != 0 {
return Err(format!("File {} is world-readable! (mode: 0{:o}, expected 0600)\nRefusing to start until this is fixed, or environment variable GARAGE_ALLOW_WORLD_READABLE_SECRETS is set to true.", file_path, metadata.mode()).into());
}
}
let mut file = std::fs::OpenOptions::new().read(true).open(file_path)?;
let mut secret_buf = String::new();
file.read_to_string(&mut secret_buf)?;
// trim_end: allows for use case such as `echo "$(openssl rand -hex 32)" > somefile`.
// also editors sometimes add a trailing newline
parsed_config.rpc_secret = Some(String::from(rpc_secret_from_file.trim_end()));
*secret = Some(String::from(secret_buf.trim_end()));
}
(None, None) => {
return Err("either `rpc_secret` or `rpc_secret_file` needs to be set".into())
}
};
Ok(parsed_config)
Ok(())
}
fn default_compression() -> Option<i32> {
@ -269,31 +300,7 @@ mod tests {
use std::io::Write;
#[test]
fn test_rpc_secret_is_required() -> Result<(), Error> {
let path1 = mktemp::Temp::new_file()?;
let mut file1 = File::create(path1.as_path())?;
writeln!(
file1,
r#"
metadata_dir = "/tmp/garage/meta"
data_dir = "/tmp/garage/data"
replication_mode = "3"
rpc_bind_addr = "[::]:3901"
[s3_api]
s3_region = "garage"
api_bind_addr = "[::]:3900"
"#
)?;
assert_eq!(
"either `rpc_secret` or `rpc_secret_file` needs to be set",
super::read_config(path1.to_path_buf())
.unwrap_err()
.to_string()
);
drop(path1);
drop(file1);
fn test_rpc_secret() -> Result<(), Error> {
let path2 = mktemp::Temp::new_file()?;
let mut file2 = File::create(path2.as_path())?;
writeln!(
@ -328,7 +335,7 @@ mod tests {
let path_config = mktemp::Temp::new_file()?;
let mut file_config = File::create(path_config.as_path())?;
let path_secret_path = path_secret.as_path().display();
let path_secret_path = path_secret.as_path();
writeln!(
file_config,
r#"
@ -336,15 +343,32 @@ mod tests {
data_dir = "/tmp/garage/data"
replication_mode = "3"
rpc_bind_addr = "[::]:3901"
rpc_secret_file = "{path_secret_path}"
rpc_secret_file = "{}"
[s3_api]
s3_region = "garage"
api_bind_addr = "[::]:3900"
"#
"#,
path_secret_path.display()
)?;
let config = super::read_config(path_config.to_path_buf())?;
assert_eq!("foo", config.rpc_secret.unwrap());
#[cfg(unix)]
{
use std::os::unix::fs::PermissionsExt;
let metadata = std::fs::metadata(&path_secret_path)?;
let mut perm = metadata.permissions();
perm.set_mode(0o660);
std::fs::set_permissions(&path_secret_path, perm)?;
std::env::set_var("GARAGE_ALLOW_WORLD_READABLE_SECRETS", "false");
assert!(super::read_config(path_config.to_path_buf()).is_err());
std::env::set_var("GARAGE_ALLOW_WORLD_READABLE_SECRETS", "true");
assert!(super::read_config(path_config.to_path_buf()).is_ok());
}
drop(path_config);
drop(path_secret);
drop(file_config);