First commit: skeleton for something great

12 files changed, 2023 insertions, 0 deletions

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diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 00000000..8b170a3a
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,23 @@
+[package]
+name = "garage"
+version = "0.1.0"
+authors = ["Alex Auvolat <alex@adnab.me>"]
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+bytes = "0.4"
+http = "0.2"
+hyper = "0.13.4"
+kv = "0.20.2"
+futures = "0.3"
+futures-core = "0.3"
+futures-channel = "0.3"
+futures-util = "0.3"
+tokio = { version = "0.2", features = ["full"] }
+serde = { version = "1.0", features = ["derive"] }
+bincode = "1.2.1"
+err-derive = "0.2.3"
+rmp-serde = "0.14.3"
+structopt = { version = "0.3", default-features = false }
diff --git a/LICENSE b/LICENSE
new file mode 100644
index 00000000..53d1f3d0
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,675 @@
+                    GNU GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+                            Preamble
+
+  The GNU General Public License is a free, copyleft license for
+software and other kinds of works.
+
+  The licenses for most software and other practical works are designed
+to take away your freedom to share and change the works.  By contrast,
+the GNU General Public License is intended to guarantee your freedom to
+share and change all versions of a program--to make sure it remains free
+software for all its users.  We, the Free Software Foundation, use the
+GNU General Public License for most of our software; it applies also to
+any other work released this way by its authors.  You can apply it to
+your programs, too.
+
+  When we speak of free software, we are referring to freedom, not
+price.  Our General Public Licenses are designed to make sure that you
+have the freedom to distribute copies of free software (and charge for
+them if you wish), that you receive source code or can get it if you
+want it, that you can change the software or use pieces of it in new
+free programs, and that you know you can do these things.
+
+  To protect your rights, we need to prevent others from denying you
+these rights or asking you to surrender the rights.  Therefore, you have
+certain responsibilities if you distribute copies of the software, or if
+you modify it: responsibilities to respect the freedom of others.
+
+  For example, if you distribute copies of such a program, whether
+gratis or for a fee, you must pass on to the recipients the same
+freedoms that you received.  You must make sure that they, too, receive
+or can get the source code.  And you must show them these terms so they
+know their rights.
+
+  Developers that use the GNU GPL protect your rights with two steps:
+(1) assert copyright on the software, and (2) offer you this License
+giving you legal permission to copy, distribute and/or modify it.
+
+  For the developers' and authors' protection, the GPL clearly explains
+that there is no warranty for this free software.  For both users' and
+authors' sake, the GPL requires that modified versions be marked as
+changed, so that their problems will not be attributed erroneously to
+authors of previous versions.
+
+  Some devices are designed to deny users access to install or run
+modified versions of the software inside them, although the manufacturer
+can do so.  This is fundamentally incompatible with the aim of
+protecting users' freedom to change the software.  The systematic
+pattern of such abuse occurs in the area of products for individuals to
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+have designed this version of the GPL to prohibit the practice for those
+products.  If such problems arise substantially in other domains, we
+stand ready to extend this provision to those domains in future versions
+of the GPL, as needed to protect the freedom of users.
+
+  Finally, every program is threatened constantly by software patents.
+States should not allow patents to restrict development and use of
+software on general-purpose computers, but in those that do, we wish to
+avoid the special danger that patents applied to a free program could
+make it effectively proprietary.  To prevent this, the GPL assures that
+patents cannot be used to render the program non-free.
+
+  The precise terms and conditions for copying, distribution and
+modification follow.
+
+                       TERMS AND CONDITIONS
+
+  0. Definitions.
+
+  "This License" refers to version 3 of the GNU General Public License.
+
+  "Copyright" also means copyright-like laws that apply to other kinds of
+works, such as semiconductor masks.
+
+  "The Program" refers to any copyrightable work licensed under this
+License.  Each licensee is addressed as "you".  "Licensees" and
+"recipients" may be individuals or organizations.
+
+  To "modify" a work means to copy from or adapt all or part of the work
+in a fashion requiring copyright permission, other than the making of an
+exact copy.  The resulting work is called a "modified version" of the
+earlier work or a work "based on" the earlier work.
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+  "Additional permissions" are terms that supplement the terms of this
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+  When you convey a copy of a covered work, you may at your option
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+  10. Automatic Licensing of Downstream Recipients.
+
+  Each time you convey a covered work, the recipient automatically
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+any patent claim is infringed by making, using, selling, offering for
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+
+  11. Patents.
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+  A "contributor" is a copyright holder who authorizes use under this
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+
+  A patent license is "discriminatory" if it does not include within
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+
+  Nothing in this License shall be construed as excluding or limiting
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+
+  12. No Surrender of Others' Freedom.
+
+  If conditions are imposed on you (whether by court order, agreement or
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+the Program, the only way you could satisfy both those terms and this
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+
+  13. Use with the GNU Affero General Public License.
+
+  Notwithstanding any other provision of this License, you have
+permission to link or combine any covered work with a work licensed
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+
+  14. Revised Versions of this License.
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+  The Free Software Foundation may publish revised and/or new versions of
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+be similar in spirit to the present version, but may differ in detail to
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+  Each version is given a distinguishing version number.  If the
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+option of following the terms and conditions either of that numbered
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+Foundation.  If the Program does not specify a version number of the
+GNU General Public License, you may choose any version ever published
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+
+  If the Program specifies that a proxy can decide which future
+versions of the GNU General Public License can be used, that proxy's
+public statement of acceptance of a version permanently authorizes you
+to choose that version for the Program.
+
+  Later license versions may give you additional or different
+permissions.  However, no additional obligations are imposed on any
+author or copyright holder as a result of your choosing to follow a
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+  15. Disclaimer of Warranty.
+
+  THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
+APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
+HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
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+ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
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+  16. Limitation of Liability.
+
+  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
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+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
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+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
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+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+    <program>  Copyright (C) <year>  <name of author>
+    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<https://www.gnu.org/licenses/>.
+
+  The GNU General Public License does not permit incorporating your program
+into proprietary programs.  If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.  But first, please read
+<https://www.gnu.org/licenses/why-not-lgpl.html>.
+
diff --git a/Makefile b/Makefile
new file mode 100644
index 00000000..ab8a74a0
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,2 @@
+all:
+	cargo build
diff --git a/README.md b/README.md
new file mode 100644
index 00000000..337fdb81
--- /dev/null
+++ b/README.md
@@ -0,0 +1,5 @@
+# Garage
+
+THIS IS ALL WORK IN PROGRESS. NOTHING TO SEE YET BUT THANKS FOR YOUR INTEREST.
+
+Garage implements an S3-compatible object store with high resiliency to network failures, machine failure, and sysadmin failure.
diff --git a/src/api.rs b/src/api.rs
new file mode 100644
index 00000000..9ee17047
--- /dev/null
+++ b/src/api.rs
@@ -0,0 +1,65 @@
+use futures_util::TryStreamExt;
+use hyper::service::{make_service_fn, service_fn};
+use hyper::{Body, Method, Request, Response, Server, StatusCode};
+use futures::future::Future;
+
+use crate::error::Error;
+use crate::System;
+
+/// This is our service handler. It receives a Request, routes on its
+/// path, and returns a Future of a Response.
+async fn echo(req: Request<Body>) -> Result<Response<Body>, Error> {
+    match (req.method(), req.uri().path()) {
+        // Serve some instructions at /
+        (&Method::GET, "/") => Ok(Response::new(Body::from(
+            "Try POSTing data to /echo such as: `curl localhost:3000/echo -XPOST -d 'hello world'`",
+        ))),
+
+        // Simply echo the body back to the client.
+        (&Method::POST, "/echo") => Ok(Response::new(req.into_body())),
+
+        // Convert to uppercase before sending back to client using a stream.
+        (&Method::POST, "/echo/uppercase") => {
+            let chunk_stream = req.into_body().map_ok(|chunk| {
+                chunk
+                    .iter()
+                    .map(|byte| byte.to_ascii_uppercase())
+                    .collect::<Vec<u8>>()
+            });
+            Ok(Response::new(Body::wrap_stream(chunk_stream)))
+        }
+
+        // Reverse the entire body before sending back to the client.
+        //
+        // Since we don't know the end yet, we can't simply stream
+        // the chunks as they arrive as we did with the above uppercase endpoint.
+        // So here we do `.await` on the future, waiting on concatenating the full body,
+        // then afterwards the content can be reversed. Only then can we return a `Response`.
+        (&Method::POST, "/echo/reversed") => {
+            let whole_body = hyper::body::to_bytes(req.into_body()).await?;
+
+            let reversed_body = whole_body.iter().rev().cloned().collect::<Vec<u8>>();
+            Ok(Response::new(Body::from(reversed_body)))
+        }
+
+        // Return the 404 Not Found for other routes.
+        _ => {
+            let mut not_found = Response::default();
+            *not_found.status_mut() = StatusCode::NOT_FOUND;
+            Ok(not_found)
+        }
+    }
+}
+
+pub async fn run_api_server(sys: &System, api_port: u16, shutdown_signal: impl Future<Output=()>) -> Result<(), hyper::Error> {
+    let addr = ([0, 0, 0, 0], api_port).into();
+
+    let service = make_service_fn(|_| async { Ok::<_, Error>(service_fn(echo)) });
+
+    let server = Server::bind(&addr).serve(service);
+
+	let graceful = server.with_graceful_shutdown(shutdown_signal);
+    println!("Listening on http://{}", addr);
+
+	graceful.await
+}
diff --git a/src/data.rs b/src/data.rs
new file mode 100644
index 00000000..651a9d45
--- /dev/null
+++ b/src/data.rs
@@ -0,0 +1,75 @@
+use std::net::SocketAddr;
+
+use serde::{Serialize, Deserialize};
+
+pub type UUID = [u8; 32];
+pub type Hash = [u8; 32];
+
+// Membership management
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct NodeStatus {
+	id: UUID,
+	time: u64,
+	addr: SocketAddr,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct NodeConfig {
+	id: UUID,
+	n_tokens: u32,
+}
+
+#[derive(Default, Debug, Clone, Serialize, Deserialize)]
+pub struct NetworkMembers {
+	pings: Vec<NodeStatus>,
+	desired_state: Vec<NodeConfig>,
+	desired_state_version: u64,
+}
+
+// Data management
+
+#[derive(Debug, Serialize, Deserialize)]
+pub struct SplitpointMeta {
+	bucket: String,
+	key: String,
+
+	timestamp: u64,
+	uuid: UUID,
+	deleted: bool,
+}
+
+#[derive(Debug, Serialize, Deserialize)]
+pub struct VersionMeta {
+	bucket: String,
+	key: String,
+
+	timestamp: u64,
+	uuid: UUID,
+	deleted: bool,
+
+	mime_type: String,
+	size: u64,
+	is_complete: bool,
+
+	data: VersionData,
+}
+
+#[derive(Debug, Serialize, Deserialize)]
+pub enum VersionData {
+	Inline(Vec<u8>),
+	FirstBlock(Hash),
+}
+
+#[derive(Debug, Serialize, Deserialize)]
+pub struct BlockMeta {
+	version_uuid: UUID,
+	offset: u64,
+	hash: Hash,
+}
+
+#[derive(Debug, Serialize, Deserialize)]
+pub struct BlockReverseMeta {
+	versions: Vec<UUID>,
+	deleted_versions: Vec<UUID>,
+}
diff --git a/src/error.rs b/src/error.rs
new file mode 100644
index 00000000..9929a896
--- /dev/null
+++ b/src/error.rs
@@ -0,0 +1,19 @@
+use err_derive::Error;
+use std::io;
+
+#[derive(Debug, Error)]
+pub enum Error {
+	#[error(display = "IO error")]
+	Io(#[error(source)] io::Error),
+
+	#[error(display = "Hyper error")]
+	Hyper(#[error(source)] hyper::Error),
+
+	#[error(display = "Messagepack encode error")]
+	RMPEncode(#[error(source)] rmp_serde::encode::Error),
+	#[error(display = "Messagepack decode error")]
+	RMPDecode(#[error(source)] rmp_serde::decode::Error),
+
+	#[error(display = "")]
+	Msg(String),
+}
diff --git a/src/main.rs b/src/main.rs
new file mode 100644
index 00000000..711717d7
--- /dev/null
+++ b/src/main.rs
@@ -0,0 +1,76 @@
+mod error;
+mod data;
+mod proto;
+mod rpc;
+mod api;
+
+use structopt::StructOpt;
+use futures::channel::oneshot;
+use tokio::sync::Mutex;
+use hyper::client::Client;
+
+use data::*;
+
+
+#[derive(StructOpt, Debug)]
+#[structopt(name = "garage")]
+pub struct Opt {
+	#[structopt(long = "api-port", default_value = "3900")]
+	api_port: u16,
+
+	#[structopt(long = "rpc-port", default_value = "3901")]
+	rpc_port: u16,
+}
+
+pub struct System {
+	pub opt: Opt,
+
+	pub rpc_client: Client<hyper::client::HttpConnector, hyper::Body>,
+
+	pub network_members: Mutex<NetworkMembers>,
+}
+
+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");
+	for ch in chans {
+		ch.send(()).unwrap();
+	}
+}
+
+async fn wait_from(chan: oneshot::Receiver<()>) -> () {
+	chan.await.unwrap()
+}
+
+#[tokio::main]
+async fn main() {
+	let opt = Opt::from_args();
+	let rpc_port = opt.rpc_port;
+	let api_port = opt.api_port;
+
+	let sys = System{
+		opt,
+		rpc_client: Client::new(),
+		network_members: Mutex::new(NetworkMembers::default()),
+	};
+
+	let (tx1, rx1) = oneshot::channel();
+	let (tx2, rx2) = oneshot::channel();
+
+	tokio::spawn(shutdown_signal(vec![tx1, tx2]));
+
+	let rpc_server = rpc::run_rpc_server(&sys, rpc_port, wait_from(rx1));
+	let api_server = api::run_api_server(&sys, api_port, wait_from(rx2));
+
+	let (e1, e2) = futures::join![rpc_server, api_server];
+
+	if let Err(e) = e1 {
+		eprintln!("RPC server error: {}", e)
+	}
+
+	if let Err(e) = e2 {
+		eprintln!("API server error: {}", e)
+	}
+}
diff --git a/src/proto.rs b/src/proto.rs
new file mode 100644
index 00000000..029a58df
--- /dev/null
+++ b/src/proto.rs
@@ -0,0 +1,8 @@
+use serde::{Serialize, Deserialize};
+
+#[derive(Debug, Serialize, Deserialize)]
+pub enum Message {
+	Ok,
+	Error(String),
+
+}
diff --git a/src/rpc.rs b/src/rpc.rs
new file mode 100644
index 00000000..314b64a9
--- /dev/null
+++ b/src/rpc.rs
@@ -0,0 +1,42 @@
+use bytes::IntoBuf;
+use hyper::service::{make_service_fn, service_fn};
+use hyper::{Body, Method, Request, Response, Server, StatusCode};
+use futures::future::Future;
+
+use crate::error::Error;
+use crate::proto::Message;
+use crate::System;
+
+
+/// This is our service handler. It receives a Request, routes on its
+/// path, and returns a Future of a Response.
+async fn echo(req: Request<Body>) -> Result<Response<Body>, Error> {
+	if req.method() != &Method::POST {
+		let mut bad_request = Response::default();
+		*bad_request.status_mut() = StatusCode::BAD_REQUEST;
+		return Ok(bad_request);
+	}
+          
+
+	let whole_body = hyper::body::to_bytes(req.into_body()).await?;
+	let msg = rmp_serde::decode::from_read::<_, Message>(whole_body.into_buf());
+
+	let resp = Message::Ok;
+	Ok(Response::new(Body::from(
+		rmp_serde::encode::to_vec_named(&resp)?
+        )))
+}
+
+
+pub async fn run_rpc_server(sys: &System, rpc_port: u16, shutdown_signal: impl Future<Output=()>) -> Result<(), hyper::Error> {
+    let addr = ([0, 0, 0, 0], rpc_port).into();
+
+    let service = make_service_fn(|_| async { Ok::<_, Error>(service_fn(echo)) });
+
+    let server = Server::bind(&addr).serve(service);
+
+	let graceful = server.with_graceful_shutdown(shutdown_signal);
+    println!("Listening on http://{}", addr);
+
+	graceful.await
+}