networking dentro de las VMs
This commit is contained in:
parent
e9452dc659
commit
9082835262
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@ -2,12 +2,36 @@
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version = "0.4.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
|
||||
|
||||
[[package]]
|
||||
name = "winapi-x86_64-pc-windows-gnu"
|
||||
version = "0.4.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
|
||||
|
||||
[[package]]
|
||||
name = "windows-sys"
|
||||
version = "0.48.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "677d2418bec65e3338edb076e806bc1ec15693c5d0104683f2efe857f61056a9"
|
||||
dependencies = [
|
||||
"windows-targets",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "windows-targets"
|
||||
version = "0.48.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "7b1eb6f0cd7c80c79759c929114ef071b87354ce476d9d94271031c0497adfd5"
|
||||
dependencies = [
|
||||
"windows_aarch64_gnullvm",
|
||||
"windows_aarch64_msvc",
|
||||
"windows_i686_gnu",
|
||||
"windows_i686_msvc",
|
||||
"windows_x86_64_gnu",
|
||||
"windows_x86_64_gnullvm",
|
||||
"windows_x86_64_msvc",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "windows_aarch64_gnullvm"
|
||||
version = "0.48.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "91ae572e1b79dba883e0d315474df7305d12f569b400fcf90581b06062f7e1bc"
|
||||
|
||||
[[package]]
|
||||
name = "windows_aarch64_msvc"
|
||||
version = "0.48.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "b2ef27e0d7bdfcfc7b868b317c1d32c641a6fe4629c171b8928c7b08d98d7cf3"
|
||||
|
||||
[[package]]
|
||||
name = "windows_i686_gnu"
|
||||
version = "0.48.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "622a1962a7db830d6fd0a69683c80a18fda201879f0f447f065a3b7467daa241"
|
||||
|
||||
[[package]]
|
||||
name = "windows_i686_msvc"
|
||||
version = "0.48.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "4542c6e364ce21bf45d69fdd2a8e455fa38d316158cfd43b3ac1c5b1b19f8e00"
|
||||
|
||||
[[package]]
|
||||
name = "windows_x86_64_gnu"
|
||||
version = "0.48.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "ca2b8a661f7628cbd23440e50b05d705db3686f894fc9580820623656af974b1"
|
||||
|
||||
[[package]]
|
||||
name = "windows_x86_64_gnullvm"
|
||||
version = "0.48.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "7896dbc1f41e08872e9d5e8f8baa8fdd2677f29468c4e156210174edc7f7b953"
|
||||
|
||||
[[package]]
|
||||
name = "windows_x86_64_msvc"
|
||||
version = "0.48.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "1a515f5799fe4961cb532f983ce2b23082366b898e52ffbce459c86f67c8378a"
|
||||
|
|
|
|||
|
|
@ -9,3 +9,7 @@ edition = "2021"
|
|||
serde = { version = "1.0.164", features = ["derive"] }
|
||||
serde_json = "1.0.97"
|
||||
nix = "0.19"
|
||||
rtnetlink = { version = "0.12.0" }
|
||||
tokio = { version = "1.0", features = ["macros", "rt", "rt-multi-thread"] }
|
||||
futures = "0.3.28"
|
||||
|
||||
|
|
|
|||
|
|
@ -1,7 +1,9 @@
|
|||
use futures::TryStreamExt;
|
||||
use nix::mount::MsFlags;
|
||||
use serde::{Deserialize, Serialize};
|
||||
use std::fs;
|
||||
use std::{env, io, os::unix, path::Path, process};
|
||||
use std::net::Ipv4Addr;
|
||||
use std::{env, io, io::Write, iter::Iterator, os::unix, path::Path, process};
|
||||
// inspirado en https://github.com/superfly/init-snapshot/blob/public/src/bin/init/main.rs#L230
|
||||
|
||||
#[derive(Serialize, Deserialize, Debug)]
|
||||
|
|
@ -18,26 +20,19 @@ struct ImageConfig {
|
|||
config: Config,
|
||||
}
|
||||
|
||||
fn main() -> Result<(), io::Error> {
|
||||
let src_path = "/image_root";
|
||||
fs::create_dir_all(src_path)?;
|
||||
|
||||
nix::mount::mount::<_, _, _, [u8]>(
|
||||
Some("/dev/vdb"),
|
||||
src_path,
|
||||
Some("squashfs"),
|
||||
MsFlags::MS_RDONLY,
|
||||
None,
|
||||
)
|
||||
.unwrap();
|
||||
|
||||
let config_file = Path::new(&src_path).join(".fireactions-image-config.json");
|
||||
#[tokio::main]
|
||||
async fn main() -> Result<(), io::Error> {
|
||||
let new_root = mount_new_root()?;
|
||||
// TODO: move to after chroot after we start mounting /proc (uses /proc/cmdline)
|
||||
setup_net_interface()
|
||||
.await
|
||||
.expect("couldn't set up network interace");
|
||||
let config_file = Path::new(&new_root).join(".fireactions-image-config.json");
|
||||
let config_text = fs::read(config_file)?;
|
||||
let config: ImageConfig = serde_json::from_slice(&config_text).unwrap();
|
||||
|
||||
println!("{:#?}", config);
|
||||
|
||||
unix::fs::chroot(src_path)?;
|
||||
unix::fs::chroot(new_root)?;
|
||||
env::set_current_dir("/")?;
|
||||
|
||||
// https://github.com/opencontainers/image-spec/blob/b5ec432b1c946c09e1568b18ef70b654a93739f6/conversion.md#verbatim-fields
|
||||
|
|
@ -52,6 +47,10 @@ fn main() -> Result<(), io::Error> {
|
|||
}
|
||||
};
|
||||
|
||||
// TODO: setup hostname
|
||||
// TODO: setup /etc/hosts
|
||||
populate_resolvconf()?;
|
||||
|
||||
let mut child = process::Command::new(&args[0])
|
||||
.args(&args[1..])
|
||||
.env_clear()
|
||||
|
|
@ -66,3 +65,146 @@ fn main() -> Result<(), io::Error> {
|
|||
.unwrap();
|
||||
Ok(())
|
||||
}
|
||||
|
||||
// async fn get_link(handle: &rtnetlink::Handle, name: &'static str) -> _ {
|
||||
// handle
|
||||
// .link()
|
||||
// .get()
|
||||
// .match_name(name.to_string())
|
||||
// .execute()
|
||||
// .try_next()
|
||||
// .await
|
||||
// .expect("no lo link found")
|
||||
// }
|
||||
|
||||
async fn setup_net_interface() -> Result<(), rtnetlink::Error> {
|
||||
let (connection, handle, _) = rtnetlink::new_connection().unwrap();
|
||||
tokio::spawn(connection);
|
||||
|
||||
println!("netlink: getting lo link");
|
||||
let lo = handle
|
||||
.link()
|
||||
.get()
|
||||
.match_name("lo".to_string())
|
||||
.execute()
|
||||
.try_next()
|
||||
.await?
|
||||
.expect("no lo link found");
|
||||
|
||||
println!("netlink: setting lo link \"up\"");
|
||||
handle.link().set(lo.header.index).up().execute().await?;
|
||||
|
||||
let cmdline = fs::read("/proc/cmdline").expect("couldn't read /proc/cmdline");
|
||||
let (guest_addr, host_addr) = cmdline
|
||||
.split(|c| *c == b' ')
|
||||
.map(|keyval| std::str::from_utf8(keyval).unwrap().split_once("="))
|
||||
.filter_map(|o| o)
|
||||
.find(|(key, _)| *key == "fireactions_ip")
|
||||
.expect("didn't find fireactions_ip cmdline")
|
||||
.1
|
||||
.split_once(":")
|
||||
.unwrap();
|
||||
|
||||
println!("netlink: getting eth0 link");
|
||||
let eth0 = handle
|
||||
.link()
|
||||
.get()
|
||||
.match_name("eth0".to_string())
|
||||
.execute()
|
||||
.try_next()
|
||||
.await?
|
||||
.expect("no eth0 link found");
|
||||
|
||||
println!("netlink: setting eth0 link \"up\"");
|
||||
handle
|
||||
.link()
|
||||
.set(eth0.header.index)
|
||||
.up()
|
||||
.mtu(1420)
|
||||
.execute()
|
||||
.await?;
|
||||
|
||||
// XXX: la impl en init-snapshot es sketchy. pareciera que lo único que hace
|
||||
// es desactivar el chequeo de checksum de paquetes, osea una mejora de perf.
|
||||
// let _ = ethtool_set("eth0", ETHTOOL_SRXCSUM, 0);
|
||||
// ethtool_set("eth0", ETHTOOL_STXCSUM, 0)?;
|
||||
|
||||
println!("netlink: adding ip");
|
||||
let address = handle.address();
|
||||
address
|
||||
.add(eth0.header.index, guest_addr.parse().unwrap(), 24)
|
||||
.execute()
|
||||
.await?;
|
||||
|
||||
println!("netlink: adding route");
|
||||
let route = handle.route();
|
||||
route
|
||||
.add()
|
||||
.v4()
|
||||
.gateway(host_addr.parse().unwrap())
|
||||
.execute()
|
||||
.await?;
|
||||
// TODO: ipv6
|
||||
|
||||
Ok(())
|
||||
}
|
||||
|
||||
fn populate_resolvconf() -> Result<(), io::Error> {
|
||||
let mut file = fs::OpenOptions::new()
|
||||
.create(true)
|
||||
.write(true)
|
||||
.truncate(true)
|
||||
.open("/etc/resolv.conf")?;
|
||||
// XXX: usar otro DNS?
|
||||
write!(&mut file, "nameserver\t{}\n", "1.1.1.1")
|
||||
}
|
||||
|
||||
fn mount_new_root() -> Result<&'static str, io::Error> {
|
||||
// process::Command::new("modprobe")
|
||||
// .args(&["overlay"])
|
||||
// .spawn()?
|
||||
// .wait()?;
|
||||
|
||||
let image_root = "/image_src";
|
||||
fs::create_dir_all(image_root)?;
|
||||
nix::mount::mount::<_, _, _, [u8]>(
|
||||
Some("/dev/vdb"),
|
||||
image_root,
|
||||
Some("squashfs"),
|
||||
MsFlags::MS_RDONLY,
|
||||
None,
|
||||
)
|
||||
.unwrap();
|
||||
|
||||
let tmp_rw = "/tmp_rw";
|
||||
fs::create_dir_all(tmp_rw)?;
|
||||
nix::mount::mount::<_, _, _, [u8]>(
|
||||
Some("overlaytemp"),
|
||||
tmp_rw,
|
||||
Some("tmpfs"),
|
||||
MsFlags::empty(),
|
||||
None,
|
||||
)
|
||||
.unwrap();
|
||||
let tmp_upper = "/tmp_rw/upper";
|
||||
fs::create_dir_all(tmp_upper)?;
|
||||
let tmp_work = "/tmp_rw/work";
|
||||
fs::create_dir_all(tmp_work)?;
|
||||
|
||||
let new_root = "/new_root";
|
||||
fs::create_dir_all(new_root)?;
|
||||
let overlay_opts = format!(
|
||||
"lowerdir={},upperdir={},workdir={}",
|
||||
image_root, tmp_upper, tmp_work
|
||||
);
|
||||
nix::mount::mount::<_, _, _, [u8]>(
|
||||
Some("overlay-root"),
|
||||
new_root,
|
||||
Some("overlay"),
|
||||
MsFlags::empty(),
|
||||
Some(overlay_opts.as_bytes()),
|
||||
)
|
||||
.unwrap();
|
||||
|
||||
Ok(new_root)
|
||||
}
|
||||
|
|
|
|||
|
|
@ -1,10 +1,12 @@
|
|||
import { delay } from "nanodelay";
|
||||
import { nanoid } from "nanoid";
|
||||
import { spawn } from "node:child_process";
|
||||
import { spawn, execFile as _execFile } from "node:child_process";
|
||||
import { createServer, request as _request } from "node:http";
|
||||
import { tmpdir } from "node:os";
|
||||
import { join } from "node:path";
|
||||
import { downloadImage, parseImageRef } from "./container-baby.js";
|
||||
import { promisify } from "node:util";
|
||||
const execFile = promisify(_execFile);
|
||||
|
||||
const server = createServer(listener);
|
||||
|
||||
|
|
@ -83,9 +85,11 @@ class FirecrackerInstance {
|
|||
// TODO: retry until success
|
||||
await delay(15);
|
||||
|
||||
const { ifname, hostAddr, guestAddr } = await createNetworkInterface();
|
||||
|
||||
await self.request("PUT", "/boot-source", {
|
||||
kernel_image_path: "../vmlinux.bin",
|
||||
boot_args: "console=ttyS0 reboot=k panic=1 pci=off",
|
||||
boot_args: `console=ttyS0 reboot=k panic=1 pci=off fireactions_ip=${guestAddr}:${hostAddr}`,
|
||||
});
|
||||
await self.request("PUT", "/drives/rootfs", {
|
||||
drive_id: "rootfs",
|
||||
|
|
@ -99,6 +103,11 @@ class FirecrackerInstance {
|
|||
await self.request("PUT", "/drives/" + drive.drive_id, drive);
|
||||
}
|
||||
}
|
||||
await self.request("PUT", "/network-interfaces/eth0", {
|
||||
iface_id: "eth0",
|
||||
guest_mac: "AA:FC:00:00:00:01",
|
||||
host_dev_name: ifname,
|
||||
});
|
||||
|
||||
// API requests are handled asynchronously, it is important the configuration is
|
||||
// set, before `InstanceStart`.
|
||||
|
|
@ -175,4 +184,32 @@ function request(opts, body) {
|
|||
});
|
||||
}
|
||||
|
||||
/**
|
||||
* @type {string[]}
|
||||
*/
|
||||
let interfaces = [];
|
||||
let ifIndex = 2;
|
||||
async function createNetworkInterface() {
|
||||
const ifname = "f" + nanoid(13);
|
||||
await execFile("ip", ["tuntap", "add", ifname, "mode", "tap"]);
|
||||
interfaces.push(ifname);
|
||||
|
||||
const hostAddr = `172.16.0.${ifIndex}`;
|
||||
const guestAddr = `172.16.0.${ifIndex + 1}`;
|
||||
ifIndex += 2;
|
||||
|
||||
await execFile("ip", ["addr", "add", `${hostAddr}/31`, "dev", ifname]);
|
||||
await execFile("ip", ["link", "set", ifname, "up"]);
|
||||
// TODO: setup masquerade
|
||||
|
||||
return { hostAddr, guestAddr, ifname };
|
||||
}
|
||||
|
||||
process.on("beforeExit", async () => {
|
||||
for (const ifname of interfaces) {
|
||||
await execFile("ip", ["tuntap", "del", ifname, "mode", "tap"]);
|
||||
}
|
||||
process.exit(0);
|
||||
});
|
||||
|
||||
server.listen("8080");
|
||||
|
|
|
|||
|
|
@ -5,7 +5,7 @@
|
|||
"description": "",
|
||||
"main": "index.js",
|
||||
"scripts": {
|
||||
"start": "esbuild --bundle index.js --platform=node --sourcemap > build.cjs && node --enable-source-maps build.cjs"
|
||||
"start": "esbuild --bundle index.js --platform=node --sourcemap > build.cjs && sudo node --enable-source-maps build.cjs"
|
||||
},
|
||||
"keywords": [],
|
||||
"author": "",
|
||||
|
|
|
|||
Loading…
Reference in New Issue