External/cloud-hypervisor
1
0
Fork 0
mirror of https://github.com/cloud-hypervisor/cloud-hypervisor.git synced 2024-07-04 17:02:36 +00:00
Code Issues Packages Projects Releases Wiki Activity

tests: Extract out generic integration test code

Browse Source 
This includes:

* OS disk image management
* Cloud init creation
* SSH to guest access
* Waiting for guest to boot

This will be useful in other projects that want to do similar things in
their integration tests.

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
This commit is contained in:
Rob Bradford 2021-03-17 09:33:49 +00:00
parent 9440304183
commit 16cb40733a
2 changed files with 601 additions and 563 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

582
tests/integration.rs
View File

@ -8,12 +8,15 @@
#[macro_use]
extern crate lazy_static;
#[cfg(test)]
#[cfg(feature = "integration_tests")]
mod test_infra;
#[cfg(test)]
#[cfg(feature = "integration_tests")]
mod tests {
#![allow(dead_code)]
use crate::test_infra::*;
use net_util::MacAddr;
use ssh2::Session;
use std::collections::HashMap;
use std::env;
use std::ffi::OsStr;
@ -21,11 +24,9 @@ mod tests {
use std::io;
use std::io::BufRead;
use std::io::{Read, Write};
use std::net::{TcpListener, TcpStream};
use std::os::unix::io::AsRawFd;
use std::path::{Path, PathBuf};
use std::path::PathBuf;
use std::process::{Child, Command, Stdio};
use std::str::FromStr;
use std::string::String;
use std::sync::mpsc::Receiver;
use std::sync::{mpsc, Mutex};
@ -38,23 +39,6 @@ mod tests {
static ref NEXT_VM_ID: Mutex<u8> = Mutex::new(1);
}
struct GuestNetworkConfig {
guest_ip: String,
l2_guest_ip1: String,
l2_guest_ip2: String,
l2_guest_ip3: String,
host_ip: String,
guest_mac: String,
l2_guest_mac1: String,
l2_guest_mac2: String,
l2_guest_mac3: String,
tcp_listener_port: u16,
}
const DEFAULT_TCP_LISTENER_MESSAGE: &str = "booted";
const DEFAULT_TCP_LISTENER_PORT: u16 = 8000;
const DEFAULT_TCP_LISTENER_TIMEOUT: i32 = 80;
struct Guest<'a> {
tmp_dir: TempDir,
disk_config: &'a dyn DiskConfig,
@ -65,23 +49,6 @@ mod tests {
// Safe to implement as we know we have no interior mutability
impl<'a> std::panic::RefUnwindSafe for Guest<'a> {}
enum DiskType {
OperatingSystem,
CloudInit,
}
trait DiskConfig {
fn prepare_files(&mut self, tmp_dir: &TempDir, network: &GuestNetworkConfig);
fn prepare_cloudinit(&self, tmp_dir: &TempDir, network: &GuestNetworkConfig) -> String;
fn disk(&self, disk_type: DiskType) -> Option<String>;
}
struct UbuntuDiskConfig {
osdisk_path: String,
cloudinit_path: String,
image_name: String,
}
#[cfg(target_arch = "x86_64")]
const BIONIC_IMAGE_NAME: &str = "bionic-server-cloudimg-amd64.raw";
#[cfg(target_arch = "x86_64")]
@ -117,138 +84,6 @@ mod tests {
const PIPE_SIZE: i32 = 32 << 20;
impl UbuntuDiskConfig {
fn new(image_name: String) -> Self {
UbuntuDiskConfig {
image_name,
osdisk_path: String::new(),
cloudinit_path: String::new(),
}
}
}
struct WindowsDiskConfig {
image_name: String,
osdisk_path: String,
loopback_device: String,
windows_snapshot_cow: String,
windows_snapshot: String,
}
impl WindowsDiskConfig {
fn new(image_name: String) -> Self {
WindowsDiskConfig {
image_name,
osdisk_path: String::new(),
loopback_device: String::new(),
windows_snapshot_cow: String::new(),
windows_snapshot: String::new(),
}
}
}
impl Drop for WindowsDiskConfig {
fn drop(&mut self) {
// dmsetup remove windows-snapshot-1
std::process::Command::new("dmsetup")
.arg("remove")
.arg(self.windows_snapshot.as_str())
.output()
.expect("Expect removing Windows snapshot with 'dmsetup' to succeed");
// dmsetup remove windows-snapshot-cow-1
std::process::Command::new("dmsetup")
.arg("remove")
.arg(self.windows_snapshot_cow.as_str())
.output()
.expect("Expect removing Windows snapshot CoW with 'dmsetup' to succeed");
// losetup -d <loopback_device>
std::process::Command::new("losetup")
.args(&["-d", self.loopback_device.as_str()])
.output()
.expect("Expect removing loopback device to succeed");
}
}
fn handle_child_output(
r: Result<(), std::boxed::Box<dyn std::any::Any + std::marker::Send>>,
output: &std::process::Output,
) {
use std::os::unix::process::ExitStatusExt;
if r.is_ok() && output.status.success() {
return;
}
match output.status.code() {
None => {
// Don't treat child.kill() as a problem
if output.status.signal() == Some(9) && r.is_ok() {
return;
}
eprintln!(
"==== child killed by signal: {} ====",
output.status.signal().unwrap()
);
}
Some(code) => {
eprintln!("\n\n==== child exit code: {} ====", code);
}
}
eprintln!(
"\n\n==== Start child stdout ====\n\n{}\n\n==== End child stdout ====",
String::from_utf8_lossy(&output.stdout)
);
eprintln!(
"\n\n==== Start child stderr ====\n\n{}\n\n==== End child stderr ====",
String::from_utf8_lossy(&output.stderr)
);
panic!("Test failed")
}
fn rate_limited_copy<P: AsRef<Path>, Q: AsRef<Path>>(from: P, to: Q) -> io::Result<u64> {
for i in 0..10 {
let free_bytes = unsafe {
let mut stats = std::mem::MaybeUninit::zeroed();
let fs_name = std::ffi::CString::new("/tmp").unwrap();
libc::statvfs(fs_name.as_ptr(), stats.as_mut_ptr());
let free_blocks = stats.assume_init().f_bfree;
let block_size = stats.assume_init().f_bsize;
free_blocks * block_size
};
// Make sure there is at least 6 GiB of space
if free_bytes < 6 << 30 {
eprintln!(
"Not enough space on disk ({}). Attempt {} of 10. Sleeping.",
free_bytes, i
);
thread::sleep(std::time::Duration::new(60, 0));
continue;
}
match fs::copy(&from, &to) {
Err(e) => {
if let Some(errno) = e.raw_os_error() {
if errno == libc::ENOSPC {
eprintln!("Copy returned ENOSPC. Attempt {} of 10. Sleeping.", i);
thread::sleep(std::time::Duration::new(60, 0));
continue;
}
}
return Err(e);
}
Ok(i) => return Ok(i),
}
}
Err(io::Error::last_os_error())
}
fn clh_command(cmd: &str) -> String {
env::var("BUILD_TARGET").map_or(
format!("target/x86_64-unknown-linux-gnu/release/{}", cmd),
@ -256,222 +91,6 @@ mod tests {
)
}
impl DiskConfig for UbuntuDiskConfig {
fn prepare_cloudinit(&self, tmp_dir: &TempDir, network: &GuestNetworkConfig) -> String {
let cloudinit_file_path =
String::from(tmp_dir.as_path().join("cloudinit").to_str().unwrap());
let cloud_init_directory = tmp_dir.as_path().join("cloud-init").join("ubuntu");
fs::create_dir_all(&cloud_init_directory)
.expect("Expect creating cloud-init directory to succeed");
let source_file_dir = std::env::current_dir()
.unwrap()
.join("test_data")
.join("cloud-init")
.join("ubuntu");
vec!["meta-data"].iter().for_each(|x| {
rate_limited_copy(source_file_dir.join(x), cloud_init_directory.join(x))
.expect("Expect copying cloud-init meta-data to succeed");
});
let mut user_data_string = String::new();
fs::File::open(source_file_dir.join("user-data"))
.unwrap()
.read_to_string(&mut user_data_string)
.expect("Expected reading user-data file in to succeed");
user_data_string = user_data_string.replace(
"@DEFAULT_TCP_LISTENER_MESSAGE",
&DEFAULT_TCP_LISTENER_MESSAGE,
);
user_data_string = user_data_string.replace("@HOST_IP", &network.host_ip);
user_data_string = user_data_string
.replace("@TCP_LISTENER_PORT", &network.tcp_listener_port.to_string());
fs::File::create(cloud_init_directory.join("user-data"))
.unwrap()
.write_all(&user_data_string.as_bytes())
.expect("Expected writing out user-data to succeed");
let mut network_config_string = String::new();
fs::File::open(source_file_dir.join("network-config"))
.unwrap()
.read_to_string(&mut network_config_string)
.expect("Expected reading network-config file in to succeed");
network_config_string = network_config_string.replace("192.168.2.1", &network.host_ip);
network_config_string = network_config_string.replace("192.168.2.2", &network.guest_ip);
network_config_string =
network_config_string.replace("192.168.2.3", &network.l2_guest_ip1);
network_config_string =
network_config_string.replace("192.168.2.4", &network.l2_guest_ip2);
network_config_string =
network_config_string.replace("192.168.2.5", &network.l2_guest_ip3);
network_config_string =
network_config_string.replace("12:34:56:78:90:ab", &network.guest_mac);
network_config_string =
network_config_string.replace("de:ad:be:ef:12:34", &network.l2_guest_mac1);
network_config_string =
network_config_string.replace("de:ad:be:ef:34:56", &network.l2_guest_mac2);
network_config_string =
network_config_string.replace("de:ad:be:ef:56:78", &network.l2_guest_mac3);
fs::File::create(cloud_init_directory.join("network-config"))
.unwrap()
.write_all(&network_config_string.as_bytes())
.expect("Expected writing out network-config to succeed");
std::process::Command::new("mkdosfs")
.args(&["-n", "cidata"])
.args(&["-C", cloudinit_file_path.as_str()])
.arg("8192")
.output()
.expect("Expect creating disk image to succeed");
vec!["user-data", "meta-data", "network-config"]
.iter()
.for_each(|x| {
std::process::Command::new("mcopy")
.arg("-o")
.args(&["-i", cloudinit_file_path.as_str()])
.args(&["-s", cloud_init_directory.join(x).to_str().unwrap(), "::"])
.output()
.expect("Expect copying files to disk image to succeed");
});
cloudinit_file_path
}
fn prepare_files(&mut self, tmp_dir: &TempDir, network: &GuestNetworkConfig) {
let mut workload_path = dirs::home_dir().unwrap();
workload_path.push("workloads");
let mut osdisk_base_path = workload_path;
osdisk_base_path.push(&self.image_name);
let osdisk_path = String::from(tmp_dir.as_path().join("osdisk.img").to_str().unwrap());
let cloudinit_path = self.prepare_cloudinit(tmp_dir, network);
rate_limited_copy(osdisk_base_path, &osdisk_path)
.expect("copying of OS source disk image failed");
self.cloudinit_path = cloudinit_path;
self.osdisk_path = osdisk_path;
}
fn disk(&self, disk_type: DiskType) -> Option<String> {
match disk_type {
DiskType::OperatingSystem => Some(self.osdisk_path.clone()),
DiskType::CloudInit => Some(self.cloudinit_path.clone()),
}
}
}
impl DiskConfig for WindowsDiskConfig {
fn prepare_cloudinit(&self, _tmp_dir: &TempDir, _network: &GuestNetworkConfig) -> String {
String::new()
}
fn prepare_files(&mut self, tmp_dir: &TempDir, _network: &GuestNetworkConfig) {
let mut workload_path = dirs::home_dir().unwrap();
workload_path.push("workloads");
let mut osdisk_path = workload_path;
osdisk_path.push(&self.image_name);
let osdisk_blk_size = fs::metadata(osdisk_path)
.expect("Expect retrieving Windows image metadata")
.len()
>> 9;
let snapshot_cow_path =
String::from(tmp_dir.as_path().join("snapshot_cow").to_str().unwrap());
// Create and truncate CoW file for device mapper
let cow_file_size: u64 = 1 << 30;
let cow_file_blk_size = cow_file_size >> 9;
let cow_file = std::fs::File::create(snapshot_cow_path.as_str())
.expect("Expect creating CoW image to succeed");
cow_file
.set_len(cow_file_size)
.expect("Expect truncating CoW image to succeed");
// losetup --find --show /tmp/snapshot_cow
let loopback_device = std::process::Command::new("losetup")
.arg("--find")
.arg("--show")
.arg(snapshot_cow_path.as_str())
.output()
.expect("Expect creating loopback device from snapshot CoW image to succeed");
self.loopback_device = String::from_utf8_lossy(&loopback_device.stdout)
.trim()
.to_string();
let random_extension = tmp_dir.as_path().file_name().unwrap();
let windows_snapshot_cow = format!(
"windows-snapshot-cow-{}",
random_extension.to_str().unwrap()
);
// dmsetup create windows-snapshot-cow-1 --table '0 2097152 linear /dev/loop1 0'
std::process::Command::new("dmsetup")
.arg("create")
.arg(windows_snapshot_cow.as_str())
.args(&[
"--table",
format!("0 {} linear {} 0", cow_file_blk_size, self.loopback_device).as_str(),
])
.output()
.expect("Expect creating Windows snapshot CoW with 'dmsetup' to succeed");
let windows_snapshot =
format!("windows-snapshot-{}", random_extension.to_str().unwrap());
// dmsetup mknodes
std::process::Command::new("dmsetup")
.arg("mknodes")
.output()
.expect("Expect device mapper nodes to be ready");
// dmsetup create windows-snapshot-1 --table '0 41943040 snapshot /dev/mapper/windows-base /dev/mapper/windows-snapshot-cow-1 P 8'
std::process::Command::new("dmsetup")
.arg("create")
.arg(windows_snapshot.as_str())
.args(&[
"--table",
format!(
"0 {} snapshot /dev/mapper/windows-base /dev/mapper/{} P 8",
osdisk_blk_size,
windows_snapshot_cow.as_str()
)
.as_str(),
])
.output()
.expect("Expect creating Windows snapshot with 'dmsetup' to succeed");
// dmsetup mknodes
std::process::Command::new("dmsetup")
.arg("mknodes")
.output()
.expect("Expect device mapper nodes to be ready");
self.osdisk_path = format!("/dev/mapper/{}", windows_snapshot);
self.windows_snapshot_cow = windows_snapshot_cow;
self.windows_snapshot = windows_snapshot;
}
fn disk(&self, disk_type: DiskType) -> Option<String> {
match disk_type {
DiskType::OperatingSystem => Some(self.osdisk_path.clone()),
DiskType::CloudInit => None,
}
}
}
fn prepare_virtiofsd(
tmp_dir: &TempDir,
shared_dir: &str,
@ -715,102 +334,16 @@ mod tests {
cmd.status().expect("Failed to launch ch-remote").success()
}
#[derive(Debug)]
struct PasswordAuth {
username: String,
password: String,
}
const DEFAULT_SSH_RETRIES: u8 = 6;
const DEFAULT_SSH_TIMEOUT: u8 = 10;
fn ssh_command_ip_with_auth(
command: &str,
auth: &PasswordAuth,
ip: &str,
retries: u8,
timeout: u8,
) -> Result<String, Error> {
let mut s = String::new();
let mut counter = 0;
loop {
match (|| -> Result<(), Error> {
let tcp = TcpStream::connect(format!("{}:22", ip)).map_err(Error::Connection)?;
let mut sess = Session::new().unwrap();
sess.set_tcp_stream(tcp);
sess.handshake().map_err(Error::Handshake)?;
sess.userauth_password(&auth.username, &auth.password)
.map_err(Error::Authentication)?;
assert!(sess.authenticated());
let mut channel = sess.channel_session().map_err(Error::ChannelSession)?;
channel.exec(command).map_err(Error::Command)?;
// Intentionally ignore these results here as their failure
// does not precipitate a repeat
let _ = channel.read_to_string(&mut s);
let _ = channel.close();
let _ = channel.wait_close();
Ok(())
})() {
Ok(_) => break,
Err(e) => {
counter += 1;
if counter >= retries {
eprintln!(
"\n\n==== Start ssh command output (FAILED) ====\n\n\
command=\"{}\"\n\
auth=\"{:#?}\"\n\
ip=\"{}\"\n\
output=\"{}\"\n\
error=\"{}\"\n\
\n==== End ssh command outout ====\n\n",
command, auth, ip, s, e
);
return Err(e);
}
}
};
thread::sleep(std::time::Duration::new((timeout * counter).into(), 0));
}
Ok(s)
}
fn ssh_command_ip(command: &str, ip: &str, retries: u8, timeout: u8) -> Result<String, Error> {
ssh_command_ip_with_auth(
command,
&PasswordAuth {
username: String::from("cloud"),
password: String::from("cloud123"),
},
ip,
retries,
timeout,
)
}
#[derive(Debug)]
enum Error {
Connection(std::io::Error),
Handshake(ssh2::Error),
Authentication(ssh2::Error),
ChannelSession(ssh2::Error),
Command(ssh2::Error),
Parsing(std::num::ParseIntError),
EpollWait(std::io::Error),
EpollWaitTimeout,
ReadToString(std::io::Error),
SetReadTimeout(std::io::Error),
WrongGuestAddr,
SshCommand(SshCommandError),
WaitForBoot(WaitForBootError),
}
impl std::error::Error for Error {}
impl std::fmt::Display for Error {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
write!(f, "{:?}", self)
impl From<SshCommandError> for Error {
fn from(e: SshCommandError) -> Self {
Self::SshCommand(e)
}
}
@ -872,7 +405,7 @@ mod tests {
)
}
fn ssh_command(&self, command: &str) -> Result<String, Error> {
fn ssh_command(&self, command: &str) -> Result<String, SshCommandError> {
ssh_command_ip(
command,
&self.network.guest_ip,
@ -881,7 +414,7 @@ mod tests {
)
}
fn ssh_command_l1(&self, command: &str) -> Result<String, Error> {
fn ssh_command_l1(&self, command: &str) -> Result<String, SshCommandError> {
ssh_command_ip(
command,
&self.network.guest_ip,
@ -890,7 +423,7 @@ mod tests {
)
}
fn ssh_command_l2_1(&self, command: &str) -> Result<String, Error> {
fn ssh_command_l2_1(&self, command: &str) -> Result<String, SshCommandError> {
ssh_command_ip(
command,
&self.network.l2_guest_ip1,
@ -899,7 +432,7 @@ mod tests {
)
}
fn ssh_command_l2_2(&self, command: &str) -> Result<String, Error> {
fn ssh_command_l2_2(&self, command: &str) -> Result<String, SshCommandError> {
ssh_command_ip(
command,
&self.network.l2_guest_ip2,
@ -908,7 +441,7 @@ mod tests {
)
}
fn ssh_command_l2_3(&self, command: &str) -> Result<String, Error> {
fn ssh_command_l2_3(&self, command: &str) -> Result<String, SshCommandError> {
ssh_command_ip(
command,
&self.network.l2_guest_ip3,
@ -989,86 +522,9 @@ mod tests {
}
fn wait_vm_boot(&self, custom_timeout: Option<i32>) -> Result<(), Error> {
let start = std::time::Instant::now();
// The 'port' is unique per 'GUEST' and listening to wild-card ip avoids retrying on 'TcpListener::bind()'
let listen_addr = format!("0.0.0.0:{}", self.network.tcp_listener_port);
let expected_guest_addr = self.network.guest_ip.as_str();
let mut s = String::new();
let timeout = match custom_timeout {
Some(t) => t,
None => DEFAULT_TCP_LISTENER_TIMEOUT,
};
match (|| -> Result<(), Error> {
let listener =
TcpListener::bind(&listen_addr.as_str()).map_err(Error::Connection)?;
listener
.set_nonblocking(true)
.expect("Cannot set non-blocking for tcp listener");
// Reply on epoll w/ timeout to wait for guest connections faithfully
let epoll_fd = epoll::create(true).expect("Cannot create epoll fd");
epoll::ctl(
epoll_fd,
epoll::ControlOptions::EPOLL_CTL_ADD,
listener.as_raw_fd(),
epoll::Event::new(epoll::Events::EPOLLIN, 0),
)
.expect("Cannot add 'tcp_listener' event to epoll");
let mut events = vec![epoll::Event::new(epoll::Events::empty(), 0); 1];
loop {
let num_events =
match epoll::wait(epoll_fd, timeout * 1000_i32, &mut events[..]) {
Ok(num_events) => Ok(num_events),
Err(e) => match e.raw_os_error() {
Some(libc::EAGAIN) | Some(libc::EINTR) => continue,
_ => Err(e),
},
}
.map_err(Error::EpollWait)?;
if num_events == 0 {
return Err(Error::EpollWaitTimeout);
}
break;
}
match listener.accept() {
Ok((_, addr)) => {
// Make sure the connection is from the expected 'guest_addr'
if addr.ip() != std::net::IpAddr::from_str(expected_guest_addr).unwrap() {
s = format!(
"Expecting the guest ip '{}' while being connected with ip '{}'",
expected_guest_addr,
addr.ip()
);
return Err(Error::WrongGuestAddr);
}
Ok(())
}
Err(e) => {
s = "TcpListener::accept() failed".to_string();
Err(Error::Connection(e))
}
}
})() {
Err(e) => {
let duration = start.elapsed();
eprintln!(
"\n\n==== Start 'wait_vm_boot' (FAILED) ====\n\n\
duration =\"{:?}, timeout = {}s\"\n\
listen_addr=\"{}\"\n\
expected_guest_addr=\"{}\"\n\
message=\"{}\"\n\
error=\"{}\"\n\
\n==== End 'wait_vm_boot' outout ====\n\n",
duration, timeout, listen_addr, expected_guest_addr, s, e
);
Err(e)
}
Ok(_) => Ok(()),
}
self.network
.wait_vm_boot(custom_timeout)
.map_err(Error::WaitForBoot)
}
fn check_numa_node_cpus(&self, node_id: usize, cpus: Vec<usize>) -> Result<bool, Error> {

582
tests/test_infra/mod.rs Normal file
View File

@ -0,0 +1,582 @@
// Copyright © 2021 Intel Corporation
//
// SPDX-License-Identifier: Apache-2.0
//
use ssh2::Session;
use std::fs;
use std::io;
use std::io::{Read, Write};
use std::net::TcpListener;
use std::net::TcpStream;
use std::os::unix::io::AsRawFd;
use std::path::Path;
use std::str::FromStr;
use std::thread;
use vmm_sys_util::tempdir::TempDir;
pub const DEFAULT_TCP_LISTENER_MESSAGE: &str = "booted";
pub struct GuestNetworkConfig {
pub guest_ip: String,
pub l2_guest_ip1: String,
pub l2_guest_ip2: String,
pub l2_guest_ip3: String,
pub host_ip: String,
pub guest_mac: String,
pub l2_guest_mac1: String,
pub l2_guest_mac2: String,
pub l2_guest_mac3: String,
pub tcp_listener_port: u16,
}
pub const DEFAULT_TCP_LISTENER_PORT: u16 = 8000;
pub const DEFAULT_TCP_LISTENER_TIMEOUT: i32 = 80;
#[derive(Debug)]
pub enum WaitForBootError {
EpollWait(std::io::Error),
Listen(std::io::Error),
EpollWaitTimeout,
WrongGuestAddr,
Accept(std::io::Error),
}
impl GuestNetworkConfig {
pub fn wait_vm_boot(&self, custom_timeout: Option<i32>) -> Result<(), WaitForBootError> {
let start = std::time::Instant::now();
// The 'port' is unique per 'GUEST' and listening to wild-card ip avoids retrying on 'TcpListener::bind()'
let listen_addr = format!("0.0.0.0:{}", self.tcp_listener_port);
let expected_guest_addr = self.guest_ip.as_str();
let mut s = String::new();
let timeout = match custom_timeout {
Some(t) => t,
None => DEFAULT_TCP_LISTENER_TIMEOUT,
};
match (|| -> Result<(), WaitForBootError> {
let listener =
TcpListener::bind(&listen_addr.as_str()).map_err(WaitForBootError::Listen)?;
listener
.set_nonblocking(true)
.expect("Cannot set non-blocking for tcp listener");
// Reply on epoll w/ timeout to wait for guest connections faithfully
let epoll_fd = epoll::create(true).expect("Cannot create epoll fd");
epoll::ctl(
epoll_fd,
epoll::ControlOptions::EPOLL_CTL_ADD,
listener.as_raw_fd(),
epoll::Event::new(epoll::Events::EPOLLIN, 0),
)
.expect("Cannot add 'tcp_listener' event to epoll");
let mut events = vec![epoll::Event::new(epoll::Events::empty(), 0); 1];
loop {
let num_events = match epoll::wait(epoll_fd, timeout * 1000_i32, &mut events[..]) {
Ok(num_events) => Ok(num_events),
Err(e) => match e.raw_os_error() {
Some(libc::EAGAIN) | Some(libc::EINTR) => continue,
_ => Err(e),
},
}
.map_err(WaitForBootError::EpollWait)?;
if num_events == 0 {
return Err(WaitForBootError::EpollWaitTimeout);
}
break;
}
match listener.accept() {
Ok((_, addr)) => {
// Make sure the connection is from the expected 'guest_addr'
if addr.ip() != std::net::IpAddr::from_str(expected_guest_addr).unwrap() {
s = format!(
"Expecting the guest ip '{}' while being connected with ip '{}'",
expected_guest_addr,
addr.ip()
);
return Err(WaitForBootError::WrongGuestAddr);
}
Ok(())
}
Err(e) => {
s = "TcpListener::accept() failed".to_string();
Err(WaitForBootError::Accept(e))
}
}
})() {
Err(e) => {
let duration = start.elapsed();
eprintln!(
"\n\n==== Start 'wait_vm_boot' (FAILED) ====\n\n\
duration =\"{:?}, timeout = {}s\"\n\
listen_addr=\"{}\"\n\
expected_guest_addr=\"{}\"\n\
message=\"{}\"\n\
error=\"{:?}\"\n\
\n==== End 'wait_vm_boot' outout ====\n\n",
duration, timeout, listen_addr, expected_guest_addr, s, e
);
Err(e)
}
Ok(_) => Ok(()),
}
}
}
pub enum DiskType {
OperatingSystem,
CloudInit,
}
pub trait DiskConfig {
fn prepare_files(&mut self, tmp_dir: &TempDir, network: &GuestNetworkConfig);
fn prepare_cloudinit(&self, tmp_dir: &TempDir, network: &GuestNetworkConfig) -> String;
fn disk(&self, disk_type: DiskType) -> Option<String>;
}
pub struct UbuntuDiskConfig {
osdisk_path: String,
cloudinit_path: String,
image_name: String,
}
impl UbuntuDiskConfig {
pub fn new(image_name: String) -> Self {
UbuntuDiskConfig {
image_name,
osdisk_path: String::new(),
cloudinit_path: String::new(),
}
}
}
pub struct WindowsDiskConfig {
image_name: String,
osdisk_path: String,
loopback_device: String,
windows_snapshot_cow: String,
windows_snapshot: String,
}
impl WindowsDiskConfig {
pub fn new(image_name: String) -> Self {
WindowsDiskConfig {
image_name,
osdisk_path: String::new(),
loopback_device: String::new(),
windows_snapshot_cow: String::new(),
windows_snapshot: String::new(),
}
}
}
impl Drop for WindowsDiskConfig {
fn drop(&mut self) {
// dmsetup remove windows-snapshot-1
std::process::Command::new("dmsetup")
.arg("remove")
.arg(self.windows_snapshot.as_str())
.output()
.expect("Expect removing Windows snapshot with 'dmsetup' to succeed");
// dmsetup remove windows-snapshot-cow-1
std::process::Command::new("dmsetup")
.arg("remove")
.arg(self.windows_snapshot_cow.as_str())
.output()
.expect("Expect removing Windows snapshot CoW with 'dmsetup' to succeed");
// losetup -d <loopback_device>
std::process::Command::new("losetup")
.args(&["-d", self.loopback_device.as_str()])
.output()
.expect("Expect removing loopback device to succeed");
}
}
impl DiskConfig for UbuntuDiskConfig {
fn prepare_cloudinit(&self, tmp_dir: &TempDir, network: &GuestNetworkConfig) -> String {
let cloudinit_file_path =
String::from(tmp_dir.as_path().join("cloudinit").to_str().unwrap());
let cloud_init_directory = tmp_dir.as_path().join("cloud-init").join("ubuntu");
fs::create_dir_all(&cloud_init_directory)
.expect("Expect creating cloud-init directory to succeed");
let source_file_dir = std::env::current_dir()
.unwrap()
.join("test_data")
.join("cloud-init")
.join("ubuntu");
vec!["meta-data"].iter().for_each(|x| {
rate_limited_copy(source_file_dir.join(x), cloud_init_directory.join(x))
.expect("Expect copying cloud-init meta-data to succeed");
});
let mut user_data_string = String::new();
fs::File::open(source_file_dir.join("user-data"))
.unwrap()
.read_to_string(&mut user_data_string)
.expect("Expected reading user-data file in to succeed");
user_data_string = user_data_string.replace(
"@DEFAULT_TCP_LISTENER_MESSAGE",
&DEFAULT_TCP_LISTENER_MESSAGE,
);
user_data_string = user_data_string.replace("@HOST_IP", &network.host_ip);
user_data_string =
user_data_string.replace("@TCP_LISTENER_PORT", &network.tcp_listener_port.to_string());
fs::File::create(cloud_init_directory.join("user-data"))
.unwrap()
.write_all(&user_data_string.as_bytes())
.expect("Expected writing out user-data to succeed");
let mut network_config_string = String::new();
fs::File::open(source_file_dir.join("network-config"))
.unwrap()
.read_to_string(&mut network_config_string)
.expect("Expected reading network-config file in to succeed");
network_config_string = network_config_string.replace("192.168.2.1", &network.host_ip);
network_config_string = network_config_string.replace("192.168.2.2", &network.guest_ip);
network_config_string = network_config_string.replace("192.168.2.3", &network.l2_guest_ip1);
network_config_string = network_config_string.replace("192.168.2.4", &network.l2_guest_ip2);
network_config_string = network_config_string.replace("192.168.2.5", &network.l2_guest_ip3);
network_config_string =
network_config_string.replace("12:34:56:78:90:ab", &network.guest_mac);
network_config_string =
network_config_string.replace("de:ad:be:ef:12:34", &network.l2_guest_mac1);
network_config_string =
network_config_string.replace("de:ad:be:ef:34:56", &network.l2_guest_mac2);
network_config_string =
network_config_string.replace("de:ad:be:ef:56:78", &network.l2_guest_mac3);
fs::File::create(cloud_init_directory.join("network-config"))
.unwrap()
.write_all(&network_config_string.as_bytes())
.expect("Expected writing out network-config to succeed");
std::process::Command::new("mkdosfs")
.args(&["-n", "cidata"])
.args(&["-C", cloudinit_file_path.as_str()])
.arg("8192")
.output()
.expect("Expect creating disk image to succeed");
vec!["user-data", "meta-data", "network-config"]
.iter()
.for_each(|x| {
std::process::Command::new("mcopy")
.arg("-o")
.args(&["-i", cloudinit_file_path.as_str()])
.args(&["-s", cloud_init_directory.join(x).to_str().unwrap(), "::"])
.output()
.expect("Expect copying files to disk image to succeed");
});
cloudinit_file_path
}
fn prepare_files(&mut self, tmp_dir: &TempDir, network: &GuestNetworkConfig) {
let mut workload_path = dirs::home_dir().unwrap();
workload_path.push("workloads");
let mut osdisk_base_path = workload_path;
osdisk_base_path.push(&self.image_name);
let osdisk_path = String::from(tmp_dir.as_path().join("osdisk.img").to_str().unwrap());
let cloudinit_path = self.prepare_cloudinit(tmp_dir, network);
rate_limited_copy(osdisk_base_path, &osdisk_path)
.expect("copying of OS source disk image failed");
self.cloudinit_path = cloudinit_path;
self.osdisk_path = osdisk_path;
}
fn disk(&self, disk_type: DiskType) -> Option<String> {
match disk_type {
DiskType::OperatingSystem => Some(self.osdisk_path.clone()),
DiskType::CloudInit => Some(self.cloudinit_path.clone()),
}
}
}
impl DiskConfig for WindowsDiskConfig {
fn prepare_cloudinit(&self, _tmp_dir: &TempDir, _network: &GuestNetworkConfig) -> String {
String::new()
}
fn prepare_files(&mut self, tmp_dir: &TempDir, _network: &GuestNetworkConfig) {
let mut workload_path = dirs::home_dir().unwrap();
workload_path.push("workloads");
let mut osdisk_path = workload_path;
osdisk_path.push(&self.image_name);
let osdisk_blk_size = fs::metadata(osdisk_path)
.expect("Expect retrieving Windows image metadata")
.len()
>> 9;
let snapshot_cow_path =
String::from(tmp_dir.as_path().join("snapshot_cow").to_str().unwrap());
// Create and truncate CoW file for device mapper
let cow_file_size: u64 = 1 << 30;
let cow_file_blk_size = cow_file_size >> 9;
let cow_file = std::fs::File::create(snapshot_cow_path.as_str())
.expect("Expect creating CoW image to succeed");
cow_file
.set_len(cow_file_size)
.expect("Expect truncating CoW image to succeed");
// losetup --find --show /tmp/snapshot_cow
let loopback_device = std::process::Command::new("losetup")
.arg("--find")
.arg("--show")
.arg(snapshot_cow_path.as_str())
.output()
.expect("Expect creating loopback device from snapshot CoW image to succeed");
self.loopback_device = String::from_utf8_lossy(&loopback_device.stdout)
.trim()
.to_string();
let random_extension = tmp_dir.as_path().file_name().unwrap();
let windows_snapshot_cow = format!(
"windows-snapshot-cow-{}",
random_extension.to_str().unwrap()
);
// dmsetup create windows-snapshot-cow-1 --table '0 2097152 linear /dev/loop1 0'
std::process::Command::new("dmsetup")
.arg("create")
.arg(windows_snapshot_cow.as_str())
.args(&[
"--table",
format!("0 {} linear {} 0", cow_file_blk_size, self.loopback_device).as_str(),
])
.output()
.expect("Expect creating Windows snapshot CoW with 'dmsetup' to succeed");
let windows_snapshot = format!("windows-snapshot-{}", random_extension.to_str().unwrap());
// dmsetup mknodes
std::process::Command::new("dmsetup")
.arg("mknodes")
.output()
.expect("Expect device mapper nodes to be ready");
// dmsetup create windows-snapshot-1 --table '0 41943040 snapshot /dev/mapper/windows-base /dev/mapper/windows-snapshot-cow-1 P 8'
std::process::Command::new("dmsetup")
.arg("create")
.arg(windows_snapshot.as_str())
.args(&[
"--table",
format!(
"0 {} snapshot /dev/mapper/windows-base /dev/mapper/{} P 8",
osdisk_blk_size,
windows_snapshot_cow.as_str()
)
.as_str(),
])
.output()
.expect("Expect creating Windows snapshot with 'dmsetup' to succeed");
// dmsetup mknodes
std::process::Command::new("dmsetup")
.arg("mknodes")
.output()
.expect("Expect device mapper nodes to be ready");
self.osdisk_path = format!("/dev/mapper/{}", windows_snapshot);
self.windows_snapshot_cow = windows_snapshot_cow;
self.windows_snapshot = windows_snapshot;
}
fn disk(&self, disk_type: DiskType) -> Option<String> {
match disk_type {
DiskType::OperatingSystem => Some(self.osdisk_path.clone()),
DiskType::CloudInit => None,
}
}
}
pub fn rate_limited_copy<P: AsRef<Path>, Q: AsRef<Path>>(from: P, to: Q) -> io::Result<u64> {
for i in 0..10 {
let free_bytes = unsafe {
let mut stats = std::mem::MaybeUninit::zeroed();
let fs_name = std::ffi::CString::new("/tmp").unwrap();
libc::statvfs(fs_name.as_ptr(), stats.as_mut_ptr());
let free_blocks = stats.assume_init().f_bfree;
let block_size = stats.assume_init().f_bsize;
free_blocks * block_size
};
// Make sure there is at least 6 GiB of space
if free_bytes < 6 << 30 {
eprintln!(
"Not enough space on disk ({}). Attempt {} of 10. Sleeping.",
free_bytes, i
);
thread::sleep(std::time::Duration::new(60, 0));
continue;
}
match fs::copy(&from, &to) {
Err(e) => {
if let Some(errno) = e.raw_os_error() {
if errno == libc::ENOSPC {
eprintln!("Copy returned ENOSPC. Attempt {} of 10. Sleeping.", i);
thread::sleep(std::time::Duration::new(60, 0));
continue;
}
}
return Err(e);
}
Ok(i) => return Ok(i),
}
}
Err(io::Error::last_os_error())
}
pub fn handle_child_output(
r: Result<(), std::boxed::Box<dyn std::any::Any + std::marker::Send>>,
output: &std::process::Output,
) {
use std::os::unix::process::ExitStatusExt;
if r.is_ok() && output.status.success() {
return;
}
match output.status.code() {
None => {
// Don't treat child.kill() as a problem
if output.status.signal() == Some(9) && r.is_ok() {
return;
}
eprintln!(
"==== child killed by signal: {} ====",
output.status.signal().unwrap()
);
}
Some(code) => {
eprintln!("\n\n==== child exit code: {} ====", code);
}
}
eprintln!(
"\n\n==== Start child stdout ====\n\n{}\n\n==== End child stdout ====",
String::from_utf8_lossy(&output.stdout)
);
eprintln!(
"\n\n==== Start child stderr ====\n\n{}\n\n==== End child stderr ====",
String::from_utf8_lossy(&output.stderr)
);
panic!("Test failed")
}
#[derive(Debug)]
pub struct PasswordAuth {
pub username: String,
pub password: String,
}
pub const DEFAULT_SSH_RETRIES: u8 = 6;
pub const DEFAULT_SSH_TIMEOUT: u8 = 10;
#[derive(Debug)]
pub enum SshCommandError {
Connection(std::io::Error),
Handshake(ssh2::Error),
Authentication(ssh2::Error),
ChannelSession(ssh2::Error),
Command(ssh2::Error),
}
pub fn ssh_command_ip_with_auth(
command: &str,
auth: &PasswordAuth,
ip: &str,
retries: u8,
timeout: u8,
) -> Result<String, SshCommandError> {
let mut s = String::new();
let mut counter = 0;
loop {
match (|| -> Result<(), SshCommandError> {
let tcp =
TcpStream::connect(format!("{}:22", ip)).map_err(SshCommandError::Connection)?;
let mut sess = Session::new().unwrap();
sess.set_tcp_stream(tcp);
sess.handshake().map_err(SshCommandError::Handshake)?;
sess.userauth_password(&auth.username, &auth.password)
.map_err(SshCommandError::Authentication)?;
assert!(sess.authenticated());
let mut channel = sess
.channel_session()
.map_err(SshCommandError::ChannelSession)?;
channel.exec(command).map_err(SshCommandError::Command)?;
// Intentionally ignore these results here as their failure
// does not precipitate a repeat
let _ = channel.read_to_string(&mut s);
let _ = channel.close();
let _ = channel.wait_close();
Ok(())
})() {
Ok(_) => break,
Err(e) => {
counter += 1;
if counter >= retries {
eprintln!(
"\n\n==== Start ssh command output (FAILED) ====\n\n\
command=\"{}\"\n\
auth=\"{:#?}\"\n\
ip=\"{}\"\n\
output=\"{}\"\n\
error=\"{:?}\"\n\
\n==== End ssh command outout ====\n\n",
command, auth, ip, s, e
);
return Err(e);
}
}
};
thread::sleep(std::time::Duration::new((timeout * counter).into(), 0));
}
Ok(s)
}
pub fn ssh_command_ip(
command: &str,
ip: &str,
retries: u8,
timeout: u8,
) -> Result<String, SshCommandError> {
ssh_command_ip_with_auth(
command,
&PasswordAuth {
username: String::from("cloud"),
password: String::from("cloud123"),
},
ip,
retries,
timeout,
)
}