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ci: Add integration test for VM migration
Now that we have multiple virtio devices supporting snapshot and restore operations, we can add a new integration test to validate the migration feature works as expected. The important part is virtio-net as it is used to ssh into the VM to verify the VM has been restored in the proper state. This test only works for virtio-mmio for now. Further support for testing virtio-pci will be added once the virtio-pci transport layer will support migration. Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
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@ -417,6 +417,13 @@ mod tests {
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)
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)
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}
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}
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// Creates the directory and returns the path.
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fn temp_snapshot_dir_path(tmp_dir: &TempDir) -> String {
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let snapshot_dir = String::from(tmp_dir.path().join("snapshot").to_str().unwrap());
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std::fs::create_dir(&snapshot_dir).unwrap();
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snapshot_dir
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}
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fn prepare_vhost_user_net_daemon(
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fn prepare_vhost_user_net_daemon(
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tmp_dir: &TempDir,
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tmp_dir: &TempDir,
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ip: &str,
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ip: &str,
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@ -4035,4 +4042,135 @@ mod tests {
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Ok(())
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Ok(())
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});
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});
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}
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}
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// One thing to note about this test. The virtio-net device is heavily used
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// through each ssh command. There's no need to perform a dedicated test to
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// verify the migration went well for virtio-net.
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#[cfg_attr(feature = "mmio", test)]
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fn test_snapshot_restore() {
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test_block!(tb, "", {
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let mut clear = ClearDiskConfig::new();
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let guest = Guest::new(&mut clear);
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let mut workload_path = dirs::home_dir().unwrap();
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workload_path.push("workloads");
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let mut kernel_path = workload_path;
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kernel_path.push("bzImage");
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let api_socket = temp_api_path(&guest.tmp_dir);
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let mut child = GuestCommand::new(&guest)
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.args(&["--api-socket", &api_socket])
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.args(&["--cpus", "boot=4"])
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.args(&["--memory", "size=4G"])
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.args(&["--kernel", kernel_path.to_str().unwrap()])
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.default_disks()
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.default_net()
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.args(&["--cmdline", CLEAR_KERNEL_CMDLINE])
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.capture_output()
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.spawn()
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.unwrap();
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thread::sleep(std::time::Duration::new(20, 0));
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// Check the number of vCPUs
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aver_eq!(tb, guest.get_cpu_count().unwrap_or_default(), 4);
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// Check the guest RAM
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aver!(tb, guest.get_total_memory().unwrap_or_default() > 3_968_000);
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// Check if the block device is readable
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aver!(
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tb,
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guest
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.ssh_command("dd if=/dev/vda of=/dev/null bs=1M iflag=direct count=1024")
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.is_ok()
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);
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// Check if the rng device is readable
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aver!(
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tb,
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guest
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.ssh_command("head -c 1000 /dev/hwrng > /dev/null")
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.is_ok()
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);
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// Check if the console is usable
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let console_text = String::from("On a branch floating down river a cricket, singing.");
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let console_cmd = format!("echo {} | sudo tee /dev/hvc0", console_text);
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aver!(tb, guest.ssh_command(&console_cmd).is_ok());
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// Pause the VM
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aver!(tb, remote_command(&api_socket, "pause", None));
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// Create the snapshot directory
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let snapshot_dir = temp_snapshot_dir_path(&guest.tmp_dir);
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// Take a snapshot from the VM
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aver!(
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tb,
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remote_command(
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&api_socket,
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"snapshot",
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Some(format!("file://{}", snapshot_dir).as_str()),
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)
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);
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// Wait to make sure the snapshot is completed
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thread::sleep(std::time::Duration::new(10, 0));
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// Shutdown the source VM and check console output
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let _ = child.kill();
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match child.wait_with_output() {
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Ok(out) => {
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aver!(
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tb,
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String::from_utf8_lossy(&out.stdout).contains(&console_text)
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);
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}
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Err(_) => aver!(tb, false),
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}
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// Restore the VM from the snapshot
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let mut child = GuestCommand::new(&guest)
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.args(&["--api-socket", &api_socket])
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.args(&[
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"--restore",
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format!("source_url=file://{}", snapshot_dir).as_str(),
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])
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.capture_output()
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.spawn()
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.unwrap();
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// Wait for the VM to be restored
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thread::sleep(std::time::Duration::new(10, 0));
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// Perform same checks to validate VM has been properly restored
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aver_eq!(tb, guest.get_cpu_count().unwrap_or_default(), 4);
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aver!(tb, guest.get_total_memory().unwrap_or_default() > 3_968_000);
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aver!(
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tb,
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guest
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.ssh_command("dd if=/dev/vda of=/dev/null bs=1M iflag=direct count=1024")
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.is_ok()
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);
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aver!(
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tb,
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guest
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.ssh_command("head -c 1000 /dev/hwrng > /dev/null")
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.is_ok()
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);
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aver!(tb, guest.ssh_command(&console_cmd).is_ok());
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// Shutdown the target VM and check console output
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let _ = child.kill();
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match child.wait_with_output() {
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Ok(out) => {
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aver!(
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tb,
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String::from_utf8_lossy(&out.stdout).contains(&console_text)
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);
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}
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Err(_) => aver!(tb, false),
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}
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Ok(())
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});
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}
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}
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}
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