crosvm/tools/examples/example_network
Dennis Kempin df640d068c Add functional crosvm examples for running on linux
Two examples are added. A simple one and one with network
configured.

The examples are written in a way they can be integrated
with the mdbook to form a tutorial. This will ensure the
tutorial code snippets stay up to date.

The documentation for networking is added after
https://crrev.com/c/3237468 is merged.

BUG=b:214104901
TEST=./tools/examples/example_simple

Change-Id: I33682878858d8a0324fbb6a87e33cd55b29811b7
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/3388063
Reviewed-by: Alexandre Courbot <acourbot@chromium.org>
Commit-Queue: Dennis Kempin <denniskempin@google.com>
Tested-by: Dennis Kempin <denniskempin@google.com>
Tested-by: kokoro <noreply+kokoro@google.com>
2022-01-18 23:24:00 +00:00

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#!/bin/bash
# Copyright 2022 The Chromium OS Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
# Example VM with internet access and sshd
set -e
SRC=$(realpath "$(dirname "${BASH_SOURCE[0]}")")
mkdir -p "$SRC/images/network" && cd "$_"
if ! [ -f rootfs ]; then
# ANCHOR: build
builder_args=(
# Create user with no password.
--run-command "useradd -m -g sudo -p '' $USER ; chage -d 0 $USER"
# Configure network via netplan config in 01-netcfg.yaml
--hostname crosvm-test
--copy-in "$SRC/guest/01-netcfg.yaml:/etc/netplan/"
# Install sshd and authorized key for the user.
--install openssh-server
--ssh-inject "$USER:file:$HOME/.ssh/id_rsa.pub"
-o rootfs
)
virt-builder ubuntu-20.04 "${builder_args[@]}"
# ANCHOR_END: build
virt-builder --get-kernel ./rootfs -o .
fi
# ANCHOR: run
# Use the previously configured crosvm_tap device for networking.
cargo run -- run \
--disable-sandbox \
--rwroot ./rootfs \
--initrd ./initrd.img-* \
--tap-name crosvm_tap \
-p "root=/dev/vda5" \
./vmlinuz-*
# ANCHOR_END: run