go/firecracker-netns
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I understand that it's an antipattern, but it's convenient.

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Signed-off-by: RouxAntoine <antoinroux@hotmail.fr>
This commit is contained in:
RouxAntoine 2024-01-05 14:49:34 +01:00
parent d870be5ace
commit 0ce44f6e7b
Signed by: antoine
GPG Key ID: 098FB66FC0475E70
2 changed files with 14 additions and 13 deletions
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11
cmd/main.go
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@ -89,17 +89,18 @@ func setupEnv() int {
cpuCount := int64(4) cpuCount := int64(4)
memorySize := int64(1024) memorySize := int64(1024)
isSmt := true isSmt := true
socketPath := "/tmp/firecracker.socket"
cfg := firecracker.Config{ cfg := firecracker.Config{
SocketPath: "/tmp/firecracker.socket", SocketPath: socketPath,
KernelImagePath: "./vmlinux-5.10.204", KernelImagePath: "./out/vmlinux-5.10.204",
LogPath: "./firecracker.log", LogPath: "./out/firecracker.log",
LogLevel: "Debug", LogLevel: "Debug",
KernelArgs: "console=ttyS0 reboot=k panic=1 pci=off", KernelArgs: "console=ttyS0 reboot=k panic=1 pci=off",
Drives: []models.Drive{ Drives: []models.Drive{
{ {
DriveID: firecracker.String("rootfs"), DriveID: firecracker.String("rootfs"),
PathOnHost: firecracker.String("./ubuntu-22.04.ext4"), PathOnHost: firecracker.String("./out/ubuntu-22.04.ext4"),
IsReadOnly: firecracker.Bool(false), IsReadOnly: firecracker.Bool(false),
IsRootDevice: firecracker.Bool(true), IsRootDevice: firecracker.Bool(true),
}, },
@ -130,7 +131,7 @@ func setupEnv() int {
firecracker.WithProcessRunner( firecracker.WithProcessRunner(
firecracker.VMCommandBuilder{}. firecracker.VMCommandBuilder{}.
WithBin("firecracker"). WithBin("firecracker").
WithSocketPath("/tmp/firecracker.socket"). WithSocketPath(socketPath).
//WithStdin(os.Stdin). //WithStdin(os.Stdin).
//WithStdout(os.Stdout). //WithStdout(os.Stdout).
//WithStderr(os.Stderr). //WithStderr(os.Stderr).

16
rootf-kernel/rootfs.sh
View File

@ -2,14 +2,14 @@
# inspired by https://github.com/oraoto/archlinux-firecracker/blob/master/scripts/build-arch-rootfs.sh # inspired by https://github.com/oraoto/archlinux-firecracker/blob/master/scripts/build-arch-rootfs.sh
DISK_SIZE=4G DISK_SIZE=10G
DISK_FILE=../output/arch-rootfs.ext4 DISK_FILE=../out/arch-rootfs.ext4
DISK_ROOT=../output/mount DISK_ROOT=../out/mount
cd $(dirname "${BASH_SOURCE[0]}") cd $(dirname "${BASH_SOURCE[0]}")
# Allocate rootfs disk # Allocate rootfs disk
fallocate -l 4G $DISK_FILE dd if=/dev/zero of="$DISK_FILE" bs=1M count="$DISK_SIZE"
mkfs.ext4 $DISK_FILE mkfs.ext4 $DISK_FILE
# Mount rootfs to mount # Mount rootfs to mount
@ -17,13 +17,13 @@ mkdir -p $DISK_ROOT
sudo mount $DISK_FILE $DISK_ROOT sudo mount $DISK_FILE $DISK_ROOT
yes y | sudo pacstrap -i -c $DISK_ROOT bash filesystem systemd-sysvcompat pacman iproute2 yes y | sudo pacstrap -i -c $DISK_ROOT bash filesystem systemd-sysvcompat pacman iproute2 git
echo "nameserver 1.1.1.1" | sudo tee $DISK_ROOT/etc/resolv.conf echo "nameserver 1.1.1.1" | sudo tee $DISK_ROOT/etc/resolv.conf
sudo tee $DISK_ROOT/etc/systemd/system/firecracker-network.service <<-'EOF' sudo tee $DISK_ROOT/etc/systemd/system/internal-network.service <<-'EOF'
[Unit] [Unit]
Description=Firecracker Network Description=Internal Network
[Service] [Service]
Type=oneshot Type=oneshot
@ -36,7 +36,7 @@ RemainAfterExit=yes
WantedBy=multi-user.target WantedBy=multi-user.target
EOF EOF
sudo ln -s /etc/systemd/system/firecracker-network.service $DISK_ROOT/etc/systemd/system/multi-user.target.wants/ sudo ln -s /etc/systemd/system/internal-network.service $DISK_ROOT/etc/systemd/system/multi-user.target.wants/
# Remove default (locked) root password # Remove default (locked) root password
# See https://github.com/archlinux/svntogit-packages/commit/0320c909f3867d47576083e853543bab1705185b # See https://github.com/archlinux/svntogit-packages/commit/0320c909f3867d47576083e853543bab1705185b