mirror of
https://github.com/getcompanion-ai/computer-host.git
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83 lines
2.2 KiB
Go
83 lines
2.2 KiB
Go
package firecracker
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import (
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"fmt"
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"net"
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"net/netip"
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"path/filepath"
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"strings"
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sdk "github.com/firecracker-microvm/firecracker-go-sdk"
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models "github.com/firecracker-microvm/firecracker-go-sdk/client/models"
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)
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func buildSDKConfig(spec MachineSpec, paths machinePaths, network NetworkAllocation, runtime RuntimeConfig) (sdk.Config, error) {
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if err := spec.Validate(); err != nil {
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return sdk.Config{}, err
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}
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if runtime.FirecrackerBinaryPath == "" {
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return sdk.Config{}, fmt.Errorf("firecracker binary path is required")
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}
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drives := sdk.NewDrivesBuilder(spec.RootFSPath)
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for _, drive := range spec.Drives {
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drives = drives.AddDrive(
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drive.Path,
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drive.ReadOnly,
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sdk.WithDriveID(strings.TrimSpace(drive.ID)),
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)
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}
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cfg := sdk.Config{
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SocketPath: paths.SocketName,
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KernelImagePath: spec.KernelImagePath,
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KernelArgs: strings.TrimSpace(spec.KernelArgs),
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Drives: drives.Build(),
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NetworkInterfaces: sdk.NetworkInterfaces{{
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StaticConfiguration: &sdk.StaticNetworkConfiguration{
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HostDevName: network.TapName,
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MacAddress: network.GuestMAC,
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IPConfiguration: &sdk.IPConfiguration{
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IPAddr: toIPNet(network.GuestCIDR),
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Gateway: net.ParseIP(network.GatewayIP.String()),
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Nameservers: nil,
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},
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},
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}},
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MachineCfg: models.MachineConfiguration{
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VcpuCount: sdk.Int64(spec.VCPUs),
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MemSizeMib: sdk.Int64(spec.MemoryMiB),
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Smt: sdk.Bool(false),
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},
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JailerCfg: &sdk.JailerConfig{
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GID: sdk.Int(runtime.JailerGID),
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UID: sdk.Int(runtime.JailerUID),
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ID: string(spec.ID),
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NumaNode: sdk.Int(runtime.NumaNode),
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ExecFile: runtime.FirecrackerBinaryPath,
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JailerBinary: runtime.JailerBinaryPath,
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ChrootBaseDir: paths.JailerBaseDir,
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ChrootStrategy: sdk.NewNaiveChrootStrategy(filepath.Clean(spec.KernelImagePath)),
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},
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VMID: string(spec.ID),
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}
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if spec.Vsock != nil {
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cfg.VsockDevices = []sdk.VsockDevice{{
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ID: spec.Vsock.ID,
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Path: spec.Vsock.Path,
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CID: spec.Vsock.CID,
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}}
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}
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return cfg, nil
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}
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func toIPNet(prefix netip.Prefix) net.IPNet {
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bits := prefix.Bits()
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return net.IPNet{
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IP: net.ParseIP(prefix.Addr().String()),
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Mask: net.CIDRMask(bits, 32),
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}
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}
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