138 lines
3.1 KiB
Go
138 lines
3.1 KiB
Go
package render
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import (
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"errors"
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"fmt"
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"net"
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"path/filepath"
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"strings"
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"git.g3e.fr/syonad/two/internal/lab/topology"
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)
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const (
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QEMUBinary = "qemu-system-x86_64"
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AdminInterface = topology.ReservedInterface
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AdminAddress = "10.0.2.15/24"
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AdminGateway = "10.0.2.2"
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AdminDNS = "10.0.2.3"
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DiskFile = "disk.qcow2"
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SeedFile = "seed.iso"
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ConsoleFile = "console.log"
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QMPFile = "qmp.sock"
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PIDFile = "qemu.pid"
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)
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var Nameservers = []string{"1.1.1.1", "8.8.8.8"}
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type Options struct {
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RunDir string
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AuthorizedKeys []string
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FRR map[string]string
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}
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type Node struct {
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Name string
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Dir string
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QEMU []string
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MetaData []byte
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UserData []byte
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NetworkConfig []byte
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}
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func Render(p *topology.Plan, o Options) ([]Node, error) {
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if err := o.validate(); err != nil {
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return nil, err
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}
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for _, n := range p.Nodes {
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if _, ok := o.FRR[n.Name]; n.FRR != "" && !ok {
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return nil, fmt.Errorf("node %s: frr configuration %s was not read", n.Name, n.FRR)
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}
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}
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var nodes []Node
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for index, n := range p.Nodes {
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dir := filepath.Join(o.RunDir, n.Name)
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meta, err := metaData(p, n)
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if err != nil {
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return nil, err
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}
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user, err := userData(p, n, o)
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if err != nil {
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return nil, err
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}
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network, err := networkConfig(p, n, index)
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if err != nil {
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return nil, err
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}
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nodes = append(nodes, Node{
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Name: n.Name,
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Dir: dir,
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QEMU: qemuArgs(p, n, index, dir),
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MetaData: meta,
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UserData: user,
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NetworkConfig: network,
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})
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}
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return nodes, nil
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}
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func (o Options) validate() error {
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var errs []error
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if !filepath.IsAbs(o.RunDir) {
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errs = append(errs, fmt.Errorf("run dir %q must be an absolute path", o.RunDir))
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}
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if len(o.AuthorizedKeys) == 0 {
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errs = append(errs, errors.New("at least one authorized ssh key is required"))
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}
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for i, k := range o.AuthorizedKeys {
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if strings.ContainsAny(k, "\r\n") {
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errs = append(errs, fmt.Errorf("authorized key %d spans several lines", i+1))
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continue
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}
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fields := strings.Fields(k)
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if len(fields) < 2 || !validKeyType(fields[0]) {
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errs = append(errs, fmt.Errorf("authorized key %d is not an ssh public key", i+1))
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}
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}
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return errors.Join(errs...)
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}
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func validKeyType(t string) bool {
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return strings.HasPrefix(t, "ssh-") || strings.HasPrefix(t, "ecdsa-sha2-") || strings.HasPrefix(t, "sk-")
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}
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func adminMAC(index int) net.HardwareAddr {
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return net.HardwareAddr{0x02, 0x4d, byte(index >> 8), byte(index), 0x00, 0x00}
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}
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func nodeCables(p *topology.Plan, name string) []topology.Cable {
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var out []topology.Cable
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for _, c := range p.Cables {
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if c.Node == name {
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out = append(out, c)
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}
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}
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return out
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}
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func switchCables(p *topology.Plan, name string) []topology.Cable {
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var out []topology.Cable
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for _, c := range p.Cables {
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if c.Switch == name {
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out = append(out, c)
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}
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}
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return out
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}
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func switchSegments(p *topology.Plan, name string) []topology.SegmentPlan {
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var out []topology.SegmentPlan
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for _, s := range p.Segments {
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if s.Switch == name {
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out = append(out, s)
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}
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}
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return out
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}
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