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main.go
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main.go
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// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.
package maintenance
import (
"context"
"crypto/tls"
"fmt"
"log"
"net"
"net/netip"
"time"
"github.com/cosi-project/runtime/pkg/resource"
"github.com/cosi-project/runtime/pkg/state"
ttls "github.com/siderolabs/crypto/tls"
"github.com/siderolabs/crypto/x509"
"github.com/siderolabs/gen/slices"
"github.com/siderolabs/gen/value"
"github.com/siderolabs/go-procfs/procfs"
"google.golang.org/grpc"
"google.golang.org/grpc/credentials"
"github.com/siderolabs/talos/internal/app/machined/pkg/runtime"
"github.com/siderolabs/talos/internal/app/maintenance/server"
"github.com/siderolabs/talos/pkg/grpc/factory"
"github.com/siderolabs/talos/pkg/grpc/gen"
"github.com/siderolabs/talos/pkg/grpc/middleware/authz"
"github.com/siderolabs/talos/pkg/machinery/constants"
"github.com/siderolabs/talos/pkg/machinery/resources/network"
)
var ctrl runtime.Controller
// InjectController is used to pass the controller into the maintenance service.
func InjectController(c runtime.Controller) {
ctrl = c
}
// Run executes the configuration receiver, returning any configuration it receives.
//
//nolint:gocyclo
func Run(ctx context.Context, logger *log.Logger) ([]byte, error) {
if ctrl == nil {
return nil, fmt.Errorf("controller is not injected")
}
logger.Println("waiting for network address to be ready")
if err := network.NewReadyCondition(ctrl.Runtime().State().V1Alpha2().Resources(), network.AddressReady).Wait(ctx); err != nil {
return nil, fmt.Errorf("error waiting for the network to be ready: %w", err)
}
var sideroLinkAddress netip.Addr
currentAddresses, err := ctrl.Runtime().State().V1Alpha2().Resources().WatchFor(ctx,
resource.NewMetadata(network.NamespaceName, network.NodeAddressType, network.NodeAddressCurrentID, resource.VersionUndefined),
sideroLinkAddressFinder(&sideroLinkAddress, logger),
)
if err != nil {
return nil, fmt.Errorf("error getting node addresses: %w", err)
}
ips := currentAddresses.(*network.NodeAddress).TypedSpec().IPs()
// hostname might not be available yet, so use it only if it is available
hostnameStatus, err := ctrl.Runtime().State().V1Alpha2().Resources().Get(ctx, resource.NewMetadata(network.NamespaceName, network.HostnameStatusType, network.HostnameID, resource.VersionUndefined))
if err != nil && !state.IsNotFoundError(err) {
return nil, fmt.Errorf("error getting node hostname: %w", err)
}
var dnsNames []string
if hostnameStatus != nil {
dnsNames = hostnameStatus.(*network.HostnameStatus).TypedSpec().DNSNames()
}
tlsConfig, provider, err := genTLSConfig(ips, dnsNames)
if err != nil {
return nil, err
}
cert, err := provider.GetCertificate(nil)
if err != nil {
return nil, err
}
certFingerprint, err := x509.SPKIFingerprintFromDER(cert.Certificate[0])
if err != nil {
return nil, err
}
cfgCh := make(chan []byte)
s := server.New(ctrl, logger, cfgCh)
injector := &authz.Injector{
Mode: authz.ReadOnly,
Logger: log.New(logger.Writer(), "machined/authz/injector ", log.Flags()).Printf,
}
// Start the server.
server := factory.NewServer(
s,
factory.WithDefaultLog(),
factory.ServerOptions(
grpc.Creds(
credentials.NewTLS(tlsConfig),
),
),
factory.WithUnaryInterceptor(injector.UnaryInterceptor()),
factory.WithStreamInterceptor(injector.StreamInterceptor()),
)
listener, err := factory.NewListener(factory.Address(formatIP(sideroLinkAddress)), factory.Port(constants.ApidPort))
if err != nil {
return nil, err
}
defer server.GracefulStop()
go func() {
//nolint:errcheck
server.Serve(listener)
}()
if !value.IsZero(sideroLinkAddress) {
ips = []netip.Addr{sideroLinkAddress}
}
logger.Println("this machine is reachable at:")
for _, ip := range ips {
logger.Printf("\t%s", ip.String())
}
firstIP := "<IP>"
if len(ips) > 0 {
firstIP = ips[0].String()
}
logger.Println("server certificate fingerprint:")
logger.Printf("\t%s", certFingerprint)
logger.Println()
logger.Println("upload configuration using talosctl:")
logger.Printf("\ttalosctl apply-config --insecure --nodes %s --file <config.yaml>", firstIP)
logger.Println("or apply configuration using talosctl interactive installer:")
logger.Printf("\ttalosctl apply-config --insecure --nodes %s --mode=interactive", firstIP)
logger.Println("optionally with node fingerprint check:")
logger.Printf("\ttalosctl apply-config --insecure --nodes %s --cert-fingerprint '%s' --file <config.yaml>", firstIP, certFingerprint)
select {
case cfg := <-cfgCh:
shutdownCtx, shutdownCancel := context.WithTimeout(ctx, 5*time.Second)
defer shutdownCancel()
factory.ServerGracefulStop(server, shutdownCtx)
return cfg, err
case <-ctx.Done():
return nil, ctx.Err()
}
}
func formatIP(addr netip.Addr) string {
if value.IsZero(addr) {
return ""
}
return addr.String()
}
func genTLSConfig(ips []netip.Addr, dnsNames []string) (tlsConfig *tls.Config, provider ttls.CertificateProvider, err error) {
ca, err := x509.NewSelfSignedCertificateAuthority()
if err != nil {
return nil, nil, fmt.Errorf("failed to generate self-signed CA: %w", err)
}
ips = append(ips, netip.MustParseAddr("127.0.0.1"), netip.MustParseAddr("::1"))
netIPs := slices.Map(ips, func(ip netip.Addr) net.IP { return ip.AsSlice() })
var generator ttls.Generator
generator, err = gen.NewLocalGenerator(ca.KeyPEM, ca.CrtPEM)
if err != nil {
return nil, nil, fmt.Errorf("failed to create local generator provider: %w", err)
}
provider, err = ttls.NewRenewingCertificateProvider(generator, x509.DNSNames(dnsNames), x509.IPAddresses(netIPs))
if err != nil {
return nil, nil, fmt.Errorf("failed to create local certificate provider: %w", err)
}
caCertPEM, err := provider.GetCA()
if err != nil {
return nil, nil, fmt.Errorf("failed to get CA: %w", err)
}
tlsConfig, err = ttls.New(
ttls.WithClientAuthType(ttls.ServerOnly),
ttls.WithCACertPEM(caCertPEM),
ttls.WithServerCertificateProvider(provider),
)
if err != nil {
return nil, nil, fmt.Errorf("failed to generate tlsconfig: %w", err)
}
return tlsConfig, provider, nil
}
func sideroLinkAddressFinder(address *netip.Addr, logger *log.Logger) state.WatchForConditionFunc {
sideroLinkEnabled := false
if procfs.ProcCmdline().Get(constants.KernelParamSideroLink).First() != nil {
sideroLinkEnabled = true
logger.Println(constants.KernelParamSideroLink + " is enabled, waiting for address")
}
return state.WithCondition(func(r resource.Resource) (bool, error) {
if resource.IsTombstone(r) {
return false, nil
}
if !sideroLinkEnabled {
return true, nil
}
ips := r.(*network.NodeAddress).TypedSpec().IPs()
for _, ip := range ips {
if network.IsULA(ip, network.ULASideroLink) {
*address = ip
return true, nil
}
}
return false, nil
})
}