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trustd.go
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trustd.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/.
//nolint:golint
package services
import (
"context"
"errors"
"fmt"
"net"
"os"
"path/filepath"
"github.com/containerd/containerd/oci"
"github.com/containerd/containerd/pkg/cap"
"github.com/cosi-project/runtime/api/v1alpha1"
"github.com/cosi-project/runtime/pkg/state"
"github.com/cosi-project/runtime/pkg/state/protobuf/server"
specs "github.com/opencontainers/runtime-spec/specs-go"
"github.com/siderolabs/go-debug"
"google.golang.org/grpc"
"github.com/aenix-io/talm/internal/app/machined/pkg/runtime"
"github.com/aenix-io/talm/internal/app/machined/pkg/system"
"github.com/aenix-io/talm/internal/app/machined/pkg/system/events"
"github.com/aenix-io/talm/internal/app/machined/pkg/system/health"
"github.com/aenix-io/talm/internal/app/machined/pkg/system/runner"
"github.com/aenix-io/talm/internal/app/machined/pkg/system/runner/containerd"
"github.com/aenix-io/talm/internal/app/machined/pkg/system/runner/restart"
"github.com/aenix-io/talm/internal/pkg/environment"
"github.com/siderolabs/talos/pkg/conditions"
"github.com/siderolabs/talos/pkg/machinery/constants"
"github.com/siderolabs/talos/pkg/machinery/resources/network"
"github.com/siderolabs/talos/pkg/machinery/resources/secrets"
timeresource "github.com/siderolabs/talos/pkg/machinery/resources/time"
)
var _ system.HealthcheckedService = (*Trustd)(nil)
// Trustd implements the Service interface. It serves as the concrete type with
// the required methods.
type Trustd struct {
runtimeServer *grpc.Server
}
// ID implements the Service interface.
func (t *Trustd) ID(r runtime.Runtime) string {
return "trustd"
}
// PreFunc implements the Service interface.
//
//nolint:gocyclo
func (t *Trustd) PreFunc(ctx context.Context, r runtime.Runtime) error {
// filter apid access to make sure apid can only access its certificates
resources := state.Filter(
r.State().V1Alpha2().Resources(),
func(ctx context.Context, access state.Access) error {
if !access.Verb.Readonly() {
return errors.New("write access denied")
}
switch {
case access.ResourceNamespace == secrets.NamespaceName && access.ResourceType == secrets.TrustdType && access.ResourceID == secrets.TrustdID:
case access.ResourceNamespace == secrets.NamespaceName && access.ResourceType == secrets.OSRootType && access.ResourceID == secrets.OSRootID:
default:
return errors.New("access denied")
}
return nil
},
)
// ensure socket dir exists
if err := os.MkdirAll(filepath.Dir(constants.TrustdRuntimeSocketPath), 0o750); err != nil {
return err
}
// set the final leaf to be world-executable to make trustd connect to the socket
if err := os.Chmod(filepath.Dir(constants.TrustdRuntimeSocketPath), 0o751); err != nil {
return err
}
// clean up the socket if it already exists (important for Talos in a container)
if err := os.RemoveAll(constants.TrustdRuntimeSocketPath); err != nil {
return err
}
listener, err := net.Listen("unix", constants.TrustdRuntimeSocketPath)
if err != nil {
return err
}
// chown the socket path to make it accessible to the apid
if err := os.Chown(constants.TrustdRuntimeSocketPath, constants.TrustdUserID, constants.TrustdUserID); err != nil {
return err
}
t.runtimeServer = grpc.NewServer(
grpc.SharedWriteBuffer(true),
)
v1alpha1.RegisterStateServer(t.runtimeServer, server.NewState(resources))
go t.runtimeServer.Serve(listener) //nolint:errcheck
return prepareRootfs(t.ID(r))
}
// PostFunc implements the Service interface.
func (t *Trustd) PostFunc(r runtime.Runtime, state events.ServiceState) (err error) {
t.runtimeServer.Stop()
return os.RemoveAll(constants.TrustdRuntimeSocketPath)
}
// Condition implements the Service interface.
func (t *Trustd) Condition(r runtime.Runtime) conditions.Condition {
return conditions.WaitForAll(
timeresource.NewSyncCondition(r.State().V1Alpha2().Resources()),
network.NewReadyCondition(r.State().V1Alpha2().Resources(), network.AddressReady, network.HostnameReady),
)
}
// DependsOn implements the Service interface.
func (t *Trustd) DependsOn(r runtime.Runtime) []string {
return []string{"containerd"}
}
// Runner implements the Service interface.
func (t *Trustd) Runner(r runtime.Runtime) (runner.Runner, error) {
// Set the process arguments.
args := runner.Args{
ID: t.ID(r),
ProcessArgs: []string{"/trustd"},
}
// Set the mounts.
mounts := []specs.Mount{
{Type: "bind", Destination: "/tmp", Source: "/tmp", Options: []string{"rbind", "rshared", "rw"}},
{Type: "bind", Destination: filepath.Dir(constants.TrustdRuntimeSocketPath), Source: filepath.Dir(constants.TrustdRuntimeSocketPath), Options: []string{"rbind", "ro"}},
}
env := environment.Get(r.Config())
env = append(env, constants.TcellMinimizeEnvironment)
if debug.RaceEnabled {
env = append(env, "GORACE=halt_on_error=1")
}
return restart.New(containerd.NewRunner(
r.Config().Debug(),
&args,
runner.WithLoggingManager(r.Logging()),
runner.WithContainerdAddress(constants.SystemContainerdAddress),
runner.WithEnv(env),
runner.WithOCISpecOpts(
containerd.WithMemoryLimit(int64(1000000*512)),
oci.WithDroppedCapabilities(cap.Known()),
oci.WithHostNamespace(specs.NetworkNamespace),
oci.WithMounts(mounts),
oci.WithRootFSPath(filepath.Join(constants.SystemLibexecPath, t.ID(r))),
oci.WithRootFSReadonly(),
oci.WithUser(fmt.Sprintf("%d:%d", constants.TrustdUserID, constants.TrustdUserID)),
),
runner.WithOOMScoreAdj(-998),
),
restart.WithType(restart.Forever),
), nil
}
// HealthFunc implements the HealthcheckedService interface.
func (t *Trustd) HealthFunc(runtime.Runtime) health.Check {
return func(ctx context.Context) error {
var d net.Dialer
conn, err := d.DialContext(ctx, "tcp", fmt.Sprintf("%s:%d", "127.0.0.1", constants.TrustdPort))
if err != nil {
return err
}
return conn.Close()
}
}
// HealthSettings implements the HealthcheckedService interface.
func (t *Trustd) HealthSettings(runtime.Runtime) *health.Settings {
return &health.DefaultSettings
}