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path: root/libpod/oci_conmon_linux.go
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Diffstat (limited to 'libpod/oci_conmon_linux.go')
-rw-r--r--libpod/oci_conmon_linux.go1657
1 files changed, 43 insertions, 1614 deletions
diff --git a/libpod/oci_conmon_linux.go b/libpod/oci_conmon_linux.go
index 1b654ed33..0964d4ea3 100644
--- a/libpod/oci_conmon_linux.go
+++ b/libpod/oci_conmon_linux.go
@@ -1,46 +1,21 @@
-//go:build linux
-// +build linux
-
package libpod
import (
- "bufio"
- "bytes"
- "context"
- "errors"
"fmt"
- "io"
- "io/ioutil"
- "net"
- "net/http"
"os"
"os/exec"
"path/filepath"
"runtime"
- "strconv"
"strings"
- "sync"
- "syscall"
- "text/template"
- "time"
runcconfig "github.com/opencontainers/runc/libcontainer/configs"
"github.com/opencontainers/runc/libcontainer/devices"
"github.com/containers/common/pkg/cgroups"
"github.com/containers/common/pkg/config"
- "github.com/containers/common/pkg/resize"
- cutil "github.com/containers/common/pkg/util"
- conmonConfig "github.com/containers/conmon/runner/config"
- "github.com/containers/podman/v4/libpod/define"
- "github.com/containers/podman/v4/libpod/logs"
- "github.com/containers/podman/v4/pkg/checkpoint/crutils"
"github.com/containers/podman/v4/pkg/errorhandling"
"github.com/containers/podman/v4/pkg/rootless"
- "github.com/containers/podman/v4/pkg/specgenutil"
- "github.com/containers/podman/v4/pkg/util"
"github.com/containers/podman/v4/utils"
- "github.com/containers/storage/pkg/homedir"
pmount "github.com/containers/storage/pkg/mount"
spec "github.com/opencontainers/runtime-spec/specs-go"
"github.com/opencontainers/selinux/go-selinux/label"
@@ -48,782 +23,70 @@ import (
"golang.org/x/sys/unix"
)
-const (
- // This is Conmon's STDIO_BUF_SIZE. I don't believe we have access to it
- // directly from the Go code, so const it here
- // Important: The conmon attach socket uses an extra byte at the beginning of each
- // message to specify the STREAM so we have to increase the buffer size by one
- bufferSize = conmonConfig.BufSize + 1
-)
-
-// ConmonOCIRuntime is an OCI runtime managed by Conmon.
-// TODO: Make all calls to OCI runtime have a timeout.
-type ConmonOCIRuntime struct {
- name string
- path string
- conmonPath string
- conmonEnv []string
- tmpDir string
- exitsDir string
- logSizeMax int64
- noPivot bool
- reservePorts bool
- runtimeFlags []string
- supportsJSON bool
- supportsKVM bool
- supportsNoCgroups bool
- enableKeyring bool
-}
-
-// Make a new Conmon-based OCI runtime with the given options.
-// Conmon will wrap the given OCI runtime, which can be `runc`, `crun`, or
-// any runtime with a runc-compatible CLI.
-// The first path that points to a valid executable will be used.
-// Deliberately private. Someone should not be able to construct this outside of
-// libpod.
-func newConmonOCIRuntime(name string, paths []string, conmonPath string, runtimeFlags []string, runtimeCfg *config.Config) (OCIRuntime, error) {
- if name == "" {
- return nil, fmt.Errorf("the OCI runtime must be provided a non-empty name: %w", define.ErrInvalidArg)
- }
-
- // Make lookup tables for runtime support
- supportsJSON := make(map[string]bool, len(runtimeCfg.Engine.RuntimeSupportsJSON))
- supportsNoCgroups := make(map[string]bool, len(runtimeCfg.Engine.RuntimeSupportsNoCgroups))
- supportsKVM := make(map[string]bool, len(runtimeCfg.Engine.RuntimeSupportsKVM))
- for _, r := range runtimeCfg.Engine.RuntimeSupportsJSON {
- supportsJSON[r] = true
- }
- for _, r := range runtimeCfg.Engine.RuntimeSupportsNoCgroups {
- supportsNoCgroups[r] = true
- }
- for _, r := range runtimeCfg.Engine.RuntimeSupportsKVM {
- supportsKVM[r] = true
- }
-
- runtime := new(ConmonOCIRuntime)
- runtime.name = name
- runtime.conmonPath = conmonPath
- runtime.runtimeFlags = runtimeFlags
-
- runtime.conmonEnv = runtimeCfg.Engine.ConmonEnvVars
- runtime.tmpDir = runtimeCfg.Engine.TmpDir
- runtime.logSizeMax = runtimeCfg.Containers.LogSizeMax
- runtime.noPivot = runtimeCfg.Engine.NoPivotRoot
- runtime.reservePorts = runtimeCfg.Engine.EnablePortReservation
- runtime.enableKeyring = runtimeCfg.Containers.EnableKeyring
-
- // TODO: probe OCI runtime for feature and enable automatically if
- // available.
-
- base := filepath.Base(name)
- runtime.supportsJSON = supportsJSON[base]
- runtime.supportsNoCgroups = supportsNoCgroups[base]
- runtime.supportsKVM = supportsKVM[base]
-
- foundPath := false
- for _, path := range paths {
- stat, err := os.Stat(path)
- if err != nil {
- if os.IsNotExist(err) {
- continue
- }
- return nil, fmt.Errorf("cannot stat OCI runtime %s path: %w", name, err)
- }
- if !stat.Mode().IsRegular() {
- continue
- }
- foundPath = true
- logrus.Tracef("found runtime %q", path)
- runtime.path = path
- break
- }
-
- // Search the $PATH as last fallback
- if !foundPath {
- if foundRuntime, err := exec.LookPath(name); err == nil {
- foundPath = true
- runtime.path = foundRuntime
- logrus.Debugf("using runtime %q from $PATH: %q", name, foundRuntime)
- }
- }
-
- if !foundPath {
- return nil, fmt.Errorf("no valid executable found for OCI runtime %s: %w", name, define.ErrInvalidArg)
- }
-
- runtime.exitsDir = filepath.Join(runtime.tmpDir, "exits")
-
- // Create the exit files and attach sockets directories
- if err := os.MkdirAll(runtime.exitsDir, 0750); err != nil {
- // The directory is allowed to exist
- if !os.IsExist(err) {
- return nil, fmt.Errorf("error creating OCI runtime exit files directory: %w", err)
- }
+func (r *ConmonOCIRuntime) createRootlessContainer(ctr *Container, restoreOptions *ContainerCheckpointOptions) (int64, error) {
+ type result struct {
+ restoreDuration int64
+ err error
}
- return runtime, nil
-}
-
-// Name returns the name of the runtime being wrapped by Conmon.
-func (r *ConmonOCIRuntime) Name() string {
- return r.name
-}
-
-// Path returns the path of the OCI runtime being wrapped by Conmon.
-func (r *ConmonOCIRuntime) Path() string {
- return r.path
-}
-
-// hasCurrentUserMapped checks whether the current user is mapped inside the container user namespace
-func hasCurrentUserMapped(ctr *Container) bool {
- if len(ctr.config.IDMappings.UIDMap) == 0 && len(ctr.config.IDMappings.GIDMap) == 0 {
- return true
- }
- uid := os.Geteuid()
- for _, m := range ctr.config.IDMappings.UIDMap {
- if uid >= m.HostID && uid < m.HostID+m.Size {
- return true
- }
- }
- return false
-}
-
-// CreateContainer creates a container.
-func (r *ConmonOCIRuntime) CreateContainer(ctr *Container, restoreOptions *ContainerCheckpointOptions) (int64, error) {
- // always make the run dir accessible to the current user so that the PID files can be read without
- // being in the rootless user namespace.
- if err := makeAccessible(ctr.state.RunDir, 0, 0); err != nil {
- return 0, err
- }
- if !hasCurrentUserMapped(ctr) {
- for _, i := range []string{ctr.state.RunDir, ctr.runtime.config.Engine.TmpDir, ctr.config.StaticDir, ctr.state.Mountpoint, ctr.runtime.config.Engine.VolumePath} {
- if err := makeAccessible(i, ctr.RootUID(), ctr.RootGID()); err != nil {
+ ch := make(chan result)
+ go func() {
+ runtime.LockOSThread()
+ restoreDuration, err := func() (int64, error) {
+ fd, err := os.Open(fmt.Sprintf("/proc/%d/task/%d/ns/mnt", os.Getpid(), unix.Gettid()))
+ if err != nil {
return 0, err
}
- }
+ defer errorhandling.CloseQuiet(fd)
- // if we are running a non privileged container, be sure to umount some kernel paths so they are not
- // bind mounted inside the container at all.
- if !ctr.config.Privileged && !rootless.IsRootless() {
- type result struct {
- restoreDuration int64
- err error
+ // create a new mountns on the current thread
+ if err = unix.Unshare(unix.CLONE_NEWNS); err != nil {
+ return 0, err
}
- ch := make(chan result)
- go func() {
- runtime.LockOSThread()
- restoreDuration, err := func() (int64, error) {
- fd, err := os.Open(fmt.Sprintf("/proc/%d/task/%d/ns/mnt", os.Getpid(), unix.Gettid()))
- if err != nil {
- return 0, err
- }
- defer errorhandling.CloseQuiet(fd)
-
- // create a new mountns on the current thread
- if err = unix.Unshare(unix.CLONE_NEWNS); err != nil {
- return 0, err
- }
- defer func() {
- if err := unix.Setns(int(fd.Fd()), unix.CLONE_NEWNS); err != nil {
- logrus.Errorf("Unable to clone new namespace: %q", err)
- }
- }()
-
- // don't spread our mounts around. We are setting only /sys to be slave
- // so that the cleanup process is still able to umount the storage and the
- // changes are propagated to the host.
- err = unix.Mount("/sys", "/sys", "none", unix.MS_REC|unix.MS_SLAVE, "")
- if err != nil {
- return 0, fmt.Errorf("cannot make /sys slave: %w", err)
- }
-
- mounts, err := pmount.GetMounts()
- if err != nil {
- return 0, err
- }
- for _, m := range mounts {
- if !strings.HasPrefix(m.Mountpoint, "/sys/kernel") {
- continue
- }
- err = unix.Unmount(m.Mountpoint, 0)
- if err != nil && !os.IsNotExist(err) {
- return 0, fmt.Errorf("cannot unmount %s: %w", m.Mountpoint, err)
- }
- }
- return r.createOCIContainer(ctr, restoreOptions)
- }()
- ch <- result{
- restoreDuration: restoreDuration,
- err: err,
+ defer func() {
+ if err := unix.Setns(int(fd.Fd()), unix.CLONE_NEWNS); err != nil {
+ logrus.Errorf("Unable to clone new namespace: %q", err)
}
}()
- r := <-ch
- return r.restoreDuration, r.err
- }
- }
- return r.createOCIContainer(ctr, restoreOptions)
-}
-
-// UpdateContainerStatus retrieves the current status of the container from the
-// runtime. It updates the container's state but does not save it.
-// If useRuntime is false, we will not directly hit runc to see the container's
-// status, but will instead only check for the existence of the conmon exit file
-// and update state to stopped if it exists.
-func (r *ConmonOCIRuntime) UpdateContainerStatus(ctr *Container) error {
- runtimeDir, err := util.GetRuntimeDir()
- if err != nil {
- return err
- }
-
- // Store old state so we know if we were already stopped
- oldState := ctr.state.State
- state := new(spec.State)
-
- cmd := exec.Command(r.path, "state", ctr.ID())
- cmd.Env = append(cmd.Env, fmt.Sprintf("XDG_RUNTIME_DIR=%s", runtimeDir))
-
- outPipe, err := cmd.StdoutPipe()
- if err != nil {
- return fmt.Errorf("getting stdout pipe: %w", err)
- }
- errPipe, err := cmd.StderrPipe()
- if err != nil {
- return fmt.Errorf("getting stderr pipe: %w", err)
- }
-
- if err := cmd.Start(); err != nil {
- out, err2 := ioutil.ReadAll(errPipe)
- if err2 != nil {
- return fmt.Errorf("error getting container %s state: %w", ctr.ID(), err)
- }
- if strings.Contains(string(out), "does not exist") || strings.Contains(string(out), "No such file") {
- if err := ctr.removeConmonFiles(); err != nil {
- logrus.Debugf("unable to remove conmon files for container %s", ctr.ID())
- }
- ctr.state.ExitCode = -1
- ctr.state.FinishedTime = time.Now()
- ctr.state.State = define.ContainerStateExited
- return ctr.runtime.state.AddContainerExitCode(ctr.ID(), ctr.state.ExitCode)
- }
- return fmt.Errorf("error getting container %s state. stderr/out: %s: %w", ctr.ID(), out, err)
- }
- defer func() {
- _ = cmd.Wait()
- }()
-
- if err := errPipe.Close(); err != nil {
- return err
- }
- out, err := ioutil.ReadAll(outPipe)
- if err != nil {
- return fmt.Errorf("error reading stdout: %s: %w", ctr.ID(), err)
- }
- if err := json.NewDecoder(bytes.NewBuffer(out)).Decode(state); err != nil {
- return fmt.Errorf("error decoding container status for container %s: %w", ctr.ID(), err)
- }
- ctr.state.PID = state.Pid
-
- switch state.Status {
- case "created":
- ctr.state.State = define.ContainerStateCreated
- case "paused":
- ctr.state.State = define.ContainerStatePaused
- case "running":
- ctr.state.State = define.ContainerStateRunning
- case "stopped":
- ctr.state.State = define.ContainerStateStopped
- default:
- return fmt.Errorf("unrecognized status returned by runtime for container %s: %s: %w",
- ctr.ID(), state.Status, define.ErrInternal)
- }
-
- // Only grab exit status if we were not already stopped
- // If we were, it should already be in the database
- if ctr.state.State == define.ContainerStateStopped && oldState != define.ContainerStateStopped {
- if _, err := ctr.Wait(context.Background()); err != nil {
- logrus.Errorf("Waiting for container %s to exit: %v", ctr.ID(), err)
- }
- return nil
- }
-
- // Handle ContainerStateStopping - keep it unless the container
- // transitioned to no longer running.
- if oldState == define.ContainerStateStopping && (ctr.state.State == define.ContainerStatePaused || ctr.state.State == define.ContainerStateRunning) {
- ctr.state.State = define.ContainerStateStopping
- }
-
- return nil
-}
-
-// StartContainer starts the given container.
-// Sets time the container was started, but does not save it.
-func (r *ConmonOCIRuntime) StartContainer(ctr *Container) error {
- // TODO: streams should probably *not* be our STDIN/OUT/ERR - redirect to buffers?
- runtimeDir, err := util.GetRuntimeDir()
- if err != nil {
- return err
- }
- env := []string{fmt.Sprintf("XDG_RUNTIME_DIR=%s", runtimeDir)}
- if path, ok := os.LookupEnv("PATH"); ok {
- env = append(env, fmt.Sprintf("PATH=%s", path))
- }
- if err := utils.ExecCmdWithStdStreams(os.Stdin, os.Stdout, os.Stderr, env, r.path, append(r.runtimeFlags, "start", ctr.ID())...); err != nil {
- return err
- }
-
- ctr.state.StartedTime = time.Now()
-
- return nil
-}
-
-// KillContainer sends the given signal to the given container.
-// If all is set, send to all PIDs in the container.
-// All is only supported if the container created cgroups.
-func (r *ConmonOCIRuntime) KillContainer(ctr *Container, signal uint, all bool) error {
- logrus.Debugf("Sending signal %d to container %s", signal, ctr.ID())
- runtimeDir, err := util.GetRuntimeDir()
- if err != nil {
- return err
- }
- env := []string{fmt.Sprintf("XDG_RUNTIME_DIR=%s", runtimeDir)}
- var args []string
- args = append(args, r.runtimeFlags...)
- if all {
- args = append(args, "kill", "--all", ctr.ID(), fmt.Sprintf("%d", signal))
- } else {
- args = append(args, "kill", ctr.ID(), fmt.Sprintf("%d", signal))
- }
- if err := utils.ExecCmdWithStdStreams(os.Stdin, os.Stdout, os.Stderr, env, r.path, args...); err != nil {
- // Update container state - there's a chance we failed because
- // the container exited in the meantime.
- if err2 := r.UpdateContainerStatus(ctr); err2 != nil {
- logrus.Infof("Error updating status for container %s: %v", ctr.ID(), err2)
- }
- if ctr.ensureState(define.ContainerStateStopped, define.ContainerStateExited) {
- return define.ErrCtrStateInvalid
- }
- return fmt.Errorf("error sending signal to container %s: %w", ctr.ID(), err)
- }
-
- return nil
-}
-
-// StopContainer stops a container, first using its given stop signal (or
-// SIGTERM if no signal was specified), then using SIGKILL.
-// Timeout is given in seconds. If timeout is 0, the container will be
-// immediately kill with SIGKILL.
-// Does not set finished time for container, assumes you will run updateStatus
-// after to pull the exit code.
-func (r *ConmonOCIRuntime) StopContainer(ctr *Container, timeout uint, all bool) error {
- logrus.Debugf("Stopping container %s (PID %d)", ctr.ID(), ctr.state.PID)
-
- // Ping the container to see if it's alive
- // If it's not, it's already stopped, return
- err := unix.Kill(ctr.state.PID, 0)
- if err == unix.ESRCH {
- return nil
- }
-
- stopSignal := ctr.config.StopSignal
- if stopSignal == 0 {
- stopSignal = uint(syscall.SIGTERM)
- }
-
- if timeout > 0 {
- if err := r.KillContainer(ctr, stopSignal, all); err != nil {
- // Is the container gone?
- // If so, it probably died between the first check and
- // our sending the signal
- // The container is stopped, so exit cleanly
- err := unix.Kill(ctr.state.PID, 0)
- if err == unix.ESRCH {
- return nil
+ // don't spread our mounts around. We are setting only /sys to be slave
+ // so that the cleanup process is still able to umount the storage and the
+ // changes are propagated to the host.
+ err = unix.Mount("/sys", "/sys", "none", unix.MS_REC|unix.MS_SLAVE, "")
+ if err != nil {
+ return 0, fmt.Errorf("cannot make /sys slave: %w", err)
}
- return err
- }
-
- if err := waitContainerStop(ctr, time.Duration(timeout)*time.Second); err != nil {
- logrus.Debugf("Timed out stopping container %s with %s, resorting to SIGKILL: %v", ctr.ID(), unix.SignalName(syscall.Signal(stopSignal)), err)
- logrus.Warnf("StopSignal %s failed to stop container %s in %d seconds, resorting to SIGKILL", unix.SignalName(syscall.Signal(stopSignal)), ctr.Name(), timeout)
- } else {
- // No error, the container is dead
- return nil
- }
- }
-
- if err := r.KillContainer(ctr, 9, all); err != nil {
- // Again, check if the container is gone. If it is, exit cleanly.
- err := unix.Kill(ctr.state.PID, 0)
- if err == unix.ESRCH {
- return nil
- }
-
- return fmt.Errorf("error sending SIGKILL to container %s: %w", ctr.ID(), err)
- }
-
- // Give runtime a few seconds to make it happen
- if err := waitContainerStop(ctr, killContainerTimeout); err != nil {
- return err
- }
-
- return nil
-}
-
-// DeleteContainer deletes a container from the OCI runtime.
-func (r *ConmonOCIRuntime) DeleteContainer(ctr *Container) error {
- runtimeDir, err := util.GetRuntimeDir()
- if err != nil {
- return err
- }
- env := []string{fmt.Sprintf("XDG_RUNTIME_DIR=%s", runtimeDir)}
- return utils.ExecCmdWithStdStreams(os.Stdin, os.Stdout, os.Stderr, env, r.path, append(r.runtimeFlags, "delete", "--force", ctr.ID())...)
-}
-
-// PauseContainer pauses the given container.
-func (r *ConmonOCIRuntime) PauseContainer(ctr *Container) error {
- runtimeDir, err := util.GetRuntimeDir()
- if err != nil {
- return err
- }
- env := []string{fmt.Sprintf("XDG_RUNTIME_DIR=%s", runtimeDir)}
- return utils.ExecCmdWithStdStreams(os.Stdin, os.Stdout, os.Stderr, env, r.path, append(r.runtimeFlags, "pause", ctr.ID())...)
-}
-
-// UnpauseContainer unpauses the given container.
-func (r *ConmonOCIRuntime) UnpauseContainer(ctr *Container) error {
- runtimeDir, err := util.GetRuntimeDir()
- if err != nil {
- return err
- }
- env := []string{fmt.Sprintf("XDG_RUNTIME_DIR=%s", runtimeDir)}
- return utils.ExecCmdWithStdStreams(os.Stdin, os.Stdout, os.Stderr, env, r.path, append(r.runtimeFlags, "resume", ctr.ID())...)
-}
-
-// HTTPAttach performs an attach for the HTTP API.
-// The caller must handle closing the HTTP connection after this returns.
-// The cancel channel is not closed; it is up to the caller to do so after
-// this function returns.
-// If this is a container with a terminal, we will stream raw. If it is not, we
-// will stream with an 8-byte header to multiplex STDOUT and STDERR.
-// Returns any errors that occurred, and whether the connection was successfully
-// hijacked before that error occurred.
-func (r *ConmonOCIRuntime) HTTPAttach(ctr *Container, req *http.Request, w http.ResponseWriter, streams *HTTPAttachStreams, detachKeys *string, cancel <-chan bool, hijackDone chan<- bool, streamAttach, streamLogs bool) (deferredErr error) {
- isTerminal := false
- if ctr.config.Spec.Process != nil {
- isTerminal = ctr.config.Spec.Process.Terminal
- }
-
- if streams != nil {
- if !streams.Stdin && !streams.Stdout && !streams.Stderr {
- return fmt.Errorf("must specify at least one stream to attach to: %w", define.ErrInvalidArg)
- }
- }
-
- attachSock, err := r.AttachSocketPath(ctr)
- if err != nil {
- return err
- }
-
- var conn *net.UnixConn
- if streamAttach {
- newConn, err := openUnixSocket(attachSock)
- if err != nil {
- return fmt.Errorf("failed to connect to container's attach socket: %v: %w", attachSock, err)
- }
- conn = newConn
- defer func() {
- if err := conn.Close(); err != nil {
- logrus.Errorf("Unable to close container %s attach socket: %q", ctr.ID(), err)
+ mounts, err := pmount.GetMounts()
+ if err != nil {
+ return 0, err
}
- }()
-
- logrus.Debugf("Successfully connected to container %s attach socket %s", ctr.ID(), attachSock)
- }
-
- detachString := ctr.runtime.config.Engine.DetachKeys
- if detachKeys != nil {
- detachString = *detachKeys
- }
- detach, err := processDetachKeys(detachString)
- if err != nil {
- return err
- }
-
- attachStdout := true
- attachStderr := true
- attachStdin := true
- if streams != nil {
- attachStdout = streams.Stdout
- attachStderr = streams.Stderr
- attachStdin = streams.Stdin
- }
-
- logrus.Debugf("Going to hijack container %s attach connection", ctr.ID())
-
- // Alright, let's hijack.
- hijacker, ok := w.(http.Hijacker)
- if !ok {
- return fmt.Errorf("unable to hijack connection")
- }
-
- httpCon, httpBuf, err := hijacker.Hijack()
- if err != nil {
- return fmt.Errorf("error hijacking connection: %w", err)
- }
-
- hijackDone <- true
-
- writeHijackHeader(req, httpBuf)
-
- // Force a flush after the header is written.
- if err := httpBuf.Flush(); err != nil {
- return fmt.Errorf("error flushing HTTP hijack header: %w", err)
- }
-
- defer func() {
- hijackWriteErrorAndClose(deferredErr, ctr.ID(), isTerminal, httpCon, httpBuf)
- }()
-
- logrus.Debugf("Hijack for container %s attach session done, ready to stream", ctr.ID())
-
- // TODO: This is gross. Really, really gross.
- // I want to say we should read all the logs into an array before
- // calling this, in container_api.go, but that could take a lot of
- // memory...
- // On the whole, we need to figure out a better way of doing this,
- // though.
- logSize := 0
- if streamLogs {
- logrus.Debugf("Will stream logs for container %s attach session", ctr.ID())
-
- // Get all logs for the container
- logChan := make(chan *logs.LogLine)
- logOpts := new(logs.LogOptions)
- logOpts.Tail = -1
- logOpts.WaitGroup = new(sync.WaitGroup)
- errChan := make(chan error)
- go func() {
- var err error
- // In non-terminal mode we need to prepend with the
- // stream header.
- logrus.Debugf("Writing logs for container %s to HTTP attach", ctr.ID())
- for logLine := range logChan {
- if !isTerminal {
- device := logLine.Device
- var header []byte
- headerLen := uint32(len(logLine.Msg))
- logSize += len(logLine.Msg)
- switch strings.ToLower(device) {
- case "stdin":
- header = makeHTTPAttachHeader(0, headerLen)
- case "stdout":
- header = makeHTTPAttachHeader(1, headerLen)
- case "stderr":
- header = makeHTTPAttachHeader(2, headerLen)
- default:
- logrus.Errorf("Unknown device for log line: %s", device)
- header = makeHTTPAttachHeader(1, headerLen)
- }
- _, err = httpBuf.Write(header)
- if err != nil {
- break
- }
- }
- _, err = httpBuf.Write([]byte(logLine.Msg))
- if err != nil {
- break
- }
- if !logLine.Partial() {
- _, err = httpBuf.Write([]byte("\n"))
- if err != nil {
- break
- }
+ for _, m := range mounts {
+ if !strings.HasPrefix(m.Mountpoint, "/sys/kernel") {
+ continue
}
- err = httpBuf.Flush()
- if err != nil {
- break
+ err = unix.Unmount(m.Mountpoint, 0)
+ if err != nil && !os.IsNotExist(err) {
+ return 0, fmt.Errorf("cannot unmount %s: %w", m.Mountpoint, err)
}
}
- errChan <- err
- }()
- if err := ctr.ReadLog(context.Background(), logOpts, logChan, 0); err != nil {
- return err
- }
- go func() {
- logOpts.WaitGroup.Wait()
- close(logChan)
+ return r.createOCIContainer(ctr, restoreOptions)
}()
- logrus.Debugf("Done reading logs for container %s, %d bytes", ctr.ID(), logSize)
- if err := <-errChan; err != nil {
- return err
+ ch <- result{
+ restoreDuration: restoreDuration,
+ err: err,
}
- }
- if !streamAttach {
- logrus.Debugf("Done streaming logs for container %s attach, exiting as attach streaming not requested", ctr.ID())
- return nil
- }
-
- logrus.Debugf("Forwarding attach output for container %s", ctr.ID())
-
- stdoutChan := make(chan error)
- stdinChan := make(chan error)
-
- // Handle STDOUT/STDERR
- go func() {
- var err error
- if isTerminal {
- // Hack: return immediately if attachStdout not set to
- // emulate Docker.
- // Basically, when terminal is set, STDERR goes nowhere.
- // Everything does over STDOUT.
- // Therefore, if not attaching STDOUT - we'll never copy
- // anything from here.
- logrus.Debugf("Performing terminal HTTP attach for container %s", ctr.ID())
- if attachStdout {
- err = httpAttachTerminalCopy(conn, httpBuf, ctr.ID())
- }
- } else {
- logrus.Debugf("Performing non-terminal HTTP attach for container %s", ctr.ID())
- err = httpAttachNonTerminalCopy(conn, httpBuf, ctr.ID(), attachStdin, attachStdout, attachStderr)
- }
- stdoutChan <- err
- logrus.Debugf("STDOUT/ERR copy completed")
}()
- // Next, STDIN. Avoid entirely if attachStdin unset.
- if attachStdin {
- go func() {
- _, err := cutil.CopyDetachable(conn, httpBuf, detach)
- logrus.Debugf("STDIN copy completed")
- stdinChan <- err
- }()
- }
-
- for {
- select {
- case err := <-stdoutChan:
- if err != nil {
- return err
- }
-
- return nil
- case err := <-stdinChan:
- if err != nil {
- return err
- }
- // copy stdin is done, close it
- if connErr := conn.CloseWrite(); connErr != nil {
- logrus.Errorf("Unable to close conn: %v", connErr)
- }
- case <-cancel:
- return nil
- }
- }
-}
-
-// isRetryable returns whether the error was caused by a blocked syscall or the
-// specified operation on a non blocking file descriptor wasn't ready for completion.
-func isRetryable(err error) bool {
- var errno syscall.Errno
- if errors.As(err, &errno) {
- return errno == syscall.EINTR || errno == syscall.EAGAIN
- }
- return false
+ res := <-ch
+ return res.restoreDuration, res.err
}
-// openControlFile opens the terminal control file.
-func openControlFile(ctr *Container, parentDir string) (*os.File, error) {
- controlPath := filepath.Join(parentDir, "ctl")
- for i := 0; i < 600; i++ {
- controlFile, err := os.OpenFile(controlPath, unix.O_WRONLY|unix.O_NONBLOCK, 0)
- if err == nil {
- return controlFile, nil
- }
- if !isRetryable(err) {
- return nil, fmt.Errorf("could not open ctl file for terminal resize for container %s: %w", ctr.ID(), err)
- }
- time.Sleep(time.Second / 10)
- }
- return nil, fmt.Errorf("timeout waiting for %q", controlPath)
-}
-
-// AttachResize resizes the terminal used by the given container.
-func (r *ConmonOCIRuntime) AttachResize(ctr *Container, newSize resize.TerminalSize) error {
- controlFile, err := openControlFile(ctr, ctr.bundlePath())
- if err != nil {
- return err
- }
- defer controlFile.Close()
-
- logrus.Debugf("Received a resize event for container %s: %+v", ctr.ID(), newSize)
- if _, err = fmt.Fprintf(controlFile, "%d %d %d\n", 1, newSize.Height, newSize.Width); err != nil {
- return fmt.Errorf("failed to write to ctl file to resize terminal: %w", err)
- }
-
- return nil
-}
-
-// CheckpointContainer checkpoints the given container.
-func (r *ConmonOCIRuntime) CheckpointContainer(ctr *Container, options ContainerCheckpointOptions) (int64, error) {
- // imagePath is used by CRIU to store the actual checkpoint files
- imagePath := ctr.CheckpointPath()
- if options.PreCheckPoint {
- imagePath = ctr.PreCheckPointPath()
- }
- // workPath will be used to store dump.log and stats-dump
- workPath := ctr.bundlePath()
- logrus.Debugf("Writing checkpoint to %s", imagePath)
- logrus.Debugf("Writing checkpoint logs to %s", workPath)
- logrus.Debugf("Pre-dump the container %t", options.PreCheckPoint)
- args := []string{}
- args = append(args, r.runtimeFlags...)
- args = append(args, "checkpoint")
- args = append(args, "--image-path")
- args = append(args, imagePath)
- args = append(args, "--work-path")
- args = append(args, workPath)
- if options.KeepRunning {
- args = append(args, "--leave-running")
- }
- if options.TCPEstablished {
- args = append(args, "--tcp-established")
- }
- if options.FileLocks {
- args = append(args, "--file-locks")
- }
- if !options.PreCheckPoint && options.KeepRunning {
- args = append(args, "--leave-running")
- }
- if options.PreCheckPoint {
- args = append(args, "--pre-dump")
- }
- if !options.PreCheckPoint && options.WithPrevious {
- args = append(
- args,
- "--parent-path",
- filepath.Join("..", preCheckpointDir),
- )
- }
-
- args = append(args, ctr.ID())
- logrus.Debugf("the args to checkpoint: %s %s", r.path, strings.Join(args, " "))
-
- runtimeDir, err := util.GetRuntimeDir()
- if err != nil {
- return 0, err
- }
- env := []string{fmt.Sprintf("XDG_RUNTIME_DIR=%s", runtimeDir)}
- if path, ok := os.LookupEnv("PATH"); ok {
- env = append(env, fmt.Sprintf("PATH=%s", path))
- }
-
+// Run the closure with the container's socket label set
+func (r *ConmonOCIRuntime) withContainerSocketLabel(ctr *Container, closure func() error) error {
runtime.LockOSThread()
if err := label.SetSocketLabel(ctr.ProcessLabel()); err != nil {
- return 0, err
+ return err
}
-
- runtimeCheckpointStarted := time.Now()
- err = utils.ExecCmdWithStdStreams(os.Stdin, os.Stdout, os.Stderr, env, r.path, args...)
+ err := closure()
// Ignore error returned from SetSocketLabel("") call,
// can't recover.
if labelErr := label.SetSocketLabel(""); labelErr == nil {
@@ -834,576 +97,7 @@ func (r *ConmonOCIRuntime) CheckpointContainer(ctr *Container, options Container
} else {
logrus.Errorf("Unable to reset socket label: %q", labelErr)
}
-
- runtimeCheckpointDuration := func() int64 {
- if options.PrintStats {
- return time.Since(runtimeCheckpointStarted).Microseconds()
- }
- return 0
- }()
-
- return runtimeCheckpointDuration, err
-}
-
-func (r *ConmonOCIRuntime) CheckConmonRunning(ctr *Container) (bool, error) {
- if ctr.state.ConmonPID == 0 {
- // If the container is running or paused, assume Conmon is
- // running. We didn't record Conmon PID on some old versions, so
- // that is likely what's going on...
- // Unusual enough that we should print a warning message though.
- if ctr.ensureState(define.ContainerStateRunning, define.ContainerStatePaused) {
- logrus.Warnf("Conmon PID is not set, but container is running!")
- return true, nil
- }
- // Container's not running, so conmon PID being unset is
- // expected. Conmon is not running.
- return false, nil
- }
-
- // We have a conmon PID. Ping it with signal 0.
- if err := unix.Kill(ctr.state.ConmonPID, 0); err != nil {
- if err == unix.ESRCH {
- return false, nil
- }
- return false, fmt.Errorf("error pinging container %s conmon with signal 0: %w", ctr.ID(), err)
- }
- return true, nil
-}
-
-// SupportsCheckpoint checks if the OCI runtime supports checkpointing
-// containers.
-func (r *ConmonOCIRuntime) SupportsCheckpoint() bool {
- return crutils.CRRuntimeSupportsCheckpointRestore(r.path)
-}
-
-// SupportsJSONErrors checks if the OCI runtime supports JSON-formatted error
-// messages.
-func (r *ConmonOCIRuntime) SupportsJSONErrors() bool {
- return r.supportsJSON
-}
-
-// SupportsNoCgroups checks if the OCI runtime supports running containers
-// without cgroups (the --cgroup-manager=disabled flag).
-func (r *ConmonOCIRuntime) SupportsNoCgroups() bool {
- return r.supportsNoCgroups
-}
-
-// SupportsKVM checks if the OCI runtime supports running containers
-// without KVM separation
-func (r *ConmonOCIRuntime) SupportsKVM() bool {
- return r.supportsKVM
-}
-
-// AttachSocketPath is the path to a single container's attach socket.
-func (r *ConmonOCIRuntime) AttachSocketPath(ctr *Container) (string, error) {
- if ctr == nil {
- return "", fmt.Errorf("must provide a valid container to get attach socket path: %w", define.ErrInvalidArg)
- }
-
- return filepath.Join(ctr.bundlePath(), "attach"), nil
-}
-
-// ExitFilePath is the path to a container's exit file.
-func (r *ConmonOCIRuntime) ExitFilePath(ctr *Container) (string, error) {
- if ctr == nil {
- return "", fmt.Errorf("must provide a valid container to get exit file path: %w", define.ErrInvalidArg)
- }
- return filepath.Join(r.exitsDir, ctr.ID()), nil
-}
-
-// RuntimeInfo provides information on the runtime.
-func (r *ConmonOCIRuntime) RuntimeInfo() (*define.ConmonInfo, *define.OCIRuntimeInfo, error) {
- runtimePackage := packageVersion(r.path)
- conmonPackage := packageVersion(r.conmonPath)
- runtimeVersion, err := r.getOCIRuntimeVersion()
- if err != nil {
- return nil, nil, fmt.Errorf("error getting version of OCI runtime %s: %w", r.name, err)
- }
- conmonVersion, err := r.getConmonVersion()
- if err != nil {
- return nil, nil, fmt.Errorf("error getting conmon version: %w", err)
- }
-
- conmon := define.ConmonInfo{
- Package: conmonPackage,
- Path: r.conmonPath,
- Version: conmonVersion,
- }
- ocirt := define.OCIRuntimeInfo{
- Name: r.name,
- Path: r.path,
- Package: runtimePackage,
- Version: runtimeVersion,
- }
- return &conmon, &ocirt, nil
-}
-
-// makeAccessible changes the path permission and each parent directory to have --x--x--x
-func makeAccessible(path string, uid, gid int) error {
- for ; path != "/"; path = filepath.Dir(path) {
- st, err := os.Stat(path)
- if err != nil {
- if os.IsNotExist(err) {
- return nil
- }
- return err
- }
- if int(st.Sys().(*syscall.Stat_t).Uid) == uid && int(st.Sys().(*syscall.Stat_t).Gid) == gid {
- continue
- }
- if st.Mode()&0111 != 0111 {
- if err := os.Chmod(path, st.Mode()|0111); err != nil {
- return err
- }
- }
- }
- return nil
-}
-
-// Wait for a container which has been sent a signal to stop
-func waitContainerStop(ctr *Container, timeout time.Duration) error {
- return waitPidStop(ctr.state.PID, timeout)
-}
-
-// Wait for a given PID to stop
-func waitPidStop(pid int, timeout time.Duration) error {
- done := make(chan struct{})
- chControl := make(chan struct{})
- go func() {
- for {
- select {
- case <-chControl:
- return
- default:
- if err := unix.Kill(pid, 0); err != nil {
- if err == unix.ESRCH {
- close(done)
- return
- }
- logrus.Errorf("Pinging PID %d with signal 0: %v", pid, err)
- }
- time.Sleep(100 * time.Millisecond)
- }
- }
- }()
- select {
- case <-done:
- return nil
- case <-time.After(timeout):
- close(chControl)
- return fmt.Errorf("given PIDs did not die within timeout")
- }
-}
-
-func (r *ConmonOCIRuntime) getLogTag(ctr *Container) (string, error) {
- logTag := ctr.LogTag()
- if logTag == "" {
- return "", nil
- }
- data, err := ctr.inspectLocked(false)
- if err != nil {
- // FIXME: this error should probably be returned
- return "", nil //nolint: nilerr
- }
- tmpl, err := template.New("container").Parse(logTag)
- if err != nil {
- return "", fmt.Errorf("template parsing error %s: %w", logTag, err)
- }
- var b bytes.Buffer
- err = tmpl.Execute(&b, data)
- if err != nil {
- return "", err
- }
- return b.String(), nil
-}
-
-// createOCIContainer generates this container's main conmon instance and prepares it for starting
-func (r *ConmonOCIRuntime) createOCIContainer(ctr *Container, restoreOptions *ContainerCheckpointOptions) (int64, error) {
- var stderrBuf bytes.Buffer
-
- runtimeDir, err := util.GetRuntimeDir()
- if err != nil {
- return 0, err
- }
-
- parentSyncPipe, childSyncPipe, err := newPipe()
- if err != nil {
- return 0, fmt.Errorf("error creating socket pair: %w", err)
- }
- defer errorhandling.CloseQuiet(parentSyncPipe)
-
- childStartPipe, parentStartPipe, err := newPipe()
- if err != nil {
- return 0, fmt.Errorf("error creating socket pair for start pipe: %w", err)
- }
-
- defer errorhandling.CloseQuiet(parentStartPipe)
-
- var ociLog string
- if logrus.GetLevel() != logrus.DebugLevel && r.supportsJSON {
- ociLog = filepath.Join(ctr.state.RunDir, "oci-log")
- }
-
- logTag, err := r.getLogTag(ctr)
- if err != nil {
- return 0, err
- }
-
- if ctr.config.CgroupsMode == cgroupSplit {
- if err := utils.MoveUnderCgroupSubtree("runtime"); err != nil {
- return 0, err
- }
- }
-
- pidfile := ctr.config.PidFile
- if pidfile == "" {
- pidfile = filepath.Join(ctr.state.RunDir, "pidfile")
- }
-
- args := r.sharedConmonArgs(ctr, ctr.ID(), ctr.bundlePath(), pidfile, ctr.LogPath(), r.exitsDir, ociLog, ctr.LogDriver(), logTag)
-
- if ctr.config.SdNotifyMode == define.SdNotifyModeContainer && ctr.config.SdNotifySocket != "" {
- args = append(args, fmt.Sprintf("--sdnotify-socket=%s", ctr.config.SdNotifySocket))
- }
-
- if ctr.config.Spec.Process.Terminal {
- args = append(args, "-t")
- } else if ctr.config.Stdin {
- args = append(args, "-i")
- }
-
- if ctr.config.Timeout > 0 {
- args = append(args, fmt.Sprintf("--timeout=%d", ctr.config.Timeout))
- }
-
- if !r.enableKeyring {
- args = append(args, "--no-new-keyring")
- }
- if ctr.config.ConmonPidFile != "" {
- args = append(args, "--conmon-pidfile", ctr.config.ConmonPidFile)
- }
-
- if r.noPivot {
- args = append(args, "--no-pivot")
- }
-
- exitCommand, err := specgenutil.CreateExitCommandArgs(ctr.runtime.storageConfig, ctr.runtime.config, logrus.IsLevelEnabled(logrus.DebugLevel), ctr.AutoRemove(), false)
- if err != nil {
- return 0, err
- }
- exitCommand = append(exitCommand, ctr.config.ID)
-
- args = append(args, "--exit-command", exitCommand[0])
- for _, arg := range exitCommand[1:] {
- args = append(args, []string{"--exit-command-arg", arg}...)
- }
-
- // Pass down the LISTEN_* environment (see #10443).
- preserveFDs := ctr.config.PreserveFDs
- if val := os.Getenv("LISTEN_FDS"); val != "" {
- if ctr.config.PreserveFDs > 0 {
- logrus.Warnf("Ignoring LISTEN_FDS to preserve custom user-specified FDs")
- } else {
- fds, err := strconv.Atoi(val)
- if err != nil {
- return 0, fmt.Errorf("converting LISTEN_FDS=%s: %w", val, err)
- }
- preserveFDs = uint(fds)
- }
- }
-
- if preserveFDs > 0 {
- args = append(args, formatRuntimeOpts("--preserve-fds", fmt.Sprintf("%d", preserveFDs))...)
- }
-
- if restoreOptions != nil {
- args = append(args, "--restore", ctr.CheckpointPath())
- if restoreOptions.TCPEstablished {
- args = append(args, "--runtime-opt", "--tcp-established")
- }
- if restoreOptions.FileLocks {
- args = append(args, "--runtime-opt", "--file-locks")
- }
- if restoreOptions.Pod != "" {
- mountLabel := ctr.config.MountLabel
- processLabel := ctr.config.ProcessLabel
- if mountLabel != "" {
- args = append(
- args,
- "--runtime-opt",
- fmt.Sprintf(
- "--lsm-mount-context=%s",
- mountLabel,
- ),
- )
- }
- if processLabel != "" {
- args = append(
- args,
- "--runtime-opt",
- fmt.Sprintf(
- "--lsm-profile=selinux:%s",
- processLabel,
- ),
- )
- }
- }
- }
-
- logrus.WithFields(logrus.Fields{
- "args": args,
- }).Debugf("running conmon: %s", r.conmonPath)
-
- cmd := exec.Command(r.conmonPath, args...)
- cmd.SysProcAttr = &syscall.SysProcAttr{
- Setpgid: true,
- }
- // TODO this is probably a really bad idea for some uses
- // Make this configurable
- cmd.Stdin = os.Stdin
- cmd.Stdout = os.Stdout
- cmd.Stderr = os.Stderr
- if ctr.config.Spec.Process.Terminal {
- cmd.Stderr = &stderrBuf
- }
-
- // 0, 1 and 2 are stdin, stdout and stderr
- conmonEnv := r.configureConmonEnv(runtimeDir)
-
- var filesToClose []*os.File
- if preserveFDs > 0 {
- for fd := 3; fd < int(3+preserveFDs); fd++ {
- f := os.NewFile(uintptr(fd), fmt.Sprintf("fd-%d", fd))
- filesToClose = append(filesToClose, f)
- cmd.ExtraFiles = append(cmd.ExtraFiles, f)
- }
- }
-
- cmd.Env = r.conmonEnv
- // we don't want to step on users fds they asked to preserve
- // Since 0-2 are used for stdio, start the fds we pass in at preserveFDs+3
- cmd.Env = append(cmd.Env, fmt.Sprintf("_OCI_SYNCPIPE=%d", preserveFDs+3), fmt.Sprintf("_OCI_STARTPIPE=%d", preserveFDs+4))
- cmd.Env = append(cmd.Env, conmonEnv...)
- cmd.ExtraFiles = append(cmd.ExtraFiles, childSyncPipe, childStartPipe)
-
- if r.reservePorts && !rootless.IsRootless() && !ctr.config.NetMode.IsSlirp4netns() {
- ports, err := bindPorts(ctr.convertPortMappings())
- if err != nil {
- return 0, err
- }
- filesToClose = append(filesToClose, ports...)
-
- // Leak the port we bound in the conmon process. These fd's won't be used
- // by the container and conmon will keep the ports busy so that another
- // process cannot use them.
- cmd.ExtraFiles = append(cmd.ExtraFiles, ports...)
- }
-
- if ctr.config.NetMode.IsSlirp4netns() || rootless.IsRootless() {
- if ctr.config.PostConfigureNetNS {
- havePortMapping := len(ctr.config.PortMappings) > 0
- if havePortMapping {
- ctr.rootlessPortSyncR, ctr.rootlessPortSyncW, err = os.Pipe()
- if err != nil {
- return 0, fmt.Errorf("failed to create rootless port sync pipe: %w", err)
- }
- }
- ctr.rootlessSlirpSyncR, ctr.rootlessSlirpSyncW, err = os.Pipe()
- if err != nil {
- return 0, fmt.Errorf("failed to create rootless network sync pipe: %w", err)
- }
- } else {
- if ctr.rootlessSlirpSyncR != nil {
- defer errorhandling.CloseQuiet(ctr.rootlessSlirpSyncR)
- }
- if ctr.rootlessSlirpSyncW != nil {
- defer errorhandling.CloseQuiet(ctr.rootlessSlirpSyncW)
- }
- }
- // Leak one end in conmon, the other one will be leaked into slirp4netns
- cmd.ExtraFiles = append(cmd.ExtraFiles, ctr.rootlessSlirpSyncW)
-
- if ctr.rootlessPortSyncW != nil {
- defer errorhandling.CloseQuiet(ctr.rootlessPortSyncW)
- // Leak one end in conmon, the other one will be leaked into rootlessport
- cmd.ExtraFiles = append(cmd.ExtraFiles, ctr.rootlessPortSyncW)
- }
- }
- var runtimeRestoreStarted time.Time
- if restoreOptions != nil {
- runtimeRestoreStarted = time.Now()
- }
- err = startCommand(cmd, ctr)
-
- // regardless of whether we errored or not, we no longer need the children pipes
- childSyncPipe.Close()
- childStartPipe.Close()
- if err != nil {
- return 0, err
- }
- if err := r.moveConmonToCgroupAndSignal(ctr, cmd, parentStartPipe); err != nil {
- return 0, err
- }
- /* Wait for initial setup and fork, and reap child */
- err = cmd.Wait()
- if err != nil {
- return 0, err
- }
-
- pid, err := readConmonPipeData(r.name, parentSyncPipe, ociLog)
- if err != nil {
- if err2 := r.DeleteContainer(ctr); err2 != nil {
- logrus.Errorf("Removing container %s from runtime after creation failed", ctr.ID())
- }
- return 0, err
- }
- ctr.state.PID = pid
-
- conmonPID, err := readConmonPidFile(ctr.config.ConmonPidFile)
- if err != nil {
- logrus.Warnf("Error reading conmon pid file for container %s: %v", ctr.ID(), err)
- } else if conmonPID > 0 {
- // conmon not having a pid file is a valid state, so don't set it if we don't have it
- logrus.Infof("Got Conmon PID as %d", conmonPID)
- ctr.state.ConmonPID = conmonPID
- }
-
- runtimeRestoreDuration := func() int64 {
- if restoreOptions != nil && restoreOptions.PrintStats {
- return time.Since(runtimeRestoreStarted).Microseconds()
- }
- return 0
- }()
-
- // These fds were passed down to the runtime. Close them
- // and not interfere
- for _, f := range filesToClose {
- errorhandling.CloseQuiet(f)
- }
-
- return runtimeRestoreDuration, nil
-}
-
-// configureConmonEnv gets the environment values to add to conmon's exec struct
-// TODO this may want to be less hardcoded/more configurable in the future
-func (r *ConmonOCIRuntime) configureConmonEnv(runtimeDir string) []string {
- var env []string
- for _, e := range os.Environ() {
- if strings.HasPrefix(e, "LC_") {
- env = append(env, e)
- }
- }
- conf, ok := os.LookupEnv("CONTAINERS_CONF")
- if ok {
- env = append(env, fmt.Sprintf("CONTAINERS_CONF=%s", conf))
- }
- env = append(env, fmt.Sprintf("XDG_RUNTIME_DIR=%s", runtimeDir))
- env = append(env, fmt.Sprintf("_CONTAINERS_USERNS_CONFIGURED=%s", os.Getenv("_CONTAINERS_USERNS_CONFIGURED")))
- env = append(env, fmt.Sprintf("_CONTAINERS_ROOTLESS_UID=%s", os.Getenv("_CONTAINERS_ROOTLESS_UID")))
- home := homedir.Get()
- if home != "" {
- env = append(env, fmt.Sprintf("HOME=%s", home))
- }
-
- return env
-}
-
-// sharedConmonArgs takes common arguments for exec and create/restore and formats them for the conmon CLI
-func (r *ConmonOCIRuntime) sharedConmonArgs(ctr *Container, cuuid, bundlePath, pidPath, logPath, exitDir, ociLogPath, logDriver, logTag string) []string {
- // set the conmon API version to be able to use the correct sync struct keys
- args := []string{
- "--api-version", "1",
- "-c", ctr.ID(),
- "-u", cuuid,
- "-r", r.path,
- "-b", bundlePath,
- "-p", pidPath,
- "-n", ctr.Name(),
- "--exit-dir", exitDir,
- "--full-attach",
- }
- if len(r.runtimeFlags) > 0 {
- rFlags := []string{}
- for _, arg := range r.runtimeFlags {
- rFlags = append(rFlags, "--runtime-arg", arg)
- }
- args = append(args, rFlags...)
- }
-
- if ctr.CgroupManager() == config.SystemdCgroupsManager && !ctr.config.NoCgroups && ctr.config.CgroupsMode != cgroupSplit {
- args = append(args, "-s")
- }
-
- var logDriverArg string
- switch logDriver {
- case define.JournaldLogging:
- logDriverArg = define.JournaldLogging
- case define.NoLogging:
- logDriverArg = define.NoLogging
- case define.PassthroughLogging:
- logDriverArg = define.PassthroughLogging
- //lint:ignore ST1015 the default case has to be here
- default: //nolint:stylecheck,gocritic
- // No case here should happen except JSONLogging, but keep this here in case the options are extended
- logrus.Errorf("%s logging specified but not supported. Choosing k8s-file logging instead", ctr.LogDriver())
- fallthrough
- case "":
- // to get here, either a user would specify `--log-driver ""`, or this came from another place in libpod
- // since the former case is obscure, and the latter case isn't an error, let's silently fallthrough
- fallthrough
- case define.JSONLogging:
- fallthrough
- case define.KubernetesLogging:
- logDriverArg = fmt.Sprintf("%s:%s", define.KubernetesLogging, logPath)
- }
-
- args = append(args, "-l", logDriverArg)
- logLevel := logrus.GetLevel()
- args = append(args, "--log-level", logLevel.String())
-
- if logLevel == logrus.DebugLevel {
- logrus.Debugf("%s messages will be logged to syslog", r.conmonPath)
- args = append(args, "--syslog")
- }
-
- size := r.logSizeMax
- if ctr.config.LogSize > 0 {
- size = ctr.config.LogSize
- }
- if size > 0 {
- args = append(args, "--log-size-max", fmt.Sprintf("%v", size))
- }
-
- if ociLogPath != "" {
- args = append(args, "--runtime-arg", "--log-format=json", "--runtime-arg", "--log", fmt.Sprintf("--runtime-arg=%s", ociLogPath))
- }
- if logTag != "" {
- args = append(args, "--log-tag", logTag)
- }
- if ctr.config.NoCgroups {
- logrus.Debugf("Running with no Cgroups")
- args = append(args, "--runtime-arg", "--cgroup-manager", "--runtime-arg", "disabled")
- }
- return args
-}
-
-func startCommand(cmd *exec.Cmd, ctr *Container) error {
- // Make sure to unset the NOTIFY_SOCKET and reset it afterwards if needed.
- switch ctr.config.SdNotifyMode {
- case define.SdNotifyModeContainer, define.SdNotifyModeIgnore:
- if prev := os.Getenv("NOTIFY_SOCKET"); prev != "" {
- if err := os.Unsetenv("NOTIFY_SOCKET"); err != nil {
- logrus.Warnf("Error unsetting NOTIFY_SOCKET %v", err)
- }
- defer func() {
- if err := os.Setenv("NOTIFY_SOCKET", prev); err != nil {
- logrus.Errorf("Resetting NOTIFY_SOCKET=%s", prev)
- }
- }()
- }
- }
-
- return cmd.Start()
+ return err
}
// moveConmonToCgroupAndSignal gets a container's cgroupParent and moves the conmon process to that cgroup
@@ -1475,271 +169,6 @@ func (r *ConmonOCIRuntime) moveConmonToCgroupAndSignal(ctr *Container, cmd *exec
return nil
}
-// newPipe creates a unix socket pair for communication.
-// Returns two files - first is parent, second is child.
-func newPipe() (*os.File, *os.File, error) {
- fds, err := unix.Socketpair(unix.AF_LOCAL, unix.SOCK_SEQPACKET|unix.SOCK_CLOEXEC, 0)
- if err != nil {
- return nil, nil, err
- }
- return os.NewFile(uintptr(fds[1]), "parent"), os.NewFile(uintptr(fds[0]), "child"), nil
-}
-
-// readConmonPidFile attempts to read conmon's pid from its pid file
-func readConmonPidFile(pidFile string) (int, error) {
- // Let's try reading the Conmon pid at the same time.
- if pidFile != "" {
- contents, err := ioutil.ReadFile(pidFile)
- if err != nil {
- return -1, err
- }
- // Convert it to an int
- conmonPID, err := strconv.Atoi(string(contents))
- if err != nil {
- return -1, err
- }
- return conmonPID, nil
- }
- return 0, nil
-}
-
-// readConmonPipeData attempts to read a syncInfo struct from the pipe
-func readConmonPipeData(runtimeName string, pipe *os.File, ociLog string) (int, error) {
- // syncInfo is used to return data from monitor process to daemon
- type syncInfo struct {
- Data int `json:"data"`
- Message string `json:"message,omitempty"`
- }
-
- // Wait to get container pid from conmon
- type syncStruct struct {
- si *syncInfo
- err error
- }
- ch := make(chan syncStruct)
- go func() {
- var si *syncInfo
- rdr := bufio.NewReader(pipe)
- b, err := rdr.ReadBytes('\n')
- // ignore EOF here, error is returned even when data was read
- // if it is no valid json unmarshal will fail below
- if err != nil && !errors.Is(err, io.EOF) {
- ch <- syncStruct{err: err}
- }
- if err := json.Unmarshal(b, &si); err != nil {
- ch <- syncStruct{err: fmt.Errorf("conmon bytes %q: %w", string(b), err)}
- return
- }
- ch <- syncStruct{si: si}
- }()
-
- data := -1 //nolint: wastedassign
- select {
- case ss := <-ch:
- if ss.err != nil {
- if ociLog != "" {
- ociLogData, err := ioutil.ReadFile(ociLog)
- if err == nil {
- var ociErr ociError
- if err := json.Unmarshal(ociLogData, &ociErr); err == nil {
- return -1, getOCIRuntimeError(runtimeName, ociErr.Msg)
- }
- }
- }
- return -1, fmt.Errorf("container create failed (no logs from conmon): %w", ss.err)
- }
- logrus.Debugf("Received: %d", ss.si.Data)
- if ss.si.Data < 0 {
- if ociLog != "" {
- ociLogData, err := ioutil.ReadFile(ociLog)
- if err == nil {
- var ociErr ociError
- if err := json.Unmarshal(ociLogData, &ociErr); err == nil {
- return ss.si.Data, getOCIRuntimeError(runtimeName, ociErr.Msg)
- }
- }
- }
- // If we failed to parse the JSON errors, then print the output as it is
- if ss.si.Message != "" {
- return ss.si.Data, getOCIRuntimeError(runtimeName, ss.si.Message)
- }
- return ss.si.Data, fmt.Errorf("container create failed: %w", define.ErrInternal)
- }
- data = ss.si.Data
- case <-time.After(define.ContainerCreateTimeout):
- return -1, fmt.Errorf("container creation timeout: %w", define.ErrInternal)
- }
- return data, nil
-}
-
-// writeConmonPipeData writes nonce data to a pipe
-func writeConmonPipeData(pipe *os.File) error {
- someData := []byte{0}
- _, err := pipe.Write(someData)
- return err
-}
-
-// formatRuntimeOpts prepends opts passed to it with --runtime-opt for passing to conmon
-func formatRuntimeOpts(opts ...string) []string {
- args := make([]string, 0, len(opts)*2)
- for _, o := range opts {
- args = append(args, "--runtime-opt", o)
- }
- return args
-}
-
-// getConmonVersion returns a string representation of the conmon version.
-func (r *ConmonOCIRuntime) getConmonVersion() (string, error) {
- output, err := utils.ExecCmd(r.conmonPath, "--version")
- if err != nil {
- return "", err
- }
- return strings.TrimSuffix(strings.Replace(output, "\n", ", ", 1), "\n"), nil
-}
-
-// getOCIRuntimeVersion returns a string representation of the OCI runtime's
-// version.
-func (r *ConmonOCIRuntime) getOCIRuntimeVersion() (string, error) {
- output, err := utils.ExecCmd(r.path, "--version")
- if err != nil {
- return "", err
- }
- return strings.TrimSuffix(output, "\n"), nil
-}
-
-// Copy data from container to HTTP connection, for terminal attach.
-// Container is the container's attach socket connection, http is a buffer for
-// the HTTP connection. cid is the ID of the container the attach session is
-// running for (used solely for error messages).
-func httpAttachTerminalCopy(container *net.UnixConn, http *bufio.ReadWriter, cid string) error {
- buf := make([]byte, bufferSize)
- for {
- numR, err := container.Read(buf)
- logrus.Debugf("Read fd(%d) %d/%d bytes for container %s", int(buf[0]), numR, len(buf), cid)
-
- if numR > 0 {
- switch buf[0] {
- case AttachPipeStdout:
- // Do nothing
- default:
- logrus.Errorf("Received unexpected attach type %+d, discarding %d bytes", buf[0], numR)
- continue
- }
-
- numW, err2 := http.Write(buf[1:numR])
- if err2 != nil {
- if err != nil {
- logrus.Errorf("Reading container %s STDOUT: %v", cid, err)
- }
- return err2
- } else if numW+1 != numR {
- return io.ErrShortWrite
- }
- // We need to force the buffer to write immediately, so
- // there isn't a delay on the terminal side.
- if err2 := http.Flush(); err2 != nil {
- if err != nil {
- logrus.Errorf("Reading container %s STDOUT: %v", cid, err)
- }
- return err2
- }
- }
- if err != nil {
- if err == io.EOF {
- return nil
- }
- return err
- }
- }
-}
-
-// Copy data from a container to an HTTP connection, for non-terminal attach.
-// Appends a header to multiplex input.
-func httpAttachNonTerminalCopy(container *net.UnixConn, http *bufio.ReadWriter, cid string, stdin, stdout, stderr bool) error {
- buf := make([]byte, bufferSize)
- for {
- numR, err := container.Read(buf)
- if numR > 0 {
- var headerBuf []byte
-
- // Subtract 1 because we strip the first byte (used for
- // multiplexing by Conmon).
- headerLen := uint32(numR - 1)
- // Practically speaking, we could make this buf[0] - 1,
- // but we need to validate it anyway.
- switch buf[0] {
- case AttachPipeStdin:
- headerBuf = makeHTTPAttachHeader(0, headerLen)
- if !stdin {
- continue
- }
- case AttachPipeStdout:
- if !stdout {
- continue
- }
- headerBuf = makeHTTPAttachHeader(1, headerLen)
- case AttachPipeStderr:
- if !stderr {
- continue
- }
- headerBuf = makeHTTPAttachHeader(2, headerLen)
- default:
- logrus.Errorf("Received unexpected attach type %+d, discarding %d bytes", buf[0], numR)
- continue
- }
-
- numH, err2 := http.Write(headerBuf)
- if err2 != nil {
- if err != nil {
- logrus.Errorf("Reading container %s standard streams: %v", cid, err)
- }
-
- return err2
- }
- // Hardcoding header length is pretty gross, but
- // fast. Should be safe, as this is a fixed part
- // of the protocol.
- if numH != 8 {
- if err != nil {
- logrus.Errorf("Reading container %s standard streams: %v", cid, err)
- }
-
- return io.ErrShortWrite
- }
-
- numW, err2 := http.Write(buf[1:numR])
- if err2 != nil {
- if err != nil {
- logrus.Errorf("Reading container %s standard streams: %v", cid, err)
- }
-
- return err2
- } else if numW+1 != numR {
- if err != nil {
- logrus.Errorf("Reading container %s standard streams: %v", cid, err)
- }
-
- return io.ErrShortWrite
- }
- // We need to force the buffer to write immediately, so
- // there isn't a delay on the terminal side.
- if err2 := http.Flush(); err2 != nil {
- if err != nil {
- logrus.Errorf("Reading container %s STDOUT: %v", cid, err)
- }
- return err2
- }
- }
- if err != nil {
- if err == io.EOF {
- return nil
- }
-
- return err
- }
- }
-}
-
// GetLimits converts spec resource limits to cgroup consumable limits
func GetLimits(resource *spec.LinuxResources) (runcconfig.Resources, error) {
if resource == nil {
generated by cgit v1.2.3-54-g00ecf (git 2.39.0) at 2024-09-24 18:26:50 +0000