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path: root/libpod/runtime_ctr.go
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package libpod

import (
	"context"
	"errors"
	"fmt"
	"os"
	"path"
	"path/filepath"
	"strings"
	"time"

	"github.com/containers/buildah"
	"github.com/containers/common/libnetwork/types"
	"github.com/containers/common/pkg/cgroups"
	"github.com/containers/common/pkg/config"
	cutil "github.com/containers/common/pkg/util"
	"github.com/containers/podman/v4/libpod/define"
	"github.com/containers/podman/v4/libpod/events"
	"github.com/containers/podman/v4/libpod/shutdown"
	"github.com/containers/podman/v4/pkg/domain/entities/reports"
	"github.com/containers/podman/v4/pkg/rootless"
	"github.com/containers/podman/v4/pkg/specgen"
	"github.com/containers/podman/v4/pkg/util"
	"github.com/containers/storage"
	"github.com/containers/storage/pkg/stringid"
	"github.com/docker/go-units"
	spec "github.com/opencontainers/runtime-spec/specs-go"
	"github.com/opencontainers/runtime-tools/generate"
	"github.com/sirupsen/logrus"
)

// Contains the public Runtime API for containers

// A CtrCreateOption is a functional option which alters the Container created
// by NewContainer
type CtrCreateOption func(*Container) error

// ContainerFilter is a function to determine whether a container is included
// in command output. Containers to be outputted are tested using the function.
// A true return will include the container, a false return will exclude it.
type ContainerFilter func(*Container) bool

// NewContainer creates a new container from a given OCI config.
func (r *Runtime) NewContainer(ctx context.Context, rSpec *spec.Spec, spec *specgen.SpecGenerator, infra bool, options ...CtrCreateOption) (*Container, error) {
	if !r.valid {
		return nil, define.ErrRuntimeStopped
	}
	if infra {
		options = append(options, withIsInfra())
	}
	return r.newContainer(ctx, rSpec, options...)
}

func (r *Runtime) PrepareVolumeOnCreateContainer(ctx context.Context, ctr *Container) error {
	// Copy the content from the underlying image into the newly created
	// volume if configured to do so.
	if !r.config.Containers.PrepareVolumeOnCreate {
		return nil
	}

	defer func() {
		if err := ctr.cleanupStorage(); err != nil {
			logrus.Errorf("Cleaning up container storage %s: %v", ctr.ID(), err)
		}
	}()

	mountPoint, err := ctr.mountStorage()
	if err == nil {
		// Finish up mountStorage
		ctr.state.Mounted = true
		ctr.state.Mountpoint = mountPoint
		if err = ctr.save(); err != nil {
			logrus.Errorf("Saving container %s state: %v", ctr.ID(), err)
		}
	}

	return err
}

// RestoreContainer re-creates a container from an imported checkpoint
func (r *Runtime) RestoreContainer(ctx context.Context, rSpec *spec.Spec, config *ContainerConfig) (*Container, error) {
	if !r.valid {
		return nil, define.ErrRuntimeStopped
	}

	ctr, err := r.initContainerVariables(rSpec, config)
	if err != nil {
		return nil, fmt.Errorf("error initializing container variables: %w", err)
	}
	// For an imported checkpoint no one has ever set the StartedTime. Set it now.
	ctr.state.StartedTime = time.Now()

	// If the path to ConmonPidFile starts with the default value (RunRoot), then
	// the user has not specified '--conmon-pidfile' during run or create (probably).
	// In that case reset ConmonPidFile to be set to the default value later.
	if strings.HasPrefix(ctr.config.ConmonPidFile, r.storageConfig.RunRoot) {
		ctr.config.ConmonPidFile = ""
	}

	// If the path to PidFile starts with the default value (RunRoot), then
	// the user has not specified '--pidfile' during run or create (probably).
	// In that case reset PidFile to be set to the default value later.
	if strings.HasPrefix(ctr.config.PidFile, r.storageConfig.RunRoot) {
		ctr.config.PidFile = ""
	}

	return r.setupContainer(ctx, ctr)
}

// RenameContainer renames the given container.
// Returns a copy of the container that has been renamed if successful.
func (r *Runtime) RenameContainer(ctx context.Context, ctr *Container, newName string) (*Container, error) {
	ctr.lock.Lock()
	defer ctr.lock.Unlock()

	if err := ctr.syncContainer(); err != nil {
		return nil, err
	}

	if newName == "" || !define.NameRegex.MatchString(newName) {
		return nil, define.RegexError
	}

	// We need to pull an updated config, in case another rename fired and
	// the config was re-written.
	newConf, err := r.state.GetContainerConfig(ctr.ID())
	if err != nil {
		return nil, fmt.Errorf("error retrieving container %s configuration from DB to remove: %w", ctr.ID(), err)
	}
	ctr.config = newConf

	logrus.Infof("Going to rename container %s from %q to %q", ctr.ID(), ctr.Name(), newName)

	// Step 1: Alter the config. Save the old name, we need it to rewrite
	// the config.
	oldName := ctr.config.Name
	ctr.config.Name = newName

	// Step 2: rewrite the old container's config in the DB.
	if err := r.state.SafeRewriteContainerConfig(ctr, oldName, ctr.config.Name, ctr.config); err != nil {
		// Assume the rename failed.
		// Set config back to the old name so reflect what is actually
		// present in the DB.
		ctr.config.Name = oldName
		return nil, fmt.Errorf("error renaming container %s: %w", ctr.ID(), err)
	}

	// Step 3: rename the container in c/storage.
	// This can fail if the name is already in use by a non-Podman
	// container. This puts us in a bad spot - we've already renamed the
	// container in Podman. We can swap the order, but then we have the
	// opposite problem. Atomicity is a real problem here, with no easy
	// solution.
	if err := r.store.SetNames(ctr.ID(), []string{ctr.Name()}); err != nil {
		return nil, err
	}

	ctr.newContainerEvent(events.Rename)
	return ctr, nil
}

func (r *Runtime) initContainerVariables(rSpec *spec.Spec, config *ContainerConfig) (*Container, error) {
	if rSpec == nil {
		return nil, fmt.Errorf("must provide a valid runtime spec to create container: %w", define.ErrInvalidArg)
	}
	ctr := new(Container)
	ctr.config = new(ContainerConfig)
	ctr.state = new(ContainerState)

	if config == nil {
		ctr.config.ID = stringid.GenerateNonCryptoID()
		size, err := units.FromHumanSize(r.config.Containers.ShmSize)
		if err != nil {
			return nil, fmt.Errorf("converting containers.conf ShmSize %s to an int: %w", r.config.Containers.ShmSize, err)
		}
		ctr.config.ShmSize = size
		ctr.config.NoShm = false
		ctr.config.NoShmShare = false
		ctr.config.StopSignal = 15

		ctr.config.StopTimeout = r.config.Engine.StopTimeout
	} else {
		// This is a restore from an imported checkpoint
		ctr.restoreFromCheckpoint = true
		if err := JSONDeepCopy(config, ctr.config); err != nil {
			return nil, fmt.Errorf("error copying container config for restore: %w", err)
		}
		// If the ID is empty a new name for the restored container was requested
		if ctr.config.ID == "" {
			ctr.config.ID = stringid.GenerateNonCryptoID()
		}
		// Reset the log path to point to the default
		ctr.config.LogPath = ""
		// Later in validate() the check is for nil. JSONDeepCopy sets it to an empty
		// object. Resetting it to nil if it was nil before.
		if config.StaticMAC == nil {
			ctr.config.StaticMAC = nil
		}
	}

	ctr.config.Spec = rSpec
	ctr.config.CreatedTime = time.Now()

	ctr.state.BindMounts = make(map[string]string)

	ctr.config.OCIRuntime = r.defaultOCIRuntime.Name()

	// Set namespace based on current runtime namespace
	// Do so before options run so they can override it
	if r.config.Engine.Namespace != "" {
		ctr.config.Namespace = r.config.Engine.Namespace
	}

	ctr.runtime = r

	return ctr, nil
}

func (r *Runtime) newContainer(ctx context.Context, rSpec *spec.Spec, options ...CtrCreateOption) (*Container, error) {
	var ctr *Container
	var err error

	ctr, err = r.initContainerVariables(rSpec, nil)

	if err != nil {
		return nil, fmt.Errorf("error initializing container variables: %w", err)
	}

	for _, option := range options {
		if err := option(ctr); err != nil {
			return nil, fmt.Errorf("error running container create option: %w", err)
		}
	}

	return r.setupContainer(ctx, ctr)
}

func (r *Runtime) setupContainer(ctx context.Context, ctr *Container) (_ *Container, retErr error) {
	// normalize the networks to names
	// the db backend only knows about network names so we have to make
	// sure we do not use ids internally
	if len(ctr.config.Networks) > 0 {
		normalizeNetworks := make(map[string]types.PerNetworkOptions, len(ctr.config.Networks))
		// first get the already used interface names so we do not conflict
		usedIfNames := make([]string, 0, len(ctr.config.Networks))
		for _, opts := range ctr.config.Networks {
			if opts.InterfaceName != "" {
				// check that no name is assigned to more than network
				if cutil.StringInSlice(opts.InterfaceName, usedIfNames) {
					return nil, fmt.Errorf("network interface name %q is already assigned to another network", opts.InterfaceName)
				}
				usedIfNames = append(usedIfNames, opts.InterfaceName)
			}
		}
		i := 0
		for nameOrID, opts := range ctr.config.Networks {
			netName, err := r.normalizeNetworkName(nameOrID)
			if err != nil {
				return nil, err
			}
			// assign interface name if empty
			if opts.InterfaceName == "" {
				for i < 100000 {
					ifName := fmt.Sprintf("eth%d", i)
					if !cutil.StringInSlice(ifName, usedIfNames) {
						opts.InterfaceName = ifName
						usedIfNames = append(usedIfNames, ifName)
						break
					}
					i++
				}
				// if still empty we did not find a free name
				if opts.InterfaceName == "" {
					return nil, errors.New("failed to find free network interface name")
				}
			}

			normalizeNetworks[netName] = opts
		}
		ctr.config.Networks = normalizeNetworks
	}

	// Validate the container
	if err := ctr.validate(); err != nil {
		return nil, err
	}
	if ctr.config.IsInfra {
		ctr.config.StopTimeout = 10
	}

	// Inhibit shutdown until creation succeeds
	shutdown.Inhibit()
	defer shutdown.Uninhibit()

	// Allocate a lock for the container
	lock, err := r.lockManager.AllocateLock()
	if err != nil {
		return nil, fmt.Errorf("error allocating lock for new container: %w", err)
	}
	ctr.lock = lock
	ctr.config.LockID = ctr.lock.ID()
	logrus.Debugf("Allocated lock %d for container %s", ctr.lock.ID(), ctr.ID())

	defer func() {
		if retErr != nil {
			if err := ctr.lock.Free(); err != nil {
				logrus.Errorf("Freeing lock for container after creation failed: %v", err)
			}
		}
	}()

	ctr.valid = true
	ctr.state.State = define.ContainerStateConfigured
	ctr.runtime = r

	if ctr.config.OCIRuntime == "" {
		ctr.ociRuntime = r.defaultOCIRuntime
	} else {
		ociRuntime, ok := r.ociRuntimes[ctr.config.OCIRuntime]
		if !ok {
			return nil, fmt.Errorf("requested OCI runtime %s is not available: %w", ctr.config.OCIRuntime, define.ErrInvalidArg)
		}
		ctr.ociRuntime = ociRuntime
	}

	// Check NoCgroups support
	if ctr.config.NoCgroups {
		if !ctr.ociRuntime.SupportsNoCgroups() {
			return nil, fmt.Errorf("requested OCI runtime %s is not compatible with NoCgroups: %w", ctr.ociRuntime.Name(), define.ErrInvalidArg)
		}
	}

	var pod *Pod
	if ctr.config.Pod != "" {
		// Get the pod from state
		pod, err = r.state.Pod(ctr.config.Pod)
		if err != nil {
			return nil, fmt.Errorf("cannot add container %s to pod %s: %w", ctr.ID(), ctr.config.Pod, err)
		}
	}

	// Check Cgroup parent sanity, and set it if it was not set.
	// Only if we're actually configuring Cgroups.
	if !ctr.config.NoCgroups {
		ctr.config.CgroupManager = r.config.Engine.CgroupManager
		switch r.config.Engine.CgroupManager {
		case config.CgroupfsCgroupsManager:
			if ctr.config.CgroupParent == "" {
				if pod != nil && pod.config.UsePodCgroup && !ctr.IsInfra() {
					podCgroup, err := pod.CgroupPath()
					if err != nil {
						return nil, fmt.Errorf("error retrieving pod %s cgroup: %w", pod.ID(), err)
					}
					expectPodCgroup, err := ctr.expectPodCgroup()
					if err != nil {
						return nil, err
					}
					if expectPodCgroup && podCgroup == "" {
						return nil, fmt.Errorf("pod %s cgroup is not set: %w", pod.ID(), define.ErrInternal)
					}
					canUseCgroup := !rootless.IsRootless() || isRootlessCgroupSet(podCgroup)
					if canUseCgroup {
						ctr.config.CgroupParent = podCgroup
					}
				} else if !rootless.IsRootless() {
					ctr.config.CgroupParent = CgroupfsDefaultCgroupParent
				}
			} else if strings.HasSuffix(path.Base(ctr.config.CgroupParent), ".slice") {
				return nil, fmt.Errorf("systemd slice received as cgroup parent when using cgroupfs: %w", define.ErrInvalidArg)
			}
		case config.SystemdCgroupsManager:
			if ctr.config.CgroupParent == "" {
				switch {
				case pod != nil && pod.config.UsePodCgroup && !ctr.IsInfra():
					podCgroup, err := pod.CgroupPath()
					if err != nil {
						return nil, fmt.Errorf("error retrieving pod %s cgroup: %w", pod.ID(), err)
					}
					ctr.config.CgroupParent = podCgroup
				case rootless.IsRootless() && ctr.config.CgroupsMode != cgroupSplit:
					ctr.config.CgroupParent = SystemdDefaultRootlessCgroupParent
				case ctr.config.CgroupsMode != cgroupSplit:
					ctr.config.CgroupParent = SystemdDefaultCgroupParent
				}
			} else if len(ctr.config.CgroupParent) < 6 || !strings.HasSuffix(path.Base(ctr.config.CgroupParent), ".slice") {
				return nil, fmt.Errorf("did not receive systemd slice as cgroup parent when using systemd to manage cgroups: %w", define.ErrInvalidArg)
			}
		default:
			return nil, fmt.Errorf("unsupported Cgroup manager: %s - cannot validate cgroup parent: %w", r.config.Engine.CgroupManager, define.ErrInvalidArg)
		}
	}

	if ctr.config.Timezone == "" {
		ctr.config.Timezone = r.config.Containers.TZ
	}

	if ctr.restoreFromCheckpoint {
		// Remove information about bind mount
		// for new container from imported checkpoint

		// NewFromSpec() is deprecated according to its comment
		// however the recommended replace just causes a nil map panic
		//nolint:staticcheck
		g := generate.NewFromSpec(ctr.config.Spec)
		g.RemoveMount("/dev/shm")
		ctr.config.ShmDir = ""
		g.RemoveMount("/etc/resolv.conf")
		g.RemoveMount("/etc/hostname")
		g.RemoveMount("/etc/hosts")
		g.RemoveMount("/run/.containerenv")
		g.RemoveMount("/run/secrets")

		// Regenerate Cgroup paths so they don't point to the old
		// container ID.
		cgroupPath, err := ctr.getOCICgroupPath()
		if err != nil {
			return nil, err
		}
		g.SetLinuxCgroupsPath(cgroupPath)
	}

	// Set up storage for the container
	if err := ctr.setupStorage(ctx); err != nil {
		return nil, err
	}
	defer func() {
		if retErr != nil {
			if err := ctr.teardownStorage(); err != nil {
				logrus.Errorf("Removing partially-created container root filesystem: %s", err)
			}
		}
	}()

	ctr.config.SecretsPath = filepath.Join(ctr.config.StaticDir, "secrets")
	err = os.MkdirAll(ctr.config.SecretsPath, 0755)
	if err != nil {
		return nil, err
	}
	for _, secr := range ctr.config.Secrets {
		err = ctr.extractSecretToCtrStorage(secr)
		if err != nil {
			return nil, err
		}
	}

	if ctr.config.ConmonPidFile == "" {
		ctr.config.ConmonPidFile = filepath.Join(ctr.state.RunDir, "conmon.pid")
	}

	if ctr.config.PidFile == "" {
		ctr.config.PidFile = filepath.Join(ctr.state.RunDir, "pidfile")
	}

	// Go through named volumes and add them.
	// If they don't exist they will be created using basic options.
	// Maintain an array of them - we need to lock them later.
	ctrNamedVolumes := make([]*Volume, 0, len(ctr.config.NamedVolumes))
	for _, vol := range ctr.config.NamedVolumes {
		isAnonymous := false
		if vol.Name == "" {
			// Anonymous volume. We'll need to create it.
			// It needs a name first.
			vol.Name = stringid.GenerateNonCryptoID()
			isAnonymous = true
		} else {
			// Check if it exists already
			dbVol, err := r.state.Volume(vol.Name)
			if err == nil {
				ctrNamedVolumes = append(ctrNamedVolumes, dbVol)
				// The volume exists, we're good
				continue
			} else if !errors.Is(err, define.ErrNoSuchVolume) {
				return nil, fmt.Errorf("error retrieving named volume %s for new container: %w", vol.Name, err)
			}
		}

		logrus.Debugf("Creating new volume %s for container", vol.Name)

		// The volume does not exist, so we need to create it.
		volOptions := []VolumeCreateOption{WithVolumeName(vol.Name), WithVolumeUID(ctr.RootUID()), WithVolumeGID(ctr.RootGID())}
		if isAnonymous {
			volOptions = append(volOptions, withSetAnon())
		}

		// If volume-opts are set parse and add driver opts.
		if len(vol.Options) > 0 {
			isDriverOpts := false
			driverOpts := make(map[string]string)
			for _, opts := range vol.Options {
				if strings.HasPrefix(opts, "volume-opt") {
					isDriverOpts = true
					driverOptKey, driverOptValue, err := util.ParseDriverOpts(opts)
					if err != nil {
						return nil, err
					}
					driverOpts[driverOptKey] = driverOptValue
				}
			}
			if isDriverOpts {
				parsedOptions := []VolumeCreateOption{WithVolumeOptions(driverOpts)}
				volOptions = append(volOptions, parsedOptions...)
			}
		}
		newVol, err := r.newVolume(false, volOptions...)
		if err != nil {
			return nil, fmt.Errorf("error creating named volume %q: %w", vol.Name, err)
		}

		ctrNamedVolumes = append(ctrNamedVolumes, newVol)
	}

	switch ctr.config.LogDriver {
	case define.NoLogging, define.PassthroughLogging:
		break
	case define.JournaldLogging:
		if err := ctr.initializeJournal(ctx); err != nil {
			return nil, fmt.Errorf("failed to initialize journal: %w", err)
		}
	default:
		if ctr.config.LogPath == "" {
			ctr.config.LogPath = filepath.Join(ctr.config.StaticDir, "ctr.log")
		}
	}

	if !MountExists(ctr.config.Spec.Mounts, "/dev/shm") && ctr.config.ShmDir == "" && !ctr.config.NoShm {
		ctr.config.ShmDir = filepath.Join(ctr.bundlePath(), "shm")
		if err := os.MkdirAll(ctr.config.ShmDir, 0700); err != nil {
			if !os.IsExist(err) {
				return nil, fmt.Errorf("unable to create shm dir: %w", err)
			}
		}
		ctr.config.Mounts = append(ctr.config.Mounts, ctr.config.ShmDir)
	}

	// Lock all named volumes we are adding ourself to, to ensure we can't
	// use a volume being removed.
	volsLocked := make(map[string]bool)
	for _, namedVol := range ctrNamedVolumes {
		toLock := namedVol
		// Ensure that we don't double-lock a named volume that is used
		// more than once.
		if volsLocked[namedVol.Name()] {
			continue
		}
		volsLocked[namedVol.Name()] = true
		toLock.lock.Lock()
		defer toLock.lock.Unlock()
	}
	// Add the container to the state
	// TODO: May be worth looking into recovering from name/ID collisions here
	if ctr.config.Pod != "" {
		// Lock the pod to ensure we can't add containers to pods
		// being removed
		pod.lock.Lock()
		defer pod.lock.Unlock()

		if err := r.state.AddContainerToPod(pod, ctr); err != nil {
			return nil, err
		}
	} else if err := r.state.AddContainer(ctr); err != nil {
		return nil, err
	}
	ctr.newContainerEvent(events.Create)
	return ctr, nil
}

// RemoveContainer removes the given container
// If force is specified, the container will be stopped first
// If removeVolume is specified, named volumes used by the container will
// be removed also if and only if the container is the sole user
// Otherwise, RemoveContainer will return an error if the container is running
func (r *Runtime) RemoveContainer(ctx context.Context, c *Container, force bool, removeVolume bool, timeout *uint) error {
	return r.removeContainer(ctx, c, force, removeVolume, false, timeout)
}

// Internal function to remove a container.
// Locks the container, but does not lock the runtime.
// removePod is used only when removing pods. It instructs Podman to ignore
// infra container protections, and *not* remove from the database (as pod
// remove will handle that).
func (r *Runtime) removeContainer(ctx context.Context, c *Container, force, removeVolume, removePod bool, timeout *uint) error {
	if !c.valid {
		if ok, _ := r.state.HasContainer(c.ID()); !ok {
			// Container probably already removed
			// Or was never in the runtime to begin with
			return nil
		}
	}

	// We need to refresh container config from the DB, to ensure that any
	// changes (e.g. a rename) are picked up before we start removing.
	// Since HasContainer above succeeded, we can safely assume the
	// container exists.
	// This is *very iffy* but it should be OK because the container won't
	// exist once we're done.
	newConf, err := r.state.GetContainerConfig(c.ID())
	if err != nil {
		return fmt.Errorf("error retrieving container %s configuration from DB to remove: %w", c.ID(), err)
	}
	c.config = newConf

	logrus.Debugf("Removing container %s", c.ID())

	// We need to lock the pod before we lock the container.
	// To avoid races around removing a container and the pod it is in.
	// Don't need to do this in pod removal case - we're evicting the entire
	// pod.
	var pod *Pod
	runtime := c.runtime
	if c.config.Pod != "" && !removePod {
		pod, err = r.state.Pod(c.config.Pod)
		if err != nil {
			return fmt.Errorf("container %s is in pod %s, but pod cannot be retrieved: %w", c.ID(), pod.ID(), err)
		}

		// Lock the pod while we're removing container
		if pod.config.LockID == c.config.LockID {
			return fmt.Errorf("container %s and pod %s share lock ID %d: %w", c.ID(), pod.ID(), c.config.LockID, define.ErrWillDeadlock)
		}
		pod.lock.Lock()
		defer pod.lock.Unlock()
		if err := pod.updatePod(); err != nil {
			return err
		}

		infraID := pod.state.InfraContainerID
		if c.ID() == infraID {
			return fmt.Errorf("container %s is the infra container of pod %s and cannot be removed without removing the pod", c.ID(), pod.ID())
		}
	}

	// For pod removal, the container is already locked by the caller
	if !removePod {
		c.lock.Lock()
		defer c.lock.Unlock()
	}

	if !r.valid {
		return define.ErrRuntimeStopped
	}

	// Update the container to get current state
	if err := c.syncContainer(); err != nil {
		return err
	}

	if c.IsService() {
		canStop, err := c.canStopServiceContainer()
		if err != nil {
			return err
		}
		if !canStop {
			return fmt.Errorf("container %s is the service container of pod(s) %s and cannot be removed without removing the pod(s)", c.ID(), strings.Join(c.state.Service.Pods, ","))
		}
	}

	// If we're not force-removing, we need to check if we're in a good
	// state to remove.
	if !force {
		if err := c.checkReadyForRemoval(); err != nil {
			return err
		}
	}

	if c.state.State == define.ContainerStatePaused {
		isV2, err := cgroups.IsCgroup2UnifiedMode()
		if err != nil {
			return err
		}
		// cgroups v1 and v2 handle signals on paused processes differently
		if !isV2 {
			if err := c.unpause(); err != nil {
				return err
			}
		}
		if err := c.ociRuntime.KillContainer(c, 9, false); err != nil {
			return err
		}
		// Need to update container state to make sure we know it's stopped
		if err := c.waitForExitFileAndSync(); err != nil {
			return err
		}
	}

	// Check that no other containers depend on the container.
	// Only used if not removing a pod - pods guarantee that all
	// deps will be evicted at the same time.
	if !removePod {
		deps, err := r.state.ContainerInUse(c)
		if err != nil {
			return err
		}
		if len(deps) != 0 {
			depsStr := strings.Join(deps, ", ")
			return fmt.Errorf("container %s has dependent containers which must be removed before it: %s: %w", c.ID(), depsStr, define.ErrCtrExists)
		}
	}

	// Check that the container's in a good state to be removed.
	if c.state.State == define.ContainerStateRunning {
		time := c.StopTimeout()
		if timeout != nil {
			time = *timeout
		}
		// Ignore ErrConmonDead - we couldn't retrieve the container's
		// exit code properly, but it's still stopped.
		if err := c.stop(time); err != nil && !errors.Is(err, define.ErrConmonDead) {
			return fmt.Errorf("cannot remove container %s as it could not be stopped: %w", c.ID(), err)
		}

		// We unlocked as part of stop() above - there's a chance someone
		// else got in and removed the container before we reacquired the
		// lock.
		// Do a quick ping of the database to check if the container
		// still exists.
		if ok, _ := r.state.HasContainer(c.ID()); !ok {
			// When the container has already been removed, the OCI runtime directory remain.
			if err := c.cleanupRuntime(ctx); err != nil {
				return fmt.Errorf("error cleaning up container %s from OCI runtime: %w", c.ID(), err)
			}
			return nil
		}
	}

	var cleanupErr error

	// Clean up network namespace, cgroups, mounts.
	// Do this before we set ContainerStateRemoving, to ensure that we can
	// actually remove from the OCI runtime.
	if err := c.cleanup(ctx); err != nil {
		cleanupErr = fmt.Errorf("error cleaning up container %s: %w", c.ID(), err)
	}

	// Set ContainerStateRemoving
	c.state.State = define.ContainerStateRemoving

	if err := c.save(); err != nil {
		if cleanupErr != nil {
			logrus.Errorf(err.Error())
		}
		return fmt.Errorf("unable to set container %s removing state in database: %w", c.ID(), err)
	}

	// Remove all active exec sessions
	// removing the exec sessions might temporarily unlock the container's lock.  Using it
	// after setting the state to ContainerStateRemoving will prevent that the container is
	// restarted
	if err := c.removeAllExecSessions(); err != nil {
		if cleanupErr == nil {
			cleanupErr = err
		} else {
			logrus.Errorf("Remove exec sessions: %v", err)
		}
	}

	// Stop the container's storage
	if err := c.teardownStorage(); err != nil {
		if cleanupErr == nil {
			cleanupErr = err
		} else {
			logrus.Errorf("Cleaning up storage: %v", err)
		}
	}

	// Remove the container from the state
	if c.config.Pod != "" {
		// If we're removing the pod, the container will be evicted
		// from the state elsewhere
		if !removePod {
			if err := r.state.RemoveContainerFromPod(pod, c); err != nil {
				if cleanupErr == nil {
					cleanupErr = err
				} else {
					logrus.Errorf("Removing container %s from database: %v", c.ID(), err)
				}
			}
		}
	} else {
		if err := r.state.RemoveContainer(c); err != nil {
			if cleanupErr == nil {
				cleanupErr = err
			} else {
				logrus.Errorf("Removing container %s from database: %v", c.ID(), err)
			}
		}
	}

	// Deallocate the container's lock
	if err := c.lock.Free(); err != nil {
		if cleanupErr == nil {
			cleanupErr = fmt.Errorf("error freeing lock for container %s: %w", c.ID(), err)
		} else {
			logrus.Errorf("Free container lock: %v", err)
		}
	}

	// Set container as invalid so it can no longer be used
	c.valid = false

	c.newContainerEvent(events.Remove)

	if !removeVolume {
		return cleanupErr
	}

	for _, v := range c.config.NamedVolumes {
		if volume, err := runtime.state.Volume(v.Name); err == nil {
			if !volume.Anonymous() {
				continue
			}
			if err := runtime.removeVolume(ctx, volume, false, timeout, false); err != nil && !errors.Is(err, define.ErrNoSuchVolume) {
				if errors.Is(err, define.ErrVolumeBeingUsed) {
					// Ignore error, since podman will report original error
					volumesFrom, _ := c.volumesFrom()
					if len(volumesFrom) > 0 {
						logrus.Debugf("Cleaning up volume not possible since volume is in use (%s)", v)
						continue
					}
				}
				logrus.Errorf("Cleaning up volume (%s): %v", v, err)
			}
		}
	}

	return cleanupErr
}

// EvictContainer removes the given container partial or full ID or name, and
// returns the full ID of the evicted container and any error encountered.
// It should be used to remove a container when obtaining a Container struct
// pointer has failed.
// Running container will not be stopped.
// If removeVolume is specified, named volumes used by the container will
// be removed also if and only if the container is the sole user.
func (r *Runtime) EvictContainer(ctx context.Context, idOrName string, removeVolume bool) (string, error) {
	return r.evictContainer(ctx, idOrName, removeVolume)
}

// evictContainer is the internal function to handle container eviction based
// on its partial or full ID or name.
// It returns the full ID of the evicted container and any error encountered.
// This does not lock the runtime nor the container.
// removePod is used only when removing pods. It instructs Podman to ignore
// infra container protections, and *not* remove from the database (as pod
// remove will handle that).
func (r *Runtime) evictContainer(ctx context.Context, idOrName string, removeVolume bool) (string, error) {
	var err error
	var timeout *uint

	if !r.valid {
		return "", define.ErrRuntimeStopped
	}

	id, err := r.state.LookupContainerID(idOrName)
	if err != nil {
		return "", err
	}

	// Begin by trying a normal removal. Valid containers will be removed normally.
	tmpCtr, err := r.state.Container(id)
	if err == nil {
		logrus.Infof("Container %s successfully retrieved from state, attempting normal removal", id)
		// Assume force = true for the evict case
		err = r.removeContainer(ctx, tmpCtr, true, removeVolume, false, timeout)
		if !tmpCtr.valid {
			// If the container is marked invalid, remove succeeded
			// in kicking it out of the state - no need to continue.
			return id, err
		}

		if err == nil {
			// Something has gone seriously wrong - no error but
			// container was not removed.
			logrus.Errorf("Container %s not removed with no error", id)
		} else {
			logrus.Warnf("Failed to removal container %s normally, proceeding with evict: %v", id, err)
		}
	}

	// Error out if the container does not exist in libpod
	exists, err := r.state.HasContainer(id)
	if err != nil {
		return id, err
	}
	if !exists {
		return id, err
	}

	// Re-create a container struct for removal purposes
	c := new(Container)
	c.config, err = r.state.GetContainerConfig(id)
	if err != nil {
		return id, fmt.Errorf("failed to retrieve config for ctr ID %q: %w", id, err)
	}
	c.state = new(ContainerState)

	// We need to lock the pod before we lock the container.
	// To avoid races around removing a container and the pod it is in.
	// Don't need to do this in pod removal case - we're evicting the entire
	// pod.
	var pod *Pod
	if c.config.Pod != "" {
		pod, err = r.state.Pod(c.config.Pod)
		if err != nil {
			return id, fmt.Errorf("container %s is in pod %s, but pod cannot be retrieved: %w", c.ID(), pod.ID(), err)
		}

		// Lock the pod while we're removing container
		pod.lock.Lock()
		defer pod.lock.Unlock()
		if err := pod.updatePod(); err != nil {
			return id, err
		}

		infraID, err := pod.infraContainerID()
		if err != nil {
			return "", err
		}
		if c.ID() == infraID {
			return id, fmt.Errorf("container %s is the infra container of pod %s and cannot be removed without removing the pod", c.ID(), pod.ID())
		}
	}

	if c.IsService() {
		canStop, err := c.canStopServiceContainer()
		if err != nil {
			return id, err
		}
		if !canStop {
			return id, fmt.Errorf("container %s is the service container of pod(s) %s and cannot be removed without removing the pod(s)", c.ID(), strings.Join(c.state.Service.Pods, ","))
		}
	}

	var cleanupErr error
	// Remove the container from the state
	if c.config.Pod != "" {
		// If we're removing the pod, the container will be evicted
		// from the state elsewhere
		if err := r.state.RemoveContainerFromPod(pod, c); err != nil {
			cleanupErr = err
		}
	} else {
		if err := r.state.RemoveContainer(c); err != nil {
			cleanupErr = err
		}
	}

	// Unmount container mount points
	for _, mount := range c.config.Mounts {
		Unmount(mount)
	}

	// Remove container from c/storage
	if err := r.RemoveStorageContainer(id, true); err != nil {
		if cleanupErr == nil {
			cleanupErr = err
		}
	}

	if !removeVolume {
		return id, cleanupErr
	}

	for _, v := range c.config.NamedVolumes {
		if volume, err := r.state.Volume(v.Name); err == nil {
			if !volume.Anonymous() {
				continue
			}
			if err := r.removeVolume(ctx, volume, false, timeout, false); err != nil && err != define.ErrNoSuchVolume && err != define.ErrVolumeBeingUsed {
				logrus.Errorf("Cleaning up volume (%s): %v", v, err)
			}
		}
	}

	return id, cleanupErr
}

// RemoveDepend removes all dependencies for a container.
// If the container is an infra container, the entire pod gets removed.
func (r *Runtime) RemoveDepend(ctx context.Context, rmCtr *Container, force bool, removeVolume bool, timeout *uint) ([]*reports.RmReport, error) {
	logrus.Debugf("Removing container %s and all dependent containers", rmCtr.ID())
	rmReports := make([]*reports.RmReport, 0)
	if rmCtr.IsInfra() {
		pod, err := r.GetPod(rmCtr.PodID())
		if err != nil {
			return nil, err
		}
		logrus.Debugf("Removing pod %s: depends on infra container %s", pod.ID(), rmCtr.ID())
		podContainerIDS, err := pod.AllContainersByID()
		if err != nil {
			return nil, err
		}
		if err := r.RemovePod(ctx, pod, true, force, timeout); err != nil {
			return nil, err
		}
		for _, cID := range podContainerIDS {
			rmReports = append(rmReports, &reports.RmReport{Id: cID})
		}
		return rmReports, nil
	}

	deps, err := r.state.ContainerInUse(rmCtr)
	if err != nil {
		if err == define.ErrCtrRemoved {
			return rmReports, nil
		}
		return rmReports, err
	}
	for _, cid := range deps {
		ctr, err := r.state.Container(cid)
		if err != nil {
			if err == define.ErrNoSuchCtr {
				continue
			}
			return rmReports, err
		}

		reports, err := r.RemoveDepend(ctx, ctr, force, removeVolume, timeout)
		if err != nil {
			return rmReports, err
		}
		rmReports = append(rmReports, reports...)
	}

	report := reports.RmReport{Id: rmCtr.ID()}
	report.Err = r.removeContainer(ctx, rmCtr, force, removeVolume, false, timeout)
	return append(rmReports, &report), nil
}

// GetContainer retrieves a container by its ID
func (r *Runtime) GetContainer(id string) (*Container, error) {
	if !r.valid {
		return nil, define.ErrRuntimeStopped
	}

	return r.state.Container(id)
}

// HasContainer checks if a container with the given ID is present
func (r *Runtime) HasContainer(id string) (bool, error) {
	if !r.valid {
		return false, define.ErrRuntimeStopped
	}

	return r.state.HasContainer(id)
}

// LookupContainer looks up a container by its name or a partial ID
// If a partial ID is not unique, an error will be returned
func (r *Runtime) LookupContainer(idOrName string) (*Container, error) {
	if !r.valid {
		return nil, define.ErrRuntimeStopped
	}
	return r.state.LookupContainer(idOrName)
}

// LookupContainerId looks up a container id by its name or a partial ID
// If a partial ID is not unique, an error will be returned
func (r *Runtime) LookupContainerID(idOrName string) (string, error) {
	if !r.valid {
		return "", define.ErrRuntimeStopped
	}
	return r.state.LookupContainerID(idOrName)
}

// GetContainers retrieves all containers from the state
// Filters can be provided which will determine what containers are included in
// the output. Multiple filters are handled by ANDing their output, so only
// containers matching all filters are returned
func (r *Runtime) GetContainers(filters ...ContainerFilter) ([]*Container, error) {
	if !r.valid {
		return nil, define.ErrRuntimeStopped
	}

	ctrs, err := r.GetAllContainers()
	if err != nil {
		return nil, err
	}

	ctrsFiltered := make([]*Container, 0, len(ctrs))

	for _, ctr := range ctrs {
		include := true
		for _, filter := range filters {
			include = include && filter(ctr)
		}

		if include {
			ctrsFiltered = append(ctrsFiltered, ctr)
		}
	}

	return ctrsFiltered, nil
}

// GetAllContainers is a helper function for GetContainers
func (r *Runtime) GetAllContainers() ([]*Container, error) {
	return r.state.AllContainers()
}

// GetRunningContainers is a helper function for GetContainers
func (r *Runtime) GetRunningContainers() ([]*Container, error) {
	running := func(c *Container) bool {
		state, _ := c.State()
		return state == define.ContainerStateRunning
	}
	return r.GetContainers(running)
}

// GetContainersByList is a helper function for GetContainers
// which takes a []string of container IDs or names
func (r *Runtime) GetContainersByList(containers []string) ([]*Container, error) {
	ctrs := make([]*Container, 0, len(containers))
	for _, inputContainer := range containers {
		ctr, err := r.LookupContainer(inputContainer)
		if err != nil {
			return ctrs, fmt.Errorf("unable to look up container %s: %w", inputContainer, err)
		}
		ctrs = append(ctrs, ctr)
	}
	return ctrs, nil
}

// GetLatestContainer returns a container object of the latest created container.
func (r *Runtime) GetLatestContainer() (*Container, error) {
	lastCreatedIndex := -1
	var lastCreatedTime time.Time
	ctrs, err := r.GetAllContainers()
	if err != nil {
		return nil, fmt.Errorf("unable to find latest container: %w", err)
	}
	if len(ctrs) == 0 {
		return nil, define.ErrNoSuchCtr
	}
	for containerIndex, ctr := range ctrs {
		createdTime := ctr.config.CreatedTime
		if createdTime.After(lastCreatedTime) {
			lastCreatedTime = createdTime
			lastCreatedIndex = containerIndex
		}
	}
	return ctrs[lastCreatedIndex], nil
}

// GetExecSessionContainer gets the container that a given exec session ID is
// attached to.
func (r *Runtime) GetExecSessionContainer(id string) (*Container, error) {
	if !r.valid {
		return nil, define.ErrRuntimeStopped
	}

	ctrID, err := r.state.GetExecSession(id)
	if err != nil {
		return nil, err
	}

	return r.state.Container(ctrID)
}

// PruneContainers removes stopped and exited containers from localstorage.  A set of optional filters
// can be provided to be more granular.
func (r *Runtime) PruneContainers(filterFuncs []ContainerFilter) ([]*reports.PruneReport, error) {
	preports := make([]*reports.PruneReport, 0)
	// We add getting the exited and stopped containers via a filter
	containerStateFilter := func(c *Container) bool {
		if c.PodID() != "" {
			return false
		}
		state, err := c.State()
		if err != nil {
			logrus.Error(err)
			return false
		}
		if state == define.ContainerStateStopped || state == define.ContainerStateExited ||
			state == define.ContainerStateCreated || state == define.ContainerStateConfigured {
			return true
		}
		return false
	}
	filterFuncs = append(filterFuncs, containerStateFilter)
	delContainers, err := r.GetContainers(filterFuncs...)
	if err != nil {
		return nil, err
	}
	for _, c := range delContainers {
		report := new(reports.PruneReport)
		report.Id = c.ID()
		report.Err = nil
		report.Size = 0
		size, err := c.RWSize()
		if err != nil {
			report.Err = err
			preports = append(preports, report)
			continue
		}
		var time *uint
		err = r.RemoveContainer(context.Background(), c, false, false, time)
		if err != nil {
			report.Err = err
		} else {
			report.Size = (uint64)(size)
		}
		preports = append(preports, report)
	}
	return preports, nil
}

// MountStorageContainer mounts the storage container's root filesystem
func (r *Runtime) MountStorageContainer(id string) (string, error) {
	if _, err := r.GetContainer(id); err == nil {
		return "", fmt.Errorf("ctr %s is a libpod container: %w", id, define.ErrCtrExists)
	}
	container, err := r.store.Container(id)
	if err != nil {
		return "", err
	}
	mountPoint, err := r.store.Mount(container.ID, "")
	if err != nil {
		return "", fmt.Errorf("error mounting storage for container %s: %w", id, err)
	}
	return mountPoint, nil
}

// UnmountStorageContainer unmounts the storage container's root filesystem
func (r *Runtime) UnmountStorageContainer(id string, force bool) (bool, error) {
	if _, err := r.GetContainer(id); err == nil {
		return false, fmt.Errorf("ctr %s is a libpod container: %w", id, define.ErrCtrExists)
	}
	container, err := r.store.Container(id)
	if err != nil {
		return false, err
	}
	return r.store.Unmount(container.ID, force)
}

// MountedStorageContainer returns whether a storage container is mounted
// along with the mount path
func (r *Runtime) IsStorageContainerMounted(id string) (bool, string, error) {
	var path string
	if _, err := r.GetContainer(id); err == nil {
		return false, "", fmt.Errorf("ctr %s is a libpod container: %w", id, define.ErrCtrExists)
	}

	mountCnt, err := r.storageService.MountedContainerImage(id)
	if err != nil {
		return false, "", err
	}
	mounted := mountCnt > 0
	if mounted {
		path, err = r.storageService.GetMountpoint(id)
		if err != nil {
			return false, "", err
		}
	}
	return mounted, path, nil
}

// StorageContainers returns a list of containers from containers/storage that
// are not currently known to Podman.
func (r *Runtime) StorageContainers() ([]storage.Container, error) {
	if r.store == nil {
		return nil, define.ErrStoreNotInitialized
	}

	storeContainers, err := r.store.Containers()
	if err != nil {
		return nil, fmt.Errorf("error reading list of all storage containers: %w", err)
	}
	retCtrs := []storage.Container{}
	for _, container := range storeContainers {
		exists, err := r.state.HasContainer(container.ID)
		if err != nil && err != define.ErrNoSuchCtr {
			return nil, fmt.Errorf("failed to check if %s container exists in database: %w", container.ID, err)
		}
		if exists {
			continue
		}
		retCtrs = append(retCtrs, container)
	}

	return retCtrs, nil
}

func (r *Runtime) IsBuildahContainer(id string) (bool, error) {
	return buildah.IsContainer(id, r.store)
}