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-rw-r--r--libpod/container_graph.go91
-rw-r--r--libpod/pod_api.go2
-rw-r--r--libpod/runtime_ctr.go52
-rw-r--r--libpod/runtime_img.go2
-rw-r--r--libpod/runtime_pod_linux.go92
-rw-r--r--libpod/runtime_volume_linux.go2
6 files changed, 189 insertions, 52 deletions
diff --git a/libpod/container_graph.go b/libpod/container_graph.go
index 96d61b756..d43579e4a 100644
--- a/libpod/container_graph.go
+++ b/libpod/container_graph.go
@@ -281,3 +281,94 @@ func startNode(ctx context.Context, node *containerNode, setError bool, ctrError
startNode(ctx, successor, ctrErrored, ctrErrors, ctrsVisited, restart)
}
}
+
+// Visit a node on the container graph and remove it, or set an error if it
+// failed to remove. Only intended for use in pod removal; do *not* use when
+// removing individual containers.
+// All containers are assumed to be *UNLOCKED* on running this function.
+// Container locks will be acquired as necessary.
+// Pod and infraID are optional. If a pod is given it must be *LOCKED*.
+func removeNode(ctx context.Context, node *containerNode, pod *Pod, force bool, timeout *uint, setError bool, ctrErrors map[string]error, ctrsVisited map[string]bool, ctrNamedVolumes map[string]*ContainerNamedVolume) {
+ // If we already visited this node, we're done.
+ if ctrsVisited[node.id] {
+ return
+ }
+
+ // Someone who depends on us failed.
+ // Mark us as failed and recurse.
+ if setError {
+ ctrsVisited[node.id] = true
+ ctrErrors[node.id] = fmt.Errorf("a container that depends on container %s could not be removed: %w", node.id, define.ErrCtrStateInvalid)
+
+ // Hit anyone who depends on us, set errors there as well.
+ for _, successor := range node.dependsOn {
+ removeNode(ctx, successor, pod, force, timeout, true, ctrErrors, ctrsVisited, ctrNamedVolumes)
+ }
+ }
+
+ // Does anyone still depend on us?
+ // Cannot remove if true. Once all our dependencies have been removed,
+ // we will be removed.
+ for _, dep := range node.dependedOn {
+ // The container that depends on us hasn't been removed yet.
+ // OK to continue on
+ if ok := ctrsVisited[dep.id]; !ok {
+ return
+ }
+ }
+
+ // Going to try to remove the node, mark us as visited
+ ctrsVisited[node.id] = true
+
+ ctrErrored := false
+
+ // Verify that all that depend on us are gone.
+ // Graph traversal should guarantee this is true, but this isn't that
+ // expensive, and it's better to be safe.
+ for _, dep := range node.dependedOn {
+ if _, err := node.container.runtime.GetContainer(dep.id); err == nil {
+ ctrErrored = true
+ ctrErrors[node.id] = fmt.Errorf("a container that depends on container %s still exists: %w", node.id, define.ErrDepExists)
+ }
+ }
+
+ // Lock the container
+ node.container.lock.Lock()
+
+ // Gate all subsequent bits behind a ctrErrored check - we don't want to
+ // proceed if a previous step failed.
+ if !ctrErrored {
+ if err := node.container.syncContainer(); err != nil {
+ ctrErrored = true
+ ctrErrors[node.id] = err
+ }
+ }
+
+ if !ctrErrored {
+ for _, vol := range node.container.config.NamedVolumes {
+ ctrNamedVolumes[vol.Name] = vol
+ }
+
+ if pod != nil && pod.state.InfraContainerID == node.id {
+ pod.state.InfraContainerID = ""
+ if err := pod.save(); err != nil {
+ ctrErrored = true
+ ctrErrors[node.id] = fmt.Errorf("error removing infra container %s from pod %s: %w", node.id, pod.ID(), err)
+ }
+ }
+ }
+
+ if !ctrErrored {
+ if err := node.container.runtime.removeContainer(ctx, node.container, force, false, true, false, timeout); err != nil {
+ ctrErrored = true
+ ctrErrors[node.id] = err
+ }
+ }
+
+ node.container.lock.Unlock()
+
+ // Recurse to anyone who we depend on and remove them
+ for _, successor := range node.dependsOn {
+ removeNode(ctx, successor, pod, force, timeout, ctrErrored, ctrErrors, ctrsVisited, ctrNamedVolumes)
+ }
+}
diff --git a/libpod/pod_api.go b/libpod/pod_api.go
index 1bd686ddc..924d43436 100644
--- a/libpod/pod_api.go
+++ b/libpod/pod_api.go
@@ -40,7 +40,7 @@ func (p *Pod) startInitContainers(ctx context.Context) error {
icLock := initCon.lock
icLock.Lock()
var time *uint
- if err := p.runtime.removeContainer(ctx, initCon, false, false, true, time); err != nil {
+ if err := p.runtime.removeContainer(ctx, initCon, false, false, true, false, time); err != nil {
icLock.Unlock()
return fmt.Errorf("failed to remove once init container %s: %w", initCon.ID(), err)
}
diff --git a/libpod/runtime_ctr.go b/libpod/runtime_ctr.go
index 1f032dd6b..7b3cbadfa 100644
--- a/libpod/runtime_ctr.go
+++ b/libpod/runtime_ctr.go
@@ -581,7 +581,7 @@ func (r *Runtime) setupContainer(ctx context.Context, ctr *Container) (_ *Contai
// 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)
+ return r.removeContainer(ctx, c, force, removeVolume, false, false, timeout)
}
// Internal function to remove a container.
@@ -589,7 +589,9 @@ func (r *Runtime) RemoveContainer(ctx context.Context, c *Container, force bool,
// 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 {
+// ignoreDeps is *DANGEROUS* and should not be used outside of a very specific
+// context (alternate pod removal code, where graph traversal is not possible).
+func (r *Runtime) removeContainer(ctx context.Context, c *Container, force, removeVolume, removePod, ignoreDeps bool, timeout *uint) error {
if !c.valid {
if ok, _ := r.state.HasContainer(c.ID()); !ok {
// Container probably already removed
@@ -618,25 +620,27 @@ func (r *Runtime) removeContainer(ctx context.Context, c *Container, force, remo
// pod.
var pod *Pod
runtime := c.runtime
- if c.config.Pod != "" && !removePod {
+ if c.config.Pod != "" {
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
- }
+ if !removePod {
+ // 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())
+ 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())
+ }
}
}
@@ -696,7 +700,7 @@ func (r *Runtime) removeContainer(ctx context.Context, c *Container, force, remo
// 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 {
+ if !ignoreDeps {
deps, err := r.state.ContainerInUse(c)
if err != nil {
return err
@@ -777,13 +781,11 @@ func (r *Runtime) removeContainer(ctx context.Context, c *Container, force, remo
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)
- }
+ 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 {
@@ -872,7 +874,7 @@ func (r *Runtime) evictContainer(ctx context.Context, idOrName string, removeVol
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)
+ err = r.removeContainer(ctx, tmpCtr, true, removeVolume, false, false, timeout)
if !tmpCtr.valid {
// If the container is marked invalid, remove succeeded
// in kicking it out of the state - no need to continue.
@@ -1034,7 +1036,7 @@ func (r *Runtime) RemoveDepend(ctx context.Context, rmCtr *Container, force bool
}
report := reports.RmReport{Id: rmCtr.ID(), RawInput: rmCtr.ID()}
- report.Err = r.removeContainer(ctx, rmCtr, force, removeVolume, false, timeout)
+ report.Err = r.removeContainer(ctx, rmCtr, force, removeVolume, false, false, timeout)
return append(rmReports, &report), nil
}
diff --git a/libpod/runtime_img.go b/libpod/runtime_img.go
index 5510b2af6..dacbd752f 100644
--- a/libpod/runtime_img.go
+++ b/libpod/runtime_img.go
@@ -47,7 +47,7 @@ func (r *Runtime) RemoveContainersForImageCallback(ctx context.Context) libimage
return fmt.Errorf("removing image %s: container %s using image could not be removed: %w", imageID, ctr.ID(), err)
}
} else {
- if err := r.removeContainer(ctx, ctr, true, false, false, timeout); err != nil {
+ if err := r.removeContainer(ctx, ctr, true, false, false, false, timeout); err != nil {
return fmt.Errorf("removing image %s: container %s using image could not be removed: %w", imageID, ctr.ID(), err)
}
}
diff --git a/libpod/runtime_pod_linux.go b/libpod/runtime_pod_linux.go
index 3eeef69d8..24e9f3da7 100644
--- a/libpod/runtime_pod_linux.go
+++ b/libpod/runtime_pod_linux.go
@@ -17,6 +17,7 @@ import (
"github.com/containers/podman/v4/libpod/events"
"github.com/containers/podman/v4/pkg/rootless"
"github.com/containers/podman/v4/pkg/specgen"
+ "github.com/hashicorp/go-multierror"
"github.com/sirupsen/logrus"
)
@@ -191,29 +192,9 @@ func (r *Runtime) SavePod(pod *Pod) error {
return nil
}
-func (r *Runtime) removePod(ctx context.Context, p *Pod, removeCtrs, force bool, timeout *uint) error {
- if err := p.updatePod(); err != nil {
- return err
- }
-
- ctrs, err := r.state.PodContainers(p)
- if err != nil {
- return err
- }
- numCtrs := len(ctrs)
-
- // If the only running container in the pod is the pause container, remove the pod and container unconditionally.
- pauseCtrID := p.state.InfraContainerID
- if numCtrs == 1 && ctrs[0].ID() == pauseCtrID {
- removeCtrs = true
- force = true
- }
- if !removeCtrs && numCtrs > 0 {
- return fmt.Errorf("pod %s contains containers and cannot be removed: %w", p.ID(), define.ErrCtrExists)
- }
-
- ctrNamedVolumes := make(map[string]*ContainerNamedVolume)
-
+// DO NOT USE THIS FUNCTION DIRECTLY. Use removePod(), below. It will call
+// removeMalformedPod() if necessary.
+func (r *Runtime) removeMalformedPod(ctx context.Context, p *Pod, ctrs []*Container, force bool, timeout *uint, ctrNamedVolumes map[string]*ContainerNamedVolume) error {
var removalErr error
for _, ctr := range ctrs {
err := func() error {
@@ -231,7 +212,7 @@ func (r *Runtime) removePod(ctx context.Context, p *Pod, removeCtrs, force bool,
ctrNamedVolumes[vol.Name] = vol
}
- return r.removeContainer(ctx, ctr, force, false, true, timeout)
+ return r.removeContainer(ctx, ctr, force, false, true, true, timeout)
}()
if removalErr == nil {
@@ -261,6 +242,69 @@ func (r *Runtime) removePod(ctx context.Context, p *Pod, removeCtrs, force bool,
return err
}
+ return nil
+}
+
+func (r *Runtime) removePod(ctx context.Context, p *Pod, removeCtrs, force bool, timeout *uint) error {
+ if err := p.updatePod(); err != nil {
+ return err
+ }
+
+ ctrs, err := r.state.PodContainers(p)
+ if err != nil {
+ return err
+ }
+ numCtrs := len(ctrs)
+
+ // If the only running container in the pod is the pause container, remove the pod and container unconditionally.
+ pauseCtrID := p.state.InfraContainerID
+ if numCtrs == 1 && ctrs[0].ID() == pauseCtrID {
+ removeCtrs = true
+ force = true
+ }
+ if !removeCtrs && numCtrs > 0 {
+ return fmt.Errorf("pod %s contains containers and cannot be removed: %w", p.ID(), define.ErrCtrExists)
+ }
+
+ var removalErr error
+ ctrNamedVolumes := make(map[string]*ContainerNamedVolume)
+
+ // Build a graph of all containers in the pod.
+ graph, err := BuildContainerGraph(ctrs)
+ if err != nil {
+ // We have to allow the pod to be removed.
+ // But let's only do it if force is set.
+ if !force {
+ return fmt.Errorf("cannot create container graph for pod %s: %w", p.ID(), err)
+ }
+
+ removalErr = fmt.Errorf("creating container graph for pod %s failed, fell back to loop removal: %w", p.ID(), err)
+
+ if err := r.removeMalformedPod(ctx, p, ctrs, force, timeout, ctrNamedVolumes); err != nil {
+ logrus.Errorf("Error creating container graph for pod %s: %v. Falling back to loop removal.", p.ID(), err)
+ return err
+ }
+ } else {
+ ctrErrors := make(map[string]error)
+ ctrsVisited := make(map[string]bool)
+
+ for _, node := range graph.notDependedOnNodes {
+ removeNode(ctx, node, p, force, timeout, false, ctrErrors, ctrsVisited, ctrNamedVolumes)
+ }
+
+ // This is gross, but I don't want to change the signature on
+ // removePod - especially since any change here eventually has
+ // to map down to one error unless we want to make a breaking
+ // API change.
+ if len(ctrErrors) > 0 {
+ var allErrs error
+ for id, err := range ctrErrors {
+ allErrs = multierror.Append(allErrs, fmt.Errorf("removing container %s from pod %s: %w", id, p.ID(), err))
+ }
+ return allErrs
+ }
+ }
+
for volName := range ctrNamedVolumes {
volume, err := r.state.Volume(volName)
if err != nil && !errors.Is(err, define.ErrNoSuchVolume) {
diff --git a/libpod/runtime_volume_linux.go b/libpod/runtime_volume_linux.go
index c9a4a7dc1..08fdbf977 100644
--- a/libpod/runtime_volume_linux.go
+++ b/libpod/runtime_volume_linux.go
@@ -324,7 +324,7 @@ func (r *Runtime) removeVolume(ctx context.Context, v *Volume, force bool, timeo
logrus.Debugf("Removing container %s (depends on volume %q)", ctr.ID(), v.Name())
- if err := r.removeContainer(ctx, ctr, force, false, false, timeout); err != nil {
+ if err := r.removeContainer(ctx, ctr, force, false, false, false, timeout); err != nil {
return fmt.Errorf("removing container %s that depends on volume %s: %w", ctr.ID(), v.Name(), err)
}
}
generated by cgit v1.2.3-54-g00ecf (git 2.39.0) at 2024-11-13 22:07:24 +0000