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-rw-r--r--pkg/bindings/containers/types.go1
-rw-r--r--pkg/bindings/containers/types_restore_options.go16
-rw-r--r--pkg/checkpoint/checkpoint_restore.go96
-rw-r--r--pkg/checkpoint/crutils/checkpoint_restore_utils.go11
-rw-r--r--pkg/criu/criu.go4
-rw-r--r--pkg/domain/entities/containers.go1
-rw-r--r--pkg/domain/infra/abi/containers.go1
7 files changed, 130 insertions, 0 deletions
diff --git a/pkg/bindings/containers/types.go b/pkg/bindings/containers/types.go
index 1058c7a48..b74a938d1 100644
--- a/pkg/bindings/containers/types.go
+++ b/pkg/bindings/containers/types.go
@@ -62,6 +62,7 @@ type RestoreOptions struct {
Keep *bool
Name *string
TCPEstablished *bool
+ Pod *string
}
//go:generate go run ../generator/generator.go CreateOptions
diff --git a/pkg/bindings/containers/types_restore_options.go b/pkg/bindings/containers/types_restore_options.go
index ea6c810a2..820a7696f 100644
--- a/pkg/bindings/containers/types_restore_options.go
+++ b/pkg/bindings/containers/types_restore_options.go
@@ -131,3 +131,19 @@ func (o *RestoreOptions) GetTCPEstablished() bool {
}
return *o.TCPEstablished
}
+
+// WithPod
+func (o *RestoreOptions) WithPod(value string) *RestoreOptions {
+ v := &value
+ o.Pod = v
+ return o
+}
+
+// GetPod
+func (o *RestoreOptions) GetPod() string {
+ var pod string
+ if o.Pod == nil {
+ return pod
+ }
+ return *o.Pod
+}
diff --git a/pkg/checkpoint/checkpoint_restore.go b/pkg/checkpoint/checkpoint_restore.go
index 0d45cab5f..9fdf04933 100644
--- a/pkg/checkpoint/checkpoint_restore.go
+++ b/pkg/checkpoint/checkpoint_restore.go
@@ -9,6 +9,9 @@ import (
"github.com/containers/common/libimage"
"github.com/containers/common/pkg/config"
"github.com/containers/podman/v3/libpod"
+ ann "github.com/containers/podman/v3/pkg/annotations"
+ "github.com/containers/podman/v3/pkg/checkpoint/crutils"
+ "github.com/containers/podman/v3/pkg/criu"
"github.com/containers/podman/v3/pkg/domain/entities"
"github.com/containers/podman/v3/pkg/errorhandling"
"github.com/containers/podman/v3/pkg/specgen/generate"
@@ -68,6 +71,14 @@ func CRImportCheckpoint(ctx context.Context, runtime *libpod.Runtime, restoreOpt
return nil, err
}
+ if ctrConfig.Pod != "" && restoreOptions.Pod == "" {
+ return nil, errors.New("cannot restore pod container without --pod")
+ }
+
+ if ctrConfig.Pod == "" && restoreOptions.Pod != "" {
+ return nil, errors.New("cannot restore non pod container into pod")
+ }
+
// This should not happen as checkpoints with these options are not exported.
if len(ctrConfig.Dependencies) > 0 {
return nil, errors.Errorf("Cannot import checkpoints of containers with dependencies")
@@ -96,6 +107,91 @@ func CRImportCheckpoint(ctx context.Context, runtime *libpod.Runtime, restoreOpt
newName = true
}
+ if restoreOptions.Pod != "" {
+ // Restoring into a Pod requires much newer versions of CRIU
+ if !criu.CheckForCriu(criu.PodCriuVersion) {
+ return nil, errors.Errorf("restoring containers into pods requires at least CRIU %d", criu.PodCriuVersion)
+ }
+ // The runtime also has to support it
+ if !crutils.CRRuntimeSupportsPodCheckpointRestore(runtime.GetOCIRuntimePath()) {
+ return nil, errors.Errorf("runtime %s does not support pod restore", runtime.GetOCIRuntimePath())
+ }
+ // Restoring into an existing Pod
+ ctrConfig.Pod = restoreOptions.Pod
+
+ // According to podman pod create a pod can share the following namespaces:
+ // cgroup, ipc, net, pid, uts
+ // Let's make sure we a restoring into a pod with the same shared namespaces.
+ pod, err := runtime.LookupPod(ctrConfig.Pod)
+ if err != nil {
+ return nil, errors.Wrapf(err, "pod %q cannot be retrieved", ctrConfig.Pod)
+ }
+
+ infraContainer, err := pod.InfraContainer()
+ if err != nil {
+ return nil, errors.Wrapf(err, "cannot retrieve infra container from pod %q", ctrConfig.Pod)
+ }
+
+ // If a namespaces was shared (!= "") it needs to be set to the new infrastructure container
+ // If the infrastructure container does not share the same namespaces as the to be restored
+ // container we abort.
+ if ctrConfig.IPCNsCtr != "" {
+ if !pod.SharesIPC() {
+ return nil, errors.Errorf("pod %s does not share the IPC namespace", ctrConfig.Pod)
+ }
+ ctrConfig.IPCNsCtr = infraContainer.ID()
+ }
+
+ if ctrConfig.NetNsCtr != "" {
+ if !pod.SharesNet() {
+ return nil, errors.Errorf("pod %s does not share the network namespace", ctrConfig.Pod)
+ }
+ ctrConfig.NetNsCtr = infraContainer.ID()
+ }
+
+ if ctrConfig.PIDNsCtr != "" {
+ if !pod.SharesPID() {
+ return nil, errors.Errorf("pod %s does not share the PID namespace", ctrConfig.Pod)
+ }
+ ctrConfig.PIDNsCtr = infraContainer.ID()
+ }
+
+ if ctrConfig.UTSNsCtr != "" {
+ if !pod.SharesUTS() {
+ return nil, errors.Errorf("pod %s does not share the UTS namespace", ctrConfig.Pod)
+ }
+ ctrConfig.UTSNsCtr = infraContainer.ID()
+ }
+
+ if ctrConfig.CgroupNsCtr != "" {
+ if !pod.SharesCgroup() {
+ return nil, errors.Errorf("pod %s does not share the cgroup namespace", ctrConfig.Pod)
+ }
+ ctrConfig.CgroupNsCtr = infraContainer.ID()
+ }
+
+ // Change SELinux labels to infrastructure container labels
+ ctrConfig.MountLabel = infraContainer.MountLabel()
+ ctrConfig.ProcessLabel = infraContainer.ProcessLabel()
+
+ // Fix parent cgroup
+ cgroupPath, err := pod.CgroupPath()
+ if err != nil {
+ return nil, errors.Wrapf(err, "cannot retrieve cgroup path from pod %q", ctrConfig.Pod)
+ }
+ ctrConfig.CgroupParent = cgroupPath
+
+ oldPodID := dumpSpec.Annotations[ann.SandboxID]
+ // Fix up SandboxID in the annotations
+ dumpSpec.Annotations[ann.SandboxID] = ctrConfig.Pod
+ // Fix up CreateCommand
+ for i, c := range ctrConfig.CreateCommand {
+ if c == oldPodID {
+ ctrConfig.CreateCommand[i] = ctrConfig.Pod
+ }
+ }
+ }
+
if len(restoreOptions.PublishPorts) > 0 {
ports, _, _, err := generate.ParsePortMapping(restoreOptions.PublishPorts)
if err != nil {
diff --git a/pkg/checkpoint/crutils/checkpoint_restore_utils.go b/pkg/checkpoint/crutils/checkpoint_restore_utils.go
index 53ff55865..3b77368bb 100644
--- a/pkg/checkpoint/crutils/checkpoint_restore_utils.go
+++ b/pkg/checkpoint/crutils/checkpoint_restore_utils.go
@@ -1,6 +1,7 @@
package crutils
import (
+ "bytes"
"io"
"os"
"os/exec"
@@ -189,3 +190,13 @@ func CRRuntimeSupportsCheckpointRestore(runtimePath string) bool {
}
return false
}
+
+// CRRuntimeSupportsCheckpointRestore tests if the runtime at 'runtimePath'
+// supports restoring into existing Pods. The runtime needs to support
+// the CRIU option --lsm-mount-context and the existence of this is checked
+// by this function. In addition it is necessary to at least have CRIU 3.16.
+func CRRuntimeSupportsPodCheckpointRestore(runtimePath string) bool {
+ cmd := exec.Command(runtimePath, "restore", "--lsm-mount-context")
+ out, _ := cmd.CombinedOutput()
+ return bytes.Contains(out, []byte("flag needs an argument"))
+}
diff --git a/pkg/criu/criu.go b/pkg/criu/criu.go
index 0b5d2c45e..2a6805979 100644
--- a/pkg/criu/criu.go
+++ b/pkg/criu/criu.go
@@ -7,6 +7,10 @@ import (
// MinCriuVersion for Podman at least CRIU 3.11 is required
const MinCriuVersion = 31100
+// PodCriuVersion is the version of CRIU needed for
+// checkpointing and restoring containers out of and into Pods.
+const PodCriuVersion = 31600
+
// CheckForCriu uses CRIU's go bindings to check if the CRIU
// binary exists and if it at least the version Podman needs.
func CheckForCriu(version int) bool {
diff --git a/pkg/domain/entities/containers.go b/pkg/domain/entities/containers.go
index 4d85941cd..6d84a4ecb 100644
--- a/pkg/domain/entities/containers.go
+++ b/pkg/domain/entities/containers.go
@@ -207,6 +207,7 @@ type RestoreOptions struct {
TCPEstablished bool
ImportPrevious string
PublishPorts []specgen.PortMapping
+ Pod string
}
type RestoreReport struct {
diff --git a/pkg/domain/infra/abi/containers.go b/pkg/domain/infra/abi/containers.go
index 2c89fc66b..2003879b8 100644
--- a/pkg/domain/infra/abi/containers.go
+++ b/pkg/domain/infra/abi/containers.go
@@ -529,6 +529,7 @@ func (ic *ContainerEngine) ContainerRestore(ctx context.Context, namesOrIds []st
IgnoreStaticIP: options.IgnoreStaticIP,
IgnoreStaticMAC: options.IgnoreStaticMAC,
ImportPrevious: options.ImportPrevious,
+ Pod: options.Pod,
}
filterFuncs := []libpod.ContainerFilter{