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Wire through CRI ContainerCheckpoint RPC

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This connects the new CRI ContainerCheckpoint RPC to the existing
internal checkpoint functions. With this commit it is possible
to checkpoint a container in Kubernetes using the Forensic Container
Checkpointing KEP (#2008):

 # curl X POST "https://localhost:10250/checkpoint/namespace/podId/container"

Which will result in containerd creating a checkpoint in the location
specified by Kubernetes (usually /var/lib/kubelet/checkpoints).

This is a Linux only feature because CRIU only exists on Linux.

Rewritten with the help of Phil Estes.

Signed-off-by: Phil Estes <estesp@gmail.com>
Signed-off-by: Adrian Reber <areber@redhat.com>
This commit is contained in:
Adrian Reber
2022-05-20 06:38:33 +00:00
parent e53663cca7
commit f25770e48d
20 changed files with 4085 additions and 1 deletions
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2
internal/cri/server/metrics.go
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@@ -35,6 +35,7 @@ var (
containerStopTimer metrics.LabeledTimer
containerStartTimer metrics.LabeledTimer
containerEventsDroppedCount metrics.Counter
containerCheckpointTimer metrics.LabeledTimer
networkPluginOperations metrics.LabeledCounter
networkPluginOperationsErrors metrics.LabeledCounter
@@ -59,6 +60,7 @@ func init() {
containerStopTimer = ns.NewLabeledTimer("container_stop", "time to stop a container", "runtime")
containerStartTimer = ns.NewLabeledTimer("container_start", "time to start a container", "runtime")
containerEventsDroppedCount = ns.NewCounter("container_events_dropped", "count container discarding event total from server start")
containerCheckpointTimer = ns.NewLabeledTimer("container_checkpoint", "time to checkpoint a container", "runtime")
networkPluginOperations = ns.NewLabeledCounter("network_plugin_operations_total", "cumulative number of network plugin operations by operation type", "operation_type")
networkPluginOperationsErrors = ns.NewLabeledCounter("network_plugin_operations_errors_total", "cumulative number of network plugin operations by operation type", "operation_type")