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eb94467780
This adds support to checkpoint containers out of pods and restore container into pods. It is only possible to restore a container into a pod if it has been checkpointed out of pod. It is also not possible to restore a non pod container into a pod. The main reason this does not work is the PID namespace. If a non pod container is being restored in a pod with a shared PID namespace, at least one process in the restored container uses PID 1 which is already in use by the infrastructure container. If someone tries to restore container from a pod with a shared PID namespace without a shared PID namespace it will also fail because the resulting PID namespace will not have a PID 1. Signed-off-by: Adrian Reber <areber@redhat.com>
24 lines
582 B
Go
24 lines
582 B
Go
package criu
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import (
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"github.com/checkpoint-restore/go-criu/v5"
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)
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// MinCriuVersion for Podman at least CRIU 3.11 is required
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const MinCriuVersion = 31100
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// PodCriuVersion is the version of CRIU needed for
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// checkpointing and restoring containers out of and into Pods.
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const PodCriuVersion = 31600
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// CheckForCriu uses CRIU's go bindings to check if the CRIU
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// binary exists and if it at least the version Podman needs.
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func CheckForCriu(version int) bool {
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c := criu.MakeCriu()
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result, err := c.IsCriuAtLeast(version)
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if err != nil {
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return false
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}
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return result
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}
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