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authorAdrian Reber <areber@redhat.com>2021-07-12 11:43:45 +0000
committerAdrian Reber <adrian@lisas.de>2021-07-27 16:10:44 +0200
commiteb94467780eab06a452586c9751fc4f571d9e089 (patch)
tree7fd60bf5369ae2da6c4661ba2c20e80267abf0c5 /pkg/criu
parent3375cbb198c74e895624eada148edff514b64d35 (diff)
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Support checkpoint/restore with pods
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>
Diffstat (limited to 'pkg/criu')
-rw-r--r--pkg/criu/criu.go4
1 files changed, 4 insertions, 0 deletions
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 {