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| author | Adrian Reber <areber@redhat.com> | 2021-07-12 11:43:45 +0000 |
|---|---|---|
| committer | Adrian Reber <adrian@lisas.de> | 2021-07-27 16:10:44 +0200 |
| commit | eb94467780eab06a452586c9751fc4f571d9e089 (patch) | |
| tree | 7fd60bf5369ae2da6c4661ba2c20e80267abf0c5 /pkg/criu/criu.go | |
| parent | 3375cbb198c74e895624eada148edff514b64d35 (diff) | |
| download | podman-eb94467780eab06a452586c9751fc4f571d9e089.tar.gz podman-eb94467780eab06a452586c9751fc4f571d9e089.tar.bz2 podman-eb94467780eab06a452586c9751fc4f571d9e089.zip | |
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/criu.go')
| -rw-r--r-- | pkg/criu/criu.go | 4 |
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 { |