implement podman update

podman update allows users to change the cgroup configuration of an existing container using the already defined resource limits flags
from podman create/run. The supported flags in crun are:

this command is also now supported in the libpod api via the /libpod/containers/<CID>/update endpoint where
the resource limits are passed inthe request body and follow the OCI resource spec format

–memory
–cpus
–cpuset-cpus
–cpuset-mems
–memory-swap
–memory-reservation
–cpu-shares
–cpu-quota
–cpu-period
–blkio-weight
–cpu-rt-period
–cpu-rt-runtime
-device-read-bps
-device-write-bps
-device-read-iops
-device-write-iops
-memory-swappiness
-blkio-weight-device

resolves #15067

Signed-off-by: Charlie Doern <cdoern@redhat.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/libpod/oci.go b/libpod/oci.go
index 70053db1b..e5b9a0dcd 100644
--- a/libpod/oci.go
+++ b/libpod/oci.go
@@ -5,6 +5,7 @@ import (
 
 	"github.com/containers/common/pkg/resize"
 	"github.com/containers/podman/v4/libpod/define"
+	"github.com/opencontainers/runtime-spec/specs-go"
 )
 
 // OCIRuntime is an implementation of an OCI runtime.
@@ -148,6 +149,9 @@ type OCIRuntime interface {
 
 	// RuntimeInfo returns verbose information about the runtime.
 	RuntimeInfo() (*define.ConmonInfo, *define.OCIRuntimeInfo, error)
+
+	// UpdateContainer updates the given container's cgroup configuration.
+	UpdateContainer(ctr *Container, res *specs.LinuxResources) error
 }
 
 // AttachOptions are options used when attached to a container or an exec