podman pod create --memory

using the new resource backend, implement podman pod create --memory which enables
users to modify memory.max inside of the parent cgroup (the pod), implicitly impacting all
children unless overriden

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

1 files changed, 17 insertions, 0 deletions

diff --git a/libpod/pod.go b/libpod/pod.go
index 2502c41a9..c8c6790e8 100644
--- a/libpod/pod.go
+++ b/libpod/pod.go
@@ -169,6 +169,23 @@ func (p *Pod) CPUQuota() int64 {
 	return 0
 }
 
+// MemoryLimit returns the pod Memory Limit
+func (p *Pod) MemoryLimit() uint64 {
+	if p.state.InfraContainerID == "" {
+		return 0
+	}
+	infra, err := p.runtime.GetContainer(p.state.InfraContainerID)
+	if err != nil {
+		return 0
+	}
+	conf := infra.config.Spec
+	if conf != nil && conf.Linux != nil && conf.Linux.Resources != nil && conf.Linux.Resources.Memory != nil && conf.Linux.Resources.Memory.Limit != nil {
+		val := *conf.Linux.Resources.Memory.Limit
+		return uint64(val)
+	}
+	return 0
+}
+
 // NetworkMode returns the Network mode given by the user ex: pod, private...
 func (p *Pod) NetworkMode() string {
 	infra, err := p.runtime.GetContainer(p.state.InfraContainerID)