Add ability for ubuntu to be tested

unfortunately the papr CI system cannot test ubuntu as a VM; therefore,
this PR still keeps travis.  but it does include fixes that will be required
for running on modern versions of ubuntu.

Signed-off-by: baude <bbaude@redhat.com>

1 files changed, 25 insertions, 0 deletions

diff --git a/libpod/util.go b/libpod/util.go
index 17325f6e4..3b51e4fcc 100644
--- a/libpod/util.go
+++ b/libpod/util.go
@@ -9,8 +9,10 @@ import (
 	"strings"
 	"time"
 
+	"github.com/containerd/cgroups"
 	"github.com/containers/image/signature"
 	"github.com/containers/image/types"
+	"github.com/containers/libpod/pkg/util"
 	spec "github.com/opencontainers/runtime-spec/specs-go"
 	"github.com/pkg/errors"
 )
@@ -160,3 +162,26 @@ func validPodNSOption(p *Pod, ctrPod string) error {
 	}
 	return nil
 }
+
+// GetV1CGroups gets the V1 cgroup subsystems and then "filters"
+// out any subsystems that are provided by the caller.  Passing nil
+// for excludes will return the subsystems unfiltered.
+//func GetV1CGroups(excludes []string) ([]cgroups.Subsystem, error) {
+func GetV1CGroups(excludes []string) cgroups.Hierarchy {
+	return func() ([]cgroups.Subsystem, error) {
+		var filtered []cgroups.Subsystem
+
+		subSystem, err := cgroups.V1()
+		if err != nil {
+			return nil, err
+		}
+		for _, s := range subSystem {
+			// If the name of the subsystem is not in the list of excludes, then
+			// add it as a keeper.
+			if !util.StringInSlice(string(s.Name()), excludes) {
+				filtered = append(filtered, s)
+			}
+		}
+		return filtered, nil
+	}
+}