Bump cgroups pkg to e950a27f3faf567abbf995bfbec90

Signed-off-by: Michael Crosby <crosbymichael@gmail.com>

vendor.conf

@@ -1,6 +1,6 @@
 github.com/crosbymichael/go-runc 65847bfc51952703ca24b564d10de50d3f2db6e7
 github.com/crosbymichael/console f13f890e20a94bdec6c328cdf9410b7158f0cfa4
-github.com/crosbymichael/cgroups a692a19766b072b86d89620c97a7916b2e2de3e7
+github.com/crosbymichael/cgroups e950a27f3faf567abbf995bfbec90eaddc766d25
 github.com/docker/go-metrics 8fd5772bf1584597834c6f7961a530f06cbfbb87
 github.com/prometheus/client_golang v0.8.0
 github.com/prometheus/client_model fa8ad6fec33561be4280a8f0514318c79d7f6cb6

vendor/github.com/crosbymichael/cgroups/prometheus/metrics.go

@@ -16,6 +16,10 @@ var (
 	ErrCgroupNotExists  = errors.New("cgroup does not exist in the collector")
 )
 
+// Trigger will be called when an event happens and provides the cgroup
+// where the event originated from
+type Trigger func(string, cgroups.Cgroup)
+
 // New registers the Collector with the provided namespace and returns it so
 // that cgroups can be added for collection
 func New(ns *metrics.Namespace) *Collector {

vendor/github.com/crosbymichael/cgroups/prometheus/oom.go

@@ -33,11 +33,12 @@ type OOMCollector struct {
 }
 
 type oom struct {
-	id string
-	c  cgroups.Cgroup
+	id       string
+	c        cgroups.Cgroup
+	triggers []Trigger
 }
 
-func (o *OOMCollector) Add(id string, cg cgroups.Cgroup) error {
+func (o *OOMCollector) Add(id string, cg cgroups.Cgroup, triggers ...Trigger) error {
 	o.mu.Lock()
 	defer o.mu.Unlock()
 	fd, err := cg.OOMEventFD()
@@ -45,8 +46,9 @@ func (o *OOMCollector) Add(id string, cg cgroups.Cgroup) error {
 		return err
 	}
 	o.set[fd] = &oom{
-		id: id,
-		c:  cg,
+		id:       id,
+		c:        cg,
+		triggers: triggers,
 	}
 	// set the gauge's default value
 	o.memoryOOM.WithValues(id).Set(0)
@@ -102,6 +104,9 @@ func (o *OOMCollector) process(fd uintptr, event uint32) {
 		return
 	}
 	o.memoryOOM.WithValues(info.id).Inc(1)
+	for _, t := range info.triggers {
+		t(info.id, info.c)
+	}
 }
 
 func flush(fd uintptr) error {