Add sandbox to cgroup

Sandbox creation uses the limits and reservations configured in the
OCI spec and set cgroup options accordinly. Then it puts both the
sandbox and gofer processes inside the cgroup.

It also allows the cgroup to be pre-configured by the caller. If the
cgroup already exists, sandbox and gofer processes will join the
cgroup but it will not modify the cgroup with spec limits.

PiperOrigin-RevId: 216538209
Change-Id: If2c65ffedf55820baab743a0edcfb091b89c1019

1 files changed, 56 insertions, 0 deletions

diff --git a/runsc/cgroup/cgroup_test.go b/runsc/cgroup/cgroup_test.go
new file mode 100644
index 000000000..cde915329
--- /dev/null
+++ b/runsc/cgroup/cgroup_test.go
@@ -0,0 +1,56 @@
+// Copyright 2018 Google Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package cgroup
+
+import (
+	"testing"
+)
+
+func TestCountCpuset(t *testing.T) {
+	for _, tc := range []struct {
+		str   string
+		want  int
+		error bool
+	}{
+		{str: "0", want: 1},
+		{str: "0,1,2,8,9,10", want: 6},
+		{str: "0-1", want: 2},
+		{str: "0-7", want: 8},
+		{str: "0-7,16,32-39,64,65", want: 19},
+		{str: "a", error: true},
+		{str: "5-a", error: true},
+		{str: "a-5", error: true},
+		{str: "-10", error: true},
+		{str: "15-", error: true},
+		{str: "-", error: true},
+		{str: "--", error: true},
+	} {
+		t.Run(tc.str, func(t *testing.T) {
+			got, err := countCpuset(tc.str)
+			if tc.error {
+				if err == nil {
+					t.Errorf("countCpuset(%q) should have failed", tc.str)
+				}
+			} else {
+				if err != nil {
+					t.Errorf("countCpuset(%q) failed: %v", tc.str, err)
+				}
+				if tc.want != got {
+					t.Errorf("countCpuset(%q) want: %d, got: %d", tc.str, tc.want, got)
+				}
+			}
+		})
+	}
+}