110 lines
2.2 KiB
Go
110 lines
2.2 KiB
Go
/*
|
|
Copyright The containerd Authors.
|
|
|
|
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 sys
|
|
|
|
import (
|
|
"errors"
|
|
"os"
|
|
"os/exec"
|
|
"testing"
|
|
"time"
|
|
|
|
"gotest.tools/v3/assert"
|
|
is "gotest.tools/v3/assert/cmp"
|
|
)
|
|
|
|
func TestSetPositiveOomScoreAdjustment(t *testing.T) {
|
|
_, adjustment, err := adjustOom(123)
|
|
if err != nil {
|
|
t.Error(err)
|
|
return
|
|
}
|
|
assert.Check(t, is.Equal(adjustment, 123))
|
|
}
|
|
|
|
func TestSetNegativeOomScoreAdjustmentWhenPrivileged(t *testing.T) {
|
|
if RunningUnprivileged() {
|
|
t.Skip("Needs to be run as root")
|
|
return
|
|
}
|
|
|
|
_, adjustment, err := adjustOom(-123)
|
|
if err != nil {
|
|
t.Error(err)
|
|
return
|
|
}
|
|
assert.Check(t, is.Equal(adjustment, -123))
|
|
}
|
|
|
|
func TestSetNegativeOomScoreAdjustmentWhenUnprivilegedHasNoEffect(t *testing.T) {
|
|
if RunningPrivileged() {
|
|
t.Skip("Needs to be run as non-root")
|
|
return
|
|
}
|
|
|
|
initial, adjustment, err := adjustOom(-123)
|
|
if err != nil {
|
|
t.Error(err)
|
|
return
|
|
}
|
|
assert.Check(t, is.Equal(adjustment, initial))
|
|
}
|
|
|
|
func adjustOom(adjustment int) (int, int, error) {
|
|
cmd := exec.Command("sleep", "100")
|
|
if err := cmd.Start(); err != nil {
|
|
return 0, 0, err
|
|
}
|
|
|
|
defer cmd.Process.Kill()
|
|
|
|
pid, err := waitForPid(cmd.Process)
|
|
if err != nil {
|
|
return 0, 0, err
|
|
}
|
|
initial, err := GetOOMScoreAdj(pid)
|
|
if err != nil {
|
|
return 0, 0, err
|
|
}
|
|
|
|
if err := SetOOMScore(pid, adjustment); err != nil {
|
|
return 0, 0, err
|
|
}
|
|
|
|
adj, err := GetOOMScoreAdj(pid)
|
|
return initial, adj, err
|
|
}
|
|
|
|
func waitForPid(process *os.Process) (int, error) {
|
|
c := make(chan int, 1)
|
|
go func() {
|
|
for {
|
|
pid := process.Pid
|
|
if pid != 0 {
|
|
c <- pid
|
|
}
|
|
}
|
|
}()
|
|
|
|
select {
|
|
case pid := <-c:
|
|
return pid, nil
|
|
case <-time.After(10 * time.Second):
|
|
return 0, errors.New("process did not start in 10 seconds")
|
|
}
|
|
}
|