1fdcea28e5
Issue #26093 identified pidof as one of the dependencies of kublet which could be worked around. In this PR, we just look at /proc to construct the list of pids we need for a specified process instead of running "pidof" executable Related to #26093
73 lines
2.1 KiB
Go
73 lines
2.1 KiB
Go
/*
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Copyright 2015 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package procfs
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import (
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"io/ioutil"
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"os"
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"path/filepath"
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"runtime"
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"testing"
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"github.com/stretchr/testify/assert"
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)
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func verifyContainerName(procCgroupText, expectedName string, expectedErr bool, t *testing.T) {
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name, err := containerNameFromProcCgroup(procCgroupText)
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if expectedErr && err == nil {
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t.Errorf("Expected error but did not get error in verifyContainerName")
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return
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} else if !expectedErr && err != nil {
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t.Errorf("Expected no error, but got error %+v in verifyContainerName", err)
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return
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} else if expectedErr {
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return
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}
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if name != expectedName {
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t.Errorf("Expected container name %s but got name %s", expectedName, name)
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}
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}
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func TestContainerNameFromProcCgroup(t *testing.T) {
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procCgroupValid := "2:devices:docker/kubelet"
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verifyContainerName(procCgroupValid, "docker/kubelet", false, t)
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procCgroupEmpty := ""
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verifyContainerName(procCgroupEmpty, "", true, t)
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content, err := ioutil.ReadFile("example_proc_cgroup")
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if err != nil {
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t.Errorf("Could not read example /proc cgroup file")
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}
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verifyContainerName(string(content), "/user/1000.user/c1.session", false, t)
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procCgroupNoDevice := "2:freezer:docker/kubelet\n5:cpuacct:pkg/kubectl"
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verifyContainerName(procCgroupNoDevice, "", true, t)
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procCgroupInvalid := "devices:docker/kubelet\ncpuacct:pkg/kubectl"
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verifyContainerName(procCgroupInvalid, "", true, t)
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}
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func TestPidOf(t *testing.T) {
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if runtime.GOOS == "darwin" || runtime.GOOS == "windows" {
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t.Skipf("not supported on GOOS=%s", runtime.GOOS)
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}
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pids := PidOf(filepath.Base(os.Args[0]))
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assert.NotZero(t, pids)
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assert.Contains(t, pids, os.Getpid())
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}
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