github.com/minio/madmin-go@v1.7.5/cgroup/linux_test.go (about)

     1  //go:build linux
     2  // +build linux
     3  
     4  //
     5  // MinIO Object Storage (c) 2022 MinIO, Inc.
     6  //
     7  // Licensed under the Apache License, Version 2.0 (the "License");
     8  // you may not use this file except in compliance with the License.
     9  // You may obtain a copy of the License at
    10  //
    11  //      http://www.apache.org/licenses/LICENSE-2.0
    12  //
    13  // Unless required by applicable law or agreed to in writing, software
    14  // distributed under the License is distributed on an "AS IS" BASIS,
    15  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    16  // See the License for the specific language governing permissions and
    17  // limitations under the License.
    18  //
    19  
    20  package cgroup
    21  
    22  import (
    23  	"io/ioutil"
    24  	"os"
    25  	"testing"
    26  )
    27  
    28  // Testing parsing correctness for various process cgroup files.
    29  func TestProcCGroup(t *testing.T) {
    30  	tmpPath, err := ioutil.TempFile("", "cgroup")
    31  	if err != nil {
    32  		t.Fatal(err)
    33  	}
    34  	defer os.Remove(tmpPath.Name())
    35  
    36  	cgroup := `
    37  11:memory:/user.slice
    38  10:blkio:/user.slice
    39  9:hugetlb:/
    40  8:net_cls,net_prio:/
    41  7:perf_event:/
    42  6:pids:/user.slice/user-1000.slice
    43  5:devices:/user.slice
    44  4:cpuset:/
    45  3:cpu,cpuacct:/user.slice
    46  2:freezer:/
    47  1:name=systemd:/user.slice/user-1000.slice/session-1.scope
    48  `
    49  	_, err = tmpPath.WriteString(cgroup)
    50  	if err != nil {
    51  		t.Fatal(err)
    52  	}
    53  
    54  	// Seek back to read from the beginning.
    55  	tmpPath.Seek(0, 0)
    56  
    57  	cg, err := parseProcCGroup(tmpPath)
    58  	if err != nil {
    59  		t.Fatal(err)
    60  	}
    61  
    62  	path := cg["memory"]
    63  	if len(path) == 0 {
    64  		t.Fatal("Path component cannot be empty")
    65  	}
    66  
    67  	if path != "/user.slice" {
    68  		t.Fatal("Path component cannot be empty")
    69  	}
    70  
    71  	path = cg["systemd"]
    72  	if path != "/user.slice/user-1000.slice/session-1.scope" {
    73  		t.Fatal("Path component cannot be empty")
    74  	}
    75  
    76  	// Mixed cgroups with different group names.
    77  	cgroup = `
    78  11:memory:/newtest/newtest
    79  10:blkio:/user.slice
    80  9:hugetlb:/
    81  8:net_cls,net_prio:/
    82  7:perf_event:/
    83  6:pids:/user.slice/user-1000.slice
    84  5:devices:/user.slice
    85  4:cpuset:/
    86  3:cpu,cpuacct:/newtest/newtest
    87  2:freezer:/
    88  1:name=systemd:/user.slice/user-1000.slice/session-1.scope
    89  `
    90  
    91  	// Seek back to read from the beginning.
    92  	tmpPath.Seek(0, 0)
    93  
    94  	_, err = tmpPath.WriteString(cgroup)
    95  	if err != nil {
    96  		t.Fatal(err)
    97  	}
    98  
    99  	// Seek back to read from the beginning.
   100  	tmpPath.Seek(0, 0)
   101  
   102  	cg, err = parseProcCGroup(tmpPath)
   103  	if err != nil {
   104  		t.Fatal(err)
   105  	}
   106  
   107  	path = cg["memory"]
   108  	if path != "/newtest/newtest" {
   109  		t.Fatal("Path component cannot be empty")
   110  	}
   111  
   112  	path = cg["systemd"]
   113  	if path != "/user.slice/user-1000.slice/session-1.scope" {
   114  		t.Fatal("Path component cannot be empty")
   115  	}
   116  }
   117  
   118  // Tests cgroup memory limit path construction.
   119  func TestMemoryLimitPath(t *testing.T) {
   120  	testCases := []struct {
   121  		cgroupPath   string
   122  		expectedPath string
   123  	}{
   124  		{
   125  			cgroupPath:   "/user.slice",
   126  			expectedPath: "/sys/fs/cgroup/memory/user.slice/memory.limit_in_bytes",
   127  		},
   128  		{
   129  			cgroupPath:   "/docker/testing",
   130  			expectedPath: "/sys/fs/cgroup/memory/memory.limit_in_bytes",
   131  		},
   132  	}
   133  
   134  	for i, testCase := range testCases {
   135  		actualPath := getMemoryLimitFilePath(testCase.cgroupPath)
   136  		if actualPath != testCase.expectedPath {
   137  			t.Fatalf("Test: %d: Expected: %s, got %s", i+1, testCase.expectedPath, actualPath)
   138  		}
   139  	}
   140  }