github.com/mirantis/virtlet@v1.5.2-0.20191204181327-1659b8a48e9b/pkg/libvirttools/block_volumesource_test.go (about)

     1  /*
     2  Copyright 2018 Mirantis
     3  
     4  Licensed under the Apache License, Version 2.0 (the "License");
     5  you may not use this file except in compliance with the License.
     6  You may obtain a copy of the License at
     7  
     8      http://www.apache.org/licenses/LICENSE-2.0
     9  
    10  Unless required by applicable law or agreed to in writing, software
    11  distributed under the License is distributed on an "AS IS" BASIS,
    12  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13  See the License for the specific language governing permissions and
    14  limitations under the License.
    15  */
    16  
    17  package libvirttools
    18  
    19  import (
    20  	"encoding/xml"
    21  	"io/ioutil"
    22  	"os"
    23  	"path/filepath"
    24  	"reflect"
    25  	"testing"
    26  
    27  	libvirtxml "github.com/libvirt/libvirt-go-xml"
    28  
    29  	"github.com/Mirantis/virtlet/pkg/metadata/types"
    30  )
    31  
    32  func TestBlockVolumeSource(t *testing.T) {
    33  	tmpDir, err := ioutil.TempDir("", "block-vol-test-")
    34  	if err != nil {
    35  		t.Fatalf("TempDir() returned: %v", err)
    36  	}
    37  	defer os.RemoveAll(tmpDir)
    38  
    39  	// On Mac, /tmp is a symlink and it may make this test fail
    40  	// unless we eval it
    41  	baseDir, err := filepath.EvalSymlinks(tmpDir)
    42  	if err != nil {
    43  		t.Fatal(err)
    44  	}
    45  
    46  	devs := []string{
    47  		filepath.Join(baseDir, "test1"),
    48  		filepath.Join(baseDir, "test2"),
    49  	}
    50  	for _, dev := range devs {
    51  		if f, err := os.OpenFile(dev, os.O_RDONLY|os.O_CREATE, 0666); err != nil {
    52  			t.Fatal(err)
    53  		} else {
    54  			f.Close()
    55  		}
    56  	}
    57  	symlinkName := filepath.Join(baseDir, "test2link")
    58  	if err := os.Symlink(devs[1], symlinkName); err != nil {
    59  		t.Fatal(err)
    60  	}
    61  
    62  	volumes, err := GetBlockVolumes(&types.VMConfig{
    63  		VolumeDevices: []types.VMVolumeDevice{
    64  			{
    65  				DevicePath: "/dev/test1",
    66  				HostPath:   devs[0],
    67  			},
    68  			{
    69  				DevicePath: "/dev/test1",
    70  				HostPath:   symlinkName,
    71  			},
    72  		},
    73  	}, nil)
    74  	if err != nil {
    75  		t.Fatalf("GetRootVolume returned an error: %v", err)
    76  	}
    77  
    78  	expectedDisks := []*libvirtxml.DomainDisk{
    79  		{
    80  			Device: "disk",
    81  			Source: &libvirtxml.DomainDiskSource{Block: &libvirtxml.DomainDiskSourceBlock{Dev: devs[0]}},
    82  			Driver: &libvirtxml.DomainDiskDriver{Name: "qemu", Type: "raw"},
    83  		},
    84  		{
    85  			Device: "disk",
    86  			Source: &libvirtxml.DomainDiskSource{Block: &libvirtxml.DomainDiskSourceBlock{Dev: devs[1]}},
    87  			Driver: &libvirtxml.DomainDiskDriver{Name: "qemu", Type: "raw"},
    88  		},
    89  	}
    90  	var disks []*libvirtxml.DomainDisk
    91  	for _, vol := range volumes {
    92  		if disk, _, err := vol.Setup(); err != nil {
    93  			t.Fatal(err)
    94  		} else {
    95  			disks = append(disks, disk)
    96  		}
    97  	}
    98  	if !reflect.DeepEqual(expectedDisks, disks) {
    99  		expected, err := xml.MarshalIndent(expectedDisks, "", "  ")
   100  		if err != nil {
   101  			t.Fatal(err)
   102  		}
   103  		actual, err := xml.MarshalIndent(disks, "", "  ")
   104  		if err != nil {
   105  			t.Fatal(err)
   106  		}
   107  		t.Errorf("Bad disk defs generated. Expected:\n%s\nGot:\n%s", expected, actual)
   108  	}
   109  	// TODO: symlink
   110  }