github.com/moby/docker@v26.1.3+incompatible/libnetwork/sandbox_dns_unix_test.go (about)

     1  //go:build !windows
     2  
     3  package libnetwork
     4  
     5  import (
     6  	"runtime"
     7  	"testing"
     8  
     9  	"github.com/docker/docker/libnetwork/resolvconf"
    10  	"gotest.tools/v3/assert"
    11  	is "gotest.tools/v3/assert/cmp"
    12  	"gotest.tools/v3/skip"
    13  )
    14  
    15  func TestDNSOptions(t *testing.T) {
    16  	skip.If(t, runtime.GOOS == "windows", "test only works on linux")
    17  
    18  	c, err := New(OptionBoltdbWithRandomDBFile(t))
    19  	assert.NilError(t, err)
    20  
    21  	sb, err := c.NewSandbox("cnt1", nil)
    22  	assert.NilError(t, err)
    23  
    24  	cleanup := func(s *Sandbox) {
    25  		if err := s.Delete(); err != nil {
    26  			t.Error(err)
    27  		}
    28  	}
    29  
    30  	defer cleanup(sb)
    31  	sb.startResolver(false)
    32  
    33  	err = sb.setupDNS()
    34  	assert.NilError(t, err)
    35  	err = sb.rebuildDNS()
    36  	assert.NilError(t, err)
    37  	currRC, err := resolvconf.GetSpecific(sb.config.resolvConfPath)
    38  	assert.NilError(t, err)
    39  	dnsOptionsList := resolvconf.GetOptions(currRC.Content)
    40  	assert.Check(t, is.Len(dnsOptionsList, 1))
    41  	assert.Check(t, is.Equal("ndots:0", dnsOptionsList[0]))
    42  
    43  	sb.config.dnsOptionsList = []string{"ndots:5"}
    44  	err = sb.setupDNS()
    45  	assert.NilError(t, err)
    46  	currRC, err = resolvconf.GetSpecific(sb.config.resolvConfPath)
    47  	assert.NilError(t, err)
    48  	dnsOptionsList = resolvconf.GetOptions(currRC.Content)
    49  	assert.Check(t, is.Len(dnsOptionsList, 1))
    50  	assert.Check(t, is.Equal("ndots:5", dnsOptionsList[0]))
    51  
    52  	err = sb.rebuildDNS()
    53  	assert.NilError(t, err)
    54  	currRC, err = resolvconf.GetSpecific(sb.config.resolvConfPath)
    55  	assert.NilError(t, err)
    56  	dnsOptionsList = resolvconf.GetOptions(currRC.Content)
    57  	assert.Check(t, is.Len(dnsOptionsList, 1))
    58  	assert.Check(t, is.Equal("ndots:5", dnsOptionsList[0]))
    59  
    60  	sb2, err := c.NewSandbox("cnt2", nil)
    61  	assert.NilError(t, err)
    62  	defer cleanup(sb2)
    63  	sb2.startResolver(false)
    64  
    65  	sb2.config.dnsOptionsList = []string{"ndots:0"}
    66  	err = sb2.setupDNS()
    67  	assert.NilError(t, err)
    68  	err = sb2.rebuildDNS()
    69  	assert.NilError(t, err)
    70  	currRC, err = resolvconf.GetSpecific(sb2.config.resolvConfPath)
    71  	assert.NilError(t, err)
    72  	dnsOptionsList = resolvconf.GetOptions(currRC.Content)
    73  	assert.Check(t, is.Len(dnsOptionsList, 1))
    74  	assert.Check(t, is.Equal("ndots:0", dnsOptionsList[0]))
    75  
    76  	sb2.config.dnsOptionsList = []string{"ndots:foobar"}
    77  	err = sb2.setupDNS()
    78  	assert.NilError(t, err)
    79  	err = sb2.rebuildDNS()
    80  	assert.NilError(t, err)
    81  	currRC, err = resolvconf.GetSpecific(sb2.config.resolvConfPath)
    82  	assert.NilError(t, err)
    83  	dnsOptionsList = resolvconf.GetOptions(currRC.Content)
    84  	assert.Check(t, is.DeepEqual([]string{"ndots:0"}, dnsOptionsList))
    85  
    86  	sb2.config.dnsOptionsList = []string{"ndots:-1"}
    87  	err = sb2.setupDNS()
    88  	assert.NilError(t, err)
    89  	err = sb2.rebuildDNS()
    90  	assert.NilError(t, err)
    91  	currRC, err = resolvconf.GetSpecific(sb2.config.resolvConfPath)
    92  	assert.NilError(t, err)
    93  	dnsOptionsList = resolvconf.GetOptions(currRC.Content)
    94  	assert.Check(t, is.DeepEqual([]string{"ndots:0"}, dnsOptionsList))
    95  }