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Remove unused params from etchosts.Build()

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Signed-off-by: Rob Murray <rob.murray@docker.com>
This commit is contained in:
Rob Murray 2024-01-29 15:24:52 +00:00
parent 794f7127ef
commit 2ddec74d59
3 changed files with 24 additions and 137 deletions
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44
libnetwork/etchosts/etchosts.go
View file

@ -8,7 +8,6 @@ import (
"net/netip"
"os"
"regexp"
"strings"
"sync"
)
@ -71,56 +70,27 @@ func Drop(path string) {
// Build function
// path is path to host file string required
// IP, hostname, and domainname set main record leave empty for no master record
// extraContent is an array of extra host records.
func Build(path, IP, hostname, domainname string, extraContent []Record) error {
return build(path, IP, hostname, domainname, defaultContentIPv4, defaultContentIPv6, extraContent)
func Build(path string, extraContent []Record) error {
return build(path, defaultContentIPv4, defaultContentIPv6, extraContent)
}
// BuildNoIPv6 is the same as Build, but will not include IPv6 entries.
func BuildNoIPv6(path, IP, hostname, domainname string, extraContent []Record) error {
if isIPv6(IP) {
IP = ""
}
func BuildNoIPv6(path string, extraContent []Record) error {
var ipv4ExtraContent []Record
for _, rec := range extraContent {
if !isIPv6(rec.IP) {
addr, err := netip.ParseAddr(rec.IP)
if err != nil || !addr.Is6() {
ipv4ExtraContent = append(ipv4ExtraContent, rec)
}
}
return build(path, IP, hostname, domainname, defaultContentIPv4, ipv4ExtraContent)
return build(path, defaultContentIPv4, ipv4ExtraContent)
}
func isIPv6(s string) bool {
addr, err := netip.ParseAddr(s)
return err == nil && addr.Is6()
}
func build(path, IP, hostname, domainname string, contents ...[]Record) error {
func build(path string, contents ...[]Record) error {
defer pathLock(path)()
buf := bytes.NewBuffer(nil)
if IP != "" {
// set main record
var mainRec Record
mainRec.IP = IP
// User might have provided a FQDN in hostname or split it across hostname
// and domainname. We want the FQDN and the bare hostname.
fqdn := hostname
if domainname != "" {
fqdn += "." + domainname
}
mainRec.Hosts = fqdn
if hostName, _, ok := strings.Cut(fqdn, "."); ok {
mainRec.Hosts += " " + hostName
}
if _, err := mainRec.WriteTo(buf); err != nil {
return err
}
}
// Write content from function arguments
for _, content := range contents {

115
libnetwork/etchosts/etchosts_test.go
View file

@ -21,7 +21,7 @@ func TestBuildDefault(t *testing.T) {
// check that /etc/hosts has consistent ordering
for i := 0; i <= 5; i++ {
err = Build(file.Name(), "", "", "", nil)
err = Build(file.Name(), nil)
if err != nil {
t.Fatal(err)
}
@ -42,7 +42,7 @@ func TestBuildNoIPv6(t *testing.T) {
d := t.TempDir()
filename := filepath.Join(d, "hosts")
err := BuildNoIPv6(filename, "fdbb:c59c:d015::2", "an.example", "", []Record{
err := BuildNoIPv6(filename, []Record{
{
Hosts: "another.example",
IP: "fdbb:c59c:d015::3",
@ -58,94 +58,6 @@ func TestBuildNoIPv6(t *testing.T) {
assert.Check(t, is.DeepEqual(string(content), "127.0.0.1\tlocalhost\n10.11.12.13\tanother.example\n"))
}
func TestBuildHostnameDomainname(t *testing.T) {
file, err := os.CreateTemp("", "")
if err != nil {
t.Fatal(err)
}
defer os.Remove(file.Name())
err = Build(file.Name(), "10.11.12.13", "testhostname", "testdomainname", nil)
if err != nil {
t.Fatal(err)
}
content, err := os.ReadFile(file.Name())
if err != nil {
t.Fatal(err)
}
if expected := "10.11.12.13\ttesthostname.testdomainname testhostname\n"; !bytes.Contains(content, []byte(expected)) {
t.Fatalf("Expected to find '%s' got '%s'", expected, content)
}
}
func TestBuildHostname(t *testing.T) {
file, err := os.CreateTemp("", "")
if err != nil {
t.Fatal(err)
}
defer os.Remove(file.Name())
err = Build(file.Name(), "10.11.12.13", "testhostname", "", nil)
if err != nil {
t.Fatal(err)
}
content, err := os.ReadFile(file.Name())
if err != nil {
t.Fatal(err)
}
if expected := "10.11.12.13\ttesthostname\n"; !bytes.Contains(content, []byte(expected)) {
t.Fatalf("Expected to find '%s' got '%s'", expected, content)
}
}
func TestBuildHostnameFQDN(t *testing.T) {
file, err := os.CreateTemp("", "")
if err != nil {
t.Fatal(err)
}
defer os.Remove(file.Name())
err = Build(file.Name(), "10.11.12.13", "testhostname.testdomainname.com", "", nil)
if err != nil {
t.Fatal(err)
}
content, err := os.ReadFile(file.Name())
if err != nil {
t.Fatal(err)
}
if expected := "10.11.12.13\ttesthostname.testdomainname.com testhostname\n"; !bytes.Contains(content, []byte(expected)) {
t.Fatalf("Expected to find '%s' got '%s'", expected, content)
}
}
func TestBuildNoIP(t *testing.T) {
file, err := os.CreateTemp("", "")
if err != nil {
t.Fatal(err)
}
defer os.Remove(file.Name())
err = Build(file.Name(), "", "testhostname", "", nil)
if err != nil {
t.Fatal(err)
}
content, err := os.ReadFile(file.Name())
if err != nil {
t.Fatal(err)
}
if expected := ""; !bytes.Contains(content, []byte(expected)) {
t.Fatalf("Expected to find '%s' got '%s'", expected, content)
}
}
func TestUpdate(t *testing.T) {
file, err := os.CreateTemp("", "")
if err != nil {
@ -153,7 +65,12 @@ func TestUpdate(t *testing.T) {
}
defer os.Remove(file.Name())
if err := Build(file.Name(), "10.11.12.13", "testhostname", "testdomainname", nil); err != nil {
if err := Build(file.Name(), []Record{
{
"testhostname.testdomainname testhostname",
"10.11.12.13",
},
}); err != nil {
t.Fatal(err)
}
@ -194,7 +111,7 @@ func TestUpdateIgnoresPrefixedHostname(t *testing.T) {
}
defer os.Remove(file.Name())
if err := Build(file.Name(), "10.11.12.13", "testhostname", "testdomainname", []Record{
if err := Build(file.Name(), []Record{
{
Hosts: "prefix",
IP: "2.2.2.2",
@ -245,7 +162,7 @@ func TestDeleteIgnoresPrefixedHostname(t *testing.T) {
}
defer os.Remove(file.Name())
err = Build(file.Name(), "", "", "", nil)
err = Build(file.Name(), nil)
if err != nil {
t.Fatal(err)
}
@ -293,7 +210,7 @@ func TestAddEmpty(t *testing.T) {
}
defer os.Remove(file.Name())
err = Build(file.Name(), "", "", "", nil)
err = Build(file.Name(), nil)
if err != nil {
t.Fatal(err)
}
@ -310,7 +227,7 @@ func TestAdd(t *testing.T) {
}
defer os.Remove(file.Name())
err = Build(file.Name(), "", "", "", nil)
err = Build(file.Name(), nil)
if err != nil {
t.Fatal(err)
}
@ -341,7 +258,7 @@ func TestDeleteEmpty(t *testing.T) {
}
defer os.Remove(file.Name())
err = Build(file.Name(), "", "", "", nil)
err = Build(file.Name(), nil)
if err != nil {
t.Fatal(err)
}
@ -381,7 +298,7 @@ func TestDelete(t *testing.T) {
}
defer os.Remove(file.Name())
err = Build(file.Name(), "", "", "", nil)
err = Build(file.Name(), nil)
if err != nil {
t.Fatal(err)
}
@ -437,7 +354,7 @@ func TestConcurrentWrites(t *testing.T) {
}
defer os.Remove(file.Name())
err = Build(file.Name(), "", "", "", nil)
err = Build(file.Name(), nil)
if err != nil {
t.Fatal(err)
}
@ -502,7 +419,7 @@ func benchDelete(b *testing.B) {
b.StartTimer()
}()
err = Build(file.Name(), "", "", "", nil)
err = Build(file.Name(), nil)
if err != nil {
b.Fatal(err)
}

2
libnetwork/sandbox_dns_unix.go
View file

@ -120,7 +120,7 @@ func (sb *Sandbox) buildHostsFile() error {
if en, ok := sb.ipv6Enabled(); ok && !en {
buildf = etchosts.BuildNoIPv6
}
if err := buildf(sb.config.hostsPath, "", sb.config.hostName, sb.config.domainName, extraContent); err != nil {
if err := buildf(sb.config.hostsPath, extraContent); err != nil {
return err
}