mirror of
https://github.com/moby/moby.git
synced 2022-11-09 12:21:53 -05:00
commit
6a6be5bd5a
3 changed files with 63 additions and 23 deletions
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@ -424,7 +424,7 @@ func (container *Container) buildHostsFiles(IP string) error {
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}
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container.HostsPath = hostsPath
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extraContent := make(map[string]string)
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var extraContent []etchosts.Record
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children, err := container.daemon.Children(container.Name)
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if err != nil {
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@ -433,15 +433,15 @@ func (container *Container) buildHostsFiles(IP string) error {
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for linkAlias, child := range children {
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_, alias := path.Split(linkAlias)
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extraContent[alias] = child.NetworkSettings.IPAddress
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extraContent = append(extraContent, etchosts.Record{Hosts: alias, IP: child.NetworkSettings.IPAddress})
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}
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for _, extraHost := range container.hostConfig.ExtraHosts {
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parts := strings.Split(extraHost, ":")
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extraContent[parts[0]] = parts[1]
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extraContent = append(extraContent, etchosts.Record{Hosts: parts[0], IP: parts[1]})
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}
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return etchosts.Build(container.HostsPath, IP, container.Config.Hostname, container.Config.Domainname, &extraContent)
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return etchosts.Build(container.HostsPath, IP, container.Config.Hostname, container.Config.Domainname, extraContent)
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}
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func (container *Container) buildHostnameAndHostsFiles(IP string) error {
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@ -3,40 +3,54 @@ package etchosts
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import (
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"bytes"
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"fmt"
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"io"
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"io/ioutil"
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"regexp"
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)
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var defaultContent = map[string]string{
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"localhost": "127.0.0.1",
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"localhost ip6-localhost ip6-loopback": "::1",
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"ip6-localnet": "fe00::0",
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"ip6-mcastprefix": "ff00::0",
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"ip6-allnodes": "ff02::1",
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"ip6-allrouters": "ff02::2",
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type Record struct {
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Hosts string
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IP string
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}
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func Build(path, IP, hostname, domainname string, extraContent *map[string]string) error {
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func (r Record) WriteTo(w io.Writer) (int64, error) {
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n, err := fmt.Fprintf(w, "%s\t%s\n", r.IP, r.Hosts)
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return int64(n), err
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}
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var defaultContent = []Record{
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{Hosts: "localhost", IP: "127.0.0.1"},
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{Hosts: "localhost ip6-localhost ip6-loopback", IP: "::1"},
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{Hosts: "ip6-localnet", IP: "fe00::0"},
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{Hosts: "ip6-mcastprefix", IP: "ff00::0"},
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{Hosts: "ip6-allnodes", IP: "ff02::1"},
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{Hosts: "ip6-allrouters", IP: "ff02::2"},
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}
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func Build(path, IP, hostname, domainname string, extraContent []Record) error {
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content := bytes.NewBuffer(nil)
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if IP != "" {
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var mainRec Record
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mainRec.IP = IP
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if domainname != "" {
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content.WriteString(fmt.Sprintf("%s\t%s.%s %s\n", IP, hostname, domainname, hostname))
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mainRec.Hosts = fmt.Sprintf("%s.%s %s", hostname, domainname, hostname)
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} else {
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content.WriteString(fmt.Sprintf("%s\t%s\n", IP, hostname))
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mainRec.Hosts = hostname
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}
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}
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for hosts, ip := range defaultContent {
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if _, err := content.WriteString(fmt.Sprintf("%s\t%s\n", ip, hosts)); err != nil {
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if _, err := mainRec.WriteTo(content); err != nil {
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return err
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}
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}
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if extraContent != nil {
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for hosts, ip := range *extraContent {
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if _, err := content.WriteString(fmt.Sprintf("%s\t%s\n", ip, hosts)); err != nil {
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return err
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}
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for _, r := range defaultContent {
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if _, err := r.WriteTo(content); err != nil {
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return err
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}
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}
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for _, r := range extraContent {
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if _, err := r.WriteTo(content); err != nil {
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return err
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}
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}
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@ -7,6 +7,32 @@ import (
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"testing"
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)
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func TestBuildDefault(t *testing.T) {
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file, err := ioutil.TempFile("", "")
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if err != nil {
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t.Fatal(err)
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}
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defer os.Remove(file.Name())
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// check that /etc/hosts has consistent ordering
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for i := 0; i <= 5; i++ {
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err = Build(file.Name(), "", "", "", nil)
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if err != nil {
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t.Fatal(err)
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}
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content, err := ioutil.ReadFile(file.Name())
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if err != nil {
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t.Fatal(err)
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}
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expected := "127.0.0.1\tlocalhost\n::1\tlocalhost ip6-localhost ip6-loopback\nfe00::0\tip6-localnet\nff00::0\tip6-mcastprefix\nff02::1\tip6-allnodes\nff02::2\tip6-allrouters\n"
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if expected != string(content) {
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t.Fatalf("Expected to find '%s' got '%s'", expected, content)
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}
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}
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}
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func TestBuildHostnameDomainname(t *testing.T) {
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file, err := ioutil.TempFile("", "")
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if err != nil {
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