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Cleanup links top level pkg

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- Move top level pkg links under daemon
- Refactor code accordingly
- golint pkg

Signed-off-by: Antonio Murdaca <runcom@linux.com>
This commit is contained in:
Antonio Murdaca 2015-07-21 00:19:05 +02:00
parent 2c162292b7
commit 0e0c7e521c
6 changed files with 50 additions and 122 deletions
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2
daemon/container.go
View file

@ -333,8 +333,6 @@ func (container *Container) isNetworkAllocated() bool {
func (container *Container) cleanup() {
container.ReleaseNetwork()
disableAllActiveLinks(container)
if err := container.CleanupStorage(); err != nil {
logrus.Errorf("%v: Failed to cleanup storage: %v", container.ID, err)
}

51
daemon/container_unix.go
View file

@ -16,8 +16,8 @@ import (
"github.com/Sirupsen/logrus"
"github.com/docker/docker/daemon/execdriver"
"github.com/docker/docker/daemon/links"
"github.com/docker/docker/daemon/network"
"github.com/docker/docker/links"
"github.com/docker/docker/pkg/archive"
"github.com/docker/docker/pkg/directory"
"github.com/docker/docker/pkg/ioutils"
@ -81,23 +81,12 @@ func (container *Container) setupLinkedContainers() ([]string, error) {
}
if len(children) > 0 {
container.activeLinks = make(map[string]*links.Link, len(children))
// If we encounter an error make sure that we rollback any network
// config and iptables changes
rollback := func() {
for _, link := range container.activeLinks {
link.Disable()
}
container.activeLinks = nil
}
for linkAlias, child := range children {
if !child.IsRunning() {
return nil, fmt.Errorf("Cannot link to a non running container: %s AS %s", child.Name, linkAlias)
}
link, err := links.NewLink(
link := links.NewLink(
container.NetworkSettings.IPAddress,
child.NetworkSettings.IPAddress,
linkAlias,
@ -105,17 +94,6 @@ func (container *Container) setupLinkedContainers() ([]string, error) {
child.Config.ExposedPorts,
)
if err != nil {
rollback()
return nil, err
}
container.activeLinks[link.Alias()] = link
if err := link.Enable(); err != nil {
rollback()
return nil, err
}
for _, envVar := range link.ToEnv() {
env = append(env, envVar)
}
@ -668,6 +646,8 @@ func (container *Container) updateNetworkSettings(n libnetwork.Network, ep libne
return nil
}
// UpdateNetwork is used to update the container's network (e.g. when linked containers
// get removed/unlinked).
func (container *Container) UpdateNetwork() error {
n, err := container.daemon.netController.NetworkByID(container.NetworkSettings.NetworkID)
if err != nil {
@ -1090,29 +1070,6 @@ func (container *Container) ReleaseNetwork() {
logrus.Errorf("deleting endpoint failed: %v", err)
}
}
}
func disableAllActiveLinks(container *Container) {
if container.activeLinks != nil {
for _, link := range container.activeLinks {
link.Disable()
}
}
}
func (container *Container) DisableLink(name string) {
if container.activeLinks != nil {
if link, exists := container.activeLinks[name]; exists {
link.Disable()
delete(container.activeLinks, name)
if err := container.UpdateNetwork(); err != nil {
logrus.Debugf("Could not update network to remove link: %v", err)
}
} else {
logrus.Debugf("Could not find active link for %s", name)
}
}
}
func (container *Container) UnmountVolumes(forceSyscall bool) error {

10
daemon/container_windows.go
View file

@ -155,6 +155,10 @@ func (container *Container) ExportRw() (archive.Archive, error) {
return nil, nil
}
func (container *Container) UpdateNetwork() error {
return nil
}
func (container *Container) ReleaseNetwork() {
}
@ -162,12 +166,6 @@ func (container *Container) RestoreNetwork() error {
return nil
}
func disableAllActiveLinks(container *Container) {
}
func (container *Container) DisableLink(name string) {
}
func (container *Container) UnmountVolumes(forceSyscall bool) error {
return nil
}

6
daemon/delete.go
View file

@ -32,14 +32,16 @@ func (daemon *Daemon) ContainerRm(name string, config *ContainerRmConfig) error
if pe == nil {
return fmt.Errorf("Cannot get parent %s for name %s", parent, name)
}
parentContainer, _ := daemon.Get(pe.ID())
if err := daemon.ContainerGraph().Delete(name); err != nil {
return err
}
parentContainer, _ := daemon.Get(pe.ID())
if parentContainer != nil {
parentContainer.DisableLink(n)
if err := parentContainer.UpdateNetwork(); err != nil {
logrus.Debugf("Could not update network to remove link %s: %v", n, err)
}
}
return nil

72
links/links.go → daemon/links/links.go
View file

@ -8,17 +8,22 @@ import (
"github.com/docker/docker/pkg/nat"
)
// Link struct holds informations about parent/child linked container
type Link struct {
ParentIP string
ChildIP string
Name string
// Parent container IP address
ParentIP string
// Child container IP address
ChildIP string
// Link name
Name string
// Child environments variables
ChildEnvironment []string
Ports []nat.Port
IsEnabled bool
// Child exposed ports
Ports []nat.Port
}
func NewLink(parentIP, childIP, name string, env []string, exposedPorts map[nat.Port]struct{}) (*Link, error) {
// NewLink initializes a new Link struct with the provided options.
func NewLink(parentIP, childIP, name string, env []string, exposedPorts map[nat.Port]struct{}) *Link {
var (
i int
ports = make([]nat.Port, len(exposedPorts))
@ -29,39 +34,23 @@ func NewLink(parentIP, childIP, name string, env []string, exposedPorts map[nat.
i++
}
l := &Link{
return &Link{
Name: name,
ChildIP: childIP,
ParentIP: parentIP,
ChildEnvironment: env,
Ports: ports,
}
return l, nil
}
func (l *Link) Alias() string {
_, alias := path.Split(l.Name)
return alias
}
func nextContiguous(ports []nat.Port, value int, index int) int {
if index+1 == len(ports) {
return index
}
for i := index + 1; i < len(ports); i++ {
if ports[i].Int() > value+1 {
return i - 1
}
value++
}
return len(ports) - 1
}
// ToEnv creates a string's slice containing child container informations in
// the form of environment variables which will be later exported on container
// startup.
func (l *Link) ToEnv() []string {
env := []string{}
alias := strings.Replace(strings.ToUpper(l.Alias()), "-", "_", -1)
_, n := path.Split(l.Name)
alias := strings.Replace(strings.ToUpper(n), "-", "_", -1)
if p := l.getDefaultPort(); p != nil {
env = append(env, fmt.Sprintf("%s_PORT=%s://%s:%s", alias, p.Proto(), l.ChildIP, p.Port()))
@ -119,6 +108,20 @@ func (l *Link) ToEnv() []string {
return env
}
func nextContiguous(ports []nat.Port, value int, index int) int {
if index+1 == len(ports) {
return index
}
for i := index + 1; i < len(ports); i++ {
if ports[i].Int() > value+1 {
return i - 1
}
value++
}
return len(ports) - 1
}
// Default port rules
func (l *Link) getDefaultPort() *nat.Port {
var p nat.Port
@ -136,12 +139,3 @@ func (l *Link) getDefaultPort() *nat.Port {
p = l.Ports[0]
return &p
}
func (l *Link) Enable() error {
l.IsEnabled = true
return nil
}
func (l *Link) Disable() {
l.IsEnabled = false
}

31
links/links_test.go → daemon/links/links_test.go
View file

@ -18,10 +18,7 @@ func TestLinkNaming(t *testing.T) {
ports := make(nat.PortSet)
ports[newPortNoError("tcp", "6379")] = struct{}{}
link, err := NewLink("172.0.17.3", "172.0.17.2", "/db/docker-1", nil, ports)
if err != nil {
t.Fatal(err)
}
link := NewLink("172.0.17.3", "172.0.17.2", "/db/docker-1", nil, ports)
rawEnv := link.ToEnv()
env := make(map[string]string, len(rawEnv))
@ -48,20 +45,11 @@ func TestLinkNew(t *testing.T) {
ports := make(nat.PortSet)
ports[newPortNoError("tcp", "6379")] = struct{}{}
link, err := NewLink("172.0.17.3", "172.0.17.2", "/db/docker", nil, ports)
if err != nil {
t.Fatal(err)
}
link := NewLink("172.0.17.3", "172.0.17.2", "/db/docker", nil, ports)
if link == nil {
t.FailNow()
}
if link.Name != "/db/docker" {
t.Fail()
}
if link.Alias() != "docker" {
t.Fail()
}
if link.ParentIP != "172.0.17.3" {
t.Fail()
}
@ -79,10 +67,7 @@ func TestLinkEnv(t *testing.T) {
ports := make(nat.PortSet)
ports[newPortNoError("tcp", "6379")] = struct{}{}
link, err := NewLink("172.0.17.3", "172.0.17.2", "/db/docker", []string{"PASSWORD=gordon"}, ports)
if err != nil {
t.Fatal(err)
}
link := NewLink("172.0.17.3", "172.0.17.2", "/db/docker", []string{"PASSWORD=gordon"}, ports)
rawEnv := link.ToEnv()
env := make(map[string]string, len(rawEnv))
@ -122,10 +107,7 @@ func TestLinkMultipleEnv(t *testing.T) {
ports[newPortNoError("tcp", "6380")] = struct{}{}
ports[newPortNoError("tcp", "6381")] = struct{}{}
link, err := NewLink("172.0.17.3", "172.0.17.2", "/db/docker", []string{"PASSWORD=gordon"}, ports)
if err != nil {
t.Fatal(err)
}
link := NewLink("172.0.17.3", "172.0.17.2", "/db/docker", []string{"PASSWORD=gordon"}, ports)
rawEnv := link.ToEnv()
env := make(map[string]string, len(rawEnv))
@ -171,10 +153,7 @@ func TestLinkPortRangeEnv(t *testing.T) {
ports[newPortNoError("tcp", "6380")] = struct{}{}
ports[newPortNoError("tcp", "6381")] = struct{}{}
link, err := NewLink("172.0.17.3", "172.0.17.2", "/db/docker", []string{"PASSWORD=gordon"}, ports)
if err != nil {
t.Fatal(err)
}
link := NewLink("172.0.17.3", "172.0.17.2", "/db/docker", []string{"PASSWORD=gordon"}, ports)
rawEnv := link.ToEnv()
env := make(map[string]string, len(rawEnv))