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1116 lines
32 KiB
Go
1116 lines
32 KiB
Go
package daemon // import "github.com/docker/docker/daemon"
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import (
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"errors"
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"fmt"
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"net"
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"os"
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"path"
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"runtime"
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"strings"
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"time"
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containertypes "github.com/docker/docker/api/types/container"
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networktypes "github.com/docker/docker/api/types/network"
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"github.com/docker/docker/container"
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"github.com/docker/docker/daemon/network"
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"github.com/docker/docker/errdefs"
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"github.com/docker/docker/opts"
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"github.com/docker/docker/pkg/stringid"
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"github.com/docker/docker/runconfig"
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"github.com/docker/go-connections/nat"
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"github.com/docker/libnetwork"
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netconst "github.com/docker/libnetwork/datastore"
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"github.com/docker/libnetwork/netlabel"
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"github.com/docker/libnetwork/options"
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"github.com/docker/libnetwork/types"
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"github.com/sirupsen/logrus"
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)
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var (
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// ErrRootFSReadOnly is returned when a container
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// rootfs is marked readonly.
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ErrRootFSReadOnly = errors.New("container rootfs is marked read-only")
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getPortMapInfo = container.GetSandboxPortMapInfo
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)
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func (daemon *Daemon) getDNSSearchSettings(container *container.Container) []string {
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if len(container.HostConfig.DNSSearch) > 0 {
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return container.HostConfig.DNSSearch
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}
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if len(daemon.configStore.DNSSearch) > 0 {
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return daemon.configStore.DNSSearch
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}
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return nil
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}
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func (daemon *Daemon) buildSandboxOptions(container *container.Container) ([]libnetwork.SandboxOption, error) {
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var (
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sboxOptions []libnetwork.SandboxOption
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err error
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dns []string
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dnsOptions []string
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bindings = make(nat.PortMap)
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pbList []types.PortBinding
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exposeList []types.TransportPort
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)
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defaultNetName := runconfig.DefaultDaemonNetworkMode().NetworkName()
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sboxOptions = append(sboxOptions, libnetwork.OptionHostname(container.Config.Hostname),
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libnetwork.OptionDomainname(container.Config.Domainname))
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if container.HostConfig.NetworkMode.IsHost() {
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sboxOptions = append(sboxOptions, libnetwork.OptionUseDefaultSandbox())
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if len(container.HostConfig.ExtraHosts) == 0 {
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sboxOptions = append(sboxOptions, libnetwork.OptionOriginHostsPath("/etc/hosts"))
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}
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if len(container.HostConfig.DNS) == 0 && len(daemon.configStore.DNS) == 0 &&
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len(container.HostConfig.DNSSearch) == 0 && len(daemon.configStore.DNSSearch) == 0 &&
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len(container.HostConfig.DNSOptions) == 0 && len(daemon.configStore.DNSOptions) == 0 {
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sboxOptions = append(sboxOptions, libnetwork.OptionOriginResolvConfPath("/etc/resolv.conf"))
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}
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} else {
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// OptionUseExternalKey is mandatory for userns support.
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// But optional for non-userns support
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sboxOptions = append(sboxOptions, libnetwork.OptionUseExternalKey())
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}
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if err = setupPathsAndSandboxOptions(container, &sboxOptions); err != nil {
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return nil, err
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}
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if len(container.HostConfig.DNS) > 0 {
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dns = container.HostConfig.DNS
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} else if len(daemon.configStore.DNS) > 0 {
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dns = daemon.configStore.DNS
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}
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for _, d := range dns {
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sboxOptions = append(sboxOptions, libnetwork.OptionDNS(d))
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}
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dnsSearch := daemon.getDNSSearchSettings(container)
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for _, ds := range dnsSearch {
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sboxOptions = append(sboxOptions, libnetwork.OptionDNSSearch(ds))
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}
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if len(container.HostConfig.DNSOptions) > 0 {
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dnsOptions = container.HostConfig.DNSOptions
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} else if len(daemon.configStore.DNSOptions) > 0 {
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dnsOptions = daemon.configStore.DNSOptions
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}
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for _, ds := range dnsOptions {
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sboxOptions = append(sboxOptions, libnetwork.OptionDNSOptions(ds))
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}
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if container.NetworkSettings.SecondaryIPAddresses != nil {
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name := container.Config.Hostname
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if container.Config.Domainname != "" {
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name = name + "." + container.Config.Domainname
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}
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for _, a := range container.NetworkSettings.SecondaryIPAddresses {
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sboxOptions = append(sboxOptions, libnetwork.OptionExtraHost(name, a.Addr))
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}
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}
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for _, extraHost := range container.HostConfig.ExtraHosts {
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// allow IPv6 addresses in extra hosts; only split on first ":"
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if _, err := opts.ValidateExtraHost(extraHost); err != nil {
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return nil, err
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}
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parts := strings.SplitN(extraHost, ":", 2)
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sboxOptions = append(sboxOptions, libnetwork.OptionExtraHost(parts[0], parts[1]))
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}
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if container.HostConfig.PortBindings != nil {
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for p, b := range container.HostConfig.PortBindings {
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bindings[p] = []nat.PortBinding{}
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for _, bb := range b {
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bindings[p] = append(bindings[p], nat.PortBinding{
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HostIP: bb.HostIP,
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HostPort: bb.HostPort,
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})
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}
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}
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}
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portSpecs := container.Config.ExposedPorts
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ports := make([]nat.Port, len(portSpecs))
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var i int
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for p := range portSpecs {
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ports[i] = p
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i++
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}
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nat.SortPortMap(ports, bindings)
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for _, port := range ports {
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expose := types.TransportPort{}
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expose.Proto = types.ParseProtocol(port.Proto())
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expose.Port = uint16(port.Int())
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exposeList = append(exposeList, expose)
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pb := types.PortBinding{Port: expose.Port, Proto: expose.Proto}
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binding := bindings[port]
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for i := 0; i < len(binding); i++ {
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pbCopy := pb.GetCopy()
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newP, err := nat.NewPort(nat.SplitProtoPort(binding[i].HostPort))
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var portStart, portEnd int
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if err == nil {
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portStart, portEnd, err = newP.Range()
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}
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if err != nil {
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return nil, fmt.Errorf("Error parsing HostPort value(%s):%v", binding[i].HostPort, err)
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}
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pbCopy.HostPort = uint16(portStart)
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pbCopy.HostPortEnd = uint16(portEnd)
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pbCopy.HostIP = net.ParseIP(binding[i].HostIP)
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pbList = append(pbList, pbCopy)
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}
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if container.HostConfig.PublishAllPorts && len(binding) == 0 {
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pbList = append(pbList, pb)
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}
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}
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sboxOptions = append(sboxOptions,
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libnetwork.OptionPortMapping(pbList),
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libnetwork.OptionExposedPorts(exposeList))
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// Legacy Link feature is supported only for the default bridge network.
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// return if this call to build join options is not for default bridge network
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// Legacy Link is only supported by docker run --link
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bridgeSettings, ok := container.NetworkSettings.Networks[defaultNetName]
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if !ok || bridgeSettings.EndpointSettings == nil {
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return sboxOptions, nil
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}
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if bridgeSettings.EndpointID == "" {
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return sboxOptions, nil
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}
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var (
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childEndpoints, parentEndpoints []string
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cEndpointID string
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)
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children := daemon.children(container)
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for linkAlias, child := range children {
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if !isLinkable(child) {
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return nil, fmt.Errorf("Cannot link to %s, as it does not belong to the default network", child.Name)
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}
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_, alias := path.Split(linkAlias)
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// allow access to the linked container via the alias, real name, and container hostname
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aliasList := alias + " " + child.Config.Hostname
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// only add the name if alias isn't equal to the name
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if alias != child.Name[1:] {
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aliasList = aliasList + " " + child.Name[1:]
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}
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sboxOptions = append(sboxOptions, libnetwork.OptionExtraHost(aliasList, child.NetworkSettings.Networks[defaultNetName].IPAddress))
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cEndpointID = child.NetworkSettings.Networks[defaultNetName].EndpointID
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if cEndpointID != "" {
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childEndpoints = append(childEndpoints, cEndpointID)
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}
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}
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for alias, parent := range daemon.parents(container) {
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if daemon.configStore.DisableBridge || !container.HostConfig.NetworkMode.IsPrivate() {
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continue
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}
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_, alias = path.Split(alias)
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logrus.Debugf("Update /etc/hosts of %s for alias %s with ip %s", parent.ID, alias, bridgeSettings.IPAddress)
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sboxOptions = append(sboxOptions, libnetwork.OptionParentUpdate(
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parent.ID,
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alias,
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bridgeSettings.IPAddress,
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))
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if cEndpointID != "" {
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parentEndpoints = append(parentEndpoints, cEndpointID)
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}
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}
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linkOptions := options.Generic{
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netlabel.GenericData: options.Generic{
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"ParentEndpoints": parentEndpoints,
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"ChildEndpoints": childEndpoints,
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},
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}
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sboxOptions = append(sboxOptions, libnetwork.OptionGeneric(linkOptions))
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return sboxOptions, nil
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}
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func (daemon *Daemon) updateNetworkSettings(container *container.Container, n libnetwork.Network, endpointConfig *networktypes.EndpointSettings) error {
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if container.NetworkSettings == nil {
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container.NetworkSettings = &network.Settings{Networks: make(map[string]*network.EndpointSettings)}
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}
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if !container.HostConfig.NetworkMode.IsHost() && containertypes.NetworkMode(n.Type()).IsHost() {
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return runconfig.ErrConflictHostNetwork
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}
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for s, v := range container.NetworkSettings.Networks {
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sn, err := daemon.FindNetwork(getNetworkID(s, v.EndpointSettings))
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if err != nil {
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continue
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}
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if sn.Name() == n.Name() {
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// If the network scope is swarm, then this
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// is an attachable network, which may not
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// be locally available previously.
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// So always update.
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if n.Info().Scope() == netconst.SwarmScope {
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continue
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}
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// Avoid duplicate config
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return nil
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}
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if !containertypes.NetworkMode(sn.Type()).IsPrivate() ||
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!containertypes.NetworkMode(n.Type()).IsPrivate() {
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return runconfig.ErrConflictSharedNetwork
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}
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if containertypes.NetworkMode(sn.Name()).IsNone() ||
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containertypes.NetworkMode(n.Name()).IsNone() {
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return runconfig.ErrConflictNoNetwork
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}
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}
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container.NetworkSettings.Networks[n.Name()] = &network.EndpointSettings{
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EndpointSettings: endpointConfig,
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}
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return nil
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}
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func (daemon *Daemon) updateEndpointNetworkSettings(container *container.Container, n libnetwork.Network, ep libnetwork.Endpoint) error {
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if err := container.BuildEndpointInfo(n, ep); err != nil {
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return err
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}
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if container.HostConfig.NetworkMode == runconfig.DefaultDaemonNetworkMode() {
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container.NetworkSettings.Bridge = daemon.configStore.BridgeConfig.Iface
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}
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return nil
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}
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// UpdateNetwork is used to update the container's network (e.g. when linked containers
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// get removed/unlinked).
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func (daemon *Daemon) updateNetwork(container *container.Container) error {
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var (
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start = time.Now()
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ctrl = daemon.netController
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sid = container.NetworkSettings.SandboxID
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)
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sb, err := ctrl.SandboxByID(sid)
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if err != nil {
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return fmt.Errorf("error locating sandbox id %s: %v", sid, err)
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}
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// Find if container is connected to the default bridge network
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var n libnetwork.Network
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for name, v := range container.NetworkSettings.Networks {
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sn, err := daemon.FindNetwork(getNetworkID(name, v.EndpointSettings))
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if err != nil {
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continue
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}
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if sn.Name() == runconfig.DefaultDaemonNetworkMode().NetworkName() {
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n = sn
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break
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}
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}
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if n == nil {
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// Not connected to the default bridge network; Nothing to do
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return nil
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}
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options, err := daemon.buildSandboxOptions(container)
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if err != nil {
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return fmt.Errorf("Update network failed: %v", err)
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}
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if err := sb.Refresh(options...); err != nil {
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return fmt.Errorf("Update network failed: Failure in refresh sandbox %s: %v", sid, err)
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}
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networkActions.WithValues("update").UpdateSince(start)
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return nil
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}
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func (daemon *Daemon) findAndAttachNetwork(container *container.Container, idOrName string, epConfig *networktypes.EndpointSettings) (libnetwork.Network, *networktypes.NetworkingConfig, error) {
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id := getNetworkID(idOrName, epConfig)
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n, err := daemon.FindNetwork(id)
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if err != nil {
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// We should always be able to find the network for a
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// managed container.
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if container.Managed {
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return nil, nil, err
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}
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}
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// If we found a network and if it is not dynamically created
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// we should never attempt to attach to that network here.
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if n != nil {
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if container.Managed || !n.Info().Dynamic() {
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return n, nil, nil
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}
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}
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var addresses []string
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if epConfig != nil && epConfig.IPAMConfig != nil {
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if epConfig.IPAMConfig.IPv4Address != "" {
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addresses = append(addresses, epConfig.IPAMConfig.IPv4Address)
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}
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if epConfig.IPAMConfig.IPv6Address != "" {
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addresses = append(addresses, epConfig.IPAMConfig.IPv6Address)
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}
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}
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var (
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config *networktypes.NetworkingConfig
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retryCount int
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)
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if n == nil && daemon.attachableNetworkLock != nil {
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daemon.attachableNetworkLock.Lock(id)
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defer daemon.attachableNetworkLock.Unlock(id)
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}
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for {
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// In all other cases, attempt to attach to the network to
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// trigger attachment in the swarm cluster manager.
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if daemon.clusterProvider != nil {
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var err error
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config, err = daemon.clusterProvider.AttachNetwork(id, container.ID, addresses)
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if err != nil {
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return nil, nil, err
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}
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}
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n, err = daemon.FindNetwork(id)
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if err != nil {
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if daemon.clusterProvider != nil {
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if err := daemon.clusterProvider.DetachNetwork(id, container.ID); err != nil {
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logrus.Warnf("Could not rollback attachment for container %s to network %s: %v", container.ID, idOrName, err)
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}
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}
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// Retry network attach again if we failed to
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// find the network after successful
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// attachment because the only reason that
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// would happen is if some other container
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// attached to the swarm scope network went down
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// and removed the network while we were in
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// the process of attaching.
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if config != nil {
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if _, ok := err.(libnetwork.ErrNoSuchNetwork); ok {
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if retryCount >= 5 {
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return nil, nil, fmt.Errorf("could not find network %s after successful attachment", idOrName)
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}
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retryCount++
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continue
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}
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}
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return nil, nil, err
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}
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break
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}
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// This container has attachment to a swarm scope
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// network. Update the container network settings accordingly.
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container.NetworkSettings.HasSwarmEndpoint = true
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return n, config, nil
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}
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// updateContainerNetworkSettings updates the network settings
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func (daemon *Daemon) updateContainerNetworkSettings(container *container.Container, endpointsConfig map[string]*networktypes.EndpointSettings) {
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var n libnetwork.Network
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mode := container.HostConfig.NetworkMode
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if container.Config.NetworkDisabled || mode.IsContainer() {
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return
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}
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networkName := mode.NetworkName()
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if mode.IsDefault() {
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networkName = daemon.netController.Config().Daemon.DefaultNetwork
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}
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|
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if mode.IsUserDefined() {
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var err error
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n, err = daemon.FindNetwork(networkName)
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if err == nil {
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networkName = n.Name()
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}
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}
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|
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if container.NetworkSettings == nil {
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container.NetworkSettings = &network.Settings{}
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}
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|
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if len(endpointsConfig) > 0 {
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if container.NetworkSettings.Networks == nil {
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container.NetworkSettings.Networks = make(map[string]*network.EndpointSettings)
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}
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|
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for name, epConfig := range endpointsConfig {
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container.NetworkSettings.Networks[name] = &network.EndpointSettings{
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EndpointSettings: epConfig,
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}
|
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}
|
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}
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|
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if container.NetworkSettings.Networks == nil {
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container.NetworkSettings.Networks = make(map[string]*network.EndpointSettings)
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container.NetworkSettings.Networks[networkName] = &network.EndpointSettings{
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EndpointSettings: &networktypes.EndpointSettings{},
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}
|
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}
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|
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// Convert any settings added by client in default name to
|
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// engine's default network name key
|
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if mode.IsDefault() {
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if nConf, ok := container.NetworkSettings.Networks[mode.NetworkName()]; ok {
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container.NetworkSettings.Networks[networkName] = nConf
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delete(container.NetworkSettings.Networks, mode.NetworkName())
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}
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}
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|
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if !mode.IsUserDefined() {
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return
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}
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// Make sure to internally store the per network endpoint config by network name
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if _, ok := container.NetworkSettings.Networks[networkName]; ok {
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return
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}
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|
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if n != nil {
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if nwConfig, ok := container.NetworkSettings.Networks[n.ID()]; ok {
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container.NetworkSettings.Networks[networkName] = nwConfig
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delete(container.NetworkSettings.Networks, n.ID())
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return
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}
|
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}
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}
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|
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func (daemon *Daemon) allocateNetwork(container *container.Container) error {
|
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start := time.Now()
|
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controller := daemon.netController
|
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|
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if daemon.netController == nil {
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return nil
|
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}
|
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|
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// Cleanup any stale sandbox left over due to ungraceful daemon shutdown
|
|
if err := controller.SandboxDestroy(container.ID); err != nil {
|
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logrus.Errorf("failed to cleanup up stale network sandbox for container %s", container.ID)
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}
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|
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if container.Config.NetworkDisabled || container.HostConfig.NetworkMode.IsContainer() {
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return nil
|
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}
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|
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updateSettings := false
|
|
|
|
if len(container.NetworkSettings.Networks) == 0 {
|
|
daemon.updateContainerNetworkSettings(container, nil)
|
|
updateSettings = true
|
|
}
|
|
|
|
// always connect default network first since only default
|
|
// network mode support link and we need do some setting
|
|
// on sandbox initialize for link, but the sandbox only be initialized
|
|
// on first network connecting.
|
|
defaultNetName := runconfig.DefaultDaemonNetworkMode().NetworkName()
|
|
if nConf, ok := container.NetworkSettings.Networks[defaultNetName]; ok {
|
|
cleanOperationalData(nConf)
|
|
if err := daemon.connectToNetwork(container, defaultNetName, nConf.EndpointSettings, updateSettings); err != nil {
|
|
return err
|
|
}
|
|
|
|
}
|
|
|
|
// the intermediate map is necessary because "connectToNetwork" modifies "container.NetworkSettings.Networks"
|
|
networks := make(map[string]*network.EndpointSettings)
|
|
for n, epConf := range container.NetworkSettings.Networks {
|
|
if n == defaultNetName {
|
|
continue
|
|
}
|
|
|
|
networks[n] = epConf
|
|
}
|
|
|
|
for netName, epConf := range networks {
|
|
cleanOperationalData(epConf)
|
|
if err := daemon.connectToNetwork(container, netName, epConf.EndpointSettings, updateSettings); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
|
|
// If the container is not to be connected to any network,
|
|
// create its network sandbox now if not present
|
|
if len(networks) == 0 {
|
|
if nil == daemon.getNetworkSandbox(container) {
|
|
options, err := daemon.buildSandboxOptions(container)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
sb, err := daemon.netController.NewSandbox(container.ID, options...)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
container.UpdateSandboxNetworkSettings(sb)
|
|
defer func() {
|
|
if err != nil {
|
|
sb.Delete()
|
|
}
|
|
}()
|
|
}
|
|
|
|
}
|
|
|
|
if _, err := container.WriteHostConfig(); err != nil {
|
|
return err
|
|
}
|
|
networkActions.WithValues("allocate").UpdateSince(start)
|
|
return nil
|
|
}
|
|
|
|
func (daemon *Daemon) getNetworkSandbox(container *container.Container) libnetwork.Sandbox {
|
|
var sb libnetwork.Sandbox
|
|
daemon.netController.WalkSandboxes(func(s libnetwork.Sandbox) bool {
|
|
if s.ContainerID() == container.ID {
|
|
sb = s
|
|
return true
|
|
}
|
|
return false
|
|
})
|
|
return sb
|
|
}
|
|
|
|
// hasUserDefinedIPAddress returns whether the passed endpoint configuration contains IP address configuration
|
|
func hasUserDefinedIPAddress(epConfig *networktypes.EndpointSettings) bool {
|
|
return epConfig != nil && epConfig.IPAMConfig != nil && (len(epConfig.IPAMConfig.IPv4Address) > 0 || len(epConfig.IPAMConfig.IPv6Address) > 0)
|
|
}
|
|
|
|
// User specified ip address is acceptable only for networks with user specified subnets.
|
|
func validateNetworkingConfig(n libnetwork.Network, epConfig *networktypes.EndpointSettings) error {
|
|
if n == nil || epConfig == nil {
|
|
return nil
|
|
}
|
|
if !hasUserDefinedIPAddress(epConfig) {
|
|
return nil
|
|
}
|
|
_, _, nwIPv4Configs, nwIPv6Configs := n.Info().IpamConfig()
|
|
for _, s := range []struct {
|
|
ipConfigured bool
|
|
subnetConfigs []*libnetwork.IpamConf
|
|
}{
|
|
{
|
|
ipConfigured: len(epConfig.IPAMConfig.IPv4Address) > 0,
|
|
subnetConfigs: nwIPv4Configs,
|
|
},
|
|
{
|
|
ipConfigured: len(epConfig.IPAMConfig.IPv6Address) > 0,
|
|
subnetConfigs: nwIPv6Configs,
|
|
},
|
|
} {
|
|
if s.ipConfigured {
|
|
foundSubnet := false
|
|
for _, cfg := range s.subnetConfigs {
|
|
if len(cfg.PreferredPool) > 0 {
|
|
foundSubnet = true
|
|
break
|
|
}
|
|
}
|
|
if !foundSubnet {
|
|
return runconfig.ErrUnsupportedNetworkNoSubnetAndIP
|
|
}
|
|
}
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
// cleanOperationalData resets the operational data from the passed endpoint settings
|
|
func cleanOperationalData(es *network.EndpointSettings) {
|
|
es.EndpointID = ""
|
|
es.Gateway = ""
|
|
es.IPAddress = ""
|
|
es.IPPrefixLen = 0
|
|
es.IPv6Gateway = ""
|
|
es.GlobalIPv6Address = ""
|
|
es.GlobalIPv6PrefixLen = 0
|
|
es.MacAddress = ""
|
|
if es.IPAMOperational {
|
|
es.IPAMConfig = nil
|
|
}
|
|
}
|
|
|
|
func (daemon *Daemon) updateNetworkConfig(container *container.Container, n libnetwork.Network, endpointConfig *networktypes.EndpointSettings, updateSettings bool) error {
|
|
|
|
if !containertypes.NetworkMode(n.Name()).IsUserDefined() {
|
|
if hasUserDefinedIPAddress(endpointConfig) && !enableIPOnPredefinedNetwork() {
|
|
return runconfig.ErrUnsupportedNetworkAndIP
|
|
}
|
|
if endpointConfig != nil && len(endpointConfig.Aliases) > 0 && !container.EnableServiceDiscoveryOnDefaultNetwork() {
|
|
return runconfig.ErrUnsupportedNetworkAndAlias
|
|
}
|
|
} else {
|
|
addShortID := true
|
|
shortID := stringid.TruncateID(container.ID)
|
|
for _, alias := range endpointConfig.Aliases {
|
|
if alias == shortID {
|
|
addShortID = false
|
|
break
|
|
}
|
|
}
|
|
if addShortID {
|
|
endpointConfig.Aliases = append(endpointConfig.Aliases, shortID)
|
|
}
|
|
}
|
|
|
|
if err := validateNetworkingConfig(n, endpointConfig); err != nil {
|
|
return err
|
|
}
|
|
|
|
if updateSettings {
|
|
if err := daemon.updateNetworkSettings(container, n, endpointConfig); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (daemon *Daemon) connectToNetwork(container *container.Container, idOrName string, endpointConfig *networktypes.EndpointSettings, updateSettings bool) (err error) {
|
|
start := time.Now()
|
|
if container.HostConfig.NetworkMode.IsContainer() {
|
|
return runconfig.ErrConflictSharedNetwork
|
|
}
|
|
if containertypes.NetworkMode(idOrName).IsBridge() &&
|
|
daemon.configStore.DisableBridge {
|
|
container.Config.NetworkDisabled = true
|
|
return nil
|
|
}
|
|
if endpointConfig == nil {
|
|
endpointConfig = &networktypes.EndpointSettings{}
|
|
}
|
|
|
|
n, config, err := daemon.findAndAttachNetwork(container, idOrName, endpointConfig)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
if n == nil {
|
|
return nil
|
|
}
|
|
|
|
var operIPAM bool
|
|
if config != nil {
|
|
if epConfig, ok := config.EndpointsConfig[n.Name()]; ok {
|
|
if endpointConfig.IPAMConfig == nil ||
|
|
(endpointConfig.IPAMConfig.IPv4Address == "" &&
|
|
endpointConfig.IPAMConfig.IPv6Address == "" &&
|
|
len(endpointConfig.IPAMConfig.LinkLocalIPs) == 0) {
|
|
operIPAM = true
|
|
}
|
|
|
|
// copy IPAMConfig and NetworkID from epConfig via AttachNetwork
|
|
endpointConfig.IPAMConfig = epConfig.IPAMConfig
|
|
endpointConfig.NetworkID = epConfig.NetworkID
|
|
}
|
|
}
|
|
|
|
err = daemon.updateNetworkConfig(container, n, endpointConfig, updateSettings)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
controller := daemon.netController
|
|
sb := daemon.getNetworkSandbox(container)
|
|
createOptions, err := container.BuildCreateEndpointOptions(n, endpointConfig, sb, daemon.configStore.DNS)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
endpointName := strings.TrimPrefix(container.Name, "/")
|
|
ep, err := n.CreateEndpoint(endpointName, createOptions...)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
defer func() {
|
|
if err != nil {
|
|
if e := ep.Delete(false); e != nil {
|
|
logrus.Warnf("Could not rollback container connection to network %s", idOrName)
|
|
}
|
|
}
|
|
}()
|
|
container.NetworkSettings.Networks[n.Name()] = &network.EndpointSettings{
|
|
EndpointSettings: endpointConfig,
|
|
IPAMOperational: operIPAM,
|
|
}
|
|
if _, ok := container.NetworkSettings.Networks[n.ID()]; ok {
|
|
delete(container.NetworkSettings.Networks, n.ID())
|
|
}
|
|
|
|
if err := daemon.updateEndpointNetworkSettings(container, n, ep); err != nil {
|
|
return err
|
|
}
|
|
|
|
if sb == nil {
|
|
options, err := daemon.buildSandboxOptions(container)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
sb, err = controller.NewSandbox(container.ID, options...)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
container.UpdateSandboxNetworkSettings(sb)
|
|
}
|
|
|
|
joinOptions, err := container.BuildJoinOptions(n)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
if err := ep.Join(sb, joinOptions...); err != nil {
|
|
return err
|
|
}
|
|
|
|
if !container.Managed {
|
|
// add container name/alias to DNS
|
|
if err := daemon.ActivateContainerServiceBinding(container.Name); err != nil {
|
|
return fmt.Errorf("Activate container service binding for %s failed: %v", container.Name, err)
|
|
}
|
|
}
|
|
|
|
if err := container.UpdateJoinInfo(n, ep); err != nil {
|
|
return fmt.Errorf("Updating join info failed: %v", err)
|
|
}
|
|
|
|
container.NetworkSettings.Ports = getPortMapInfo(sb)
|
|
|
|
daemon.LogNetworkEventWithAttributes(n, "connect", map[string]string{"container": container.ID})
|
|
networkActions.WithValues("connect").UpdateSince(start)
|
|
return nil
|
|
}
|
|
|
|
// ForceEndpointDelete deletes an endpoint from a network forcefully
|
|
func (daemon *Daemon) ForceEndpointDelete(name string, networkName string) error {
|
|
n, err := daemon.FindNetwork(networkName)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
ep, err := n.EndpointByName(name)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
return ep.Delete(true)
|
|
}
|
|
|
|
func (daemon *Daemon) disconnectFromNetwork(container *container.Container, n libnetwork.Network, force bool) error {
|
|
var (
|
|
ep libnetwork.Endpoint
|
|
sbox libnetwork.Sandbox
|
|
)
|
|
|
|
s := func(current libnetwork.Endpoint) bool {
|
|
epInfo := current.Info()
|
|
if epInfo == nil {
|
|
return false
|
|
}
|
|
if sb := epInfo.Sandbox(); sb != nil {
|
|
if sb.ContainerID() == container.ID {
|
|
ep = current
|
|
sbox = sb
|
|
return true
|
|
}
|
|
}
|
|
return false
|
|
}
|
|
n.WalkEndpoints(s)
|
|
|
|
if ep == nil && force {
|
|
epName := strings.TrimPrefix(container.Name, "/")
|
|
ep, err := n.EndpointByName(epName)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
return ep.Delete(force)
|
|
}
|
|
|
|
if ep == nil {
|
|
return fmt.Errorf("container %s is not connected to network %s", container.ID, n.Name())
|
|
}
|
|
|
|
if err := ep.Leave(sbox); err != nil {
|
|
return fmt.Errorf("container %s failed to leave network %s: %v", container.ID, n.Name(), err)
|
|
}
|
|
|
|
container.NetworkSettings.Ports = getPortMapInfo(sbox)
|
|
|
|
if err := ep.Delete(false); err != nil {
|
|
return fmt.Errorf("endpoint delete failed for container %s on network %s: %v", container.ID, n.Name(), err)
|
|
}
|
|
|
|
delete(container.NetworkSettings.Networks, n.Name())
|
|
|
|
daemon.tryDetachContainerFromClusterNetwork(n, container)
|
|
|
|
return nil
|
|
}
|
|
|
|
func (daemon *Daemon) tryDetachContainerFromClusterNetwork(network libnetwork.Network, container *container.Container) {
|
|
if daemon.clusterProvider != nil && network.Info().Dynamic() && !container.Managed {
|
|
if err := daemon.clusterProvider.DetachNetwork(network.Name(), container.ID); err != nil {
|
|
logrus.Warnf("error detaching from network %s: %v", network.Name(), err)
|
|
if err := daemon.clusterProvider.DetachNetwork(network.ID(), container.ID); err != nil {
|
|
logrus.Warnf("error detaching from network %s: %v", network.ID(), err)
|
|
}
|
|
}
|
|
}
|
|
attributes := map[string]string{
|
|
"container": container.ID,
|
|
}
|
|
daemon.LogNetworkEventWithAttributes(network, "disconnect", attributes)
|
|
}
|
|
|
|
func (daemon *Daemon) initializeNetworking(container *container.Container) error {
|
|
var err error
|
|
|
|
if container.HostConfig.NetworkMode.IsContainer() {
|
|
// we need to get the hosts files from the container to join
|
|
nc, err := daemon.getNetworkedContainer(container.ID, container.HostConfig.NetworkMode.ConnectedContainer())
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
err = daemon.initializeNetworkingPaths(container, nc)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
container.Config.Hostname = nc.Config.Hostname
|
|
container.Config.Domainname = nc.Config.Domainname
|
|
return nil
|
|
}
|
|
|
|
if container.HostConfig.NetworkMode.IsHost() {
|
|
if container.Config.Hostname == "" {
|
|
container.Config.Hostname, err = os.Hostname()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
}
|
|
}
|
|
|
|
if err := daemon.allocateNetwork(container); err != nil {
|
|
return err
|
|
}
|
|
|
|
return container.BuildHostnameFile()
|
|
}
|
|
|
|
func (daemon *Daemon) getNetworkedContainer(containerID, connectedContainerID string) (*container.Container, error) {
|
|
nc, err := daemon.GetContainer(connectedContainerID)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
if containerID == nc.ID {
|
|
return nil, fmt.Errorf("cannot join own network")
|
|
}
|
|
if !nc.IsRunning() {
|
|
err := fmt.Errorf("cannot join network of a non running container: %s", connectedContainerID)
|
|
return nil, errdefs.Conflict(err)
|
|
}
|
|
if nc.IsRestarting() {
|
|
return nil, errContainerIsRestarting(connectedContainerID)
|
|
}
|
|
return nc, nil
|
|
}
|
|
|
|
func (daemon *Daemon) releaseNetwork(container *container.Container) {
|
|
start := time.Now()
|
|
if daemon.netController == nil {
|
|
return
|
|
}
|
|
if container.HostConfig.NetworkMode.IsContainer() || container.Config.NetworkDisabled {
|
|
return
|
|
}
|
|
|
|
sid := container.NetworkSettings.SandboxID
|
|
settings := container.NetworkSettings.Networks
|
|
container.NetworkSettings.Ports = nil
|
|
|
|
if sid == "" {
|
|
return
|
|
}
|
|
|
|
var networks []libnetwork.Network
|
|
for n, epSettings := range settings {
|
|
if nw, err := daemon.FindNetwork(getNetworkID(n, epSettings.EndpointSettings)); err == nil {
|
|
networks = append(networks, nw)
|
|
}
|
|
|
|
if epSettings.EndpointSettings == nil {
|
|
continue
|
|
}
|
|
|
|
cleanOperationalData(epSettings)
|
|
}
|
|
|
|
sb, err := daemon.netController.SandboxByID(sid)
|
|
if err != nil {
|
|
logrus.Warnf("error locating sandbox id %s: %v", sid, err)
|
|
return
|
|
}
|
|
if err := sb.DisableService(); err != nil {
|
|
logrus.WithFields(logrus.Fields{"container": container.ID, "sandbox": sid}).WithError(err).Error("Error removing service from sandbox")
|
|
}
|
|
|
|
if err := sb.Delete(); err != nil {
|
|
logrus.Errorf("Error deleting sandbox id %s for container %s: %v", sid, container.ID, err)
|
|
}
|
|
|
|
for _, nw := range networks {
|
|
daemon.tryDetachContainerFromClusterNetwork(nw, container)
|
|
}
|
|
networkActions.WithValues("release").UpdateSince(start)
|
|
}
|
|
|
|
func errRemovalContainer(containerID string) error {
|
|
return fmt.Errorf("Container %s is marked for removal and cannot be connected or disconnected to the network", containerID)
|
|
}
|
|
|
|
// ConnectToNetwork connects a container to a network
|
|
func (daemon *Daemon) ConnectToNetwork(container *container.Container, idOrName string, endpointConfig *networktypes.EndpointSettings) error {
|
|
if endpointConfig == nil {
|
|
endpointConfig = &networktypes.EndpointSettings{}
|
|
}
|
|
container.Lock()
|
|
defer container.Unlock()
|
|
|
|
if !container.Running {
|
|
if container.RemovalInProgress || container.Dead {
|
|
return errRemovalContainer(container.ID)
|
|
}
|
|
|
|
n, err := daemon.FindNetwork(idOrName)
|
|
if err == nil && n != nil {
|
|
if err := daemon.updateNetworkConfig(container, n, endpointConfig, true); err != nil {
|
|
return err
|
|
}
|
|
} else {
|
|
container.NetworkSettings.Networks[idOrName] = &network.EndpointSettings{
|
|
EndpointSettings: endpointConfig,
|
|
}
|
|
}
|
|
} else if !daemon.isNetworkHotPluggable() {
|
|
return fmt.Errorf(runtime.GOOS + " does not support connecting a running container to a network")
|
|
} else {
|
|
if err := daemon.connectToNetwork(container, idOrName, endpointConfig, true); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
|
|
return container.CheckpointTo(daemon.containersReplica)
|
|
}
|
|
|
|
// DisconnectFromNetwork disconnects container from network n.
|
|
func (daemon *Daemon) DisconnectFromNetwork(container *container.Container, networkName string, force bool) error {
|
|
n, err := daemon.FindNetwork(networkName)
|
|
container.Lock()
|
|
defer container.Unlock()
|
|
|
|
if !container.Running || (err != nil && force) {
|
|
if container.RemovalInProgress || container.Dead {
|
|
return errRemovalContainer(container.ID)
|
|
}
|
|
// In case networkName is resolved we will use n.Name()
|
|
// this will cover the case where network id is passed.
|
|
if n != nil {
|
|
networkName = n.Name()
|
|
}
|
|
if _, ok := container.NetworkSettings.Networks[networkName]; !ok {
|
|
return fmt.Errorf("container %s is not connected to the network %s", container.ID, networkName)
|
|
}
|
|
delete(container.NetworkSettings.Networks, networkName)
|
|
} else if err == nil && !daemon.isNetworkHotPluggable() {
|
|
return fmt.Errorf(runtime.GOOS + " does not support connecting a running container to a network")
|
|
} else if err == nil {
|
|
if container.HostConfig.NetworkMode.IsHost() && containertypes.NetworkMode(n.Type()).IsHost() {
|
|
return runconfig.ErrConflictHostNetwork
|
|
}
|
|
|
|
if err := daemon.disconnectFromNetwork(container, n, false); err != nil {
|
|
return err
|
|
}
|
|
} else {
|
|
return err
|
|
}
|
|
|
|
if err := container.CheckpointTo(daemon.containersReplica); err != nil {
|
|
return err
|
|
}
|
|
|
|
if n != nil {
|
|
daemon.LogNetworkEventWithAttributes(n, "disconnect", map[string]string{
|
|
"container": container.ID,
|
|
})
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
// ActivateContainerServiceBinding puts this container into load balancer active rotation and DNS response
|
|
func (daemon *Daemon) ActivateContainerServiceBinding(containerName string) error {
|
|
container, err := daemon.GetContainer(containerName)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
sb := daemon.getNetworkSandbox(container)
|
|
if sb == nil {
|
|
return fmt.Errorf("network sandbox does not exist for container %s", containerName)
|
|
}
|
|
return sb.EnableService()
|
|
}
|
|
|
|
// DeactivateContainerServiceBinding removes this container from load balancer active rotation, and DNS response
|
|
func (daemon *Daemon) DeactivateContainerServiceBinding(containerName string) error {
|
|
container, err := daemon.GetContainer(containerName)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
sb := daemon.getNetworkSandbox(container)
|
|
if sb == nil {
|
|
// If the network sandbox is not found, then there is nothing to deactivate
|
|
logrus.Debugf("Could not find network sandbox for container %s on service binding deactivation request", containerName)
|
|
return nil
|
|
}
|
|
return sb.DisableService()
|
|
}
|
|
|
|
func getNetworkID(name string, endpointSettings *networktypes.EndpointSettings) string {
|
|
// We only want to prefer NetworkID for user defined networks.
|
|
// For systems like bridge, none, etc. the name is preferred (otherwise restart may cause issues)
|
|
if containertypes.NetworkMode(name).IsUserDefined() && endpointSettings != nil && endpointSettings.NetworkID != "" {
|
|
return endpointSettings.NetworkID
|
|
}
|
|
return name
|
|
}
|