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Prevent connecting to host and prevent disconnecting from host

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Container has private network namespace can not to connect to host
and container with host network can not be disconnected from host.

Signed-off-by: Lei Jitang <leijitang@huawei.com>
This commit is contained in:
Lei Jitang 2015-11-09 10:19:53 +08:00
parent 1eafc7264c
commit a2d8c93fc6
3 changed files with 28 additions and 0 deletions
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8
daemon/container_unix.go
View file

@ -720,6 +720,10 @@ func (daemon *Daemon) updateNetworkSettings(container *Container, n libnetwork.N
container.NetworkSettings = &network.Settings{Networks: make(map[string]*network.EndpointSettings)}
}
if !container.hostConfig.NetworkMode.IsHost() && runconfig.NetworkMode(n.Type()).IsHost() {
return runconfig.ErrConflictHostNetwork
}
for s := range container.NetworkSettings.Networks {
sn, err := daemon.FindNetwork(s)
if err != nil {
@ -1174,6 +1178,10 @@ func (container *Container) DisconnectFromNetwork(n libnetwork.Network) error {
return derr.ErrorCodeNotRunning.WithArgs(container.ID)
}
if container.hostConfig.NetworkMode.IsHost() && runconfig.NetworkMode(n.Type()).IsHost() {
return runconfig.ErrConflictHostNetwork
}
if err := container.disconnectFromNetwork(n); err != nil {
return err
}

18
integration-cli/docker_cli_network_unix_test.go
View file

@ -15,6 +15,7 @@ import (
"github.com/docker/docker/api/types"
"github.com/docker/docker/api/types/versions/v1p20"
"github.com/docker/docker/pkg/integration/checker"
"github.com/docker/docker/runconfig"
"github.com/docker/libnetwork/driverapi"
remoteapi "github.com/docker/libnetwork/drivers/remote/api"
"github.com/docker/libnetwork/ipamapi"
@ -764,3 +765,20 @@ func (s *DockerNetworkSuite) TestDockerNetworkHostModeUngracefulDaemonRestart(c
c.Assert(strings.TrimSpace(runningOut), checker.Equals, "true")
}
}
func (s *DockerNetworkSuite) TestDockerNetworkConnectToHostFromOtherNetwork(c *check.C) {
dockerCmd(c, "run", "-d", "--name", "container1", "busybox", "top")
c.Assert(waitRun("container1"), check.IsNil)
dockerCmd(c, "network", "disconnect", "bridge", "container1")
out, _, err := dockerCmdWithError("network", "connect", "host", "container1")
c.Assert(err, checker.NotNil, check.Commentf(out))
c.Assert(out, checker.Contains, runconfig.ErrConflictHostNetwork.Error())
}
func (s *DockerNetworkSuite) TestDockerNetworkDisconnectFromHost(c *check.C) {
dockerCmd(c, "run", "-d", "--name", "container1", "--net=host", "busybox", "top")
c.Assert(waitRun("container1"), check.IsNil)
out, _, err := dockerCmdWithError("network", "disconnect", "host", "container1")
c.Assert(err, checker.NotNil, check.Commentf("Should err out disconnect from host"))
c.Assert(out, checker.Contains, runconfig.ErrConflictHostNetwork.Error())
}

2
runconfig/parse.go
View file

@ -22,6 +22,8 @@ var (
ErrConflictUserDefinedNetworkAndLinks = fmt.Errorf("Conflicting options: --net=<NETWORK> can't be used with links. This would result in undefined behavior")
// ErrConflictSharedNetwork conflict between private and other networks
ErrConflictSharedNetwork = fmt.Errorf("Container sharing network namespace with another container or host cannot be connected to any other network")
// ErrConflictHostNetwork conflict from being disconnected from host network or connected to host network.
ErrConflictHostNetwork = fmt.Errorf("Container cannot be disconnected from host network or connected to host network")
// ErrConflictNoNetwork conflict between private and other networks
ErrConflictNoNetwork = fmt.Errorf("Container cannot be connected to multiple networks with one of the networks in --none mode")
// ErrConflictNetworkAndDNS conflict between --dns and the network mode