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-rw-r--r--libpod/container_internal_linux.go14
-rw-r--r--libpod/networking_linux.go62
-rw-r--r--libpod/oci_internal_linux.go11
-rw-r--r--libpod/runtime_pod_infra_linux.go4
4 files changed, 61 insertions, 30 deletions
diff --git a/libpod/container_internal_linux.go b/libpod/container_internal_linux.go
index 230b5b888..e7b4b2b22 100644
--- a/libpod/container_internal_linux.go
+++ b/libpod/container_internal_linux.go
@@ -78,15 +78,21 @@ func (c *Container) prepare() (Err error) {
// Set up network namespace if not already set up
if c.config.CreateNetNS && c.state.NetNS == nil && !c.config.PostConfigureNetNS {
netNS, networkStatus, createNetNSErr = c.runtime.createNetNS(c)
+ if createNetNSErr != nil {
+ return
+ }
tmpStateLock.Lock()
defer tmpStateLock.Unlock()
// Assign NetNS attributes to container
- if createNetNSErr == nil {
- c.state.NetNS = netNS
- c.state.NetworkStatus = networkStatus
- }
+ c.state.NetNS = netNS
+ c.state.NetworkStatus = networkStatus
+ }
+
+ // handle rootless network namespace setup
+ if c.state.NetNS != nil && c.config.NetMode == "slirp4netns" && !c.config.PostConfigureNetNS {
+ createNetNSErr = c.runtime.setupRootlessNetNS(c)
}
}()
// Mount storage if not mounted
diff --git a/libpod/networking_linux.go b/libpod/networking_linux.go
index 67dd0150b..d854a2de6 100644
--- a/libpod/networking_linux.go
+++ b/libpod/networking_linux.go
@@ -90,9 +90,6 @@ func (r *Runtime) configureNetNS(ctr *Container, ctrNS ns.NetNS) ([]*cnitypes.Re
// Create and configure a new network namespace for a container
func (r *Runtime) createNetNS(ctr *Container) (n ns.NetNS, q []*cnitypes.Result, err error) {
- if rootless.IsRootless() {
- return nil, nil, errors.New("cannot configure a new network namespace in rootless mode, only --network=slirp4netns is supported")
- }
ctrNS, err := netns.NewNS()
if err != nil {
return nil, nil, errors.Wrapf(err, "error creating network namespace for container %s", ctr.ID())
@@ -110,7 +107,10 @@ func (r *Runtime) createNetNS(ctr *Container) (n ns.NetNS, q []*cnitypes.Result,
logrus.Debugf("Made network namespace at %s for container %s", ctrNS.Path(), ctr.ID())
- networkStatus, err := r.configureNetNS(ctr, ctrNS)
+ networkStatus := []*cnitypes.Result{}
+ if !rootless.IsRootless() {
+ networkStatus, err = r.configureNetNS(ctr, ctrNS)
+ }
return ctrNS, networkStatus, err
}
@@ -138,9 +138,6 @@ func checkSlirpFlags(path string) (bool, bool, bool, error) {
// Configure the network namespace for a rootless container
func (r *Runtime) setupRootlessNetNS(ctr *Container) (err error) {
- defer errorhandling.CloseQuiet(ctr.rootlessSlirpSyncR)
- defer errorhandling.CloseQuiet(ctr.rootlessSlirpSyncW)
-
path := r.config.NetworkCmdPath
if path == "" {
@@ -164,7 +161,7 @@ func (r *Runtime) setupRootlessNetNS(ctr *Container) (err error) {
cmdArgs := []string{}
if havePortMapping {
- cmdArgs = append(cmdArgs, "--api-socket", apiSocket, fmt.Sprintf("%d", ctr.state.PID))
+ cmdArgs = append(cmdArgs, "--api-socket", apiSocket)
}
dhp, mtu, sandbox, err := checkSlirpFlags(path)
if err != nil {
@@ -179,13 +176,32 @@ func (r *Runtime) setupRootlessNetNS(ctr *Container) (err error) {
if sandbox {
cmdArgs = append(cmdArgs, "--enable-sandbox")
}
- cmdArgs = append(cmdArgs, "-c", "-e", "3", "-r", "4", fmt.Sprintf("%d", ctr.state.PID), "tap0")
- cmd := exec.Command(path, cmdArgs...)
+ // the slirp4netns arguments being passed are describes as follows:
+ // from the slirp4netns documentation: https://github.com/rootless-containers/slirp4netns
+ // -c, --configure Brings up the tap interface
+ // -e, --exit-fd=FD specify the FD for terminating slirp4netns
+ // -r, --ready-fd=FD specify the FD to write to when the initialization steps are finished
+ cmdArgs = append(cmdArgs, "-c", "-e", "3", "-r", "4")
+ if !ctr.config.PostConfigureNetNS {
+ ctr.rootlessSlirpSyncR, ctr.rootlessSlirpSyncW, err = os.Pipe()
+ if err != nil {
+ return errors.Wrapf(err, "failed to create rootless network sync pipe")
+ }
+ cmdArgs = append(cmdArgs, "--netns-type=path", ctr.state.NetNS.Path(), "tap0")
+ } else {
+ defer errorhandling.CloseQuiet(ctr.rootlessSlirpSyncR)
+ defer errorhandling.CloseQuiet(ctr.rootlessSlirpSyncW)
+ cmdArgs = append(cmdArgs, fmt.Sprintf("%d", ctr.state.PID), "tap0")
+ }
+ cmd := exec.Command(path, cmdArgs...)
+ logrus.Debugf("slirp4netns command: %s", strings.Join(cmd.Args, " "))
cmd.SysProcAttr = &syscall.SysProcAttr{
Setpgid: true,
}
+
+ // Leak one end of the pipe in slirp4netns, the other will be sent to conmon
cmd.ExtraFiles = append(cmd.ExtraFiles, ctr.rootlessSlirpSyncR, syncW)
if err := cmd.Start(); err != nil {
@@ -388,20 +404,22 @@ func (r *Runtime) teardownNetNS(ctr *Container) error {
logrus.Debugf("Tearing down network namespace at %s for container %s", ctr.state.NetNS.Path(), ctr.ID())
- var requestedIP net.IP
- if ctr.requestedIP != nil {
- requestedIP = ctr.requestedIP
- // cancel request for a specific IP in case the container is reused later
- ctr.requestedIP = nil
- } else {
- requestedIP = ctr.config.StaticIP
- }
+ // rootless containers do not use the CNI plugin
+ if !rootless.IsRootless() {
+ var requestedIP net.IP
+ if ctr.requestedIP != nil {
+ requestedIP = ctr.requestedIP
+ // cancel request for a specific IP in case the container is reused later
+ ctr.requestedIP = nil
+ } else {
+ requestedIP = ctr.config.StaticIP
+ }
- podNetwork := r.getPodNetwork(ctr.ID(), ctr.Name(), ctr.state.NetNS.Path(), ctr.config.Networks, ctr.config.PortMappings, requestedIP)
+ podNetwork := r.getPodNetwork(ctr.ID(), ctr.Name(), ctr.state.NetNS.Path(), ctr.config.Networks, ctr.config.PortMappings, requestedIP)
- // The network may have already been torn down, so don't fail here, just log
- if err := r.netPlugin.TearDownPod(podNetwork); err != nil {
- return errors.Wrapf(err, "error tearing down CNI namespace configuration for container %s", ctr.ID())
+ if err := r.netPlugin.TearDownPod(podNetwork); err != nil {
+ return errors.Wrapf(err, "error tearing down CNI namespace configuration for container %s", ctr.ID())
+ }
}
// First unmount the namespace
diff --git a/libpod/oci_internal_linux.go b/libpod/oci_internal_linux.go
index a90af32ed..a5cce795b 100644
--- a/libpod/oci_internal_linux.go
+++ b/libpod/oci_internal_linux.go
@@ -131,9 +131,14 @@ func (r *OCIRuntime) createOCIContainer(ctr *Container, restoreOptions *Containe
}
if ctr.config.NetMode.IsSlirp4netns() {
- ctr.rootlessSlirpSyncR, ctr.rootlessSlirpSyncW, err = os.Pipe()
- if err != nil {
- return errors.Wrapf(err, "failed to create rootless network sync pipe")
+ if ctr.config.PostConfigureNetNS {
+ ctr.rootlessSlirpSyncR, ctr.rootlessSlirpSyncW, err = os.Pipe()
+ if err != nil {
+ return errors.Wrapf(err, "failed to create rootless network sync pipe")
+ }
+ } else {
+ defer errorhandling.CloseQuiet(ctr.rootlessSlirpSyncR)
+ defer errorhandling.CloseQuiet(ctr.rootlessSlirpSyncW)
}
// Leak one end in conmon, the other one will be leaked into slirp4netns
cmd.ExtraFiles = append(cmd.ExtraFiles, ctr.rootlessSlirpSyncW)
diff --git a/libpod/runtime_pod_infra_linux.go b/libpod/runtime_pod_infra_linux.go
index ad6662f03..6a27c2800 100644
--- a/libpod/runtime_pod_infra_linux.go
+++ b/libpod/runtime_pod_infra_linux.go
@@ -99,7 +99,9 @@ func (r *Runtime) makeInfraContainer(ctx context.Context, p *Pod, imgName, imgID
if isRootless {
netmode = "slirp4netns"
}
- options = append(options, WithNetNS(p.config.InfraContainer.PortBindings, isRootless, netmode, networks))
+ // PostConfigureNetNS should not be set since user namespace sharing is not implemented
+ // and rootless networking no longer supports post configuration setup
+ options = append(options, WithNetNS(p.config.InfraContainer.PortBindings, false, netmode, networks))
return r.newContainer(ctx, g.Config, options...)
}
generated by cgit v1.2.3-54-g00ecf (git 2.39.0) at 2024-12-28 12:35:51 +0000