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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
-rw-r--r--pkg/netns/netns_linux.go35
-rw-r--r--pkg/spec/createconfig.go2
-rw-r--r--rootless.md1
-rw-r--r--test/e2e/mount_test.go120
8 files changed, 212 insertions, 37 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...)
}
diff --git a/pkg/netns/netns_linux.go b/pkg/netns/netns_linux.go
index 1d6fb873c..a62296549 100644
--- a/pkg/netns/netns_linux.go
+++ b/pkg/netns/netns_linux.go
@@ -23,23 +23,42 @@ import (
"fmt"
"os"
"path"
+ "path/filepath"
"runtime"
"strings"
"sync"
"github.com/containernetworking/plugins/pkg/ns"
+ "github.com/containers/libpod/pkg/rootless"
+ "github.com/containers/libpod/pkg/util"
"github.com/sirupsen/logrus"
"golang.org/x/sys/unix"
)
-const nsRunDir = "/var/run/netns"
+// get NSRunDir returns the dir of where to create the netNS. When running
+// rootless, it needs to be at a location writable by user.
+func getNSRunDir() (string, error) {
+ if rootless.IsRootless() {
+ rootlessDir, err := util.GetRuntimeDir()
+ if err != nil {
+ return "", err
+ }
+ return filepath.Join(rootlessDir, "netns"), nil
+ }
+ return "/var/run/netns", nil
+}
// NewNS creates a new persistent (bind-mounted) network namespace and returns
// an object representing that namespace, without switching to it.
func NewNS() (ns.NetNS, error) {
+ nsRunDir, err := getNSRunDir()
+ if err != nil {
+ return nil, err
+ }
+
b := make([]byte, 16)
- _, err := rand.Reader.Read(b)
+ _, err = rand.Reader.Read(b)
if err != nil {
return nil, fmt.Errorf("failed to generate random netns name: %v", err)
}
@@ -127,14 +146,15 @@ func NewNS() (ns.NetNS, error) {
// Put this thread back to the orig ns, since it might get reused (pre go1.10)
defer func() {
if err := origNS.Set(); err != nil {
- logrus.Errorf("unable to set namespace: %q", err)
+ logrus.Warnf("unable to set namespace: %q", err)
}
}()
// bind mount the netns from the current thread (from /proc) onto the
// mount point. This causes the namespace to persist, even when there
- // are no threads in the ns.
- err = unix.Mount(getCurrentThreadNetNSPath(), nsPath, "none", unix.MS_BIND, "")
+ // are no threads in the ns. Make this a shared mount; it needs to be
+ // back-propogated to the host
+ err = unix.Mount(getCurrentThreadNetNSPath(), nsPath, "none", unix.MS_BIND|unix.MS_SHARED|unix.MS_REC, "")
if err != nil {
err = fmt.Errorf("failed to bind mount ns at %s: %v", nsPath, err)
}
@@ -150,6 +170,11 @@ func NewNS() (ns.NetNS, error) {
// UnmountNS unmounts the NS held by the netns object
func UnmountNS(ns ns.NetNS) error {
+ nsRunDir, err := getNSRunDir()
+ if err != nil {
+ return err
+ }
+
nsPath := ns.Path()
// Only unmount if it's been bind-mounted (don't touch namespaces in /proc...)
if strings.HasPrefix(nsPath, nsRunDir) {
diff --git a/pkg/spec/createconfig.go b/pkg/spec/createconfig.go
index c17172016..7c3195be4 100644
--- a/pkg/spec/createconfig.go
+++ b/pkg/spec/createconfig.go
@@ -275,7 +275,7 @@ func (c *CreateConfig) getContainerCreateOptions(runtime *libpod.Runtime, pod *l
options = append(options, libpod.WithNetNSFrom(connectedCtr))
} else if !c.NetMode.IsHost() && !c.NetMode.IsNone() {
hasUserns := c.UsernsMode.IsContainer() || c.UsernsMode.IsNS() || len(c.IDMappings.UIDMap) > 0 || len(c.IDMappings.GIDMap) > 0
- postConfigureNetNS := c.NetMode.IsSlirp4netns() || (hasUserns && !c.UsernsMode.IsHost())
+ postConfigureNetNS := hasUserns && !c.UsernsMode.IsHost()
options = append(options, libpod.WithNetNS(portBindings, postConfigureNetNS, string(c.NetMode), networks))
}
diff --git a/rootless.md b/rootless.md
index 53463dccc..8cccb86eb 100644
--- a/rootless.md
+++ b/rootless.md
@@ -27,7 +27,6 @@ can easily fail
* Can not use overlayfs driver, but does support fuse-overlayfs
* Ubuntu supports non root overlay, but no other Linux distros do.
* Only other supported driver is VFS.
-* No KATA Container support
* No CNI Support
* CNI wants to modify IPTables, plus other network manipulation that requires CAP_SYS_ADMIN.
* There is potential we could probably do some sort of blacklisting of the relevant plugins, and add a new plugin for rootless networking - slirp4netns as one example and there may be others
diff --git a/test/e2e/mount_test.go b/test/e2e/mount_test.go
index 3197aa655..dda83ba31 100644
--- a/test/e2e/mount_test.go
+++ b/test/e2e/mount_test.go
@@ -156,4 +156,124 @@ var _ = Describe("Podman mount", func() {
umount.WaitWithDefaultTimeout()
Expect(umount.ExitCode()).To(Equal(0))
})
+
+ It("podman list mounted container", func() {
+ setup := podmanTest.Podman([]string{"create", ALPINE, "ls"})
+ setup.WaitWithDefaultTimeout()
+ Expect(setup.ExitCode()).To(Equal(0))
+ cid := setup.OutputToString()
+
+ lmount := podmanTest.Podman([]string{"mount", "--notruncate"})
+ lmount.WaitWithDefaultTimeout()
+ Expect(lmount.ExitCode()).To(Equal(0))
+ Expect(lmount.OutputToString()).To(Equal(""))
+
+ mount := podmanTest.Podman([]string{"mount", cid})
+ mount.WaitWithDefaultTimeout()
+ Expect(mount.ExitCode()).To(Equal(0))
+
+ lmount = podmanTest.Podman([]string{"mount", "--notruncate"})
+ lmount.WaitWithDefaultTimeout()
+ Expect(lmount.ExitCode()).To(Equal(0))
+ Expect(lmount.OutputToString()).To(ContainSubstring(cid))
+
+ umount := podmanTest.Podman([]string{"umount", cid})
+ umount.WaitWithDefaultTimeout()
+ Expect(umount.ExitCode()).To(Equal(0))
+ })
+
+ It("podman list running container", func() {
+ SkipIfRootless()
+
+ setup := podmanTest.Podman([]string{"run", "-dt", ALPINE, "top"})
+ setup.WaitWithDefaultTimeout()
+ Expect(setup.ExitCode()).To(Equal(0))
+ cid := setup.OutputToString()
+
+ lmount := podmanTest.Podman([]string{"mount", "--notruncate"})
+ lmount.WaitWithDefaultTimeout()
+ Expect(lmount.ExitCode()).To(Equal(0))
+ Expect(lmount.OutputToString()).To(ContainSubstring(cid))
+
+ stop := podmanTest.Podman([]string{"stop", cid})
+ stop.WaitWithDefaultTimeout()
+ Expect(stop.ExitCode()).To(Equal(0))
+
+ lmount = podmanTest.Podman([]string{"mount", "--notruncate"})
+ lmount.WaitWithDefaultTimeout()
+ Expect(lmount.ExitCode()).To(Equal(0))
+ Expect(lmount.OutputToString()).To(Equal(""))
+ })
+
+ It("podman list mulitple mounted containers", func() {
+ SkipIfRootless()
+
+ setup := podmanTest.Podman([]string{"create", ALPINE, "ls"})
+ setup.WaitWithDefaultTimeout()
+ Expect(setup.ExitCode()).To(Equal(0))
+ cid1 := setup.OutputToString()
+
+ setup = podmanTest.Podman([]string{"create", ALPINE, "ls"})
+ setup.WaitWithDefaultTimeout()
+ Expect(setup.ExitCode()).To(Equal(0))
+ cid2 := setup.OutputToString()
+
+ setup = podmanTest.Podman([]string{"create", ALPINE, "ls"})
+ setup.WaitWithDefaultTimeout()
+ Expect(setup.ExitCode()).To(Equal(0))
+ cid3 := setup.OutputToString()
+
+ lmount := podmanTest.Podman([]string{"mount", "--notruncate"})
+ lmount.WaitWithDefaultTimeout()
+ Expect(lmount.ExitCode()).To(Equal(0))
+ Expect(lmount.OutputToString()).To(Equal(""))
+
+ mount := podmanTest.Podman([]string{"mount", cid1, cid3})
+ mount.WaitWithDefaultTimeout()
+ Expect(mount.ExitCode()).To(Equal(0))
+
+ lmount = podmanTest.Podman([]string{"mount", "--notruncate"})
+ lmount.WaitWithDefaultTimeout()
+ Expect(lmount.ExitCode()).To(Equal(0))
+ Expect(lmount.OutputToString()).To(ContainSubstring(cid1))
+ Expect(lmount.OutputToString()).ToNot(ContainSubstring(cid2))
+ Expect(lmount.OutputToString()).To(ContainSubstring(cid3))
+
+ umount := podmanTest.Podman([]string{"umount", cid1, cid3})
+ umount.WaitWithDefaultTimeout()
+ Expect(umount.ExitCode()).To(Equal(0))
+
+ lmount = podmanTest.Podman([]string{"mount", "--notruncate"})
+ lmount.WaitWithDefaultTimeout()
+ Expect(lmount.ExitCode()).To(Equal(0))
+ Expect(lmount.OutputToString()).To(Equal(""))
+
+ })
+
+ It("podman list mounted container", func() {
+ SkipIfRootless()
+
+ setup := podmanTest.Podman([]string{"create", ALPINE, "ls"})
+ setup.WaitWithDefaultTimeout()
+ Expect(setup.ExitCode()).To(Equal(0))
+ cid := setup.OutputToString()
+
+ lmount := podmanTest.Podman([]string{"mount", "--notruncate"})
+ lmount.WaitWithDefaultTimeout()
+ Expect(lmount.ExitCode()).To(Equal(0))
+ Expect(lmount.OutputToString()).To(Equal(""))
+
+ mount := podmanTest.Podman([]string{"mount", cid})
+ mount.WaitWithDefaultTimeout()
+ Expect(mount.ExitCode()).To(Equal(0))
+
+ lmount = podmanTest.Podman([]string{"mount", "--notruncate"})
+ lmount.WaitWithDefaultTimeout()
+ Expect(lmount.ExitCode()).To(Equal(0))
+ Expect(lmount.OutputToString()).To(ContainSubstring(cid))
+
+ umount := podmanTest.Podman([]string{"umount", cid})
+ umount.WaitWithDefaultTimeout()
+ Expect(umount.ExitCode()).To(Equal(0))
+ })
})
generated by cgit v1.2.3-54-g00ecf (git 2.39.0) at 2024-11-18 15:08:59 +0000