diff options
Diffstat (limited to 'libpod/container_internal.go')
| -rw-r--r-- | libpod/container_internal.go | 343 |
1 files changed, 73 insertions, 270 deletions
diff --git a/libpod/container_internal.go b/libpod/container_internal.go index d2f48d661..af17d8495 100644 --- a/libpod/container_internal.go +++ b/libpod/container_internal.go @@ -18,10 +18,7 @@ import ( "github.com/containers/libpod/pkg/ctime" "github.com/containers/libpod/pkg/hooks" "github.com/containers/libpod/pkg/hooks/exec" - "github.com/containers/libpod/pkg/lookup" - "github.com/containers/libpod/pkg/resolvconf" "github.com/containers/libpod/pkg/rootless" - "github.com/containers/libpod/pkg/secrets" "github.com/containers/storage" "github.com/containers/storage/pkg/archive" "github.com/containers/storage/pkg/chrootarchive" @@ -276,6 +273,27 @@ func (c *Container) setupStorage(ctx context.Context) error { }, LabelOpts: c.config.LabelOpts, } + if c.config.Privileged { + privOpt := func(opt string) bool { + for _, privopt := range []string{"nodev", "nosuid", "noexec"} { + if opt == privopt { + return true + } + } + return false + } + defOptions, err := storage.GetDefaultMountOptions() + if err != nil { + return errors.Wrapf(err, "error getting default mount options") + } + var newOptions []string + for _, opt := range defOptions { + if !privOpt(opt) { + newOptions = append(newOptions, opt) + } + } + options.MountOpts = newOptions + } if c.config.Rootfs == "" { options.IDMappingOptions = c.config.IDMappings @@ -583,13 +601,17 @@ func (c *Container) checkDependenciesRunningLocked(depCtrs map[string]*Container } func (c *Container) completeNetworkSetup() error { - if !c.config.PostConfigureNetNS { + netDisabled, err := c.NetworkDisabled() + if err != nil { + return err + } + if !c.config.PostConfigureNetNS || netDisabled { return nil } if err := c.syncContainer(); err != nil { return err } - if rootless.IsRootless() { + if c.config.NetMode == "slirp4netns" { return c.runtime.setupRootlessNetNS(c) } return c.runtime.setupNetNS(c) @@ -597,10 +619,6 @@ func (c *Container) completeNetworkSetup() error { // Initialize a container, creating it in the runtime func (c *Container) init(ctx context.Context) error { - if err := c.makeBindMounts(); err != nil { - return err - } - // Generate the OCI spec spec, err := c.generateSpec(ctx) if err != nil { @@ -613,7 +631,7 @@ func (c *Container) init(ctx context.Context) error { } // With the spec complete, do an OCI create - if err := c.runtime.ociRuntime.createContainer(c, c.config.CgroupParent, false); err != nil { + if err := c.runtime.ociRuntime.createContainer(c, c.config.CgroupParent, nil); err != nil { return err } @@ -828,28 +846,22 @@ func (c *Container) mountStorage() (string, error) { return c.state.Mountpoint, nil } - if !rootless.IsRootless() { - // TODO: generalize this mount code so it will mount every mount in ctr.config.Mounts - mounted, err := mount.Mounted(c.config.ShmDir) - if err != nil { - return "", errors.Wrapf(err, "unable to determine if %q is mounted", c.config.ShmDir) - } + mounted, err := mount.Mounted(c.config.ShmDir) + if err != nil { + return "", errors.Wrapf(err, "unable to determine if %q is mounted", c.config.ShmDir) + } + if !mounted { + shmOptions := fmt.Sprintf("mode=1777,size=%d", c.config.ShmSize) + if err := c.mountSHM(shmOptions); err != nil { + return "", err + } if err := os.Chown(c.config.ShmDir, c.RootUID(), c.RootGID()); err != nil { return "", errors.Wrapf(err, "failed to chown %s", c.config.ShmDir) } - - if !mounted { - shmOptions := fmt.Sprintf("mode=1777,size=%d", c.config.ShmSize) - if err := c.mountSHM(shmOptions); err != nil { - return "", err - } - if err := os.Chown(c.config.ShmDir, c.RootUID(), c.RootGID()); err != nil { - return "", errors.Wrapf(err, "failed to chown %s", c.config.ShmDir) - } - } } + // TODO: generalize this mount code so it will mount every mount in ctr.config.Mounts mountPoint := c.config.Rootfs if mountPoint == "" { mountPoint, err = c.mount() @@ -987,86 +999,6 @@ func (c *Container) postDeleteHooks(ctx context.Context) (err error) { return nil } -// Make standard bind mounts to include in the container -func (c *Container) makeBindMounts() error { - if err := os.Chown(c.state.RunDir, c.RootUID(), c.RootGID()); err != nil { - return errors.Wrapf(err, "cannot chown run directory %s", c.state.RunDir) - } - - if c.state.BindMounts == nil { - c.state.BindMounts = make(map[string]string) - } - - // SHM is always added when we mount the container - c.state.BindMounts["/dev/shm"] = c.config.ShmDir - - // Make /etc/resolv.conf - if _, ok := c.state.BindMounts["/etc/resolv.conf"]; ok { - // If it already exists, delete so we can recreate - delete(c.state.BindMounts, "/etc/resolv.conf") - } - newResolv, err := c.generateResolvConf() - if err != nil { - return errors.Wrapf(err, "error creating resolv.conf for container %s", c.ID()) - } - c.state.BindMounts["/etc/resolv.conf"] = newResolv - - newPasswd, err := c.generatePasswd() - if err != nil { - return errors.Wrapf(err, "error creating temporary passwd file for container %s", c.ID()) - } - if newPasswd != "" { - // Make /etc/passwd - if _, ok := c.state.BindMounts["/etc/passwd"]; ok { - // If it already exists, delete so we can recreate - delete(c.state.BindMounts, "/etc/passwd") - } - logrus.Debugf("adding entry to /etc/passwd for non existent default user") - c.state.BindMounts["/etc/passwd"] = newPasswd - } - // Make /etc/hosts - if _, ok := c.state.BindMounts["/etc/hosts"]; ok { - // If it already exists, delete so we can recreate - delete(c.state.BindMounts, "/etc/hosts") - } - newHosts, err := c.generateHosts() - if err != nil { - return errors.Wrapf(err, "error creating hosts file for container %s", c.ID()) - } - c.state.BindMounts["/etc/hosts"] = newHosts - - // Make /etc/hostname - // This should never change, so no need to recreate if it exists - if _, ok := c.state.BindMounts["/etc/hostname"]; !ok { - hostnamePath, err := c.writeStringToRundir("hostname", c.Hostname()) - if err != nil { - return errors.Wrapf(err, "error creating hostname file for container %s", c.ID()) - } - c.state.BindMounts["/etc/hostname"] = hostnamePath - } - - // Make .containerenv - // Empty file, so no need to recreate if it exists - if _, ok := c.state.BindMounts["/run/.containerenv"]; !ok { - // Empty string for now, but we may consider populating this later - containerenvPath, err := c.writeStringToRundir(".containerenv", "") - if err != nil { - return errors.Wrapf(err, "error creating containerenv file for container %s", c.ID()) - } - c.state.BindMounts["/run/.containerenv"] = containerenvPath - } - - // Add Secret Mounts - secretMounts := secrets.SecretMountsWithUIDGID(c.config.MountLabel, c.state.RunDir, c.runtime.config.DefaultMountsFile, c.state.DestinationRunDir, c.RootUID(), c.RootGID()) - for _, mount := range secretMounts { - if _, ok := c.state.BindMounts[mount.Destination]; !ok { - c.state.BindMounts[mount.Destination] = mount.Source - } - } - - return nil -} - // writeStringToRundir copies the provided file to the runtimedir func (c *Container) writeStringToRundir(destFile, output string) (string, error) { destFileName := filepath.Join(c.state.RunDir, destFile) @@ -1095,146 +1027,7 @@ func (c *Container) writeStringToRundir(destFile, output string) (string, error) return filepath.Join(c.state.DestinationRunDir, destFile), nil } -// generatePasswd generates a container specific passwd file, -// iff g.config.User is a number -func (c *Container) generatePasswd() (string, error) { - var ( - groupspec string - group *user.Group - gid int - ) - if c.config.User == "" { - return "", nil - } - spec := strings.SplitN(c.config.User, ":", 2) - userspec := spec[0] - if len(spec) > 1 { - groupspec = spec[1] - } - // If a non numeric User, then don't generate passwd - uid, err := strconv.ParseUint(userspec, 10, 32) - if err != nil { - return "", nil - } - // Lookup the user to see if it exists in the container image - _, err = lookup.GetUser(c.state.Mountpoint, userspec) - if err != nil && err != user.ErrNoPasswdEntries { - return "", err - } - if err == nil { - return "", nil - } - if groupspec != "" { - if !c.state.Mounted { - return "", errors.Wrapf(ErrCtrStateInvalid, "container %s must be mounted in order to translate group field for passwd record", c.ID()) - } - group, err = lookup.GetGroup(c.state.Mountpoint, groupspec) - if err != nil { - if err == user.ErrNoGroupEntries { - return "", errors.Wrapf(err, "unable to get gid %s from group file", groupspec) - } - return "", err - } - gid = group.Gid - } - originPasswdFile := filepath.Join(c.state.Mountpoint, "/etc/passwd") - orig, err := ioutil.ReadFile(originPasswdFile) - if err != nil && !os.IsNotExist(err) { - return "", errors.Wrapf(err, "unable to read passwd file %s", originPasswdFile) - } - - pwd := fmt.Sprintf("%s%d:x:%d:%d:container user:%s:/bin/sh\n", orig, uid, uid, gid, c.WorkingDir()) - passwdFile, err := c.writeStringToRundir("passwd", pwd) - if err != nil { - return "", errors.Wrapf(err, "failed to create temporary passwd file") - } - if os.Chmod(passwdFile, 0644); err != nil { - return "", err - } - return passwdFile, nil -} - -// generateResolvConf generates a containers resolv.conf -func (c *Container) generateResolvConf() (string, error) { - // Determine the endpoint for resolv.conf in case it is a symlink - resolvPath, err := filepath.EvalSymlinks("/etc/resolv.conf") - if err != nil { - return "", err - } - - contents, err := ioutil.ReadFile(resolvPath) - if err != nil { - return "", errors.Wrapf(err, "unable to read %s", resolvPath) - } - - // Process the file to remove localhost nameservers - // TODO: set ipv6 enable bool more sanely - resolv, err := resolvconf.FilterResolvDNS(contents, true) - if err != nil { - return "", errors.Wrapf(err, "error parsing host resolv.conf") - } - - // Make a new resolv.conf - nameservers := resolvconf.GetNameservers(resolv.Content) - if len(c.config.DNSServer) > 0 { - // We store DNS servers as net.IP, so need to convert to string - nameservers = []string{} - for _, server := range c.config.DNSServer { - nameservers = append(nameservers, server.String()) - } - } - - search := resolvconf.GetSearchDomains(resolv.Content) - if len(c.config.DNSSearch) > 0 { - search = c.config.DNSSearch - } - - options := resolvconf.GetOptions(resolv.Content) - if len(c.config.DNSOption) > 0 { - options = c.config.DNSOption - } - - destPath := filepath.Join(c.state.RunDir, "resolv.conf") - - if err := os.Remove(destPath); err != nil && !os.IsNotExist(err) { - return "", errors.Wrapf(err, "error removing resolv.conf for container %s", c.ID()) - } - - // Build resolv.conf - if _, err = resolvconf.Build(destPath, nameservers, search, options); err != nil { - return "", errors.Wrapf(err, "error building resolv.conf for container %s") - } - - // Relabel resolv.conf for the container - if err := label.Relabel(destPath, c.config.MountLabel, false); err != nil { - return "", err - } - - return filepath.Join(c.state.DestinationRunDir, "resolv.conf"), nil -} - -// generateHosts creates a containers hosts file -func (c *Container) generateHosts() (string, error) { - orig, err := ioutil.ReadFile("/etc/hosts") - if err != nil { - return "", errors.Wrapf(err, "unable to read /etc/hosts") - } - hosts := string(orig) - if len(c.config.HostAdd) > 0 { - for _, host := range c.config.HostAdd { - // the host format has already been verified at this point - fields := strings.SplitN(host, ":", 2) - hosts += fmt.Sprintf("%s %s\n", fields[1], fields[0]) - } - } - if len(c.state.NetworkStatus) > 0 && len(c.state.NetworkStatus[0].IPs) > 0 { - ipAddress := strings.Split(c.state.NetworkStatus[0].IPs[0].Address.String(), "/")[0] - hosts += fmt.Sprintf("%s\t%s\n", ipAddress, c.Hostname()) - } - return c.writeStringToRundir("hosts", hosts) -} - -func (c *Container) addLocalVolumes(ctx context.Context, g *generate.Generator) error { +func (c *Container) addLocalVolumes(ctx context.Context, g *generate.Generator, execUser *user.ExecUser) error { var uid, gid int mountPoint := c.state.Mountpoint if !c.state.Mounted { @@ -1260,12 +1053,8 @@ func (c *Container) addLocalVolumes(ctx context.Context, g *generate.Generator) } if c.config.User != "" { - if !c.state.Mounted { - return errors.Wrapf(ErrCtrStateInvalid, "container %s must be mounted in order to translate User field", c.ID()) - } - execUser, err := lookup.GetUserGroupInfo(c.state.Mountpoint, c.config.User, nil) - if err != nil { - return err + if execUser == nil { + return errors.Wrapf(ErrInternal, "nil pointer passed to addLocalVolumes for execUser") } uid = execUser.Uid gid = execUser.Gid @@ -1379,10 +1168,6 @@ func (c *Container) saveSpec(spec *spec.Spec) error { } func (c *Container) setupOCIHooks(ctx context.Context, config *spec.Spec) (extensionStageHooks map[string][]spec.Hook, err error) { - if len(c.runtime.config.HooksDir) == 0 { - return nil, nil - } - var locale string var ok bool for _, envVar := range []string{ @@ -1410,25 +1195,43 @@ func (c *Container) setupOCIHooks(ctx context.Context, config *spec.Spec) (exten } } - allHooks := make(map[string][]spec.Hook) - for _, hDir := range c.runtime.config.HooksDir { - manager, err := hooks.New(ctx, []string{hDir}, []string{"poststop"}, lang) - if err != nil { - if c.runtime.config.HooksDirNotExistFatal || !os.IsNotExist(err) { - return nil, err - } - logrus.Warnf("failed to load hooks: {}", err) + if c.runtime.config.HooksDir == nil { + if rootless.IsRootless() { return nil, nil } - hooks, err := manager.Hooks(config, c.Spec().Annotations, len(c.config.UserVolumes) > 0) - if err != nil { - return nil, err + allHooks := make(map[string][]spec.Hook) + for _, hDir := range []string{hooks.DefaultDir, hooks.OverrideDir} { + manager, err := hooks.New(ctx, []string{hDir}, []string{"poststop"}, lang) + if err != nil { + if os.IsNotExist(err) { + continue + } + return nil, err + } + hooks, err := manager.Hooks(config, c.Spec().Annotations, len(c.config.UserVolumes) > 0) + if err != nil { + return nil, err + } + if len(hooks) > 0 || config.Hooks != nil { + logrus.Warnf("implicit hook directories are deprecated; set --hooks-dir=%q explicitly to continue to load hooks from this directory", hDir) + } + for i, hook := range hooks { + allHooks[i] = hook + } } - for i, hook := range hooks { - allHooks[i] = hook + return allHooks, nil + } + + manager, err := hooks.New(ctx, c.runtime.config.HooksDir, []string{"poststop"}, lang) + if err != nil { + if os.IsNotExist(err) { + logrus.Warnf("Requested OCI hooks directory %q does not exist", c.runtime.config.HooksDir) + return nil, nil } + return nil, err } - return allHooks, nil + + return manager.Hooks(config, c.Spec().Annotations, len(c.config.UserVolumes) > 0) } // mount mounts the container's root filesystem |