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|
// +build ABISupport
package abi
import (
"context"
"fmt"
"io/ioutil"
"net"
"os"
"strconv"
"strings"
"syscall"
"github.com/containers/common/pkg/config"
"github.com/containers/libpod/libpod/define"
api "github.com/containers/libpod/pkg/api/server"
"github.com/containers/libpod/pkg/cgroups"
"github.com/containers/libpod/pkg/domain/entities"
"github.com/containers/libpod/pkg/rootless"
"github.com/containers/libpod/pkg/util"
iopodman "github.com/containers/libpod/pkg/varlink"
iopodmanAPI "github.com/containers/libpod/pkg/varlinkapi"
"github.com/containers/libpod/utils"
"github.com/containers/libpod/version"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
"github.com/spf13/cobra"
"github.com/varlink/go/varlink"
)
func (ic *ContainerEngine) Info(ctx context.Context) (*define.Info, error) {
return ic.Libpod.Info()
}
func (ic *ContainerEngine) RestService(_ context.Context, opts entities.ServiceOptions) error {
var (
listener net.Listener
err error
)
if opts.URI != "" {
fields := strings.Split(opts.URI, ":")
if len(fields) == 1 {
return errors.Errorf("%s is an invalid socket destination", opts.URI)
}
address := strings.Join(fields[1:], ":")
listener, err = net.Listen(fields[0], address)
if err != nil {
return errors.Wrapf(err, "unable to create socket %s", opts.URI)
}
}
server, err := api.NewServerWithSettings(ic.Libpod, opts.Timeout, &listener)
if err != nil {
return err
}
defer func() {
if err := server.Shutdown(); err != nil {
logrus.Warnf("Error when stopping API service: %s", err)
}
}()
err = server.Serve()
_ = listener.Close()
return err
}
func (ic *ContainerEngine) VarlinkService(_ context.Context, opts entities.ServiceOptions) error {
var varlinkInterfaces = []*iopodman.VarlinkInterface{
iopodmanAPI.New(opts.Command, ic.Libpod),
}
service, err := varlink.NewService(
"Atomic",
"podman",
version.Version,
"https://github.com/containers/libpod",
)
if err != nil {
return errors.Wrapf(err, "unable to create new varlink service")
}
for _, i := range varlinkInterfaces {
if err := service.RegisterInterface(i); err != nil {
return errors.Errorf("unable to register varlink interface %v", i)
}
}
// Run the varlink server at the given address
if err = service.Listen(opts.URI, opts.Timeout); err != nil {
switch err.(type) {
case varlink.ServiceTimeoutError:
logrus.Infof("varlink service expired (use --timeout to increase session time beyond %s ms, 0 means never timeout)", opts.Timeout.String())
return nil
default:
return errors.Wrapf(err, "unable to start varlink service")
}
}
return nil
}
func (ic *ContainerEngine) SetupRootless(cmd *cobra.Command) error {
// do it only after podman has already re-execed and running with uid==0.
if os.Geteuid() == 0 {
ownsCgroup, err := cgroups.UserOwnsCurrentSystemdCgroup()
if err != nil {
logrus.Warnf("Failed to detect the owner for the current cgroup: %v", err)
}
if !ownsCgroup {
conf, err := ic.Config(context.Background())
if err != nil {
return err
}
unitName := fmt.Sprintf("podman-%d.scope", os.Getpid())
if err := utils.RunUnderSystemdScope(os.Getpid(), "user.slice", unitName); err != nil {
if conf.Engine.CgroupManager == config.SystemdCgroupsManager {
logrus.Warnf("Failed to add podman to systemd sandbox cgroup: %v", err)
} else {
logrus.Debugf("Failed to add podman to systemd sandbox cgroup: %v", err)
}
}
}
}
if !executeCommandInUserNS(cmd) {
return nil
}
pausePidPath, err := util.GetRootlessPauseProcessPidPath()
if err != nil {
return errors.Wrapf(err, "could not get pause process pid file path")
}
became, ret, err := rootless.TryJoinPauseProcess(pausePidPath)
if err != nil {
return err
}
if became {
os.Exit(ret)
}
// if there is no pid file, try to join existing containers, and create a pause process.
ctrs, err := ic.Libpod.GetRunningContainers()
if err != nil {
logrus.WithError(err).Fatal("")
}
paths := []string{}
for _, ctr := range ctrs {
paths = append(paths, ctr.Config().ConmonPidFile)
}
became, ret, err = rootless.TryJoinFromFilePaths(pausePidPath, true, paths)
if err := movePauseProcessToScope(); err != nil {
conf, err := ic.Config(context.Background())
if err != nil {
return err
}
if conf.Engine.CgroupManager == config.SystemdCgroupsManager {
logrus.Warnf("Failed to add pause process to systemd sandbox cgroup: %v", err)
} else {
logrus.Debugf("Failed to add pause process to systemd sandbox cgroup: %v", err)
}
}
if err != nil {
logrus.WithError(err).Fatal("")
}
if became {
os.Exit(ret)
}
return nil
}
// Most podman commands when run in rootless mode, need to be executed in the
// users usernamespace. This function is updated with a list of commands that
// should NOT be run within the user namespace.
func executeCommandInUserNS(cmd *cobra.Command) bool {
return os.Geteuid() == 0
// if os.Geteuid() == 0 {
// return false
// }
// switch cmd {
// case _migrateCommand,
// _mountCommand,
// _renumberCommand,
// _searchCommand,
// _versionCommand:
// return false
// }
// return true
}
func movePauseProcessToScope() error {
pausePidPath, err := util.GetRootlessPauseProcessPidPath()
if err != nil {
return errors.Wrapf(err, "could not get pause process pid file path")
}
data, err := ioutil.ReadFile(pausePidPath)
if err != nil {
return errors.Wrapf(err, "cannot read pause pid file")
}
pid, err := strconv.ParseUint(string(data), 10, 0)
if err != nil {
return errors.Wrapf(err, "cannot parse pid file %s", pausePidPath)
}
return utils.RunUnderSystemdScope(int(pid), "user.slice", "podman-pause.scope")
}
func setRLimits() error { // nolint:deadcode,unused
rlimits := new(syscall.Rlimit)
rlimits.Cur = 1048576
rlimits.Max = 1048576
if err := syscall.Setrlimit(syscall.RLIMIT_NOFILE, rlimits); err != nil {
if err := syscall.Getrlimit(syscall.RLIMIT_NOFILE, rlimits); err != nil {
return errors.Wrapf(err, "error getting rlimits")
}
rlimits.Cur = rlimits.Max
if err := syscall.Setrlimit(syscall.RLIMIT_NOFILE, rlimits); err != nil {
return errors.Wrapf(err, "error setting new rlimits")
}
}
return nil
}
func setUMask() { // nolint:deadcode,unused
// Be sure we can create directories with 0755 mode.
syscall.Umask(0022)
}
// checkInput can be used to verify any of the globalopt values
func checkInput() error { // nolint:deadcode,unused
return nil
}
// func getCNIPluginsDir() string {
// if rootless.IsRootless() {
// return ""
// }
//
// return registry.PodmanOptions.Network.CNIPluginDirs[0]
// }
|
