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package main
import (
"context"
"io"
"io/ioutil"
"log/syslog"
"os"
"runtime/pprof"
"strconv"
"strings"
"syscall"
"github.com/containers/libpod/cmd/podman/cliconfig"
"github.com/containers/libpod/cmd/podman/libpodruntime"
"github.com/containers/libpod/libpod"
_ "github.com/containers/libpod/pkg/hooks/0.1.0"
"github.com/containers/libpod/pkg/rootless"
"github.com/containers/libpod/pkg/tracing"
"github.com/containers/libpod/version"
"github.com/containers/storage/pkg/reexec"
"github.com/opentracing/opentracing-go"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
lsyslog "github.com/sirupsen/logrus/hooks/syslog"
"github.com/spf13/cobra"
)
// This is populated by the Makefile from the VERSION file
// in the repository
var (
exitCode = 125
Ctx context.Context
span opentracing.Span
closer io.Closer
)
// Commands that the remote and local client have
// implemented.
var mainCommands = []*cobra.Command{
_buildCommand,
_diffCommand,
_createCommand,
_eventsCommand,
_exportCommand,
_historyCommand,
&_imagesCommand,
_importCommand,
_infoCommand,
&_inspectCommand,
_killCommand,
_loadCommand,
_logsCommand,
podCommand.Command,
_pullCommand,
_pushCommand,
_rmCommand,
&_rmiCommand,
_runCommand,
_saveCommand,
_stopCommand,
_tagCommand,
_umountCommand,
_versionCommand,
_waitCommand,
imageCommand.Command,
systemCommand.Command,
}
var rootCmd = &cobra.Command{
Use: "podman",
Long: "manage pods and images",
RunE: commandRunE(),
PersistentPreRunE: func(cmd *cobra.Command, args []string) error {
return before(cmd, args)
},
PersistentPostRunE: func(cmd *cobra.Command, args []string) error {
return after(cmd, args)
},
SilenceUsage: true,
SilenceErrors: true,
}
var MainGlobalOpts cliconfig.MainFlags
func init() {
cobra.OnInitialize(initConfig)
rootCmd.TraverseChildren = true
rootCmd.Version = version.Version
rootCmd.PersistentFlags().StringVar(&MainGlobalOpts.CGroupManager, "cgroup-manager", "", "Cgroup manager to use (cgroupfs or systemd, default systemd)")
// -c is deprecated due to conflict with -c on subcommands
rootCmd.PersistentFlags().StringVar(&MainGlobalOpts.CpuProfile, "cpu-profile", "", "Path for the cpu profiling results")
rootCmd.PersistentFlags().StringVar(&MainGlobalOpts.Config, "config", "", "Path of a libpod config file detailing container server configuration options")
rootCmd.PersistentFlags().StringVar(&MainGlobalOpts.ConmonPath, "conmon", "", "Path of the conmon binary")
rootCmd.PersistentFlags().StringVar(&MainGlobalOpts.NetworkCmdPath, "network-cmd-path", "", "Path to the command for configuring the network")
rootCmd.PersistentFlags().StringVar(&MainGlobalOpts.CniConfigDir, "cni-config-dir", "", "Path of the configuration directory for CNI networks")
rootCmd.PersistentFlags().StringVar(&MainGlobalOpts.DefaultMountsFile, "default-mounts-file", "", "Path to default mounts file")
rootCmd.PersistentFlags().MarkHidden("defaults-mount-file")
// Override default --help information of `--help` global flag
var dummyHelp bool
rootCmd.PersistentFlags().BoolVar(&dummyHelp, "help", false, "Help for podman")
rootCmd.PersistentFlags().StringSliceVar(&MainGlobalOpts.HooksDir, "hooks-dir", []string{}, "Set the OCI hooks directory path (may be set multiple times)")
rootCmd.PersistentFlags().StringVar(&MainGlobalOpts.LogLevel, "log-level", "error", "Log messages above specified level: debug, info, warn, error, fatal or panic")
rootCmd.PersistentFlags().IntVar(&MainGlobalOpts.MaxWorks, "max-workers", 0, "The maximum number of workers for parallel operations")
rootCmd.PersistentFlags().MarkHidden("max-workers")
rootCmd.PersistentFlags().StringVar(&MainGlobalOpts.Namespace, "namespace", "", "Set the libpod namespace, used to create separate views of the containers and pods on the system")
rootCmd.PersistentFlags().StringVar(&MainGlobalOpts.Root, "root", "", "Path to the root directory in which data, including images, is stored")
rootCmd.PersistentFlags().StringVar(&MainGlobalOpts.Runroot, "runroot", "", "Path to the 'run directory' where all state information is stored")
rootCmd.PersistentFlags().StringVar(&MainGlobalOpts.Runtime, "runtime", "", "Path to the OCI-compatible binary used to run containers, default is /usr/bin/runc")
// -s is depracated due to conflict with -s on subcommands
rootCmd.PersistentFlags().StringVar(&MainGlobalOpts.StorageDriver, "storage-driver", "", "Select which storage driver is used to manage storage of images and containers (default is overlay)")
rootCmd.PersistentFlags().StringSliceVar(&MainGlobalOpts.StorageOpts, "storage-opt", []string{}, "Used to pass an option to the storage driver")
rootCmd.PersistentFlags().BoolVar(&MainGlobalOpts.Syslog, "syslog", false, "Output logging information to syslog as well as the console")
rootCmd.PersistentFlags().StringVar(&MainGlobalOpts.TmpDir, "tmpdir", "", "Path to the tmp directory")
rootCmd.PersistentFlags().BoolVar(&MainGlobalOpts.Trace, "trace", false, "Enable opentracing output")
// Override default --help information of `--version` global flag
var dummyVersion bool
rootCmd.PersistentFlags().BoolVar(&dummyVersion, "version", false, "Version for podman")
rootCmd.AddCommand(mainCommands...)
rootCmd.AddCommand(getMainCommands()...)
}
func initConfig() {
// we can do more stuff in here.
}
func before(cmd *cobra.Command, args []string) error {
if err := libpod.SetXdgRuntimeDir(""); err != nil {
logrus.Errorf(err.Error())
os.Exit(1)
}
if os.Geteuid() != 0 && cmd != _searchCommand && cmd != _versionCommand && !strings.HasPrefix(cmd.Use, "help") {
podmanCmd := cliconfig.PodmanCommand{
cmd,
args,
MainGlobalOpts,
}
runtime, err := libpodruntime.GetRuntime(&podmanCmd)
if err != nil {
return errors.Wrapf(err, "could not get runtime")
}
defer runtime.Shutdown(false)
ctrs, err := runtime.GetRunningContainers()
if err != nil {
logrus.Errorf(err.Error())
os.Exit(1)
}
var became bool
var ret int
if len(ctrs) == 0 {
became, ret, err = rootless.BecomeRootInUserNS()
} else {
for _, ctr := range ctrs {
data, err := ioutil.ReadFile(ctr.Config().ConmonPidFile)
if err != nil {
logrus.Errorf(err.Error())
os.Exit(1)
}
conmonPid, err := strconv.Atoi(string(data))
if err != nil {
logrus.Errorf(err.Error())
os.Exit(1)
}
became, ret, err = rootless.JoinUserAndMountNS(uint(conmonPid))
if err == nil {
break
}
}
}
if err != nil {
logrus.Errorf(err.Error())
os.Exit(1)
}
if became {
os.Exit(ret)
}
}
if MainGlobalOpts.Syslog {
hook, err := lsyslog.NewSyslogHook("", "", syslog.LOG_INFO, "")
if err == nil {
logrus.AddHook(hook)
}
}
// Set log level
level, err := logrus.ParseLevel(MainGlobalOpts.LogLevel)
if err != nil {
return err
}
logrus.SetLevel(level)
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")
}
}
if rootless.IsRootless() {
logrus.Info("running as rootless")
}
// Be sure we can create directories with 0755 mode.
syscall.Umask(0022)
if cmd.Flag("cpu-profile").Changed {
f, err := os.Create(MainGlobalOpts.CpuProfile)
if err != nil {
return errors.Wrapf(err, "unable to create cpu profiling file %s",
MainGlobalOpts.CpuProfile)
}
pprof.StartCPUProfile(f)
}
if cmd.Flag("trace").Changed {
var tracer opentracing.Tracer
tracer, closer = tracing.Init("podman")
opentracing.SetGlobalTracer(tracer)
span = tracer.StartSpan("before-context")
Ctx = opentracing.ContextWithSpan(context.Background(), span)
}
return nil
}
func after(cmd *cobra.Command, args []string) error {
if cmd.Flag("cpu-profile").Changed {
pprof.StopCPUProfile()
}
if cmd.Flag("trace").Changed {
span.Finish()
closer.Close()
}
return nil
}
func main() {
//debug := false
//cpuProfile := false
if reexec.Init() {
return
}
if err := rootCmd.Execute(); err != nil {
outputError(err)
} else {
// The exitCode modified from 125, indicates an application
// running inside of a container failed, as opposed to the
// podman command failed. Must exit with that exit code
// otherwise command exited correctly.
if exitCode == 125 {
exitCode = 0
}
}
// Check if /etc/containers/registries.conf exists when running in
// in a local environment.
CheckForRegistries()
os.Exit(exitCode)
}
|
