270 lines
8.5 KiB
Go
270 lines
8.5 KiB
Go
package main
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import (
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"context"
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"io"
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"io/ioutil"
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"log/syslog"
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"os"
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"runtime/pprof"
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"strconv"
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"strings"
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"syscall"
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"github.com/containers/libpod/cmd/podman/cliconfig"
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"github.com/containers/libpod/cmd/podman/libpodruntime"
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"github.com/containers/libpod/libpod"
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_ "github.com/containers/libpod/pkg/hooks/0.1.0"
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"github.com/containers/libpod/pkg/rootless"
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"github.com/containers/libpod/pkg/tracing"
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"github.com/containers/libpod/version"
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"github.com/containers/storage/pkg/reexec"
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"github.com/opentracing/opentracing-go"
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"github.com/pkg/errors"
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"github.com/sirupsen/logrus"
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lsyslog "github.com/sirupsen/logrus/hooks/syslog"
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"github.com/spf13/cobra"
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)
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// This is populated by the Makefile from the VERSION file
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// in the repository
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var (
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exitCode = 125
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Ctx context.Context
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span opentracing.Span
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closer io.Closer
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)
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// Commands that the remote and local client have
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// implemented.
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var mainCommands = []*cobra.Command{
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_buildCommand,
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_diffCommand,
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_createCommand,
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_eventsCommand,
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_exportCommand,
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_historyCommand,
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&_imagesCommand,
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_importCommand,
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_infoCommand,
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&_inspectCommand,
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_killCommand,
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_loadCommand,
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_logsCommand,
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podCommand.Command,
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&_psCommand,
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_pullCommand,
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_pushCommand,
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&_rmiCommand,
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_runCommand,
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_saveCommand,
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_stopCommand,
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_tagCommand,
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_versionCommand,
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_waitCommand,
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imageCommand.Command,
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systemCommand.Command,
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}
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var rootCmd = &cobra.Command{
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Use: "podman",
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Long: "manage pods and images",
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RunE: commandRunE(),
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PersistentPreRunE: func(cmd *cobra.Command, args []string) error {
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return before(cmd, args)
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},
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PersistentPostRunE: func(cmd *cobra.Command, args []string) error {
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return after(cmd, args)
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},
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SilenceUsage: true,
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SilenceErrors: true,
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}
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var MainGlobalOpts cliconfig.MainFlags
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func init() {
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cobra.OnInitialize(initConfig)
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rootCmd.TraverseChildren = true
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rootCmd.Version = version.Version
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rootCmd.PersistentFlags().StringVar(&MainGlobalOpts.CGroupManager, "cgroup-manager", "", "Cgroup manager to use (cgroupfs or systemd, default systemd)")
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// -c is deprecated due to conflict with -c on subcommands
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rootCmd.PersistentFlags().StringVar(&MainGlobalOpts.CpuProfile, "cpu-profile", "", "Path for the cpu profiling results")
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rootCmd.PersistentFlags().StringVar(&MainGlobalOpts.Config, "config", "", "Path of a libpod config file detailing container server configuration options")
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rootCmd.PersistentFlags().StringVar(&MainGlobalOpts.ConmonPath, "conmon", "", "Path of the conmon binary")
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rootCmd.PersistentFlags().StringVar(&MainGlobalOpts.NetworkCmdPath, "network-cmd-path", "", "Path to the command for configuring the network")
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rootCmd.PersistentFlags().StringVar(&MainGlobalOpts.CniConfigDir, "cni-config-dir", "", "Path of the configuration directory for CNI networks")
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rootCmd.PersistentFlags().StringVar(&MainGlobalOpts.DefaultMountsFile, "default-mounts-file", "", "Path to default mounts file")
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rootCmd.PersistentFlags().MarkHidden("defaults-mount-file")
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// Override default --help information of `--help` global flag
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var dummyHelp bool
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rootCmd.PersistentFlags().BoolVar(&dummyHelp, "help", false, "Help for podman")
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rootCmd.PersistentFlags().StringSliceVar(&MainGlobalOpts.HooksDir, "hooks-dir", []string{}, "Set the OCI hooks directory path (may be set multiple times)")
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rootCmd.PersistentFlags().StringVar(&MainGlobalOpts.LogLevel, "log-level", "error", "Log messages above specified level: debug, info, warn, error, fatal or panic")
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rootCmd.PersistentFlags().IntVar(&MainGlobalOpts.MaxWorks, "max-workers", 0, "The maximum number of workers for parallel operations")
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rootCmd.PersistentFlags().MarkHidden("max-workers")
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rootCmd.PersistentFlags().StringVar(&MainGlobalOpts.Namespace, "namespace", "", "Set the libpod namespace, used to create separate views of the containers and pods on the system")
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rootCmd.PersistentFlags().StringVar(&MainGlobalOpts.Root, "root", "", "Path to the root directory in which data, including images, is stored")
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rootCmd.PersistentFlags().StringVar(&MainGlobalOpts.Runroot, "runroot", "", "Path to the 'run directory' where all state information is stored")
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rootCmd.PersistentFlags().StringVar(&MainGlobalOpts.Runtime, "runtime", "", "Path to the OCI-compatible binary used to run containers, default is /usr/bin/runc")
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// -s is depracated due to conflict with -s on subcommands
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rootCmd.PersistentFlags().StringVar(&MainGlobalOpts.StorageDriver, "storage-driver", "", "Select which storage driver is used to manage storage of images and containers (default is overlay)")
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rootCmd.PersistentFlags().StringSliceVar(&MainGlobalOpts.StorageOpts, "storage-opt", []string{}, "Used to pass an option to the storage driver")
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rootCmd.PersistentFlags().BoolVar(&MainGlobalOpts.Syslog, "syslog", false, "Output logging information to syslog as well as the console")
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rootCmd.PersistentFlags().StringVar(&MainGlobalOpts.TmpDir, "tmpdir", "", "Path to the tmp directory")
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rootCmd.PersistentFlags().BoolVar(&MainGlobalOpts.Trace, "trace", false, "Enable opentracing output")
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// Override default --help information of `--version` global flag
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var dummyVersion bool
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rootCmd.PersistentFlags().BoolVar(&dummyVersion, "version", false, "Version for podman")
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rootCmd.AddCommand(mainCommands...)
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rootCmd.AddCommand(getMainCommands()...)
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}
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func initConfig() {
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// we can do more stuff in here.
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}
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func before(cmd *cobra.Command, args []string) error {
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if err := libpod.SetXdgRuntimeDir(""); err != nil {
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logrus.Errorf(err.Error())
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os.Exit(1)
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}
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if os.Geteuid() != 0 && cmd != _searchCommand && cmd != _versionCommand && !strings.HasPrefix(cmd.Use, "help") {
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podmanCmd := cliconfig.PodmanCommand{
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cmd,
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args,
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MainGlobalOpts,
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}
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runtime, err := libpodruntime.GetRuntime(&podmanCmd)
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if err != nil {
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return errors.Wrapf(err, "could not get runtime")
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}
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defer runtime.Shutdown(false)
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ctrs, err := runtime.GetRunningContainers()
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if err != nil {
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logrus.Errorf(err.Error())
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os.Exit(1)
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}
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var became bool
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var ret int
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if len(ctrs) == 0 {
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became, ret, err = rootless.BecomeRootInUserNS()
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} else {
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for _, ctr := range ctrs {
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data, err := ioutil.ReadFile(ctr.Config().ConmonPidFile)
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if err != nil {
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logrus.Errorf(err.Error())
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os.Exit(1)
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}
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conmonPid, err := strconv.Atoi(string(data))
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if err != nil {
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logrus.Errorf(err.Error())
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os.Exit(1)
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}
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became, ret, err = rootless.JoinUserAndMountNS(uint(conmonPid))
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if err == nil {
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break
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}
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}
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}
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if err != nil {
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logrus.Errorf(err.Error())
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os.Exit(1)
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}
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if became {
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os.Exit(ret)
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}
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}
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if MainGlobalOpts.Syslog {
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hook, err := lsyslog.NewSyslogHook("", "", syslog.LOG_INFO, "")
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if err == nil {
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logrus.AddHook(hook)
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}
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}
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// Set log level
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level, err := logrus.ParseLevel(MainGlobalOpts.LogLevel)
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if err != nil {
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return err
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}
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logrus.SetLevel(level)
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rlimits := new(syscall.Rlimit)
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rlimits.Cur = 1048576
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rlimits.Max = 1048576
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if err := syscall.Setrlimit(syscall.RLIMIT_NOFILE, rlimits); err != nil {
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if err := syscall.Getrlimit(syscall.RLIMIT_NOFILE, rlimits); err != nil {
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return errors.Wrapf(err, "error getting rlimits")
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}
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rlimits.Cur = rlimits.Max
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if err := syscall.Setrlimit(syscall.RLIMIT_NOFILE, rlimits); err != nil {
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return errors.Wrapf(err, "error setting new rlimits")
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}
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}
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if rootless.IsRootless() {
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logrus.Info("running as rootless")
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}
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// Be sure we can create directories with 0755 mode.
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syscall.Umask(0022)
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if cmd.Flag("cpu-profile").Changed {
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f, err := os.Create(MainGlobalOpts.CpuProfile)
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if err != nil {
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return errors.Wrapf(err, "unable to create cpu profiling file %s",
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MainGlobalOpts.CpuProfile)
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}
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pprof.StartCPUProfile(f)
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}
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if cmd.Flag("trace").Changed {
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var tracer opentracing.Tracer
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tracer, closer = tracing.Init("podman")
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opentracing.SetGlobalTracer(tracer)
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span = tracer.StartSpan("before-context")
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Ctx = opentracing.ContextWithSpan(context.Background(), span)
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}
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return nil
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}
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func after(cmd *cobra.Command, args []string) error {
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if cmd.Flag("cpu-profile").Changed {
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pprof.StopCPUProfile()
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}
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if cmd.Flag("trace").Changed {
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span.Finish()
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closer.Close()
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}
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return nil
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}
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func main() {
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//debug := false
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//cpuProfile := false
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if reexec.Init() {
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return
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}
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if err := rootCmd.Execute(); err != nil {
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outputError(err)
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} else {
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// The exitCode modified from 125, indicates an application
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// running inside of a container failed, as opposed to the
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// podman command failed. Must exit with that exit code
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// otherwise command exited correctly.
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if exitCode == 125 {
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exitCode = 0
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}
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}
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// Check if /etc/containers/registries.conf exists when running in
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// in a local environment.
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CheckForRegistries()
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os.Exit(exitCode)
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}
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