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// +build !remoteclient
// +build linux
package main
import (
"context"
"log/syslog"
"os"
"runtime/pprof"
"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/cgroups"
"github.com/containers/libpod/pkg/rootless"
"github.com/containers/libpod/pkg/tracing"
"github.com/containers/libpod/pkg/util"
"github.com/opentracing/opentracing-go"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
lsyslog "github.com/sirupsen/logrus/hooks/syslog"
"github.com/spf13/cobra"
)
const remote = false
func init() {
cgroupManager := libpod.SystemdCgroupsManager
if runtimeConfig, err := libpod.DefaultRuntimeConfig(); err == nil {
cgroupManager = runtimeConfig.CgroupManager
}
cgroupHelp := "Cgroup manager to use (cgroupfs or systemd)"
cgroupv2, _ := cgroups.IsCgroup2UnifiedMode()
if rootless.IsRootless() && !cgroupv2 {
cgroupManager = ""
cgroupHelp = "Cgroup manager is not supported in rootless mode"
}
rootCmd.PersistentFlags().StringVar(&MainGlobalOpts.CGroupManager, "cgroup-manager", cgroupManager, cgroupHelp)
// -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")
if err := rootCmd.PersistentFlags().MarkHidden("default-mounts-file"); err != nil {
logrus.Error("unable to mark default-mounts-file flag as hidden")
}
rootCmd.PersistentFlags().StringVar(&MainGlobalOpts.EventsBackend, "events-backend", "", "Events backend to use")
// 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")
if err := rootCmd.PersistentFlags().MarkHidden("max-workers"); err != nil {
logrus.Error("unable to mark max-workers flag as hidden")
}
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().StringArrayVar(&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")
}
func setSyslog() error {
if MainGlobalOpts.Syslog {
hook, err := lsyslog.NewSyslogHook("", "", syslog.LOG_INFO, "")
if err == nil {
logrus.AddHook(hook)
return nil
}
return err
}
return nil
}
func profileOn(cmd *cobra.Command) error {
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)
}
if err := pprof.StartCPUProfile(f); err != nil {
return err
}
}
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 profileOff(cmd *cobra.Command) error {
if cmd.Flag("cpu-profile").Changed {
pprof.StopCPUProfile()
}
if cmd.Flag("trace").Changed {
span.Finish()
closer.Close()
}
return nil
}
func setupRootless(cmd *cobra.Command, args []string) error {
matches, err := rootless.ConfigurationMatches()
if err != nil {
return err
}
if !matches {
logrus.Warningf("the current user namespace doesn't match the configuration in /etc/subuid or /etc/subgid")
logrus.Warningf("you can use `%s system migrate` to recreate the user namespace and restart the containers", os.Args[0])
}
if os.Geteuid() == 0 || cmd == _searchCommand || cmd == _versionCommand || cmd == _mountCommand || cmd == _migrateCommand || strings.HasPrefix(cmd.Use, "help") {
return nil
}
podmanCmd := cliconfig.PodmanCommand{
Command: cmd,
InputArgs: args,
GlobalFlags: MainGlobalOpts,
Remote: remoteclient,
}
pausePidPath, err := util.GetRootlessPauseProcessPidPath()
if err != nil {
return errors.Wrapf(err, "could not get pause process pid file path")
}
if _, err := os.Stat(pausePidPath); err == nil {
became, ret, err := rootless.TryJoinFromFilePaths("", false, []string{pausePidPath})
if err != nil {
logrus.Errorf("cannot join pause process. You may need to remove %s and stop all containers", pausePidPath)
logrus.Errorf("you can use `%s system migrate` to recreate the pause process and restart the containers", os.Args[0])
logrus.Errorf(err.Error())
os.Exit(1)
}
if became {
os.Exit(ret)
}
}
// if there is no pid file, try to join existing containers, and create a pause process.
runtime, err := libpodruntime.GetRuntime(getContext(), &podmanCmd)
if err != nil {
return errors.Wrapf(err, "could not get runtime")
}
defer runtime.DeferredShutdown(false)
ctrs, err := runtime.GetRunningContainers()
if err != nil {
logrus.Errorf(err.Error())
os.Exit(1)
}
paths := []string{}
for _, ctr := range ctrs {
paths = append(paths, ctr.Config().ConmonPidFile)
}
became, ret, err := rootless.TryJoinFromFilePaths(pausePidPath, true, paths)
if err != nil {
logrus.Errorf(err.Error())
os.Exit(1)
}
if became {
os.Exit(ret)
}
return nil
}
func setRLimits() error {
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() {
// Be sure we can create directories with 0755 mode.
syscall.Umask(0022)
}
|
