aboutsummaryrefslogtreecommitdiff
path: root/cmd/podman/main_local.go
blob: b4f21bd0c7e0bf4feff0c006179f32181c427fbf (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
// +build !remoteclient

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/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() {

	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")
}

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 {
	if os.Geteuid() == 0 || cmd == _searchCommand || cmd == _versionCommand || cmd == _mountCommand || cmd == _migrateCommand || strings.HasPrefix(cmd.Use, "help") {
		return nil
	}
	podmanCmd := cliconfig.PodmanCommand{
		cmd,
		args,
		MainGlobalOpts,
		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 `system migrate` to recreate the pause process")
			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.Shutdown(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)
}