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|
package main
import (
"context"
"encoding/json"
"fmt"
"os"
"strconv"
"strings"
"syscall"
"github.com/docker/docker/api/types/container"
"github.com/docker/docker/pkg/signal"
"github.com/docker/go-connections/nat"
"github.com/docker/go-units"
"github.com/opencontainers/selinux/go-selinux/label"
"github.com/pkg/errors"
"github.com/projectatomic/libpod/cmd/podman/libpodruntime"
"github.com/projectatomic/libpod/libpod"
"github.com/projectatomic/libpod/libpod/image"
ann "github.com/projectatomic/libpod/pkg/annotations"
"github.com/projectatomic/libpod/pkg/apparmor"
"github.com/projectatomic/libpod/pkg/inspect"
cc "github.com/projectatomic/libpod/pkg/spec"
"github.com/projectatomic/libpod/pkg/util"
libpodVersion "github.com/projectatomic/libpod/version"
"github.com/sirupsen/logrus"
"github.com/urfave/cli"
)
var (
defaultEnvVariables = map[string]string{
"PATH": "/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",
"TERM": "xterm",
}
)
var createDescription = "Creates a new container from the given image or" +
" storage and prepares it for running the specified command. The" +
" container ID is then printed to stdout. You can then start it at" +
" any time with the podman start <container_id> command. The container" +
" will be created with the initial state 'created'."
var createCommand = cli.Command{
Name: "create",
Usage: "create but do not start a container",
Description: createDescription,
Flags: createFlags,
Action: createCmd,
ArgsUsage: "IMAGE [COMMAND [ARG...]]",
SkipArgReorder: true,
UseShortOptionHandling: true,
}
func createCmd(c *cli.Context) error {
// TODO should allow user to create based off a directory on the host not just image
// Need CLI support for this
if err := validateFlags(c, createFlags); err != nil {
return err
}
if c.String("cidfile") != "" {
if _, err := os.Stat(c.String("cidfile")); err == nil {
return errors.Errorf("container id file exists. ensure another container is not using it or delete %s", c.String("cidfile"))
}
if err := libpod.WriteFile("", c.String("cidfile")); err != nil {
return errors.Wrapf(err, "unable to write cidfile %s", c.String("cidfile"))
}
}
if len(c.Args()) < 1 {
return errors.Errorf("image name or ID is required")
}
rootfs := ""
if c.Bool("rootfs") {
rootfs = c.Args()[0]
}
mappings, err := util.ParseIDMapping(c.StringSlice("uidmap"), c.StringSlice("gidmap"), c.String("subuidmap"), c.String("subgidmap"))
if err != nil {
return err
}
storageOpts, err := libpodruntime.GetDefaultStoreOptions()
if err != nil {
return err
}
storageOpts.UIDMap = mappings.UIDMap
storageOpts.GIDMap = mappings.GIDMap
runtime, err := libpodruntime.GetRuntimeWithStorageOpts(c, &storageOpts)
if err != nil {
return errors.Wrapf(err, "error creating libpod runtime")
}
defer runtime.Shutdown(false)
rtc := runtime.GetConfig()
ctx := getContext()
imageName := ""
var data *inspect.ImageData = nil
if rootfs == "" {
newImage, err := runtime.ImageRuntime().New(ctx, c.Args()[0], rtc.SignaturePolicyPath, "", os.Stderr, nil, image.SigningOptions{}, false, false)
if err != nil {
return err
}
data, err = newImage.Inspect(ctx)
imageName = newImage.Names()[0]
}
createConfig, err := parseCreateOpts(ctx, c, runtime, imageName, data)
if err != nil {
return err
}
runtimeSpec, err := cc.CreateConfigToOCISpec(createConfig)
if err != nil {
return err
}
options, err := createConfig.GetContainerCreateOptions(runtime)
if err != nil {
return err
}
ctr, err := runtime.NewContainer(ctx, runtimeSpec, options...)
if err != nil {
return err
}
createConfigJSON, err := json.Marshal(createConfig)
if err != nil {
return err
}
if err := ctr.AddArtifact("create-config", createConfigJSON); err != nil {
return err
}
logrus.Debug("new container created ", ctr.ID())
if c.String("cidfile") != "" {
err := libpod.WriteFile(ctr.ID(), c.String("cidfile"))
if err != nil {
logrus.Error(err)
}
}
fmt.Printf("%s\n", ctr.ID())
return nil
}
func parseSecurityOpt(config *cc.CreateConfig, securityOpts []string) error {
var (
labelOpts []string
err error
)
if config.PidMode.IsHost() {
labelOpts = append(labelOpts, label.DisableSecOpt()...)
} else if config.PidMode.IsContainer() {
ctr, err := config.Runtime.LookupContainer(config.PidMode.Container())
if err != nil {
return errors.Wrapf(err, "container %q not found", config.PidMode.Container())
}
labelOpts = append(labelOpts, label.DupSecOpt(ctr.ProcessLabel())...)
}
if config.IpcMode.IsHost() {
labelOpts = append(labelOpts, label.DisableSecOpt()...)
} else if config.IpcMode.IsContainer() {
ctr, err := config.Runtime.LookupContainer(config.IpcMode.Container())
if err != nil {
return errors.Wrapf(err, "container %q not found", config.IpcMode.Container())
}
labelOpts = append(labelOpts, label.DupSecOpt(ctr.ProcessLabel())...)
}
for _, opt := range securityOpts {
if opt == "no-new-privileges" {
config.NoNewPrivs = true
} else {
con := strings.SplitN(opt, "=", 2)
if len(con) != 2 {
return fmt.Errorf("Invalid --security-opt 1: %q", opt)
}
switch con[0] {
case "label":
labelOpts = append(labelOpts, con[1])
case "apparmor":
config.ApparmorProfile = con[1]
case "seccomp":
config.SeccompProfilePath = con[1]
default:
return fmt.Errorf("Invalid --security-opt 2: %q", opt)
}
}
}
if config.ApparmorProfile == "" && apparmor.IsEnabled() {
// Unless specified otherwise, make sure that the default AppArmor
// profile is installed. To avoid redundantly loading the profile
// on each invocation, check if it's loaded before installing it.
// Suffix the profile with the current libpod version to allow
// loading the new, potentially updated profile after an update.
profile := fmt.Sprintf("%s-%s", apparmor.DefaultLibpodProfile, libpodVersion.Version)
loadProfile := func() error {
isLoaded, err := apparmor.IsLoaded(profile)
if err != nil {
return err
}
if !isLoaded {
err = apparmor.InstallDefault(profile)
if err != nil {
return err
}
}
return nil
}
if err := loadProfile(); err != nil {
switch err {
case apparmor.ErrApparmorUnsupported:
// do not set the profile when AppArmor isn't supported
logrus.Debugf("AppArmor is not supported: setting empty profile")
default:
return err
}
} else {
logrus.Infof("Sucessfully loaded AppAmor profile '%s'", profile)
config.ApparmorProfile = profile
}
} else if config.ApparmorProfile != "" {
if !apparmor.IsEnabled() {
return fmt.Errorf("profile specified but AppArmor is disabled on the host")
}
isLoaded, err := apparmor.IsLoaded(config.ApparmorProfile)
if err != nil {
switch err {
case apparmor.ErrApparmorUnsupported:
return fmt.Errorf("profile specified but AppArmor is not supported")
default:
return fmt.Errorf("error checking if AppArmor profile is loaded: %v", err)
}
}
if !isLoaded {
return fmt.Errorf("specified AppArmor profile '%s' is not loaded", config.ApparmorProfile)
}
}
if config.SeccompProfilePath == "" {
if _, err := os.Stat(libpod.SeccompOverridePath); err == nil {
config.SeccompProfilePath = libpod.SeccompOverridePath
} else {
if !os.IsNotExist(err) {
return errors.Wrapf(err, "can't check if %q exists", libpod.SeccompOverridePath)
}
if _, err := os.Stat(libpod.SeccompDefaultPath); err != nil {
if !os.IsNotExist(err) {
return errors.Wrapf(err, "can't check if %q exists", libpod.SeccompDefaultPath)
}
} else {
config.SeccompProfilePath = libpod.SeccompDefaultPath
}
}
}
config.ProcessLabel, config.MountLabel, err = label.InitLabels(labelOpts)
return err
}
// isPortInPortBindings determines if an exposed host port is in user
// provided ports
func isPortInPortBindings(pb map[nat.Port][]nat.PortBinding, port nat.Port) bool {
var hostPorts []string
for _, i := range pb {
hostPorts = append(hostPorts, i[0].HostPort)
}
return util.StringInSlice(port.Port(), hostPorts)
}
// isPortInImagePorts determines if an exposed host port was given to us by metadata
// in the image itself
func isPortInImagePorts(exposedPorts map[string]struct{}, port string) bool {
for i := range exposedPorts {
fields := strings.Split(i, "/")
if port == fields[0] {
return true
}
}
return false
}
// Parses CLI options related to container creation into a config which can be
// parsed into an OCI runtime spec
func parseCreateOpts(ctx context.Context, c *cli.Context, runtime *libpod.Runtime, imageName string, data *inspect.ImageData) (*cc.CreateConfig, error) {
var (
inputCommand, command []string
memoryLimit, memoryReservation, memorySwap, memoryKernel int64
blkioWeight uint16
)
idmappings, err := util.ParseIDMapping(c.StringSlice("uidmap"), c.StringSlice("gidmap"), c.String("subuidname"), c.String("subgidname"))
if err != nil {
return nil, err
}
if c.String("mac-address") != "" {
return nil, errors.Errorf("--mac-address option not currently supported")
}
imageID := ""
inputCommand = c.Args()[1:]
if data != nil {
imageID = data.ID
}
rootfs := ""
if c.Bool("rootfs") {
rootfs = c.Args()[0]
}
sysctl, err := validateSysctl(c.StringSlice("sysctl"))
if err != nil {
return nil, errors.Wrapf(err, "invalid value for sysctl")
}
if c.String("memory") != "" {
memoryLimit, err = units.RAMInBytes(c.String("memory"))
if err != nil {
return nil, errors.Wrapf(err, "invalid value for memory")
}
}
if c.String("memory-reservation") != "" {
memoryReservation, err = units.RAMInBytes(c.String("memory-reservation"))
if err != nil {
return nil, errors.Wrapf(err, "invalid value for memory-reservation")
}
}
if c.String("memory-swap") != "" {
memorySwap, err = units.RAMInBytes(c.String("memory-swap"))
if err != nil {
return nil, errors.Wrapf(err, "invalid value for memory-swap")
}
}
if c.String("kernel-memory") != "" {
memoryKernel, err = units.RAMInBytes(c.String("kernel-memory"))
if err != nil {
return nil, errors.Wrapf(err, "invalid value for kernel-memory")
}
}
if c.String("blkio-weight") != "" {
u, err := strconv.ParseUint(c.String("blkio-weight"), 10, 16)
if err != nil {
return nil, errors.Wrapf(err, "invalid value for blkio-weight")
}
blkioWeight = uint16(u)
}
if err = parseVolumes(c.StringSlice("volume")); err != nil {
return nil, err
}
if err = parseVolumesFrom(c.StringSlice("volumes-from")); err != nil {
return nil, err
}
tty := c.Bool("tty")
pidMode := container.PidMode(c.String("pid"))
if !cc.IsNS(string(pidMode)) && !pidMode.Valid() {
return nil, errors.Errorf("--pid %q is not valid", c.String("pid"))
}
usernsMode := container.UsernsMode(c.String("userns"))
if !cc.IsNS(string(usernsMode)) && !usernsMode.Valid() {
return nil, errors.Errorf("--userns %q is not valid", c.String("userns"))
}
if c.Bool("detach") && c.Bool("rm") {
return nil, errors.Errorf("--rm and --detach can not be specified together")
}
if c.Int64("cpu-period") != 0 && c.Float64("cpus") > 0 {
return nil, errors.Errorf("--cpu-period and --cpus cannot be set together")
}
if c.Int64("cpu-quota") != 0 && c.Float64("cpus") > 0 {
return nil, errors.Errorf("--cpu-quota and --cpus cannot be set together")
}
utsMode := container.UTSMode(c.String("uts"))
if !cc.IsNS(string(utsMode)) && !utsMode.Valid() {
return nil, errors.Errorf("--uts %q is not valid", c.String("uts"))
}
ipcMode := container.IpcMode(c.String("ipc"))
if !ipcMode.Valid() {
return nil, errors.Errorf("--ipc %q is not valid", ipcMode)
}
shmDir := ""
if ipcMode.IsHost() {
shmDir = "/dev/shm"
} else if ipcMode.IsContainer() {
ctr, err := runtime.LookupContainer(ipcMode.Container())
if err != nil {
return nil, errors.Wrapf(err, "container %q not found", ipcMode.Container())
}
shmDir = ctr.ShmDir()
}
// USER
user := c.String("user")
if user == "" {
if data == nil {
user = "0"
} else {
user = data.ContainerConfig.User
}
}
// STOP SIGNAL
stopSignal := syscall.SIGTERM
signalString := "SIGTERM"
if data != nil {
signalString = data.ContainerConfig.StopSignal
}
if c.IsSet("stop-signal") {
signalString = c.String("stop-signal")
}
if signalString != "" {
stopSignal, err = signal.ParseSignal(signalString)
if err != nil {
return nil, err
}
}
// ENVIRONMENT VARIABLES
env := defaultEnvVariables
if data != nil {
for _, e := range data.ContainerConfig.Env {
split := strings.SplitN(e, "=", 2)
if len(split) > 1 {
env[split[0]] = split[1]
} else {
env[split[0]] = ""
}
}
}
if err := readKVStrings(env, c.StringSlice("env-file"), c.StringSlice("env")); err != nil {
return nil, errors.Wrapf(err, "unable to process environment variables")
}
// LABEL VARIABLES
labels, err := getAllLabels(c.StringSlice("label-file"), c.StringSlice("label"))
if err != nil {
return nil, errors.Wrapf(err, "unable to process labels")
}
if data != nil {
for key, val := range data.ContainerConfig.Labels {
if _, ok := labels[key]; !ok {
labels[key] = val
}
}
}
// ANNOTATIONS
annotations := make(map[string]string)
// First, add our default annotations
annotations[ann.ContainerType] = "sandbox"
annotations[ann.TTY] = "false"
if tty {
annotations[ann.TTY] = "true"
}
if data != nil {
// Next, add annotations from the image
for key, value := range data.Annotations {
annotations[key] = value
}
}
// Last, add user annotations
for _, annotation := range c.StringSlice("annotation") {
splitAnnotation := strings.SplitN(annotation, "=", 2)
if len(splitAnnotation) < 2 {
return nil, errors.Errorf("Annotations must be formatted KEY=VALUE")
}
annotations[splitAnnotation[0]] = splitAnnotation[1]
}
// WORKING DIRECTORY
workDir := "/"
if c.IsSet("workdir") || c.IsSet("w") {
workDir = c.String("workdir")
} else if data != nil && data.ContainerConfig.WorkingDir != "" {
workDir = data.ContainerConfig.WorkingDir
}
// ENTRYPOINT
// User input entrypoint takes priority over image entrypoint
entrypoint := c.StringSlice("entrypoint")
if len(entrypoint) == 0 && data != nil {
entrypoint = data.ContainerConfig.Entrypoint
}
// if entrypoint=, we need to clear the entrypoint
if len(entrypoint) == 1 && c.IsSet("entrypoint") && strings.Join(c.StringSlice("entrypoint"), "") == "" {
entrypoint = []string{}
}
// Build the command
// If we have an entry point, it goes first
if len(entrypoint) > 0 {
command = entrypoint
}
if len(inputCommand) > 0 {
// User command overrides data CMD
command = append(command, inputCommand...)
} else if data != nil && len(data.ContainerConfig.Cmd) > 0 && !c.IsSet("entrypoint") {
// If not user command, add CMD
command = append(command, data.ContainerConfig.Cmd...)
}
if len(command) == 0 {
return nil, errors.Errorf("No command specified on command line or as CMD or ENTRYPOINT in this image")
}
// EXPOSED PORTS
var portBindings map[nat.Port][]nat.PortBinding
if data != nil {
portBindings, err = cc.ExposedPorts(c.StringSlice("expose"), c.StringSlice("publish"), c.Bool("publish-all"), data.ContainerConfig.ExposedPorts)
if err != nil {
return nil, err
}
}
// SHM Size
shmSize, err := units.FromHumanSize(c.String("shm-size"))
if err != nil {
return nil, errors.Wrapf(err, "unable to translate --shm-size")
}
// Network
netMode := container.NetworkMode(c.String("network"))
// Make sure if network is set to container namespace, port binding is not also being asked for
if netMode.IsContainer() {
if len(c.StringSlice("publish")) > 0 || c.Bool("publish-all") {
return nil, errors.Errorf("cannot set port bindings on an existing container network namespace")
}
}
// Verify the additional hosts are in correct format
for _, host := range c.StringSlice("add-host") {
if _, err := validateExtraHost(host); err != nil {
return nil, err
}
}
// Check for . and dns-search domains
if util.StringInSlice(".", c.StringSlice("dns-search")) && len(c.StringSlice("dns-search")) > 1 {
return nil, errors.Errorf("cannot pass additional search domains when also specifying '.'")
}
// Validate domains are good
for _, dom := range c.StringSlice("dns-search") {
if _, err := validateDomain(dom); err != nil {
return nil, err
}
}
var ImageVolumes map[string]struct{}
if data != nil {
ImageVolumes = data.ContainerConfig.Volumes
}
var imageVolType = map[string]string{
"bind": "",
"tmpfs": "",
"ignore": "",
}
if _, ok := imageVolType[c.String("image-volume")]; !ok {
return nil, errors.Errorf("invalid image-volume type %q. Pick one of bind, tmpfs, or ignore", c.String("image-volume"))
}
config := &cc.CreateConfig{
Runtime: runtime,
Annotations: annotations,
BuiltinImgVolumes: ImageVolumes,
ConmonPidFile: c.String("conmon-pidfile"),
ImageVolumeType: c.String("image-volume"),
CapAdd: c.StringSlice("cap-add"),
CapDrop: c.StringSlice("cap-drop"),
CgroupParent: c.String("cgroup-parent"),
Command: command,
Detach: c.Bool("detach"),
Devices: c.StringSlice("device"),
DNSOpt: c.StringSlice("dns-opt"),
DNSSearch: c.StringSlice("dns-search"),
DNSServers: c.StringSlice("dns"),
Entrypoint: entrypoint,
Env: env,
//ExposedPorts: ports,
GroupAdd: c.StringSlice("group-add"),
Hostname: c.String("hostname"),
HostAdd: c.StringSlice("add-host"),
IDMappings: idmappings,
Image: imageName,
ImageID: imageID,
Interactive: c.Bool("interactive"),
IP6Address: c.String("ipv6"),
IPAddress: c.String("ip"),
Labels: labels,
LinkLocalIP: c.StringSlice("link-local-ip"),
LogDriver: c.String("log-driver"),
LogDriverOpt: c.StringSlice("log-opt"),
MacAddress: c.String("mac-address"),
Name: c.String("name"),
Network: c.String("network"),
NetworkAlias: c.StringSlice("network-alias"),
IpcMode: ipcMode,
NetMode: netMode,
UtsMode: utsMode,
PidMode: pidMode,
Pod: c.String("pod"),
Privileged: c.Bool("privileged"),
Publish: c.StringSlice("publish"),
PublishAll: c.Bool("publish-all"),
PortBindings: portBindings,
Quiet: c.Bool("quiet"),
ReadOnlyRootfs: c.Bool("read-only"),
Resources: cc.CreateResourceConfig{
BlkioWeight: blkioWeight,
BlkioWeightDevice: c.StringSlice("blkio-weight-device"),
CPUShares: c.Uint64("cpu-shares"),
CPUPeriod: c.Uint64("cpu-period"),
CPUsetCPUs: c.String("cpuset-cpus"),
CPUsetMems: c.String("cpuset-mems"),
CPUQuota: c.Int64("cpu-quota"),
CPURtPeriod: c.Uint64("cpu-rt-period"),
CPURtRuntime: c.Int64("cpu-rt-runtime"),
CPUs: c.Float64("cpus"),
DeviceReadBps: c.StringSlice("device-read-bps"),
DeviceReadIOps: c.StringSlice("device-read-iops"),
DeviceWriteBps: c.StringSlice("device-write-bps"),
DeviceWriteIOps: c.StringSlice("device-write-iops"),
DisableOomKiller: c.Bool("oom-kill-disable"),
ShmSize: shmSize,
Memory: memoryLimit,
MemoryReservation: memoryReservation,
MemorySwap: memorySwap,
MemorySwappiness: c.Int("memory-swappiness"),
KernelMemory: memoryKernel,
OomScoreAdj: c.Int("oom-score-adj"),
PidsLimit: c.Int64("pids-limit"),
Ulimit: c.StringSlice("ulimit"),
},
Rm: c.Bool("rm"),
ShmDir: shmDir,
StopSignal: stopSignal,
StopTimeout: c.Uint("stop-timeout"),
Sysctl: sysctl,
Tmpfs: c.StringSlice("tmpfs"),
Tty: tty,
User: user,
UsernsMode: usernsMode,
Volumes: c.StringSlice("volume"),
WorkDir: workDir,
Rootfs: rootfs,
VolumesFrom: c.StringSlice("volumes-from"),
}
if !config.Privileged {
if err := parseSecurityOpt(config, c.StringSlice("security-opt")); err != nil {
return nil, err
}
}
config.SecurityOpts = c.StringSlice("security-opt")
warnings, err := verifyContainerResources(config, false)
if err != nil {
return nil, err
}
for _, warning := range warnings {
fmt.Fprintln(os.Stderr, warning)
}
return config, nil
}
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