493 lines
14 KiB
Go
493 lines
14 KiB
Go
package generate
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import (
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"context"
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"os"
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"path/filepath"
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"strings"
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cdi "github.com/container-orchestrated-devices/container-device-interface/pkg"
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"github.com/containers/common/libimage"
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"github.com/containers/common/pkg/config"
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"github.com/containers/podman/v3/libpod"
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"github.com/containers/podman/v3/pkg/specgen"
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"github.com/containers/podman/v3/pkg/util"
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"github.com/containers/storage/types"
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spec "github.com/opencontainers/runtime-spec/specs-go"
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"github.com/opencontainers/selinux/go-selinux/label"
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"github.com/pkg/errors"
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"github.com/sirupsen/logrus"
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)
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// MakeContainer creates a container based on the SpecGenerator.
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// Returns the created, container and any warnings resulting from creating the
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// container, or an error.
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func MakeContainer(ctx context.Context, rt *libpod.Runtime, s *specgen.SpecGenerator) (*libpod.Container, error) {
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rtc, err := rt.GetConfig()
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if err != nil {
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return nil, err
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}
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// If joining a pod, retrieve the pod for use.
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var pod *libpod.Pod
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if s.Pod != "" {
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pod, err = rt.LookupPod(s.Pod)
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if err != nil {
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return nil, errors.Wrapf(err, "error retrieving pod %s", s.Pod)
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}
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}
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// Set defaults for unset namespaces
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if s.PidNS.IsDefault() {
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defaultNS, err := GetDefaultNamespaceMode("pid", rtc, pod)
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if err != nil {
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return nil, err
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}
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s.PidNS = defaultNS
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}
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if s.IpcNS.IsDefault() {
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defaultNS, err := GetDefaultNamespaceMode("ipc", rtc, pod)
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if err != nil {
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return nil, err
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}
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s.IpcNS = defaultNS
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}
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if s.UtsNS.IsDefault() {
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defaultNS, err := GetDefaultNamespaceMode("uts", rtc, pod)
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if err != nil {
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return nil, err
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}
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s.UtsNS = defaultNS
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}
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if s.UserNS.IsDefault() {
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defaultNS, err := GetDefaultNamespaceMode("user", rtc, pod)
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if err != nil {
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return nil, err
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}
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s.UserNS = defaultNS
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}
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if s.NetNS.IsDefault() {
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defaultNS, err := GetDefaultNamespaceMode("net", rtc, pod)
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if err != nil {
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return nil, err
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}
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s.NetNS = defaultNS
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}
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if s.CgroupNS.IsDefault() {
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defaultNS, err := GetDefaultNamespaceMode("cgroup", rtc, pod)
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if err != nil {
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return nil, err
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}
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s.CgroupNS = defaultNS
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}
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options := []libpod.CtrCreateOption{}
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if s.ContainerCreateCommand != nil {
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options = append(options, libpod.WithCreateCommand(s.ContainerCreateCommand))
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}
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var newImage *libimage.Image
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var imageData *libimage.ImageData
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if s.Rootfs != "" {
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options = append(options, libpod.WithRootFS(s.Rootfs))
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} else {
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var resolvedImageName string
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newImage, resolvedImageName, err = rt.LibimageRuntime().LookupImage(s.Image, nil)
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if err != nil {
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return nil, err
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}
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imageData, err = newImage.Inspect(ctx, false)
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if err != nil {
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return nil, err
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}
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// If the input name changed, we could properly resolve the
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// image. Otherwise, it must have been an ID where we're
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// defaulting to the first name or an empty one if no names are
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// present.
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if strings.HasPrefix(newImage.ID(), resolvedImageName) {
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names := newImage.Names()
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if len(names) > 0 {
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resolvedImageName = names[0]
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}
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}
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options = append(options, libpod.WithRootFSFromImage(newImage.ID(), resolvedImageName, s.RawImageName))
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}
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if err := s.Validate(); err != nil {
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return nil, errors.Wrap(err, "invalid config provided")
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}
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finalMounts, finalVolumes, finalOverlays, err := finalizeMounts(ctx, s, rt, rtc, newImage)
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if err != nil {
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return nil, err
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}
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command, err := makeCommand(ctx, s, imageData, rtc)
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if err != nil {
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return nil, err
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}
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opts, err := createContainerOptions(ctx, rt, s, pod, finalVolumes, finalOverlays, imageData, command)
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if err != nil {
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return nil, err
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}
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options = append(options, opts...)
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exitCommandArgs, err := CreateExitCommandArgs(rt.StorageConfig(), rtc, logrus.IsLevelEnabled(logrus.DebugLevel), s.Remove, false)
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if err != nil {
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return nil, err
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}
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options = append(options, libpod.WithExitCommand(exitCommandArgs))
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if len(s.Aliases) > 0 {
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options = append(options, libpod.WithNetworkAliases(s.Aliases))
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}
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if len(s.Devices) > 0 {
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opts = extractCDIDevices(s)
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options = append(options, opts...)
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}
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runtimeSpec, err := SpecGenToOCI(ctx, s, rt, rtc, newImage, finalMounts, pod, command)
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if err != nil {
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return nil, err
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}
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return rt.NewContainer(ctx, runtimeSpec, options...)
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}
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func extractCDIDevices(s *specgen.SpecGenerator) []libpod.CtrCreateOption {
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devs := make([]spec.LinuxDevice, 0, len(s.Devices))
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var cdiDevs []string
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var options []libpod.CtrCreateOption
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for _, device := range s.Devices {
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isCDIDevice, err := cdi.HasDevice(device.Path)
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if err != nil {
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logrus.Debugf("CDI HasDevice Error: %v", err)
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}
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if err == nil && isCDIDevice {
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cdiDevs = append(cdiDevs, device.Path)
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continue
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}
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devs = append(devs, device)
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}
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s.Devices = devs
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if len(cdiDevs) > 0 {
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options = append(options, libpod.WithCDI(cdiDevs))
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}
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return options
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}
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func createContainerOptions(ctx context.Context, rt *libpod.Runtime, s *specgen.SpecGenerator, pod *libpod.Pod, volumes []*specgen.NamedVolume, overlays []*specgen.OverlayVolume, imageData *libimage.ImageData, command []string) ([]libpod.CtrCreateOption, error) {
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var options []libpod.CtrCreateOption
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var err error
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if s.PreserveFDs > 0 {
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options = append(options, libpod.WithPreserveFDs(s.PreserveFDs))
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}
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if s.Stdin {
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options = append(options, libpod.WithStdin())
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}
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if s.Timezone != "" {
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options = append(options, libpod.WithTimezone(s.Timezone))
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}
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if s.Umask != "" {
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options = append(options, libpod.WithUmask(s.Umask))
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}
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if s.Volatile {
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options = append(options, libpod.WithVolatile())
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}
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useSystemd := false
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switch s.Systemd {
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case "always":
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useSystemd = true
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case "false":
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break
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case "", "true":
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if len(command) == 0 && imageData != nil {
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command = imageData.Config.Cmd
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}
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if len(command) > 0 {
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useSystemdCommands := map[string]bool{
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"/sbin/init": true,
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"/usr/sbin/init": true,
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"/usr/local/sbin/init": true,
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}
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if useSystemdCommands[command[0]] || (filepath.Base(command[0]) == "systemd") {
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useSystemd = true
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}
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}
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default:
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return nil, errors.Wrapf(err, "invalid value %q systemd option requires 'true, false, always'", s.Systemd)
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}
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logrus.Debugf("using systemd mode: %t", useSystemd)
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if useSystemd {
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// is StopSignal was not set by the user then set it to systemd
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// expected StopSigal
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if s.StopSignal == nil {
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stopSignal, err := util.ParseSignal("RTMIN+3")
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if err != nil {
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return nil, errors.Wrapf(err, "error parsing systemd signal")
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}
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s.StopSignal = &stopSignal
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}
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options = append(options, libpod.WithSystemd())
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}
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if len(s.SdNotifyMode) > 0 {
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options = append(options, libpod.WithSdNotifyMode(s.SdNotifyMode))
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}
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if len(s.Name) > 0 {
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logrus.Debugf("setting container name %s", s.Name)
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options = append(options, libpod.WithName(s.Name))
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}
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if pod != nil {
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logrus.Debugf("adding container to pod %s", pod.Name())
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options = append(options, rt.WithPod(pod))
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}
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destinations := []string{}
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// Take all mount and named volume destinations.
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for _, mount := range s.Mounts {
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destinations = append(destinations, mount.Destination)
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}
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for _, volume := range volumes {
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destinations = append(destinations, volume.Dest)
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}
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for _, overlayVolume := range overlays {
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destinations = append(destinations, overlayVolume.Destination)
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}
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for _, imageVolume := range s.ImageVolumes {
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destinations = append(destinations, imageVolume.Destination)
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}
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options = append(options, libpod.WithUserVolumes(destinations))
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if len(volumes) != 0 {
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var vols []*libpod.ContainerNamedVolume
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for _, v := range volumes {
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vols = append(vols, &libpod.ContainerNamedVolume{
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Name: v.Name,
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Dest: v.Dest,
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Options: v.Options,
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})
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}
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options = append(options, libpod.WithNamedVolumes(vols))
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}
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if len(overlays) != 0 {
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var vols []*libpod.ContainerOverlayVolume
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for _, v := range overlays {
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vols = append(vols, &libpod.ContainerOverlayVolume{
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Dest: v.Destination,
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Source: v.Source,
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Options: v.Options,
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})
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}
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options = append(options, libpod.WithOverlayVolumes(vols))
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}
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if len(s.ImageVolumes) != 0 {
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var vols []*libpod.ContainerImageVolume
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for _, v := range s.ImageVolumes {
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vols = append(vols, &libpod.ContainerImageVolume{
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Dest: v.Destination,
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Source: v.Source,
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ReadWrite: v.ReadWrite,
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})
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}
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options = append(options, libpod.WithImageVolumes(vols))
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}
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if s.Command != nil {
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options = append(options, libpod.WithCommand(s.Command))
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}
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if s.Entrypoint != nil {
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options = append(options, libpod.WithEntrypoint(s.Entrypoint))
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}
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// If the user did not specify a workdir on the CLI, let's extract it
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// from the image.
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if s.WorkDir == "" && imageData != nil {
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options = append(options, libpod.WithCreateWorkingDir())
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s.WorkDir = imageData.Config.WorkingDir
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}
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if s.WorkDir == "" {
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s.WorkDir = "/"
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}
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if s.StopSignal != nil {
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options = append(options, libpod.WithStopSignal(*s.StopSignal))
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}
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if s.StopTimeout != nil {
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options = append(options, libpod.WithStopTimeout(*s.StopTimeout))
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}
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if s.Timeout != 0 {
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options = append(options, libpod.WithTimeout(s.Timeout))
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}
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if s.LogConfiguration != nil {
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if len(s.LogConfiguration.Path) > 0 {
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options = append(options, libpod.WithLogPath(s.LogConfiguration.Path))
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}
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if s.LogConfiguration.Size > 0 {
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options = append(options, libpod.WithMaxLogSize(s.LogConfiguration.Size))
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}
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if len(s.LogConfiguration.Options) > 0 && s.LogConfiguration.Options["tag"] != "" {
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// Note: I'm really guessing here.
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options = append(options, libpod.WithLogTag(s.LogConfiguration.Options["tag"]))
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}
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if len(s.LogConfiguration.Driver) > 0 {
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options = append(options, libpod.WithLogDriver(s.LogConfiguration.Driver))
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}
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}
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// Security options
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if len(s.SelinuxOpts) > 0 {
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options = append(options, libpod.WithSecLabels(s.SelinuxOpts))
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} else {
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if pod != nil {
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// duplicate the security options from the pod
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processLabel, err := pod.ProcessLabel()
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if err != nil {
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return nil, err
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}
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if processLabel != "" {
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selinuxOpts, err := label.DupSecOpt(processLabel)
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if err != nil {
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return nil, err
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}
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options = append(options, libpod.WithSecLabels(selinuxOpts))
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}
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}
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}
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options = append(options, libpod.WithPrivileged(s.Privileged))
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// Get namespace related options
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namespaceOptions, err := namespaceOptions(ctx, s, rt, pod, imageData)
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if err != nil {
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return nil, err
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}
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options = append(options, namespaceOptions...)
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if len(s.ConmonPidFile) > 0 {
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options = append(options, libpod.WithConmonPidFile(s.ConmonPidFile))
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}
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options = append(options, libpod.WithLabels(s.Labels))
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if s.ShmSize != nil {
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options = append(options, libpod.WithShmSize(*s.ShmSize))
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}
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if s.Rootfs != "" {
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options = append(options, libpod.WithRootFS(s.Rootfs))
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}
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// Default used if not overridden on command line
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if s.RestartPolicy != "" {
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if s.RestartRetries != nil {
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options = append(options, libpod.WithRestartRetries(*s.RestartRetries))
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}
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options = append(options, libpod.WithRestartPolicy(s.RestartPolicy))
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}
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if s.ContainerHealthCheckConfig.HealthConfig != nil {
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options = append(options, libpod.WithHealthCheck(s.ContainerHealthCheckConfig.HealthConfig))
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logrus.Debugf("New container has a health check")
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}
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if len(s.Secrets) != 0 {
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manager, err := rt.SecretsManager()
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if err != nil {
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return nil, err
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}
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var secrs []*libpod.ContainerSecret
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for _, s := range s.Secrets {
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secr, err := manager.Lookup(s.Source)
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if err != nil {
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return nil, err
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}
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secrs = append(secrs, &libpod.ContainerSecret{
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Secret: secr,
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UID: s.UID,
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GID: s.GID,
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Mode: s.Mode,
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})
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}
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options = append(options, libpod.WithSecrets(secrs))
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}
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if len(s.EnvSecrets) != 0 {
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options = append(options, libpod.WithEnvSecrets(s.EnvSecrets))
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}
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if len(s.DependencyContainers) > 0 {
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deps := make([]*libpod.Container, 0, len(s.DependencyContainers))
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for _, ctr := range s.DependencyContainers {
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depCtr, err := rt.LookupContainer(ctr)
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if err != nil {
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return nil, errors.Wrapf(err, "%q is not a valid container, cannot be used as a dependency", ctr)
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}
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deps = append(deps, depCtr)
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}
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options = append(options, libpod.WithDependencyCtrs(deps))
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}
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if s.PidFile != "" {
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options = append(options, libpod.WithPidFile(s.PidFile))
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}
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return options, nil
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}
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func CreateExitCommandArgs(storageConfig types.StoreOptions, config *config.Config, syslog, rm, exec bool) ([]string, error) {
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// We need a cleanup process for containers in the current model.
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// But we can't assume that the caller is Podman - it could be another
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// user of the API.
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// As such, provide a way to specify a path to Podman, so we can
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// still invoke a cleanup process.
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podmanPath, err := os.Executable()
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if err != nil {
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return nil, err
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}
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command := []string{podmanPath,
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"--root", storageConfig.GraphRoot,
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"--runroot", storageConfig.RunRoot,
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"--log-level", logrus.GetLevel().String(),
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"--cgroup-manager", config.Engine.CgroupManager,
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"--tmpdir", config.Engine.TmpDir,
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}
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if config.Engine.OCIRuntime != "" {
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command = append(command, []string{"--runtime", config.Engine.OCIRuntime}...)
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}
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if storageConfig.GraphDriverName != "" {
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command = append(command, []string{"--storage-driver", storageConfig.GraphDriverName}...)
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}
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for _, opt := range storageConfig.GraphDriverOptions {
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command = append(command, []string{"--storage-opt", opt}...)
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}
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if config.Engine.EventsLogger != "" {
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command = append(command, []string{"--events-backend", config.Engine.EventsLogger}...)
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}
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if syslog {
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command = append(command, "--syslog")
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}
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command = append(command, []string{"container", "cleanup"}...)
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if rm {
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command = append(command, "--rm")
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}
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// This has to be absolutely last, to ensure that the exec session ID
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// will be added after it by Libpod.
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if exec {
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command = append(command, "--exec")
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}
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return command, nil
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}
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