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package generate
import (
"context"
"github.com/containers/image/v5/manifest"
"github.com/containers/podman/v2/libpod"
"github.com/containers/podman/v2/libpod/image"
ann "github.com/containers/podman/v2/pkg/annotations"
envLib "github.com/containers/podman/v2/pkg/env"
"github.com/containers/podman/v2/pkg/signal"
"github.com/containers/podman/v2/pkg/specgen"
spec "github.com/opencontainers/runtime-spec/specs-go"
"github.com/pkg/errors"
"golang.org/x/sys/unix"
)
// Fill any missing parts of the spec generator (e.g. from the image).
// Returns a set of warnings or any fatal error that occurred.
func CompleteSpec(ctx context.Context, r *libpod.Runtime, s *specgen.SpecGenerator) ([]string, error) {
var (
newImage *image.Image
err error
)
// Only add image configuration if we have an image
if s.Image != "" {
newImage, err = r.ImageRuntime().NewFromLocal(s.Image)
if err != nil {
return nil, err
}
_, mediaType, err := newImage.Manifest(ctx)
if err != nil {
return nil, err
}
if s.HealthConfig == nil && mediaType == manifest.DockerV2Schema2MediaType {
s.HealthConfig, err = newImage.GetHealthCheck(ctx)
if err != nil {
return nil, err
}
}
// Image stop signal
if s.StopSignal == nil {
stopSignal, err := newImage.StopSignal(ctx)
if err != nil {
return nil, err
}
if stopSignal != "" {
sig, err := signal.ParseSignalNameOrNumber(stopSignal)
if err != nil {
return nil, err
}
s.StopSignal = &sig
}
}
}
rtc, err := r.GetConfig()
if err != nil {
return nil, err
}
// Get Default Environment
defaultEnvs, err := envLib.ParseSlice(rtc.Containers.Env)
if err != nil {
return nil, errors.Wrap(err, "Env fields in containers.conf failed to parse")
}
var envs map[string]string
if newImage != nil {
// Image envs from the image if they don't exist
// already, overriding the default environments
imageEnvs, err := newImage.Env(ctx)
if err != nil {
return nil, err
}
envs, err = envLib.ParseSlice(imageEnvs)
if err != nil {
return nil, errors.Wrap(err, "Env fields from image failed to parse")
}
}
s.Env = envLib.Join(envLib.Join(defaultEnvs, envs), s.Env)
// Labels and Annotations
annotations := make(map[string]string)
if newImage != nil {
labels, err := newImage.Labels(ctx)
if err != nil {
return nil, err
}
// labels from the image that dont exist already
if len(labels) > 0 && s.Labels == nil {
s.Labels = make(map[string]string)
}
for k, v := range labels {
if _, exists := s.Labels[k]; !exists {
s.Labels[k] = v
}
}
// Add annotations from the image
imgAnnotations, err := newImage.Annotations(ctx)
if err != nil {
return nil, err
}
for k, v := range imgAnnotations {
annotations[k] = v
}
}
// in the event this container is in a pod, and the pod has an infra container
// we will want to configure it as a type "container" instead defaulting to
// the behavior of a "sandbox" container
// In Kata containers:
// - "sandbox" is the annotation that denotes the container should use its own
// VM, which is the default behavior
// - "container" denotes the container should join the VM of the SandboxID
// (the infra container)
if len(s.Pod) > 0 {
annotations[ann.SandboxID] = s.Pod
annotations[ann.ContainerType] = ann.ContainerTypeContainer
}
// now pass in the values from client
for k, v := range s.Annotations {
annotations[k] = v
}
s.Annotations = annotations
// workdir
if s.WorkDir == "" {
if newImage != nil {
workingDir, err := newImage.WorkingDir(ctx)
if err != nil {
return nil, err
}
s.WorkDir = workingDir
}
}
if s.WorkDir == "" {
s.WorkDir = "/"
}
if len(s.SeccompProfilePath) < 1 {
p, err := libpod.DefaultSeccompPath()
if err != nil {
return nil, err
}
s.SeccompProfilePath = p
}
if len(s.User) == 0 && newImage != nil {
s.User, err = newImage.User(ctx)
if err != nil {
return nil, err
}
}
if err := finishThrottleDevices(s); err != nil {
return nil, err
}
// Unless already set via the CLI, check if we need to disable process
// labels or set the defaults.
if len(s.SelinuxOpts) == 0 {
if err := setLabelOpts(s, r, s.PidNS, s.IpcNS); err != nil {
return nil, err
}
}
// If caller did not specify Pids Limits load default
if s.ResourceLimits == nil || s.ResourceLimits.Pids == nil {
if s.CgroupsMode != "disabled" {
limit := rtc.PidsLimit()
if limit != 0 {
if s.ResourceLimits == nil {
s.ResourceLimits = &spec.LinuxResources{}
}
s.ResourceLimits.Pids = &spec.LinuxPids{
Limit: limit,
}
}
}
}
return verifyContainerResources(s)
}
// finishThrottleDevices takes the temporary representation of the throttle
// devices in the specgen and looks up the major and major minors. it then
// sets the throttle devices proper in the specgen
func finishThrottleDevices(s *specgen.SpecGenerator) error {
if bps := s.ThrottleReadBpsDevice; len(bps) > 0 {
for k, v := range bps {
statT := unix.Stat_t{}
if err := unix.Stat(k, &statT); err != nil {
return err
}
v.Major = (int64(unix.Major(statT.Rdev)))
v.Minor = (int64(unix.Minor(statT.Rdev)))
s.ResourceLimits.BlockIO.ThrottleReadBpsDevice = append(s.ResourceLimits.BlockIO.ThrottleReadBpsDevice, v)
}
}
if bps := s.ThrottleWriteBpsDevice; len(bps) > 0 {
for k, v := range bps {
statT := unix.Stat_t{}
if err := unix.Stat(k, &statT); err != nil {
return err
}
v.Major = (int64(unix.Major(statT.Rdev)))
v.Minor = (int64(unix.Minor(statT.Rdev)))
s.ResourceLimits.BlockIO.ThrottleWriteBpsDevice = append(s.ResourceLimits.BlockIO.ThrottleWriteBpsDevice, v)
}
}
if iops := s.ThrottleReadIOPSDevice; len(iops) > 0 {
for k, v := range iops {
statT := unix.Stat_t{}
if err := unix.Stat(k, &statT); err != nil {
return err
}
v.Major = (int64(unix.Major(statT.Rdev)))
v.Minor = (int64(unix.Minor(statT.Rdev)))
s.ResourceLimits.BlockIO.ThrottleReadIOPSDevice = append(s.ResourceLimits.BlockIO.ThrottleReadIOPSDevice, v)
}
}
if iops := s.ThrottleWriteIOPSDevice; len(iops) > 0 {
for k, v := range iops {
statT := unix.Stat_t{}
if err := unix.Stat(k, &statT); err != nil {
return err
}
v.Major = (int64(unix.Major(statT.Rdev)))
v.Minor = (int64(unix.Minor(statT.Rdev)))
s.ResourceLimits.BlockIO.ThrottleWriteIOPSDevice = append(s.ResourceLimits.BlockIO.ThrottleWriteIOPSDevice, v)
}
}
return nil
}
|
