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package generate
import (
"context"
"net"
"github.com/containers/common/pkg/config"
"github.com/containers/podman/v3/libpod"
"github.com/containers/podman/v3/libpod/define"
"github.com/containers/podman/v3/pkg/domain/entities"
"github.com/containers/podman/v3/pkg/rootless"
"github.com/containers/podman/v3/pkg/specgen"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
)
func MakePod(p *entities.PodSpec, rt *libpod.Runtime) (*libpod.Pod, error) {
if err := p.PodSpecGen.Validate(); err != nil {
return nil, err
}
if !p.PodSpecGen.NoInfra && p.PodSpecGen.InfraContainerSpec != nil {
var err error
p.PodSpecGen.InfraContainerSpec, err = MapSpec(&p.PodSpecGen)
if err != nil {
return nil, err
}
}
options, err := createPodOptions(&p.PodSpecGen, rt, p.PodSpecGen.InfraContainerSpec)
if err != nil {
return nil, err
}
pod, err := rt.NewPod(context.Background(), p.PodSpecGen, options...)
if err != nil {
return nil, err
}
if !p.PodSpecGen.NoInfra && p.PodSpecGen.InfraContainerSpec != nil {
p.PodSpecGen.InfraContainerSpec.ContainerCreateCommand = []string{} // we do NOT want os.Args as the command, will display the pod create cmd
if p.PodSpecGen.InfraContainerSpec.Name == "" {
p.PodSpecGen.InfraContainerSpec.Name = pod.ID()[:12] + "-infra"
}
_, err = CompleteSpec(context.Background(), rt, p.PodSpecGen.InfraContainerSpec)
if err != nil {
return nil, err
}
p.PodSpecGen.InfraContainerSpec.User = "" // infraSpec user will get incorrectly assigned via the container creation process, overwrite here
rtSpec, spec, opts, err := MakeContainer(context.Background(), rt, p.PodSpecGen.InfraContainerSpec)
if err != nil {
return nil, err
}
spec.Pod = pod.ID()
opts = append(opts, rt.WithPod(pod))
spec.CgroupParent = pod.CgroupParent()
infraCtr, err := ExecuteCreate(context.Background(), rt, rtSpec, spec, true, opts...)
if err != nil {
return nil, err
}
pod, err = rt.AddInfra(context.Background(), pod, infraCtr)
if err != nil {
return nil, err
}
}
return pod, nil
}
func createPodOptions(p *specgen.PodSpecGenerator, rt *libpod.Runtime, infraSpec *specgen.SpecGenerator) ([]libpod.PodCreateOption, error) {
var (
options []libpod.PodCreateOption
)
if !p.NoInfra { //&& infraSpec != nil {
options = append(options, libpod.WithInfraContainer())
nsOptions, err := GetNamespaceOptions(p.SharedNamespaces, p.InfraContainerSpec.NetNS.IsHost())
if err != nil {
return nil, err
}
options = append(options, nsOptions...)
// Use pod user and infra userns only when --userns is not set to host
if !p.InfraContainerSpec.UserNS.IsHost() && !p.InfraContainerSpec.UserNS.IsDefault() {
options = append(options, libpod.WithPodUser())
}
}
if len(p.CgroupParent) > 0 {
options = append(options, libpod.WithPodCgroupParent(p.CgroupParent))
}
if len(p.Labels) > 0 {
options = append(options, libpod.WithPodLabels(p.Labels))
}
if len(p.Name) > 0 {
options = append(options, libpod.WithPodName(p.Name))
}
if p.PodCreateCommand != nil {
options = append(options, libpod.WithPodCreateCommand(p.PodCreateCommand))
}
if len(p.Hostname) > 0 {
options = append(options, libpod.WithPodHostname(p.Hostname))
}
return options, nil
}
// MapSpec modifies the already filled Infra specgenerator,
// replacing necessary values with those specified in pod creation
func MapSpec(p *specgen.PodSpecGenerator) (*specgen.SpecGenerator, error) {
if len(p.PortMappings) > 0 {
ports, _, _, err := ParsePortMapping(p.PortMappings)
if err != nil {
return nil, err
}
p.InfraContainerSpec.PortMappings = libpod.WithInfraContainerPorts(ports, p.InfraContainerSpec)
}
switch p.NetNS.NSMode {
case specgen.Default, "":
if p.NoInfra {
logrus.Debugf("No networking because the infra container is missing")
break
}
if rootless.IsRootless() {
logrus.Debugf("Pod will use slirp4netns")
if p.InfraContainerSpec.NetNS.NSMode != "host" {
p.InfraContainerSpec.NetworkOptions = p.NetworkOptions
p.InfraContainerSpec.NetNS.NSMode = specgen.NamespaceMode("slirp4netns")
}
} else {
logrus.Debugf("Pod using bridge network mode")
}
case specgen.Bridge:
p.InfraContainerSpec.NetNS.NSMode = specgen.Bridge
logrus.Debugf("Pod using bridge network mode")
case specgen.Host:
logrus.Debugf("Pod will use host networking")
if len(p.InfraContainerSpec.PortMappings) > 0 ||
p.InfraContainerSpec.StaticIP != nil ||
p.InfraContainerSpec.StaticMAC != nil ||
len(p.InfraContainerSpec.CNINetworks) > 0 ||
p.InfraContainerSpec.NetNS.NSMode == specgen.NoNetwork {
return nil, errors.Wrapf(define.ErrInvalidArg, "cannot set host network if network-related configuration is specified")
}
p.InfraContainerSpec.NetNS.NSMode = specgen.Host
case specgen.Slirp:
logrus.Debugf("Pod will use slirp4netns")
if p.InfraContainerSpec.NetNS.NSMode != "host" {
p.InfraContainerSpec.NetworkOptions = p.NetworkOptions
p.InfraContainerSpec.NetNS.NSMode = specgen.NamespaceMode("slirp4netns")
}
case specgen.NoNetwork:
logrus.Debugf("Pod will not use networking")
if len(p.InfraContainerSpec.PortMappings) > 0 ||
p.InfraContainerSpec.StaticIP != nil ||
p.InfraContainerSpec.StaticMAC != nil ||
len(p.InfraContainerSpec.CNINetworks) > 0 ||
p.InfraContainerSpec.NetNS.NSMode == "host" {
return nil, errors.Wrapf(define.ErrInvalidArg, "cannot disable pod network if network-related configuration is specified")
}
p.InfraContainerSpec.NetNS.NSMode = specgen.NoNetwork
default:
return nil, errors.Errorf("pods presently do not support network mode %s", p.NetNS.NSMode)
}
libpod.WithPodCgroups()
if len(p.InfraCommand) > 0 {
p.InfraContainerSpec.Entrypoint = p.InfraCommand
}
if len(p.HostAdd) > 0 {
p.InfraContainerSpec.HostAdd = p.HostAdd
}
if len(p.DNSServer) > 0 {
var dnsServers []net.IP
dnsServers = append(dnsServers, p.DNSServer...)
p.InfraContainerSpec.DNSServers = dnsServers
}
if len(p.DNSOption) > 0 {
p.InfraContainerSpec.DNSOptions = p.DNSOption
}
if len(p.DNSSearch) > 0 {
p.InfraContainerSpec.DNSSearch = p.DNSSearch
}
if p.StaticIP != nil {
p.InfraContainerSpec.StaticIP = p.StaticIP
}
if p.StaticMAC != nil {
p.InfraContainerSpec.StaticMAC = p.StaticMAC
}
if p.NoManageResolvConf {
p.InfraContainerSpec.UseImageResolvConf = true
}
if len(p.CNINetworks) > 0 {
p.InfraContainerSpec.CNINetworks = p.CNINetworks
}
if p.NoManageHosts {
p.InfraContainerSpec.UseImageHosts = p.NoManageHosts
}
if len(p.InfraConmonPidFile) > 0 {
p.InfraContainerSpec.ConmonPidFile = p.InfraConmonPidFile
}
if p.InfraImage != config.DefaultInfraImage {
p.InfraContainerSpec.Image = p.InfraImage
}
return p.InfraContainerSpec, nil
}
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