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kube.go
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kube.go
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//go:build !remote
package libpod
import (
"context"
"errors"
"fmt"
"math/rand"
"os"
"reflect"
"slices"
"sort"
"strconv"
"strings"
"time"
"github.com/containers/common/libnetwork/types"
"github.com/containers/common/pkg/config"
"github.com/containers/podman/v5/libpod/define"
"github.com/containers/podman/v5/pkg/domain/entities"
"github.com/containers/podman/v5/pkg/env"
v1 "github.com/containers/podman/v5/pkg/k8s.io/api/core/v1"
"github.com/containers/podman/v5/pkg/k8s.io/apimachinery/pkg/api/resource"
v12 "github.com/containers/podman/v5/pkg/k8s.io/apimachinery/pkg/apis/meta/v1"
"github.com/containers/podman/v5/pkg/k8s.io/apimachinery/pkg/util/intstr"
"github.com/containers/podman/v5/pkg/lookup"
"github.com/containers/podman/v5/pkg/namespaces"
"github.com/containers/podman/v5/pkg/specgen"
"github.com/containers/podman/v5/pkg/util"
"github.com/opencontainers/runtime-spec/specs-go"
"github.com/sirupsen/logrus"
)
// GenerateForKube takes a slice of libpod containers and generates
// one v1.Pod description that includes just a single container.
func GenerateForKube(ctx context.Context, ctrs []*Container, getService, podmanOnly bool) (*v1.Pod, error) {
// Generate the v1.Pod yaml description
return simplePodWithV1Containers(ctx, ctrs, getService, podmanOnly)
}
// GenerateForKube takes a slice of libpod containers and generates
// one v1.Pod description
func (p *Pod) GenerateForKube(ctx context.Context, getService, podmanOnly bool) (*v1.Pod, []v1.ServicePort, error) {
// Generate the v1.Pod yaml description
var (
ports []v1.ContainerPort
servicePorts []v1.ServicePort
)
allContainers, err := p.allContainers()
if err != nil {
return nil, servicePorts, err
}
// If the pod has no containers, no sense to generate YAML
if len(allContainers) == 0 {
return nil, servicePorts, fmt.Errorf("pod %s has no containers", p.ID())
}
// If only an infra container is present, makes no sense to generate YAML
if len(allContainers) == 1 && p.HasInfraContainer() {
return nil, servicePorts, fmt.Errorf("pod %s only has an infra container", p.ID())
}
extraHost := make([]v1.HostAlias, 0)
hostNetwork := false
hostUsers := true
infraName := ""
if p.HasInfraContainer() {
infraContainer, err := p.getInfraContainer()
if err != nil {
return nil, servicePorts, err
}
for _, host := range infraContainer.config.ContainerNetworkConfig.HostAdd {
hostname, ip, hasIP := strings.Cut(host, ":")
if !hasIP {
return nil, servicePorts, errors.New("invalid hostAdd")
}
extraHost = append(extraHost, v1.HostAlias{
IP: ip,
Hostnames: []string{hostname},
})
}
ports, err = portMappingToContainerPort(infraContainer.config.PortMappings, getService)
if err != nil {
return nil, servicePorts, err
}
spState := newServicePortState()
servicePorts, err = spState.containerPortsToServicePorts(ports)
if err != nil {
return nil, servicePorts, err
}
hostNetwork = infraContainer.NetworkMode() == string(namespaces.NetworkMode(specgen.Host))
hostUsers = infraContainer.IDMappings().HostUIDMapping && infraContainer.IDMappings().HostGIDMapping
infraName = infraContainer.config.Name
}
pod, err := p.podWithContainers(ctx, allContainers, ports, hostNetwork, hostUsers, getService, podmanOnly, infraName)
if err != nil {
return nil, servicePorts, err
}
pod.Spec.HostAliases = extraHost
// Set the pod's restart policy
pod.Spec.RestartPolicy = getPodRestartPolicy(p.config.RestartPolicy)
if p.SharesPID() {
// unfortunately, go doesn't have a nice way to specify a pointer to a bool
b := true
pod.Spec.ShareProcessNamespace = &b
}
return pod, servicePorts, nil
}
func (p *Pod) getInfraContainer() (*Container, error) {
infraID, err := p.InfraContainerID()
if err != nil {
return nil, err
}
return p.runtime.GetContainer(infraID)
}
func GenerateForKubeDaemonSet(ctx context.Context, pod *YAMLPod, options entities.GenerateKubeOptions) (*YAMLDaemonSet, error) {
// Restart policy for DaemonSets can only be set to Always
if !(pod.Spec.RestartPolicy == "" || pod.Spec.RestartPolicy == v1.RestartPolicyAlways) {
return nil, fmt.Errorf("k8s DaemonSets can only have restartPolicy set to Always")
}
// Error out if the user tries to set replica count
if options.Replicas > 1 {
return nil, fmt.Errorf("k8s DaemonSets don't allow setting replicas")
}
// Create label map that will be added to podSpec and DaemonSet metadata
// The matching label lets the daemonset know which pod to manage
appKey := "app"
matchLabels := map[string]string{appKey: pod.Name}
// Add the key:value (app:pod-name) to the podSpec labels
if pod.Labels == nil {
pod.Labels = matchLabels
} else {
pod.Labels[appKey] = pod.Name
}
depSpec := YAMLDaemonSetSpec{
DaemonSetSpec: v1.DaemonSetSpec{
Selector: &v12.LabelSelector{
MatchLabels: matchLabels,
},
},
Template: &YAMLPodTemplateSpec{
PodTemplateSpec: v1.PodTemplateSpec{
ObjectMeta: pod.ObjectMeta,
},
Spec: pod.Spec,
},
}
// Create the DaemonSet object
dep := YAMLDaemonSet{
DaemonSet: v1.DaemonSet{
ObjectMeta: v12.ObjectMeta{
Name: pod.Name + "-daemonset",
CreationTimestamp: pod.CreationTimestamp,
Labels: pod.Labels,
},
TypeMeta: v12.TypeMeta{
Kind: "DaemonSet",
APIVersion: "apps/v1",
},
},
Spec: &depSpec,
}
return &dep, nil
}
// GenerateForKubeDeployment returns a YAMLDeployment from a YAMLPod that is then used to create a kubernetes Deployment
// kind YAML.
func GenerateForKubeDeployment(ctx context.Context, pod *YAMLPod, options entities.GenerateKubeOptions) (*YAMLDeployment, error) {
// Restart policy for Deployments can only be set to Always
if options.Type == define.K8sKindDeployment && !(pod.Spec.RestartPolicy == "" || pod.Spec.RestartPolicy == v1.RestartPolicyAlways) {
return nil, fmt.Errorf("k8s Deployments can only have restartPolicy set to Always")
}
// Create label map that will be added to podSpec and Deployment metadata
// The matching label lets the deployment know which pods to manage
appKey := "app"
matchLabels := map[string]string{appKey: pod.Name}
// Add the key:value (app:pod-name) to the podSpec labels
if pod.Labels == nil {
pod.Labels = matchLabels
} else {
pod.Labels[appKey] = pod.Name
}
depSpec := YAMLDeploymentSpec{
DeploymentSpec: v1.DeploymentSpec{
Selector: &v12.LabelSelector{
MatchLabels: matchLabels,
},
},
Template: &YAMLPodTemplateSpec{
PodTemplateSpec: v1.PodTemplateSpec{
ObjectMeta: pod.ObjectMeta,
},
Spec: pod.Spec,
},
}
// Add replicas count if user adds replica number with --replicas flag and is greater than 1
// If replicas is set to 1, no need to add it to the generated yaml as k8s automatically defaults
// to that. Podman as sets replicas to 1 by default.
if options.Replicas > 1 {
depSpec.Replicas = &options.Replicas
}
// Create the Deployment object
dep := YAMLDeployment{
Deployment: v1.Deployment{
ObjectMeta: v12.ObjectMeta{
Name: pod.Name + "-deployment",
CreationTimestamp: pod.CreationTimestamp,
Labels: pod.Labels,
},
TypeMeta: v12.TypeMeta{
Kind: "Deployment",
APIVersion: "apps/v1",
},
},
Spec: &depSpec,
}
return &dep, nil
}
// GenerateForKubeJob returns a YAMLDeployment from a YAMLPod that is then used to create a kubernetes Job
// kind YAML.
func GenerateForKubeJob(ctx context.Context, pod *YAMLPod, options entities.GenerateKubeOptions) (*YAMLJob, error) {
// Restart policy for Job cannot be set to Always
if options.Type == define.K8sKindJob && pod.Spec.RestartPolicy == v1.RestartPolicyAlways {
return nil, fmt.Errorf("k8s Jobs can not have restartPolicy set to Always; only Never and OnFailure policies allowed")
}
// Create label map that will be added to podSpec and Job metadata
// The matching label lets the job know which pods to manage
appKey := "app"
matchLabels := map[string]string{appKey: pod.Name}
// Add the key:value (app:pod-name) to the podSpec labels
if pod.Labels == nil {
pod.Labels = matchLabels
} else {
pod.Labels[appKey] = pod.Name
}
jobSpec := YAMLJobSpec{
Template: &YAMLPodTemplateSpec{
PodTemplateSpec: v1.PodTemplateSpec{
ObjectMeta: pod.ObjectMeta,
},
Spec: pod.Spec,
},
}
// Set the completions and parallelism to 1 by default for the Job
completions, parallelism := int32(1), int32(1)
jobSpec.Completions = &completions
jobSpec.Parallelism = ¶llelism
// Set the restart policy to never as k8s requires a job to have a restart policy
// of onFailure or never set in the kube yaml
jobSpec.Template.Spec.RestartPolicy = v1.RestartPolicyNever
// Create the Deployment object
job := YAMLJob{
Job: v1.Job{
ObjectMeta: v12.ObjectMeta{
Name: pod.Name + "-job",
CreationTimestamp: pod.CreationTimestamp,
Labels: pod.Labels,
},
TypeMeta: v12.TypeMeta{
Kind: "Job",
APIVersion: "batch/v1",
},
},
Spec: &jobSpec,
}
return &job, nil
}
// GenerateForKube generates a v1.PersistentVolumeClaim from a libpod volume.
func (v *Volume) GenerateForKube() *v1.PersistentVolumeClaim {
annotations := make(map[string]string)
annotations[util.VolumeDriverAnnotation] = v.Driver()
for k, v := range v.Options() {
switch k {
case "o":
annotations[util.VolumeMountOptsAnnotation] = v
case "device":
annotations[util.VolumeDeviceAnnotation] = v
case "type":
annotations[util.VolumeTypeAnnotation] = v
case "UID":
annotations[util.VolumeUIDAnnotation] = v
case "GID":
annotations[util.VolumeGIDAnnotation] = v
}
}
return &v1.PersistentVolumeClaim{
TypeMeta: v12.TypeMeta{
Kind: "PersistentVolumeClaim",
APIVersion: "v1",
},
ObjectMeta: v12.ObjectMeta{
Name: v.Name(),
Labels: v.Labels(),
Annotations: annotations,
CreationTimestamp: v12.Now(),
},
Spec: v1.PersistentVolumeClaimSpec{
Resources: v1.ResourceRequirements{
Requests: map[v1.ResourceName]resource.Quantity{
v1.ResourceStorage: resource.MustParse("1Gi"),
},
},
AccessModes: []v1.PersistentVolumeAccessMode{
v1.ReadWriteOnce,
},
},
}
}
// YAMLPodSpec represents the same k8s API core PodSpec struct with a small
// change and that is having Containers as a pointer to YAMLContainer.
// Because Go doesn't omit empty struct and we want to omit Status in YAML
// if it's empty. Fixes: GH-11998
type YAMLPodSpec struct {
v1.PodSpec
Containers []*YAMLContainer `json:"containers"`
}
// YAMLPod represents the same k8s API core Pod struct with a small
// change and that is having Spec as a pointer to YAMLPodSpec and
// Status as a pointer to k8s API core PodStatus.
// Because Go doesn't omit empty struct and we want to omit Status in YAML
// if it's empty. Fixes: GH-11998
type YAMLPod struct {
v1.Pod
Spec *YAMLPodSpec `json:"spec,omitempty"`
Status *v1.PodStatus `json:"status,omitempty"`
}
// YAMLPodTemplateSpec represents the same k8s API core PodTemplateStruct with a
// small change and that is having Spec as a pointer to YAMLPodSpec.
// Because Go doesn't omit empty struct and we want to omit any empty structs in the
// Pod yaml. This is used when generating a Deployment kind.
type YAMLPodTemplateSpec struct {
v1.PodTemplateSpec
Spec *YAMLPodSpec `json:"spec,omitempty"`
}
// YAMLDeploymentSpec represents the same k8s API core DeploymentSpec with a small
// change and that is having Template as a pointer to YAMLPodTemplateSpec and Strategy
// as a pointer to k8s API core DeploymentStrategy.
// Because Go doesn't omit empty struct and we want to omit Strategy and any fields in the Pod YAML
// if it's empty.
type YAMLDeploymentSpec struct {
v1.DeploymentSpec
Template *YAMLPodTemplateSpec `json:"template,omitempty"`
Strategy *v1.DeploymentStrategy `json:"strategy,omitempty"`
}
// YAMLDaemonSetSpec represents the same k8s API core DeploymentSpec with a small
// change and that is having Template as a pointer to YAMLPodTemplateSpec and Strategy
// as a pointer to k8s API core DaemonSetStrategy.
// Because Go doesn't omit empty struct and we want to omit Strategy and any fields in the Pod YAML
// if it's empty.
type YAMLDaemonSetSpec struct {
v1.DaemonSetSpec
Template *YAMLPodTemplateSpec `json:"template,omitempty"`
Strategy *v1.DaemonSetUpdateStrategy `json:"strategy,omitempty"`
}
// YAMLJobSpec represents the same k8s API core JobSpec with a small
// change and that is having Template as a pointer to YAMLPodTemplateSpec
// because Go doesn't omit empty struct and we want to omit Strategy and any fields in the Pod YAML
// if it's empty.
type YAMLJobSpec struct {
v1.JobSpec
Template *YAMLPodTemplateSpec `json:"template,omitempty"`
}
// YAMLDaemonSet represents the same k8s API core DaemonSet with a small change
// and that is having Spec as a pointer to YAMLDaemonSetSpec and Status as a pointer to
// k8s API core DaemonSetStatus.
// Because Go doesn't omit empty struct and we want to omit Status and any fields in the DaemonSetSpec
// if it's empty.
type YAMLDaemonSet struct {
v1.DaemonSet
Spec *YAMLDaemonSetSpec `json:"spec,omitempty"`
Status *v1.DaemonSetStatus `json:"status,omitempty"`
}
// YAMLDeployment represents the same k8s API core Deployment with a small change
// and that is having Spec as a pointer to YAMLDeploymentSpec and Status as a pointer to
// k8s API core DeploymentStatus.
// Because Go doesn't omit empty struct and we want to omit Status and any fields in the DeploymentSpec
// if it's empty.
type YAMLDeployment struct {
v1.Deployment
Spec *YAMLDeploymentSpec `json:"spec,omitempty"`
Status *v1.DeploymentStatus `json:"status,omitempty"`
}
type YAMLJob struct {
v1.Job
Spec *YAMLJobSpec `json:"spec,omitempty"`
Status *v1.JobStatus `json:"status,omitempty"`
}
// YAMLService represents the same k8s API core Service struct with a small
// change and that is having Status as a pointer to k8s API core ServiceStatus.
// Because Go doesn't omit empty struct and we want to omit Status in YAML
// if it's empty. Fixes: GH-11998
type YAMLService struct {
v1.Service
Status *v1.ServiceStatus `json:"status,omitempty"`
}
// YAMLContainer represents the same k8s API core Container struct with a small
// change and that is having Resources as a pointer to k8s API core ResourceRequirements.
// Because Go doesn't omit empty struct and we want to omit Status in YAML
// if it's empty. Fixes: GH-11998
type YAMLContainer struct {
v1.Container
Resources *v1.ResourceRequirements `json:"resources,omitempty"`
}
// ConvertV1PodToYAMLPod takes k8s API core Pod and returns a pointer to YAMLPod
func ConvertV1PodToYAMLPod(pod *v1.Pod) *YAMLPod {
cs := []*YAMLContainer{}
for _, cc := range pod.Spec.Containers {
var res *v1.ResourceRequirements
if len(cc.Resources.Limits) > 0 || len(cc.Resources.Requests) > 0 {
res = &cc.Resources
}
cs = append(cs, &YAMLContainer{Container: cc, Resources: res})
}
mpo := &YAMLPod{Pod: *pod}
mpo.Spec = &YAMLPodSpec{PodSpec: pod.Spec, Containers: cs}
for _, ctr := range pod.Spec.Containers {
if ctr.SecurityContext == nil || ctr.SecurityContext.SELinuxOptions == nil {
continue
}
selinuxOpts := ctr.SecurityContext.SELinuxOptions
if selinuxOpts.User == "" && selinuxOpts.Role == "" && selinuxOpts.Type == "" && selinuxOpts.Level == "" && selinuxOpts.FileType == "" {
ctr.SecurityContext.SELinuxOptions = nil
}
}
dnsCfg := pod.Spec.DNSConfig
if dnsCfg != nil && (len(dnsCfg.Nameservers)+len(dnsCfg.Searches)+len(dnsCfg.Options) > 0) {
mpo.Spec.DNSConfig = dnsCfg
}
status := pod.Status
if status.Phase != "" || len(status.Conditions) > 0 ||
status.Message != "" || status.Reason != "" ||
status.NominatedNodeName != "" || status.HostIP != "" ||
status.PodIP != "" || status.StartTime != nil ||
len(status.InitContainerStatuses) > 0 || len(status.ContainerStatuses) > 0 || status.QOSClass != "" || len(status.EphemeralContainerStatuses) > 0 {
mpo.Status = &status
}
return mpo
}
// GenerateKubeServiceFromV1Pod creates a v1 service object from a v1 pod object
func GenerateKubeServiceFromV1Pod(pod *v1.Pod, servicePorts []v1.ServicePort) (YAMLService, error) {
service := YAMLService{}
selector := make(map[string]string)
selector["app"] = pod.Labels["app"]
ports := servicePorts
if len(ports) == 0 {
p, err := containersToServicePorts(pod.Spec.Containers)
if err != nil {
return service, err
}
ports = p
}
serviceSpec := v1.ServiceSpec{
Ports: ports,
Selector: selector,
Type: v1.ServiceTypeNodePort,
}
service.Spec = serviceSpec
service.ObjectMeta = pod.ObjectMeta
// Reset the annotations for the service as the pod annotations are not needed for the service
service.ObjectMeta.Annotations = nil
tm := v12.TypeMeta{
Kind: "Service",
APIVersion: pod.TypeMeta.APIVersion,
}
service.TypeMeta = tm
return service, nil
}
// servicePortState allows calling containerPortsToServicePorts for a single service
type servicePortState struct {
// A program using the shared math/rand state with the default seed will produce the same sequence of pseudo-random numbers
// for each execution. Use a private RNG state not to interfere with other users.
rng *rand.Rand
usedPorts map[int]struct{}
}
func newServicePortState() servicePortState {
return servicePortState{
rng: rand.New(rand.NewSource(time.Now().UnixNano())),
usedPorts: map[int]struct{}{},
}
}
// containerPortsToServicePorts takes a slice of containerports and generates a
// slice of service ports
func (state *servicePortState) containerPortsToServicePorts(containerPorts []v1.ContainerPort) ([]v1.ServicePort, error) {
sps := make([]v1.ServicePort, 0, len(containerPorts))
for _, cp := range containerPorts {
var nodePort int
attempt := 0
for {
// Legal nodeport range is 30000-32767
nodePort = 30000 + state.rng.Intn(32767-30000+1)
if _, found := state.usedPorts[nodePort]; !found {
state.usedPorts[nodePort] = struct{}{}
break
}
attempt++
if attempt >= 100 {
return nil, fmt.Errorf("too many attempts trying to generate a unique NodePort number")
}
}
servicePort := v1.ServicePort{
Protocol: cp.Protocol,
Port: cp.ContainerPort,
NodePort: int32(nodePort),
Name: strconv.Itoa(int(cp.ContainerPort)),
TargetPort: intstr.Parse(strconv.Itoa(int(cp.ContainerPort))),
}
sps = append(sps, servicePort)
}
return sps, nil
}
// containersToServicePorts takes a slice of v1.Containers and generates an
// inclusive list of serviceports to expose
func containersToServicePorts(containers []v1.Container) ([]v1.ServicePort, error) {
state := newServicePortState()
sps := make([]v1.ServicePort, 0, len(containers))
for _, ctr := range containers {
ports, err := state.containerPortsToServicePorts(ctr.Ports)
if err != nil {
return nil, err
}
sps = append(sps, ports...)
}
return sps, nil
}
func (p *Pod) podWithContainers(ctx context.Context, containers []*Container, ports []v1.ContainerPort, hostNetwork, hostUsers, getService, podmanOnly bool, infraName string) (*v1.Pod, error) {
deDupPodVolumes := make(map[string]*v1.Volume)
first := true
podContainers := make([]v1.Container, 0, len(containers))
podInitCtrs := []v1.Container{}
podAnnotations := make(map[string]string)
dnsInfo := v1.PodDNSConfig{}
var (
hostname string
stopTimeout *uint
)
cfg, err := config.Default()
if err != nil {
return nil, err
}
// Let's sort the containers in order of created time
// This will ensure that the init containers are defined in the correct order in the kube yaml
sort.Slice(containers, func(i, j int) bool { return containers[i].CreatedTime().Before(containers[j].CreatedTime()) })
for _, ctr := range containers {
if ctr.IsInfra() {
// If there is an user namespace for the infra container, then register it for the entire pod.
if v, found := ctr.config.Spec.Annotations[define.UserNsAnnotation]; found {
podAnnotations[define.UserNsAnnotation] = v
}
_, _, infraDNS, _, err := containerToV1Container(ctx, ctr, getService)
if err != nil {
return nil, err
}
if infraDNS != nil {
if servers := infraDNS.Nameservers; len(servers) > 0 {
dnsInfo.Nameservers = servers
}
if searches := infraDNS.Searches; len(searches) > 0 {
dnsInfo.Searches = searches
}
if options := infraDNS.Options; len(options) > 0 {
dnsInfo.Options = options
}
}
// If the infraName is not the podID-infra, that means the user set another infra name using
// --infra-name during pod creation
if infraName != "" && infraName != p.ID()[:12]+"-infra" {
podAnnotations[define.InfraNameAnnotation] = infraName
}
} else {
for k, v := range ctr.config.Spec.Annotations {
if !podmanOnly && (define.IsReservedAnnotation(k)) {
continue
}
podAnnotations[fmt.Sprintf("%s/%s", k, removeUnderscores(ctr.Name()))] = v
}
// Convert auto-update labels into kube annotations
for k, v := range getAutoUpdateAnnotations(ctr.Name(), ctr.Labels()) {
podAnnotations[k] = v
}
isInit := ctr.IsInitCtr()
// Since hostname is only set at pod level, set the hostname to the hostname of the first container we encounter
if hostname == "" {
// Only set the hostname if it is not set to the truncated container ID, which we do by default if no
// hostname is specified for the container and if it is not set to the pod name.
if !strings.Contains(ctr.ID(), ctr.Hostname()) && ctr.Hostname() != p.Name() {
hostname = ctr.Hostname()
}
}
// Pick the first container that has a stop-timeout set and use that value
// Ignore podman's default
if ctr.config.StopTimeout != cfg.Engine.StopTimeout && stopTimeout == nil {
stopTimeout = &ctr.config.StopTimeout
}
ctr, volumes, _, annotations, err := containerToV1Container(ctx, ctr, getService)
if err != nil {
return nil, err
}
for k, v := range annotations {
podAnnotations[define.BindMountPrefix] = k + ":" + v
}
// Since port bindings for the pod are handled by the
// infra container, wipe them here only if we are sharing the net namespace
// If the network namespace is not being shared in the pod, then containers
// can have their own network configurations
if p.SharesNet() {
ctr.Ports = nil
// We add the original port declarations from the libpod infra container
// to the first kubernetes container description because otherwise we lose
// the original container/port bindings.
// Add the port configuration to the first regular container or the first
// init container if only init containers have been created in the pod.
if first && len(ports) > 0 && (!isInit || len(containers) == 2) {
ctr.Ports = ports
first = false
}
}
if isInit {
podInitCtrs = append(podInitCtrs, ctr)
continue
}
podContainers = append(podContainers, ctr)
// Deduplicate volumes, so if containers in the pod share a volume, it's only
// listed in the volumes section once
for _, vol := range volumes {
deDupPodVolumes[vol.Name] = &vol
}
}
}
podVolumes := []v1.Volume{}
for _, vol := range deDupPodVolumes {
podVolumes = append(podVolumes, *vol)
}
podName := removeUnderscores(p.Name())
return newPodObject(
podName,
podAnnotations,
podInitCtrs,
podContainers,
podVolumes,
&dnsInfo,
hostNetwork,
hostUsers,
hostname,
stopTimeout), nil
}
func newPodObject(podName string, annotations map[string]string, initCtrs, containers []v1.Container, volumes []v1.Volume, dnsOptions *v1.PodDNSConfig, hostNetwork, hostUsers bool, hostname string, stopTimeout *uint) *v1.Pod {
tm := v12.TypeMeta{
Kind: "Pod",
APIVersion: "v1",
}
// Add a label called "app" with the containers name as a value
labels := make(map[string]string)
labels["app"] = removeUnderscores(podName)
om := v12.ObjectMeta{
// The name of the pod is container_name-libpod
Name: podName,
Labels: labels,
// CreationTimestamp seems to be required, so adding it; in doing so, the timestamp
// will reflect time this is run (not container create time) because the conversion
// of the container create time to v1 Time is probably not warranted nor worthwhile.
CreationTimestamp: v12.Now(),
Annotations: annotations,
}
ps := v1.PodSpec{
Containers: containers,
Hostname: hostname,
HostNetwork: hostNetwork,
InitContainers: initCtrs,
Volumes: volumes,
}
if !hostUsers {
ps.HostUsers = &hostUsers
}
if dnsOptions != nil && (len(dnsOptions.Nameservers)+len(dnsOptions.Searches)+len(dnsOptions.Options) > 0) {
ps.DNSConfig = dnsOptions
}
if stopTimeout != nil {
terminationGracePeriod := int64(*stopTimeout)
ps.TerminationGracePeriodSeconds = &terminationGracePeriod
}
p := v1.Pod{
TypeMeta: tm,
ObjectMeta: om,
Spec: ps,
}
return &p
}
// simplePodWithV1Containers is a function used by inspect when kube yaml needs to be generated
// for a single container. we "insert" that container description in a pod.
func simplePodWithV1Containers(ctx context.Context, ctrs []*Container, getService, podmanOnly bool) (*v1.Pod, error) {
cfg, err := config.Default()
if err != nil {
return nil, err
}
kubeCtrs := make([]v1.Container, 0, len(ctrs))
kubeInitCtrs := []v1.Container{}
kubeVolumes := make([]v1.Volume, 0)
hostUsers := true
hostNetwork := true
podDNS := v1.PodDNSConfig{}
kubeAnnotations := make(map[string]string)
ctrNames := make([]string, 0, len(ctrs))
var (
hostname string
restartPolicy *string
stopTimeout *uint
)
for _, ctr := range ctrs {
ctrNames = append(ctrNames, removeUnderscores(ctr.Name()))
for k, v := range ctr.config.Spec.Annotations {
if !podmanOnly && define.IsReservedAnnotation(k) {
continue
}
kubeAnnotations[fmt.Sprintf("%s/%s", k, removeUnderscores(ctr.Name()))] = v
}
// Convert auto-update labels into kube annotations
for k, v := range getAutoUpdateAnnotations(ctr.Name(), ctr.Labels()) {
kubeAnnotations[k] = v
}
isInit := ctr.IsInitCtr()
// Since hostname is only set at pod level, set the hostname to the hostname of the first container we encounter
if hostname == "" {
// Only set the hostname if it is not set to the truncated container ID, which we do by default if no
// hostname is specified for the container
if !strings.Contains(ctr.ID(), ctr.Hostname()) {
hostname = ctr.Hostname()
}
}
// Pick the first container that has a stop-timeout set and use that value
// Ignore podman's default
if ctr.config.StopTimeout != cfg.Engine.StopTimeout && stopTimeout == nil {
stopTimeout = &ctr.config.StopTimeout
}
// Use the restart policy of the first non-init container
if !isInit && restartPolicy == nil {
restartPolicy = &ctr.config.RestartPolicy
}
if ctr.config.Spec.Process != nil {
var ulimitArr []string
defaultUlimits := cfg.Ulimits()
for _, ulimit := range ctr.config.Spec.Process.Rlimits {
finalUlimit := strings.ToLower(strings.ReplaceAll(ulimit.Type, "RLIMIT_", "")) + "=" + strconv.Itoa(int(ulimit.Soft)) + ":" + strconv.Itoa(int(ulimit.Hard))
// compare ulimit with default list so we don't add it twice
if slices.Contains(defaultUlimits, finalUlimit) {
continue
}
ulimitArr = append(ulimitArr, finalUlimit)
}
if len(ulimitArr) > 0 {
kubeAnnotations[define.UlimitAnnotation] = strings.Join(ulimitArr, ",")
}
}
if !ctr.HostNetwork() {
hostNetwork = false
}
if !(ctr.IDMappings().HostUIDMapping && ctr.IDMappings().HostGIDMapping) {
hostUsers = false
}
kubeCtr, kubeVols, ctrDNS, annotations, err := containerToV1Container(ctx, ctr, getService)
if err != nil {
return nil, err
}
for k, v := range annotations {
kubeAnnotations[define.BindMountPrefix] = k + ":" + v
}
if isInit {
kubeInitCtrs = append(kubeInitCtrs, kubeCtr)
} else {
kubeCtrs = append(kubeCtrs, kubeCtr)
}
kubeVolumes = append(kubeVolumes, kubeVols...)
// Combine DNS information in sum'd structure
if ctrDNS != nil {
// nameservers
if servers := ctrDNS.Nameservers; servers != nil {
if podDNS.Nameservers == nil {
podDNS.Nameservers = make([]string, 0)
}
for _, s := range servers {
if !slices.Contains(podDNS.Nameservers, s) { // only append if it does not exist
podDNS.Nameservers = append(podDNS.Nameservers, s)
}
}
}
// search domains
if domains := ctrDNS.Searches; domains != nil {
if podDNS.Searches == nil {
podDNS.Searches = make([]string, 0)
}
for _, d := range domains {
if !slices.Contains(podDNS.Searches, d) { // only append if it does not exist
podDNS.Searches = append(podDNS.Searches, d)
}
}
}
// dns options
if options := ctrDNS.Options; options != nil {
if podDNS.Options == nil {
podDNS.Options = make([]v1.PodDNSConfigOption, 0)
}
podDNS.Options = append(podDNS.Options, options...)
}
} // end if ctrDNS
}
podName := removeUnderscores(ctrs[0].Name())
// Check if the pod name and container name will end up conflicting
// Append -pod if so
if slices.Contains(ctrNames, podName) {
podName += "-pod"
}
pod := newPodObject(
podName,
kubeAnnotations,
kubeInitCtrs,
kubeCtrs,
kubeVolumes,
&podDNS,
hostNetwork,
hostUsers,
hostname,
stopTimeout)
// Set the pod's restart policy
policy := ""
if restartPolicy != nil {
policy = *restartPolicy
}
pod.Spec.RestartPolicy = getPodRestartPolicy(policy)
return pod, nil
}
// getPodRestartPolicy returns the pod restart policy to be set in the generated kube yaml
func getPodRestartPolicy(policy string) v1.RestartPolicy {
switch policy {
case define.RestartPolicyNo:
return v1.RestartPolicyNever
case define.RestartPolicyAlways:
return v1.RestartPolicyAlways
case define.RestartPolicyOnFailure:
return v1.RestartPolicyOnFailure
default: // some pod/ctr create from cmdline, such as "" - set it to "" and let k8s handle the defaults
return ""
}
}
// containerToV1Container converts information we know about a libpod container
// to a V1.Container specification.
func containerToV1Container(ctx context.Context, c *Container, getService bool) (v1.Container, []v1.Volume, *v1.PodDNSConfig, map[string]string, error) {
kubeContainer := v1.Container{}
kubeVolumes := []v1.Volume{}
annotations := make(map[string]string)
kubeSec, hasSecData, err := generateKubeSecurityContext(c)
if err != nil {
return kubeContainer, kubeVolumes, nil, annotations, err
}
// NOTE: a privileged container mounts all of /dev/*.
if !c.Privileged() && c.config.Spec.Linux != nil && len(c.config.Spec.Linux.Devices) > 0 {
// TODO Enable when we can support devices and their names
kubeContainer.VolumeDevices = generateKubeVolumeDeviceFromLinuxDevice(c.config.Spec.Linux.Devices)
return kubeContainer, kubeVolumes, nil, annotations, fmt.Errorf("linux devices: %w", define.ErrNotImplemented)
}
if len(c.config.UserVolumes) > 0 {
volumeMounts, volumes, localAnnotations, err := libpodMountsToKubeVolumeMounts(c)
if err != nil {
return kubeContainer, kubeVolumes, nil, nil, err
}
annotations = localAnnotations
kubeContainer.VolumeMounts = volumeMounts
kubeVolumes = append(kubeVolumes, volumes...)
}
portmappings, err := c.PortMappings()
if err != nil {
return kubeContainer, kubeVolumes, nil, annotations, err
}
ports, err := portMappingToContainerPort(portmappings, getService)
if err != nil {
return kubeContainer, kubeVolumes, nil, annotations, err
}
// Handle command and arguments.
if ep := c.Entrypoint(); len(ep) > 0 {
// If we have an entrypoint, set the container's command as
// arguments.
kubeContainer.Command = ep
kubeContainer.Args = c.Command()
} else {
kubeContainer.Command = c.Command()
}
kubeContainer.Name = removeUnderscores(c.Name())
_, image := c.Image()
// The infra container may have been created with an overlay root FS
// instead of an infra image. If so, set the imageto the default K8s
// pause one and make sure it's in the storage by pulling it down if
// missing.
if image == "" && c.IsInfra() {
image = c.runtime.config.Engine.InfraImage
if _, err := c.runtime.libimageRuntime.Pull(ctx, image, config.PullPolicyMissing, nil); err != nil {
return kubeContainer, nil, nil, nil, err
}
}
kubeContainer.Image = image
kubeContainer.Stdin = c.Stdin()
img, _, err := c.runtime.libimageRuntime.LookupImage(image, nil)
if err != nil {
return kubeContainer, kubeVolumes, nil, annotations, fmt.Errorf("looking up image %q of container %q: %w", image, c.ID(), err)
}
imgData, err := img.Inspect(ctx, nil)
if err != nil {
return kubeContainer, kubeVolumes, nil, annotations, err
}
// If the user doesn't set a command/entrypoint when creating the container with podman and
// is using the image command or entrypoint from the image, don't add it to the generated kube yaml
if reflect.DeepEqual(imgData.Config.Cmd, kubeContainer.Command) || reflect.DeepEqual(imgData.Config.Entrypoint, kubeContainer.Command) {
kubeContainer.Command = nil
}
if c.WorkingDir() != "/" && imgData.Config.WorkingDir != c.WorkingDir() {
kubeContainer.WorkingDir = c.WorkingDir()
}
if imgData.User == c.User() && hasSecData {
kubeSec.RunAsGroup, kubeSec.RunAsUser = nil, nil
}
// If the image has user set as a positive integer value, then set runAsNonRoot to true
// in the kube yaml
imgUserID, err := strconv.Atoi(imgData.User)
if err == nil && imgUserID > 0 {
trueBool := true
kubeSec.RunAsNonRoot = &trueBool
}