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package abi
import (
"bytes"
"context"
"fmt"
"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/systemd/generate"
"github.com/ghodss/yaml"
"github.com/pkg/errors"
k8sAPI "k8s.io/api/core/v1"
)
func (ic *ContainerEngine) GenerateSystemd(ctx context.Context, nameOrID string, options entities.GenerateSystemdOptions) (*entities.GenerateSystemdReport, error) {
// First assume it's a container.
ctr, ctrErr := ic.Libpod.LookupContainer(nameOrID)
if ctrErr == nil {
// Generate the unit for the container.
name, content, err := generate.ContainerUnit(ctr, options)
if err != nil {
return nil, err
}
return &entities.GenerateSystemdReport{Units: map[string]string{name: content}}, nil
}
// If it's not a container, we either have a pod or garbage.
pod, err := ic.Libpod.LookupPod(nameOrID)
if err != nil {
err = errors.Wrap(ctrErr, err.Error())
return nil, errors.Wrapf(err, "%s does not refer to a container or pod", nameOrID)
}
// Generate the units for the pod and all its containers.
units, err := generate.PodUnits(pod, options)
if err != nil {
return nil, err
}
return &entities.GenerateSystemdReport{Units: units}, nil
}
func (ic *ContainerEngine) GenerateKube(ctx context.Context, nameOrIDs []string, options entities.GenerateKubeOptions) (*entities.GenerateKubeReport, error) {
var (
pods []*libpod.Pod
ctrs []*libpod.Container
kubePods []*k8sAPI.Pod
kubeServices []k8sAPI.Service
content []byte
)
for _, nameOrID := range nameOrIDs {
// Get the container in question
ctr, err := ic.Libpod.LookupContainer(nameOrID)
if err != nil {
pod, err := ic.Libpod.LookupPod(nameOrID)
if err != nil {
return nil, err
}
pods = append(pods, pod)
} else {
if len(ctr.Dependencies()) > 0 {
return nil, errors.Wrapf(define.ErrNotImplemented, "containers with dependencies")
}
// we cannot deal with ctrs already in a pod
if len(ctr.PodID()) > 0 {
return nil, errors.Errorf("container %s is associated with pod %s: use generate on the pod itself", ctr.ID(), ctr.PodID())
}
ctrs = append(ctrs, ctr)
}
}
// check our inputs
if len(pods) > 0 && len(ctrs) > 0 {
return nil, errors.New("cannot generate pods and containers at the same time")
}
if len(pods) >= 1 {
pos, svcs, err := getKubePods(pods, options.Service)
if err != nil {
return nil, err
}
kubePods = append(kubePods, pos...)
if options.Service {
kubeServices = append(kubeServices, svcs...)
}
} else {
po, err := libpod.GenerateForKube(ctrs)
if err != nil {
return nil, err
}
kubePods = append(kubePods, po)
if options.Service {
kubeServices = append(kubeServices, libpod.GenerateKubeServiceFromV1Pod(po, []k8sAPI.ServicePort{}))
}
}
content, err := generateKubeOutput(kubePods, kubeServices, options.Service)
if err != nil {
return nil, err
}
return &entities.GenerateKubeReport{Reader: bytes.NewReader(content)}, nil
}
func getKubePods(pods []*libpod.Pod, getService bool) ([]*k8sAPI.Pod, []k8sAPI.Service, error) {
kubePods := make([]*k8sAPI.Pod, 0)
kubeServices := make([]k8sAPI.Service, 0)
for _, p := range pods {
po, svc, err := p.GenerateForKube()
if err != nil {
return nil, nil, err
}
kubePods = append(kubePods, po)
if getService {
kubeServices = append(kubeServices, libpod.GenerateKubeServiceFromV1Pod(po, svc))
}
}
return kubePods, kubeServices, nil
}
func generateKubeOutput(kubePods []*k8sAPI.Pod, kubeServices []k8sAPI.Service, hasService bool) ([]byte, error) {
output := make([]byte, 0)
marshalledPods := make([]byte, 0)
marshalledServices := make([]byte, 0)
for i, p := range kubePods {
if i != 0 {
marshalledPods = append(marshalledPods, []byte("---\n")...)
}
b, err := yaml.Marshal(p)
if err != nil {
return nil, err
}
marshalledPods = append(marshalledPods, b...)
}
if hasService {
for i, s := range kubeServices {
if i != 0 {
marshalledServices = append(marshalledServices, []byte("---\n")...)
}
b, err := yaml.Marshal(s)
if err != nil {
return nil, err
}
marshalledServices = append(marshalledServices, b...)
}
}
header := `# Generation of Kubernetes YAML is still under development!
#
# Save the output of this file and use kubectl create -f to import
# it into Kubernetes.
#
# Created with podman-%s
`
podmanVersion, err := define.GetVersion()
if err != nil {
return nil, err
}
output = append(output, []byte(fmt.Sprintf(header, podmanVersion.Version))...)
// kube generate order is based on helm install order (service, pod...)
if hasService {
output = append(output, marshalledServices...)
output = append(output, []byte("---\n")...)
}
output = append(output, marshalledPods...)
return output, nil
}
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