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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
podYAML *k8sAPI.Pod
err error
ctrs []*libpod.Container
servicePorts []k8sAPI.ServicePort
serviceYAML k8sAPI.Service
)
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)
if len(pods) > 1 {
return nil, errors.New("can only generate single pod at a time")
}
} 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 {
podYAML, servicePorts, err = pods[0].GenerateForKube()
} else {
podYAML, err = libpod.GenerateForKube(ctrs)
}
if err != nil {
return nil, err
}
if options.Service {
serviceYAML = libpod.GenerateKubeServiceFromV1Pod(podYAML, servicePorts)
}
content, err := generateKubeOutput(podYAML, &serviceYAML, options.Service)
if err != nil {
return nil, err
}
return &entities.GenerateKubeReport{Reader: bytes.NewReader(content)}, nil
}
func generateKubeOutput(podYAML *k8sAPI.Pod, serviceYAML *k8sAPI.Service, hasService bool) ([]byte, error) {
var (
output []byte
marshalledPod []byte
marshalledService []byte
err error
)
marshalledPod, err = yaml.Marshal(podYAML)
if err != nil {
return nil, err
}
if hasService {
marshalledService, err = yaml.Marshal(serviceYAML)
if err != nil {
return nil, err
}
}
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))...)
output = append(output, marshalledPod...)
if hasService {
output = append(output, []byte("---\n")...)
output = append(output, marshalledService...)
}
return output, nil
}
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