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write.go
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write.go
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package midstream
import (
"context"
"io/ioutil"
"os"
"path/filepath"
"github.com/pkg/errors"
kotsv1beta1 "github.com/replicatedhq/kots/kotskinds/apis/kots/v1beta1"
"github.com/replicatedhq/kots/pkg/disasterrecovery"
"github.com/replicatedhq/kots/pkg/k8sutil"
"github.com/replicatedhq/kots/pkg/template"
yaml "gopkg.in/yaml.v2"
corev1 "k8s.io/api/core/v1"
kustomizetypes "sigs.k8s.io/kustomize/api/types"
k8syaml "sigs.k8s.io/yaml"
)
const (
secretFilename = "secret.yaml"
patchesFilename = "pullsecrets.yaml"
disasterRecoveryLabelTransformerFileName = "backup-label-transformer.yaml"
)
type WriteOptions struct {
MidstreamDir string
BaseDir string
AppSlug string
IsGitOps bool
IsOpenShift bool
Builder template.Builder
HTTPProxyEnvValue string
HTTPSProxyEnvValue string
NoProxyEnvValue string
UseHelmInstall map[string]bool
NewHelmCharts []*kotsv1beta1.HelmChart
}
func (m *Midstream) WriteMidstream(options WriteOptions) error {
if err := os.MkdirAll(options.MidstreamDir, 0744); err != nil {
return errors.Wrap(err, "failed to mkdir")
}
existingKustomization, err := m.getExistingKustomization(options)
if err != nil {
return errors.Wrap(err, "get existing kustomization")
}
secretFilename, err := m.writePullSecret(options)
if err != nil {
return errors.Wrap(err, "failed to write secret")
}
if secretFilename != "" {
m.Kustomization.Resources = append(m.Kustomization.Resources, secretFilename)
}
identityBase, err := m.writeIdentityService(context.TODO(), options)
if err != nil {
return errors.Wrap(err, "failed to write identity service")
}
if identityBase != "" {
m.Kustomization.Resources = append(m.Kustomization.Resources, identityBase)
}
if err := m.writeObjectsWithPullSecret(options); err != nil {
return errors.Wrap(err, "failed to write patches")
}
// transformers
drLabelTransformerFilename, err := m.writeDisasterRecoveryLabelTransformer(options)
if err != nil {
return errors.Wrap(err, "failed to write disaster recovery label transformer")
}
m.Kustomization.Transformers = append(m.Kustomization.Transformers, drLabelTransformerFilename)
// annotations
if m.Kustomization.CommonAnnotations == nil {
m.Kustomization.CommonAnnotations = make(map[string]string)
}
m.Kustomization.CommonAnnotations["kots.io/app-slug"] = options.AppSlug
if existingKustomization != nil {
// Note that this function does nothing on the initial install
// if the user is not presented with the config screen.
m.mergeKustomization(options, *existingKustomization)
}
if err := m.writeKustomization(options); err != nil {
return errors.Wrap(err, "failed to write kustomization")
}
return nil
}
func (m *Midstream) getExistingKustomization(options WriteOptions) (*kustomizetypes.Kustomization, error) {
kustomizationFilename := filepath.Join(options.MidstreamDir, "kustomization.yaml")
_, err := os.Stat(kustomizationFilename)
if os.IsNotExist(err) {
return nil, nil
} else if err != nil {
return nil, errors.Wrap(err, "stat existing kustomization")
}
k, err := k8sutil.ReadKustomizationFromFile(kustomizationFilename)
if err != nil {
return nil, errors.Wrap(err, "load existing kustomization")
}
return k, nil
}
func (m *Midstream) mergeKustomization(options WriteOptions, existing kustomizetypes.Kustomization) {
existing.PatchesStrategicMerge = removeFromPatches(existing.PatchesStrategicMerge, patchesFilename)
m.Kustomization.PatchesStrategicMerge = uniquePatches(existing.PatchesStrategicMerge, m.Kustomization.PatchesStrategicMerge)
m.Kustomization.Resources = uniqueStrings(existing.Resources, m.Kustomization.Resources)
m.Kustomization.Transformers = uniqueStrings(existing.Transformers, m.Kustomization.Transformers)
// annotations
if existing.CommonAnnotations == nil {
existing.CommonAnnotations = make(map[string]string)
}
delete(existing.CommonAnnotations, "kots.io/app-sequence")
m.Kustomization.CommonAnnotations = mergeMaps(m.Kustomization.CommonAnnotations, existing.CommonAnnotations)
}
func removeFromPatches(patches []kustomizetypes.PatchStrategicMerge, filename string) []kustomizetypes.PatchStrategicMerge {
newPatches := []kustomizetypes.PatchStrategicMerge{}
for _, patch := range patches {
if string(patch) != filename {
newPatches = append(newPatches, patch)
}
}
return newPatches
}
func mergeMaps(new map[string]string, existing map[string]string) map[string]string {
merged := existing
if merged == nil {
merged = make(map[string]string)
}
for key, value := range new {
merged[key] = value
}
return merged
}
func (m *Midstream) writeKustomization(options WriteOptions) error {
relativeBaseDir, err := filepath.Rel(options.MidstreamDir, options.BaseDir)
if err != nil {
return errors.Wrap(err, "failed to determine relative path for base from midstream")
}
kustomizationFilename := filepath.Join(options.MidstreamDir, "kustomization.yaml")
m.Kustomization.Bases = []string{
relativeBaseDir,
}
if err := k8sutil.WriteKustomizationToFile(*m.Kustomization, kustomizationFilename); err != nil {
return errors.Wrap(err, "failed to write kustomization to file")
}
return nil
}
func (m *Midstream) writeDisasterRecoveryLabelTransformer(options WriteOptions) (string, error) {
additionalLabels := map[string]string{
"kots.io/app-slug": options.AppSlug,
}
drLabelTransformerYAML, err := disasterrecovery.GetLabelTransformerYAML(additionalLabels)
if err != nil {
return "", errors.Wrap(err, "failed to get disaster recovery label transformer yaml")
}
absFilename := filepath.Join(options.MidstreamDir, disasterRecoveryLabelTransformerFileName)
if err := ioutil.WriteFile(absFilename, drLabelTransformerYAML, 0644); err != nil {
return "", errors.Wrap(err, "failed to write disaster recovery label transformer yaml file")
}
return disasterRecoveryLabelTransformerFileName, nil
}
func (m *Midstream) writePullSecret(options WriteOptions) (string, error) {
var secretBytes []byte
if m.AppPullSecret != nil {
b, err := k8syaml.Marshal(m.AppPullSecret)
if err != nil {
return "", errors.Wrap(err, "failed to marshal app pull secret")
}
secretBytes = b
}
if m.AdminConsolePullSecret != nil {
if secretBytes != nil {
secretBytes = append(secretBytes, []byte("\n---\n")...)
}
b, err := k8syaml.Marshal(m.AdminConsolePullSecret)
if err != nil {
return "", errors.Wrap(err, "failed to marshal kots pull secret")
}
secretBytes = append(secretBytes, b...)
}
if m.DockerHubPullSecret != nil {
if secretBytes != nil {
secretBytes = append(secretBytes, []byte("\n---\n")...)
}
b, err := k8syaml.Marshal(m.DockerHubPullSecret)
if err != nil {
return "", errors.Wrap(err, "failed to marshal kots pull secret")
}
secretBytes = append(secretBytes, b...)
}
if secretBytes == nil {
return "", nil
}
absFilename := filepath.Join(options.MidstreamDir, secretFilename)
if err := ioutil.WriteFile(absFilename, secretBytes, 0644); err != nil {
return "", errors.Wrap(err, "failed to write pull secret file")
}
return secretFilename, nil
}
func (m *Midstream) writeObjectsWithPullSecret(options WriteOptions) error {
filename := filepath.Join(options.MidstreamDir, patchesFilename)
if len(m.DocForPatches) == 0 {
err := os.Remove(filename)
if err != nil && !os.IsNotExist(err) {
return errors.Wrap(err, "failed to delete pull secret patches")
}
return nil
}
f, err := os.Create(filename)
if err != nil {
return errors.Wrap(err, "failed to create resources file")
}
defer f.Close()
secrets := []*corev1.Secret{}
if m.AppPullSecret != nil {
secrets = append(secrets, m.AppPullSecret)
}
if m.DockerHubPullSecret != nil {
secrets = append(secrets, m.DockerHubPullSecret)
}
for _, o := range m.DocForPatches {
for _, secret := range secrets {
withPullSecret := o.PatchWithPullSecret(secret)
if withPullSecret == nil {
continue
}
b, err := yaml.Marshal(withPullSecret)
if err != nil {
return errors.Wrap(err, "failed to marshal object")
}
if _, err := f.Write([]byte("---\n")); err != nil {
return errors.Wrap(err, "failed to write doc separator")
}
if _, err := f.Write(b); err != nil {
return errors.Wrap(err, "failed to write object")
}
}
}
m.Kustomization.PatchesStrategicMerge = append(m.Kustomization.PatchesStrategicMerge, patchesFilename)
return nil
}
func EnsureDisasterRecoveryLabelTransformer(archiveDir string, additionalLabels map[string]string) error {
labelTransformerExists := false
dirPath := filepath.Join(archiveDir, "overlays", "midstream")
// TODO (ch35027): this will not work with multiple kustomization files
k, err := k8sutil.ReadKustomizationFromFile(filepath.Join(dirPath, "kustomization.yaml"))
if err != nil {
return errors.Wrap(err, "failed to read kustomization file from midstream")
}
for _, transformer := range k.Transformers {
if transformer == disasterRecoveryLabelTransformerFileName {
labelTransformerExists = true
break
}
}
if !labelTransformerExists {
drLabelTransformerYAML, err := disasterrecovery.GetLabelTransformerYAML(additionalLabels)
if err != nil {
return errors.Wrap(err, "failed to get disaster recovery label transformer yaml")
}
absFilename := filepath.Join(dirPath, disasterRecoveryLabelTransformerFileName)
if err := ioutil.WriteFile(absFilename, drLabelTransformerYAML, 0644); err != nil {
return errors.Wrap(err, "failed to write disaster recovery label transformer yaml file")
}
k.Transformers = append(k.Transformers, disasterRecoveryLabelTransformerFileName)
if err := k8sutil.WriteKustomizationToFile(*k, filepath.Join(dirPath, "kustomization.yaml")); err != nil {
return errors.Wrap(err, "failed to write kustomization file to midstream")
}
}
return nil
}