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types.go
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types.go
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package store
import (
"context"
"encoding/json"
"fmt"
"io/ioutil"
"os"
"path/filepath"
"strings"
"cloud.google.com/go/datastore"
"github.com/ghodss/yaml"
"k8s.io/helm/pkg/downloader"
"k8s.io/helm/pkg/getter"
"k8s.io/helm/pkg/helm"
"k8s.io/helm/pkg/helm/environment"
"k8s.io/helm/pkg/helm/helmpath"
rls "k8s.io/helm/pkg/proto/hapi/services"
"k8s.io/helm/pkg/strvals"
)
var client *helm.Client
func init() {
client = helm.NewClient(helm.Host(os.Getenv("TILLER_HOST")))
}
// Load satisfies the datastore.PropertyLoadSaver interface
func (r *Release) Load(p []datastore.Property) error {
if err := datastore.LoadStruct(r, p); err != nil {
return err
}
labels := map[string]string{}
err := json.Unmarshal(r.ReleaseLabels, &labels)
if err != nil {
return err
}
r.Labels = labels
return nil
}
// Save satisfies the datastore.PropertyLoadSaver interface
func (r *Release) Save() ([]datastore.Property, error) {
props, err := datastore.SaveStruct(r)
if err != nil {
return nil, err
}
response := []datastore.Property{}
// skip ReleaseLabels from datastore.SaveStruct()
for _, prop := range props {
if prop.Name == "ReleaseLabels" {
continue
}
response = append(response, prop)
}
labelBytes, err := json.Marshal(r.Labels)
if err != nil {
return nil, err
}
response = append(response, datastore.Property{
Name: "ReleaseLabels",
Value: labelBytes,
NoIndex: true,
})
return response, nil
}
// A Release contains metadata about a release of a healm chart
type Release struct {
UniqueID string `json:"unique_id" datastore:"uniqueID"`
Labels map[string]string `json:"labels" datastore:"-"`
ReleaseLabels []byte `json:"-" datastore:"labels,noindex"`
Name string `json:"name" datastore:"name,noindex"`
Chart string `json:"chart" datastore:"chart,noindex"`
Namespace string `json:"namespace" datastore:"namespace,noindex"`
Version string `json:"version" datastore:"version,noindex"`
Values string `json:"values" datastore:"values,noindex"`
}
func (r Release) String() string {
return fmt.Sprintf("%s\t%s\t%s\t%s", r.UniqueID, r.Name, r.Chart, r.Version)
}
// MatchesSelector checks if the specified release contains all the key/value pairs in it's Labels
func (r Release) MatchesSelector(selector map[string]string) bool {
if (r.Labels == nil || len(r.Labels) == 0) && len(selector) > 0 {
return false
}
for selectorK, selectorV := range selector {
labelValue, ok := r.Labels[selectorK]
if !ok || (strings.Compare(labelValue, selectorV) != 0 && len(selectorV) > 0) {
return false
}
}
return true
}
// ReleaseUnmarshaler is an interface for unmarshaling a release
type ReleaseUnmarshaler interface {
UnmarshalRelease(Release) error
}
// ReleaseMarshaler is an interface for marshaling a release
type ReleaseMarshaler interface {
MarshalRelease() (*Release, error)
}
// Upgrade sends an update to an existing release in a cluster
func (r Release) Upgrade(chartLocation string, dryRun bool, timeout int64) (*rls.UpdateReleaseResponse, error) {
return client.UpdateRelease(
r.Name,
chartLocation,
helm.UpdateValueOverrides([]byte(r.Values)),
helm.UpgradeDryRun(dryRun),
helm.UpgradeTimeout(timeout),
)
}
// Install creates an new release in a cluster
func (r Release) Install(chartLocation string, dryRun bool, timeout int64) (*rls.InstallReleaseResponse, error) {
return client.InstallRelease(
chartLocation,
r.Namespace,
helm.ValueOverrides([]byte(r.Values)),
helm.ReleaseName(r.Name),
helm.InstallDryRun(dryRun),
helm.InstallTimeout(timeout),
)
}
// Download gets the release from an index server
func (r Release) Download() (string, error) {
dl := downloader.ChartDownloader{
Out: os.Stdout,
HelmHome: helmpath.Home(os.Getenv("HELM_HOME")),
Getters: getter.All(environment.EnvSettings{}),
}
tmpDir, err := ioutil.TempDir("", "")
if err != nil {
return "", err
}
filename, _, err := dl.DownloadTo(r.Chart, r.Version, tmpDir)
if err == nil {
lname, err := filepath.Abs(filename)
if err != nil {
return filename, err
}
return lname, nil
}
return filename, fmt.Errorf("file %q not found: %s", r.Chart, err.Error())
}
// Get the release content from Tiller
func (r Release) Get() (*rls.GetReleaseContentResponse, error) {
return client.ReleaseContent(r.Name)
}
// MergeValues parses string values and then merges them into the
// existing Values for a release.
// Adopted from kubernetes/helm/cmd/helm/install.go
func (r *Release) MergeValues(values []string) error {
base := map[string]interface{}{}
if err := yaml.Unmarshal([]byte(r.Values), &base); err != nil {
return fmt.Errorf("Error parsing values for release %s: %s", r.Name, err)
}
// User specified a value via --set
for _, value := range values {
if err := strvals.ParseInto(value, base); err != nil {
return fmt.Errorf("failed parsing --set data: %s", err)
}
}
mergedValues, err := yaml.Marshal(base)
if err != nil {
return fmt.Errorf("Error parsing merged values for release %s: %s", r.Name, err)
}
r.Values = string(mergedValues)
return nil
}
// Releases is a slice of release
type Releases []Release
// ReleasesUnmarshaler is an interface for unmarshaling slices of release
type ReleasesUnmarshaler interface {
UnmarshalReleases(Releases) error
}
// ReleasesMarshaler is an interface for marshaling slices of release
type ReleasesMarshaler interface {
MarshalReleases() (Releases, error)
}
// A ReleaseStore is a backend that stores releases
type ReleaseStore interface {
Get(ctx context.Context, uniqueID string) (*Release, error)
Put(context.Context, Release) error
Delete(ctx context.Context, uniqueID string) error
List(ctx context.Context, selector map[string]string) (Releases, error)
Load(context.Context, Releases) error
Setup(context.Context) error
}