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chore(*) make kumactl install control-plane use Helm Charts
Signed-off-by: Nikolay Nikolaev <nikolay.nikolaev@konghq.com>
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Nikolay Nikolaev
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Aug 24, 2020
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,131 @@ | ||
| package install | ||
|
|
||
| import ( | ||
| "reflect" | ||
| "strings" | ||
|
|
||
| "github.com/pkg/errors" | ||
| "helm.sh/helm/v3/pkg/chart" | ||
| "helm.sh/helm/v3/pkg/chart/loader" | ||
| "helm.sh/helm/v3/pkg/chartutil" | ||
| "helm.sh/helm/v3/pkg/engine" | ||
|
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| "github.com/kumahq/kuma/app/kumactl/pkg/install/data" | ||
| ) | ||
|
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| func renderHelmFiles(templates []data.File, args interface{}) ([]data.File, error) { | ||
| loadedChart, err := loadCharts(templates) | ||
| if err != nil { | ||
| return nil, errors.Errorf("Failed to load charts: %s", err) | ||
| } | ||
|
|
||
| overrideValues := generateOverrideValues(args) | ||
| if err := chartutil.ProcessDependencies(loadedChart, overrideValues); err != nil { | ||
| return nil, errors.Errorf("Failed to process dependencies: %s", err) | ||
| } | ||
|
|
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| namespace := (overrideValues["Release"].(map[string]interface{}))["Namespace"].(string) | ||
| options := generateReleaseOptions(loadedChart.Metadata.Name, namespace) | ||
|
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| valuesToRender, err := chartutil.ToRenderValues(loadedChart, overrideValues, options, nil) | ||
| if err != nil { | ||
| return nil, errors.Errorf("Failed to render values: %s", err) | ||
| } | ||
|
|
||
| files, err := engine.Render(loadedChart, valuesToRender) | ||
| if err != nil { | ||
| return nil, errors.Errorf("Failed to render templates: %s", err) | ||
| } | ||
|
|
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| return postRender(loadedChart, files), nil | ||
| } | ||
|
|
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| func loadCharts(templates []data.File) (*chart.Chart, error) { | ||
| files := []*loader.BufferedFile{} | ||
| for _, f := range templates { | ||
| files = append(files, &loader.BufferedFile{ | ||
| Name: f.FullPath[1:], | ||
| Data: f.Data, | ||
| }) | ||
| } | ||
|
|
||
| loadedChart, err := loader.LoadFiles(files) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
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| // Filter out the pre- templates | ||
| loadedTemplates := loadedChart.Templates | ||
| loadedChart.Templates = []*chart.File{} | ||
|
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| for _, t := range loadedTemplates { | ||
| if !strings.HasPrefix(t.Name, "templates/pre-") { | ||
| loadedChart.Templates = append(loadedChart.Templates, &chart.File{ | ||
| Name: t.Name, | ||
| Data: t.Data, | ||
| }) | ||
| } | ||
| } | ||
|
|
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| return loadedChart, nil | ||
| } | ||
|
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| func generateOverrideValues(args interface{}) map[string]interface{} { | ||
| overrideValues := map[string]interface{}{} | ||
|
|
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| v := reflect.ValueOf(args) | ||
| t := v.Type() | ||
| for i := 0; i < t.NumField(); i++ { | ||
| name := t.Field(i).Name | ||
| value := v.FieldByName(name).Interface() | ||
|
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| splitName := strings.Split(name, "_") | ||
| len := len(splitName) | ||
|
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| root := overrideValues | ||
|
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| for i := 0; i < len-1; i++ { | ||
| n := splitName[i] | ||
|
|
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| if _, ok := root[n]; !ok { | ||
| root[n] = map[string]interface{}{} | ||
| } | ||
| root = root[n].(map[string]interface{}) | ||
| } | ||
| root[splitName[len-1]] = value | ||
| } | ||
|
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| return overrideValues | ||
| } | ||
|
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| func generateReleaseOptions(name, namespace string) chartutil.ReleaseOptions { | ||
| return chartutil.ReleaseOptions{ | ||
| Name: name, | ||
| Namespace: namespace, | ||
| Revision: 1, | ||
| IsInstall: true, | ||
| IsUpgrade: false, | ||
| } | ||
| } | ||
|
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| func postRender(loadedChart *chart.Chart, files map[string]string) []data.File { | ||
| result := []data.File{} | ||
|
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| for _, crd := range loadedChart.CRDObjects() { | ||
| result = append(result, data.File{ | ||
| Data: crd.File.Data, | ||
| Name: crd.Name, | ||
| }) | ||
| } | ||
|
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||
| for n, d := range files { | ||
| if strings.HasSuffix(n, "yaml") { | ||
| result = append(result, data.File{ | ||
| Data: []byte(d), | ||
| Name: n, | ||
| }) | ||
| } | ||
| } | ||
|
|
||
| return result | ||
| } |
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