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helm.go
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helm.go
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package executables
import (
"context"
"fmt"
"strings"
"sigs.k8s.io/yaml"
"github.com/aws/eks-anywhere/pkg/logger"
"github.com/aws/eks-anywhere/pkg/registrymirror"
)
const (
helmPath = "helm"
insecureSkipVerifyFlag = "--insecure-skip-tls-verify"
)
type Helm struct {
executable Executable
registryMirror *registrymirror.RegistryMirror
env map[string]string
insecure bool
}
type HelmOpt func(*Helm)
// WithRegistryMirror sets up registry mirror for helm.
func WithRegistryMirror(mirror *registrymirror.RegistryMirror) HelmOpt {
return func(h *Helm) {
h.registryMirror = mirror
}
}
func WithInsecure() HelmOpt {
return func(h *Helm) {
h.insecure = true
}
}
// join the default and the provided maps together.
func WithEnv(env map[string]string) HelmOpt {
return func(h *Helm) {
for k, v := range env {
h.env[k] = v
}
}
}
func NewHelm(executable Executable, opts ...HelmOpt) *Helm {
h := &Helm{
executable: executable,
env: map[string]string{
"HELM_EXPERIMENTAL_OCI": "1",
},
insecure: false,
}
for _, o := range opts {
o(h)
}
return h
}
func (h *Helm) Template(ctx context.Context, ociURI, version, namespace string, values interface{}, kubeVersion string) ([]byte, error) {
valuesYaml, err := yaml.Marshal(values)
if err != nil {
return nil, fmt.Errorf("failed marshalling values for helm template: %v", err)
}
params := []string{"template", h.url(ociURI), "--version", version, "--namespace", namespace, "--kube-version", kubeVersion}
params = h.addInsecureFlagIfProvided(params)
params = append(params, "-f", "-")
result, err := h.executable.Command(ctx, params...).WithStdIn(valuesYaml).WithEnvVars(h.env).Run()
if err != nil {
return nil, err
}
return result.Bytes(), nil
}
func (h *Helm) PullChart(ctx context.Context, ociURI, version string) error {
params := []string{"pull", h.url(ociURI), "--version", version}
params = h.addInsecureFlagIfProvided(params)
_, err := h.executable.Command(ctx, params...).
WithEnvVars(h.env).Run()
return err
}
func (h *Helm) PushChart(ctx context.Context, chart, registry string) error {
logger.Info("Pushing", "chart", chart)
params := []string{"push", chart, registry}
params = h.addInsecureFlagIfProvided(params)
_, err := h.executable.Command(ctx, params...).WithEnvVars(h.env).Run()
return err
}
func (h *Helm) RegistryLogin(ctx context.Context, registry, username, password string) error {
logger.Info("Logging in to helm registry", "registry", registry)
params := []string{"registry", "login", registry, "--username", username, "--password", password}
if h.insecure {
params = append(params, "--insecure")
}
_, err := h.executable.Command(ctx, params...).WithEnvVars(h.env).Run()
return err
}
func (h *Helm) SaveChart(ctx context.Context, ociURI, version, folder string) error {
params := []string{"pull", h.url(ociURI), "--version", version, "--destination", folder}
params = h.addInsecureFlagIfProvided(params)
_, err := h.executable.Command(ctx, params...).
WithEnvVars(h.env).Run()
return err
}
func (h *Helm) InstallChartFromName(ctx context.Context, ociURI, kubeConfig, name, version string) error {
params := []string{"install", name, ociURI, "--version", version, "--kubeconfig", kubeConfig}
params = h.addInsecureFlagIfProvided(params)
_, err := h.executable.Command(ctx, params...).
WithEnvVars(h.env).Run()
return err
}
func (h *Helm) InstallChart(ctx context.Context, chart, ociURI, version, kubeconfigFilePath, namespace string, values []string) error {
valueArgs := GetHelmValueArgs(values)
params := []string{"install", chart, ociURI, "--version", version}
params = append(params, valueArgs...)
params = append(params, "--kubeconfig", kubeconfigFilePath)
if len(namespace) > 0 {
params = append(params, "--create-namespace", "--namespace", namespace)
}
params = h.addInsecureFlagIfProvided(params)
logger.Info("Installing helm chart on cluster", "chart", chart, "version", version)
_, err := h.executable.Command(ctx, params...).WithEnvVars(h.env).Run()
return err
}
// InstallChartWithValuesFile installs a helm chart with the provided values file and waits for the chart deployment to be ready
// The default timeout for the chart to reach ready state is 5m.
func (h *Helm) InstallChartWithValuesFile(ctx context.Context, chart, ociURI, version, kubeconfigFilePath, valuesFilePath string) error {
params := []string{"install", chart, ociURI, "--version", version, "--values", valuesFilePath, "--kubeconfig", kubeconfigFilePath, "--wait"}
params = h.addInsecureFlagIfProvided(params)
_, err := h.executable.Command(ctx, params...).WithEnvVars(h.env).Run()
return err
}
func (h *Helm) ListCharts(ctx context.Context, kubeconfigFilePath string) ([]string, error) {
params := []string{"list", "-q", "--kubeconfig", kubeconfigFilePath}
out, err := h.executable.Command(ctx, params...).WithEnvVars(h.env).Run()
if err != nil {
return nil, err
}
charts := strings.FieldsFunc(out.String(), func(c rune) bool {
return c == '\n'
})
return charts, nil
}
func (h *Helm) addInsecureFlagIfProvided(params []string) []string {
if h.insecure {
return append(params, insecureSkipVerifyFlag)
}
return params
}
func (h *Helm) url(originalURL string) string {
return h.registryMirror.ReplaceRegistry(originalURL)
}
func GetHelmValueArgs(values []string) []string {
valueArgs := []string{}
for _, value := range values {
valueArgs = append(valueArgs, "--set", value)
}
return valueArgs
}