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config_context.go
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config_context.go
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package template
import (
"encoding/base64"
"fmt"
"regexp"
"text/template"
"github.com/pkg/errors"
"github.com/replicatedhq/kots/pkg/crypto"
"github.com/replicatedhq/kots/pkg/docker/registry"
dockerregistrytypes "github.com/replicatedhq/kots/pkg/docker/registry/types"
"github.com/replicatedhq/kots/pkg/image"
"github.com/replicatedhq/kots/pkg/imageutil"
registrytypes "github.com/replicatedhq/kots/pkg/registry/types"
kotsv1beta1 "github.com/replicatedhq/kotskinds/apis/kots/v1beta1"
corev1 "k8s.io/api/core/v1"
)
var (
dockerImageNameRegex = regexp.MustCompile("(?:([^\\/]+)\\/)?(?:([^\\/]+)\\/)?([^@:\\/]+)(?:[@:](.+))")
)
type ItemValue struct {
Value interface{}
Default interface{}
Filename string
RepeatableItem string
}
func (i ItemValue) HasValue() bool {
if v, ok := i.Value.(string); ok {
return v != ""
}
return i.Value != nil
}
func (i ItemValue) ValueStr() string {
if i.HasValue() {
return fmt.Sprintf("%s", i.Value)
}
return ""
}
func (i ItemValue) HasDefault() bool {
if v, ok := i.Default.(string); ok {
return v != ""
}
return i.Default != nil
}
func (i ItemValue) DefaultStr() string {
if i.HasDefault() {
return fmt.Sprintf("%s", i.Default)
}
return ""
}
// ConfigCtx is the context for builder functions before the application has started.
type ConfigCtx struct {
ItemValues map[string]ItemValue
LocalRegistry registrytypes.RegistrySettings
DockerHubRegistry dockerregistrytypes.RegistryOptions
VersionInfo *VersionInfo
AppSlug string
DecryptValues bool
license *kotsv1beta1.License // Another agument for unifying all these contexts
app *kotsv1beta1.Application
}
// newConfigContext creates and returns a context for template rendering
func (b *Builder) newConfigContext(configGroups []kotsv1beta1.ConfigGroup, existingValues map[string]ItemValue, localRegistry registrytypes.RegistrySettings, license *kotsv1beta1.License, app *kotsv1beta1.Application, info *VersionInfo, dockerHubRegistry dockerregistrytypes.RegistryOptions, appSlug string, decryptValues bool) (*ConfigCtx, error) {
configCtx := &ConfigCtx{
ItemValues: existingValues,
LocalRegistry: localRegistry,
DockerHubRegistry: dockerHubRegistry,
VersionInfo: info,
AppSlug: appSlug,
license: license,
app: app,
DecryptValues: decryptValues,
}
builder := Builder{
Ctx: []Ctx{
configCtx,
StaticCtx{},
&licenseCtx{License: license, App: app, VersionInfo: info},
newKurlContext("base", "default"),
newVersionCtx(info),
},
}
configItemsByName := make(map[string]kotsv1beta1.ConfigItem)
for _, configGroup := range configGroups {
for _, configItem := range configGroup.Items {
configItemsByName[configItem.Name] = configItem
// decrypt password if it exists
if configItem.Type == "password" && configCtx.DecryptValues {
existingVal, ok := existingValues[configItem.Name]
if ok && existingVal.HasValue() {
val, err := decrypt(existingVal.ValueStr())
if err == nil {
existingVal.Value = val
existingValues[configItem.Name] = existingVal
}
}
}
}
}
deps := depGraph{}
err := deps.ParseConfigGroup(configGroups) // this updates the 'deps' object to include a dependency graph
if err != nil {
return nil, errors.Wrap(err, "generate config groups dep graph")
}
var headNodes []string
headNodes, err = deps.GetHeadNodes() // get the list of config items that do not depend on unresolved config items
for (len(headNodes) > 0) && (err == nil) {
deps.ResolveMissing(configItemsByName)
for _, node := range headNodes {
deps.ResolveDep(node)
configItem := configItemsByName[node]
// build "default"
builtDefault, _ := builder.String(configItem.Default.String())
if !isReadOnly(configItem) {
// if item is editable and the live state is valid, only apply the rendered default
// since that's not editable
i, ok := configCtx.ItemValues[node]
if ok {
itemValue := ItemValue{
Value: i.Value,
Default: builtDefault,
Filename: i.Filename,
}
configCtx.ItemValues[configItem.Name] = itemValue
continue
}
}
// build "value"
builtValue, _ := builder.String(configItem.Value.String())
builtFilename, _ := builder.String(configItem.Filename)
itemValue := ItemValue{
Value: builtValue,
Default: builtDefault,
Filename: builtFilename,
}
configCtx.ItemValues[configItem.Name] = itemValue
}
// update headNodes list for next loop iteration
headNodes, err = deps.GetHeadNodes()
}
if err != nil {
// dependencies could not be resolved for some reason
// return the empty config
// TODO: Better error messaging
return &ConfigCtx{}, err
}
return configCtx, nil
}
// FuncMap represents the available functions in the ConfigCtx.
func (ctx ConfigCtx) FuncMap() template.FuncMap {
return template.FuncMap{
"ConfigOption": ctx.configOption,
"ConfigOptionName": ctx.configOptionName,
"ConfigOptionIndex": ctx.configOptionIndex,
"ConfigOptionData": ctx.configOptionData,
"ConfigOptionFilename": ctx.configOptionFilename,
"ConfigOptionEquals": ctx.configOptionEquals,
"ConfigOptionNotEquals": ctx.configOptionNotEquals,
"LocalRegistryAddress": ctx.localRegistryAddress,
"LocalRegistryHost": ctx.localRegistryHost,
"LocalRegistryNamespace": ctx.localRegistryNamespace,
"LocalImageName": ctx.localImageName,
"LocalRegistryImagePullSecret": ctx.localRegistryImagePullSecret,
"ImagePullSecretName": ctx.imagePullSecretName,
"HasLocalRegistry": ctx.hasLocalRegistry,
}
}
// isReadOnly checks to see if it should be possible to edit a field
// for instance, it should not be possible to edit the value of a label
func isReadOnly(item kotsv1beta1.ConfigItem) bool {
if item.ReadOnly {
return true
}
// "" is an editable type because the default type is "text"
var EditableItemTypes = map[string]struct{}{
"": {},
"bool": {},
"file": {},
"password": {},
"select": {},
"select_many": {},
"select_one": {},
"text": {},
"textarea": {},
}
_, editable := EditableItemTypes[item.Type]
return !editable
}
func (ctx ConfigCtx) configOption(name string) string {
v, err := ctx.getConfigOptionValue(name)
if err != nil {
return ""
}
return v
}
func (ctx ConfigCtx) configOptionName(name string) string {
return name
}
func (ctx ConfigCtx) configOptionIndex(name string) string {
return ""
}
func (ctx ConfigCtx) configOptionData(name string) string {
v, err := ctx.getConfigOptionValue(name)
if err != nil {
return ""
}
decoded, err := base64.StdEncoding.DecodeString(v)
if err != nil {
return ""
}
return string(decoded)
}
func (ctx ConfigCtx) configOptionFilename(itemName string) string {
val, ok := ctx.ItemValues[itemName]
if !ok {
return ""
}
return val.Filename
}
func (ctx ConfigCtx) configOptionEquals(name string, value string) bool {
val, err := ctx.getConfigOptionValue(name)
if err != nil {
return false
}
return value == val
}
func (ctx ConfigCtx) configOptionNotEquals(name string, value string) bool {
val, err := ctx.getConfigOptionValue(name)
if err != nil {
return false
}
return value != val
}
func (ctx ConfigCtx) localRegistryAddress() string {
if ctx.LocalRegistry.Namespace == "" {
return ctx.LocalRegistry.Hostname
}
return fmt.Sprintf("%s/%s", ctx.LocalRegistry.Hostname, ctx.LocalRegistry.Namespace)
}
func (ctx ConfigCtx) localRegistryHost() string {
return ctx.LocalRegistry.Hostname
}
func (ctx ConfigCtx) localRegistryNamespace() string {
return ctx.LocalRegistry.Namespace
}
func (ctx ConfigCtx) localImageName(imageRef string) string {
// If there's a private registry. Always rewrite everything. This covers airgap installs too.
if ctx.LocalRegistry.Hostname != "" {
destRegistry := dockerregistrytypes.RegistryOptions{
Endpoint: ctx.localRegistryHost(),
Namespace: ctx.localRegistryNamespace(),
}
destImage, err := imageutil.DestImage(destRegistry, imageRef)
if err != nil {
// TODO: log
return ""
}
return destImage
}
// Not airgap and no local registry. Rewrite images that are private only.
if ctx.app == nil || !ctx.app.Spec.ProxyPublicImages {
isPrivate, err := image.IsPrivateImage(imageRef, ctx.DockerHubRegistry)
if err != nil {
// TODO: log
return ""
}
if !isPrivate {
return imageRef
}
}
installation := &kotsv1beta1.Installation{
Spec: InstallationSpecFromVersionInfo(ctx.VersionInfo),
}
registryProxyInfo := registry.GetRegistryProxyInfo(ctx.license, installation, ctx.app)
registryOptions := dockerregistrytypes.RegistryOptions{
Endpoint: registryProxyInfo.Registry,
ProxyEndpoint: registryProxyInfo.Proxy,
UpstreamEndpoint: registryProxyInfo.Upstream,
}
licenseAppSlug := ""
if ctx.license != nil {
licenseAppSlug = ctx.license.Spec.AppSlug
}
newImage, err := image.RewritePrivateImage(registryOptions, imageRef, licenseAppSlug)
if err != nil {
// TODO: log
return ""
}
return newImage
}
func (ctx ConfigCtx) hasLocalRegistry() bool {
return ctx.LocalRegistry.Hostname != ""
}
func (ctx ConfigCtx) localRegistryImagePullSecret() string {
var secret *corev1.Secret
if ctx.LocalRegistry.Hostname != "" {
secrets, err := registry.PullSecretForRegistries(
[]string{ctx.LocalRegistry.Hostname},
ctx.LocalRegistry.Username,
ctx.LocalRegistry.Password,
"default", // this value doesn't matter
ctx.AppSlug,
)
if err != nil {
return ""
}
secret = secrets.AppSecret
} else {
licenseIDString := ""
if ctx.license != nil {
licenseIDString = ctx.license.Spec.LicenseID
}
installation := &kotsv1beta1.Installation{
Spec: InstallationSpecFromVersionInfo(ctx.VersionInfo),
}
registryProxyInfo := registry.GetRegistryProxyInfo(ctx.license, installation, ctx.app)
secrets, err := registry.PullSecretForRegistries(
registryProxyInfo.ToSlice(),
licenseIDString,
licenseIDString,
"default", // this value doesn't matter
ctx.AppSlug,
)
if err != nil {
return ""
}
secret = secrets.AppSecret
}
dockerConfig, found := secret.Data[".dockerconfigjson"]
if !found {
return ""
}
return base64.StdEncoding.EncodeToString(dockerConfig)
}
func (ctx ConfigCtx) imagePullSecretName() string {
return registry.SecretNameFromPrefix(ctx.AppSlug)
}
func (ctx ConfigCtx) getConfigOptionValue(itemName string) (string, error) {
val, ok := ctx.ItemValues[itemName]
if !ok {
return "", errors.New("unable to find config item")
}
if val.HasValue() {
return val.ValueStr(), nil
}
return val.DefaultStr(), nil
}
func decrypt(input string) (string, error) {
decoded, err := base64.StdEncoding.DecodeString(input)
if err != nil {
return "", errors.Wrap(err, "failed to base64 decode")
}
decrypted, err := crypto.Decrypt(decoded)
if err != nil {
return "", errors.Wrap(err, "failed to decrypt")
}
return string(decrypted), nil
}