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dex/storage/kubernetes/storage.go
Chance Zibolski 9d7b0b59bd storage/kubernetes: Log before registering custom resources
Logging before attempting to make any connection to Kubernetes is useful when the connection hangs and dex is killed before it can log any errors.
2017-09-26 16:23:49 -07:00

555 lines
15 KiB
Go

package kubernetes
import (
"context"
"errors"
"fmt"
"strings"
"time"
"github.com/coreos/dex/storage"
"github.com/coreos/dex/storage/kubernetes/k8sapi"
"github.com/sirupsen/logrus"
)
const (
kindAuthCode = "AuthCode"
kindAuthRequest = "AuthRequest"
kindClient = "OAuth2Client"
kindRefreshToken = "RefreshToken"
kindKeys = "SigningKey"
kindPassword = "Password"
kindOfflineSessions = "OfflineSessions"
kindConnector = "Connector"
)
const (
resourceAuthCode = "authcodes"
resourceAuthRequest = "authrequests"
resourceClient = "oauth2clients"
resourceRefreshToken = "refreshtokens"
resourceKeys = "signingkeies" // Kubernetes attempts to pluralize.
resourcePassword = "passwords"
resourceOfflineSessions = "offlinesessionses" // Again attempts to pluralize.
resourceConnector = "connectors"
)
// Config values for the Kubernetes storage type.
type Config struct {
InCluster bool `json:"inCluster"`
KubeConfigFile string `json:"kubeConfigFile"`
UseTPR bool `json:"useTPR"` // Flag option to use TPRs instead of CRDs
}
// Open returns a storage using Kubernetes third party resource.
func (c *Config) Open(logger logrus.FieldLogger) (storage.Storage, error) {
cli, err := c.open(logger, false)
if err != nil {
return nil, err
}
return cli, nil
}
// open returns a kubernetes client, initializing the third party resources used
// by dex.
//
// errOnResources controls if errors creating the resources cause this method to return
// immediately (used during testing), or if the client will asynchronously retry.
func (c *Config) open(logger logrus.FieldLogger, errOnResources bool) (*client, error) {
if c.InCluster && (c.KubeConfigFile != "") {
return nil, errors.New("cannot specify both 'inCluster' and 'kubeConfigFile'")
}
if !c.InCluster && (c.KubeConfigFile == "") {
return nil, errors.New("must specify either 'inCluster' or 'kubeConfigFile'")
}
var (
cluster k8sapi.Cluster
user k8sapi.AuthInfo
namespace string
err error
)
if c.InCluster {
cluster, user, namespace, err = inClusterConfig()
} else {
cluster, user, namespace, err = loadKubeConfig(c.KubeConfigFile)
}
if err != nil {
return nil, err
}
cli, err := newClient(cluster, user, namespace, logger, c.UseTPR)
if err != nil {
return nil, fmt.Errorf("create client: %v", err)
}
ctx, cancel := context.WithCancel(context.Background())
logger.Info("creating custom Kubernetes resources")
if !cli.registerCustomResources(c.UseTPR) {
if errOnResources {
cancel()
return nil, fmt.Errorf("failed creating custom resources")
}
// Try to synchronously create the custom resources once. This doesn't mean
// they'll immediately be available, but ensures that the client will actually try
// once.
logger.Errorf("failed creating custom resources: %v", err)
go func() {
for {
if cli.registerCustomResources(c.UseTPR) {
return
}
select {
case <-ctx.Done():
return
case <-time.After(30 * time.Second):
}
}
}()
}
// If the client is closed, stop trying to create resources.
cli.cancel = cancel
return cli, nil
}
// registerCustomResources attempts to create the custom resources dex
// requires or identifies that they're already enabled. This function creates
// third party resources(TPRs) or custom resource definitions(CRDs) depending
// on the `useTPR` flag passed in as an argument.
// It logs all errors, returning true if the resources were created successfully.
//
// Creating a custom resource does not mean that they'll be immediately available.
//
// TODO(ericchiang): Provide an option to wait for the resources to actually
// be available.
func (cli *client) registerCustomResources(useTPR bool) (ok bool) {
ok = true
length := len(customResourceDefinitions)
if useTPR {
length = len(thirdPartyResources)
}
for i := 0; i < length; i++ {
var err error
var resourceName string
if useTPR {
r := thirdPartyResources[i]
err = cli.postResource("extensions/v1beta1", "", "thirdpartyresources", r)
resourceName = r.ObjectMeta.Name
} else {
r := customResourceDefinitions[i]
err = cli.postResource("apiextensions.k8s.io/v1beta1", "", "customresourcedefinitions", r)
resourceName = r.ObjectMeta.Name
}
if err != nil {
switch err {
case storage.ErrAlreadyExists:
cli.logger.Infof("custom resource already created %s", resourceName)
case storage.ErrNotFound:
cli.logger.Errorf("custom resources not found, please enable the respective API group")
ok = false
default:
cli.logger.Errorf("creating custom resource %s: %v", resourceName, err)
ok = false
}
continue
}
cli.logger.Errorf("create custom resource %s", resourceName)
}
return ok
}
func (cli *client) Close() error {
if cli.cancel != nil {
cli.cancel()
}
return nil
}
func (cli *client) CreateAuthRequest(a storage.AuthRequest) error {
return cli.post(resourceAuthRequest, cli.fromStorageAuthRequest(a))
}
func (cli *client) CreateClient(c storage.Client) error {
return cli.post(resourceClient, cli.fromStorageClient(c))
}
func (cli *client) CreateAuthCode(c storage.AuthCode) error {
return cli.post(resourceAuthCode, cli.fromStorageAuthCode(c))
}
func (cli *client) CreatePassword(p storage.Password) error {
return cli.post(resourcePassword, cli.fromStoragePassword(p))
}
func (cli *client) CreateRefresh(r storage.RefreshToken) error {
return cli.post(resourceRefreshToken, cli.fromStorageRefreshToken(r))
}
func (cli *client) CreateOfflineSessions(o storage.OfflineSessions) error {
return cli.post(resourceOfflineSessions, cli.fromStorageOfflineSessions(o))
}
func (cli *client) CreateConnector(c storage.Connector) error {
return cli.post(resourceConnector, cli.fromStorageConnector(c))
}
func (cli *client) GetAuthRequest(id string) (storage.AuthRequest, error) {
var req AuthRequest
if err := cli.get(resourceAuthRequest, id, &req); err != nil {
return storage.AuthRequest{}, err
}
return toStorageAuthRequest(req), nil
}
func (cli *client) GetAuthCode(id string) (storage.AuthCode, error) {
var code AuthCode
if err := cli.get(resourceAuthCode, id, &code); err != nil {
return storage.AuthCode{}, err
}
return toStorageAuthCode(code), nil
}
func (cli *client) GetClient(id string) (storage.Client, error) {
c, err := cli.getClient(id)
if err != nil {
return storage.Client{}, err
}
return toStorageClient(c), nil
}
func (cli *client) getClient(id string) (Client, error) {
var c Client
name := cli.idToName(id)
if err := cli.get(resourceClient, name, &c); err != nil {
return Client{}, err
}
if c.ID != id {
return Client{}, fmt.Errorf("get client: ID %q mapped to client with ID %q", id, c.ID)
}
return c, nil
}
func (cli *client) GetPassword(email string) (storage.Password, error) {
p, err := cli.getPassword(email)
if err != nil {
return storage.Password{}, err
}
return toStoragePassword(p), nil
}
func (cli *client) getPassword(email string) (Password, error) {
// TODO(ericchiang): Figure out whose job it is to lowercase emails.
email = strings.ToLower(email)
var p Password
name := cli.idToName(email)
if err := cli.get(resourcePassword, name, &p); err != nil {
return Password{}, err
}
if email != p.Email {
return Password{}, fmt.Errorf("get email: email %q mapped to password with email %q", email, p.Email)
}
return p, nil
}
func (cli *client) GetKeys() (storage.Keys, error) {
var keys Keys
if err := cli.get(resourceKeys, keysName, &keys); err != nil {
return storage.Keys{}, err
}
return toStorageKeys(keys), nil
}
func (cli *client) GetRefresh(id string) (storage.RefreshToken, error) {
r, err := cli.getRefreshToken(id)
if err != nil {
return storage.RefreshToken{}, err
}
return toStorageRefreshToken(r), nil
}
func (cli *client) getRefreshToken(id string) (r RefreshToken, err error) {
err = cli.get(resourceRefreshToken, id, &r)
return
}
func (cli *client) GetOfflineSessions(userID string, connID string) (storage.OfflineSessions, error) {
o, err := cli.getOfflineSessions(userID, connID)
if err != nil {
return storage.OfflineSessions{}, err
}
return toStorageOfflineSessions(o), nil
}
func (cli *client) getOfflineSessions(userID string, connID string) (o OfflineSessions, err error) {
name := cli.offlineTokenName(userID, connID)
if err = cli.get(resourceOfflineSessions, name, &o); err != nil {
return OfflineSessions{}, err
}
if userID != o.UserID || connID != o.ConnID {
return OfflineSessions{}, fmt.Errorf("get offline session: wrong session retrieved")
}
return o, nil
}
func (cli *client) GetConnector(id string) (storage.Connector, error) {
var c Connector
if err := cli.get(resourceConnector, id, &c); err != nil {
return storage.Connector{}, err
}
return toStorageConnector(c), nil
}
func (cli *client) ListClients() ([]storage.Client, error) {
return nil, errors.New("not implemented")
}
func (cli *client) ListRefreshTokens() ([]storage.RefreshToken, error) {
return nil, errors.New("not implemented")
}
func (cli *client) ListPasswords() (passwords []storage.Password, err error) {
var passwordList PasswordList
if err = cli.list(resourcePassword, &passwordList); err != nil {
return passwords, fmt.Errorf("failed to list passwords: %v", err)
}
for _, password := range passwordList.Passwords {
p := storage.Password{
Email: password.Email,
Hash: password.Hash,
Username: password.Username,
UserID: password.UserID,
}
passwords = append(passwords, p)
}
return
}
func (cli *client) ListConnectors() (connectors []storage.Connector, err error) {
var connectorList ConnectorList
if err = cli.list(resourceConnector, &connectorList); err != nil {
return connectors, fmt.Errorf("failed to list connectors: %v", err)
}
connectors = make([]storage.Connector, len(connectorList.Connectors))
for i, connector := range connectorList.Connectors {
connectors[i] = toStorageConnector(connector)
}
return
}
func (cli *client) DeleteAuthRequest(id string) error {
return cli.delete(resourceAuthRequest, id)
}
func (cli *client) DeleteAuthCode(code string) error {
return cli.delete(resourceAuthCode, code)
}
func (cli *client) DeleteClient(id string) error {
// Check for hash collition.
c, err := cli.getClient(id)
if err != nil {
return err
}
return cli.delete(resourceClient, c.ObjectMeta.Name)
}
func (cli *client) DeleteRefresh(id string) error {
return cli.delete(resourceRefreshToken, id)
}
func (cli *client) DeletePassword(email string) error {
// Check for hash collition.
p, err := cli.getPassword(email)
if err != nil {
return err
}
return cli.delete(resourcePassword, p.ObjectMeta.Name)
}
func (cli *client) DeleteOfflineSessions(userID string, connID string) error {
// Check for hash collition.
o, err := cli.getOfflineSessions(userID, connID)
if err != nil {
return err
}
return cli.delete(resourceOfflineSessions, o.ObjectMeta.Name)
}
func (cli *client) DeleteConnector(id string) error {
return cli.delete(resourceConnector, id)
}
func (cli *client) UpdateRefreshToken(id string, updater func(old storage.RefreshToken) (storage.RefreshToken, error)) error {
r, err := cli.getRefreshToken(id)
if err != nil {
return err
}
updated, err := updater(toStorageRefreshToken(r))
if err != nil {
return err
}
updated.ID = id
newToken := cli.fromStorageRefreshToken(updated)
newToken.ObjectMeta = r.ObjectMeta
return cli.put(resourceRefreshToken, r.ObjectMeta.Name, newToken)
}
func (cli *client) UpdateClient(id string, updater func(old storage.Client) (storage.Client, error)) error {
c, err := cli.getClient(id)
if err != nil {
return err
}
updated, err := updater(toStorageClient(c))
if err != nil {
return err
}
updated.ID = c.ID
newClient := cli.fromStorageClient(updated)
newClient.ObjectMeta = c.ObjectMeta
return cli.put(resourceClient, c.ObjectMeta.Name, newClient)
}
func (cli *client) UpdatePassword(email string, updater func(old storage.Password) (storage.Password, error)) error {
p, err := cli.getPassword(email)
if err != nil {
return err
}
updated, err := updater(toStoragePassword(p))
if err != nil {
return err
}
updated.Email = p.Email
newPassword := cli.fromStoragePassword(updated)
newPassword.ObjectMeta = p.ObjectMeta
return cli.put(resourcePassword, p.ObjectMeta.Name, newPassword)
}
func (cli *client) UpdateOfflineSessions(userID string, connID string, updater func(old storage.OfflineSessions) (storage.OfflineSessions, error)) error {
o, err := cli.getOfflineSessions(userID, connID)
if err != nil {
return err
}
updated, err := updater(toStorageOfflineSessions(o))
if err != nil {
return err
}
newOfflineSessions := cli.fromStorageOfflineSessions(updated)
newOfflineSessions.ObjectMeta = o.ObjectMeta
return cli.put(resourceOfflineSessions, o.ObjectMeta.Name, newOfflineSessions)
}
func (cli *client) UpdateKeys(updater func(old storage.Keys) (storage.Keys, error)) error {
firstUpdate := false
var keys Keys
if err := cli.get(resourceKeys, keysName, &keys); err != nil {
if err != storage.ErrNotFound {
return err
}
firstUpdate = true
}
var oldKeys storage.Keys
if !firstUpdate {
oldKeys = toStorageKeys(keys)
}
updated, err := updater(oldKeys)
if err != nil {
return err
}
newKeys := cli.fromStorageKeys(updated)
if firstUpdate {
return cli.post(resourceKeys, newKeys)
}
newKeys.ObjectMeta = keys.ObjectMeta
return cli.put(resourceKeys, keysName, newKeys)
}
func (cli *client) UpdateAuthRequest(id string, updater func(a storage.AuthRequest) (storage.AuthRequest, error)) error {
var req AuthRequest
err := cli.get(resourceAuthRequest, id, &req)
if err != nil {
return err
}
updated, err := updater(toStorageAuthRequest(req))
if err != nil {
return err
}
newReq := cli.fromStorageAuthRequest(updated)
newReq.ObjectMeta = req.ObjectMeta
return cli.put(resourceAuthRequest, id, newReq)
}
func (cli *client) UpdateConnector(id string, updater func(a storage.Connector) (storage.Connector, error)) error {
var c Connector
err := cli.get(resourceConnector, id, &c)
if err != nil {
return err
}
updated, err := updater(toStorageConnector(c))
if err != nil {
return err
}
newConn := cli.fromStorageConnector(updated)
newConn.ObjectMeta = c.ObjectMeta
return cli.put(resourceConnector, id, newConn)
}
func (cli *client) GarbageCollect(now time.Time) (result storage.GCResult, err error) {
var authRequests AuthRequestList
if err := cli.list(resourceAuthRequest, &authRequests); err != nil {
return result, fmt.Errorf("failed to list auth requests: %v", err)
}
var delErr error
for _, authRequest := range authRequests.AuthRequests {
if now.After(authRequest.Expiry) {
if err := cli.delete(resourceAuthRequest, authRequest.ObjectMeta.Name); err != nil {
cli.logger.Errorf("failed to delete auth request: %v", err)
delErr = fmt.Errorf("failed to delete auth request: %v", err)
}
result.AuthRequests++
}
}
if delErr != nil {
return result, delErr
}
var authCodes AuthCodeList
if err := cli.list(resourceAuthCode, &authCodes); err != nil {
return result, fmt.Errorf("failed to list auth codes: %v", err)
}
for _, authCode := range authCodes.AuthCodes {
if now.After(authCode.Expiry) {
if err := cli.delete(resourceAuthCode, authCode.ObjectMeta.Name); err != nil {
cli.logger.Errorf("failed to delete auth code %v", err)
delErr = fmt.Errorf("failed to delete auth code: %v", err)
}
result.AuthCodes++
}
}
return result, delErr
}