backend

package
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 Go to latest Published: Apr 26, 2019 License: Apache-2.0 Imports: 7 Imported by: 15

Documentation

Overview

Copyright 2015 Gravitational, Inc.

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at 

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

backend package allows for pluggable back-ends for secrets storage. To implement a new storage back-end you have to supply an object which:

  • implements backend.Backend interface
  • implements backend.NewFunc function

Index

Constants

View Source 
const (
	Forever         time.Duration = 0
	MaxLockDuration time.Duration = time.Minute
)

Forever means that object TTL will not expire unless deleted

Variables

This section is empty.

Functions

func AnyTTL 

func AnyTTL(clock clockwork.Clock, times ...time.Time) time.Duration

AnyTTL returns TTL if any of the suplied times pass expiry time otherwise returns forever

func TTL 

func TTL(clock clockwork.Clock, t time.Time) time.Duration

TTL converts time to TTL from current time supplied by provider, if t is zero, returns forever

func ValidateLockTTL 

func ValidateLockTTL(ttl time.Duration) error

ValidateLockTTL helper allows all backends to validate lock TTL parameter

Types

type Backend 

type Backend interface {
	// GetKeys returns a list of keys for a given path
	GetKeys(bucket []string, opts ...OpOption) ([]string, error)
	// GetItems returns a list of items (key value pairs) for a bucket.
	GetItems(bucket []string, opts ...OpOption) ([]Item, error)
	// CreateVal creates value with a given TTL and key in the bucket
	// if the value already exists, it must return trace.AlreadyExistsError
	CreateVal(bucket []string, key string, val []byte, ttl time.Duration) error
	// UpsertVal updates or inserts value with a given TTL into a bucket
	// ForeverTTL for no TTL
	UpsertVal(bucket []string, key string, val []byte, ttl time.Duration) error
	// UpsertItems updates or inserts all passed in backend.Items (with a TTL)
	// into the given bucket.
	UpsertItems(bucket []string, items []Item) error
	// GetVal return a value for a given key in the bucket
	GetVal(path []string, key string) ([]byte, error)
	// CompareAndSwapVal compares and swaps values in atomic operation,
	// succeeds if prevVal matches the value stored in the database,
	// requires prevVal as a non-empty value. Returns trace.CompareFailed
	// in case if value did not match.
	CompareAndSwapVal(bucket []string, key string, val []byte, prevVal []byte, ttl time.Duration) error
	// DeleteKey deletes a key in a bucket
	DeleteKey(bucket []string, key string) error
	// DeleteBucket deletes the bucket by a given path
	DeleteBucket(path []string, bkt string) error
	// AcquireLock grabs a lock that will be released automatically in TTL
	AcquireLock(token string, ttl time.Duration) error
	// ReleaseLock forces lock release before TTL
	ReleaseLock(token string) error
	// Close releases the resources taken up by this backend
	Close() error
	// Clock returns clock used by this backend
	Clock() clockwork.Clock
}

Backend implements abstraction over local or remote storage backend

Storage is modeled after BoltDB:

  • bucket is a slice []string{"a", "b"}
  • buckets contain key value pairs

type Config added in v1.2.6 

type Config struct {
	// Type can be "bolt" or "etcd" or "dynamodb"
	Type string `yaml:"type,omitempty"`

	// Params is a generic key/value property bag which allows arbitrary
	// falues to be passed to backend
	Params Params `yaml:",inline"`
}

Config is used for 'storage' config section. It's a combination of values for various backends: 'boltdb', 'etcd', 'filesystem' and 'dynamodb'

type Item 

type Item struct {
	// FullPath is set to full path
	FullPath string
	// Key is an item key.
	Key string
	// Value is an item value.
	Value []byte
	// TTL is the expire time for the item.
	TTL time.Duration
}

Item is a pair of key and value.

type Items 

type Items []Item

func (Items) Len 

func (it Items) Len() int

Len is part of sort.Interface.

func (Items) Less 

func (it Items) Less(i, j int) bool

Less is part of sort.Interface.

func (Items) Swap 

func (it Items) Swap(i, j int)

Swap is part of sort.Interface.

type JSONCodec 

type JSONCodec struct {
	Backend
}

func (*JSONCodec) CreateJSONVal added in v1.0.0 

func (c *JSONCodec) CreateJSONVal(path []string, key string, val interface{}, ttl time.Duration) error

func (*JSONCodec) GetJSONVal 

func (c *JSONCodec) GetJSONVal(path []string, key string, val interface{}) error

func (*JSONCodec) UpsertJSONVal 

func (c *JSONCodec) UpsertJSONVal(path []string, key string, val interface{}, ttl time.Duration) error

type NameFunc 

type NameFunc func() string

NameFunc type defines a function type which every backend must implement to return its name

type NewFunc 

type NewFunc func(Params) (Backend, error)

NewFunc type defines a function type which every backend must implement to instantiate itself

type OpConfig 

type OpConfig struct {
	// Recursive triggers recursive get.
	Recursive bool

	// KeysOnly fetches only keys.
	KeysOnly bool

	// DeduplicateByKey removes duplicates based off key instead of the full path.
	// Used for certain resources like users.
	DeduplicateByKey bool
}

OpConfig contains operation config

func CollectOptions 

func CollectOptions(opts []OpOption) (*OpConfig, error)

CollectOptions collects all options from functional arg and returns config

type OpOption 

type OpOption func(*OpConfig) error

OpOption is operation functional argument

func WithDeduplicateByKey 

func WithDeduplicateByKey() OpOption

DeduplicateByKey removes duplicates based off key instead of the full path.

func WithRecursive 

func WithRecursive() OpOption

WithRecursive sets get operation to be recursive

type Params 

type Params map[string]interface{}

backend.Params type defines a flexible unified back-end configuration API. It is just a map of key/value pairs which gets populated by `storage` section in Teleport YAML config.

func (Params) GetString 

func (p Params) GetString(key string) string

GetString returns a string value stored in Params map, or an empty string if nothing is found

type Sanitizer 

type Sanitizer struct {
	// contains filtered or unexported fields
}

Sanitizer wraps a Backend implementation to make sure all values requested of the backend are whitelisted.

func NewSanitizer 

func NewSanitizer(backend Backend) *Sanitizer

NewSanitizer returns a new Sanitizer.

func (*Sanitizer) AcquireLock 

func (s *Sanitizer) AcquireLock(token string, ttl time.Duration) error

AcquireLock grabs a lock that will be released automatically after a TTL.

func (*Sanitizer) Backend 

func (s *Sanitizer) Backend() Backend

Backend returns the underlying backend. Useful when knowing the type of backend is important (for example, can the backend support forking).

func (*Sanitizer) Clock 

func (s *Sanitizer) Clock() clockwork.Clock

Clock returns clock used by this backend

func (*Sanitizer) Close 

func (s *Sanitizer) Close() error

Close releases the resources taken up by this backend

func (*Sanitizer) CompareAndSwapVal 

func (s *Sanitizer) CompareAndSwapVal(bucket []string, key string, val []byte, prevVal []byte, ttl time.Duration) error

CompareAndSwapVal compares and swaps values in atomic operation, succeeds if prevVal matches the value stored in the database, requires prevVal as a non-empty value. Returns trace.CompareFailed in case if value did not match.

func (*Sanitizer) CreateVal 

func (s *Sanitizer) CreateVal(bucket []string, key string, val []byte, ttl time.Duration) error

CreateVal creates value with a given TTL and key in the bucket. If the value already exists, returns trace.AlreadyExistsError.

func (*Sanitizer) DeleteBucket 

func (s *Sanitizer) DeleteBucket(path []string, bucket string) error

DeleteBucket deletes the bucket by a given path.

func (*Sanitizer) DeleteKey 

func (s *Sanitizer) DeleteKey(bucket []string, key string) error

DeleteKey deletes a key in a bucket.

func (*Sanitizer) GetItems 

func (s *Sanitizer) GetItems(bucket []string, opts ...OpOption) ([]Item, error)

GetItems returns a list of items (key value pairs) for a bucket.

func (*Sanitizer) GetKeys 

func (s *Sanitizer) GetKeys(bucket []string, opts ...OpOption) ([]string, error)

GetKeys returns a list of keys for a given path.

func (*Sanitizer) GetVal 

func (s *Sanitizer) GetVal(bucket []string, key string) ([]byte, error)

GetVal returns a value for a given key in the bucket.

func (*Sanitizer) ReleaseLock 

func (s *Sanitizer) ReleaseLock(token string) error

ReleaseLock forces lock release before the TTL has expired.

func (*Sanitizer) UpsertItems 

func (s *Sanitizer) UpsertItems(bucket []string, items []Item) error

UpsertItems updates or inserts all passed in backend.Items (with a TTL) into the given bucket.

func (*Sanitizer) UpsertVal 

func (s *Sanitizer) UpsertVal(bucket []string, key string, val []byte, ttl time.Duration) error

UpsertVal updates or inserts value with a given TTL into a bucket. Use backend.ForeverTTL for no TTL.

Source Files

View all Source files

Directories

Path Synopsis
Package boltbk implements BoltDB backed backend for standalone instances This is a legacy backend which only exists for backward compatibility purposes
 Package boltbk implements BoltDB backed backend for standalone instances This is a legacy backend which only exists for backward compatibility purposes
dir package implements backend.Backend interface using the filesystem.
 dir package implements backend.Backend interface using the filesystem.
Package dynamodbDynamoDBBackend implements DynamoDB storage backend for Teleport auth service, similar to etcd backend.
 Package dynamodbDynamoDBBackend implements DynamoDB storage backend for Teleport auth service, similar to etcd backend.
Package etcdbk implements Etcd powered backend
 Package etcdbk implements Etcd powered backend
Package test contains a backend acceptance test suite that is backend implementation independent each backend will use the suite to test itself
 Package test contains a backend acceptance test suite that is backend implementation independent each backend will use the suite to test itself

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