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replace libkv with local fork

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Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
This commit is contained in:
Sebastiaan van Stijn 2023-06-26 17:54:28 +02:00
parent 5d25143ef3
commit b873d70369
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GPG key ID: 76698F39D527CE8C
21 changed files with 16 additions and 1512 deletions
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14
libnetwork/bitseq/sequence_test.go
View file

@ -9,8 +9,8 @@ import (
"time"
"github.com/docker/docker/libnetwork/datastore"
"github.com/docker/libkv/store"
"github.com/docker/libkv/store/boltdb"
store "github.com/docker/docker/libnetwork/internal/kvstore"
"github.com/docker/docker/libnetwork/internal/kvstore/boltdb"
)
var (
@ -222,7 +222,7 @@ func testSetRollover(t *testing.T, serial bool) {
t.Fatalf("Unexpected free bits: found %d free bits.\nSeed: %d.\n%s", unselected, seed, hnd)
}
//request to allocate for remaining half of the bits
// request to allocate for remaining half of the bits
for i := 0; i < numBits/2; i++ {
_, err := hnd.SetAny(serial)
if err != nil {
@ -230,8 +230,8 @@ func testSetRollover(t *testing.T, serial bool) {
}
}
//At this point all the bits must be allocated except the randomly unallocated bits
//which were unallocated in the first half of the bit sequence
// At this point all the bits must be allocated except the randomly unallocated bits
// which were unallocated in the first half of the bit sequence
if unselected := hnd.Unselected(); unselected != uint64(numBits/4) {
t.Fatalf("Unexpected number of unselected bits %d, Expected %d", unselected, numBits/4)
}
@ -242,8 +242,8 @@ func testSetRollover(t *testing.T, serial bool) {
t.Fatalf("Unexpected failure on allocation %d: %v\nSeed: %d\n%s", i, err, seed, hnd)
}
}
//Now requesting to allocate the unallocated random bits (qurter of the number of bits) should
//leave no more bits that can be allocated.
// Now requesting to allocate the unallocated random bits (qurter of the number of bits) should
// leave no more bits that can be allocated.
if hnd.Unselected() != 0 {
t.Fatalf("Unexpected number of unselected bits %d, Expected %d", hnd.Unselected(), 0)
}

2
libnetwork/config/config.go
View file

@ -7,11 +7,11 @@ import (
"github.com/containerd/containerd/log"
"github.com/docker/docker/libnetwork/cluster"
"github.com/docker/docker/libnetwork/datastore"
store "github.com/docker/docker/libnetwork/internal/kvstore"
"github.com/docker/docker/libnetwork/ipamutils"
"github.com/docker/docker/libnetwork/netlabel"
"github.com/docker/docker/libnetwork/osl"
"github.com/docker/docker/pkg/plugingetter"
"github.com/docker/libkv/store"
)
const (

2
libnetwork/datastore/cache.go
View file

@ -5,7 +5,7 @@ import (
"fmt"
"sync"
"github.com/docker/libkv/store"
store "github.com/docker/docker/libnetwork/internal/kvstore"
)
type kvMap map[string]KVObject

5
libnetwork/datastore/datastore.go
View file

@ -9,9 +9,8 @@ import (
"time"
"github.com/docker/docker/libnetwork/discoverapi"
store "github.com/docker/docker/libnetwork/internal/kvstore"
"github.com/docker/docker/libnetwork/types"
"github.com/docker/libkv"
"github.com/docker/libkv/store"
)
// DataStore exported
@ -204,7 +203,7 @@ func newClient(kv string, addr string, config *store.Config) (DataStore, error)
}
}
s, err := libkv.NewStore(store.Backend(kv), addrs, config)
s, err := store.New(store.Backend(kv), addrs, config)
if err != nil {
return nil, err
}

2
libnetwork/datastore/mock_store.go
View file

@ -3,8 +3,8 @@ package datastore
import (
"errors"
store "github.com/docker/docker/libnetwork/internal/kvstore"
"github.com/docker/docker/libnetwork/types"
"github.com/docker/libkv/store"
)
var (

2
libnetwork/drivers/overlay/overlay_test.go
View file

@ -6,8 +6,8 @@ import (
"testing"
"github.com/docker/docker/libnetwork/driverapi"
"github.com/docker/docker/libnetwork/internal/kvstore/boltdb"
"github.com/docker/docker/pkg/plugingetter"
"github.com/docker/libkv/store/boltdb"
)
func init() {

2
libnetwork/store.go
View file

@ -7,7 +7,7 @@ import (
"github.com/containerd/containerd/log"
"github.com/docker/docker/libnetwork/datastore"
"github.com/docker/libkv/store/boltdb"
"github.com/docker/docker/libnetwork/internal/kvstore/boltdb"
)
func registerKVStores() {

2
libnetwork/store_linux_test.go
View file

@ -5,7 +5,7 @@ import (
"testing"
"github.com/docker/docker/libnetwork/datastore"
"github.com/docker/libkv/store"
store "github.com/docker/docker/libnetwork/internal/kvstore"
)
func TestBoltdbBackend(t *testing.T) {

2
libnetwork/store_test.go
View file

@ -7,9 +7,9 @@ import (
"github.com/docker/docker/libnetwork/config"
"github.com/docker/docker/libnetwork/datastore"
store "github.com/docker/docker/libnetwork/internal/kvstore"
"github.com/docker/docker/libnetwork/netlabel"
"github.com/docker/docker/libnetwork/options"
"github.com/docker/libkv/store"
)
func testLocalBackend(t *testing.T, provider, url string, storeConfig *store.Config) {

1
vendor.mod
View file

@ -39,7 +39,6 @@ require (
github.com/docker/go-events v0.0.0-20190806004212-e31b211e4f1c
github.com/docker/go-metrics v0.0.1
github.com/docker/go-units v0.5.0
github.com/docker/libkv v0.2.2-0.20211217103745-e480589147e3
github.com/docker/libtrust v0.0.0-20150526203908-9cbd2a1374f4
github.com/fluent/fluent-logger-golang v1.9.0
github.com/godbus/dbus/v5 v5.1.0

2
vendor.sum
View file

@ -531,8 +531,6 @@ github.com/docker/go-units v0.3.3/go.mod h1:fgPhTUdO+D/Jk86RDLlptpiXQzgHJF7gydDD
github.com/docker/go-units v0.4.0/go.mod h1:fgPhTUdO+D/Jk86RDLlptpiXQzgHJF7gydDDbaIK4Dk=
github.com/docker/go-units v0.5.0 h1:69rxXcBk27SvSaaxTtLh/8llcHD8vYHT7WSdRZ/jvr4=
github.com/docker/go-units v0.5.0/go.mod h1:fgPhTUdO+D/Jk86RDLlptpiXQzgHJF7gydDDbaIK4Dk=
github.com/docker/libkv v0.2.2-0.20211217103745-e480589147e3 h1:q6MhOaE4xsrl6cAiFYrazobNFSQN6ckhD6Et9zYbcrU=
github.com/docker/libkv v0.2.2-0.20211217103745-e480589147e3/go.mod h1:r5hEwHwW8dr0TFBYGCarMNbrQOiwL1xoqDYZ/JqoTK0=
github.com/docker/libnetwork v0.8.0-dev.2.0.20200917202933-d0951081b35f/go.mod h1:93m0aTqz6z+g32wla4l4WxTrdtvBRmVzYRkYvasA5Z8=
github.com/docker/libtrust v0.0.0-20150114040149-fa567046d9b1/go.mod h1:cyGadeNEkKy96OOhEzfZl+yxihPEzKnqJwvfuSUqbZE=
github.com/docker/libtrust v0.0.0-20150526203908-9cbd2a1374f4 h1:k8TfKGeAcDQFFQOGCQMRN04N4a9YrPlRMMKnzAuvM9Q=

31
vendor/github.com/docker/libkv/.travis.yml generated vendored
View file

@ -1,31 +0,0 @@
language: go
go:
- 1.8.7
# let us have speedy Docker-based Travis workers
sudo: false
before_install:
# Symlink below is needed for Travis CI to work correctly on personal forks of libkv
- ln -s $HOME/gopath/src/github.com/${TRAVIS_REPO_SLUG///libkv/} $HOME/gopath/src/github.com/docker
- go get golang.org/x/tools/cmd/cover
- go get github.com/mattn/goveralls
- go get github.com/golang/lint/golint
- go get github.com/GeertJohan/fgt
before_script:
- script/travis_consul.sh 0.6.3
- script/travis_etcd.sh 3.0.0
- script/travis_zk.sh 3.5.4-beta
script:
- ./consul agent -server -bootstrap -advertise=127.0.0.1 -data-dir /tmp/consul -config-file=./config.json 1>/dev/null &
- ./etcd/etcd --listen-client-urls 'http://0.0.0.0:4001' --advertise-client-urls 'http://127.0.0.1:4001' >/dev/null 2>&1 &
- ./zk/bin/zkServer.sh start ./zk/conf/zoo.cfg 1> /dev/null
- script/validate-gofmt
- go vet ./...
- fgt golint ./...
- go test -v -race ./...
- script/coverage
- goveralls -service=travis-ci -coverprofile=goverage.report

191
vendor/github.com/docker/libkv/LICENSE.code generated vendored
View file

@ -1,191 +0,0 @@
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reasonable to satisfy the conditions by providing a URI or
hyperlink to a resource that includes the required
information.
3. If requested by the Licensor, You must remove any of the
information required by Section 3(a)(1)(A) to the extent
reasonably practicable.
b. ShareAlike.
In addition to the conditions in Section 3(a), if You Share
Adapted Material You produce, the following conditions also apply.
1. The Adapter's License You apply must be a Creative Commons
license with the same License Elements, this version or
later, or a BY-SA Compatible License.
2. You must include the text of, or the URI or hyperlink to, the
Adapter's License You apply. You may satisfy this condition
in any reasonable manner based on the medium, means, and
context in which You Share Adapted Material.
3. You may not offer or impose any additional or different terms
or conditions on, or apply any Effective Technological
Measures to, Adapted Material that restrict exercise of the
rights granted under the Adapter's License You apply.
Section 4 -- Sui Generis Database Rights.
Where the Licensed Rights include Sui Generis Database Rights that
apply to Your use of the Licensed Material:
a. for the avoidance of doubt, Section 2(a)(1) grants You the right
to extract, reuse, reproduce, and Share all or a substantial
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c. You must comply with the conditions in Section 3(a) if You Share
all or a substantial portion of the contents of the database.
For the avoidance of doubt, this Section 4 supplements and does not
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Rights include other Copyright and Similar Rights.
Section 5 -- Disclaimer of Warranties and Limitation of Liability.
a. UNLESS OTHERWISE SEPARATELY UNDERTAKEN BY THE LICENSOR, TO THE
EXTENT POSSIBLE, THE LICENSOR OFFERS THE LICENSED MATERIAL AS-IS
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IMPLIED, STATUTORY, OR OTHER. THIS INCLUDES, WITHOUT LIMITATION,
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PURPOSE, NON-INFRINGEMENT, ABSENCE OF LATENT OR OTHER DEFECTS,
ACCURACY, OR THE PRESENCE OR ABSENCE OF ERRORS, WHETHER OR NOT
KNOWN OR DISCOVERABLE. WHERE DISCLAIMERS OF WARRANTIES ARE NOT
ALLOWED IN FULL OR IN PART, THIS DISCLAIMER MAY NOT APPLY TO YOU.
b. TO THE EXTENT POSSIBLE, IN NO EVENT WILL THE LICENSOR BE LIABLE
TO YOU ON ANY LEGAL THEORY (INCLUDING, WITHOUT LIMITATION,
NEGLIGENCE) OR OTHERWISE FOR ANY DIRECT, SPECIAL, INDIRECT,
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COSTS, EXPENSES, OR DAMAGES ARISING OUT OF THIS PUBLIC LICENSE OR
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c. The disclaimer of warranties and limitation of liability provided
above shall be interpreted in a manner that, to the extent
possible, most closely approximates an absolute disclaimer and
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Section 6 -- Term and Termination.
a. This Public License applies for the term of the Copyright and
Similar Rights licensed here. However, if You fail to comply with
this Public License, then Your rights under this Public License
terminate automatically.
b. Where Your right to use the Licensed Material has terminated under
Section 6(a), it reinstates:
1. automatically as of the date the violation is cured, provided
it is cured within 30 days of Your discovery of the
violation; or
2. upon express reinstatement by the Licensor.
For the avoidance of doubt, this Section 6(b) does not affect any
right the Licensor may have to seek remedies for Your violations
of this Public License.
c. For the avoidance of doubt, the Licensor may also offer the
Licensed Material under separate terms or conditions or stop
distributing the Licensed Material at any time; however, doing so
will not terminate this Public License.
d. Sections 1, 5, 6, 7, and 8 survive termination of this Public
License.
Section 7 -- Other Terms and Conditions.
a. The Licensor shall not be bound by any additional or different
terms or conditions communicated by You unless expressly agreed.
b. Any arrangements, understandings, or agreements regarding the
Licensed Material not stated herein are separate from and
independent of the terms and conditions of this Public License.
Section 8 -- Interpretation.
a. For the avoidance of doubt, this Public License does not, and
shall not be interpreted to, reduce, limit, restrict, or impose
conditions on any use of the Licensed Material that could lawfully
be made without permission under this Public License.
b. To the extent possible, if any provision of this Public License is
deemed unenforceable, it shall be automatically reformed to the
minimum extent necessary to make it enforceable. If the provision
cannot be reformed, it shall be severed from this Public License
without affecting the enforceability of the remaining terms and
conditions.
c. No term or condition of this Public License will be waived and no
failure to comply consented to unless expressly agreed to by the
Licensor.
d. Nothing in this Public License constitutes or may be interpreted
as a limitation upon, or waiver of, any privileges and immunities
that apply to the Licensor or You, including from the legal
processes of any jurisdiction or authority.
=======================================================================
Creative Commons is not a party to its public licenses.
Notwithstanding, Creative Commons may elect to apply one of its public
licenses to material it publishes and in those instances will be
considered the "Licensor." Except for the limited purpose of indicating
that material is shared under a Creative Commons public license or as
otherwise permitted by the Creative Commons policies published at
creativecommons.org/policies, Creative Commons does not authorize the
use of the trademark "Creative Commons" or any other trademark or logo
of Creative Commons without its prior written consent including,
without limitation, in connection with any unauthorized modifications
to any of its public licenses or any other arrangements,
understandings, or agreements concerning use of licensed material. For
the avoidance of doubt, this paragraph does not form part of the public
licenses.
Creative Commons may be contacted at creativecommons.org.

40
vendor/github.com/docker/libkv/MAINTAINERS generated vendored
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@ -1,40 +0,0 @@
# Libkv maintainers file
#
# This file describes who runs the docker/libkv project and how.
# This is a living document - if you see something out of date or missing, speak up!
#
# It is structured to be consumable by both humans and programs.
# To extract its contents programmatically, use any TOML-compliant parser.
#
# This file is compiled into the MAINTAINERS file in docker/opensource.
#
[Org]
[Org."Core maintainers"]
people = [
"aluzzardi",
"sanimej",
"vieux",
]
[people]
# A reference list of all people associated with the project.
# All other sections should refer to people by their canonical key
# in the people section.
# ADD YOURSELF HERE IN ALPHABETICAL ORDER
[people.aluzzardi]
Name = "Andrea Luzzardi"
Email = "al@docker.com"
GitHub = "aluzzardi"
[people.sanimej]
Name = "Santhosh Manohar"
Email = "santhosh@docker.com"
GitHub = "sanimej"
[people.vieux]
Name = "Victor Vieux"
Email = "vieux@docker.com"
GitHub = "vieux"

107
vendor/github.com/docker/libkv/README.md generated vendored
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@ -1,107 +0,0 @@
# libkv
[![GoDoc](https://godoc.org/github.com/docker/libkv?status.png)](https://godoc.org/github.com/docker/libkv)
[![Build Status](https://travis-ci.org/docker/libkv.svg?branch=master)](https://travis-ci.org/docker/libkv)
[![Coverage Status](https://coveralls.io/repos/docker/libkv/badge.svg)](https://coveralls.io/r/docker/libkv)
[![Go Report Card](https://goreportcard.com/badge/github.com/docker/libkv)](https://goreportcard.com/report/github.com/docker/libkv)
`libkv` provides a `Go` native library to store metadata.
The goal of `libkv` is to abstract common store operations for multiple distributed and/or local Key/Value store backends.
For example, you can use it to store your metadata or for service discovery to register machines and endpoints inside your cluster.
You can also easily implement a generic *Leader Election* on top of it (see the [docker/leadership](https://github.com/docker/leadership) repository).
As of now, `libkv` offers support for `Consul`, `Etcd`, `Zookeeper` (**Distributed** store) and `BoltDB` (**Local** store).
## Usage
`libkv` is meant to be used as an abstraction layer over existing distributed Key/Value stores. It is especially useful if you plan to support `consul`, `etcd` and `zookeeper` using the same codebase.
It is ideal if you plan for something written in Go that should support:
- A simple metadata storage, distributed or local
- A lightweight discovery service for your nodes
- A distributed lock mechanism
You can find examples of usage for `libkv` under in `docs/examples.go`. Optionally you can also take a look at the `docker/swarm` or `docker/libnetwork` repositories which are using `docker/libkv` for all the use cases listed above.
## Supported versions
`libkv` supports:
- Consul versions >= `0.5.1` because it uses Sessions with `Delete` behavior for the use of `TTLs` (mimics zookeeper's Ephemeral node support), If you don't plan to use `TTLs`: you can use Consul version `0.4.0+`.
- Etcd versions >= `2.0` because it uses the new `coreos/etcd/client`, this might change in the future as the support for `APIv3` comes along and adds more capabilities.
- Zookeeper versions >= `3.4.5`. Although this might work with previous version but this remains untested as of now.
- Boltdb, which shouldn't be subject to any version dependencies.
## Interface
A **storage backend** in `libkv` should implement (fully or partially) this interface:
```go
type Store interface {
Put(key string, value []byte, options *WriteOptions) error
Get(key string) (*KVPair, error)
Delete(key string) error
Exists(key string) (bool, error)
Watch(key string, stopCh <-chan struct{}) (<-chan *KVPair, error)
WatchTree(directory string, stopCh <-chan struct{}) (<-chan []*KVPair, error)
NewLock(key string, options *LockOptions) (Locker, error)
List(directory string) ([]*KVPair, error)
DeleteTree(directory string) error
AtomicPut(key string, value []byte, previous *KVPair, options *WriteOptions) (bool, *KVPair, error)
AtomicDelete(key string, previous *KVPair) (bool, error)
Close()
}
```
## Compatibility matrix
Backend drivers in `libkv` are generally divided between **local drivers** and **distributed drivers**. Distributed backends offer enhanced capabilities like `Watches` and/or distributed `Locks`.
Local drivers are usually used in complement to the distributed drivers to store informations that only needs to be available locally.
| Calls | Consul | Etcd | Zookeeper | BoltDB |
|-----------------------|:----------:|:------:|:-----------:|:--------:|
| Put | X | X | X | X |
| Get | X | X | X | X |
| Delete | X | X | X | X |
| Exists | X | X | X | X |
| Watch | X | X | X | |
| WatchTree | X | X | X | |
| NewLock (Lock/Unlock) | X | X | X | |
| List | X | X | X | X |
| DeleteTree | X | X | X | X |
| AtomicPut | X | X | X | X |
| Close | X | X | X | X |
## Limitations
Distributed Key/Value stores often have different concepts for managing and formatting keys and their associated values. Even though `libkv` tries to abstract those stores aiming for some consistency, in some cases it can't be applied easily.
Please refer to the `docs/compatibility.md` to see what are the special cases for cross-backend compatibility.
Other than those special cases, you should expect the same experience for basic operations like `Get`/`Put`, etc.
Calls like `WatchTree` may return different events (or number of events) depending on the backend (for now, `Etcd` and `Consul` will likely return more events than `Zookeeper` that you should triage properly). Although you should be able to use it successfully to watch on events in an interchangeable way (see the **docker/leadership** repository or the **pkg/discovery/kv** package in **docker/docker**).
## TLS
Only `Consul` and `etcd` have support for TLS and you should build and provide your own `config.TLS` object to feed the client. Support is planned for `zookeeper`.
## Roadmap
- Make the API nicer to use (using `options`)
- Provide more options (`consistency` for example)
- Improve performance (remove extras `Get`/`List` operations)
- Better key formatting
- New backends?
## Contributing
Want to hack on libkv? [Docker's contributions guidelines](https://github.com/docker/docker/blob/master/CONTRIBUTING.md) apply.
## Copyright and license
Copyright © 2014-2016 Docker, Inc. All rights reserved, except as follows. Code is released under the Apache 2.0 license. The README.md file, and files in the "docs" folder are licensed under the Creative Commons Attribution 4.0 International License under the terms and conditions set forth in the file "LICENSE.docs". You may obtain a duplicate copy of the same license, titled CC-BY-SA-4.0, at http://creativecommons.org/licenses/by/4.0/.

40
vendor/github.com/docker/libkv/libkv.go generated vendored
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@ -1,40 +0,0 @@
package libkv
import (
"fmt"
"sort"
"strings"
"github.com/docker/libkv/store"
)
// Initialize creates a new Store object, initializing the client
type Initialize func(addrs []string, options *store.Config) (store.Store, error)
var (
// Backend initializers
initializers = make(map[store.Backend]Initialize)
supportedBackend = func() string {
keys := make([]string, 0, len(initializers))
for k := range initializers {
keys = append(keys, string(k))
}
sort.Strings(keys)
return strings.Join(keys, ", ")
}()
)
// NewStore creates an instance of store
func NewStore(backend store.Backend, addrs []string, options *store.Config) (store.Store, error) {
if init, exists := initializers[backend]; exists {
return init(addrs, options)
}
return nil, fmt.Errorf("%s %s", store.ErrBackendNotSupported.Error(), supportedBackend)
}
// AddStore adds a new store backend to libkv
func AddStore(store store.Backend, init Initialize) {
initializers[store] = init
}

474
vendor/github.com/docker/libkv/store/boltdb/boltdb.go generated vendored
View file

@ -1,474 +0,0 @@
package boltdb
import (
"bytes"
"encoding/binary"
"errors"
"os"
"path/filepath"
"sync"
"sync/atomic"
"time"
"github.com/docker/libkv"
"github.com/docker/libkv/store"
bolt "go.etcd.io/bbolt"
)
var (
// ErrMultipleEndpointsUnsupported is thrown when multiple endpoints specified for
// BoltDB. Endpoint has to be a local file path
ErrMultipleEndpointsUnsupported = errors.New("boltdb supports one endpoint and should be a file path")
// ErrBoltBucketOptionMissing is thrown when boltBcuket config option is missing
ErrBoltBucketOptionMissing = errors.New("boltBucket config option missing")
)
const (
filePerm os.FileMode = 0644
)
//BoltDB type implements the Store interface
type BoltDB struct {
client *bolt.DB
boltBucket []byte
dbIndex uint64
path string
timeout time.Duration
// By default libkv opens and closes the bolt DB connection for every
// get/put operation. This allows multiple apps to use a Bolt DB at the
// same time.
// PersistConnection flag provides an option to override ths behavior.
// ie: open the connection in New and use it till Close is called.
PersistConnection bool
sync.Mutex
}
const (
libkvmetadatalen = 8
transientTimeout = time.Duration(10) * time.Second
)
// Register registers boltdb to libkv
func Register() {
libkv.AddStore(store.BOLTDB, New)
}
// New opens a new BoltDB connection to the specified path and bucket
func New(endpoints []string, options *store.Config) (store.Store, error) {
var (
db *bolt.DB
err error
boltOptions *bolt.Options
timeout = transientTimeout
)
if len(endpoints) > 1 {
return nil, ErrMultipleEndpointsUnsupported
}
if (options == nil) || (len(options.Bucket) == 0) {
return nil, ErrBoltBucketOptionMissing
}
dir, _ := filepath.Split(endpoints[0])
if err = os.MkdirAll(dir, 0750); err != nil {
return nil, err
}
if options.PersistConnection {
boltOptions = &bolt.Options{Timeout: options.ConnectionTimeout}
db, err = bolt.Open(endpoints[0], filePerm, boltOptions)
if err != nil {
return nil, err
}
}
if options.ConnectionTimeout != 0 {
timeout = options.ConnectionTimeout
}
b := &BoltDB{
client: db,
path: endpoints[0],
boltBucket: []byte(options.Bucket),
timeout: timeout,
PersistConnection: options.PersistConnection,
}
return b, nil
}
func (b *BoltDB) reset() {
b.path = ""
b.boltBucket = []byte{}
}
func (b *BoltDB) getDBhandle() (*bolt.DB, error) {
var (
db *bolt.DB
err error
)
if !b.PersistConnection {
boltOptions := &bolt.Options{Timeout: b.timeout}
if db, err = bolt.Open(b.path, filePerm, boltOptions); err != nil {
return nil, err
}
b.client = db
}
return b.client, nil
}
func (b *BoltDB) releaseDBhandle() {
if !b.PersistConnection {
b.client.Close()
}
}
// Get the value at "key". BoltDB doesn't provide an inbuilt last modified index with every kv pair. Its implemented by
// by a atomic counter maintained by the libkv and appened to the value passed by the client.
func (b *BoltDB) Get(key string) (*store.KVPair, error) {
var (
val []byte
db *bolt.DB
err error
)
b.Lock()
defer b.Unlock()
if db, err = b.getDBhandle(); err != nil {
return nil, err
}
defer b.releaseDBhandle()
err = db.View(func(tx *bolt.Tx) error {
bucket := tx.Bucket(b.boltBucket)
if bucket == nil {
return store.ErrKeyNotFound
}
v := bucket.Get([]byte(key))
val = make([]byte, len(v))
copy(val, v)
return nil
})
if len(val) == 0 {
return nil, store.ErrKeyNotFound
}
if err != nil {
return nil, err
}
dbIndex := binary.LittleEndian.Uint64(val[:libkvmetadatalen])
val = val[libkvmetadatalen:]
return &store.KVPair{Key: key, Value: val, LastIndex: (dbIndex)}, nil
}
//Put the key, value pair. index number metadata is prepended to the value
func (b *BoltDB) Put(key string, value []byte, opts *store.WriteOptions) error {
var (
dbIndex uint64
db *bolt.DB
err error
)
b.Lock()
defer b.Unlock()
dbval := make([]byte, libkvmetadatalen)
if db, err = b.getDBhandle(); err != nil {
return err
}
defer b.releaseDBhandle()
err = db.Update(func(tx *bolt.Tx) error {
bucket, err := tx.CreateBucketIfNotExists(b.boltBucket)
if err != nil {
return err
}
dbIndex = atomic.AddUint64(&b.dbIndex, 1)
binary.LittleEndian.PutUint64(dbval, dbIndex)
dbval = append(dbval, value...)
err = bucket.Put([]byte(key), dbval)
if err != nil {
return err
}
return nil
})
return err
}
//Delete the value for the given key.
func (b *BoltDB) Delete(key string) error {
var (
db *bolt.DB
err error
)
b.Lock()
defer b.Unlock()
if db, err = b.getDBhandle(); err != nil {
return err
}
defer b.releaseDBhandle()
err = db.Update(func(tx *bolt.Tx) error {
bucket := tx.Bucket(b.boltBucket)
if bucket == nil {
return store.ErrKeyNotFound
}
err := bucket.Delete([]byte(key))
return err
})
return err
}
// Exists checks if the key exists inside the store
func (b *BoltDB) Exists(key string) (bool, error) {
var (
val []byte
db *bolt.DB
err error
)
b.Lock()
defer b.Unlock()
if db, err = b.getDBhandle(); err != nil {
return false, err
}
defer b.releaseDBhandle()
err = db.View(func(tx *bolt.Tx) error {
bucket := tx.Bucket(b.boltBucket)
if bucket == nil {
return store.ErrKeyNotFound
}
val = bucket.Get([]byte(key))
return nil
})
if len(val) == 0 {
return false, err
}
return true, err
}
// List returns the range of keys starting with the passed in prefix
func (b *BoltDB) List(keyPrefix string) ([]*store.KVPair, error) {
var (
db *bolt.DB
err error
)
b.Lock()
defer b.Unlock()
kv := []*store.KVPair{}
if db, err = b.getDBhandle(); err != nil {
return nil, err
}
defer b.releaseDBhandle()
err = db.View(func(tx *bolt.Tx) error {
bucket := tx.Bucket(b.boltBucket)
if bucket == nil {
return store.ErrKeyNotFound
}
cursor := bucket.Cursor()
prefix := []byte(keyPrefix)
for key, v := cursor.Seek(prefix); bytes.HasPrefix(key, prefix); key, v = cursor.Next() {
dbIndex := binary.LittleEndian.Uint64(v[:libkvmetadatalen])
v = v[libkvmetadatalen:]
val := make([]byte, len(v))
copy(val, v)
kv = append(kv, &store.KVPair{
Key: string(key),
Value: val,
LastIndex: dbIndex,
})
}
return nil
})
if len(kv) == 0 {
return nil, store.ErrKeyNotFound
}
return kv, err
}
// AtomicDelete deletes a value at "key" if the key
// has not been modified in the meantime, throws an
// error if this is the case
func (b *BoltDB) AtomicDelete(key string, previous *store.KVPair) (bool, error) {
var (
val []byte
db *bolt.DB
err error
)
b.Lock()
defer b.Unlock()
if previous == nil {
return false, store.ErrPreviousNotSpecified
}
if db, err = b.getDBhandle(); err != nil {
return false, err
}
defer b.releaseDBhandle()
err = db.Update(func(tx *bolt.Tx) error {
bucket := tx.Bucket(b.boltBucket)
if bucket == nil {
return store.ErrKeyNotFound
}
val = bucket.Get([]byte(key))
if val == nil {
return store.ErrKeyNotFound
}
dbIndex := binary.LittleEndian.Uint64(val[:libkvmetadatalen])
if dbIndex != previous.LastIndex {
return store.ErrKeyModified
}
err := bucket.Delete([]byte(key))
return err
})
if err != nil {
return false, err
}
return true, err
}
// AtomicPut puts a value at "key" if the key has not been
// modified since the last Put, throws an error if this is the case
func (b *BoltDB) AtomicPut(key string, value []byte, previous *store.KVPair, options *store.WriteOptions) (bool, *store.KVPair, error) {
var (
val []byte
dbIndex uint64
db *bolt.DB
err error
)
b.Lock()
defer b.Unlock()
dbval := make([]byte, libkvmetadatalen)
if db, err = b.getDBhandle(); err != nil {
return false, nil, err
}
defer b.releaseDBhandle()
err = db.Update(func(tx *bolt.Tx) error {
var err error
bucket := tx.Bucket(b.boltBucket)
if bucket == nil {
if previous != nil {
return store.ErrKeyNotFound
}
bucket, err = tx.CreateBucket(b.boltBucket)
if err != nil {
return err
}
}
// AtomicPut is equivalent to Put if previous is nil and the Ky
// doesn't exist in the DB.
val = bucket.Get([]byte(key))
if previous == nil && len(val) != 0 {
return store.ErrKeyExists
}
if previous != nil {
if len(val) == 0 {
return store.ErrKeyNotFound
}
dbIndex = binary.LittleEndian.Uint64(val[:libkvmetadatalen])
if dbIndex != previous.LastIndex {
return store.ErrKeyModified
}
}
dbIndex = atomic.AddUint64(&b.dbIndex, 1)
binary.LittleEndian.PutUint64(dbval, b.dbIndex)
dbval = append(dbval, value...)
return (bucket.Put([]byte(key), dbval))
})
if err != nil {
return false, nil, err
}
updated := &store.KVPair{
Key: key,
Value: value,
LastIndex: dbIndex,
}
return true, updated, nil
}
// Close the db connection to the BoltDB
func (b *BoltDB) Close() {
b.Lock()
defer b.Unlock()
if !b.PersistConnection {
b.reset()
} else {
b.client.Close()
}
return
}
// DeleteTree deletes a range of keys with a given prefix
func (b *BoltDB) DeleteTree(keyPrefix string) error {
var (
db *bolt.DB
err error
)
b.Lock()
defer b.Unlock()
if db, err = b.getDBhandle(); err != nil {
return err
}
defer b.releaseDBhandle()
err = db.Update(func(tx *bolt.Tx) error {
bucket := tx.Bucket(b.boltBucket)
if bucket == nil {
return store.ErrKeyNotFound
}
cursor := bucket.Cursor()
prefix := []byte(keyPrefix)
for key, _ := cursor.Seek(prefix); bytes.HasPrefix(key, prefix); key, _ = cursor.Next() {
_ = bucket.Delete([]byte(key))
}
return nil
})
return err
}
// NewLock has to implemented at the library level since its not supported by BoltDB
func (b *BoltDB) NewLock(key string, options *store.LockOptions) (store.Locker, error) {
return nil, store.ErrCallNotSupported
}
// Watch has to implemented at the library level since its not supported by BoltDB
func (b *BoltDB) Watch(key string, stopCh <-chan struct{}) (<-chan *store.KVPair, error) {
return nil, store.ErrCallNotSupported
}
// WatchTree has to implemented at the library level since its not supported by BoltDB
func (b *BoltDB) WatchTree(directory string, stopCh <-chan struct{}) (<-chan []*store.KVPair, error) {
return nil, store.ErrCallNotSupported
}

47
vendor/github.com/docker/libkv/store/helpers.go generated vendored
View file

@ -1,47 +0,0 @@
package store
import (
"strings"
)
// CreateEndpoints creates a list of endpoints given the right scheme
func CreateEndpoints(addrs []string, scheme string) (entries []string) {
for _, addr := range addrs {
entries = append(entries, scheme+"://"+addr)
}
return entries
}
// Normalize the key for each store to the form:
//
// /path/to/key
//
func Normalize(key string) string {
return "/" + join(SplitKey(key))
}
// GetDirectory gets the full directory part of
// the key to the form:
//
// /path/to/
//
func GetDirectory(key string) string {
parts := SplitKey(key)
parts = parts[:len(parts)-1]
return "/" + join(parts)
}
// SplitKey splits the key to extract path informations
func SplitKey(key string) (path []string) {
if strings.Contains(key, "/") {
path = strings.Split(key, "/")
} else {
path = []string{key}
}
return path
}
// join the path parts with '/'
func join(parts []string) string {
return strings.Join(parts, "/")
}

132
vendor/github.com/docker/libkv/store/store.go generated vendored
View file

@ -1,132 +0,0 @@
package store
import (
"crypto/tls"
"errors"
"time"
)
// Backend represents a KV Store Backend
type Backend string
const (
// CONSUL backend
CONSUL Backend = "consul"
// ETCD backend
ETCD Backend = "etcd"
// ZK backend
ZK Backend = "zk"
// BOLTDB backend
BOLTDB Backend = "boltdb"
)
var (
// ErrBackendNotSupported is thrown when the backend k/v store is not supported by libkv
ErrBackendNotSupported = errors.New("Backend storage not supported yet, please choose one of")
// ErrCallNotSupported is thrown when a method is not implemented/supported by the current backend
ErrCallNotSupported = errors.New("The current call is not supported with this backend")
// ErrNotReachable is thrown when the API cannot be reached for issuing common store operations
ErrNotReachable = errors.New("Api not reachable")
// ErrCannotLock is thrown when there is an error acquiring a lock on a key
ErrCannotLock = errors.New("Error acquiring the lock")
// ErrKeyModified is thrown during an atomic operation if the index does not match the one in the store
ErrKeyModified = errors.New("Unable to complete atomic operation, key modified")
// ErrKeyNotFound is thrown when the key is not found in the store during a Get operation
ErrKeyNotFound = errors.New("Key not found in store")
// ErrPreviousNotSpecified is thrown when the previous value is not specified for an atomic operation
ErrPreviousNotSpecified = errors.New("Previous K/V pair should be provided for the Atomic operation")
// ErrKeyExists is thrown when the previous value exists in the case of an AtomicPut
ErrKeyExists = errors.New("Previous K/V pair exists, cannot complete Atomic operation")
)
// Config contains the options for a storage client
type Config struct {
ClientTLS *ClientTLSConfig
TLS *tls.Config
ConnectionTimeout time.Duration
Bucket string
PersistConnection bool
Username string
Password string
}
// ClientTLSConfig contains data for a Client TLS configuration in the form
// the etcd client wants it. Eventually we'll adapt it for ZK and Consul.
type ClientTLSConfig struct {
CertFile string
KeyFile string
CACertFile string
}
// Store represents the backend K/V storage
// Each store should support every call listed
// here. Or it couldn't be implemented as a K/V
// backend for libkv
type Store interface {
// Put a value at the specified key
Put(key string, value []byte, options *WriteOptions) error
// Get a value given its key
Get(key string) (*KVPair, error)
// Delete the value at the specified key
Delete(key string) error
// Verify if a Key exists in the store
Exists(key string) (bool, error)
// Watch for changes on a key
Watch(key string, stopCh <-chan struct{}) (<-chan *KVPair, error)
// WatchTree watches for changes on child nodes under
// a given directory
WatchTree(directory string, stopCh <-chan struct{}) (<-chan []*KVPair, error)
// NewLock creates a lock for a given key.
// The returned Locker is not held and must be acquired
// with `.Lock`. The Value is optional.
NewLock(key string, options *LockOptions) (Locker, error)
// List the content of a given prefix
List(directory string) ([]*KVPair, error)
// DeleteTree deletes a range of keys under a given directory
DeleteTree(directory string) error
// Atomic CAS operation on a single value.
// Pass previous = nil to create a new key.
AtomicPut(key string, value []byte, previous *KVPair, options *WriteOptions) (bool, *KVPair, error)
// Atomic delete of a single value
AtomicDelete(key string, previous *KVPair) (bool, error)
// Close the store connection
Close()
}
// KVPair represents {Key, Value, Lastindex} tuple
type KVPair struct {
Key string
Value []byte
LastIndex uint64
}
// WriteOptions contains optional request parameters
type WriteOptions struct {
IsDir bool
TTL time.Duration
}
// LockOptions contains optional request parameters
type LockOptions struct {
Value []byte // Optional, value to associate with the lock
TTL time.Duration // Optional, expiration ttl associated with the lock
RenewLock chan struct{} // Optional, chan used to control and stop the session ttl renewal for the lock
}
// Locker provides locking mechanism on top of the store.
// Similar to `sync.Lock` except it may return errors.
type Locker interface {
Lock(stopChan chan struct{}) (<-chan struct{}, error)
Unlock() error
}

5
vendor/modules.txt vendored
View file

@ -406,11 +406,6 @@ github.com/docker/go-metrics
# github.com/docker/go-units v0.5.0
## explicit
github.com/docker/go-units
# github.com/docker/libkv v0.2.2-0.20211217103745-e480589147e3
## explicit
github.com/docker/libkv
github.com/docker/libkv/store
github.com/docker/libkv/store/boltdb
# github.com/docker/libtrust v0.0.0-20150526203908-9cbd2a1374f4
## explicit
github.com/docker/libtrust