Add etcd store

This commit is contained in:
Simone Gotti 2019-02-21 16:00:12 +01:00
parent 24f4ab6bc0
commit e38ba8ea31
3 changed files with 488 additions and 6 deletions

12
go.mod
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@ -1,11 +1,11 @@
module github.com/sorintlab/agola
require (
github.com/davecgh/go-spew v1.1.1 // indirect
github.com/pkg/errors v0.8.0 // indirect
github.com/pmezard/go-difflib v1.0.0 // indirect
github.com/stretchr/testify v1.2.2 // indirect
go.uber.org/atomic v1.3.2 // indirect
go.uber.org/multierr v1.1.0 // indirect
github.com/pkg/errors v0.8.0
go.etcd.io/etcd v0.0.0-20181128220305-dedae6eb7c25
go.uber.org/zap v1.9.1
golang.org/x/crypto v0.0.0-20181203042331-505ab145d0a9 // indirect
golang.org/x/net v0.0.0-20190108225652-1e06a53dbb7e // indirect
golang.org/x/sync v0.0.0-20181221193216-37e7f081c4d4 // indirect
gopkg.in/yaml.v2 v2.2.2 // indirect
)

122
go.sum
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@ -1,14 +1,136 @@
github.com/beorn7/perks v0.0.0-20180321164747-3a771d992973 h1:xJ4a3vCFaGF/jqvzLMYoU8P317H5OQ+Via4RmuPwCS0=
github.com/beorn7/perks v0.0.0-20180321164747-3a771d992973/go.mod h1:Dwedo/Wpr24TaqPxmxbtue+5NUziq4I4S80YR8gNf3Q=
github.com/bgentry/speakeasy v0.1.0 h1:ByYyxL9InA1OWqxJqqp2A5pYHUrCiAL6K3J+LKSsQkY=
github.com/bgentry/speakeasy v0.1.0/go.mod h1:+zsyZBPWlz7T6j88CTgSN5bM796AkVf0kBD4zp0CCIs=
github.com/coreos/go-semver v0.2.0 h1:3Jm3tLmsgAYcjC+4Up7hJrFBPr+n7rAqYeSw/SZazuY=
github.com/coreos/go-semver v0.2.0/go.mod h1:nnelYz7RCh+5ahJtPPxZlU+153eP4D4r3EedlOD2RNk=
github.com/coreos/go-systemd v0.0.0-20180511133405-39ca1b05acc7 h1:u9SHYsPQNyt5tgDm3YN7+9dYrpK96E5wFilTFWIDZOM=
github.com/coreos/go-systemd v0.0.0-20180511133405-39ca1b05acc7/go.mod h1:F5haX7vjVVG0kc13fIWeqUViNPyEJxv/OmvnBo0Yme4=
github.com/coreos/pkg v0.0.0-20160727233714-3ac0863d7acf h1:CAKfRE2YtTUIjjh1bkBtyYFaUT/WmOqsJjgtihT0vMI=
github.com/coreos/pkg v0.0.0-20160727233714-3ac0863d7acf/go.mod h1:E3G3o1h8I7cfcXa63jLwjI0eiQQMgzzUDFVpN/nH/eA=
github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
github.com/dgrijalva/jwt-go v3.2.0+incompatible h1:7qlOGliEKZXTDg6OTjfoBKDXWrumCAMpl/TFQ4/5kLM=
github.com/dgrijalva/jwt-go v3.2.0+incompatible/go.mod h1:E3ru+11k8xSBh+hMPgOLZmtrrCbhqsmaPHjLKYnJCaQ=
github.com/dustin/go-humanize v0.0.0-20171111073723-bb3d318650d4 h1:qk/FSDDxo05wdJH28W+p5yivv7LuLYLRXPPD8KQCtZs=
github.com/dustin/go-humanize v0.0.0-20171111073723-bb3d318650d4/go.mod h1:HtrtbFcZ19U5GC7JDqmcUSB87Iq5E25KnS6fMYU6eOk=
github.com/fatih/color v1.7.0 h1:DkWD4oS2D8LGGgTQ6IvwJJXSL5Vp2ffcQg58nFV38Ys=
github.com/fatih/color v1.7.0/go.mod h1:Zm6kSWBoL9eyXnKyktHP6abPY2pDugNf5KwzbycvMj4=
github.com/fsnotify/fsnotify v1.4.7 h1:IXs+QLmnXW2CcXuY+8Mzv/fWEsPGWxqefPtCP5CnV9I=
github.com/fsnotify/fsnotify v1.4.7/go.mod h1:jwhsz4b93w/PPRr/qN1Yymfu8t87LnFCMoQvtojpjFo=
github.com/ghodss/yaml v1.0.0 h1:wQHKEahhL6wmXdzwWG11gIVCkOv05bNOh+Rxn0yngAk=
github.com/ghodss/yaml v1.0.0/go.mod h1:4dBDuWmgqj2HViK6kFavaiC9ZROes6MMH2rRYeMEF04=
github.com/gogo/protobuf v1.0.0 h1:2jyBKDKU/8v3v2xVR2PtiWQviFUyiaGk2rpfyFT8rTM=
github.com/gogo/protobuf v1.0.0/go.mod h1:r8qH/GZQm5c6nD/R0oafs1akxWv10x8SbQlK7atdtwQ=
github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b h1:VKtxabqXZkF25pY9ekfRL6a582T4P37/31XEstQ5p58=
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github.com/golang/groupcache v0.0.0-20160516000752-02826c3e7903 h1:LbsanbbD6LieFkXbj9YNNBupiGHJgFeLpO0j0Fza1h8=
github.com/golang/groupcache v0.0.0-20160516000752-02826c3e7903/go.mod h1:cIg4eruTrX1D+g88fzRXU5OdNfaM+9IcxsU14FzY7Hc=
github.com/golang/protobuf v1.2.0 h1:P3YflyNX/ehuJFLhxviNdFxQPkGK5cDcApsge1SqnvM=
github.com/golang/protobuf v1.2.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
github.com/google/btree v0.0.0-20180124185431-e89373fe6b4a h1:ZJu5NB1Bk5ms4vw0Xu4i+jD32SE9jQXyfnOvwhHqlT0=
github.com/google/btree v0.0.0-20180124185431-e89373fe6b4a/go.mod h1:lNA+9X1NB3Zf8V7Ke586lFgjr2dZNuvo3lPJSGZ5JPQ=
github.com/google/uuid v1.0.0 h1:b4Gk+7WdP/d3HZH8EJsZpvV7EtDOgaZLtnaNGIu1adA=
github.com/google/uuid v1.0.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
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github.com/gorilla/websocket v0.0.0-20170926233335-4201258b820c/go.mod h1:E7qHFY5m1UJ88s3WnNqhKjPHQ0heANvMoAMk2YaljkQ=
github.com/grpc-ecosystem/go-grpc-middleware v1.0.0 h1:Iju5GlWwrvL6UBg4zJJt3btmonfrMlCDdsejg4CZE7c=
github.com/grpc-ecosystem/go-grpc-middleware v1.0.0/go.mod h1:FiyG127CGDf3tlThmgyCl78X/SZQqEOJBCDaAfeWzPs=
github.com/grpc-ecosystem/go-grpc-prometheus v1.2.0 h1:Ovs26xHkKqVztRpIrF/92BcuyuQ/YW4NSIpoGtfXNho=
github.com/grpc-ecosystem/go-grpc-prometheus v1.2.0/go.mod h1:8NvIoxWQoOIhqOTXgfV/d3M/q6VIi02HzZEHgUlZvzk=
github.com/grpc-ecosystem/grpc-gateway v1.4.1 h1:pX7cnDwSSmG0dR9yNjCQSSpmsJOqFdT7SzVp5Yl9uVw=
github.com/grpc-ecosystem/grpc-gateway v1.4.1/go.mod h1:RSKVYQBd5MCa4OVpNdGskqpgL2+G+NZTnrVHpWWfpdw=
github.com/hpcloud/tail v1.0.0 h1:nfCOvKYfkgYP8hkirhJocXT2+zOD8yUNjXaWfTlyFKI=
github.com/hpcloud/tail v1.0.0/go.mod h1:ab1qPbhIpdTxEkNHXyeSf5vhxWSCs/tWer42PpOxQnU=
github.com/inconshreveable/mousetrap v1.0.0 h1:Z8tu5sraLXCXIcARxBp/8cbvlwVa7Z1NHg9XEKhtSvM=
github.com/inconshreveable/mousetrap v1.0.0/go.mod h1:PxqpIevigyE2G7u3NXJIT2ANytuPF1OarO4DADm73n8=
github.com/jonboulle/clockwork v0.1.0 h1:VKV+ZcuP6l3yW9doeqz6ziZGgcynBVQO+obU0+0hcPo=
github.com/jonboulle/clockwork v0.1.0/go.mod h1:Ii8DK3G1RaLaWxj9trq07+26W01tbo22gdxWY5EU2bo=
github.com/kr/pty v1.0.0 h1:jR04h3bskdxb8xt+5B6MoxPwDhMCe0oEgxug4Ca1YSA=
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github.com/soheilhy/cmux v0.1.4/go.mod h1:IM3LyeVVIOuxMH7sFAkER9+bJ4dT7Ms6E4xg4kGIyLM=
github.com/spf13/cobra v0.0.3 h1:ZlrZ4XsMRm04Fr5pSFxBgfND2EBVa1nLpiy1stUsX/8=
github.com/spf13/cobra v0.0.3/go.mod h1:1l0Ry5zgKvJasoi3XT1TypsSe7PqH0Sj9dhYf7v3XqQ=
github.com/spf13/pflag v1.0.1 h1:aCvUg6QPl3ibpQUxyLkrEkCHtPqYJL4x9AuhqVqFis4=
github.com/spf13/pflag v1.0.1/go.mod h1:DYY7MBk1bdzusC3SYhjObp+wFpr4gzcvqqNjLnInEg4=
github.com/stretchr/testify v1.2.2 h1:bSDNvY7ZPG5RlJ8otE/7V6gMiyenm9RtJ7IUVIAoJ1w=
github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs=
github.com/tmc/grpc-websocket-proxy v0.0.0-20170815181823-89b8d40f7ca8 h1:ndzgwNDnKIqyCvHTXaCqh9KlOWKvBry6nuXMJmonVsE=
github.com/tmc/grpc-websocket-proxy v0.0.0-20170815181823-89b8d40f7ca8/go.mod h1:ncp9v5uamzpCO7NfCPTXjqaC+bZgJeR0sMTm6dMHP7U=
github.com/ugorji/go v1.1.1 h1:gmervu+jDMvXTbcHQ0pd2wee85nEoE0BsVyEuzkfK8w=
github.com/ugorji/go v1.1.1/go.mod h1:hnLbHMwcvSihnDhEfx2/BzKp2xb0Y+ErdfYcrs9tkJQ=
github.com/urfave/cli v1.18.0/go.mod h1:70zkFmudgCuE/ngEzBv17Jvp/497gISqfk5gWijbERA=
github.com/xiang90/probing v0.0.0-20160813154853-07dd2e8dfe18 h1:MPPkRncZLN9Kh4MEFmbnK4h3BD7AUmskWv2+EeZJCCs=
github.com/xiang90/probing v0.0.0-20160813154853-07dd2e8dfe18/go.mod h1:UETIi67q53MR2AWcXfiuqkDkRtnGDLqkBTpCHuJHxtU=
go.etcd.io/bbolt v1.3.1-etcd.7 h1:M0l89sIuZ+RkW0rLbUsmxescVzLwLUs+Kvks+0jeHdM=
go.etcd.io/bbolt v1.3.1-etcd.7/go.mod h1:IbVyRI1SCnLcuJnV2u8VeU0CEYM7e686BmAb1XKL+uU=
go.etcd.io/etcd v0.0.0-20181128220305-dedae6eb7c25 h1:CwNwQW5bpjZHQ9KrGCx5vGYoq+LKcm7ZRGiCYYz6uXM=
go.etcd.io/etcd v0.0.0-20181128220305-dedae6eb7c25/go.mod h1:weASp41xM3dk0YHg1s/W8ecdGP5G4teSTMBPpYAaUgA=
go.uber.org/atomic v1.3.2 h1:2Oa65PReHzfn29GpvgsYwloV9AVFHPDk8tYxt2c2tr4=
go.uber.org/atomic v1.3.2/go.mod h1:gD2HeocX3+yG+ygLZcrzQJaqmWj9AIm7n08wl/qW/PE=
go.uber.org/multierr v1.1.0 h1:HoEmRHQPVSqub6w2z2d2EOVs2fjyFRGyofhKuyDq0QI=
go.uber.org/multierr v1.1.0/go.mod h1:wR5kodmAFQ0UK8QlbwjlSNy0Z68gJhDJUG5sjR94q/0=
go.uber.org/zap v1.9.1 h1:XCJQEf3W6eZaVwhRBof6ImoYGJSITeKWsyeh3HFu/5o=
go.uber.org/zap v1.9.1/go.mod h1:vwi/ZaCAaUcBkycHslxD9B2zi4UTXhF60s6SWpuDF0Q=
golang.org/x/crypto v0.0.0-20180608092829-8ac0e0d97ce4/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
golang.org/x/crypto v0.0.0-20181203042331-505ab145d0a9 h1:mKdxBk7AujPs8kU4m80U72y/zjbZ3UcXC7dClwKbUI0=
golang.org/x/crypto v0.0.0-20181203042331-505ab145d0a9/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
golang.org/x/net v0.0.0-20180906233101-161cd47e91fd h1:nTDtHvHSdCn1m6ITfMRqtOd/9+7a3s8RBNOZ3eYZzJA=
golang.org/x/net v0.0.0-20180906233101-161cd47e91fd/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
golang.org/x/net v0.0.0-20190108225652-1e06a53dbb7e h1:bRhVy7zSSasaqNksaRZiA5EEI+Ei4I1nO5Jh72wfHlg=
golang.org/x/net v0.0.0-20190108225652-1e06a53dbb7e/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f h1:wMNYb4v58l5UBM7MYRLPG6ZhfOqbKu7X5eyFl8ZhKvA=
golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
golang.org/x/sync v0.0.0-20181221193216-37e7f081c4d4 h1:YUO/7uOKsKeq9UokNS62b8FYywz3ker1l1vDZRCRefw=
golang.org/x/sync v0.0.0-20181221193216-37e7f081c4d4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
golang.org/x/sys v0.0.0-20180909124046-d0be0721c37e h1:o3PsSEY8E4eXWkXrIP9YJALUkVZqzHJT5DOasTyn8Vs=
golang.org/x/sys v0.0.0-20180909124046-d0be0721c37e/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
golang.org/x/text v0.3.0 h1:g61tztE5qeGQ89tm6NTjjM9VPIm088od1l6aSorWRWg=
golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
golang.org/x/time v0.0.0-20180412165947-fbb02b2291d2 h1:+DCIGbF/swA92ohVg0//6X2IVY3KZs6p9mix0ziNYJM=
golang.org/x/time v0.0.0-20180412165947-fbb02b2291d2/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
google.golang.org/genproto v0.0.0-20180608181217-32ee49c4dd80 h1:GL7nK1hkDKrkor0eVOYcMdIsUGErFnaC2gpBOVC+vbI=
google.golang.org/genproto v0.0.0-20180608181217-32ee49c4dd80/go.mod h1:JiN7NxoALGmiZfu7CAH4rXhgtRTLTxftemlI0sWmxmc=
google.golang.org/grpc v1.14.0 h1:ArxJuB1NWfPY6r9Gp9gqwplT0Ge7nqv9msgu03lHLmo=
google.golang.org/grpc v1.14.0/go.mod h1:yo6s7OP7yaDglbqo1J04qKzAhqBH6lvTonzMVmEdcZw=
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gopkg.in/airbrake/gobrake.v2 v2.0.9/go.mod h1:/h5ZAUhDkGaJfjzjKLSjv6zCL6O0LLBxU4K+aSYdM/U=
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
gopkg.in/cheggaaa/pb.v1 v1.0.25/go.mod h1:V/YB90LKu/1FcN3WVnfiiE5oMCibMjukxqG/qStrOgw=
gopkg.in/fsnotify.v1 v1.4.7 h1:xOHLXZwVvI9hhs+cLKq5+I5onOuwQLhQwiu63xxlHs4=
gopkg.in/fsnotify.v1 v1.4.7/go.mod h1:Tz8NjZHkW78fSQdbUxIjBTcgA1z1m8ZHf0WmKUhAMys=
gopkg.in/gemnasium/logrus-airbrake-hook.v2 v2.1.2 h1:OAj3g0cR6Dx/R07QgQe8wkA9RNjB2u4i700xBkIT4e0=
gopkg.in/gemnasium/logrus-airbrake-hook.v2 v2.1.2/go.mod h1:Xk6kEKp8OKb+X14hQBKWaSkCsqBpgog8nAV2xsGOxlo=
gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7 h1:uRGJdciOHaEIrze2W8Q3AKkepLTh2hOroT7a+7czfdQ=
gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7/go.mod h1:dt/ZhP58zS4L8KSrWDmTeBkI65Dw0HsyUHuEVlX15mw=
gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
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// Copyright 2019 Sorint.lab
//
// 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.
package etcd
import (
"context"
"crypto/tls"
"net/url"
"strconv"
"strings"
"time"
"github.com/sorintlab/agola/internal/util"
"github.com/pkg/errors"
"go.etcd.io/etcd/clientv3"
etcdclientv3 "go.etcd.io/etcd/clientv3"
"go.etcd.io/etcd/clientv3/namespace"
"go.etcd.io/etcd/etcdserver/api/v3rpc/rpctypes"
"go.uber.org/zap"
)
var (
// ErrKeyNotFound is thrown when the key is not found in the store during a Get operation
ErrKeyNotFound = errors.New("key not found")
ErrKeyModified = errors.New("unable to complete atomic operation, key modified")
)
const (
defaultEndpoints = "http://127.0.0.1:2379"
compactKey = "compactkey"
defaultCompactionInterval = 10 * time.Minute
)
type WriteOptions struct {
TTL time.Duration
}
type Config struct {
Logger *zap.Logger
Endpoints string
Prefix string
CertFile string
KeyFile string
CAFile string
SkipTLSVerify bool
CompactionInterval time.Duration
}
func FromEtcdError(err error) error {
switch err {
case rpctypes.ErrKeyNotFound:
return ErrKeyNotFound
}
return err
}
type Store struct {
log *zap.SugaredLogger
c *etcdclientv3.Client
}
func New(cfg Config) (*Store, error) {
prefix := cfg.Prefix
if prefix != "" && !strings.HasSuffix(prefix, "/") {
prefix += "/"
}
endpointsStr := cfg.Endpoints
if endpointsStr == "" {
endpointsStr = defaultEndpoints
}
endpoints := strings.Split(endpointsStr, ",")
// check that all the endpoints have the same scheme
var scheme string
for _, e := range endpoints {
u, err := url.Parse(e)
if err != nil {
return nil, errors.Wrapf(err, "cannot parse endpoint %q", e)
}
if scheme == "" {
scheme = u.Scheme
}
if scheme != u.Scheme {
return nil, errors.Errorf("all the endpoints must have the same scheme")
}
}
var tlsConfig *tls.Config
if scheme != "http" && scheme != "https" {
return nil, errors.Errorf("endpoints scheme must be http or https")
}
if scheme == "https" {
var err error
tlsConfig, err = util.NewTLSConfig(cfg.CertFile, cfg.KeyFile, cfg.CAFile, cfg.SkipTLSVerify)
if err != nil {
return nil, errors.Wrapf(err, "cannot create tls config")
}
}
config := etcdclientv3.Config{
Endpoints: endpoints,
TLS: tlsConfig,
}
c, err := etcdclientv3.New(config)
if err != nil {
return nil, err
}
c.KV = namespace.NewKV(c.KV, prefix)
c.Watcher = namespace.NewWatcher(c.Watcher, prefix)
c.Lease = namespace.NewLease(c.Lease, prefix)
s := &Store{
log: cfg.Logger.Sugar(),
c: c,
}
compactionInterval := defaultCompactionInterval
if cfg.CompactionInterval != 0 {
compactionInterval = cfg.CompactionInterval
}
go s.compactor(context.TODO(), compactionInterval)
return s, nil
}
func (s *Store) Client() *etcdclientv3.Client {
return s.c
}
func (s *Store) Put(ctx context.Context, key string, value []byte, options *WriteOptions) (*etcdclientv3.PutResponse, error) {
etcdv3Options := []etcdclientv3.OpOption{}
if options != nil {
if options.TTL > 0 {
lease, err := s.c.Grant(ctx, int64(options.TTL.Seconds()))
if err != nil {
return nil, err
}
etcdv3Options = append(etcdv3Options, etcdclientv3.WithLease(lease.ID))
}
}
resp, err := s.c.Put(ctx, key, string(value), etcdv3Options...)
return resp, FromEtcdError(err)
}
func (s *Store) Get(ctx context.Context, key string) (*etcdclientv3.GetResponse, error) {
resp, err := s.c.Get(ctx, key)
if err != nil {
return resp, FromEtcdError(err)
}
if len(resp.Kvs) == 0 {
return resp, ErrKeyNotFound
}
return resp, nil
}
func (s *Store) List(ctx context.Context, directory, start string, revision int64) (*etcdclientv3.GetResponse, error) {
if !strings.HasSuffix(directory, "/") {
directory += "/"
}
key := directory
rangeEnd := clientv3.GetPrefixRangeEnd(key)
if start != "" {
key = start
}
opts := []etcdclientv3.OpOption{etcdclientv3.WithRange(rangeEnd)}
if revision != 0 {
opts = append(opts, etcdclientv3.WithRev(revision))
}
resp, err := s.c.Get(ctx, key, opts...)
return resp, FromEtcdError(err)
}
type ListPagedResp struct {
Resp *clientv3.GetResponse
HasMore bool
Continuation *ListPagedContinuation
}
type ListPagedContinuation struct {
Revision int64
LastKey string
}
func (s *Store) ListPaged(ctx context.Context, directory string, revision, limit int64, continuation *ListPagedContinuation) (*ListPagedResp, error) {
if !strings.HasSuffix(directory, "/") {
directory += "/"
}
key := directory
rangeEnd := clientv3.GetPrefixRangeEnd(key)
if continuation != nil {
revision = continuation.Revision
key = continuation.LastKey
}
opts := []etcdclientv3.OpOption{etcdclientv3.WithRange(rangeEnd), etcdclientv3.WithLimit(limit)}
if revision != 0 {
opts = append(opts, etcdclientv3.WithRev(revision))
}
resp, err := s.c.Get(ctx, key, opts...)
if err != nil {
return nil, FromEtcdError(err)
}
lastKey := key
if len(resp.Kvs) > 0 {
lastKey = string(resp.Kvs[len(resp.Kvs)-1].Key) + "\x00"
}
return &ListPagedResp{
Resp: resp,
HasMore: resp.More,
Continuation: &ListPagedContinuation{
Revision: resp.Header.Revision,
LastKey: lastKey,
},
}, nil
}
func (s *Store) AtomicPut(ctx context.Context, key string, value []byte, prevRevision int64, options *WriteOptions) (*etcdclientv3.TxnResponse, error) {
etcdv3Options := []etcdclientv3.OpOption{}
if options != nil {
if options.TTL > 0 {
lease, err := s.c.Grant(ctx, int64(options.TTL))
if err != nil {
return nil, err
}
etcdv3Options = append(etcdv3Options, etcdclientv3.WithLease(lease.ID))
}
}
var cmp etcdclientv3.Cmp
if prevRevision != 0 {
cmp = etcdclientv3.Compare(etcdclientv3.ModRevision(key), "=", int64(prevRevision))
} else {
// key must not exist
cmp = etcdclientv3.Compare(etcdclientv3.CreateRevision(key), "=", 0)
}
txn := s.c.Txn(ctx).If(cmp)
txn = txn.Then(etcdclientv3.OpPut(key, string(value), etcdv3Options...))
tresp, err := txn.Commit()
if err != nil {
return tresp, FromEtcdError(err)
}
if !tresp.Succeeded {
return tresp, ErrKeyModified
}
return tresp, nil
}
func (s *Store) Delete(ctx context.Context, key string) error {
_, err := s.c.Delete(ctx, key)
return err
}
func (s *Store) AtomicDelete(ctx context.Context, key string, revision int64) (*etcdclientv3.TxnResponse, error) {
cmp := etcdclientv3.Compare(etcdclientv3.ModRevision(key), "=", revision)
req := etcdclientv3.OpDelete(key)
tresp, err := s.c.Txn(ctx).If(cmp).Then(req).Commit()
if err != nil {
return tresp, FromEtcdError(err)
}
if !tresp.Succeeded {
return tresp, ErrKeyModified
}
return tresp, nil
}
func (s *Store) Watch(ctx context.Context, prefix string, revision int64) etcdclientv3.WatchChan {
etcdv3Options := []etcdclientv3.OpOption{clientv3.WithPrefix()}
if revision != 0 {
etcdv3Options = append(etcdv3Options, etcdclientv3.WithRev(revision))
}
return s.c.Watch(ctx, prefix, etcdv3Options...)
}
func (s *Store) Close() error {
return s.c.Close()
}
func (s *Store) compactor(ctx context.Context, interval time.Duration) {
var version int64
var rev int64
var err error
for {
select {
case <-time.After(interval):
case <-ctx.Done():
return
}
version, rev, err = s.compact(ctx, version, rev)
if err != nil {
continue
}
}
}
func (s *Store) compact(ctx context.Context, version, rev int64) (int64, int64, error) {
resp, err := s.c.KV.Txn(ctx).If(
clientv3.Compare(clientv3.Version(compactKey), "=", version),
).Then(
clientv3.OpPut(compactKey, strconv.FormatInt(rev, 10)),
).Else(
clientv3.OpGet(compactKey),
).Commit()
if err != nil {
return version, rev, err
}
curRev := resp.Header.Revision
if !resp.Succeeded {
curVersion := resp.Responses[0].GetResponseRange().Kvs[0].Version
return curVersion, curRev, nil
}
curVersion := version + 1
if rev == 0 {
return curVersion, curRev, nil
}
if _, err = s.c.Compact(ctx, rev); err != nil {
s.log.Warnf("compact error: %v", err)
return curVersion, curRev, err
}
s.log.Infof("compacted revision: %d", rev)
return curVersion, curRev, nil
}