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Implement Phase 1 of KAT #1

Merged
dubey merged 10 commits from phase1 into main 2025-05-16 20:19:26 -04:00
Conversation 0 Commits 10 Files Changed 14 +1152 -41
8 changed files with 1152 additions and 41 deletions
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Showing only changes of commit 54256fd34d - Show all commits

5
.gitignore vendored
View File

@@ -25,6 +25,7 @@ go.work.sum
.env .env
.DS_Store .DS_Store
kat-agent
katcall
.aider* .aider*
.local

8
Makefile
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@@ -2,7 +2,7 @@
.PHONY: all generate clean test .PHONY: all generate clean test
# Variables # Variables
GOLANGCI_LINT_VERSION := v1.55.2 # Or your preferred version GOLANGCI_LINT_VERSION := v1.55.2
all: generate test all: generate test
@@ -18,7 +18,7 @@ clean:
test: generate test: generate
@echo "Running tests..." @echo "Running tests..."
@go test ./... @go test -count=1 ./...
lint: lint:
@echo "Running linter..." @echo "Running linter..."
@@ -27,7 +27,3 @@ lint:
go install github.com/golangci/golangci-lint/cmd/golangci-lint@$(GOLANGCI_LINT_VERSION); \ go install github.com/golangci/golangci-lint/cmd/golangci-lint@$(GOLANGCI_LINT_VERSION); \
fi fi
@golangci-lint run @golangci-lint run
# Add to go.mod if not already present by go install
# go get google.golang.org/protobuf/cmd/protoc-gen-go
# go get google.golang.org/grpc/cmd/protoc-gen-go-grpc (if you plan to use gRPC services soon)

38
cmd/kat-agent/main.go
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@@ -7,11 +7,9 @@ import (
"os" "os"
"os/signal" "os/signal"
"path/filepath" "path/filepath"
// "strings" // Not used
"syscall" "syscall"
"time" "time"
pb "git.dws.rip/dubey/kat/api/v1alpha1"
"git.dws.rip/dubey/kat/internal/config" "git.dws.rip/dubey/kat/internal/config"
"git.dws.rip/dubey/kat/internal/leader" "git.dws.rip/dubey/kat/internal/leader"
"git.dws.rip/dubey/kat/internal/store" "git.dws.rip/dubey/kat/internal/store"
@@ -42,10 +40,9 @@ campaigns for leadership, and stores initial cluster configuration.`,
) )
const ( const (
clusterUIDKey = "/kat/config/cluster_uid" clusterUIDKey = "/kat/config/cluster_uid"
clusterConfigKey = "/kat/config/cluster_config" // Stores the JSON of pb.ClusterConfigurationSpec clusterConfigKey = "/kat/config/cluster_config" // Stores the JSON of pb.ClusterConfigurationSpec
defaultNodeName = "kat-node" defaultNodeName = "kat-node"
etcdDataDirDefault = "/var/lib/kat-agent/etcd"
) )
func init() { func init() {
@@ -84,11 +81,11 @@ func runInit(cmd *cobra.Command, args []string) {
peerURL := fmt.Sprintf("http://localhost:%d", parsedClusterConfig.Spec.EtcdPeerPort) peerURL := fmt.Sprintf("http://localhost:%d", parsedClusterConfig.Spec.EtcdPeerPort)
etcdEmbedCfg := store.EtcdEmbedConfig{ etcdEmbedCfg := store.EtcdEmbedConfig{
Name: nodeName, // Etcd member name Name: nodeName, // Etcd member name
DataDir: filepath.Join(etcdDataDirDefault, nodeName), // Ensure unique data dir DataDir: filepath.Join(os.Getenv("HOME"), ".kat-agent", nodeName), // Ensure unique data dir
ClientURLs: []string{clientURL}, // Listen on this for clients ClientURLs: []string{clientURL}, // Listen on this for clients
PeerURLs: []string{peerURL}, // Listen on this for peers PeerURLs: []string{peerURL}, // Listen on this for peers
InitialCluster: fmt.Sprintf("%s=%s", nodeName, peerURL), // For a new cluster, it's just itself InitialCluster: fmt.Sprintf("%s=%s", nodeName, peerURL), // For a new cluster, it's just itself
// ForceNewCluster should be true if we are certain this is a brand new cluster. // ForceNewCluster should be true if we are certain this is a brand new cluster.
// For simplicity in init, we might not set it and rely on empty data-dir. // For simplicity in init, we might not set it and rely on empty data-dir.
// embed.Config has ForceNewCluster field. // embed.Config has ForceNewCluster field.
@@ -141,7 +138,6 @@ func runInit(cmd *cobra.Command, args []string) {
log.Printf("Cluster UID already exists in etcd. Skipping storage.") log.Printf("Cluster UID already exists in etcd. Skipping storage.")
} }
// Store ClusterConfigurationSpec (as JSON) // Store ClusterConfigurationSpec (as JSON)
// We store Spec because Metadata might change (e.g. resourceVersion) // We store Spec because Metadata might change (e.g. resourceVersion)
// and is more for API object representation. // and is more for API object representation.
@@ -181,7 +177,6 @@ func runInit(cmd *cobra.Command, args []string) {
leadershipMgr.LeaseTTLSeconds = leader.DefaultLeaseTTLSeconds leadershipMgr.LeaseTTLSeconds = leader.DefaultLeaseTTLSeconds
} }
// Run leadership manager. This will block until ctx is cancelled. // Run leadership manager. This will block until ctx is cancelled.
go leadershipMgr.Run(ctx) go leadershipMgr.Run(ctx)
@@ -201,20 +196,3 @@ func main() {
os.Exit(1) os.Exit(1)
} }
} }
// Helper to check if a string is in a slice of strings (Not currently used)
// func containsString(slice []string, s string) bool {
// for _, item := range slice {
// if item == s {
// return true
// }
// }
// return false
// }
// SanitizeClusterConfigForStorage can be used if we want to strip sensitive fields
// or normalize the config before storing. For now, storing Spec as is.
// func SanitizeClusterConfigForStorage(config *pb.ClusterConfiguration) *pb.ClusterConfigurationSpec {
// // Example: return a copy with certain fields cleared if needed
// return config.Spec
// }

72
go.mod
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@@ -1,6 +1,6 @@
module git.dws.rip/dubey/kat module git.dws.rip/dubey/kat
go 1.22 go 1.23.0
toolchain go1.24.2 toolchain go1.24.2
@@ -8,3 +8,73 @@ require (
google.golang.org/protobuf v1.36.6 google.golang.org/protobuf v1.36.6
gopkg.in/yaml.v3 v3.0.1 gopkg.in/yaml.v3 v3.0.1
) )
require (
github.com/beorn7/perks v1.0.1 // indirect
github.com/cenkalti/backoff/v4 v4.2.1 // indirect
github.com/cespare/xxhash/v2 v2.2.0 // indirect
github.com/coreos/go-semver v0.3.0 // indirect
github.com/coreos/go-systemd/v22 v22.3.2 // indirect
github.com/davecgh/go-spew v1.1.1 // indirect
github.com/dustin/go-humanize v1.0.0 // indirect
github.com/go-logr/logr v1.3.0 // indirect
github.com/go-logr/stdr v1.2.2 // indirect
github.com/gogo/protobuf v1.3.2 // indirect
github.com/golang-jwt/jwt/v4 v4.5.2 // indirect
github.com/golang/groupcache v0.0.0-20210331224755-41bb18bfe9da // indirect
github.com/golang/protobuf v1.5.4 // indirect
github.com/google/btree v1.0.1 // indirect
github.com/google/uuid v1.6.0 // indirect
github.com/gorilla/websocket v1.4.2 // indirect
github.com/grpc-ecosystem/go-grpc-middleware v1.3.0 // indirect
github.com/grpc-ecosystem/go-grpc-prometheus v1.2.0 // indirect
github.com/grpc-ecosystem/grpc-gateway v1.16.0 // indirect
github.com/grpc-ecosystem/grpc-gateway/v2 v2.16.0 // indirect
github.com/inconshreveable/mousetrap v1.0.0 // indirect
github.com/jonboulle/clockwork v0.2.2 // indirect
github.com/json-iterator/go v1.1.11 // indirect
github.com/matttproud/golang_protobuf_extensions v1.0.1 // indirect
github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
github.com/modern-go/reflect2 v1.0.1 // indirect
github.com/prometheus/client_golang v1.11.1 // indirect
github.com/prometheus/client_model v0.2.0 // indirect
github.com/prometheus/common v0.26.0 // indirect
github.com/prometheus/procfs v0.6.0 // indirect
github.com/sirupsen/logrus v1.9.3 // indirect
github.com/soheilhy/cmux v0.1.5 // indirect
github.com/spf13/cobra v1.1.3 // indirect
github.com/spf13/pflag v1.0.5 // indirect
github.com/tmc/grpc-websocket-proxy v0.0.0-20201229170055-e5319fda7802 // indirect
github.com/xiang90/probing v0.0.0-20190116061207-43a291ad63a2 // indirect
go.etcd.io/bbolt v1.3.11 // indirect
go.etcd.io/etcd/api/v3 v3.5.21 // indirect
go.etcd.io/etcd/client/pkg/v3 v3.5.21 // indirect
go.etcd.io/etcd/client/v2 v2.305.21 // indirect
go.etcd.io/etcd/client/v3 v3.5.21 // indirect
go.etcd.io/etcd/pkg/v3 v3.5.21 // indirect
go.etcd.io/etcd/raft/v3 v3.5.21 // indirect
go.etcd.io/etcd/server/v3 v3.5.21 // indirect
go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc v0.46.0 // indirect
go.opentelemetry.io/otel v1.20.0 // indirect
go.opentelemetry.io/otel/exporters/otlp/otlptrace v1.20.0 // indirect
go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc v1.20.0 // indirect
go.opentelemetry.io/otel/metric v1.20.0 // indirect
go.opentelemetry.io/otel/sdk v1.20.0 // indirect
go.opentelemetry.io/otel/trace v1.20.0 // indirect
go.opentelemetry.io/proto/otlp v1.0.0 // indirect
go.uber.org/atomic v1.7.0 // indirect
go.uber.org/multierr v1.6.0 // indirect
go.uber.org/zap v1.17.0 // indirect
golang.org/x/crypto v0.36.0 // indirect
golang.org/x/net v0.38.0 // indirect
golang.org/x/sys v0.31.0 // indirect
golang.org/x/text v0.23.0 // indirect
golang.org/x/time v0.0.0-20210220033141-f8bda1e9f3ba // indirect
google.golang.org/genproto v0.0.0-20230822172742-b8732ec3820d // indirect
google.golang.org/genproto/googleapis/api v0.0.0-20230822172742-b8732ec3820d // indirect
google.golang.org/genproto/googleapis/rpc v0.0.0-20230822172742-b8732ec3820d // indirect
google.golang.org/grpc v1.59.0 // indirect
gopkg.in/natefinch/lumberjack.v2 v2.0.0 // indirect
gopkg.in/yaml.v2 v2.4.0 // indirect
sigs.k8s.io/yaml v1.2.0 // indirect
)

510
go.sum
View File

@@ -1,10 +1,520 @@
cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
cloud.google.com/go v0.38.0/go.mod h1:990N+gfupTy94rShfmMCWGDn0LpTmnzTp2qbd1dvSRU=
cloud.google.com/go v0.44.1/go.mod h1:iSa0KzasP4Uvy3f1mN/7PiObzGgflwredwwASm/v6AU=
cloud.google.com/go v0.44.2/go.mod h1:60680Gw3Yr4ikxnPRS/oxxkBccT6SA1yMk63TGekxKY=
cloud.google.com/go v0.45.1/go.mod h1:RpBamKRgapWJb87xiFSdk4g1CME7QZg3uwTez+TSTjc=
cloud.google.com/go v0.46.3/go.mod h1:a6bKKbmY7er1mI7TEI4lsAkts/mkhTSZK8w33B4RAg0=
cloud.google.com/go/bigquery v1.0.1/go.mod h1:i/xbL2UlR5RvWAURpBYZTtm/cXjCha9lbfbpx4poX+o=
cloud.google.com/go/datastore v1.0.0/go.mod h1:LXYbyblFSglQ5pkeyhO+Qmw7ukd3C+pD7TKLgZqpHYE=
cloud.google.com/go/firestore v1.1.0/go.mod h1:ulACoGHTpvq5r8rxGJ4ddJZBZqakUQqClKRT5SZwBmk=
cloud.google.com/go/pubsub v1.0.1/go.mod h1:R0Gpsv3s54REJCy4fxDixWD93lHJMoZTyQ2kNxGRt3I=
cloud.google.com/go/storage v1.0.0/go.mod h1:IhtSnM/ZTZV8YYJWCY8RULGVqBDmpoyjwiyrjsg+URw=
dmitri.shuralyov.com/gpu/mtl v0.0.0-20190408044501-666a987793e9/go.mod h1:H6x//7gZCb22OMCxBHrMx7a5I7Hp++hsVxbQ4BYO7hU=
github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
github.com/BurntSushi/xgb v0.0.0-20160522181843-27f122750802/go.mod h1:IVnqGOEym/WlBOVXweHU+Q+/VP0lqqI8lqeDx9IjBqo=
github.com/OneOfOne/xxhash v1.2.2/go.mod h1:HSdplMjZKSmBqAxg5vPj2TmRDmfkzw+cTzAElWljhcU=
github.com/alecthomas/template v0.0.0-20160405071501-a0175ee3bccc/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc=
github.com/alecthomas/template v0.0.0-20190718012654-fb15b899a751/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc=
github.com/alecthomas/units v0.0.0-20151022065526-2efee857e7cf/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
github.com/alecthomas/units v0.0.0-20190717042225-c3de453c63f4/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
github.com/alecthomas/units v0.0.0-20190924025748-f65c72e2690d/go.mod h1:rBZYJk541a8SKzHPHnH3zbiI+7dagKZ0cgpgrD7Fyho=
github.com/antihax/optional v1.0.0/go.mod h1:uupD/76wgC+ih3iEmQUL+0Ugr19nfwCT1kdvxnR2qWY=
github.com/armon/circbuf v0.0.0-20150827004946-bbbad097214e/go.mod h1:3U/XgcO3hCbHZ8TKRvWD2dDTCfh9M9ya+I9JpbB7O8o=
github.com/armon/go-metrics v0.0.0-20180917152333-f0300d1749da/go.mod h1:Q73ZrmVTwzkszR9V5SSuryQ31EELlFMUz1kKyl939pY=
github.com/armon/go-radix v0.0.0-20180808171621-7fddfc383310/go.mod h1:ufUuZ+zHj4x4TnLV4JWEpy2hxWSpsRywHrMgIH9cCH8=
github.com/beorn7/perks v0.0.0-20180321164747-3a771d992973/go.mod h1:Dwedo/Wpr24TaqPxmxbtue+5NUziq4I4S80YR8gNf3Q=
github.com/beorn7/perks v1.0.0/go.mod h1:KWe93zE9D1o94FZ5RNwFwVgaQK1VOXiVxmqh+CedLV8=
github.com/beorn7/perks v1.0.1 h1:VlbKKnNfV8bJzeqoa4cOKqO6bYr3WgKZxO8Z16+hsOM=
github.com/beorn7/perks v1.0.1/go.mod h1:G2ZrVWU2WbWT9wwq4/hrbKbnv/1ERSJQ0ibhJ6rlkpw=
github.com/bgentry/speakeasy v0.1.0/go.mod h1:+zsyZBPWlz7T6j88CTgSN5bM796AkVf0kBD4zp0CCIs=
github.com/bketelsen/crypt v0.0.3-0.20200106085610-5cbc8cc4026c/go.mod h1:MKsuJmJgSg28kpZDP6UIiPt0e0Oz0kqKNGyRaWEPv84=
github.com/cenkalti/backoff/v4 v4.2.1 h1:y4OZtCnogmCPw98Zjyt5a6+QwPLGkiQsYW5oUqylYbM=
github.com/cenkalti/backoff/v4 v4.2.1/go.mod h1:Y3VNntkOUPxTVeUxJ/G5vcM//AlwfmyYozVcomhLiZE=
github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU=
github.com/cespare/xxhash v1.1.0/go.mod h1:XrSqR1VqqWfGrhpAt58auRo0WTKS1nRRg3ghfAqPWnc=
github.com/cespare/xxhash/v2 v2.1.1/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
github.com/cespare/xxhash/v2 v2.2.0 h1:DC2CZ1Ep5Y4k3ZQ899DldepgrayRUGE6BBZ/cd9Cj44=
github.com/cespare/xxhash/v2 v2.2.0/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
github.com/cncf/udpa/go v0.0.0-20191209042840-269d4d468f6f/go.mod h1:M8M6+tZqaGXZJjfX53e64911xZQV5JYwmTeXPW+k8Sc=
github.com/coreos/bbolt v1.3.2/go.mod h1:iRUV2dpdMOn7Bo10OQBFzIJO9kkE559Wcmn+qkEiiKk=
github.com/coreos/etcd v3.3.13+incompatible/go.mod h1:uF7uidLiAD3TWHmW31ZFd/JWoc32PjwdhPthX9715RE=
github.com/coreos/go-semver v0.3.0 h1:wkHLiw0WNATZnSG7epLsujiMCgPAc9xhjJ4tgnAxmfM=
github.com/coreos/go-semver v0.3.0/go.mod h1:nnelYz7RCh+5ahJtPPxZlU+153eP4D4r3EedlOD2RNk=
github.com/coreos/go-systemd v0.0.0-20190321100706-95778dfbb74e/go.mod h1:F5haX7vjVVG0kc13fIWeqUViNPyEJxv/OmvnBo0Yme4=
github.com/coreos/go-systemd/v22 v22.3.2 h1:D9/bQk5vlXQFZ6Kwuu6zaiXJ9oTPe68++AzAJc1DzSI=
github.com/coreos/go-systemd/v22 v22.3.2/go.mod h1:Y58oyj3AT4RCenI/lSvhwexgC+NSVTIJ3seZv2GcEnc=
github.com/coreos/pkg v0.0.0-20180928190104-399ea9e2e55f/go.mod h1:E3G3o1h8I7cfcXa63jLwjI0eiQQMgzzUDFVpN/nH/eA=
github.com/cpuguy83/go-md2man/v2 v2.0.0/go.mod h1:maD7wRr/U5Z6m/iR4s+kqSMx2CaBsrgA7czyZG/E6dU=
github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
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/go.mod h1:E3ru+11k8xSBh+hMPgOLZmtrrCbhqsmaPHjLKYnJCaQ=
github.com/dgryski/go-sip13 v0.0.0-20181026042036-e10d5fee7954/go.mod h1:vAd38F8PWV+bWy6jNmig1y/TA+kYO4g3RSRF0IAv0no=
github.com/dustin/go-humanize v1.0.0 h1:VSnTsYCnlFHaM2/igO1h6X3HA71jcobQuxemgkq4zYo=
github.com/dustin/go-humanize v1.0.0/go.mod h1:HtrtbFcZ19U5GC7JDqmcUSB87Iq5E25KnS6fMYU6eOk=
github.com/envoyproxy/go-control-plane v0.9.0/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4=
github.com/envoyproxy/go-control-plane v0.9.1-0.20191026205805-5f8ba28d4473/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4=
github.com/envoyproxy/go-control-plane v0.9.4/go.mod h1:6rpuAdCZL397s3pYoYcLgu1mIlRU8Am5FuJP05cCM98=
github.com/envoyproxy/protoc-gen-validate v0.1.0/go.mod h1:iSmxcyjqTsJpI2R4NaDN7+kN2VEUnK/pcBlmesArF7c=
github.com/fatih/color v1.7.0/go.mod h1:Zm6kSWBoL9eyXnKyktHP6abPY2pDugNf5KwzbycvMj4=
github.com/fsnotify/fsnotify v1.4.7/go.mod h1:jwhsz4b93w/PPRr/qN1Yymfu8t87LnFCMoQvtojpjFo=
github.com/ghodss/yaml v1.0.0/go.mod h1:4dBDuWmgqj2HViK6kFavaiC9ZROes6MMH2rRYeMEF04=
github.com/go-gl/glfw v0.0.0-20190409004039-e6da0acd62b1/go.mod h1:vR7hzQXu2zJy9AVAgeJqvqgH9Q5CA+iKCZ2gyEVpxRU=
github.com/go-kit/kit v0.8.0/go.mod h1:xBxKIO96dXMWWy0MnWVtmwkA9/13aqxPnvrjFYMA2as=
github.com/go-kit/kit v0.9.0/go.mod h1:xBxKIO96dXMWWy0MnWVtmwkA9/13aqxPnvrjFYMA2as=
github.com/go-kit/log v0.1.0/go.mod h1:zbhenjAZHb184qTLMA9ZjW7ThYL0H2mk7Q6pNt4vbaY=
github.com/go-logfmt/logfmt v0.3.0/go.mod h1:Qt1PoO58o5twSAckw1HlFXLmHsOX5/0LbT9GBnD5lWE=
github.com/go-logfmt/logfmt v0.4.0/go.mod h1:3RMwSq7FuexP4Kalkev3ejPJsZTpXXBr9+V4qmtdjCk=
github.com/go-logfmt/logfmt v0.5.0/go.mod h1:wCYkCAKZfumFQihp8CzCvQ3paCTfi41vtzG1KdI/P7A=
github.com/go-logr/logr v1.2.2/go.mod h1:jdQByPbusPIv2/zmleS9BjJVeZ6kBagPoEUsqbVz/1A=
github.com/go-logr/logr v1.3.0 h1:2y3SDp0ZXuc6/cjLSZ+Q3ir+QB9T/iG5yYRXqsagWSY=
github.com/go-logr/logr v1.3.0/go.mod h1:9T104GzyrTigFIr8wt5mBrctHMim0Nb2HLGrmQ40KvY=
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go.etcd.io/etcd/raft/v3 v3.5.21 h1:dOmE0mT55dIUsX77TKBLq+RgyumsQuYeiRQnW/ylugk=
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go.opentelemetry.io/otel v1.20.0/go.mod h1:oUIGj3D77RwJdM6PPZImDpSZGDvkD9fhesHny69JFrs=
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go.opentelemetry.io/otel/exporters/otlp/otlptrace v1.20.0/go.mod h1:GijYcYmNpX1KazD5JmWGsi4P7dDTTTnfv1UbGn84MnU=
go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc v1.20.0 h1:gvmNvqrPYovvyRmCSygkUDyL8lC5Tl845MLEwqpxhEU=
go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc v1.20.0/go.mod h1:vNUq47TGFioo+ffTSnKNdob241vePmtNZnAODKapKd0=
go.opentelemetry.io/otel/metric v1.20.0 h1:ZlrO8Hu9+GAhnepmRGhSU7/VkpjrNowxRN9GyKR4wzA=
go.opentelemetry.io/otel/metric v1.20.0/go.mod h1:90DRw3nfK4D7Sm/75yQ00gTJxtkBxX+wu6YaNymbpVM=
go.opentelemetry.io/otel/sdk v1.20.0 h1:5Jf6imeFZlZtKv9Qbo6qt2ZkmWtdWx/wzcCbNUlAWGM=
go.opentelemetry.io/otel/sdk v1.20.0/go.mod h1:rmkSx1cZCm/tn16iWDn1GQbLtsW/LvsdEEFzCSRM6V0=
go.opentelemetry.io/otel/trace v1.20.0 h1:+yxVAPZPbQhbC3OfAkeIVTky6iTFpcr4SiY9om7mXSQ=
go.opentelemetry.io/otel/trace v1.20.0/go.mod h1:HJSK7F/hA5RlzpZ0zKDCHCDHm556LCDtKaAo6JmBFUU=
go.opentelemetry.io/proto/otlp v1.0.0 h1:T0TX0tmXU8a3CbNXzEKGeU5mIVOdf0oykP+u2lIVU/I=
go.opentelemetry.io/proto/otlp v1.0.0/go.mod h1:Sy6pihPLfYHkr3NkUbEhGHFhINUSI/v80hjKIs5JXpM=
go.uber.org/atomic v1.4.0/go.mod h1:gD2HeocX3+yG+ygLZcrzQJaqmWj9AIm7n08wl/qW/PE=
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go.uber.org/atomic v1.7.0/go.mod h1:fEN4uk6kAWBTFdckzkM89CLk9XfWZrxpCo0nPH17wJc=
go.uber.org/multierr v1.1.0/go.mod h1:wR5kodmAFQ0UK8QlbwjlSNy0Z68gJhDJUG5sjR94q/0=
go.uber.org/multierr v1.6.0 h1:y6IPFStTAIT5Ytl7/XYmHvzXQ7S3g/IeZW9hyZ5thw4=
go.uber.org/multierr v1.6.0/go.mod h1:cdWPpRnG4AhwMwsgIHip0KRBQjJy5kYEpYjJxpXp9iU=
go.uber.org/zap v1.10.0/go.mod h1:vwi/ZaCAaUcBkycHslxD9B2zi4UTXhF60s6SWpuDF0Q=
go.uber.org/zap v1.17.0 h1:MTjgFu6ZLKvY6Pvaqk97GlxNBuMpV4Hy/3P6tRGlI2U=
go.uber.org/zap v1.17.0/go.mod h1:MXVU+bhUf/A7Xi2HNOnopQOrmycQ5Ih87HtOu4q5SSo=
golang.org/x/crypto v0.0.0-20180904163835-0709b304e793/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
golang.org/x/crypto v0.0.0-20181029021203-45a5f77698d3/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
golang.org/x/crypto v0.0.0-20190510104115-cbcb75029529/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
golang.org/x/crypto v0.0.0-20190605123033-f99c8df09eb5/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
golang.org/x/crypto v0.36.0 h1:AnAEvhDddvBdpY+uR+MyHmuZzzNqXSe/GvuDeob5L34=
golang.org/x/crypto v0.36.0/go.mod h1:Y4J0ReaxCR1IMaabaSMugxJES1EpwhBHhv2bDHklZvc=
golang.org/x/exp v0.0.0-20190121172915-509febef88a4/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
golang.org/x/exp v0.0.0-20190306152737-a1d7652674e8/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
golang.org/x/exp v0.0.0-20190510132918-efd6b22b2522/go.mod h1:ZjyILWgesfNpC6sMxTJOJm9Kp84zZh5NQWvqDGG3Qr8=
golang.org/x/exp v0.0.0-20190829153037-c13cbed26979/go.mod h1:86+5VVa7VpoJ4kLfm080zCjGlMRFzhUhsZKEZO7MGek=
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google.golang.org/appengine v1.4.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
google.golang.org/appengine v1.5.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
google.golang.org/appengine v1.6.1/go.mod h1:i06prIuMbXzDqacNJfV5OdTW448YApPu5ww/cMBSeb0=
google.golang.org/genproto v0.0.0-20180817151627-c66870c02cf8/go.mod h1:JiN7NxoALGmiZfu7CAH4rXhgtRTLTxftemlI0sWmxmc=
google.golang.org/genproto v0.0.0-20190307195333-5fe7a883aa19/go.mod h1:VzzqZJRnGkLBvHegQrXjBqPurQTc5/KpmUdxsrq26oE=
google.golang.org/genproto v0.0.0-20190418145605-e7d98fc518a7/go.mod h1:VzzqZJRnGkLBvHegQrXjBqPurQTc5/KpmUdxsrq26oE=
google.golang.org/genproto v0.0.0-20190425155659-357c62f0e4bb/go.mod h1:VzzqZJRnGkLBvHegQrXjBqPurQTc5/KpmUdxsrq26oE=
google.golang.org/genproto v0.0.0-20190502173448-54afdca5d873/go.mod h1:VzzqZJRnGkLBvHegQrXjBqPurQTc5/KpmUdxsrq26oE=
google.golang.org/genproto v0.0.0-20190801165951-fa694d86fc64/go.mod h1:DMBHOl98Agz4BDEuKkezgsaosCRResVns1a3J2ZsMNc=
google.golang.org/genproto v0.0.0-20190819201941-24fa4b261c55/go.mod h1:DMBHOl98Agz4BDEuKkezgsaosCRResVns1a3J2ZsMNc=
google.golang.org/genproto v0.0.0-20190911173649-1774047e7e51/go.mod h1:IbNlFCBrqXvoKpeg0TB2l7cyZUmoaFKYIwrEpbDKLA8=
google.golang.org/genproto v0.0.0-20191108220845-16a3f7862a1a/go.mod h1:n3cpQtvxv34hfy77yVDNjmbRyujviMdxYliBSkLhpCc=
google.golang.org/genproto v0.0.0-20200423170343-7949de9c1215/go.mod h1:55QSHmfGQM9UVYDPBsyGGes0y52j32PQ3BqQfXhyH3c=
google.golang.org/genproto v0.0.0-20200513103714-09dca8ec2884/go.mod h1:55QSHmfGQM9UVYDPBsyGGes0y52j32PQ3BqQfXhyH3c=
google.golang.org/genproto v0.0.0-20230822172742-b8732ec3820d h1:VBu5YqKPv6XiJ199exd8Br+Aetz+o08F+PLMnwJQHAY=
google.golang.org/genproto v0.0.0-20230822172742-b8732ec3820d/go.mod h1:yZTlhN0tQnXo3h00fuXNCxJdLdIdnVFVBaRJ5LWBbw4=
google.golang.org/genproto/googleapis/api v0.0.0-20230822172742-b8732ec3820d h1:DoPTO70H+bcDXcd39vOqb2viZxgqeBeSGtZ55yZU4/Q=
google.golang.org/genproto/googleapis/api v0.0.0-20230822172742-b8732ec3820d/go.mod h1:KjSP20unUpOx5kyQUFa7k4OJg0qeJ7DEZflGDu2p6Bk=
google.golang.org/genproto/googleapis/rpc v0.0.0-20230822172742-b8732ec3820d h1:uvYuEyMHKNt+lT4K3bN6fGswmK8qSvcreM3BwjDh+y4=
google.golang.org/genproto/googleapis/rpc v0.0.0-20230822172742-b8732ec3820d/go.mod h1:+Bk1OCOj40wS2hwAMA+aCW9ypzm63QTBBHp6lQ3p+9M=
google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c=
google.golang.org/grpc v1.20.1/go.mod h1:10oTOabMzJvdu6/UiuZezV6QK5dSlG84ov/aaiqXj38=
google.golang.org/grpc v1.21.1/go.mod h1:oYelfM1adQP15Ek0mdvEgi9Df8B9CZIaU1084ijfRaM=
google.golang.org/grpc v1.23.0/go.mod h1:Y5yQAOtifL1yxbo5wqy6BxZv8vAUGQwXBOALyacEbxg=
google.golang.org/grpc v1.25.1/go.mod h1:c3i+UQWmh7LiEpx4sFZnkU36qjEYZ0imhYfXVyQciAY=
google.golang.org/grpc v1.27.0/go.mod h1:qbnxyOmOxrQa7FizSgH+ReBfzJrCY1pSN7KXBS8abTk=
google.golang.org/grpc v1.29.1/go.mod h1:itym6AZVZYACWQqET3MqgPpjcuV5QH3BxFS3IjizoKk=
google.golang.org/grpc v1.33.1/go.mod h1:fr5YgcSWrqhRRxogOsw7RzIpsmvOZ6IcH4kBYTpR3n0=
google.golang.org/grpc v1.59.0 h1:Z5Iec2pjwb+LEOqzpB2MR12/eKFhDPhuqW91O+4bwUk=
google.golang.org/grpc v1.59.0/go.mod h1:aUPDwccQo6OTjy7Hct4AfBPD1GptF4fyUjIkQ9YtF98=
google.golang.org/protobuf v0.0.0-20200109180630-ec00e32a8dfd/go.mod h1:DFci5gLYBciE7Vtevhsrf46CRTquxDuWsQurQQe4oz8=
google.golang.org/protobuf v0.0.0-20200221191635-4d8936d0db64/go.mod h1:kwYJMbMJ01Woi6D6+Kah6886xMZcty6N08ah7+eCXa0=
google.golang.org/protobuf v0.0.0-20200228230310-ab0ca4ff8a60/go.mod h1:cfTl7dwQJ+fmap5saPgwCLgHXTUD7jkjRqWcaiX5VyM=
google.golang.org/protobuf v1.20.1-0.20200309200217-e05f789c0967/go.mod h1:A+miEFZTKqfCUM6K7xSMQL9OKL/b6hQv+e19PK+JZNE=
google.golang.org/protobuf v1.21.0/go.mod h1:47Nbq4nVaFHyn7ilMalzfO3qCViNmqZ2kzikPIcrTAo=
google.golang.org/protobuf v1.23.0/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp09yW+WbY/TyQbw=
google.golang.org/protobuf v1.36.6 h1:z1NpPI8ku2WgiWnf+t9wTPsn6eP1L7ksHUlkfLvd9xY= google.golang.org/protobuf v1.36.6 h1:z1NpPI8ku2WgiWnf+t9wTPsn6eP1L7ksHUlkfLvd9xY=
google.golang.org/protobuf v1.36.6/go.mod h1:jduwjTPXsFjZGTmRluh+L6NjiWu7pchiJ2/5YcXBHnY= google.golang.org/protobuf v1.36.6/go.mod h1:jduwjTPXsFjZGTmRluh+L6NjiWu7pchiJ2/5YcXBHnY=
gopkg.in/alecthomas/kingpin.v2 v2.2.6/go.mod h1:FMv+mEhP44yOT+4EoQTLFTRgOQ1FBLkstjWtayDeSgw=
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM= 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/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
gopkg.in/errgo.v2 v2.1.0/go.mod h1:hNsd1EY+bozCKY1Ytp96fpM3vjJbqLJn88ws8XvfDNI=
gopkg.in/ini.v1 v1.51.0/go.mod h1:pNLf8WUiyNEtQjuu5G5vTm06TEv9tsIgeAvK8hOrP4k=
gopkg.in/natefinch/lumberjack.v2 v2.0.0 h1:1Lc07Kr7qY4U2YPouBjpCLxpiyxIVoxqXgkXLknAOE8=
gopkg.in/natefinch/lumberjack.v2 v2.0.0/go.mod h1:l0ndWWf7gzL7RNwBG7wST/UCcT4T24xpD6X8LsfU/+k=
gopkg.in/resty.v1 v1.12.0/go.mod h1:mDo4pnntr5jdWRML875a/NmxYqAlA73dVijT2AXvQQo=
gopkg.in/yaml.v2 v2.0.0-20170812160011-eb3733d160e7/go.mod h1:JAlM8MvJe8wmxCU4Bli9HhUf9+ttbYbLASfIpnQbh74=
gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
gopkg.in/yaml.v2 v2.2.3/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
gopkg.in/yaml.v2 v2.2.4/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
gopkg.in/yaml.v2 v2.2.5/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
gopkg.in/yaml.v2 v2.2.8/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
gopkg.in/yaml.v2 v2.3.0/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
gopkg.in/yaml.v2 v2.4.0 h1:D8xgwECY7CYvx+Y2n4sBz93Jn9JRvxdiyyo8CTfuKaY=
gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=
gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA= gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM= gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
honnef.co/go/tools v0.0.0-20190106161140-3f1c8253044a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
honnef.co/go/tools v0.0.0-20190418001031-e561f6794a2a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
honnef.co/go/tools v0.0.1-2019.2.3/go.mod h1:a3bituU0lyd329TUQxRnasdCoJDkEUEAqEt0JzvZhAg=
rsc.io/binaryregexp v0.2.0/go.mod h1:qTv7/COck+e2FymRvadv62gMdZztPaShugOCi3I+8D8=
sigs.k8s.io/yaml v1.2.0 h1:kr/MCeFWJWTwyaHoR9c8EjH9OumOmoF9YGiZd7lFm/Q=
sigs.k8s.io/yaml v1.2.0/go.mod h1:yfXDCHCao9+ENCvLSE62v9VSji2MKu5jeNfTrofGhJc=

3
internal/config/parse.go
View File

@@ -7,6 +7,7 @@ import (
"os" "os"
pb "git.dws.rip/dubey/kat/api/v1alpha1" pb "git.dws.rip/dubey/kat/api/v1alpha1"
"github.com/davecgh/go-spew/spew"
"gopkg.in/yaml.v3" "gopkg.in/yaml.v3"
"encoding/json" "encoding/json"
@@ -64,6 +65,8 @@ func ParseClusterConfiguration(filePath string) (*pb.ClusterConfiguration, error
return nil, fmt.Errorf("failed to unmarshal spec into proto: %w", err) return nil, fmt.Errorf("failed to unmarshal spec into proto: %w", err)
} }
spew.Dump(&config) // For debugging, remove in production
SetClusterConfigDefaults(&config) SetClusterConfigDefaults(&config)
if err := ValidateClusterConfiguration(&config); err != nil { if err := ValidateClusterConfiguration(&config); err != nil {

464
internal/store/etcd.go Normal file
View File

@@ -0,0 +1,464 @@
package store
import (
"context"
"fmt"
"log"
"net/url"
"sync"
"time"
"go.etcd.io/etcd/client/v3/concurrency"
"go.etcd.io/etcd/server/v3/embed"
"go.etcd.io/etcd/server/v3/etcdserver/api/v3client"
clientv3 "go.etcd.io/etcd/client/v3"
)
const (
defaultDialTimeout = 5 * time.Second
defaultRequestTimeout = 5 * time.Second
leaderElectionPrefix = "/kat/leader_election/"
)
// EtcdEmbedConfig holds configuration for an embedded etcd server.
type EtcdEmbedConfig struct {
Name string
DataDir string
ClientURLs []string // URLs for client communication
PeerURLs []string // URLs for peer communication
InitialCluster string // e.g., "node1=http://localhost:2380"
// Add other etcd config fields as needed: LogLevel, etc.
}
// EtcdStore implements the StateStore interface using etcd.
type EtcdStore struct {
client *clientv3.Client
etcdServer *embed.Etcd // Holds the embedded server instance, if any
// For leadership
session *concurrency.Session
election *concurrency.Election
leaderID string
leaseTTL int64
campaignCtx context.Context
campaignDone func() // Cancels campaignCtx
resignMutex sync.Mutex // Protects session and election during resign
}
// StartEmbeddedEtcd starts an embedded etcd server based on the provided config.
func StartEmbeddedEtcd(cfg EtcdEmbedConfig) (*embed.Etcd, error) {
embedCfg := embed.NewConfig()
embedCfg.Name = cfg.Name
embedCfg.Dir = cfg.DataDir
embedCfg.InitialClusterToken = "kat-etcd-cluster" // Make this configurable if needed
embedCfg.InitialCluster = cfg.InitialCluster
embedCfg.ForceNewCluster = false // Set to true only for initial bootstrap of a new cluster if needed
lpurl, err := parseURLs(cfg.PeerURLs)
if err != nil {
return nil, fmt.Errorf("invalid peer URLs: %w", err)
}
embedCfg.ListenPeerUrls = lpurl
lcurl, err := parseURLs(cfg.ClientURLs)
if err != nil {
return nil, fmt.Errorf("invalid client URLs: %w", err)
}
embedCfg.ListenClientUrls = lcurl
// TODO: Configure logging, metrics, etc. for embedded etcd
// embedCfg.Logger = "zap"
// embedCfg.LogLevel = "info"
e, err := embed.StartEtcd(embedCfg)
if err != nil {
return nil, fmt.Errorf("failed to start embedded etcd: %w", err)
}
select {
case <-e.Server.ReadyNotify():
log.Printf("Embedded etcd server is ready (name: %s)", cfg.Name)
case <-time.After(60 * time.Second): // Adjust timeout as needed
e.Server.Stop() // trigger a shutdown
return nil, fmt.Errorf("embedded etcd server took too long to start")
}
return e, nil
}
func parseURLs(urlsStr []string) ([]url.URL, error) {
urls := make([]url.URL, len(urlsStr))
for i, s := range urlsStr {
u, err := url.Parse(s)
if err != nil {
return nil, fmt.Errorf("parsing URL '%s': %w", s, err)
}
urls[i] = *u
}
return urls, nil
}
// NewEtcdStore creates a new EtcdStore.
// If etcdServer is not nil, it assumes it's managing an embedded server.
// endpoints are the etcd client endpoints.
func NewEtcdStore(endpoints []string, etcdServer *embed.Etcd) (*EtcdStore, error) {
var cli *clientv3.Client
var err error
if etcdServer != nil {
// If embedded server is provided, use its client directly
cli = v3client.New(etcdServer.Server)
} else {
cli, err = clientv3.New(clientv3.Config{
Endpoints: endpoints,
DialTimeout: defaultDialTimeout,
// TODO: Add TLS config if connecting to secure external etcd
})
if err != nil {
return nil, fmt.Errorf("failed to create etcd client: %w", err)
}
}
return &EtcdStore{
client: cli,
etcdServer: etcdServer,
}, nil
}
func (s *EtcdStore) Put(ctx context.Context, key string, value []byte) error {
reqCtx, cancel := context.WithTimeout(ctx, defaultRequestTimeout)
defer cancel()
_, err := s.client.Put(reqCtx, key, string(value))
return err
}
func (s *EtcdStore) Get(ctx context.Context, key string) (*KV, error) {
reqCtx, cancel := context.WithTimeout(ctx, defaultRequestTimeout)
defer cancel()
resp, err := s.client.Get(reqCtx, key)
if err != nil {
return nil, err
}
if len(resp.Kvs) == 0 {
return nil, fmt.Errorf("key not found: %s", key) // Or a specific error type
}
kv := resp.Kvs[0]
return &KV{
Key: string(kv.Key),
Value: kv.Value,
Version: kv.ModRevision,
}, nil
}
func (s *EtcdStore) Delete(ctx context.Context, key string) error {
reqCtx, cancel := context.WithTimeout(ctx, defaultRequestTimeout)
defer cancel()
_, err := s.client.Delete(reqCtx, key)
return err
}
func (s *EtcdStore) List(ctx context.Context, prefix string) ([]KV, error) {
reqCtx, cancel := context.WithTimeout(ctx, defaultRequestTimeout)
defer cancel()
resp, err := s.client.Get(reqCtx, prefix, clientv3.WithPrefix())
if err != nil {
return nil, err
}
kvs := make([]KV, len(resp.Kvs))
for i, etcdKv := range resp.Kvs {
kvs[i] = KV{
Key: string(etcdKv.Key),
Value: etcdKv.Value,
Version: etcdKv.ModRevision,
}
}
return kvs, nil
}
func (s *EtcdStore) Watch(ctx context.Context, keyOrPrefix string, startRevision int64) (<-chan WatchEvent, error) {
watchChan := make(chan WatchEvent)
opts := []clientv3.OpOption{clientv3.WithPrefix()}
if startRevision > 0 {
opts = append(opts, clientv3.WithRev(startRevision))
}
etcdWatchChan := s.client.Watch(ctx, keyOrPrefix, opts...)
go func() {
defer close(watchChan)
for resp := range etcdWatchChan {
if err := resp.Err(); err != nil {
log.Printf("EtcdStore watch error: %v", err)
// Depending on error, might need to signal channel consumer
return
}
for _, ev := range resp.Events {
event := WatchEvent{
KV: KV{
Key: string(ev.Kv.Key),
Value: ev.Kv.Value,
Version: ev.Kv.ModRevision,
},
}
if ev.PrevKv != nil {
event.PrevKV = &KV{
Key: string(ev.PrevKv.Key),
Value: ev.PrevKv.Value,
Version: ev.PrevKv.ModRevision,
}
}
switch ev.Type {
case clientv3.EventTypePut:
event.Type = EventTypePut
case clientv3.EventTypeDelete:
event.Type = EventTypeDelete
default:
log.Printf("EtcdStore unknown event type: %v", ev.Type)
continue
}
select {
case watchChan <- event:
case <-ctx.Done():
log.Printf("EtcdStore watch context cancelled for %s", keyOrPrefix)
return
}
}
}
}()
return watchChan, nil
}
func (s *EtcdStore) Close() error {
s.resignMutex.Lock()
if s.session != nil {
// Attempt to close session gracefully, which should also resign from election
// if campaign was active.
s.session.Close() // This is synchronous
s.session = nil
s.election = nil
if s.campaignDone != nil {
s.campaignDone() // Ensure leadership context is cancelled
s.campaignDone = nil
}
}
s.resignMutex.Unlock()
var clientErr error
if s.client != nil {
clientErr = s.client.Close()
}
if s.etcdServer != nil {
s.etcdServer.Close() // This stops the embedded server
}
if clientErr != nil {
return fmt.Errorf("error closing etcd client: %w", clientErr)
}
return nil
}
func (s *EtcdStore) Campaign(ctx context.Context, leaderID string, leaseTTLSeconds int64) (leadershipCtx context.Context, err error) {
s.resignMutex.Lock()
defer s.resignMutex.Unlock()
if s.session != nil {
return nil, fmt.Errorf("campaign already in progress or session active")
}
s.leaderID = leaderID
s.leaseTTL = leaseTTLSeconds
// Create a new session
session, err := concurrency.NewSession(s.client, concurrency.WithTTL(int(leaseTTLSeconds)))
if err != nil {
return nil, fmt.Errorf("failed to create etcd session: %w", err)
}
s.session = session
election := concurrency.NewElection(session, leaderElectionPrefix)
s.election = election
// Create a cancellable context for this campaign attempt
// This context will be returned and is cancelled when leadership is lost or Resign is called.
campaignSpecificCtx, cancelCampaignSpecificCtx := context.WithCancel(ctx)
s.campaignCtx = campaignSpecificCtx
s.campaignDone = cancelCampaignSpecificCtx
go func() {
defer func() {
// This block ensures that if the campaign goroutine exits for any reason
// (e.g. session.Done(), campaign error, context cancellation),
// the leadership context is cancelled.
s.resignMutex.Lock()
if s.campaignDone != nil { // Check if not already resigned
s.campaignDone()
s.campaignDone = nil // Prevent double cancel
}
// Clean up session if it's still this one
if s.session == session {
s.session.Close() // Attempt to close the session
s.session = nil
s.election = nil
}
s.resignMutex.Unlock()
}()
// Campaign for leadership in a blocking way
// The campaignCtx (parent context) can cancel this.
if err := election.Campaign(s.campaignCtx, leaderID); err != nil {
log.Printf("Error during leadership campaign for %s: %v", leaderID, err)
// Error here usually means context cancelled or session closed.
return
}
// If Campaign returns without error, it means we are elected.
// Keep leadership context alive until session is done or campaignCtx is cancelled.
log.Printf("Successfully campaigned, %s is now leader", leaderID)
// Monitor the session; if it closes, leadership is lost.
select {
case <-session.Done():
log.Printf("Etcd session closed for leader %s, leadership lost", leaderID)
case <-s.campaignCtx.Done(): // This is campaignSpecificCtx
log.Printf("Leadership campaign context cancelled for %s", leaderID)
}
}()
return s.campaignCtx, nil
}
func (s *EtcdStore) Resign(ctx context.Context) error {
s.resignMutex.Lock()
defer s.resignMutex.Unlock()
if s.election == nil || s.session == nil {
log.Println("Resign called but not currently leading or no active session.")
return nil // Not an error to resign if not leading
}
log.Printf("Resigning leadership for %s", s.leaderID)
// Cancel the leadership context
if s.campaignDone != nil {
s.campaignDone()
s.campaignDone = nil
}
// Resign from the election. This is a best-effort.
// The context passed to Resign should be short-lived.
resignCtx, cancel := context.WithTimeout(context.Background(), defaultRequestTimeout)
defer cancel()
if err := s.election.Resign(resignCtx); err != nil {
log.Printf("Error resigning from election: %v. Session will eventually expire.", err)
// Don't return error here, as session closure will handle it.
}
// Close the session to ensure lease is revoked quickly.
if s.session != nil {
err := s.session.Close() // This is synchronous
s.session = nil
s.election = nil
if err != nil {
return fmt.Errorf("error closing session during resign: %w", err)
}
}
log.Printf("Successfully resigned leadership for %s", s.leaderID)
return nil
}
func (s *EtcdStore) GetLeader(ctx context.Context) (string, error) {
// This method needs a temporary session if one doesn't exist,
// or it can try to get the leader key directly if the election pattern stores it.
// concurrency.NewElection().Leader(ctx) is the way.
// It requires a session. If we are campaigning, we have one.
// If we are just an observer, we might need a short-lived session.
s.resignMutex.Lock()
currentSession := s.session
s.resignMutex.Unlock()
var tempSession *concurrency.Session
var err error
if currentSession == nil {
// Create a temporary session to observe leader
// Use a shorter TTL for observer session if desired, or same as campaign TTL
ttl := s.leaseTTL
if ttl == 0 {
ttl = 10 // Default observer TTL
}
tempSession, err = concurrency.NewSession(s.client, concurrency.WithTTL(int(ttl)))
if err != nil {
return "", fmt.Errorf("failed to create temporary session for GetLeader: %w", err)
}
defer tempSession.Close()
currentSession = tempSession
}
election := concurrency.NewElection(currentSession, leaderElectionPrefix)
reqCtx, cancel := context.WithTimeout(ctx, defaultRequestTimeout)
defer cancel()
resp, err := election.Leader(reqCtx)
if err != nil {
if err == concurrency.ErrElectionNoLeader {
return "", nil // No leader currently elected
}
return "", fmt.Errorf("failed to get leader: %w", err)
}
if resp != nil && len(resp.Kvs) > 0 {
return string(resp.Kvs[0].Value), nil
}
return "", nil // No leader
}
func (s *EtcdStore) DoTransaction(ctx context.Context, checks []Compare, onSuccess []Op, onFailure []Op) (bool, error) {
if len(onFailure) > 0 {
// Standard etcd Txn doesn't have an "Else" block that takes arbitrary operations
// like K8s apiserver. It only has If/Then.
// We can simulate simple Else cases if they are just Get ops, but not Puts/Deletes.
// For now, let's state this limitation.
return false, fmt.Errorf("onFailure operations are not fully supported in etcd transaction implementation")
}
etcdCmps := make([]clientv3.Cmp, len(checks))
for i, c := range checks {
if c.ExpectedVersion == 0 { // Key should not exist
etcdCmps[i] = clientv3.Compare(clientv3.ModRevision(c.Key), "=", 0)
} else { // Key should exist with specific version
etcdCmps[i] = clientv3.Compare(clientv3.ModRevision(c.Key), "=", c.ExpectedVersion)
}
}
etcdThenOps := make([]clientv3.Op, len(onSuccess))
for i, o := range onSuccess {
switch o.Type {
case OpPut:
etcdThenOps[i] = clientv3.OpPut(o.Key, string(o.Value))
case OpDelete:
etcdThenOps[i] = clientv3.OpDelete(o.Key)
default:
return false, fmt.Errorf("unsupported operation type in transaction 'onSuccess': %v", o.Type)
}
}
reqCtx, cancel := context.WithTimeout(ctx, defaultRequestTimeout)
defer cancel()
txn := s.client.Txn(reqCtx)
if len(etcdCmps) > 0 {
txn = txn.If(etcdCmps...)
}
txn = txn.Then(etcdThenOps...)
// No Else() for general ops, etcd's Else takes clientv3.Op too, but our Op is different.
resp, err := txn.Commit()
if err != nil {
return false, fmt.Errorf("etcd transaction commit failed: %w", err)
}
return resp.Succeeded, nil
}

89
internal/store/interface.go Normal file
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@@ -0,0 +1,89 @@
package store
import (
"context"
)
// KV represents a key-value pair from the store.
type KV struct {
Key string
Value []byte
Version int64 // etcd ModRevision or similar versioning
}
// EventType defines the type of change observed by a Watch.
type EventType int
const (
// EventTypePut indicates a key was created or updated.
EventTypePut EventType = iota
// EventTypeDelete indicates a key was deleted.
EventTypeDelete
)
// WatchEvent represents a single event from a Watch operation.
type WatchEvent struct {
Type EventType
KV KV
PrevKV *KV // Previous KV, if available and applicable (e.g., for updates)
}
// Compare is used in transactions to check a key's version.
type Compare struct {
Key string
ExpectedVersion int64 // 0 means key should not exist. >0 means key must have this version.
}
// OpType defines the type of operation in a transaction.
type OpType int
const (
// OpPut represents a put operation.
OpPut OpType = iota
// OpDelete represents a delete operation.
OpDelete
// OpGet is not typically used in Txn success/fail ops but included for completeness if needed.
OpGet
)
// Op represents an operation to be performed within a transaction.
type Op struct {
Type OpType
Key string
Value []byte // Used for OpPut
}
// StateStore defines the interface for interacting with the underlying key-value store.
// It's designed based on RFC 5.1.
type StateStore interface {
// Put stores a key-value pair.
Put(ctx context.Context, key string, value []byte) error
// Get retrieves a key-value pair. Returns an error if key not found.
Get(ctx context.Context, key string) (*KV, error)
// Delete removes a key.
Delete(ctx context.Context, key string) error
// List retrieves all key-value pairs matching a prefix.
List(ctx context.Context, prefix string) ([]KV, error)
// Watch observes changes to a key or prefix, starting from a given revision.
// startRevision = 0 means watch from current.
Watch(ctx context.Context, keyOrPrefix string, startRevision int64) (<-chan WatchEvent, error)
// Close releases any resources held by the store client.
Close() error
// Campaign attempts to acquire leadership for the given leaderID.
// It returns a leadershipCtx that is cancelled when leadership is lost or Resign is called.
// leaseTTLSeconds specifies the TTL for the leader's lease.
Campaign(ctx context.Context, leaderID string, leaseTTLSeconds int64) (leadershipCtx context.Context, err error)
// Resign relinquishes leadership if currently held.
// The context passed should ideally be the one associated with the current leadership term or a parent.
Resign(ctx context.Context) error
// GetLeader retrieves the ID of the current leader.
GetLeader(ctx context.Context) (leaderID string, err error)
// DoTransaction executes a list of operations atomically if all checks pass.
// checks are conditions that must be true.
// onSuccess operations are performed if checks pass.
// onFailure operations are performed if checks fail (not typically supported by etcd Txn else).
// Returns true if the transaction was committed (onSuccess ops were applied).
DoTransaction(ctx context.Context, checks []Compare, onSuccess []Op, onFailure []Op) (committed bool, err error)
}