demo3新增自定义负载均衡策略, 通过 key 转到指定 server

go.mod

@@ -8,15 +8,15 @@ require (
 	github.com/coreos/etcd v3.3.25+incompatible
 	github.com/golang/protobuf v1.5.2
 	github.com/inconshreveable/log15 v0.0.0-20201112154412-8562bdadbbac
-	github.com/modern-go/reflect2 v1.0.1 // indirect
 	github.com/pkg/errors v0.9.1
 	github.com/rs/zerolog v1.21.0
+	github.com/spaolacci/murmur3 v1.1.0
+	github.com/stretchr/testify v1.5.1
 	gitlab.33.cn/chat/dtalk v0.0.3
+	gitlab.33.cn/utils/go-kit v1.0.7
 	golang.org/x/crypto v0.0.0-20210513164829-c07d793c2f9a // indirect
 	golang.org/x/net v0.0.0-20210510120150-4163338589ed // indirect
-	google.golang.org/genproto v0.0.0-20200526211855-cb27e3aa2013 // indirect
 	google.golang.org/grpc v1.33.0
-	gopkg.in/yaml.v2 v2.4.0 // indirect
 )
 
 replace google.golang.org/grpc => google.golang.org/grpc v1.26.0

go.sum

@@ -8,6 +8,8 @@ github.com/AndreasBriese/bbloom v0.0.0-20190306092124-e2d15f34fcf9/go.mod h1:bOv
 github.com/BurntSushi/toml v0.0.0-20170626110600-a368813c5e64/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
 github.com/BurntSushi/toml v0.3.1 h1:WXkYYl6Yr3qBf1K79EBnL4mak0OimBfB0XUf9Vl28OQ=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
+github.com/ClickHouse/clickhouse-go v1.4.3/go.mod h1:EaI/sW7Azgz9UATzd5ZdZHRUhHgv5+JMS9NSr2smCJI=
+github.com/DATA-DOG/go-sqlmock v1.4.1/go.mod h1:f/Ixk793poVmq4qj/V1dPUg2JEAKC73Q5eFN3EC/SaM=
 github.com/Kubuxu/go-os-helper v0.0.1/go.mod h1:N8B+I7vPCT80IcP58r50u4+gEEcsZETFUpAzWW2ep1Y=
 github.com/NebulousLabs/Sia v1.3.7/go.mod h1:SCASk6mV8QdEojKyecjj/Jd0OGSXkZonkhow7XXKk6Q=
 github.com/NebulousLabs/entropy-mnemonics v0.0.0-20170316012907-7b01a644a636/go.mod h1:ed2ZsnmJfqVNZOwxWWFZaSHJY3ifOjCS7i5yX9dvKHs=
@@ -24,16 +26,24 @@ github.com/XiaoMi/pegasus-go-client v0.0.0-20181029071519-9400942c5d1c/go.mod h1
 github.com/aead/siphash v1.0.1/go.mod h1:Nywa3cDsYNNK3gaciGTWPwHt0wlpNV15vwmswBAUSII=
 github.com/agl/ed25519 v0.0.0-20170116200512-5312a6153412/go.mod h1:WPjqKcmVOxf0XSf3YxCJs6N6AOSrOx3obionmG7T0y0=
 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/alicebob/gopher-json v0.0.0-20200520072559-a9ecdc9d1d3a/go.mod h1:SGnFV6hVsYE877CKEZ6tDNTjaSXYUk6QqoIK6PrAtcc=
+github.com/alicebob/miniredis/v2 v2.14.1/go.mod h1:uS970Sw5Gs9/iK3yBg0l9Uj9s25wXxSpQUE9EaJ/Blg=
 github.com/aliyun/alibaba-cloud-sdk-go v1.61.948/go.mod h1:pUKYbK5JQ+1Dfxk80P0qxGqe5dkxDoabbZS7zOcouyA=
 github.com/andybalholm/cascadia v1.1.0/go.mod h1:GsXiBklL0woXo1j/WYWtSYYC4ouU9PqHO0sqidkEA4Y=
+github.com/antihax/optional v0.0.0-20180407024304-ca021399b1a6/go.mod h1:V8iCPQYkqmusNa815XgQio277wI47sdRh1dUOLdyC6Q=
+github.com/antlr/antlr4 v0.0.0-20210105212045-464bcbc32de2/go.mod h1:T7PbCXFs94rrTttyxjbyT5+/1V8T2TYDejxUfHJjw1Y=
 github.com/apache/thrift v0.0.0-20171203172758-327ebb6c2b6d/go.mod h1:cp2SuWMxlEZw2r+iP2GNCdIi4C1qmUzdZFSVb+bacwQ=
 github.com/armon/consul-api v0.0.0-20180202201655-eb2c6b5be1b6/go.mod h1:grANhF5doyWs3UAsr3K4I6qtAmlQcZDesFNEHPZAzj8=
 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/bilibili/discovery v1.0.1/go.mod h1:daS5nEYEBt0scrrmuoNCxWXDHFK6gtEpjhVKG6MUxUg=
+github.com/bkaradzic/go-lz4 v1.0.0/go.mod h1:0YdlkowM3VswSROI7qDxhRvJ3sLhlFrRRwjwegp5jy4=
 github.com/boltdb/bolt v1.3.1/go.mod h1:clJnj/oiGkjum5o1McbSZDSLxVThjynRyGBgiAx27Ps=
 github.com/bsm/sarama-cluster v2.1.15+incompatible/go.mod h1:r7ao+4tTNXvWm+VRpRJchr2kQhqxgmAp2iEX5W96gMM=
 github.com/btcsuite/btcd v0.0.0-20190213025234-306aecffea32/go.mod h1:DrZx5ec/dmnfpw9KyYoQyYo7d0KEvTkk/5M/vbZjAr8=
@@ -49,7 +59,15 @@ github.com/btcsuite/snappy-go v0.0.0-20151229074030-0bdef8d06723/go.mod h1:8woku
 github.com/btcsuite/websocket v0.0.0-20150119174127-31079b680792/go.mod h1:ghJtEyQwv5/p4Mg4C0fgbePVuGr935/5ddU9Z3TmDRY=
 github.com/btcsuite/winsvc v1.0.0/go.mod h1:jsenWakMcC0zFBFurPLEAyrnc/teJEM1O46fmI40EZs=
 github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU=
+github.com/cespare/xxhash v1.1.0 h1:a6HrQnmkObjyL+Gs60czilIUGqrzKutQD6XZog3p+ko=
 github.com/cespare/xxhash v1.1.0/go.mod h1:XrSqR1VqqWfGrhpAt58auRo0WTKS1nRRg3ghfAqPWnc=
+github.com/cespare/xxhash/v2 v2.1.1 h1:6MnRN8NT7+YBpUIWxHtefFZOKTAPgGjpQSxqLNn0+qY=
+github.com/cespare/xxhash/v2 v2.1.1/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
+github.com/chzyer/logex v1.1.10/go.mod h1:+Ywpsq7O8HXn0nuIou7OrIPyXbp3wmkHB+jjWRnGsAI=
+github.com/chzyer/readline v0.0.0-20180603132655-2972be24d48e/go.mod h1:nSuG5e5PlCu98SY8svDHJxuZscDgtXS6KTTbou5AhLI=
+github.com/chzyer/test v0.0.0-20180213035817-a1ea475d72b1/go.mod h1:Q3SI9o4m/ZMnBNeIyt5eFwwo7qiLfzFZmjNmxjkiQlU=
+github.com/cloudflare/golz4 v0.0.0-20150217214814-ef862a3cdc58/go.mod h1:EOBUe0h4xcZ5GoxqC5SDxFQ8gwyZPKQoEzownBlhI80=
+github.com/cockroachdb/datadriven v0.0.0-20190809214429-80d97fb3cbaa/go.mod h1:zn76sxSg3SzpJ0PPJaLDCu+Bu0Lg3sKTORVIj19EIF8=
 github.com/coreos/bbolt v1.3.0/go.mod h1:iRUV2dpdMOn7Bo10OQBFzIJO9kkE559Wcmn+qkEiiKk=
 github.com/coreos/bbolt v1.3.2 h1:wZwiHHUieZCquLkDL0B8UhzreNWsPHooDAG3q34zk0s=
 github.com/coreos/bbolt v1.3.2/go.mod h1:iRUV2dpdMOn7Bo10OQBFzIJO9kkE559Wcmn+qkEiiKk=
@@ -64,10 +82,13 @@ github.com/coreos/go-semver v0.3.0/go.mod h1:nnelYz7RCh+5ahJtPPxZlU+153eP4D4r3Ee
 github.com/coreos/go-systemd v0.0.0-20190321100706-95778dfbb74e/go.mod h1:F5haX7vjVVG0kc13fIWeqUViNPyEJxv/OmvnBo0Yme4=
 github.com/coreos/go-systemd v0.0.0-20190719114852-fd7a80b32e1f h1:JOrtw2xFKzlg+cbHpyrpLDmnN1HqhBfnX7WDiW7eG2c=
 github.com/coreos/go-systemd v0.0.0-20190719114852-fd7a80b32e1f/go.mod h1:F5haX7vjVVG0kc13fIWeqUViNPyEJxv/OmvnBo0Yme4=
+github.com/coreos/go-systemd/v22 v22.0.0/go.mod h1:xO0FLkIi5MaZafQlIrOotqXZ90ih+1atmu1JpKERPPk=
 github.com/coreos/pkg v0.0.0-20180928190104-399ea9e2e55f h1:lBNOc5arjvs8E5mO2tbpBpLoyyu8B6e44T7hJy6potg=
 github.com/coreos/pkg v0.0.0-20180928190104-399ea9e2e55f/go.mod h1:E3G3o1h8I7cfcXa63jLwjI0eiQQMgzzUDFVpN/nH/eA=
 github.com/cpuguy83/go-md2man v1.0.10/go.mod h1:SmD6nW6nTyfqj6ABTjUi3V3JVMnlJmwcJI5acqYI6dE=
+github.com/cpuguy83/go-md2man/v2 v2.0.0-20190314233015-f79a8a8ca69d/go.mod h1:maD7wRr/U5Z6m/iR4s+kqSMx2CaBsrgA7czyZG/E6dU=
 github.com/cpuguy83/go-md2man/v2 v2.0.0/go.mod h1:maD7wRr/U5Z6m/iR4s+kqSMx2CaBsrgA7czyZG/E6dU=
+github.com/creack/pty v1.1.7/go.mod h1:lj5s0c3V2DBrqTV7llrYr5NG6My20zk30Fl46Y7DoTY=
 github.com/davecgh/go-spew v0.0.0-20171005155431-ecdeabc65495/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 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=
@@ -82,16 +103,22 @@ github.com/dgrijalva/jwt-go v3.2.0+incompatible/go.mod h1:E3ru+11k8xSBh+hMPgOLZm
 github.com/dgryski/go-farm v0.0.0-20190104051053-3adb47b1fb0f/go.mod h1:SqUrOPUnsFjfmXRMNPybcSiG0BgUW2AuFH8PAnS2iTw=
 github.com/dgryski/go-farm v0.0.0-20190423205320-6a90982ecee2/go.mod h1:SqUrOPUnsFjfmXRMNPybcSiG0BgUW2AuFH8PAnS2iTw=
 github.com/dgryski/go-sip13 v0.0.0-20181026042036-e10d5fee7954/go.mod h1:vAd38F8PWV+bWy6jNmig1y/TA+kYO4g3RSRF0IAv0no=
+github.com/dustin/go-humanize v0.0.0-20171111073723-bb3d318650d4/go.mod h1:HtrtbFcZ19U5GC7JDqmcUSB87Iq5E25KnS6fMYU6eOk=
 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/eapache/go-resiliency v1.1.0/go.mod h1:kFI+JgMyC7bLPUVY133qvEBtVayf5mFgVsvEsIPBvNs=
 github.com/eapache/go-xerial-snappy v0.0.0-20180814174437-776d5712da21/go.mod h1:+020luEh2TKB4/GOp8oxxtq0Daoen/Cii55CzbTV6DU=
 github.com/eapache/queue v1.1.0/go.mod h1:6eCeP0CKFpHLu8blIFXhExK/dRa7WDZfr6jVFPTqq+I=
+github.com/emicklei/proto v1.9.0/go.mod h1:rn1FgRS/FANiZdD2djyH7TMA9jdRDcYQ9IEN9yvjX0A=
 github.com/envoyproxy/go-control-plane v0.9.1-0.20191026205805-5f8ba28d4473/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4=
 github.com/envoyproxy/protoc-gen-validate v0.1.0/go.mod h1:iSmxcyjqTsJpI2R4NaDN7+kN2VEUnK/pcBlmesArF7c=
 github.com/erikstmartin/go-testdb v0.0.0-20160219214506-8d10e4a1bae5/go.mod h1:a2zkGnVExMxdzMo3M0Hi/3sEU+cWnZpSni0O6/Yb/P0=
+github.com/fatih/color v1.7.0/go.mod h1:Zm6kSWBoL9eyXnKyktHP6abPY2pDugNf5KwzbycvMj4=
+github.com/fatih/color v1.9.0/go.mod h1:eQcE1qtQxscV5RaZvpXrrb8Drkc3/DdQ+uUYCNjL+zU=
 github.com/fatih/color v1.10.0/go.mod h1:ELkj/draVOlAH/xkhN6mQ50Qd0MPOk5AAr3maGEBuJM=
+github.com/fatih/structtag v1.2.0/go.mod h1:mBJUNpUnHmRKrKlQQlmCrh5PuhftFbNv8Ys4/aAZl94=
 github.com/fortytw2/leaktest v1.3.0/go.mod h1:jDsjWgpAGjm2CA7WthBh/CdZYEPF31XHquHwclZch5g=
+github.com/frankban/quicktest v1.7.2/go.mod h1:jaStnuzAqU1AJdCO0l53JDCJrVDKcS03DbaAcR7Ks/o=
 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/gin-contrib/pprof v1.3.0/go.mod h1:waMjT1H9b179t3CxuG1cV3DHpga6ybizwfBaM5OXaB0=
@@ -102,8 +129,10 @@ github.com/gin-gonic/gin v1.3.0/go.mod h1:7cKuhb5qV2ggCFctp2fJQ+ErvciLZrIeoOSOm6
 github.com/gin-gonic/gin v1.5.0/go.mod h1:Nd6IXA8m5kNZdNEHMBd93KT+mdY3+bewLgRvmCsR2Do=
 github.com/gin-gonic/gin v1.6.2/go.mod h1:75u5sXoLsGZoRN5Sgbi1eraJ4GU3++wFwWzhwvtwp4M=
 github.com/gin-gonic/gin v1.6.3/go.mod h1:75u5sXoLsGZoRN5Sgbi1eraJ4GU3++wFwWzhwvtwp4M=
+github.com/globalsign/mgo v0.0.0-20181015135952-eeefdecb41b8/go.mod h1:xkRDCp4j0OGD1HRkm4kmhM+pmpv3AKq5SU7GMg4oO/Q=
 github.com/go-check/check v0.0.0-20180628173108-788fd7840127/go.mod h1:9ES+weclKsC9YodN5RgxqK/VD9HM9JsCSh7rNhMZE98=
 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-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-playground/assert/v2 v2.0.1/go.mod h1:VDjEfimB/XKnb+ZQfWdccd7VUvScMdVu0Titje2rxJ4=
@@ -112,9 +141,15 @@ github.com/go-playground/locales v0.13.0/go.mod h1:taPMhCMXrRLJO55olJkUXHZBHCxTM
 github.com/go-playground/universal-translator v0.16.0/go.mod h1:1AnU7NaIRDWWzGEKwgtJRd2xk99HeFyHw3yid4rvQIY=
 github.com/go-playground/universal-translator v0.17.0/go.mod h1:UkSxE5sNxxRwHyU+Scu5vgOQjsIJAF8j9muTVoKLVtA=
 github.com/go-playground/validator/v10 v10.2.0/go.mod h1:uOYAAleCW8F/7oMFd6aG0GOhaH6EGOAJShg8Id5JGkI=
+github.com/go-playground/validator/v10 v10.6.1/go.mod h1:xm76BBt941f7yWdGnI2DVPFFg1UK3YY04qifoXU3lOk=
+github.com/go-redis/redis v6.15.7+incompatible/go.mod h1:NAIEuMOZ/fxfXJIrKDQDz8wamY7mA7PouImQ2Jvg6kA=
+github.com/go-sql-driver/mysql v1.4.0/go.mod h1:zAC/RDZ24gD3HViQzih4MyKcchzm+sOG5ZlKdlhCg5w=
 github.com/go-sql-driver/mysql v1.5.0/go.mod h1:DCzpHaOWr8IXmIStZouvnhqoel9Qv2LBy8hT2VhHyBg=
 github.com/go-stack/stack v1.8.0 h1:5SgMzNM5HxrEjV0ww2lTmX6E2Izsfxas4+YHWRs3Lsk=
 github.com/go-stack/stack v1.8.0/go.mod h1:v0f6uXyyMGvRgIKkXu+yp6POWl0qKG85gN/melR3HDY=
+github.com/go-xorm/builder v0.3.4/go.mod h1:KxkQkNN1DpPKTedxXyTQcmH+rXfvk4LZ9SOOBoZBAxw=
+github.com/go-xorm/sqlfiddle v0.0.0-20180821085327-62ce714f951a/go.mod h1:56xuuqnHyryaerycW3BfssRdxQstACi0Epw/yC5E2xM=
+github.com/godbus/dbus/v5 v5.0.3/go.mod h1:xhWf0FNVPg57R7Z0UbKHbJfkEywrmjJnf7w5xrFpKfA=
 github.com/gogo/protobuf v1.1.1/go.mod h1:r8qH/GZQm5c6nD/R0oafs1akxWv10x8SbQlK7atdtwQ=
 github.com/gogo/protobuf v1.2.1/go.mod h1:hp+jE20tsWTFYpLwKvXlhS1hjn+gTNwPg2I6zVXpSg4=
 github.com/gogo/protobuf v1.3.0/go.mod h1:SlYgWuQ5SjCEi6WLHjHCa1yvBfUnHcTbrrZtXPKa29o=
@@ -125,10 +160,13 @@ github.com/golang-collections/collections v0.0.0-20130729185459-604e922904d3/go.
 github.com/golang-sql/civil v0.0.0-20190719163853-cb61b32ac6fe/go.mod h1:8vg3r2VgvsThLBIFL93Qb5yWzgyZWhEmBwUJWevAkK0=
 github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b h1:VKtxabqXZkF25pY9ekfRL6a582T4P37/31XEstQ5p58=
 github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b/go.mod h1:SBH7ygxi8pfUlaOkMMuAQtPIUF8ecWP5IEl/CR7VP2Q=
+github.com/golang/groupcache v0.0.0-20160516000752-02826c3e7903/go.mod h1:cIg4eruTrX1D+g88fzRXU5OdNfaM+9IcxsU14FzY7Hc=
 github.com/golang/groupcache v0.0.0-20190129154638-5b532d6fd5ef/go.mod h1:cIg4eruTrX1D+g88fzRXU5OdNfaM+9IcxsU14FzY7Hc=
-github.com/golang/groupcache v0.0.0-20190702054246-869f871628b6 h1:ZgQEtGgCBiWRM39fZuwSd1LwSqqSW0hOdXCYYDX0R3I=
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@@ -153,27 +191,34 @@ github.com/google/go-cmp v0.2.0/go.mod h1:oXzfMopK8JAjlY9xF4vHSVASa0yLyX7SntLO5a
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@@ -183,6 +228,7 @@ github.com/hashicorp/hcl v1.0.0/go.mod h1:E5yfLk+7swimpb2L/Alb/PJmXilQ/rhwaUYs4T
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@@ -215,17 +261,20 @@ github.com/jinzhu/gorm v1.9.16/go.mod h1:G3LB3wezTOWM2ITLzPxEXgSkOXAntiLHS7UdBef
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@@ -233,16 +282,22 @@ github.com/kisielk/gotool v1.0.0/go.mod h1:XhKaO+MFFWcvkIS/tQcRk01m1F5IRFswLeQ+o
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@@ -312,18 +367,27 @@ github.com/libp2p/go-ws-transport v0.1.0/go.mod h1:rjw1MG1LU9YDC6gzmwObkPd/Sqwhw
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@@ -374,6 +438,8 @@ github.com/multiformats/go-varint v0.0.1/go.mod h1:3Ls8CIEsrijN6+B7PbrXRPxHRPuXS
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@@ -466,6 +551,8 @@ github.com/ugorji/go v1.1.7/go.mod h1:kZn38zHttfInRq0xu/PH0az30d+z6vm202qpg1oXVM
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@@ -481,7 +568,10 @@ github.com/x-cray/logrus-prefixed-formatter v0.5.2/go.mod h1:2duySbKsL6M18s5GU7V
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@@ -516,10 +616,12 @@ golang.org/x/crypto v0.0.0-20190225124518-7f87c0fbb88b/go.mod h1:6SG95UA2DQfeDnf
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@@ -530,6 +632,14 @@ golang.org/x/crypto v0.0.0-20210513164829-c07d793c2f9a/go.mod h1:P+XmwS30IXTQdn5
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@@ -543,11 +653,16 @@ golang.org/x/net v0.0.0-20190227160552-c95aed5357e7/go.mod h1:mL1N/T3taQHkDXs73r
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 golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 golang.org/x/tools v0.0.0-20181030221726-6c7e314b6563/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
@@ -602,8 +725,17 @@ golang.org/x/tools v0.0.0-20181130052023-1c3d964395ce/go.mod h1:n7NCudcB/nEzxVGm
 golang.org/x/tools v0.0.0-20190226205152-f727befe758c/go.mod h1:9Yl7xja0Znq3iFh3HoIrodX9oNMXvdceNzlUR8zjMvY=
 golang.org/x/tools v0.0.0-20190311212946-11955173bddd/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs=
 golang.org/x/tools v0.0.0-20190328211700-ab21143f2384/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs=
+golang.org/x/tools v0.0.0-20190425150028-36563e24a262/go.mod h1:RgjU9mgBXZiqYHBnxXauZ1Gv1EHHAz9KjViQ78xBX0Q=
 golang.org/x/tools v0.0.0-20190524140312-2c0ae7006135/go.mod h1:RgjU9mgBXZiqYHBnxXauZ1Gv1EHHAz9KjViQ78xBX0Q=
+golang.org/x/tools v0.0.0-20190621195816-6e04913cbbac/go.mod h1:/rFqwRUd4F7ZHNgwSSTFct+R/Kf4OFW1sUzUTQQTgfc=
+golang.org/x/tools v0.0.0-20191029041327-9cc4af7d6b2c/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
+golang.org/x/tools v0.0.0-20191029190741-b9c20aec41a5/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
+golang.org/x/tools v0.0.0-20191125144606-a911d9008d1f/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
+golang.org/x/tools v0.0.0-20191130070609-6e064ea0cf2d/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
+golang.org/x/tools v0.0.0-20200130002326-2f3ba24bd6e7/go.mod h1:TB2adYChydJhpapKDTa4BR/hXlZSLoq2Wpct/0txZ28=
+golang.org/x/tools v0.0.0-20200410132612-ae9902aceb98/go.mod h1:EkVYQZoAsY45+roYkvgYkIh4xh/qjgUK9TdY2XT94GE=
+golang.org/x/tools v0.1.0 h1:po9/4sTYwZU9lPhi1tOrb4hCv3qrhiQ77LZfGa2OjwY=
 golang.org/x/tools v0.1.0/go.mod h1:xkSsbof2nBLbhDlRMhhhyNLN/zl3eTqcnHD5viDpcZ0=
 golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
@@ -616,9 +748,11 @@ google.golang.org/genproto v0.0.0-20180831171423-11092d34479b/go.mod h1:JiN7NxoA
 google.golang.org/genproto v0.0.0-20190307195333-5fe7a883aa19/go.mod h1:VzzqZJRnGkLBvHegQrXjBqPurQTc5/KpmUdxsrq26oE=
 google.golang.org/genproto v0.0.0-20190425155659-357c62f0e4bb/go.mod h1:VzzqZJRnGkLBvHegQrXjBqPurQTc5/KpmUdxsrq26oE=
 google.golang.org/genproto v0.0.0-20190819201941-24fa4b261c55/go.mod h1:DMBHOl98Agz4BDEuKkezgsaosCRResVns1a3J2ZsMNc=
+google.golang.org/genproto v0.0.0-20190927181202-20e1ac93f88c/go.mod h1:IbNlFCBrqXvoKpeg0TB2l7cyZUmoaFKYIwrEpbDKLA8=
 google.golang.org/genproto v0.0.0-20200310143817-43be25429f5a/go.mod h1:55QSHmfGQM9UVYDPBsyGGes0y52j32PQ3BqQfXhyH3c=
-google.golang.org/genproto v0.0.0-20200526211855-cb27e3aa2013 h1:+kGHl1aib/qcwaRi1CbqBZ1rk19r85MNUf8HaBghugY=
 google.golang.org/genproto v0.0.0-20200526211855-cb27e3aa2013/go.mod h1:NbSheEEYHJ7i3ixzK3sjbqSGDJWnxyFXZblF3eUsNvo=
+google.golang.org/genproto v0.0.0-20200729003335-053ba62fc06f h1:ohwtWcCwB/fZUxh/vjazHorYmBnua3NmY3CAjwC7mEA=
+google.golang.org/genproto v0.0.0-20200729003335-053ba62fc06f/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
 google.golang.org/grpc v1.26.0 h1:2dTRdpdFEEhJYQD8EMLB61nnrzSCTbG38PhqdhvOltg=
 google.golang.org/grpc v1.26.0/go.mod h1:qbnxyOmOxrQa7FizSgH+ReBfzJrCY1pSN7KXBS8abTk=
 google.golang.org/grpc/cmd/protoc-gen-go-grpc v1.0.1/go.mod h1:6Kw0yEErY5E/yWrBtf03jp27GLLJujG4z/JK95pnjjw=
@@ -630,6 +764,8 @@ google.golang.org/protobuf v1.21.0/go.mod h1:47Nbq4nVaFHyn7ilMalzfO3qCViNmqZ2kzi
 google.golang.org/protobuf v1.22.0/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
 google.golang.org/protobuf v1.23.0/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
 google.golang.org/protobuf v1.23.1-0.20200526195155-81db48ad09cc/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
+google.golang.org/protobuf v1.24.0/go.mod h1:r/3tXBNzIEhYS9I1OUVjXDlt8tc493IdKGjtUeSXeh4=
+google.golang.org/protobuf v1.25.0/go.mod h1:9JNX74DMeImyA3h4bdi1ymwjUzf21/xIlbajtzgsN7c=
 google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp09yW+WbY/TyQbw=
 google.golang.org/protobuf v1.26.0 h1:bxAC2xTBsZGibn2RTntX0oH50xLsqy1OxA9tTL3p/lk=
 google.golang.org/protobuf v1.26.0/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
@@ -637,12 +773,18 @@ gopkg.in/Shopify/sarama.v1 v1.19.0/go.mod h1:AxnvoaevB2nBjNK17cG61A3LleFcWFwVBHB
 gopkg.in/alecthomas/kingpin.v2 v2.2.6/go.mod h1:FMv+mEhP44yOT+4EoQTLFTRgOQ1FBLkstjWtayDeSgw=
 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 h1:YR8cESwS4TdDjEe65xsg0ogRM/Nc3DYOhEAlW+xobZo=
+gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/cheggaaa/pb.v1 v1.0.25/go.mod h1:V/YB90LKu/1FcN3WVnfiiE5oMCibMjukxqG/qStrOgw=
+gopkg.in/cheggaaa/pb.v1 v1.0.28/go.mod h1:V/YB90LKu/1FcN3WVnfiiE5oMCibMjukxqG/qStrOgw=
+gopkg.in/errgo.v2 v2.1.0/go.mod h1:hNsd1EY+bozCKY1Ytp96fpM3vjJbqLJn88ws8XvfDNI=
 gopkg.in/fsnotify.v1 v1.4.7/go.mod h1:Tz8NjZHkW78fSQdbUxIjBTcgA1z1m8ZHf0WmKUhAMys=
 gopkg.in/go-playground/assert.v1 v1.2.1/go.mod h1:9RXL0bg/zibRAgZUYszZSwO/z8Y/a8bDuhia5mkpMnE=
 gopkg.in/go-playground/validator.v8 v8.18.2/go.mod h1:RX2a/7Ha8BgOhfk7j780h4/u/RRjR0eouCJSH80/M2Y=
 gopkg.in/go-playground/validator.v9 v9.29.1/go.mod h1:+c9/zcJMFNgbLvly1L1V+PpxWdVbfP1avr/N00E2vyQ=
 gopkg.in/go-playground/webhooks.v5 v5.2.0/go.mod h1:LZbya/qLVdbqDR1aKrGuWV6qbia2zCYSR5dpom2SInQ=
 gopkg.in/h2non/gock.v1 v1.0.8/go.mod h1:KHI4Z1sxDW6P4N3DfTWSEza07YpkQP7KJBfglRMEjKY=
+gopkg.in/h2non/gock.v1 v1.0.15/go.mod h1:sX4zAkdYX1TRGJ2JY156cFspQn4yRWn6p9EMdODlynE=
 gopkg.in/ini.v1 v1.42.0/go.mod h1:pNLf8WUiyNEtQjuu5G5vTm06TEv9tsIgeAvK8hOrP4k=
 gopkg.in/natefinch/lumberjack.v2 v2.0.0-20170531160350-a96e63847dc3/go.mod h1:l0ndWWf7gzL7RNwBG7wST/UCcT4T24xpD6X8LsfU/+k=
 gopkg.in/resty.v1 v1.12.0/go.mod h1:mDo4pnntr5jdWRML875a/NmxYqAlA73dVijT2AXvQQo=
@@ -654,10 +796,19 @@ gopkg.in/tomb.v2 v2.0.0-20161208151619-d5d1b5820637/go.mod h1:BHsqpu/nsuzkT5BpiH
 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 v2.4.0 h1:D8xgwECY7CYvx+Y2n4sBz93Jn9JRvxdiyyo8CTfuKaY=
 gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=
 honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/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=
+honnef.co/go/tools v0.0.1-2020.1.4 h1:UoveltGrhghAA7ePc+e+QYDHXrBps2PqFZiHkGR/xK8=
+honnef.co/go/tools v0.0.1-2020.1.4/go.mod h1:X/FiERA/W4tHapMX5mGpAtMSVEeEUOyHaw9vFzvIQ3k=
+rsc.io/quote/v3 v3.1.0/go.mod h1:yEA65RcK8LyAZtP9Kv3t0HmxON59tX3rD+tICJqUlj0=
+rsc.io/sampler v1.3.0/go.mod h1:T1hPZKmBbMNahiBKFy5HrXp6adAjACjK9JXDnKaTXpA=
+sigs.k8s.io/yaml v1.1.0/go.mod h1:UJmg0vDUVViEyp3mgSv9WPwZCDxu4rQW1olrI1uml+o=
 sigs.k8s.io/yaml v1.2.0 h1:kr/MCeFWJWTwyaHoR9c8EjH9OumOmoF9YGiZd7lFm/Q=
 sigs.k8s.io/yaml v1.2.0/go.mod h1:yfXDCHCao9+ENCvLSE62v9VSji2MKu5jeNfTrofGhJc=

lb_demo3/balancer/consistenthash/consistenthash.go

+package consistenthash
+
+import (
+	"github.com/rs/zerolog/log"
+	"google.golang.org/grpc/balancer"
+	"google.golang.org/grpc/balancer/base"
+
+	"example/lb_demo3/ketama"
+)
+
+const (
+	// Name 一致性hash平衡器的注册名称
+	Name = "consistent_hash"
+	// DefaultKey 默认的用于计算一致性hash的key
+	DefaultKey = "X-Consistent-Hash"
+)
+
+func init() {
+	balancer.Register(newBuilder(DefaultKey))
+}
+
+// RegisterBuilder 注册一致性hash构建器
+func RegisterBuilder(chKey string) {
+	balancer.Register(newBuilder(chKey))
+}
+
+// newBuilder 新建一致性hash构建器
+func newBuilder(chKey string) balancer.Builder {
+	if chKey == "" {
+		chKey = DefaultKey
+	}
+
+	return base.NewBalancerBuilderV2(Name,
+		&chPickerBuilder{chKey: chKey},
+		base.Config{HealthCheck: true},
+	)
+}
+
+// chPickerBuilder 一致性hash构建器
+type chPickerBuilder struct {
+	chKey string
+}
+
+// Build 构建一致性hash选取器
+func (b *chPickerBuilder) Build(buildInfo base.PickerBuildInfo) balancer.V2Picker {
+	if len(buildInfo.ReadySCs) == 0 {
+		return base.NewErrPickerV2(balancer.ErrNoSubConnAvailable)
+	}
+
+	// 构建chPicker
+	picker := &chPicker{
+		subConns: make(map[string]balancer.SubConn),
+		ch:       ketama.New(), // 基于Ketama算法的一致性hash负载均衡器
+		chKey:    b.chKey,      // 用于计算一致性hash的key
+	}
+
+	for sc, conInfo := range buildInfo.ReadySCs {
+		node := conInfo.Address.Addr
+		picker.ch.Add(node)
+		picker.subConns[node] = sc
+	}
+
+	return picker
+}
+
+// chPicker 一致性hash选取器
+type chPicker struct {
+	subConns map[string]balancer.SubConn
+	ch       *ketama.Ketama
+	chKey    string
+}
+
+// Pick 获取一致性hash选取结果
+func (p *chPicker) Pick(info balancer.PickInfo) (balancer.PickResult, error) {
+	var ret balancer.PickResult
+
+	key, _ := info.Ctx.Value(p.chKey).(string)
+	if key == "" {
+		key = "randUtil.NewString(20)"
+	}
+
+	node, ok := p.ch.Get(key)
+	if ok {
+		ret.SubConn = p.subConns[node]
+	}
+	log.Debug().Str("key", key).Str("node", node).Msg("consistenthash Pick")
+	return ret, nil
+}

lb_demo3/balancer/consistenthash/consistenthash_test.go

+package consistenthash
+
+import (
+	"context"
+	"strconv"
+	"sync"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"google.golang.org/grpc/balancer"
+	"google.golang.org/grpc/balancer/base"
+	"google.golang.org/grpc/resolver"
+)
+
+func init() {
+	RegisterBuilder(DefaultKey)
+}
+
+func TestChPicker_PickErr(t *testing.T) {
+	builder := &chPickerBuilder{chKey: DefaultKey}
+	picker := builder.Build(base.PickerBuildInfo{})
+	_, err := picker.Pick(balancer.PickInfo{})
+	assert.EqualError(t, err, balancer.ErrNoSubConnAvailable.Error())
+}
+
+func TestChPicker_Pick(t *testing.T) {
+	cases := []struct {
+		name       string
+		candidates int
+	}{
+		{
+			name:       "single",
+			candidates: 1,
+		},
+		{
+			name:       "two",
+			candidates: 2,
+		},
+		{
+			name:       "multiple",
+			candidates: 10,
+		},
+	}
+
+	for _, c := range cases {
+		t.Run(c.name, func(t *testing.T) {
+			const total = 10000
+			builder := &chPickerBuilder{chKey: DefaultKey}
+			buildInfo := base.PickerBuildInfo{ReadySCs: make(map[balancer.SubConn]base.SubConnInfo)}
+			for i := 0; i < c.candidates; i++ {
+				sc := &mockClientConn{address: strconv.Itoa(i)}
+				buildInfo.ReadySCs[sc] = base.SubConnInfo{
+					Address: resolver.Address{Addr: strconv.Itoa(i)},
+				}
+			}
+
+			picker := builder.Build(buildInfo)
+			var wg sync.WaitGroup
+			wg.Add(total)
+			for i := 0; i < total; i++ {
+				go func() {
+					_, _ = picker.Pick(balancer.PickInfo{
+						FullMethodName: "/",
+						Ctx:            context.Background(),
+					})
+					wg.Done()
+				}()
+			}
+
+			wg.Wait()
+			ch := picker.(*chPicker).ch
+			t.Logf("%+v", ch)
+		})
+	}
+}
+
+type mockClientConn struct {
+	address string
+}
+
+func (m *mockClientConn) UpdateAddresses(addresses []resolver.Address) {
+}
+
+func (m *mockClientConn) Connect() {
+}

lb_demo3/balancer/key/key.go

+package key
+
+import (
+	"github.com/rs/zerolog/log"
+	"google.golang.org/grpc/balancer"
+	"google.golang.org/grpc/balancer/base"
+	"google.golang.org/grpc/grpclog"
+	"sync"
+)
+
+const (
+	Name       = "picker_key"
+	DefaultKey = "X-rand-string-balabala"
+)
+
+func init() {
+	balancer.Register(newBuilder(DefaultKey))
+}
+
+func newBuilder(key string) balancer.Builder {
+	return base.NewBalancerBuilderV2(
+		Name,
+		&keyPickerBuilder{key: key},
+		base.Config{HealthCheck: false},
+	)
+}
+
+type keyPickerBuilder struct {
+	key string
+}
+
+func (b *keyPickerBuilder) Build(info base.PickerBuildInfo) balancer.V2Picker {
+	grpclog.Infof("keyPickerBuilder: newPicker called with info: %v", info)
+	if len(info.ReadySCs) == 0 {
+		return base.NewErrPickerV2(balancer.ErrNoSubConnAvailable)
+	}
+
+	picker := &keyPicker{
+		addr2sc: make(map[string]balancer.SubConn),
+		key:     b.key,
+	}
+	log.Debug().Int("len info.ReadySCs", len(info.ReadySCs)).Msg("")
+	for sc, conInfo := range info.ReadySCs {
+		addr := conInfo.Address.Addr
+		picker.setAddr2sc(addr, sc)
+	}
+
+	return picker
+}
+
+type keyPicker struct {
+	addr2sc map[string]balancer.SubConn
+	sync.RWMutex
+	key string
+}
+
+func (p *keyPicker) setAddr2sc(addr string, sc balancer.SubConn) {
+	p.Lock()
+	defer p.Unlock()
+	p.addr2sc[addr] = sc
+	log.Debug().Str("addr", addr).Msg("set addr 2 sc")
+}
+
+func (p *keyPicker) getAddr2sc(addr string) (balancer.SubConn, error) {
+	p.RLock()
+	defer p.RUnlock()
+	sc, ok := p.addr2sc[addr]
+	if ok {
+		return sc, nil
+	}
+	log.Warn().Str("addr", addr).Msg("server warn")
+	// TODO
+	for _, tsc := range p.addr2sc {
+
+		return tsc, nil
+	}
+	return nil, nil
+}
+
+func (p *keyPicker) Pick(info balancer.PickInfo) (balancer.PickResult, error) {
+	var res balancer.PickResult
+
+	addr, _ := info.Ctx.Value(p.key).(string)
+
+	sc, _ := p.getAddr2sc(addr)
+	res.SubConn = sc
+	return res, nil
+}

lb_demo3/common/grpc.go

@@ -2,6 +2,7 @@ package common
 
 import (
 	"context"
+	"example/lb_demo3/balancer/key"
 	"fmt"
 	"time"
 
@@ -38,6 +39,8 @@ func NewGRPCConn(addr string, timeout time.Duration) (*grpc.ClientConn, error) {
 			}),
 			//grpc.WithDefaultServiceConfig(fmt.Sprintf(`{"LoadBalancingPolicy": "%s"}`, roundrobin.Name)),
 			// 自定义负载策略
-			grpc.WithDefaultServiceConfig(fmt.Sprintf(`{"LoadBalancingPolicy": "%s"}`, "weight")),
+			//grpc.WithDefaultServiceConfig(fmt.Sprintf(`{"LoadBalancingPolicy": "%s"}`, "weight")),
+			//grpc.WithDefaultServiceConfig(fmt.Sprintf(`{"LoadBalancingPolicy": "%s"}`, consistenthash.Name)),
+			grpc.WithDefaultServiceConfig(fmt.Sprintf(`{"LoadBalancingPolicy": "%s"}`, key.Name)),
 		}...)
 }

lb_demo3/generator/cmd/main.go

@@ -13,7 +13,7 @@ import (
 	"example/lb_demo3/generator/config"
 	"example/lb_demo3/generator/server/grpc"
 	"example/lb_demo3/generator/service"
-	"example/lb_demo3/naming"
+	naming "example/pkg/naming/key"
 	"github.com/Terry-Mao/goim/pkg/ip"
 	"github.com/inconshreveable/log15"
 )
@@ -37,7 +37,7 @@ func main() {
 	// register server
 	_, port, _ := net.SplitHostPort(config.Conf.GRPCServer.Addr)
 	addr := fmt.Sprintf("%s:%s", ip.InternalIP(), port)
-	if err := naming.Register(config.Conf.Reg.RegAddrs, config.Conf.Reg.SrvName, addr, config.Conf.Reg.Schema, 15, config.Conf.Weight); err != nil {
+	if err := naming.Register(config.Conf.Reg.RegAddrs, config.Conf.Reg.SrvName, addr, config.Conf.Reg.Schema, 15); err != nil {
 		panic(err)
 	}
 	fmt.Println("register ok")

lb_demo3/naming/register.go

@@ -4,7 +4,6 @@ import (
 	"context"
 	"fmt"
 	"log"
-	"strconv"
 	"strings"
 	"time"
 
@@ -51,7 +50,7 @@ func withAlive(name, addr, schema string, ttl, weight int64) error {
 	}
 
 	log.Printf("key:%v, weight=%d\n", "/"+schema+"/"+name+"/"+addr, weight)
-	_, err = cli.Put(context.Background(), "/"+schema+"/"+name+"/"+addr, strconv.FormatInt(weight, 10), clientv3.WithLease(leaseResp.ID))
+	_, err = cli.Put(context.Background(), "/"+schema+"/"+name+"/"+addr, addr, clientv3.WithLease(leaseResp.ID))
 	if err != nil {
 		log.Printf("put etcd error:%s", err)
 		return err

lb_demo3/naming/resolver_v3.go

+package naming
+
+//
+//import (
+//	"context"
+//	"fmt"
+//	"log"
+//	"strconv"
+//	"strings"
+//	"time"
+//
+//	"example/lb_demo3/balancer/weight"
+//	"github.com/coreos/etcd/clientv3"
+//	"github.com/coreos/etcd/mvcc/mvccpb"
+//	"google.golang.org/grpc/resolver"
+//)
+//
+//var schema string
+//var cli *clientv3.Client
+//
+//type etcdResolver struct {
+//	rawAddr string
+//	schema  string
+//	cc      resolver.ClientConn
+//}
+//
+//func NewResolver(etcdAddr, schema string) resolver.Builder {
+//	return &etcdResolver{rawAddr: etcdAddr, schema: schema}
+//}
+//
+//func (r *etcdResolver) Build(target resolver.Target, cc resolver.ClientConn, opts resolver.BuildOptions) (resolver.Resolver, error) {
+//	//fmt.Println("target:", target)
+//	var err error
+//	if cli == nil {
+//		cli, err = clientv3.New(clientv3.Config{
+//			Endpoints:   strings.Split(r.rawAddr, ";"),
+//			DialTimeout: 15 * time.Second,
+//		})
+//		if err != nil {
+//			return nil, err
+//		}
+//	}
+//
+//	r.cc = cc
+//
+//	go r.watch("/" + target.Scheme + "/" + target.Endpoint + "/")
+//
+//	return r, nil
+//}
+//
+//func (r etcdResolver) Scheme() string {
+//	return r.schema
+//}
+//
+//func (r etcdResolver) ResolveNow(rn resolver.ResolveNowOptions) {
+//	//log.Println("ResolveNow")
+//}
+//
+//func (r etcdResolver) Close() {
+//	//log.Println("Close")
+//}
+//
+//func (r *etcdResolver) watch(keyPrefix string) {
+//	var addrList []resolver.Address
+//
+//	getResp, err := cli.Get(context.Background(), keyPrefix, clientv3.WithPrefix())
+//	if err != nil {
+//		log.Println(err)
+//	} else {
+//		for i := range getResp.Kvs {
+//			nodeWeight, err := strconv.Atoi(string(getResp.Kvs[i].Value))
+//			if err != nil {
+//				log.Println(getResp.Kvs[i].Key, getResp.Kvs[i].Value)
+//				continue
+//			}
+//			addr := resolver.Address{Addr: strings.TrimPrefix(string(getResp.Kvs[i].Key), keyPrefix)}
+//			addr = weight.SetAddrInfo(addr, weight.AddrInfo{Weight: nodeWeight})
+//
+//			addrList = append(addrList, addr)
+//		}
+//	}
+//	fmt.Println(addrList)
+//	// 新版本etcd去除了NewAddress方法 以UpdateState代替
+//	r.cc.UpdateState(resolver.State{Addresses: addrList})
+//
+//	rch := cli.Watch(context.Background(), keyPrefix, clientv3.WithPrefix())
+//	for n := range rch {
+//		for _, ev := range n.Events {
+//			nodeWeight, err := strconv.Atoi(string(ev.Kv.Value))
+//			if err != nil {
+//				log.Println(ev.Kv.Key, ev.Kv.Value)
+//				continue
+//			}
+//			addr := strings.TrimPrefix(string(ev.Kv.Key), keyPrefix)
+//			switch ev.Type {
+//			case mvccpb.PUT:
+//				if !exist(addrList, addr) {
+//					address := resolver.Address{Addr: addr}
+//					address = weight.SetAddrInfo(address, weight.AddrInfo{Weight: nodeWeight})
+//					addrList = append(addrList, address)
+//					r.cc.UpdateState(resolver.State{Addresses: addrList})
+//				}
+//			case mvccpb.DELETE:
+//				if s, ok := remove(addrList, addr); ok {
+//					addrList = s
+//					r.cc.UpdateState(resolver.State{Addresses: addrList})
+//				}
+//			}
+//			log.Printf("%s %q : %q\n", ev.Type, ev.Kv.Key, ev.Kv.Value)
+//		}
+//	}
+//}
+//
+//func exist(l []resolver.Address, addr string) bool {
+//	for i := range l {
+//		if l[i].Addr == addr {
+//			return true
+//		}
+//	}
+//	return false
+//}
+//
+//func remove(s []resolver.Address, addr string) ([]resolver.Address, bool) {
+//	for i := range s {
+//		if s[i].Addr == addr {
+//			s[i] = s[len(s)-1]
+//			s[len(s)-1] = resolver.Address{}
+//			s = s[:len(s)-1]
+//			return s, true
+//		}
+//	}
+//	return nil, false
+//}

lb_demo3/taotie/service/service.go

@@ -4,8 +4,8 @@ import (
 	"context"
 	"example/lb_demo3/common"
 	idgen "example/lb_demo3/generator/api"
-	"example/lb_demo3/naming"
 	"example/lb_demo3/taotie/config"
+	naming "example/pkg/naming/key"
 	"fmt"
 	"github.com/pkg/errors"
 	"github.com/rs/zerolog"

lb_demo3/taotie/service/service_test.go

@@ -2,11 +2,13 @@ package service
 
 import (
 	"context"
-	"example/lb_demo3/taotie/config"
 	"flag"
 	"os"
 	"testing"
 	"time"
+
+	"example/lb_demo3/balancer/key"
+	"example/lb_demo3/taotie/config"
 )
 
 func TestMain(m *testing.M) {
@@ -20,9 +22,12 @@ func TestMain(m *testing.M) {
 func Benchmark_GetID(b *testing.B) {
 	srv := New(config.Conf)
 	b.ResetTimer()
-	b.N = 100
+	b.N = 10
+	time.Sleep(5 * time.Second)
+	addrList := []string{"192.168.22.238:30002", "192.168.22.238:30003", "192.168.22.238:30004"}
 	for i := 0; i < b.N; i++ {
-		id, err := srv.GetLogId(context.Background(), int64(i))
+		ctx := context.Background()
+		id, err := srv.GetLogId(context.WithValue(ctx, key.DefaultKey, addrList[i%len(addrList)]), int64(i))
 		if err != nil {
 			srv.log.Error().Err(err).Msg("")
 		}

pkg/naming/key/register.go

+package naming
+
+import (
+	"context"
+	"fmt"
+	"log"
+	"strings"
+	"time"
+
+	"github.com/coreos/etcd/clientv3"
+)
+
+func Register(etcdAddr, name, addr, schema string, ttl int64) error {
+	var err error
+	if cli == nil {
+		cli, err = clientv3.New(clientv3.Config{
+			Endpoints:   strings.Split(etcdAddr, ";"),
+			DialTimeout: 5 * time.Second,
+		})
+		if err != nil {
+			log.Printf("connect to etcd err:%s", err)
+			return err
+		}
+	}
+
+	ticker := time.NewTicker(time.Second * time.Duration(ttl))
+
+	go func() {
+		for {
+			getResp, err := cli.Get(context.Background(), "/"+schema+"/"+name+"/"+addr)
+			if err != nil {
+				fmt.Println("etcd get err:", err)
+			} else if getResp.Count == 0 {
+				err = withAlive(name, addr, schema, ttl)
+				if err != nil {
+					log.Printf("keep alive:%s", err)
+				}
+			}
+			<-ticker.C
+		}
+	}()
+
+	return nil
+}
+
+func withAlive(name, addr, schema string, ttl int64) error {
+	leaseResp, err := cli.Grant(context.Background(), ttl)
+	if err != nil {
+		return err
+	}
+
+	log.Printf("key:%v\n", "/"+schema+"/"+name+"/"+addr)
+	_, err = cli.Put(context.Background(), "/"+schema+"/"+name+"/"+addr, addr, clientv3.WithLease(leaseResp.ID))
+	if err != nil {
+		log.Printf("put etcd error:%s", err)
+		return err
+	}
+
+	ch, err := cli.KeepAlive(context.Background(), leaseResp.ID)
+	if err != nil {
+		log.Printf("keep alive error:%s", err)
+		return err
+	}
+
+	go func() {
+		<-ch
+		//for leaseKeepResp := range ch {
+		//	log.Println("续约成功", leaseKeepResp.ID)
+		//}
+		//
+		//log.Println("关闭续租")
+	}()
+
+	return nil
+}
+
+func UnRegister(name, addr, schema string) error {
+	if cli != nil {
+		//fmt.Println("unregister...")
+		_, err := cli.Delete(context.Background(), "/"+schema+"/"+name+"/"+addr)
+		return err
+	}
+
+	return nil
+}

lb_demo3/naming/resolver.go → pkg/naming/key/resolver.go

@@ -4,11 +4,9 @@ import (
 	"context"
 	"fmt"
 	"log"
-	"strconv"
 	"strings"
 	"time"
 
-	"example/lb_demo3/balancer/weight"
 	"github.com/coreos/etcd/clientv3"
 	"github.com/coreos/etcd/mvcc/mvccpb"
 	"google.golang.org/grpc/resolver"
@@ -67,15 +65,7 @@ func (r *etcdResolver) watch(keyPrefix string) {
 		log.Println(err)
 	} else {
 		for i := range getResp.Kvs {
-			nodeWeight, err := strconv.Atoi(string(getResp.Kvs[i].Value))
-			if err != nil {
-				log.Println(getResp.Kvs[i].Key, getResp.Kvs[i].Value)
-				continue
-			}
-			addr := resolver.Address{Addr: strings.TrimPrefix(string(getResp.Kvs[i].Key), keyPrefix)}
-			addr = weight.SetAddrInfo(addr, weight.AddrInfo{Weight: nodeWeight})
-
-			addrList = append(addrList, addr)
+			addrList = append(addrList, resolver.Address{Addr: strings.TrimPrefix(string(getResp.Kvs[i].Key), keyPrefix)})
 		}
 	}
 	fmt.Println(addrList)
@@ -85,18 +75,11 @@ func (r *etcdResolver) watch(keyPrefix string) {
 	rch := cli.Watch(context.Background(), keyPrefix, clientv3.WithPrefix())
 	for n := range rch {
 		for _, ev := range n.Events {
-			nodeWeight, err := strconv.Atoi(string(ev.Kv.Value))
-			if err != nil {
-				log.Println(ev.Kv.Key, ev.Kv.Value)
-				continue
-			}
 			addr := strings.TrimPrefix(string(ev.Kv.Key), keyPrefix)
 			switch ev.Type {
 			case mvccpb.PUT:
 				if !exist(addrList, addr) {
-					address := resolver.Address{Addr: addr}
-					address = weight.SetAddrInfo(address, weight.AddrInfo{Weight: nodeWeight})
-					addrList = append(addrList, address)
+					addrList = append(addrList, resolver.Address{Addr: addr})
 					r.cc.UpdateState(resolver.State{Addresses: addrList})
 				}
 			case mvccpb.DELETE:

pkg/naming/normal/register.go

+package naming
+
+import (
+	"context"
+	"fmt"
+	"log"
+	"strings"
+	"time"
+
+	"github.com/coreos/etcd/clientv3"
+)
+
+func Register(etcdAddr, name, addr, schema string, ttl int64) error {
+	var err error
+	if cli == nil {
+		cli, err = clientv3.New(clientv3.Config{
+			Endpoints:   strings.Split(etcdAddr, ";"),
+			DialTimeout: 5 * time.Second,
+		})
+		if err != nil {
+			log.Printf("connect to etcd err:%s", err)
+			return err
+		}
+	}
+
+	ticker := time.NewTicker(time.Second * time.Duration(ttl))
+
+	go func() {
+		for {
+			getResp, err := cli.Get(context.Background(), "/"+schema+"/"+name+"/"+addr)
+			if err != nil {
+				fmt.Println("etcd get err:", err)
+			} else if getResp.Count == 0 {
+				err = withAlive(name, addr, schema, ttl)
+				if err != nil {
+					log.Printf("keep alive:%s", err)
+				}
+			}
+			<-ticker.C
+		}
+	}()
+
+	return nil
+}
+
+func withAlive(name, addr, schema string, ttl int64) error {
+	leaseResp, err := cli.Grant(context.Background(), ttl)
+	if err != nil {
+		return err
+	}
+
+	log.Printf("key:%v\n", "/"+schema+"/"+name+"/"+addr)
+	_, err = cli.Put(context.Background(), "/"+schema+"/"+name+"/"+addr, addr, clientv3.WithLease(leaseResp.ID))
+	if err != nil {
+		log.Printf("put etcd error:%s", err)
+		return err
+	}
+
+	ch, err := cli.KeepAlive(context.Background(), leaseResp.ID)
+	if err != nil {
+		log.Printf("keep alive error:%s", err)
+		return err
+	}
+
+	go func() {
+		<-ch
+		//for leaseKeepResp := range ch {
+		//	log.Println("续约成功", leaseKeepResp.ID)
+		//}
+		//
+		//log.Println("关闭续租")
+	}()
+
+	return nil
+}
+
+func UnRegister(name, addr, schema string) error {
+	if cli != nil {
+		//fmt.Println("unregister...")
+		_, err := cli.Delete(context.Background(), "/"+schema+"/"+name+"/"+addr)
+		return err
+	}
+
+	return nil
+}

pkg/naming/normal/resolver.go

+package naming
+
+import (
+	"context"
+	"fmt"
+	"log"
+	"strings"
+	"time"
+
+	"github.com/coreos/etcd/clientv3"
+	"github.com/coreos/etcd/mvcc/mvccpb"
+	"google.golang.org/grpc/resolver"
+)
+
+var schema string
+var cli *clientv3.Client
+
+type etcdResolver struct {
+	rawAddr string
+	schema  string
+	cc      resolver.ClientConn
+}
+
+func NewResolver(etcdAddr, schema string) resolver.Builder {
+	return &etcdResolver{rawAddr: etcdAddr, schema: schema}
+}
+
+func (r *etcdResolver) Build(target resolver.Target, cc resolver.ClientConn, opts resolver.BuildOptions) (resolver.Resolver, error) {
+	//fmt.Println("target:", target)
+	var err error
+	if cli == nil {
+		cli, err = clientv3.New(clientv3.Config{
+			Endpoints:   strings.Split(r.rawAddr, ";"),
+			DialTimeout: 15 * time.Second,
+		})
+		if err != nil {
+			return nil, err
+		}
+	}
+
+	r.cc = cc
+
+	go r.watch("/" + target.Scheme + "/" + target.Endpoint + "/")
+
+	return r, nil
+}
+
+func (r etcdResolver) Scheme() string {
+	return r.schema
+}
+
+func (r etcdResolver) ResolveNow(rn resolver.ResolveNowOptions) {
+	//log.Println("ResolveNow")
+}
+
+func (r etcdResolver) Close() {
+	//log.Println("Close")
+}
+
+func (r *etcdResolver) watch(keyPrefix string) {
+	var addrList []resolver.Address
+
+	getResp, err := cli.Get(context.Background(), keyPrefix, clientv3.WithPrefix())
+	if err != nil {
+		log.Println(err)
+	} else {
+		for i := range getResp.Kvs {
+			addrList = append(addrList, resolver.Address{Addr: strings.TrimPrefix(string(getResp.Kvs[i].Key), keyPrefix)})
+		}
+	}
+	fmt.Println(addrList)
+	// 新版本etcd去除了NewAddress方法 以UpdateState代替
+	r.cc.UpdateState(resolver.State{Addresses: addrList})
+
+	rch := cli.Watch(context.Background(), keyPrefix, clientv3.WithPrefix())
+	for n := range rch {
+		for _, ev := range n.Events {
+			addr := strings.TrimPrefix(string(ev.Kv.Key), keyPrefix)
+			switch ev.Type {
+			case mvccpb.PUT:
+				if !exist(addrList, addr) {
+					addrList = append(addrList, resolver.Address{Addr: addr})
+					r.cc.UpdateState(resolver.State{Addresses: addrList})
+				}
+			case mvccpb.DELETE:
+				if s, ok := remove(addrList, addr); ok {
+					addrList = s
+					r.cc.UpdateState(resolver.State{Addresses: addrList})
+				}
+			}
+			log.Printf("%s %q : %q\n", ev.Type, ev.Kv.Key, ev.Kv.Value)
+		}
+	}
+}
+
+func exist(l []resolver.Address, addr string) bool {
+	for i := range l {
+		if l[i].Addr == addr {
+			return true
+		}
+	}
+	return false
+}
+
+func remove(s []resolver.Address, addr string) ([]resolver.Address, bool) {
+	for i := range s {
+		if s[i].Addr == addr {
+			s[i] = s[len(s)-1]
+			s[len(s)-1] = resolver.Address{}
+			s = s[:len(s)-1]
+			return s, true
+		}
+	}
+	return nil, false
+}

pkg/naming/register.go

+package naming
+
+import (
+	"context"
+	"fmt"
+	"log"
+	"strings"
+	"time"
+
+	"github.com/coreos/etcd/clientv3"
+)
+
+func Register(etcdAddr, name, addr, schema string, ttl, weight int64) error {
+	var err error
+	if cli == nil {
+		cli, err = clientv3.New(clientv3.Config{
+			Endpoints:   strings.Split(etcdAddr, ";"),
+			DialTimeout: 5 * time.Second,
+		})
+		if err != nil {
+			log.Printf("connect to etcd err:%s", err)
+			return err
+		}
+	}
+
+	ticker := time.NewTicker(time.Second * time.Duration(ttl))
+
+	go func() {
+		for {
+			getResp, err := cli.Get(context.Background(), "/"+schema+"/"+name+"/"+addr)
+			if err != nil {
+				fmt.Println("etcd get err:", err)
+			} else if getResp.Count == 0 {
+				err = withAlive(name, addr, schema, ttl, weight)
+				if err != nil {
+					log.Printf("keep alive:%s", err)
+				}
+			}
+			<-ticker.C
+		}
+	}()
+
+	return nil
+}
+
+func withAlive(name, addr, schema string, ttl, weight int64) error {
+	leaseResp, err := cli.Grant(context.Background(), ttl)
+	if err != nil {
+		return err
+	}
+
+	log.Printf("key:%v, weight=%d\n", "/"+schema+"/"+name+"/"+addr, weight)
+	_, err = cli.Put(context.Background(), "/"+schema+"/"+name+"/"+addr, addr, clientv3.WithLease(leaseResp.ID))
+	if err != nil {
+		log.Printf("put etcd error:%s", err)
+		return err
+	}
+
+	ch, err := cli.KeepAlive(context.Background(), leaseResp.ID)
+	if err != nil {
+		log.Printf("keep alive error:%s", err)
+		return err
+	}
+
+	go func() {
+		<-ch
+		//for leaseKeepResp := range ch {
+		//	log.Println("续约成功", leaseKeepResp.ID)
+		//}
+		//
+		//log.Println("关闭续租")
+	}()
+
+	return nil
+}
+
+func UnRegister(name, addr, schema string) error {
+	if cli != nil {
+		//fmt.Println("unregister...")
+		_, err := cli.Delete(context.Background(), "/"+schema+"/"+name+"/"+addr)
+		return err
+	}
+
+	return nil
+}

pkg/naming/resolver_v1.go

+package naming
+
+import (
+	"context"
+	"fmt"
+	"log"
+	"strings"
+	"time"
+
+	"github.com/coreos/etcd/clientv3"
+	"github.com/coreos/etcd/mvcc/mvccpb"
+	"google.golang.org/grpc/resolver"
+)
+
+var schema string
+var cli *clientv3.Client
+
+type etcdResolver struct {
+	rawAddr string
+	schema  string
+	cc      resolver.ClientConn
+}
+
+func NewResolver(etcdAddr, schema string) resolver.Builder {
+	return &etcdResolver{rawAddr: etcdAddr, schema: schema}
+}
+
+func (r *etcdResolver) Build(target resolver.Target, cc resolver.ClientConn, opts resolver.BuildOptions) (resolver.Resolver, error) {
+	//fmt.Println("target:", target)
+	var err error
+	if cli == nil {
+		cli, err = clientv3.New(clientv3.Config{
+			Endpoints:   strings.Split(r.rawAddr, ";"),
+			DialTimeout: 15 * time.Second,
+		})
+		if err != nil {
+			return nil, err
+		}
+	}
+
+	r.cc = cc
+
+	go r.watch("/" + target.Scheme + "/" + target.Endpoint + "/")
+
+	return r, nil
+}
+
+func (r etcdResolver) Scheme() string {
+	return r.schema
+}
+
+func (r etcdResolver) ResolveNow(rn resolver.ResolveNowOptions) {
+	//log.Println("ResolveNow")
+}
+
+func (r etcdResolver) Close() {
+	//log.Println("Close")
+}
+
+func (r *etcdResolver) watch(keyPrefix string) {
+	var addrList []resolver.Address
+
+	getResp, err := cli.Get(context.Background(), keyPrefix, clientv3.WithPrefix())
+	if err != nil {
+		log.Println(err)
+	} else {
+		for i := range getResp.Kvs {
+			addrList = append(addrList, resolver.Address{Addr: strings.TrimPrefix(string(getResp.Kvs[i].Key), keyPrefix)})
+		}
+	}
+	fmt.Println(addrList)
+	// 新版本etcd去除了NewAddress方法 以UpdateState代替
+	r.cc.UpdateState(resolver.State{Addresses: addrList})
+
+	rch := cli.Watch(context.Background(), keyPrefix, clientv3.WithPrefix())
+	for n := range rch {
+		for _, ev := range n.Events {
+			addr := strings.TrimPrefix(string(ev.Kv.Key), keyPrefix)
+			switch ev.Type {
+			case mvccpb.PUT:
+				if !exist(addrList, addr) {
+					addrList = append(addrList, resolver.Address{Addr: addr})
+					r.cc.UpdateState(resolver.State{Addresses: addrList})
+				}
+			case mvccpb.DELETE:
+				if s, ok := remove(addrList, addr); ok {
+					addrList = s
+					r.cc.UpdateState(resolver.State{Addresses: addrList})
+				}
+			}
+			log.Printf("%s %q : %q\n", ev.Type, ev.Kv.Key, ev.Kv.Value)
+		}
+	}
+}
+
+func exist(l []resolver.Address, addr string) bool {
+	for i := range l {
+		if l[i].Addr == addr {
+			return true
+		}
+	}
+	return false
+}
+
+func remove(s []resolver.Address, addr string) ([]resolver.Address, bool) {
+	for i := range s {
+		if s[i].Addr == addr {
+			s[i] = s[len(s)-1]
+			s[len(s)-1] = resolver.Address{}
+			s = s[:len(s)-1]
+			return s, true
+		}
+	}
+	return nil, false
+}

pkg/naming/resolver_v3.go

+package naming
+
+//
+//import (
+//	"context"
+//	"fmt"
+//	"log"
+//	"strconv"
+//	"strings"
+//	"time"
+//
+//	"example/lb_demo3/balancer/weight"
+//	"github.com/coreos/etcd/clientv3"
+//	"github.com/coreos/etcd/mvcc/mvccpb"
+//	"google.golang.org/grpc/resolver"
+//)
+//
+//var schema string
+//var cli *clientv3.Client
+//
+//type etcdResolver struct {
+//	rawAddr string
+//	schema  string
+//	cc      resolver.ClientConn
+//}
+//
+//func NewResolver(etcdAddr, schema string) resolver.Builder {
+//	return &etcdResolver{rawAddr: etcdAddr, schema: schema}
+//}
+//
+//func (r *etcdResolver) Build(target resolver.Target, cc resolver.ClientConn, opts resolver.BuildOptions) (resolver.Resolver, error) {
+//	//fmt.Println("target:", target)
+//	var err error
+//	if cli == nil {
+//		cli, err = clientv3.New(clientv3.Config{
+//			Endpoints:   strings.Split(r.rawAddr, ";"),
+//			DialTimeout: 15 * time.Second,
+//		})
+//		if err != nil {
+//			return nil, err
+//		}
+//	}
+//
+//	r.cc = cc
+//
+//	go r.watch("/" + target.Scheme + "/" + target.Endpoint + "/")
+//
+//	return r, nil
+//}
+//
+//func (r etcdResolver) Scheme() string {
+//	return r.schema
+//}
+//
+//func (r etcdResolver) ResolveNow(rn resolver.ResolveNowOptions) {
+//	//log.Println("ResolveNow")
+//}
+//
+//func (r etcdResolver) Close() {
+//	//log.Println("Close")
+//}
+//
+//func (r *etcdResolver) watch(keyPrefix string) {
+//	var addrList []resolver.Address
+//
+//	getResp, err := cli.Get(context.Background(), keyPrefix, clientv3.WithPrefix())
+//	if err != nil {
+//		log.Println(err)
+//	} else {
+//		for i := range getResp.Kvs {
+//			nodeWeight, err := strconv.Atoi(string(getResp.Kvs[i].Value))
+//			if err != nil {
+//				log.Println(getResp.Kvs[i].Key, getResp.Kvs[i].Value)
+//				continue
+//			}
+//			addr := resolver.Address{Addr: strings.TrimPrefix(string(getResp.Kvs[i].Key), keyPrefix)}
+//			addr = weight.SetAddrInfo(addr, weight.AddrInfo{Weight: nodeWeight})
+//
+//			addrList = append(addrList, addr)
+//		}
+//	}
+//	fmt.Println(addrList)
+//	// 新版本etcd去除了NewAddress方法 以UpdateState代替
+//	r.cc.UpdateState(resolver.State{Addresses: addrList})
+//
+//	rch := cli.Watch(context.Background(), keyPrefix, clientv3.WithPrefix())
+//	for n := range rch {
+//		for _, ev := range n.Events {
+//			nodeWeight, err := strconv.Atoi(string(ev.Kv.Value))
+//			if err != nil {
+//				log.Println(ev.Kv.Key, ev.Kv.Value)
+//				continue
+//			}
+//			addr := strings.TrimPrefix(string(ev.Kv.Key), keyPrefix)
+//			switch ev.Type {
+//			case mvccpb.PUT:
+//				if !exist(addrList, addr) {
+//					address := resolver.Address{Addr: addr}
+//					address = weight.SetAddrInfo(address, weight.AddrInfo{Weight: nodeWeight})
+//					addrList = append(addrList, address)
+//					r.cc.UpdateState(resolver.State{Addresses: addrList})
+//				}
+//			case mvccpb.DELETE:
+//				if s, ok := remove(addrList, addr); ok {
+//					addrList = s
+//					r.cc.UpdateState(resolver.State{Addresses: addrList})
+//				}
+//			}
+//			log.Printf("%s %q : %q\n", ev.Type, ev.Kv.Key, ev.Kv.Value)
+//		}
+//	}
+//}
+//
+//func exist(l []resolver.Address, addr string) bool {
+//	for i := range l {
+//		if l[i].Addr == addr {
+//			return true
+//		}
+//	}
+//	return false
+//}
+//
+//func remove(s []resolver.Address, addr string) ([]resolver.Address, bool) {
+//	for i := range s {
+//		if s[i].Addr == addr {
+//			s[i] = s[len(s)-1]
+//			s[len(s)-1] = resolver.Address{}
+//			s = s[:len(s)-1]
+//			return s, true
+//		}
+//	}
+//	return nil, false
+//}

pkg/util/type.go

+package util
+
+import (
+	"encoding/json"
+	"fmt"
+	"log"
+	"strconv"
+)
+
+func ToString(val interface{}) string {
+	if val == nil {
+		return ""
+	}
+	switch val.(type) {
+	case float64:
+		return strconv.FormatFloat(val.(float64), 'f', -1, 64)
+	case float32:
+		return strconv.FormatFloat(val.(float64), 'f', -1, 64)
+	case int64:
+		return strconv.FormatInt(val.(int64), 10)
+	}
+	return fmt.Sprintf("%v", val)
+}
+
+func ToInt(val interface{}) int {
+	return int(ToInt32(val))
+}
+
+func ToUInt32(val interface{}) uint32 {
+	return uint32(ToInt32(val))
+}
+
+func ToInt32(o interface{}) int32 {
+	if o == nil {
+		log.Fatal("nil value")
+		return 0
+	}
+	switch t := o.(type) {
+	case int:
+		return int32(t)
+	case int32:
+		return t
+	case int64:
+		return int32(t)
+	case float64:
+		return int32(t)
+	case string:
+		if o == "" {
+			log.Fatal("empty string")
+			return 0
+		}
+		temp, err := strconv.ParseInt(o.(string), 10, 32)
+		if err != nil {
+			log.Fatal("string parse int err", err)
+			return 0
+		}
+		return int32(temp)
+	default:
+		log.Fatal("unknown type", fmt.Sprintf("%T", o))
+		return 0
+	}
+}
+
+func ToInt64(val interface{}) int64 {
+	if val == nil {
+		log.Fatal("nil value")
+		return 0
+	}
+	switch val.(type) {
+	case int:
+		return int64(val.(int))
+	case string:
+		if val.(string) == "" {
+			log.Fatal("empty string")
+			return 0
+		}
+		ret, err := strconv.ParseInt(val.(string), 10, 64)
+		if err != nil {
+			log.Fatal("string parse int err", err)
+			return 0
+		}
+		return ret
+	case float64:
+		return int64(val.(float64))
+	case int64:
+		return val.(int64)
+	case json.Number:
+		v := val.(json.Number)
+		ret, err := v.Int64()
+		if err != nil {
+			log.Fatal("unknown json number")
+			return 0
+		}
+		return ret
+	default:
+		log.Fatal("unknown type", fmt.Sprintf("%T", val))
+		return 0
+	}
+}
+
+func ToFloat64(val interface{}) float64 {
+	if val == nil {
+		log.Fatal("nil value")
+		return 0
+	}
+	switch val.(type) {
+	case string:
+		ret, err := strconv.ParseFloat(val.(string), 64)
+		if err != nil {
+			log.Fatal("string parse float err", err)
+		}
+		return ret
+	default:
+		if v, ok := val.(float64); ok {
+			return v
+		}
+		log.Fatal("unknown type", fmt.Sprintf("%T", val))
+		return 0
+	}
+}
+
+func TypeToString(val interface{}) string {
+	if val == nil {
+		log.Fatal("nil value")
+		return ""
+	}
+	switch val.(type) {
+	case float64:
+		return strconv.FormatFloat(val.(float64), 'f', -1, 64)
+	case float32:
+		return strconv.FormatFloat(val.(float64), 'f', -1, 64)
+	case int64:
+		return strconv.FormatInt(val.(int64), 10)
+	}
+	return fmt.Sprintf("%v", val)
+}