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Balancer placement policies

This commit is contained in:
Marcin Wielgus 2023-02-02 11:54:54 +01:00
parent 9158196a3c
commit f0eb1aa090
10 changed files with 1524 additions and 0 deletions
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balancer/go.mod Normal file
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module k8s.io/autoscaling/balancer
go 1.19
require (
github.com/stretchr/testify v1.8.0
k8s.io/api v0.25.2
k8s.io/apimachinery v0.25.2
k8s.io/client-go v0.25.2
k8s.io/klog/v2 v2.70.1
)
require (
github.com/PuerkitoBio/purell v1.1.1 // indirect
github.com/PuerkitoBio/urlesc v0.0.0-20170810143723-de5bf2ad4578 // indirect
github.com/davecgh/go-spew v1.1.1 // indirect
github.com/emicklei/go-restful/v3 v3.8.0 // indirect
github.com/evanphx/json-patch v4.12.0+incompatible // indirect
github.com/go-logr/logr v1.2.3 // indirect
github.com/go-openapi/jsonpointer v0.19.5 // indirect
github.com/go-openapi/jsonreference v0.19.5 // indirect
github.com/go-openapi/swag v0.19.14 // indirect
github.com/gogo/protobuf v1.3.2 // indirect
github.com/golang/groupcache v0.0.0-20210331224755-41bb18bfe9da // indirect
github.com/golang/protobuf v1.5.2 // indirect
github.com/google/gnostic v0.5.7-v3refs // indirect
github.com/google/go-cmp v0.5.8 // indirect
github.com/google/gofuzz v1.2.0 // indirect
github.com/imdario/mergo v0.3.6 // indirect
github.com/josharian/intern v1.0.0 // indirect
github.com/json-iterator/go v1.1.12 // indirect
github.com/mailru/easyjson v0.7.6 // indirect
github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
github.com/modern-go/reflect2 v1.0.2 // indirect
github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 // indirect
github.com/pkg/errors v0.9.1 // indirect
github.com/pmezard/go-difflib v1.0.0 // indirect
github.com/spf13/pflag v1.0.5 // indirect
golang.org/x/net v0.0.0-20220722155237-a158d28d115b // indirect
golang.org/x/oauth2 v0.0.0-20211104180415-d3ed0bb246c8 // indirect
golang.org/x/sys v0.0.0-20220722155257-8c9f86f7a55f // indirect
golang.org/x/term v0.0.0-20210927222741-03fcf44c2211 // indirect
golang.org/x/text v0.3.7 // indirect
golang.org/x/time v0.0.0-20220210224613-90d013bbcef8 // indirect
google.golang.org/appengine v1.6.7 // indirect
google.golang.org/protobuf v1.28.0 // indirect
gopkg.in/inf.v0 v0.9.1 // indirect
gopkg.in/yaml.v2 v2.4.0 // indirect
gopkg.in/yaml.v3 v3.0.1 // indirect
k8s.io/kube-openapi v0.0.0-20220803162953-67bda5d908f1 // indirect
k8s.io/utils v0.0.0-20220823124924-e9cbc92d1a73 // indirect
sigs.k8s.io/json v0.0.0-20220713155537-f223a00ba0e2 // indirect
sigs.k8s.io/structured-merge-diff/v4 v4.2.3 // indirect
sigs.k8s.io/yaml v1.3.0 // indirect
)

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balancer/go.sum Normal file
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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 v0.50.0/go.mod h1:r9sluTvynVuxRIOHXQEHMFffphuXHOMZMycpNR5e6To=
cloud.google.com/go v0.52.0/go.mod h1:pXajvRH/6o3+F9jDHZWQ5PbGhn+o8w9qiu/CffaVdO4=
cloud.google.com/go v0.53.0/go.mod h1:fp/UouUEsRkN6ryDKNW/Upv/JBKnv6WDthjR6+vze6M=
cloud.google.com/go v0.54.0/go.mod h1:1rq2OEkV3YMf6n/9ZvGWI3GWw0VoqH/1x2nd8Is/bPc=
cloud.google.com/go v0.56.0/go.mod h1:jr7tqZxxKOVYizybht9+26Z/gUq7tiRzu+ACVAMbKVk=
cloud.google.com/go v0.57.0/go.mod h1:oXiQ6Rzq3RAkkY7N6t3TcE6jE+CIBBbA36lwQ1JyzZs=
cloud.google.com/go v0.62.0/go.mod h1:jmCYTdRCQuc1PHIIJ/maLInMho30T/Y0M4hTdTShOYc=
cloud.google.com/go v0.65.0/go.mod h1:O5N8zS7uWy9vkA9vayVHs65eM1ubvY4h553ofrNHObY=
cloud.google.com/go/bigquery v1.0.1/go.mod h1:i/xbL2UlR5RvWAURpBYZTtm/cXjCha9lbfbpx4poX+o=
cloud.google.com/go/bigquery v1.3.0/go.mod h1:PjpwJnslEMmckchkHFfq+HTD2DmtT67aNFKH1/VBDHE=
cloud.google.com/go/bigquery v1.4.0/go.mod h1:S8dzgnTigyfTmLBfrtrhyYhwRxG72rYxvftPBK2Dvzc=
cloud.google.com/go/bigquery v1.5.0/go.mod h1:snEHRnqQbz117VIFhE8bmtwIDY80NLUZUMb4Nv6dBIg=
cloud.google.com/go/bigquery v1.7.0/go.mod h1://okPTzCYNXSlb24MZs83e2Do+h+VXtc4gLoIoXIAPc=
cloud.google.com/go/bigquery v1.8.0/go.mod h1:J5hqkt3O0uAFnINi6JXValWIb1v0goeZM77hZzJN/fQ=
cloud.google.com/go/datastore v1.0.0/go.mod h1:LXYbyblFSglQ5pkeyhO+Qmw7ukd3C+pD7TKLgZqpHYE=
cloud.google.com/go/datastore v1.1.0/go.mod h1:umbIZjpQpHh4hmRpGhH4tLFup+FVzqBi1b3c64qFpCk=
cloud.google.com/go/pubsub v1.0.1/go.mod h1:R0Gpsv3s54REJCy4fxDixWD93lHJMoZTyQ2kNxGRt3I=
cloud.google.com/go/pubsub v1.1.0/go.mod h1:EwwdRX2sKPjnvnqCa270oGRyludottCI76h+R3AArQw=
cloud.google.com/go/pubsub v1.2.0/go.mod h1:jhfEVHT8odbXTkndysNHCcx0awwzvfOlguIAii9o8iA=
cloud.google.com/go/pubsub v1.3.1/go.mod h1:i+ucay31+CNRpDW4Lu78I4xXG+O1r/MAHgjpRVR+TSU=
cloud.google.com/go/storage v1.0.0/go.mod h1:IhtSnM/ZTZV8YYJWCY8RULGVqBDmpoyjwiyrjsg+URw=
cloud.google.com/go/storage v1.5.0/go.mod h1:tpKbwo567HUNpVclU5sGELwQWBDZ8gh0ZeosJ0Rtdos=
cloud.google.com/go/storage v1.6.0/go.mod h1:N7U0C8pVQ/+NIKOBQyamJIeKQKkZ+mxpohlUTyfDhBk=
cloud.google.com/go/storage v1.8.0/go.mod h1:Wv1Oy7z6Yz3DshWRJFhqM/UCfaWIRTdp0RXyy7KQOVs=
cloud.google.com/go/storage v1.10.0/go.mod h1:FLPqc6j+Ki4BU591ie1oL6qBQGu2Bl/tZ9ullr3+Kg0=
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/PuerkitoBio/purell v1.1.1 h1:WEQqlqaGbrPkxLJWfBwQmfEAE1Z7ONdDLqrN38tNFfI=
github.com/PuerkitoBio/purell v1.1.1/go.mod h1:c11w/QuzBsJSee3cPx9rAFu61PvFxuPbtSwDGJws/X0=
github.com/PuerkitoBio/urlesc v0.0.0-20170810143723-de5bf2ad4578 h1:d+Bc7a5rLufV/sSk/8dngufqelfh6jnri85riMAaF/M=
github.com/PuerkitoBio/urlesc v0.0.0-20170810143723-de5bf2ad4578/go.mod h1:uGdkoq3SwY9Y+13GIhn11/XLaGBb4BfwItxLd5jeuXE=
github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU=
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/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/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E=
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/docopt/docopt-go v0.0.0-20180111231733-ee0de3bc6815/go.mod h1:WwZ+bS3ebgob9U8Nd0kOddGdZWjyMGR8Wziv+TBNwSE=
github.com/emicklei/go-restful/v3 v3.8.0 h1:eCZ8ulSerjdAiaNpF7GxXIE7ZCMo1moN1qX+S609eVw=
github.com/emicklei/go-restful/v3 v3.8.0/go.mod h1:6n3XBCmQQb25CM2LCACGz8ukIrRry+4bhvbpWn3mrbc=
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/evanphx/json-patch v4.12.0+incompatible h1:4onqiflcdA9EOZ4RxV643DvftH5pOlLGNtQ5lPWQu84=
github.com/evanphx/json-patch v4.12.0+incompatible/go.mod h1:50XU6AFN0ol/bzJsmQLiYLvXMP4fmwYFNcr97nuDLSk=
github.com/go-gl/glfw v0.0.0-20190409004039-e6da0acd62b1/go.mod h1:vR7hzQXu2zJy9AVAgeJqvqgH9Q5CA+iKCZ2gyEVpxRU=
github.com/go-gl/glfw/v3.3/glfw v0.0.0-20191125211704-12ad95a8df72/go.mod h1:tQ2UAYgL5IevRw8kRxooKSPJfGvJ9fJQFa0TUsXzTg8=
github.com/go-gl/glfw/v3.3/glfw v0.0.0-20200222043503-6f7a984d4dc4/go.mod h1:tQ2UAYgL5IevRw8kRxooKSPJfGvJ9fJQFa0TUsXzTg8=
github.com/go-logr/logr v0.1.0/go.mod h1:ixOQHD9gLJUVQQ2ZOR7zLEifBX6tGkNJF4QyIY7sIas=
github.com/go-logr/logr v1.2.0/go.mod h1:jdQByPbusPIv2/zmleS9BjJVeZ6kBagPoEUsqbVz/1A=
github.com/go-logr/logr v1.2.3 h1:2DntVwHkVopvECVRSlL5PSo9eG+cAkDCuckLubN+rq0=
github.com/go-logr/logr v1.2.3/go.mod h1:jdQByPbusPIv2/zmleS9BjJVeZ6kBagPoEUsqbVz/1A=
github.com/go-openapi/jsonpointer v0.19.3/go.mod h1:Pl9vOtqEWErmShwVjC8pYs9cog34VGT37dQOVbmoatg=
github.com/go-openapi/jsonpointer v0.19.5 h1:gZr+CIYByUqjcgeLXnQu2gHYQC9o73G2XUeOFYEICuY=
github.com/go-openapi/jsonpointer v0.19.5/go.mod h1:Pl9vOtqEWErmShwVjC8pYs9cog34VGT37dQOVbmoatg=
github.com/go-openapi/jsonreference v0.19.5 h1:1WJP/wi4OjB4iV8KVbH73rQaoialJrqv8gitZLxGLtM=
github.com/go-openapi/jsonreference v0.19.5/go.mod h1:RdybgQwPxbL4UEjuAruzK1x3nE69AqPYEJeo/TWfEeg=
github.com/go-openapi/swag v0.19.5/go.mod h1:POnQmlKehdgb5mhVOsnJFsivZCEZ/vjK9gh66Z9tfKk=
github.com/go-openapi/swag v0.19.14 h1:gm3vOOXfiuw5i9p5N9xJvfjvuofpyvLA9Wr6QfK5Fng=
github.com/go-openapi/swag v0.19.14/go.mod h1:QYRuS/SOXUCsnplDa677K7+DxSOj6IPNl/eQntq43wQ=
github.com/gogo/protobuf v1.3.2 h1:Ov1cvc58UF3b5XjBnZv7+opcTcQFZebYjWzi34vdm4Q=
github.com/gogo/protobuf v1.3.2/go.mod h1:P1XiOD3dCwIKUDQYPy72D8LYyHL2YPYrpS2s69NZV8Q=
github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b/go.mod h1:SBH7ygxi8pfUlaOkMMuAQtPIUF8ecWP5IEl/CR7VP2Q=
github.com/golang/groupcache v0.0.0-20190702054246-869f871628b6/go.mod h1:cIg4eruTrX1D+g88fzRXU5OdNfaM+9IcxsU14FzY7Hc=
github.com/golang/groupcache v0.0.0-20191227052852-215e87163ea7/go.mod h1:cIg4eruTrX1D+g88fzRXU5OdNfaM+9IcxsU14FzY7Hc=
github.com/golang/groupcache v0.0.0-20200121045136-8c9f03a8e57e/go.mod h1:cIg4eruTrX1D+g88fzRXU5OdNfaM+9IcxsU14FzY7Hc=
github.com/golang/groupcache v0.0.0-20210331224755-41bb18bfe9da h1:oI5xCqsCo564l8iNU+DwB5epxmsaqB+rhGL0m5jtYqE=
github.com/golang/groupcache v0.0.0-20210331224755-41bb18bfe9da/go.mod h1:cIg4eruTrX1D+g88fzRXU5OdNfaM+9IcxsU14FzY7Hc=
github.com/golang/mock v1.1.1/go.mod h1:oTYuIxOrZwtPieC+H1uAHpcLFnEyAGVDL/k47Jfbm0A=
github.com/golang/mock v1.2.0/go.mod h1:oTYuIxOrZwtPieC+H1uAHpcLFnEyAGVDL/k47Jfbm0A=
github.com/golang/mock v1.3.1/go.mod h1:sBzyDLLjw3U8JLTeZvSv8jJB+tU5PVekmnlKIyFUx0Y=
github.com/golang/mock v1.4.0/go.mod h1:UOMv5ysSaYNkG+OFQykRIcU/QvvxJf3p21QfJ2Bt3cw=
github.com/golang/mock v1.4.1/go.mod h1:UOMv5ysSaYNkG+OFQykRIcU/QvvxJf3p21QfJ2Bt3cw=
github.com/golang/mock v1.4.3/go.mod h1:UOMv5ysSaYNkG+OFQykRIcU/QvvxJf3p21QfJ2Bt3cw=
github.com/golang/mock v1.4.4/go.mod h1:l3mdAwkq5BuhzHwde/uurv3sEJeZMXNpwsxVWU71h+4=
github.com/golang/protobuf v1.2.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
github.com/golang/protobuf v1.3.1/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
github.com/golang/protobuf v1.3.2/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
github.com/golang/protobuf v1.3.3/go.mod h1:vzj43D7+SQXF/4pzW/hwtAqwc6iTitCiVSaWz5lYuqw=
github.com/golang/protobuf v1.3.4/go.mod h1:vzj43D7+SQXF/4pzW/hwtAqwc6iTitCiVSaWz5lYuqw=
github.com/golang/protobuf v1.3.5/go.mod h1:6O5/vntMXwX2lRkT1hjjk0nAC1IDOTvTlVgjlRvqsdk=
github.com/golang/protobuf v1.4.0-rc.1/go.mod h1:ceaxUfeHdC40wWswd/P6IGgMaK3YpKi5j83Wpe3EHw8=
github.com/golang/protobuf v1.4.0-rc.1.0.20200221234624-67d41d38c208/go.mod h1:xKAWHe0F5eneWXFV3EuXVDTCmh+JuBKY0li0aMyXATA=
github.com/golang/protobuf v1.4.0-rc.2/go.mod h1:LlEzMj4AhA7rCAGe4KMBDvJI+AwstrUpVNzEA03Pprs=
github.com/golang/protobuf v1.4.0-rc.4.0.20200313231945-b860323f09d0/go.mod h1:WU3c8KckQ9AFe+yFwt9sWVRKCVIyN9cPHBJSNnbL67w=
github.com/golang/protobuf v1.4.0/go.mod h1:jodUvKwWbYaEsadDk5Fwe5c77LiNKVO9IDvqG2KuDX0=
github.com/golang/protobuf v1.4.1/go.mod h1:U8fpvMrcmy5pZrNK1lt4xCsGvpyWQ/VVv6QDs8UjoX8=
github.com/golang/protobuf v1.4.2/go.mod h1:oDoupMAO8OvCJWAcko0GGGIgR6R6ocIYbsSw735rRwI=
github.com/golang/protobuf v1.5.0/go.mod h1:FsONVRAS9T7sI+LIUmWTfcYkHO4aIWwzhcaSAoJOfIk=
github.com/golang/protobuf v1.5.2 h1:ROPKBNFfQgOUMifHyP+KYbvpjbdoFNs+aK7DXlji0Tw=
github.com/golang/protobuf v1.5.2/go.mod h1:XVQd3VNwM+JqD3oG2Ue2ip4fOMUkwXdXDdiuN0vRsmY=
github.com/google/btree v0.0.0-20180813153112-4030bb1f1f0c/go.mod h1:lNA+9X1NB3Zf8V7Ke586lFgjr2dZNuvo3lPJSGZ5JPQ=
github.com/google/btree v1.0.0/go.mod h1:lNA+9X1NB3Zf8V7Ke586lFgjr2dZNuvo3lPJSGZ5JPQ=
github.com/google/gnostic v0.5.7-v3refs h1:FhTMOKj2VhjpouxvWJAV1TL304uMlb9zcDqkl6cEI54=
github.com/google/gnostic v0.5.7-v3refs/go.mod h1:73MKFl6jIHelAJNaBGFzt3SPtZULs9dYrGFt8OiIsHQ=
github.com/google/go-cmp v0.2.0/go.mod h1:oXzfMopK8JAjlY9xF4vHSVASa0yLyX7SntLO5aqRK0M=
github.com/google/go-cmp v0.3.0/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMywk6iLU=
github.com/google/go-cmp v0.3.1/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMywk6iLU=
github.com/google/go-cmp v0.4.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
github.com/google/go-cmp v0.4.1/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
github.com/google/go-cmp v0.5.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
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github.com/spf13/pflag v1.0.5/go.mod h1:McXfInJRrz4CZXVZOBLb0bTZqETkiAhM9Iw0y3An2Bg=
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github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
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github.com/stretchr/testify v1.8.0/go.mod h1:yNjHg4UonilssWZ8iaSj1OCr/vHnekPRkoO+kdMU+MU=
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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/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=
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golang.org/x/exp v0.0.0-20190829153037-c13cbed26979/go.mod h1:86+5VVa7VpoJ4kLfm080zCjGlMRFzhUhsZKEZO7MGek=
golang.org/x/exp v0.0.0-20191030013958-a1ab85dbe136/go.mod h1:JXzH8nQsPlswgeRAPE3MuO9GYsAcnJvJ4vnMwN/5qkY=
golang.org/x/exp v0.0.0-20191129062945-2f5052295587/go.mod h1:2RIsYlXP63K8oxa1u096TMicItID8zy7Y6sNkU49FU4=
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golang.org/x/exp v0.0.0-20200119233911-0405dc783f0a/go.mod h1:2RIsYlXP63K8oxa1u096TMicItID8zy7Y6sNkU49FU4=
golang.org/x/exp v0.0.0-20200207192155-f17229e696bd/go.mod h1:J/WKrq2StrnmMY6+EHIKF9dgMWnmCNThgcyBT1FY9mM=
golang.org/x/exp v0.0.0-20200224162631-6cc2880d07d6/go.mod h1:3jZMyOhIsHpP37uCMkUooju7aAi5cS1Q23tOzKc+0MU=
golang.org/x/image v0.0.0-20190227222117-0694c2d4d067/go.mod h1:kZ7UVZpmo3dzQBMxlp+ypCbDeSB+sBbTgSJuh5dn5js=
golang.org/x/image v0.0.0-20190802002840-cff245a6509b/go.mod h1:FeLwcggjj3mMvU+oOTbSwawSJRM1uh48EjtB4UJZlP0=
golang.org/x/lint v0.0.0-20181026193005-c67002cb31c3/go.mod h1:UVdnD1Gm6xHRNCYTkRU2/jEulfH38KcIWyp/GAMgvoE=
golang.org/x/lint v0.0.0-20190227174305-5b3e6a55c961/go.mod h1:wehouNa3lNwaWXcvxsM5YxQ5yQlVC4a0KAMCusXpPoU=
golang.org/x/lint v0.0.0-20190301231843-5614ed5bae6f/go.mod h1:UVdnD1Gm6xHRNCYTkRU2/jEulfH38KcIWyp/GAMgvoE=
golang.org/x/lint v0.0.0-20190313153728-d0100b6bd8b3/go.mod h1:6SW0HCj/g11FgYtHlgUYUwCkIfeOF89ocIRzGO/8vkc=
golang.org/x/lint v0.0.0-20190409202823-959b441ac422/go.mod h1:6SW0HCj/g11FgYtHlgUYUwCkIfeOF89ocIRzGO/8vkc=
golang.org/x/lint v0.0.0-20190909230951-414d861bb4ac/go.mod h1:6SW0HCj/g11FgYtHlgUYUwCkIfeOF89ocIRzGO/8vkc=
golang.org/x/lint v0.0.0-20190930215403-16217165b5de/go.mod h1:6SW0HCj/g11FgYtHlgUYUwCkIfeOF89ocIRzGO/8vkc=
golang.org/x/lint v0.0.0-20191125180803-fdd1cda4f05f/go.mod h1:5qLYkcX4OjUUV8bRuDixDT3tpyyb+LUpUlRWLxfhWrs=
golang.org/x/lint v0.0.0-20200130185559-910be7a94367/go.mod h1:3xt1FjdF8hUf6vQPIChWIBhFzV8gjjsPE/fR3IyQdNY=
golang.org/x/lint v0.0.0-20200302205851-738671d3881b/go.mod h1:3xt1FjdF8hUf6vQPIChWIBhFzV8gjjsPE/fR3IyQdNY=
golang.org/x/mobile v0.0.0-20190312151609-d3739f865fa6/go.mod h1:z+o9i4GpDbdi3rU15maQ/Ox0txvL9dWGYEHz965HBQE=
golang.org/x/mobile v0.0.0-20190719004257-d2bd2a29d028/go.mod h1:E/iHnbuqvinMTCcRqshq8CkpyQDoeVncDDYHnLhea+o=
golang.org/x/mod v0.0.0-20190513183733-4bf6d317e70e/go.mod h1:mXi4GBBbnImb6dmsKGUJ2LatrhH/nqhxcFungHvyanc=
golang.org/x/mod v0.1.0/go.mod h1:0QHyrYULN0/3qlju5TqG8bIK38QM8yzMo5ekMj3DlcY=
golang.org/x/mod v0.1.1-0.20191105210325-c90efee705ee/go.mod h1:QqPTAvyqsEbceGzBzNggFXnrqF1CaUcvgkdR5Ot7KZg=
golang.org/x/mod v0.1.1-0.20191107180719-034126e5016b/go.mod h1:QqPTAvyqsEbceGzBzNggFXnrqF1CaUcvgkdR5Ot7KZg=
golang.org/x/mod v0.2.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
golang.org/x/mod v0.3.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
golang.org/x/net v0.0.0-20180724234803-3673e40ba225/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
golang.org/x/net v0.0.0-20180826012351-8a410e7b638d/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
golang.org/x/net v0.0.0-20190108225652-1e06a53dbb7e/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
golang.org/x/net v0.0.0-20190213061140-3a22650c66bd/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
golang.org/x/net v0.0.0-20190311183353-d8887717615a/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
golang.org/x/net v0.0.0-20190501004415-9ce7a6920f09/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
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rsc.io/binaryregexp v0.2.0/go.mod h1:qTv7/COck+e2FymRvadv62gMdZztPaShugOCi3I+8D8=
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/json v0.0.0-20220713155537-f223a00ba0e2 h1:iXTIw73aPyC+oRdyqqvVJuloN1p0AC/kzH07hu3NE+k=
sigs.k8s.io/json v0.0.0-20220713155537-f223a00ba0e2/go.mod h1:B8JuhiUyNFVKdsE8h686QcCxMaH6HrOAZj4vswFpcB0=
sigs.k8s.io/structured-merge-diff/v4 v4.2.3 h1:PRbqxJClWWYMNV1dhaG4NsibJbArud9kFxnAMREiWFE=
sigs.k8s.io/structured-merge-diff/v4 v4.2.3/go.mod h1:qjx8mGObPmV2aSZepjQjbmb2ihdVs8cGKBraizNC69E=
sigs.k8s.io/yaml v1.3.0 h1:a2VclLzOGrwOHDiV8EfBGhvjHvP46CtW5j6POvhYGGo=
sigs.k8s.io/yaml v1.3.0/go.mod h1:GeOyir5tyXNByN85N/dRIT9es5UQNerPYEKK56eTBm8=

59
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/*
Copyright 2023 The Kubernetes Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package pods
import (
"time"
v1 "k8s.io/api/core/v1"
)
// Summary contains information about the total observed number of pods within a
// group, number of running, as well as the count of those who failed to
// start within the deadline.
type Summary struct {
// Total is the total observed number of pods that are either running or
// about to be started.
Total int32
// Running is the number of running pods.
Running int32
// NotStartedWithinDeadline is the number of pods that not only has not
// fully stared (not scheduled or not fully started, in phase PodPending)
// but also has been in the not started phase for a while.
NotStartedWithinDeadline int32
}
// CalculateSummary calculates the Summary structure for the given set of pod
// and startup constraint.
func CalculateSummary(podList []*v1.Pod, now time.Time, startupTimeout time.Duration) Summary {
result := Summary{}
for _, p := range podList {
switch p.Status.Phase {
case v1.PodRunning:
result.Total++
result.Running++
break
case v1.PodPending:
result.Total++
if p.CreationTimestamp.Add(startupTimeout).Before(now) {
result.NotStartedWithinDeadline++
}
break
}
}
return result
}

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/*
Copyright 2023 The Kubernetes Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package pods
import (
"fmt"
"testing"
"time"
"github.com/stretchr/testify/assert"
v1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
)
func newPod(name string, phase v1.PodPhase, createTime time.Time) *v1.Pod {
return &v1.Pod{
ObjectMeta: metav1.ObjectMeta{
Name: name,
Namespace: "default",
CreationTimestamp: metav1.NewTime(createTime),
},
Status: v1.PodStatus{
Phase: phase,
},
}
}
func TestCalculateSummary(t *testing.T) {
now := time.Now()
timeout := time.Minute * 5
tests := []struct {
name string
pods []*v1.Pod
expected Summary
}{
{
name: "basic running/pending",
pods: []*v1.Pod{
newPod("a", v1.PodRunning, now.Add(-time.Hour)),
newPod("a2", v1.PodRunning, now.Add(-time.Hour)),
newPod("b", v1.PodPending, now.Add(-time.Minute)),
},
expected: Summary{
Total: 3,
Running: 2,
},
},
{
name: "skip completed",
pods: []*v1.Pod{
newPod("a", v1.PodSucceeded, now.Add(-time.Hour)),
newPod("c", v1.PodFailed, now.Add(-time.Hour)),
},
expected: Summary{
Total: 0,
},
},
{
name: "deadline",
pods: []*v1.Pod{
newPod("a", v1.PodPending, now.Add(-time.Hour)),
},
expected: Summary{
Total: 1,
NotStartedWithinDeadline: 1,
},
},
{
name: "mix",
pods: []*v1.Pod{
newPod("problem", v1.PodPending, now.Add(-time.Hour)),
newPod("b", v1.PodRunning, now.Add(-time.Hour)),
newPod("b2", v1.PodRunning, now.Add(-time.Hour)),
newPod("c", v1.PodFailed, now.Add(-time.Hour)),
},
expected: Summary{
Total: 3,
Running: 2,
NotStartedWithinDeadline: 1,
},
},
}
for i, tc := range tests {
t.Run(fmt.Sprintf("%d: %s", i, tc.name), func(t *testing.T) {
result := CalculateSummary(tc.pods, now, timeout)
assert.Equal(t, tc.expected, result)
})
}
}

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/*
Copyright 2023 The Kubernetes Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package policy
import (
"fmt"
"k8s.io/autoscaling/balancer/pkg/apis/balancer.x-k8s.io/v1alpha1"
"k8s.io/autoscaling/balancer/pkg/pods"
)
// GetPlacement calculates the placement for the given balancer and pod summary
// information for individual balancer targets.
func GetPlacement(balancer *v1alpha1.Balancer, summaries map[string]pods.Summary) (ReplicaPlacement, PlacementProblems, error) {
targetMap := buildTargetMap(balancer.Spec.Targets)
switch balancer.Spec.Policy.PolicyName {
case v1alpha1.PriorityPolicyName:
if balancer.Spec.Policy.Priorities == nil {
return nil, PlacementProblems{}, fmt.Errorf("incomplete policy definition: missing priorities")
}
if balancer.Spec.Policy.Priorities.TargetOrder == nil {
return nil, PlacementProblems{}, fmt.Errorf("incomplete policy definition: missing targetOrder")
}
infos := buildTargetInfoMapForPriority(targetMap, summaries)
placement, problems := distributeByPriority(balancer.Spec.Replicas, balancer.Spec.Policy.Priorities.TargetOrder, infos)
return placement, problems, nil
case v1alpha1.ProportionalPolicyName:
if balancer.Spec.Policy.Proportions == nil {
return nil, PlacementProblems{}, fmt.Errorf("incomplete policy definition: missing proportions")
}
if balancer.Spec.Policy.Proportions.TargetProportions == nil {
return nil, PlacementProblems{}, fmt.Errorf("incomplete policy definition: missing targetProportions")
}
infos := buildTargetInfoMapForProportional(targetMap, summaries, balancer.Spec.Policy.Proportions.TargetProportions)
placement, problems := distributeByProportions(balancer.Spec.Replicas, infos)
return placement, problems, nil
default:
return nil, PlacementProblems{}, fmt.Errorf("policy not supported: %v", balancer.Spec.Policy.PolicyName)
}
}

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/*
Copyright 2023 The Kubernetes Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package policy
// Main algorithm of the priority policy. The function returns the
// desired replica placement and information about problems that
// possibly happened during placement.
func distributeByPriority(replicas int32,
priorities []string, infos map[string]*targetInfo) (ReplicaPlacement, PlacementProblems) {
placement := make(ReplicaPlacement)
problems := PlacementProblems{}
// Place target minimums
for k, info := range infos {
placement[k] = info.min
replicas -= placement[k]
}
// continue computations as there still may be fallbacks.
if replicas < 0 {
problems.MissingReplicas = -replicas
replicas = 0
}
for _, key := range priorities {
info := infos[key]
free := info.max - placement[key]
if replicas < free {
placement[key] += replicas
replicas = 0
} else {
placement[key] += free
replicas -= free
}
// calculate how many may need to fall back to the other target = all new plus
// and those that are past deadline.
if infos[key].summary.NotStartedWithinDeadline > 0 {
fallback := info.summary.NotStartedWithinDeadline + placement[key] - info.summary.Total
if fallback > 0 {
replicas += fallback
}
}
}
if replicas > 0 {
problems.OverflowReplicas = replicas
}
return placement, problems
}

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/*
Copyright 2023 The Kubernetes Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package policy
import (
"fmt"
"testing"
"github.com/stretchr/testify/assert"
"k8s.io/autoscaling/balancer/pkg/pods"
)
func TestDistributeByPriority(t *testing.T) {
tests := []struct {
name string
replicas int32
infos map[string]*targetInfo
priorities []string
expected ReplicaPlacement
problems PlacementProblems
}{
{
name: "10 replicas, no max",
replicas: 10,
infos: map[string]*targetInfo{
"a": {max: maxReplicas},
"b": {max: maxReplicas},
},
priorities: []string{"a", "b"},
expected: ReplicaPlacement{"a": 10, "b": 0},
},
{
name: "10 replicas, one max",
replicas: 10,
infos: map[string]*targetInfo{
"a": {max: 3},
"b": {max: maxReplicas},
},
priorities: []string{"a", "b"},
expected: ReplicaPlacement{"a": 3, "b": 7},
},
{
name: "10 replicas, two max",
replicas: 10,
infos: map[string]*targetInfo{
"a": {max: 3},
"b": {max: 4},
},
priorities: []string{"a", "b"},
expected: ReplicaPlacement{"a": 3, "b": 4},
problems: PlacementProblems{OverflowReplicas: 3},
},
{
name: "10 replicas, two mins",
replicas: 10,
infos: map[string]*targetInfo{
"a": {min: 2, max: maxReplicas},
"b": {min: 3, max: maxReplicas},
},
priorities: []string{"a", "b"},
expected: ReplicaPlacement{"a": 7, "b": 3},
},
{
name: "1 replica, missing 4",
replicas: 1,
infos: map[string]*targetInfo{
"a": {min: 2, max: maxReplicas},
"b": {min: 3, max: maxReplicas},
},
priorities: []string{"a", "b"},
expected: ReplicaPlacement{"a": 2, "b": 3},
problems: PlacementProblems{MissingReplicas: 4},
},
{
name: "10 replicas, two mins, two max",
replicas: 10,
infos: map[string]*targetInfo{
"a": {min: 2, max: 4},
"b": {min: 3, max: 5},
},
priorities: []string{"a", "b"},
expected: ReplicaPlacement{"a": 4, "b": 5},
problems: PlacementProblems{OverflowReplicas: 1},
},
{
name: "10 replicas, fallback",
replicas: 10,
infos: map[string]*targetInfo{
"a": {max: maxReplicas,
summary: pods.Summary{
Total: 3, NotStartedWithinDeadline: 2}},
"b": {max: maxReplicas},
},
priorities: []string{"a", "b"},
expected: ReplicaPlacement{"a": 10, "b": 9},
},
{
name: "6 replica, fallback in min",
replicas: 6,
infos: map[string]*targetInfo{
"a": {min: 3, max: maxReplicas,
summary: pods.Summary{
Total: 3, NotStartedWithinDeadline: 3}},
"b": {min: 3, max: maxReplicas},
},
priorities: []string{"a", "b"},
expected: ReplicaPlacement{"a": 3, "b": 6},
},
{
name: "10 replicas, double fallback",
replicas: 10,
infos: map[string]*targetInfo{
"a": {max: maxReplicas,
summary: pods.Summary{
Total: 3, NotStartedWithinDeadline: 2}},
"b": {max: maxReplicas,
summary: pods.Summary{
Total: 3, NotStartedWithinDeadline: 2}},
},
priorities: []string{"a", "b"},
expected: ReplicaPlacement{"a": 10, "b": 9},
// one is running in both "a" and "b", rest is problematic.
problems: PlacementProblems{OverflowReplicas: 8},
},
{
name: "20 replica, double fallback hitting max",
replicas: 20,
infos: map[string]*targetInfo{
"a": {max: 10,
summary: pods.Summary{
Total: 3, NotStartedWithinDeadline: 2}},
"b": {max: 10,
summary: pods.Summary{
Total: 3, NotStartedWithinDeadline: 2}},
},
priorities: []string{"a", "b"},
expected: ReplicaPlacement{"a": 10, "b": 10},
// one is running in both "a" and "b", rest is problematic.
problems: PlacementProblems{OverflowReplicas: 18},
},
{
name: "10 replicas, double problems (policy change) but hopefully problematic pods are dropped first",
replicas: 10,
infos: map[string]*targetInfo{
"a": {max: 10,
summary: pods.Summary{
Total: 15, NotStartedWithinDeadline: 2}},
"b": {max: 10,
summary: pods.Summary{
Total: 15, NotStartedWithinDeadline: 2}},
},
priorities: []string{"a", "b"},
expected: ReplicaPlacement{"a": 10, "b": 0},
},
{
name: "10 replicas, single fallback",
replicas: 10,
infos: map[string]*targetInfo{
"a": {max: maxReplicas,
summary: pods.Summary{
Total: 3, NotStartedWithinDeadline: 2}},
"b": {max: maxReplicas,
summary: pods.Summary{
Total: 3, NotStartedWithinDeadline: 0}},
},
priorities: []string{"a", "b"},
expected: ReplicaPlacement{"a": 10, "b": 9},
},
}
for i, tc := range tests {
t.Run(fmt.Sprintf("%d: %s", i, tc.name), func(t *testing.T) {
result, problems := distributeByPriority(tc.replicas, tc.priorities, tc.infos)
assert.Equal(t, tc.expected, result)
assert.Equal(t, tc.problems, problems)
})
}
}

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/*
Copyright 2023 The Kubernetes Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package policy
import (
"sort"
)
// Returns a sorted subset of the given keys that has some available
// capacity (placement < max). Sorting is required for the stability
// of the algorithm - every time we should process targets in the same
// order so replicas are not flapping between targets.
func sortedKeysWithCapacity(keys []string, placement ReplicaPlacement,
infos map[string]*targetInfo) []string {
result := make([]string, 0)
for _, k := range keys {
allocated := placement[k]
if infos[k].max <= allocated {
continue
}
result = append(result, k)
}
sort.Strings(result)
return result
}
// Main algorithm of the proportional policy. The function returns the
// desired replica placement and information about problems.
func distributeByProportions(replicas int32,
infos map[string]*targetInfo) (ReplicaPlacement, PlacementProblems) {
placement := make(ReplicaPlacement)
problems := PlacementProblems{}
keys := make([]string, 0)
for k := range infos {
keys = append(keys, k)
}
// Place target minimums.
for _, k := range keys {
info := infos[k]
placement[k] = info.min
replicas -= placement[k]
}
// continue computations as there still may be fallbacks.
if replicas < 0 {
problems.MissingReplicas = -replicas
replicas = 0
}
// Do the fist pass with proportions, ignoring not started replicas.
replicas = distributeGroupProportionally(replicas, keys, infos, placement)
// All targets are full. Not possible to place more, so no fallback.
if replicas > 0 {
problems.OverflowReplicas = replicas
return placement, problems
}
// Checks which targets have troubles and calculates the number
// of replicas that need to be duplicated in other targets until
// the base targets recover.
notBlockedKeys := make([]string, 0)
for _, key := range keys {
info := infos[key]
if info.summary.NotStartedWithinDeadline > 0 {
fallback := info.summary.NotStartedWithinDeadline + placement[key] - info.summary.Total
if fallback > 0 {
replicas += fallback
}
} else {
notBlockedKeys = append(notBlockedKeys, key)
}
}
// If there are some replicas that need to be duplicated, distribute them,
// but only among non-problematic targets.
if replicas > 0 {
replicas = distributeGroupProportionally(replicas, notBlockedKeys, infos, placement)
}
problems.OverflowReplicas = replicas
return placement, problems
}
// Distributes replicas among the given target keys, using the provided proportions.
// The passed replicaPlacement is updated and the return value is the number
// of replicas that could not be placed. It uses D'Hondt method for distributing
// replicas. See https://en.wikipedia.org/wiki/D%27Hondt_method.
func distributeGroupProportionally(replicas int32, keys []string,
infos map[string]*targetInfo, placement ReplicaPlacement) int32 {
okKeys := sortedKeysWithCapacity(keys, placement, infos)
for ; replicas > 0; replicas-- {
bestKey := ""
bestValue := 0.0
for _, k := range okKeys {
if placement[k] >= infos[k].max {
continue
}
rank := float64(infos[k].proportion) / float64((1 + placement[k]))
if rank > bestValue {
bestKey = k
bestValue = rank
}
}
if bestKey == "" {
break
}
placement[bestKey] += 1
}
return replicas
}

277
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/*
Copyright 2023 The Kubernetes Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package policy
import (
"fmt"
"testing"
"github.com/stretchr/testify/assert"
"k8s.io/autoscaling/balancer/pkg/pods"
)
func TestDistributeByProportions(t *testing.T) {
tests := []struct {
name string
replicas int32
infos map[string]*targetInfo
expected ReplicaPlacement
problems PlacementProblems
}{
{
name: "1 replica, 50/50",
replicas: 1,
infos: map[string]*targetInfo{
"a": {proportion: 50, max: maxReplicas},
"b": {proportion: 50, max: maxReplicas},
},
expected: ReplicaPlacement{"a": 1, "b": 0},
},
{
name: "1 replica, 33/33/33",
replicas: 1,
infos: map[string]*targetInfo{
"a": {proportion: 50, max: maxReplicas},
"b": {proportion: 50, max: maxReplicas},
"c": {proportion: 50, max: maxReplicas},
},
expected: ReplicaPlacement{"a": 1, "b": 0, "c": 0},
},
{
name: "2 replica, 33/33/33",
replicas: 2,
infos: map[string]*targetInfo{
"a": {proportion: 50, max: maxReplicas},
"b": {proportion: 50, max: maxReplicas},
"c": {proportion: 50, max: maxReplicas},
},
expected: ReplicaPlacement{"a": 1, "b": 1, "c": 0},
},
{
name: "10 replicas, 50/50",
replicas: 10,
infos: map[string]*targetInfo{
"a": {proportion: 50, max: maxReplicas},
"b": {proportion: 50, max: maxReplicas},
},
expected: ReplicaPlacement{"a": 5, "b": 5},
},
{
name: "10 replicas, 70/30",
replicas: 10,
infos: map[string]*targetInfo{
"a": {proportion: 70, max: maxReplicas},
"b": {proportion: 30, max: maxReplicas},
},
expected: ReplicaPlacement{"a": 7, "b": 3},
},
{
name: "100 replicas, 70/30",
replicas: 100,
infos: map[string]*targetInfo{
"a": {proportion: 70, max: maxReplicas},
"b": {proportion: 30, max: maxReplicas},
},
expected: ReplicaPlacement{"a": 70, "b": 30},
},
{
name: "11 replicas, 50/50, stability test",
replicas: 11,
infos: map[string]*targetInfo{
"a": {proportion: 50, max: maxReplicas},
"b": {proportion: 50, max: maxReplicas},
},
expected: ReplicaPlacement{"a": 6, "b": 5},
},
{
name: "10 replicas, 50/50, one max",
replicas: 10,
infos: map[string]*targetInfo{
"a": {proportion: 50, max: 3},
"b": {proportion: 50, max: maxReplicas},
},
expected: ReplicaPlacement{"a": 3, "b": 7},
},
{
name: "10 replicas, 50/50, two max",
replicas: 10,
infos: map[string]*targetInfo{
"a": {proportion: 50, max: 3},
"b": {proportion: 50, max: 2},
},
expected: ReplicaPlacement{"a": 3, "b": 2},
problems: PlacementProblems{OverflowReplicas: 5},
},
{
name: "10 replicas, 50/50, one small min",
replicas: 10,
infos: map[string]*targetInfo{
"a": {proportion: 50, min: 3, max: maxReplicas},
"b": {proportion: 50, max: maxReplicas},
},
expected: ReplicaPlacement{"a": 5, "b": 5},
},
{
name: "10 replicas, 50/50, one big min",
replicas: 10,
infos: map[string]*targetInfo{
"a": {proportion: 50, min: 7, max: maxReplicas},
"b": {proportion: 50, max: maxReplicas},
},
expected: ReplicaPlacement{"a": 7, "b": 3},
},
{
name: "10 replicas, 50/50, one huge min",
replicas: 10,
infos: map[string]*targetInfo{
"a": {proportion: 50, min: 20, max: maxReplicas},
"b": {proportion: 50, max: maxReplicas},
},
expected: ReplicaPlacement{"a": 20, "b": 0},
problems: PlacementProblems{MissingReplicas: 10},
},
{
name: "10 replicas, 50/50, two small min",
replicas: 10,
infos: map[string]*targetInfo{
"a": {proportion: 50, min: 3, max: maxReplicas},
"b": {proportion: 50, min: 4, max: maxReplicas},
},
expected: ReplicaPlacement{"a": 5, "b": 5},
},
{
name: "10 replicas, 50/50, two small min, one max",
replicas: 10,
infos: map[string]*targetInfo{
"a": {proportion: 50, min: 3, max: 3},
"b": {proportion: 50, min: 4, max: maxReplicas},
},
expected: ReplicaPlacement{"a": 3, "b": 7},
},
{
name: "10 replicas, 50/50, two small min, two max",
replicas: 10,
infos: map[string]*targetInfo{
"a": {proportion: 50, min: 3, max: 3},
"b": {proportion: 50, min: 4, max: 6},
},
expected: ReplicaPlacement{"a": 3, "b": 6},
problems: PlacementProblems{OverflowReplicas: 1},
},
{
name: "20 replicas, 70/20/10, one max",
replicas: 20,
infos: map[string]*targetInfo{
"a": {proportion: 70, max: 5},
"b": {proportion: 20, max: maxReplicas},
"c": {proportion: 10, max: maxReplicas},
},
expected: ReplicaPlacement{"a": 5, "b": 10, "c": 5},
},
{
name: "20 replicas, 48/48/4, two small min, two max",
replicas: 20,
infos: map[string]*targetInfo{
"a": {proportion: 48, min: 2, max: 5},
"b": {proportion: 48, min: 2, max: 5},
"c": {proportion: 4, min: 2, max: maxReplicas},
},
expected: ReplicaPlacement{"a": 5, "b": 5, "c": 10},
},
{
name: "10 replicas, 50/50, fallback of 2/5 ",
replicas: 10,
infos: map[string]*targetInfo{
"a": {proportion: 50, min: 0, max: maxReplicas, summary: pods.Summary{
Total: 5,
NotStartedWithinDeadline: 2,
}},
"b": {proportion: 50, min: 0, max: maxReplicas},
},
expected: ReplicaPlacement{"a": 5, "b": 7},
},
{
name: "6 replicas, 50/50, fallback in min ",
replicas: 6,
infos: map[string]*targetInfo{
"a": {proportion: 50, min: 3, max: maxReplicas, summary: pods.Summary{
Total: 3,
NotStartedWithinDeadline: 3,
}},
"b": {proportion: 50, min: 3, max: maxReplicas},
},
expected: ReplicaPlacement{"a": 3, "b": 6},
},
{
name: "10 replicas, 50/50, fallback of 2/3 + 2 that are likely to fail ",
replicas: 10,
infos: map[string]*targetInfo{
"a": {proportion: 50, min: 0, max: maxReplicas, summary: pods.Summary{
Total: 3,
NotStartedWithinDeadline: 2,
}},
"b": {proportion: 50, min: 0, max: maxReplicas},
},
expected: ReplicaPlacement{"a": 5, "b": 9},
},
{
name: "18 replicas, 50/50, with max, fallback of 2/9",
replicas: 18,
infos: map[string]*targetInfo{
"a": {proportion: 50, min: 0, max: 10, summary: pods.Summary{
Total: 9,
NotStartedWithinDeadline: 2,
}},
"b": {proportion: 50, min: 0, max: 10},
},
expected: ReplicaPlacement{"a": 9, "b": 10},
problems: PlacementProblems{OverflowReplicas: 1},
},
{
name: "20 replicas, 50/50, with imbalance and fallback",
replicas: 20,
infos: map[string]*targetInfo{
"a": {proportion: 50, min: 0, max: maxReplicas, summary: pods.Summary{
Total: 15,
NotStartedWithinDeadline: 3,
}},
"b": {proportion: 50, min: 0, max: maxReplicas},
},
expected: ReplicaPlacement{"a": 10, "b": 10},
},
{
name: "20 replicas, 50/50, with too few and fallback",
replicas: 20,
infos: map[string]*targetInfo{
"a": {proportion: 50, min: 0, max: maxReplicas, summary: pods.Summary{
Total: 3,
NotStartedWithinDeadline: 3,
}},
"b": {proportion: 50, min: 0, max: maxReplicas},
},
expected: ReplicaPlacement{"a": 10, "b": 20},
},
}
for i, tc := range tests {
t.Run(fmt.Sprintf("%d: %s", i, tc.name), func(t *testing.T) {
result, problems := distributeByProportions(tc.replicas, tc.infos)
assert.Equal(t, tc.expected, result)
assert.Equal(t, tc.problems, problems)
})
}
}

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balancer/pkg/policy/utils.go Normal file
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/*
Copyright 2023 The Kubernetes Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package policy
import (
"k8s.io/autoscaling/balancer/pkg/apis/balancer.x-k8s.io/v1alpha1"
"k8s.io/autoscaling/balancer/pkg/pods"
)
const (
// maxReplicas is the maximum number of replicas supported by the algorithm.
// It is used as a sentinel value to simplify the code.
maxReplicas = 1000000000
)
// buildTargetMap build map of BalancerTargets, keyed with target's name.
func buildTargetMap(targets []v1alpha1.BalancerTarget) map[string]v1alpha1.BalancerTarget {
result := make(map[string]v1alpha1.BalancerTarget)
for _, target := range targets {
result[target.Name] = target
}
return result
}
// ReplicaPlacement defines the number of replicas for each of the BalancerTargets.
type ReplicaPlacement map[string]int32
// targetInfo is the aggregated information about a Balancer target.
type targetInfo struct {
// min replica count taken from BalancerTarget.
min int32
// max replica count taken from BalancerTarget.
max int32
// count of pods of given type based on pod listener data.
summary pods.Summary
// proportion taken from ProportionalPolicy. 0 for other policies.
proportion int32
}
// PlacementProblems contains information about replicas that were problematic
// when applying placement policy and constraints.
type PlacementProblems struct {
// MissingReplicas is the number of replicas that had to be added
// on top of the desired count to match the constraint and policy.
MissingReplicas int32
// OverflowReplicas is the number of replicas that could not be placed
// due to constraints and policy.
OverflowReplicas int32
}
// buildTargetInfoMap aggregates information scattered across multiple
// maps into a single one. It assumes that all inputs are already validated
// and consistent.
func buildTargetInfoMapForProportional(
targetMap map[string]v1alpha1.BalancerTarget,
summaryMap map[string]pods.Summary,
proportions map[string]int32) map[string]*targetInfo {
result := make(map[string]*targetInfo)
for name, target := range targetMap {
summary := summaryMap[name]
prop := proportions[name]
result[name] = &targetInfo{
proportion: prop,
summary: summary,
min: 0,
max: maxReplicas,
}
if target.MinReplicas != nil {
result[name].min = *target.MinReplicas
}
if target.MaxReplicas != nil {
result[name].max = *target.MaxReplicas
}
}
return result
}
// buildTargetInfoMap aggregates information scattered across multiple
// maps into a single one. It assumes that all inputs are already validated
// and consistent.
func buildTargetInfoMapForPriority(
targetMap map[string]v1alpha1.BalancerTarget,
summaryMap map[string]pods.Summary) map[string]*targetInfo {
return buildTargetInfoMapForProportional(targetMap, summaryMap, map[string]int32{})
}