upgrade to latest dependencies (#1417)

bumping knative.dev/eventing 5c7b553...0c41e6d:
  > 0c41e6d Fix ci (# 5629)
  > e340077 upgrade to latest dependencies (# 5626)
  > e7445c5 Enable OPTIONS and CloudEvent Webhook headers (# 5542)
  > ca9e469 Prevent teardown in ugprade tests on failure (# 5624)
  > 8551625 Update actions (# 5627)
bumping knative.dev/serving ac8d05d...5ad15df:
  > 5ad15df short name (# 11788)
  > d0d882f fix scrape_time metric registration (# 11778)
  > af1ada2 Add test for readiness behaviour after startup when periodSeconds is 0 (# 11768)
  > 9e96a38 Update net-contour nightly (# 11782)
  > cbbffd9 Update net-kourier nightly (# 11780)
  > d236674 Update net-istio nightly (# 11779)
  > e6a15b0 Update net-certmanager nightly (# 11781)
  > b415c53 Fix TestContainerErrorMsg failures against DockerHub (# 11751)
  > ffda04b Update actions (# 11777)
  > dd83fd9 add memory metrics for hpa (# 11668)
  > b744943 Reduce allocations from the timeout handler by pooling the timers (# 11771)
  > f4f721b Update net-certmanager nightly (# 11773)
  > 60159d8 Add a benchmark for the TimeToFirstByteTimeoutHandler (# 11766)
  > 85af882 Always set `ENABLE_HTTP2_AUTO_DETECTION` envvar (# 11760)
  > db42cb6 Update net-kourier nightly (# 11776)
  > cc8e07f Update net-contour nightly (# 11775)
  > 869ef86 Update net-istio nightly (# 11774)
  > 019b501 Use zero value in default case to clean up tests (# 11772)
  > 8a7848b upgrade to latest dependencies (# 11770)

Signed-off-by: Knative Automation <automation@knative.team>

go.mod

@@ -18,11 +18,11 @@ require (
 	k8s.io/cli-runtime v0.20.7
 	k8s.io/client-go v0.20.7
 	k8s.io/code-generator v0.20.7
-	knative.dev/eventing v0.24.1-0.20210803173815-5c7b55336efd
+	knative.dev/eventing v0.24.1-0.20210809153712-0c41e6d42127
 	knative.dev/hack v0.0.0-20210622141627-e28525d8d260
 	knative.dev/networking v0.0.0-20210803181815-acdfd41c575c
 	knative.dev/pkg v0.0.0-20210803160015-21eb4c167cc5
-	knative.dev/serving v0.24.1-0.20210803152115-ac8d05d5cebd
+	knative.dev/serving v0.24.1-0.20210806230708-5ad15dff1c94
 	sigs.k8s.io/yaml v1.2.0
 )
 

go.sum

@@ -45,7 +45,6 @@ contrib.go.opencensus.io/exporter/ocagent v0.7.1-0.20200907061046-05415f1de66d h
 contrib.go.opencensus.io/exporter/ocagent v0.7.1-0.20200907061046-05415f1de66d/go.mod h1:IshRmMJBhDfFj5Y67nVhMYTTIze91RUeT73ipWKs/GY=
 contrib.go.opencensus.io/exporter/prometheus v0.3.0 h1:08FMdJYpItzsknogU6PiiNo7XQZg/25GjH236+YCwD0=
 contrib.go.opencensus.io/exporter/prometheus v0.3.0/go.mod h1:rpCPVQKhiyH8oomWgm34ZmgIdZa8OVYO5WAIygPbBBE=
-contrib.go.opencensus.io/exporter/stackdriver v0.13.5/go.mod h1:aXENhDJ1Y4lIg4EUaVTwzvYETVNZk10Pu26tevFKLUc=
 contrib.go.opencensus.io/exporter/zipkin v0.1.2/go.mod h1:mP5xM3rrgOjpn79MM8fZbj3gsxcuytSqtH0dxSWW1RE=
 dmitri.shuralyov.com/gpu/mtl v0.0.0-20190408044501-666a987793e9/go.mod h1:H6x//7gZCb22OMCxBHrMx7a5I7Hp++hsVxbQ4BYO7hU=
 github.com/Azure/azure-sdk-for-go v16.2.1+incompatible/go.mod h1:9XXNKU+eRnpl9moKnB4QOLf1HestfXbmab5FXxiDBjc=
@@ -137,10 +136,8 @@ github.com/aryann/difflib v0.0.0-20170710044230-e206f873d14a/go.mod h1:DAHtR1m6l
 github.com/asaskevich/govalidator v0.0.0-20190424111038-f61b66f89f4a/go.mod h1:lB+ZfQJz7igIIfQNfa7Ml4HSf2uFQQRzpGGRXenZAgY=
 github.com/aws/aws-lambda-go v1.13.3/go.mod h1:4UKl9IzQMoD+QF79YdCuzCwp8VbmG4VAQwij/eHl5CU=
 github.com/aws/aws-sdk-go v1.15.11/go.mod h1:mFuSZ37Z9YOHbQEwBWztmVzqXrEkub65tZoCYDt7FT0=
-github.com/aws/aws-sdk-go v1.23.20/go.mod h1:KmX6BPdI08NWTb3/sm4ZGu5ShLoqVDhKgpiN924inxo=
 github.com/aws/aws-sdk-go v1.27.0/go.mod h1:KmX6BPdI08NWTb3/sm4ZGu5ShLoqVDhKgpiN924inxo=
 github.com/aws/aws-sdk-go v1.28.2/go.mod h1:KmX6BPdI08NWTb3/sm4ZGu5ShLoqVDhKgpiN924inxo=
-github.com/aws/aws-sdk-go v1.31.12/go.mod h1:5zCpMtNQVjRREroY7sYe8lOMRSxkhG6MZveU8YkpAk0=
 github.com/aws/aws-sdk-go v1.37.1/go.mod h1:hcU610XS61/+aQV88ixoOzUoG7v3b31pl2zKMmprdro=
 github.com/aws/aws-sdk-go-v2 v0.18.0/go.mod h1:JWVYvqSMppoMJC0x5wdwiImzgXTI9FuZwxzkQq9wy+g=
 github.com/benbjohnson/clock v1.1.0 h1:Q92kusRqC1XV2MjkWETPvjJVqKetz1OzxZB7mHJLju8=
@@ -406,7 +403,6 @@ github.com/go-openapi/swag v0.19.5/go.mod h1:POnQmlKehdgb5mhVOsnJFsivZCEZ/vjK9gh
 github.com/go-openapi/swag v0.19.15 h1:D2NRCBzS9/pEY3gP9Nl8aDqGUcPFrwG2p+CNFrLyrCM=
 github.com/go-openapi/swag v0.19.15/go.mod h1:QYRuS/SOXUCsnplDa677K7+DxSOj6IPNl/eQntq43wQ=
 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/go.mod h1:v0f6uXyyMGvRgIKkXu+yp6POWl0qKG85gN/melR3HDY=
 github.com/gobuffalo/flect v0.2.3/go.mod h1:vmkQwuZYhN5Pc4ljYQZzP+1sq+NEkK+lh20jmEmX3jc=
 github.com/godbus/dbus v0.0.0-20151105175453-c7fdd8b5cd55/go.mod h1:/YcGZj5zSblfDWMMoOzV4fas9FZnQYTkDnsGvmh2Grw=
@@ -546,7 +542,6 @@ github.com/grpc-ecosystem/go-grpc-prometheus v1.2.0/go.mod h1:8NvIoxWQoOIhqOTXgf
 github.com/grpc-ecosystem/grpc-gateway v1.9.0/go.mod h1:vNeuVxBJEsws4ogUvrchl83t/GYV9WGTSLVdBhOQFDY=
 github.com/grpc-ecosystem/grpc-gateway v1.9.5/go.mod h1:vNeuVxBJEsws4ogUvrchl83t/GYV9WGTSLVdBhOQFDY=
 github.com/grpc-ecosystem/grpc-gateway v1.14.6/go.mod h1:zdiPV4Yse/1gnckTHtghG4GkDEdKCRJduHpTxT3/jcw=
-github.com/grpc-ecosystem/grpc-gateway v1.14.8/go.mod h1:NZE8t6vs6TnwLL/ITkaK8W3ecMLGAbh2jXTclvpiwYo=
 github.com/grpc-ecosystem/grpc-gateway v1.16.0 h1:gmcG1KaJ57LophUzW0Hy8NmPhnMZb4M0+kPpLofRdBo=
 github.com/grpc-ecosystem/grpc-gateway v1.16.0/go.mod h1:BDjrQk3hbvj6Nolgz8mAMFbcEtjT1g+wF4CSlocrBnw=
 github.com/hashicorp/consul/api v1.1.0/go.mod h1:VmuI/Lkw1nC05EYQWNKwWGbkg+FbDBtguAZLlVdkD9Q=
@@ -602,7 +597,6 @@ github.com/jessevdk/go-flags v1.4.0/go.mod h1:4FA24M0QyGHXBuZZK/XkWh8h0e1EYbRYJS
 github.com/jmespath/go-jmespath v0.0.0-20160202185014-0b12d6b521d8/go.mod h1:Nht3zPeWKUH0NzdCt2Blrr5ys8VGpn0CEB0cQHVjt7k=
 github.com/jmespath/go-jmespath v0.0.0-20160803190731-bd40a432e4c7/go.mod h1:Nht3zPeWKUH0NzdCt2Blrr5ys8VGpn0CEB0cQHVjt7k=
 github.com/jmespath/go-jmespath v0.0.0-20180206201540-c2b33e8439af/go.mod h1:Nht3zPeWKUH0NzdCt2Blrr5ys8VGpn0CEB0cQHVjt7k=
-github.com/jmespath/go-jmespath v0.3.0/go.mod h1:9QtRXoHjLGCJ5IBSaohpXITPlowMeeYCZ7fLUTSywik=
 github.com/jmespath/go-jmespath v0.4.0/go.mod h1:T8mJZnbsbmF+m6zOOFylbeCJqk5+pHWvzYPziyZiYoo=
 github.com/jmespath/go-jmespath/internal/testify v1.5.1/go.mod h1:L3OGu8Wl2/fWfCI6z80xFu9LTZmf1ZRjMHUOPmWr69U=
 github.com/jonboulle/clockwork v0.1.0/go.mod h1:Ii8DK3G1RaLaWxj9trq07+26W01tbo22gdxWY5EU2bo=
@@ -1011,7 +1005,6 @@ go.uber.org/atomic v1.3.2/go.mod h1:gD2HeocX3+yG+ygLZcrzQJaqmWj9AIm7n08wl/qW/PE=
 go.uber.org/atomic v1.4.0/go.mod h1:gD2HeocX3+yG+ygLZcrzQJaqmWj9AIm7n08wl/qW/PE=
 go.uber.org/atomic v1.5.0/go.mod h1:sABNBOSYdrvTF6hTgEIbc7YasKWGhgEQZyfxyTvoXHQ=
 go.uber.org/atomic v1.7.0/go.mod h1:fEN4uk6kAWBTFdckzkM89CLk9XfWZrxpCo0nPH17wJc=
-go.uber.org/atomic v1.8.0/go.mod h1:fEN4uk6kAWBTFdckzkM89CLk9XfWZrxpCo0nPH17wJc=
 go.uber.org/atomic v1.9.0 h1:ECmE8Bn/WFTYwEW/bpKD3M8VtR/zQVbavAoalC1PYyE=
 go.uber.org/atomic v1.9.0/go.mod h1:fEN4uk6kAWBTFdckzkM89CLk9XfWZrxpCo0nPH17wJc=
 go.uber.org/automaxprocs v1.4.0/go.mod h1:/mTEdr7LvHhs0v7mjdxDreTz1OG5zdZGqgOnhWiR/+Q=
@@ -1142,7 +1135,6 @@ golang.org/x/net v0.0.0-20210316092652-d523dce5a7f4/go.mod h1:RBQZq4jEuRlivfhVLd
 golang.org/x/net v0.0.0-20210405180319-a5a99cb37ef4/go.mod h1:p54w0d4576C0XHj96bSt6lcn1PtDYWL6XObtHCRCNQM=
 golang.org/x/net v0.0.0-20210503060351-7fd8e65b6420/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
 golang.org/x/net v0.0.0-20210525063256-abc453219eb5/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
-golang.org/x/net v0.0.0-20210614182718-04defd469f4e/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
 golang.org/x/net v0.0.0-20210726213435-c6fcb2dbf985 h1:4CSI6oo7cOjJKajidEljs9h+uP0rRZBPPPhcCbj5mw8=
 golang.org/x/net v0.0.0-20210726213435-c6fcb2dbf985/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
 golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
@@ -1309,7 +1301,6 @@ golang.org/x/tools v0.0.0-20190628153133-6cdbf07be9d0/go.mod h1:/rFqwRUd4F7ZHNgw
 golang.org/x/tools v0.0.0-20190816200558-6889da9d5479/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools v0.0.0-20190907020128-2ca718005c18/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools v0.0.0-20190911174233-4f2ddba30aff/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
-golang.org/x/tools v0.0.0-20191010075000-0337d82405ff/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools v0.0.0-20191012152004-8de300cfc20a/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 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=
@@ -1375,7 +1366,6 @@ google.golang.org/api v0.4.0/go.mod h1:8k5glujaEP+g9n7WNsDg8QP6cUVNI86fCNMcbazEt
 google.golang.org/api v0.7.0/go.mod h1:WtwebWUNSVBH/HAw79HIFXZNqEvBhG+Ra+ax0hx3E3M=
 google.golang.org/api v0.8.0/go.mod h1:o4eAsZoiT+ibD93RtjEohWalFOjRDx6CVaqeizhEnKg=
 google.golang.org/api v0.9.0/go.mod h1:o4eAsZoiT+ibD93RtjEohWalFOjRDx6CVaqeizhEnKg=
-google.golang.org/api v0.10.0/go.mod h1:o4eAsZoiT+ibD93RtjEohWalFOjRDx6CVaqeizhEnKg=
 google.golang.org/api v0.13.0/go.mod h1:iLdEw5Ide6rF15KTC1Kkl0iskquN2gFfn9o9XIsbkAI=
 google.golang.org/api v0.14.0/go.mod h1:iLdEw5Ide6rF15KTC1Kkl0iskquN2gFfn9o9XIsbkAI=
 google.golang.org/api v0.15.0/go.mod h1:iLdEw5Ide6rF15KTC1Kkl0iskquN2gFfn9o9XIsbkAI=
@@ -1406,7 +1396,6 @@ google.golang.org/appengine v1.2.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7
 google.golang.org/appengine v1.4.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
 google.golang.org/appengine v1.5.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
 google.golang.org/appengine v1.6.1/go.mod h1:i06prIuMbXzDqacNJfV5OdTW448YApPu5ww/cMBSeb0=
-google.golang.org/appengine v1.6.2/go.mod h1:i06prIuMbXzDqacNJfV5OdTW448YApPu5ww/cMBSeb0=
 google.golang.org/appengine v1.6.5/go.mod h1:8WjMMxjGQR8xUklV/ARdw2HLXBOI7O7uCIDZVag1xfc=
 google.golang.org/appengine v1.6.6/go.mod h1:8WjMMxjGQR8xUklV/ARdw2HLXBOI7O7uCIDZVag1xfc=
 google.golang.org/appengine v1.6.7 h1:FZR1q0exgwxzPzp/aF+VccGrSfxfPpkBqjIIEq3ru6c=
@@ -1631,23 +1620,19 @@ k8s.io/utils v0.0.0-20200729134348-d5654de09c73/go.mod h1:jPW/WVKK9YHAvNhRxK0md/
 k8s.io/utils v0.0.0-20201110183641-67b214c5f920/go.mod h1:jPW/WVKK9YHAvNhRxK0md/EJ228hCsBRufyofKtW8HA=
 k8s.io/utils v0.0.0-20210111153108-fddb29f9d009 h1:0T5IaWHO3sJTEmCP6mUlBvMukxPKUQWqiI/YuiBNMiQ=
 k8s.io/utils v0.0.0-20210111153108-fddb29f9d009/go.mod h1:jPW/WVKK9YHAvNhRxK0md/EJ228hCsBRufyofKtW8HA=
-knative.dev/caching v0.0.0-20210802062443-6947bb32bc1e/go.mod h1:cda8/bsmlqRKgHdsFWKjEl56Bw/2nNxmHnoJ14c7WDo=
+knative.dev/caching v0.0.0-20210803185815-4e553d2275a0/go.mod h1:Vs+HND39+KKaIQp9M3m3Jmt4YtznpitDQ3n53gxbDYQ=
-knative.dev/eventing v0.24.1-0.20210803173815-5c7b55336efd h1:ygV2agIpofSLAp34xT5MDYFBhoEHUVCIO8O2BtdH35g=
+knative.dev/eventing v0.24.1-0.20210809153712-0c41e6d42127 h1:8G2zo+pnXhENIuvShB95GXF8YvXzQzf9PpZ1jDVsJ/A=
-knative.dev/eventing v0.24.1-0.20210803173815-5c7b55336efd/go.mod h1:mYN9AeU95zB9QT9ATmYiq0i7k41u69xD0jW1udHdPrc=
+knative.dev/eventing v0.24.1-0.20210809153712-0c41e6d42127/go.mod h1:8jIsrnSONPgv+m63OTzpwZQJiQASYl77C3llCyYlBMU=
 knative.dev/hack v0.0.0-20210622141627-e28525d8d260 h1:f2eMtOubAOc/Q7JlvFPDKXiPlJVK+VpX2Cot8hRzCgQ=
 knative.dev/hack v0.0.0-20210622141627-e28525d8d260/go.mod h1:PHt8x8yX5Z9pPquBEfIj0X66f8iWkWfR0S/sarACJrI=
 knative.dev/hack/schema v0.0.0-20210622141627-e28525d8d260/go.mod h1:ffjwmdcrH5vN3mPhO8RrF2KfNnbHeCE2C60A+2cv3U0=
-knative.dev/networking v0.0.0-20210802043343-0f2f50944c03/go.mod h1:slkQfBEF/qlCfVlifxa6G25XBa0MxDfLcRLxwnCtv0c=
 knative.dev/networking v0.0.0-20210803181815-acdfd41c575c h1:7G6TQr7ZyIHx35Dn5zuNKUDhlly3KkFxgrKLXeKmjj8=
 knative.dev/networking v0.0.0-20210803181815-acdfd41c575c/go.mod h1:UA9m1M3rGssy63gVwjSh7CYoWTKZNO8cnY9QsIu7tyo=
-knative.dev/pkg v0.0.0-20210713175550-7d1b0f19ef71/go.mod h1:d06VsGUT2grnlhA8GcUjsoePok8P859AYcIqWISMGtY=
-knative.dev/pkg v0.0.0-20210731072840-64ab22bbaab9/go.mod h1:NYZRIPU+Pv39VfbZV1BtMIe4kCavNle1udsPrvOLm+Y=
-knative.dev/pkg v0.0.0-20210803032247-552bbc106170/go.mod h1:NYZRIPU+Pv39VfbZV1BtMIe4kCavNle1udsPrvOLm+Y=
 knative.dev/pkg v0.0.0-20210803160015-21eb4c167cc5 h1:jpOTmAXg1oLS8u5HPBrFP1XsOSFCQIvlTRxP8TDGg2E=
 knative.dev/pkg v0.0.0-20210803160015-21eb4c167cc5/go.mod h1:RPk5txNA3apR9X40D4MpUOP9/VqOG8CrtABWfOwGVS4=
-knative.dev/reconciler-test v0.0.0-20210714231231-91e5b206e1d5/go.mod h1:Zp2WHfJuh6+rOpOAq78My82drT4Bxjm/K4etmKcA7ko=
+knative.dev/reconciler-test v0.0.0-20210803183715-b61cc77c06f6/go.mod h1:+Kovy+G5zXZNcuO/uB+zfo37vFKZzsLIlWezt/nKMz0=
-knative.dev/serving v0.24.1-0.20210803152115-ac8d05d5cebd h1:YCRAI7VGEJJQELb1foB0zTmxXrh6jA+ohzumTQKixyI=
+knative.dev/serving v0.24.1-0.20210806230708-5ad15dff1c94 h1:++x4kIx33goJiX4BycT+V9+pNRgK9kP5b0g8GSB1SH4=
-knative.dev/serving v0.24.1-0.20210803152115-ac8d05d5cebd/go.mod h1:PIiHlCNPwKSh2JgDfa+A9qwA/bFo7WeAT6bieWQGAPM=
+knative.dev/serving v0.24.1-0.20210806230708-5ad15dff1c94/go.mod h1:24E4fVyViFnz8aAaafzdrYKB7CAsQr4FMU7QXoIE6CI=
 pgregory.net/rapid v0.3.3/go.mod h1:UYpPVyjFHzYBGHIxLFoupi8vwk6rXNzRY9OMvVxFIOU=
 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=

vendor/knative.dev/serving/pkg/apis/autoscaling/annotation_validation.go

@@ -158,8 +158,9 @@ func validateLastPodRetention(annotations map[string]string) *apis.FieldError {
 
 func validateWindow(annotations map[string]string) *apis.FieldError {
 	if w, ok := annotations[WindowAnnotationKey]; ok {
-		if annotations[ClassAnnotationKey] == HPA && annotations[MetricAnnotationKey] == CPU {
+		if annotations[ClassAnnotationKey] == HPA && (annotations[MetricAnnotationKey] == CPU || annotations[MetricAnnotationKey] == Memory) {
-			return apis.ErrInvalidKeyName(WindowAnnotationKey, apis.CurrentField, fmt.Sprintf("%s for %s %s", HPA, MetricAnnotationKey, CPU))
+			return apis.ErrInvalidKeyName(WindowAnnotationKey, apis.CurrentField, fmt.Sprintf("%s for %s %s", HPA,
+				MetricAnnotationKey, annotations[MetricAnnotationKey]))
 		}
 		switch d, err := time.ParseDuration(w); {
 		case err != nil:
@@ -225,7 +226,7 @@ func validateMetric(annotations map[string]string) *apis.FieldError {
 			}
 		case HPA:
 			switch metric {
-			case CPU:
+			case CPU, Memory:
 				return nil
 			}
 		default:

vendor/knative.dev/serving/pkg/apis/autoscaling/register.go

@@ -62,6 +62,8 @@ const (
 	Concurrency = "concurrency"
 	// CPU is the amount of the requested cpu actually being consumed by the Pod.
 	CPU = "cpu"
+	// Memory is the amount of the requested memory actually being consumed by the Pod.
+	Memory = "memory"
 	// RPS is the requests per second reaching the Pod.
 	RPS = "rps"
 
@@ -69,6 +71,9 @@ const (
 	// PodAutoscaler should attempt to maintain. For example,
 	//   autoscaling.knative.dev/metric: cpu
 	//   autoscaling.knative.dev/target: "75"   # target 75% cpu utilization
+	// Or
+	//   autoscaling.knative.dev/metric: memory
+	//   autoscaling.knative.dev/target: "100"   # target 100MiB memory usage
 	TargetAnnotationKey = GroupName + "/target"
 	// TargetMin is the minimum allowable target.
 	// This can be less than 1 due to the fact that with small container

vendor/modules.txt

@@ -686,7 +686,7 @@ k8s.io/utils/buffer
 k8s.io/utils/integer
 k8s.io/utils/pointer
 k8s.io/utils/trace
-# knative.dev/eventing v0.24.1-0.20210803173815-5c7b55336efd
+# knative.dev/eventing v0.24.1-0.20210809153712-0c41e6d42127
 ## explicit
 knative.dev/eventing/pkg/apis/config
 knative.dev/eventing/pkg/apis/duck
@@ -773,7 +773,7 @@ knative.dev/pkg/tracing/propagation
 knative.dev/pkg/tracing/propagation/tracecontextb3
 knative.dev/pkg/tracker
 knative.dev/pkg/unstructured
-# knative.dev/serving v0.24.1-0.20210803152115-ac8d05d5cebd
+# knative.dev/serving v0.24.1-0.20210806230708-5ad15dff1c94
 ## explicit
 knative.dev/serving/pkg/apis/autoscaling
 knative.dev/serving/pkg/apis/autoscaling/v1alpha1