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@zalando-robot zalando-robot released this 08 Jul 10:25
v0.27.25
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Changes

zone aware routing: latency by zone + rps by zone (#4111)

This PR introduces two changes:

  1. When I operate skipper-ingress controller across multiple
    availability zones, I want backend request latency labeled by the
    destination endpoint's zone, So that I can plot per-zone latency and RPS
    by zone

RPS by zone:
image

Latency by zone:
image

  1. When I run skipper-ingress that consume routes from RouteSRV, I want
    each backend endpoint's availability zone to survive the eskip wire
    format, So that per-zone backend latency can be plotted when RouteSRV is
    used, the same as in the in-process kubernetes dataclient mode - ref:
    #4103

Result: In the test cluster, there were 2 instances of skipper-ingress
one set to Zone-A, the other to Zone-B

route-dump of skipper-ingress in zone A

kube_rg__skipper_loadtest_target__loadtest_target__all__0_0: Host(/^(skipper-loadtest[.]pg9-test[.]zalan[.]do[.]?(:[0-9]+)?)$/) && PathSubtree("/")
  -> disableAccessLog(2, 3, 404, 429)
  -> fifo(2000, 20, "1s")
  -> disableAccessLog()
  -> oauthTokeninfoValidate("{optOutAnnotations: [iam.zalando.org/public], optOutHosts: [\"^.*[.]ingress[.]cluster[.]local\"], unauthorizedResponse: \"Authentication required, see https://cloud.docs.zalando.net/howtos/authenticate-requests/#default-authentication\\n\"}")
  -> stateBagToTag("auth-user", "client.uid")
  -> <powerOfRandomNChoices, "http://[2a05:d024:90:1103:6d8f::4]:9090?zone=eu-central-1a", "http://[2a05:d024:90:1103:931f::b]:9090?zone=eu-central-1a", "http://[2a05:d024:90:1103:931f::c]:9090?zone=eu-central-1a">;

route-dump of skipper-ingress in zone B

kube_rg__skipper_loadtest_target__loadtest_target__all__0_0: Host(/^(skipper-loadtest[.]pg9-test[.]zalan[.]do[.]?(:[0-9]+)?)$/) && PathSubtree("/")
  -> disableAccessLog(2, 3, 404, 429)
  -> fifo(2000, 20, "1s")
  -> disableAccessLog()
  -> oauthTokeninfoValidate("{optOutAnnotations: [iam.zalando.org/public], optOutHosts: [\"^.*[.]ingress[.]cluster[.]local\"], unauthorizedResponse: \"Authentication required, see https://cloud.docs.zalando.net/howtos/authenticate-requests/#default-authentication\\n\"}")
  -> stateBagToTag("auth-user", "client.uid")
  -> <powerOfRandomNChoices, "http://[2a05:d024:90:1104:99f6::20]:9090?zone=eu-central-1b", "http://[2a05:d024:90:1104:99f6::24]:9090?zone=eu-central-1b", "http://[2a05:d024:90:1104:99f6::c]:9090?zone=eu-central-1b">;

Multiarch Docker image

Multiarch Docker image is available in GitHub's docker registry:

docker run -it ghcr.io/zalando/skipper:v0.27.25 skipper --help
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