Error in WebHook - expected webhook response of admission.k8s.io/v1, Kind=AdmissionReview, got /, Kind=

[dev-chirag]

Hi,

I know there isnt a lot of activity in this project. Still trying my luck.

For any pod that I am trying to create (with or without the annotation), I am getting this exception:

Warning  FailedCreate  49s (x17 over 6m16s)  replicaset-controller  Error creating: Internal error occurred: failed calling webhook "sidecarinjector.sfdc.internal": received invalid webhook response: expected webhook response of admission.k8s.io/v1, Kind=AdmissionReview, got /, Kind=

Anything I am missing in the configuration?

[jasondiazg]

I am not pretty sure about it, but I think it is for the Kubernetes version, the code should be modified to us an upgraded version.

[jasondiazg]

I checked the code and it seems like it was upgraded some time ago, however, I built the docker image by my own and it is generating this issue and I don't know what is wrong:

http: panic serving 10.244.23.26:38206: runtime error: invalid memory address or nil pointer dereference
goroutine 38 [running]:
net/http.(*conn).serve.func1()
	/usr/local/go/src/net/http/server.go:1868 +0xb9
panic({0xc965e0?, 0x148bd50?})
	/usr/local/go/src/runtime/panic.go:920 +0x270
github.com/salesforce/generic-sidecar-injector/pkg/injectionwebhook.(*WebhookServer).mutate(0xc0001e25c0, 0xc0004bce70)
	/sidecarinjector/pkg/injectionwebhook/webhook.go:144 +0x471
github.com/salesforce/generic-sidecar-injector/pkg/injectionwebhook.(*WebhookServer).serve(0x40dd05?, {0x7f3f6308b140, 0xc00038e2d0}, 0xc00022a000)
	/sidecarinjector/pkg/injectionwebhook/webhook.go:215 +0x32e
net/http.HandlerFunc.ServeHTTP(0xecfb00?, {0x7f3f6308b140?, 0xc00038e2d0?}, 0xc0004bce10?)
	/usr/local/go/src/net/http/server.go:2136 +0x29
github.com/salesforce/generic-sidecar-injector/pkg/metrics.GetHTTPMetricHandler.(*PromHTTPHandler).withInFlight.InstrumentHandlerInFlight.func1({0x7f3f6308b140, 0xc00038e2d0}, 0x7f3f6308b100?)
	/sidecarinjector/vendor/github.com/prometheus/client_golang/prometheus/promhttp/instrument_server.go:60 +0xcb
net/http.HandlerFunc.ServeHTTP(0x7f3f6308b140?, {0x7f3f6308b140?, 0xc00038e2d0?}, 0xc000080400?)
	/usr/local/go/src/net/http/server.go:2136 +0x29
github.com/prometheus/client_golang/prometheus/promhttp.InstrumentHandlerCounter.func1({0x7f3f6308b140?, 0xc00038e280?}, 0xc00022a000)
	/sidecarinjector/vendor/github.com/prometheus/client_golang/prometheus/promhttp/instrument_server.go:147 +0xb6
net/http.HandlerFunc.ServeHTTP(0x7f3f6308b140?, {0x7f3f6308b140?, 0xc00038e280?}, 0xd41360?)
	/usr/local/go/src/net/http/server.go:2136 +0x29
github.com/prometheus/client_golang/prometheus/promhttp.InstrumentHandlerDuration.func1({0x7f3f6308b140, 0xc00038e230}, 0xc00022a000)
	/sidecarinjector/vendor/github.com/prometheus/client_golang/prometheus/promhttp/instrument_server.go:97 +0xf9
net/http.HandlerFunc.ServeHTTP(0xed6988?, {0x7f3f6308b140?, 0xc00038e230?}, 0x7?)
	/usr/local/go/src/net/http/server.go:2136 +0x29
github.com/prometheus/client_golang/prometheus/promhttp.InstrumentHandlerResponseSize.func1({0xed6988?, 0xc00021a000?}, 0xc00022a000)
	/sidecarinjector/vendor/github.com/prometheus/client_golang/prometheus/promhttp/instrument_server.go:296 +0xca
net/http.HandlerFunc.ServeHTTP(0xc0004d4050?, {0xed6988?, 0xc00021a000?}, 0x7da0e5?)
	/usr/local/go/src/net/http/server.go:2136 +0x29
net/http.HandlerFunc.ServeHTTP(0x10?, {0xed6988?, 0xc00021a000?}, 0xc0003b612c?)
	/usr/local/go/src/net/http/server.go:2136 +0x29
net/http.(*ServeMux).ServeHTTP(0x4105a5?, {0xed6988, 0xc00021a000}, 0xc00022a000)
	/usr/local/go/src/net/http/server.go:2514 +0x142
net/http.serverHandler.ServeHTTP({0xed20c8?}, {0xed6988?, 0xc00021a000?}, 0x6?)
	/usr/local/go/src/net/http/server.go:2938 +0x8e
net/http.(*conn).serve(0xc0004b8000, {0xed8948, 0xc00023e600})
	/usr/local/go/src/net/http/server.go:2009 +0x5f4
created by net/http.(*Server).Serve in goroutine 49
	/usr/local/go/src/net/http/server.go:3086 +0x5cb