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cert-manager check api: request canceled while waiting for connection (Client.Timeout exceeded while awaiting headers) #4440

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busch opened this issue Sep 8, 2021 · 9 comments
Closed

cert-manager check api: request canceled while waiting for connection (Client.Timeout exceeded while awaiting headers) #4440

busch opened this issue Sep 8, 2021 · 9 comments
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kind/bug Categorizes issue or PR as related to a bug. lifecycle/rotten Denotes an issue or PR that has aged beyond stale and will be auto-closed.

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@busch
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busch commented Sep 8, 2021 •
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Got an issue here while installing cert-manager 1.5.3 on (self-installed) k8s 1.22.1:

cert-manager is installed using
kubectl apply -f https://github.com/jetstack/cert-manager/releases/download/v1.5.3/cert-manager.yaml

The pods seem okay:

kubectl get pods --namespace cert-manager -o wide
NAME                                      READY   STATUS    RESTARTS   AGE   IP          NODE            NOMINATED NODE   READINESS GATES
cert-manager-848f547974-qzl55             1/1     Running   0          80s   10.32.0.8   k8s-worker-01   <none>           <none>
cert-manager-cainjector-54f4cc6b5-mnzkv   1/1     Running   0          80s   10.32.0.6   k8s-worker-01   <none>           <none>
cert-manager-webhook-7c9588c76-7npxj      1/1     Running   0          80s   10.44.0.6   k8s-worker-02   <none>           <none>

Verifying the cert-manager installation fails:

kubectl cert-manager check api
Not ready: Internal error occurred: conversion webhook for cert-manager.io/v1alpha2, Kind=Certificate failed: Post "https://cert-manager-webhook.cert-manager.svc:443/convert?timeout=30s": net/http: request canceled while waiting for connection (Client.Timeout exceeded while awaiting headers)

What exactly fails here? The k8s api-server connecting to the webhook pod?

Pod logs:

k logs -n cert-manager cert-manager-848f547974-qzl55
I0908 13:55:44.353782       1 start.go:75] cert-manager "msg"="starting controller"  "git-commit"="b26bd256f124d480fcb198e1464854f41b0d0d2c" "version"="v1.5.3"
W0908 13:55:44.353974       1 client_config.go:615] Neither --kubeconfig nor --master was specified.  Using the inClusterConfig.  This might not work.
I0908 13:55:44.355215       1 controller.go:268] cert-manager/controller/build-context "msg"="configured acme dns01 nameservers" "nameservers"=["10.0.0.10:53"]
I0908 13:55:44.355770       1 controller.go:85] cert-manager/controller "msg"="enabled controllers: [certificaterequests-approver certificaterequests-issuer-acme certificaterequests-issuer-ca certificaterequests-issuer-selfsigned certificaterequests-issuer-vault certificaterequests-issuer-venafi certificates-issuing certificates-key-manager certificates-metrics certificates-readiness certificates-request-manager certificates-revision-manager certificates-trigger challenges clusterissuers ingress-shim issuers orders]"
I0908 13:55:44.356038       1 controller.go:115] cert-manager/controller "msg"="starting leader election"
I0908 13:55:44.356159       1 controller.go:105] cert-manager/controller "msg"="starting metrics server"  "address"={"IP":"::","Port":9402,"Zone":""}
I0908 13:55:44.356773       1 leaderelection.go:243] attempting to acquire leader lease kube-system/cert-manager-controller...
I0908 13:57:02.749470       1 leaderelection.go:253] successfully acquired lease kube-system/cert-manager-controller
I0908 13:57:02.750071       1 controller.go:186] cert-manager/controller "msg"="starting controller" "controller"="certificaterequests-issuer-selfsigned"
I0908 13:57:02.750108       1 controller.go:186] cert-manager/controller "msg"="starting controller" "controller"="certificaterequests-issuer-vault"
I0908 13:57:02.750120       1 controller.go:186] cert-manager/controller "msg"="starting controller" "controller"="certificates-issuing"
I0908 13:57:02.750278       1 controller.go:186] cert-manager/controller "msg"="starting controller" "controller"="certificates-key-manager"
I0908 13:57:02.750305       1 controller.go:186] cert-manager/controller "msg"="starting controller" "controller"="certificates-metrics"
I0908 13:57:02.750323       1 controller.go:163] cert-manager/controller "msg"="not starting controller as it's disabled" "controller"="certificatesigningrequests-issuer-venafi"
I0908 13:57:02.750364       1 controller.go:163] cert-manager/controller "msg"="not starting controller as it's disabled" "controller"="gateway-shim"
I0908 13:57:02.750395       1 controller.go:186] cert-manager/controller "msg"="starting controller" "controller"="certificates-trigger"
I0908 13:57:02.755189       1 controller.go:163] cert-manager/controller "msg"="not starting controller as it's disabled" "controller"="certificatesigningrequests-issuer-vault"
I0908 13:57:02.755404       1 controller.go:186] cert-manager/controller "msg"="starting controller" "controller"="ingress-shim"
I0908 13:57:02.755438       1 controller.go:186] cert-manager/controller "msg"="starting controller" "controller"="certificaterequests-approver"
I0908 13:57:02.755461       1 controller.go:186] cert-manager/controller "msg"="starting controller" "controller"="certificaterequests-issuer-ca"
I0908 13:57:02.755476       1 controller.go:186] cert-manager/controller "msg"="starting controller" "controller"="certificates-readiness"
I0908 13:57:02.755487       1 controller.go:186] cert-manager/controller "msg"="starting controller" "controller"="certificaterequests-issuer-acme"
I0908 13:57:02.755495       1 controller.go:186] cert-manager/controller "msg"="starting controller" "controller"="issuers"
I0908 13:57:02.755519       1 controller.go:186] cert-manager/controller "msg"="starting controller" "controller"="orders"
I0908 13:57:02.755599       1 controller.go:186] cert-manager/controller "msg"="starting controller" "controller"="certificaterequests-issuer-venafi"
I0908 13:57:02.755621       1 controller.go:186] cert-manager/controller "msg"="starting controller" "controller"="certificates-request-manager" 
I0908 13:57:02.755652       1 controller.go:163] cert-manager/controller "msg"="not starting controller as it's disabled" "controller"="certificatesigningrequests-issuer-acme"
I0908 13:57:02.755661       1 controller.go:163] cert-manager/controller "msg"="not starting controller as it's disabled" "controller"="certificatesigningrequests-issuer-ca"
I0908 13:57:02.756423       1 controller.go:186] cert-manager/controller "msg"="starting controller" "controller"="certificates-revision-manager"
I0908 13:57:02.856844       1 controller.go:163] cert-manager/controller "msg"="not starting controller as it's disabled" "controller"="certificatesigningrequests-issuer-selfsigned"
I0908 13:57:02.856938       1 controller.go:186] cert-manager/controller "msg"="starting controller" "controller"="clusterissuers"
I0908 13:57:02.856968       1 controller.go:186] cert-manager/controller "msg"="starting controller" "controller"="challenges"

k logs -n cert-manager cert-manager-cainjector-54f4cc6b5-mnzkv
I0908 13:55:44.314643       1 start.go:107] "starting" version="v1.5.3" revision="b26bd256f124d480fcb198e1464854f41b0d0d2c"
I0908 13:55:45.281494       1 leaderelection.go:243] attempting to acquire leader lease kube-system/cert-manager-cainjector-leader-election...
I0908 13:56:02.342926       1 leaderelection.go:253] successfully acquired lease kube-system/cert-manager-cainjector-leader-election
I0908 13:56:02.343821       1 recorder.go:104] cert-manager/controller-runtime/manager/events "msg"="Normal"  "message"="cert-manager-cainjector-54f4cc6b5-mnzkv_fe973038-9ac7-456f-951d-398da5127285 became leader" "object"={"kind":"ConfigMap","namespace":"kube-system","name":"cert-manager-cainjector-leader-election","uid":"f6d1fb99-62bc-4282-aa0d-2a82e7f161e5","apiVersion":"v1","resourceVersion":"1159463"} "reason"="LeaderElection"
I0908 13:56:02.343880       1 recorder.go:104] cert-manager/controller-runtime/manager/events "msg"="Normal"  "message"="cert-manager-cainjector-54f4cc6b5-mnzkv_fe973038-9ac7-456f-951d-398da5127285 became leader" "object"={"kind":"Lease","namespace":"kube-system","name":"cert-manager-cainjector-leader-election","uid":"d8ab681a-0e7e-415b-af44-6c1ae3e2f3d8","apiVersion":"coordination.k8s.io/v1","resourceVersion":"1159464"} "reason"="LeaderElection"
I0908 13:56:02.544848       1 controller.go:165] cert-manager/secret/customresourcedefinition/controller/controller-for-secret-customresourcedefinition "msg"="Starting EventSource"  "source"={}
I0908 13:56:02.545006       1 controller.go:165] cert-manager/secret/customresourcedefinition/controller/controller-for-secret-customresourcedefinition "msg"="Starting EventSource"  "source"={}
I0908 13:56:02.545071       1 controller.go:173] cert-manager/secret/customresourcedefinition/controller/controller-for-secret-customresourcedefinition "msg"="Starting Controller"
I0908 13:56:02.545299       1 controller.go:165] cert-manager/secret/mutatingwebhookconfiguration/controller/controller-for-secret-mutatingwebhookconfiguration "msg"="Starting EventSource"  "source"={}  
I0908 13:56:02.545372       1 controller.go:165] cert-manager/secret/mutatingwebhookconfiguration/controller/controller-for-secret-mutatingwebhookconfiguration "msg"="Starting EventSource"  "source"={}  
I0908 13:56:02.545429       1 controller.go:173] cert-manager/secret/mutatingwebhookconfiguration/controller/controller-for-secret-mutatingwebhookconfiguration "msg"="Starting Controller"
I0908 13:56:02.545550       1 controller.go:165] cert-manager/secret/validatingwebhookconfiguration/controller/controller-for-secret-validatingwebhookconfiguration "msg"="Starting EventSource"  "source"={}
I0908 13:56:02.545607       1 controller.go:165] cert-manager/secret/validatingwebhookconfiguration/controller/controller-for-secret-validatingwebhookconfiguration "msg"="Starting EventSource"  "source"={}
I0908 13:56:02.545662       1 controller.go:173] cert-manager/secret/validatingwebhookconfiguration/controller/controller-for-secret-validatingwebhookconfiguration "msg"="Starting Controller"
I0908 13:56:02.545780       1 controller.go:165] cert-manager/secret/apiservice/controller/controller-for-secret-apiservice "msg"="Starting EventSource"  "source"={}
I0908 13:56:02.545834       1 controller.go:165] cert-manager/secret/apiservice/controller/controller-for-secret-apiservice "msg"="Starting EventSource"  "source"={}
I0908 13:56:02.545888       1 controller.go:173] cert-manager/secret/apiservice/controller/controller-for-secret-apiservice "msg"="Starting Controller"
I0908 13:56:02.546542       1 controller.go:165] cert-manager/certificate/customresourcedefinition/controller/controller-for-certificate-customresourcedefinition "msg"="Starting EventSource"  "source"={}I0908 13:56:02.546702       1 controller.go:165] cert-manager/certificate/customresourcedefinition/controller/controller-for-certificate-customresourcedefinition "msg"="Starting EventSource"  "source"={}I0908 13:56:02.546767       1 controller.go:165] cert-manager/certificate/customresourcedefinition/controller/controller-for-certificate-customresourcedefinition "msg"="Starting EventSource"  "source"={}I0908 13:56:02.546817       1 controller.go:173] cert-manager/certificate/customresourcedefinition/controller/controller-for-certificate-customresourcedefinition "msg"="Starting Controller"
I0908 13:56:02.547057       1 controller.go:165] cert-manager/certificate/mutatingwebhookconfiguration/controller/controller-for-certificate-mutatingwebhookconfiguration "msg"="Starting EventSource"  "source"={}
I0908 13:56:02.547162       1 controller.go:165] cert-manager/certificate/mutatingwebhookconfiguration/controller/controller-for-certificate-mutatingwebhookconfiguration "msg"="Starting EventSource"  "source"={}
I0908 13:56:02.547227       1 controller.go:165] cert-manager/certificate/mutatingwebhookconfiguration/controller/controller-for-certificate-mutatingwebhookconfiguration "msg"="Starting EventSource"  "source"={}
I0908 13:56:02.547280       1 controller.go:173] cert-manager/certificate/mutatingwebhookconfiguration/controller/controller-for-certificate-mutatingwebhookconfiguration "msg"="Starting Controller"      
I0908 13:56:02.547386       1 controller.go:165] cert-manager/certificate/validatingwebhookconfiguration/controller/controller-for-certificate-validatingwebhookconfiguration "msg"="Starting EventSource" 
 "source"={}
I0908 13:56:02.547444       1 controller.go:165] cert-manager/certificate/validatingwebhookconfiguration/controller/controller-for-certificate-validatingwebhookconfiguration "msg"="Starting EventSource" 
 "source"={}
I0908 13:56:02.547499       1 controller.go:165] cert-manager/certificate/validatingwebhookconfiguration/controller/controller-for-certificate-validatingwebhookconfiguration "msg"="Starting EventSource" 
 "source"={}
I0908 13:56:02.547549       1 controller.go:173] cert-manager/certificate/validatingwebhookconfiguration/controller/controller-for-certificate-validatingwebhookconfiguration "msg"="Starting Controller"  
I0908 13:56:02.547533       1 controller.go:165] cert-manager/certificate/apiservice/controller/controller-for-certificate-apiservice "msg"="Starting EventSource"  "source"={}
I0908 13:56:02.547693       1 controller.go:165] cert-manager/certificate/apiservice/controller/controller-for-certificate-apiservice "msg"="Starting EventSource"  "source"={}
I0908 13:56:02.547746       1 controller.go:165] cert-manager/certificate/apiservice/controller/controller-for-certificate-apiservice "msg"="Starting EventSource"  "source"={}
I0908 13:56:02.547794       1 controller.go:173] cert-manager/certificate/apiservice/controller/controller-for-certificate-apiservice "msg"="Starting Controller"
I0908 13:56:02.649509       1 controller.go:207] cert-manager/secret/customresourcedefinition/controller/controller-for-secret-customresourcedefinition "msg"="Starting workers"  "worker count"=1
I0908 13:56:02.659964       1 controller.go:207] cert-manager/secret/mutatingwebhookconfiguration/controller/controller-for-secret-mutatingwebhookconfiguration "msg"="Starting workers"  "worker count"=1 
I0908 13:56:02.660684       1 controller.go:207] cert-manager/secret/validatingwebhookconfiguration/controller/controller-for-secret-validatingwebhookconfiguration "msg"="Starting workers"  "worker count"=1
I0908 13:56:02.660705       1 controller.go:207] cert-manager/secret/apiservice/controller/controller-for-secret-apiservice "msg"="Starting workers"  "worker count"=1
I0908 13:56:02.689059       1 controller.go:178] cert-manager/secret/validatingwebhookconfiguration/generic-inject-reconciler "msg"="updated object" "resource_kind"="ValidatingWebhookConfiguration" "resource_name"="cert-manager-webhook" "resource_namespace"="" "resource_version"="v1"
I0908 13:56:02.689595       1 controller.go:178] cert-manager/secret/mutatingwebhookconfiguration/generic-inject-reconciler "msg"="updated object" "resource_kind"="MutatingWebhookConfiguration" "resource_name"="cert-manager-webhook" "resource_namespace"="" "resource_version"="v1"
I0908 13:56:02.721044       1 controller.go:178] cert-manager/secret/mutatingwebhookconfiguration/generic-inject-reconciler "msg"="updated object" "resource_kind"="MutatingWebhookConfiguration" "resource_name"="cert-manager-webhook" "resource_namespace"="" "resource_version"="v1"
I0908 13:56:02.723547       1 controller.go:178] cert-manager/secret/validatingwebhookconfiguration/generic-inject-reconciler "msg"="updated object" "resource_kind"="ValidatingWebhookConfiguration" "resource_name"="cert-manager-webhook" "resource_namespace"="" "resource_version"="v1"
I0908 13:56:02.744974       1 controller.go:178] cert-manager/secret/customresourcedefinition/generic-inject-reconciler "msg"="updated object" "resource_kind"="CustomResourceDefinition" "resource_name"="certificaterequests.cert-manager.io" "resource_namespace"="" "resource_version"="v1"
I0908 13:56:02.748451       1 controller.go:207] cert-manager/certificate/mutatingwebhookconfiguration/controller/controller-for-certificate-mutatingwebhookconfiguration "msg"="Starting workers"  "worker count"=1
I0908 13:56:02.748577       1 controller.go:207] cert-manager/certificate/customresourcedefinition/controller/controller-for-certificate-customresourcedefinition "msg"="Starting workers"  "worker count"=1
I0908 13:56:02.748679       1 controller.go:207] cert-manager/certificate/validatingwebhookconfiguration/controller/controller-for-certificate-validatingwebhookconfiguration "msg"="Starting workers"  "worker count"=1
I0908 13:56:02.749851       1 controller.go:207] cert-manager/certificate/apiservice/controller/controller-for-certificate-apiservice "msg"="Starting workers"  "worker count"=1
I0908 13:56:02.799939       1 controller.go:178] cert-manager/secret/customresourcedefinition/generic-inject-reconciler "msg"="updated object" "resource_kind"="CustomResourceDefinition" "resource_name"="certificates.cert-manager.io" "resource_namespace"="" "resource_version"="v1"
I0908 13:56:02.948866       1 controller.go:178] cert-manager/secret/customresourcedefinition/generic-inject-reconciler "msg"="updated object" "resource_kind"="CustomResourceDefinition" "resource_name"="challenges.acme.cert-manager.io" "resource_namespace"="" "resource_version"="v1"
I0908 13:56:03.118211       1 controller.go:178] cert-manager/secret/customresourcedefinition/generic-inject-reconciler "msg"="updated object" "resource_kind"="CustomResourceDefinition" "resource_name"="clusterissuers.cert-manager.io" "resource_namespace"="" "resource_version"="v1"
I0908 13:56:03.370341       1 controller.go:178] cert-manager/secret/customresourcedefinition/generic-inject-reconciler "msg"="updated object" "resource_kind"="CustomResourceDefinition" "resource_name"="issuers.cert-manager.io" "resource_namespace"="" "resource_version"="v1"
I0908 13:56:03.429927       1 controller.go:178] cert-manager/secret/customresourcedefinition/generic-inject-reconciler "msg"="updated object" "resource_kind"="CustomResourceDefinition" "resource_name"="orders.acme.cert-manager.io" "resource_namespace"="" "resource_version"="v1"
I0908 13:56:03.449196       1 controller.go:178] cert-manager/secret/customresourcedefinition/generic-inject-reconciler "msg"="updated object" "resource_kind"="CustomResourceDefinition" "resource_name"="certificaterequests.cert-manager.io" "resource_namespace"="" "resource_version"="v1"
I0908 13:56:03.485142       1 controller.go:178] cert-manager/secret/customresourcedefinition/generic-inject-reconciler "msg"="updated object" "resource_kind"="CustomResourceDefinition" "resource_name"="certificates.cert-manager.io" "resource_namespace"="" "resource_version"="v1"
I0908 13:56:03.589599       1 controller.go:178] cert-manager/secret/customresourcedefinition/generic-inject-reconciler "msg"="updated object" "resource_kind"="CustomResourceDefinition" "resource_name"="challenges.acme.cert-manager.io" "resource_namespace"="" "resource_version"="v1"
I0908 13:56:03.735966       1 controller.go:178] cert-manager/secret/customresourcedefinition/generic-inject-reconciler "msg"="updated object" "resource_kind"="CustomResourceDefinition" "resource_name"="clusterissuers.cert-manager.io" "resource_namespace"="" "resource_version"="v1" 
I0908 13:56:04.055146       1 controller.go:178] cert-manager/secret/customresourcedefinition/generic-inject-reconciler "msg"="updated object" "resource_kind"="CustomResourceDefinition" "resource_name"="issuers.cert-manager.io" "resource_namespace"="" "resource_version"="v1"
I0908 13:56:04.084750       1 controller.go:178] cert-manager/secret/customresourcedefinition/generic-inject-reconciler "msg"="updated object" "resource_kind"="CustomResourceDefinition" "resource_name"="orders.acme.cert-manager.io" "resource_namespace"="" "resource_version"="v1"

k logs -n cert-manager cert-manager-webhook-7c9588c76-7npxj   
W0908 13:55:44.249385       1 client_config.go:615] Neither --kubeconfig nor --master was specified.  Using the inClusterConfig.  This might not work.
W0908 13:55:44.250438       1 client_config.go:615] Neither --kubeconfig nor --master was specified.  Using the inClusterConfig.  This might not work.
I0908 13:55:44.250585       1 webhook.go:70] cert-manager/webhook "msg"="using dynamic certificate generating using CA stored in Secret resource"  "secret_name"="cert-manager-webhook-ca" "secret_namespace"="cert-manager"
I0908 13:55:44.250933       1 server.go:138] cert-manager/webhook "msg"="listening for insecure healthz connections"  "address"=":6080"
I0908 13:55:44.251011       1 server.go:169] cert-manager/webhook "msg"="listening for secure connections"  "address"=":10250"
I0908 13:55:44.251101       1 server.go:201] cert-manager/webhook "msg"="registered pprof handlers"
I0908 13:55:45.284810       1 dynamic_source.go:272] cert-manager/webhook "msg"="Updated serving TLS certificate"

Environment details:

  • Kubernetes version: 1.22.1
  • Cloud-provider/provisioner: none
  • cert-manager version: 1.5.3
  • Install method: kubectl apply

/kind bug
@jetstack-bot jetstack-bot added the kind/bug Categorizes issue or PR as related to a bug. label Sep 8, 2021
@janesser
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janesser commented Sep 10, 2021 •
edited
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Same with cert-manager 1.0.4 here; rancher 2.5.9, k8s 1.16.19, calico-cni flannel...

@busch
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busch commented Sep 10, 2021

When at least somebody would know where this error is coming from, then I would hopefully be able to troubleshoot this.
Is it the cert-manager pod talking to the cert-manager-webhook pod?

By deploying a test pod, I could confirm DNS resolution of "cert-manager-webhook.cert-manager.svc" is working and it is pointing to the cert-manager-webhook service:

/ # ping cert-manager-webhook.cert-manager.svc
PING cert-manager-webhook.cert-manager.svc (10.0.0.141): 56 data bytes
64 bytes from 10.0.0.141: seq=0 ttl=64 time=0.030 ms
64 bytes from 10.0.0.141: seq=1 ttl=64 time=0.059 ms
^C

telnet to port 443 also works:

/ # telnet cert-manager-webhook.cert-manager.svc 443
Connected to cert-manager-webhook.cert-manager.svc
^C

@janesser
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we have found that with networkpolicy we could enable/allow the required connection from container kube-apiserver in kube-system to the webhook, check this one: #2334 (comment)

@busch
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busch commented Sep 10, 2021

I don't run the kube-apiserver in a container.

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/lifecycle stale

@jetstack-bot jetstack-bot added the lifecycle/stale Denotes an issue or PR has remained open with no activity and has become stale. label Dec 9, 2021
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Stale issues rot after 30d of inactivity.
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@jetstack-bot jetstack-bot added lifecycle/rotten Denotes an issue or PR that has aged beyond stale and will be auto-closed. and removed lifecycle/stale Denotes an issue or PR has remained open with no activity and has become stale. labels Jan 8, 2022
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@jetstack-bot: Closing this issue.

In response to this:

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@DysphoricUnicorn
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Ahh, I absolutely love it when I have some weird issue, find someone else who had the exact same problem and it was closed without solution by a helpful stale bot.

Anyone figure something out for this yet? The docs mention this issue here: https://cert-manager.io/docs/troubleshooting/webhook/#error-nethttp-request-canceled-while-waiting-for-connection but don't actually have any help on what to do about it

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