I am a newbie to k8s and I am trying to deploy a private docker registry in Kubernetes.
The problem is that whenever I have to upload a heavy image (1GB size) via docker push, the command eventually returns EOF.
Apparently, I believe the issue has to do with kubernetes ingress nginx controller.
I will provide you with some useful information, in case you need more, do not hesitate to ask:
Docker push (to internal k8s docker registry) fail:
[root@bastion ~]# docker push docker-registry.apps.kube.lab/example:stable
The push refers to a repository [docker-registry.apps.kube.lab/example]
c0acde035881: Pushed
f6d2683cee8b: Pushed
00b1a6ab6acd: Retrying in 1 second
28c41b4dd660: Pushed
36957997ca7a: Pushed
5c4d527d6b3a: Pushed
a933681cf349: Pushing [==================================================>] 520.4 MB
f49d20b92dc8: Retrying in 20 seconds
fe342cfe5c83: Retrying in 15 seconds
630e4f1da707: Retrying in 13 seconds
9780f6d83e45: Waiting
EOF
Ingress definition:
apiVersion: networking.k8s.io/v1beta1
kind: Ingress
metadata:
name: docker-registry
namespace: docker-registry
annotations:
nginx.ingress.kubernetes.io/proxy-body-size: "0"
nginx.ingress.kubernetes.io/proxy-connect-timeout: "86400"
nginx.ingress.kubernetes.io/proxy-read-timeout: "86400"
nginx.ingress.kubernetes.io/proxy-send-timeout: "86400"
spec:
rules:
- host: docker-registry.apps.kube.lab
http:
paths:
- backend:
serviceName: docker-registry
servicePort: 5000
path: /
Docker registry configuration (/etc/docker/registry/config.yml):
version: 0.1
log:
level: info
formatter: json
fields:
service: registry
storage:
redirect:
disable: true
cache:
blobdescriptor: inmemory
filesystem:
rootdirectory: /var/lib/registry
http:
addr: :5000
host: docker-registry.apps.kube.lab
headers:
X-Content-Type-Options: [nosniff]
health:
storagedriver:
enabled: true
interval: 10s
threshold: 3
Docker registry logs:
{"go.version":"go1.11.2","http.request.host":"docker-registry.apps.kube.lab","http.request.id":"c079b639-0e8a-4a27-96fa-44c4c0182ff7","http.request.method":"HEAD","http.request.remoteaddr":"10.233.70.0","http.request.uri":"/v2/example/blobs/sha256:751620502a7a2905067c2f32d4982fb9b310b9808670ce82c0e2b40f5307a3ee","http.request.useragent":"docker/1.13.1 go/go1.10.3 kernel/3.10.0-1127.el7.x86_64 os/linux arch/amd64 UpstreamClient(Docker-Client/1.13.1 \\(linux\\))","level":"debug","msg":"authorizing request","time":"2020-11-07T14:43:22.893626513Z","vars.digest":"sha256:751620502a7a2905067c2f32d4982fb9b310b9808670ce82c0e2b40f5307a3ee","vars.name":"example"}
{"go.version":"go1.11.2","http.request.host":"docker-registry.apps.kube.lab","http.request.id":"c079b639-0e8a-4a27-96fa-44c4c0182ff7","http.request.method":"HEAD","http.request.remoteaddr":"10.233.70.0","http.request.uri":"/v2/example/blobs/sha256:751620502a7a2905067c2f32d4982fb9b310b9808670ce82c0e2b40f5307a3ee","http.request.useragent":"docker/1.13.1 go/go1.10.3 kernel/3.10.0-1127.el7.x86_64 os/linux arch/amd64 UpstreamClient(Docker-Client/1.13.1 \\(linux\\))","level":"debug","msg":"GetBlob","time":"2020-11-07T14:43:22.893751065Z","vars.digest":"sha256:751620502a7a2905067c2f32d4982fb9b310b9808670ce82c0e2b40f5307a3ee","vars.name":"example"}
{"go.version":"go1.11.2","http.request.host":"docker-registry.apps.kube.lab","http.request.id":"c079b639-0e8a-4a27-96fa-44c4c0182ff7","http.request.method":"HEAD","http.request.remoteaddr":"10.233.70.0","http.request.uri":"/v2/example/blobs/sha256:751620502a7a2905067c2f32d4982fb9b310b9808670ce82c0e2b40f5307a3ee","http.request.useragent":"docker/1.13.1 go/go1.10.3 kernel/3.10.0-1127.el7.x86_64 os/linux arch/amd64 UpstreamClient(Docker-Client/1.13.1 \\(linux\\))","level":"debug","msg":"filesystem.GetContent(\"/docker/registry/v2/repositories/example/_layers/sha256/751620502a7a2905067c2f32d4982fb9b310b9808670ce82c0e2b40f5307a3ee/link\")","time":"2020-11-07T14:43:22.893942372Z","trace.duration":74122,"trace.file":"/go/src/github.com/docker/distribution/registry/storage/driver/base/base.go","trace.func":"github.com/docker/distribution/registry/storage/driver/base.(*Base).GetContent","trace.id":"11e24830-7d16-404a-90bc-8a738cab84ea","trace.line":95,"vars.digest":"sha256:751620502a7a2905067c2f32d4982fb9b310b9808670ce82c0e2b40f5307a3ee","vars.name":"example"}
{"err.code":"blob unknown","err.detail":"sha256:751620502a7a2905067c2f32d4982fb9b310b9808670ce82c0e2b40f5307a3ee","err.message":"blob unknown to registry","go.version":"go1.11.2","http.request.host":"docker-registry.apps.kube.lab","http.request.id":"c079b639-0e8a-4a27-96fa-44c4c0182ff7","http.request.method":"HEAD","http.request.remoteaddr":"10.233.70.0","http.request.uri":"/v2/example/blobs/sha256:751620502a7a2905067c2f32d4982fb9b310b9808670ce82c0e2b40f5307a3ee","http.request.useragent":"docker/1.13.1 go/go1.10.3 kernel/3.10.0-1127.el7.x86_64 os/linux arch/amd64 UpstreamClient(Docker-Client/1.13.1 \\(linux\\))","http.response.contenttype":"application/json; charset=utf-8","http.response.duration":"1.88607ms","http.response.status":404,"http.response.written":157,"level":"error","msg":"response completed with error","time":"2020-11-07T14:43:22.894147954Z","vars.digest":"sha256:751620502a7a2905067c2f32d4982fb9b310b9808670ce82c0e2b40f5307a3ee","vars.name":"example"}
10.233.105.66 - - [07/Nov/2020:14:43:22 +0000] "HEAD /v2/example/blobs/sha256:751620502a7a2905067c2f32d4982fb9b310b9808670ce82c0e2b40f5307a3ee HTTP/1.1" 404 157 "" "docker/1.13.1 go/go1.10.3 kernel/3.10.0-1127.el7.x86_64 os/linux arch/amd64 UpstreamClient(Docker-Client/1.13.1 \\(linux\\))"
I believe the issue has to do with ingress controller because when EOF error shows up, there is something weird in ingress-controller logs:
10.233.70.0 - - [07/Nov/2020:14:43:41 +0000] "PUT /v2/example/blobs/uploads/dab984a8-7e71-4481-91fb-af53c7790a20?_state=usMX2WH24Veunay0ozOF-RMZIUMNTFSC8MSPbMcxz-B7Ik5hbWUiOiJleGFtcGxlIiwiVVVJRCI6ImRhYjk4NGE4LTdlNzEtNDQ4MS05MWZiLWFmNTNjNzc5MGEyMCIsIk9mZnNldCI6NzgxMTczNywiU3RhcnRlZEF0IjoiMjAyMC0xMS0wN1QxNDo0MzoyOFoifQ%3D%3D&digest=sha256%3A101c41d0463bc77661fb3343235b16d536a92d2efb687046164d413e51bd4fc4 HTTP/1.1" 201 0 "-" "docker/1.13.1 go/go1.10.3 kernel/3.10.0-1127.el7.x86_64 os/linux arch/amd64 UpstreamClient(Docker-Client/1.13.1 \x5C(linux\x5C))" 606 0.026 [docker-registry-docker-registry-5000] [] 10.233.70.84:5000 0 0.026 201 06304ff584d252812dff016374be73ae
172.16.1.123 - - [07/Nov/2020:14:43:42 +0000] "HEAD /v2/example/blobs/sha256:101c41d0463bc77661fb3343235b16d536a92d2efb687046164d413e51bd4fc4 HTTP/1.1" 200 0 "-" "docker/1.13.1 go/go1.10.3 kernel/3.10.0-1127.el7.x86_64 os/linux arch/amd64 UpstreamClient(Docker-Client/1.13.1 \x5C(linux\x5C))" 299 0.006 [docker-registry-docker-registry-5000] [] 10.233.70.84:5000 0 0.006 200 a5a93c7b7f4644139fcb0697d3e5e43f
I1107 14:44:05.285478 6 main.go:184] "Received SIGTERM, shutting down"
I1107 14:44:05.285517 6 nginx.go:365] "Shutting down controller queues"
I1107 14:44:06.294533 6 status.go:132] "removing value from ingress status" address=[172.16.1.123]
I1107 14:44:06.306793 6 status.go:277] "updating Ingress status" namespace="kube-system" ingress="example-ingress" currentValue=[{IP:172.16.1.123 Hostname:}] newValue=[]
I1107 14:44:06.307650 6 status.go:277] "updating Ingress status" namespace="kubernetes-dashboard" ingress="dashboard" currentValue=[{IP:172.16.1.123 Hostname:}] newValue=[]
I1107 14:44:06.880987 6 status.go:277] "updating Ingress status" namespace="test-nfs" ingress="example-nginx" currentValue=[{IP:172.16.1.123 Hostname:}] newValue=[]
I1107 14:44:07.872659 6 status.go:277] "updating Ingress status" namespace="test-ingress" ingress="example-ingress" currentValue=[{IP:172.16.1.123 Hostname:}] newValue=[]
I1107 14:44:08.505295 6 queue.go:78] "queue has been shutdown, failed to enqueue" key="&ObjectMeta{Name:sync status,GenerateName:,Namespace:,SelfLink:,UID:,ResourceVersion:,Generation:0,CreationTimestamp:0001-01-01 00:00:00 +0000 UTC,DeletionTimestamp:<nil>,DeletionGracePeriodSeconds:nil,Labels:map[string]string{},Annotations:map[string]string{},OwnerReferences:[]OwnerReference{},Finalizers:[],ClusterName:,ManagedFields:[]ManagedFieldsEntry{},}"
I1107 14:44:08.713579 6 status.go:277] "updating Ingress status" namespace="docker-registry" ingress="docker-registry" currentValue=[{IP:172.16.1.123 Hostname:}] newValue=[]
I1107 14:44:09.772593 6 nginx.go:373] "Stopping admission controller"
I1107 14:44:09.772697 6 nginx.go:381] "Stopping NGINX process"
E1107 14:44:09.773208 6 nginx.go:314] "Error listening for TLS connections" err="http: Server closed"
2020/11/07 14:44:09 [notice] 114#114: signal process started
10.233.70.0 - - [07/Nov/2020:14:44:16 +0000] "PATCH /v2/example/blobs/uploads/adbe3173-9928-4eb5-97bb-7893970f032a?_state=nEr2ip9eoLNCTe8KQ6Ck7k3C8oS9IY7AnBOi1_f5mSl7Ik5hbWUiOiJleGFtcGxlIiwiVVVJRCI6ImFkYmUzMTczLTk5MjgtNGViNS05N2JiLTc4OTM5NzBmMDMyYSIsIk9mZnNldCI6MCwiU3RhcnRlZEF0IjoiMjAyMC0xMS0wN1QxNDo0MzoyOC45ODY3MTQwNTlaIn0%3D HTTP/1.1" 202 0 "-" "docker/1.13.1 go/go1.10.3 kernel/3.10.0-1127.el7.x86_64 os/linux arch/amd64 UpstreamClient(Docker-Client/1.13.1 \x5C(linux\x5C))" 50408825 46.568 [docker-registry-docker-registry-5000] [] 10.233.70.84:5000 0 14.339 202 55d9cab4f915f54e5c130321db4dc8fc
10.233.70.0 - - [07/Nov/2020:14:44:19 +0000] "PATCH /v2/example/blobs/uploads/63d4a54a-cdfd-434b-ae63-dc434dcb15f9?_state=9UK7MRYJYST--u7BAUFTonCdPzt_EO2KyfJblVroBxd7Ik5hbWUiOiJleGFtcGxlIiwiVVVJRCI6IjYzZDRhNTRhLWNkZmQtNDM0Yi1hZTYzLWRjNDM0ZGNiMTVmOSIsIk9mZnNldCI6MCwiU3RhcnRlZEF0IjoiMjAyMC0xMS0wN1QxNDo0MzoyMy40MjIwMDI4NThaIn0%3D HTTP/1.1" 202 0 "-" "docker/1.13.1 go/go1.10.3 kernel/3.10.0-1127.el7.x86_64 os/linux arch/amd64 UpstreamClient(Docker-Client/1.13.1 \x5C(linux\x5C))" 51842691 55.400 [docker-registry-docker-registry-5000] [] 10.233.70.84:5000 0 18.504 202 1f1de1ae89caa8540b6fd13ea5b165ab
10.233.70.0 - - [07/Nov/2020:14:44:50 +0000] "PATCH /v2/example/blobs/uploads/0c97923d-ed9f-4599-8a50-f2c21cfe85fe?_state=WmIRW_3owlin1zo4Ms98UwaMGf1D975vUuzbk1JWRuN7Ik5hbWUiOiJleGFtcGxlIiwiVVVJRCI6IjBjOTc5MjNkLWVkOWYtNDU5OS04YTUwLWYyYzIxY2ZlODVmZSIsIk9mZnNldCI6MCwiU3RhcnRlZEF0IjoiMjAyMC0xMS0wN1QxNDo0MzoyMC41ODA5MjUyNDlaIn0%3D HTTP/1.1" 202 0 "-" "docker/1.13.1 go/go1.10.3 kernel/3.10.0-1127.el7.x86_64 os/linux arch/amd64 UpstreamClient(Docker-Client/1.13.1 \x5C(linux\x5C))" 192310965 89.937 [docker-registry-docker-registry-5000] [] 10.233.70.84:5000 0 22.847 202 d8971d2f543e936c2f805d5b257f1130
I1107 14:44:50.832669 6 nginx.go:394] "NGINX process has stopped"
I1107 14:44:50.832703 6 main.go:192] "Handled quit, awaiting Pod deletion"
I1107 14:45:00.832892 6 main.go:195] "Exiting" code=0
[root@bastion registry]#
After that happens, ingres-controller pod is not ready, and after some seconds it is again ready.
Is it to do with config reload of kubernetes nginx ingress controller? In such case, do I have to add any special variable to nginx.conf?
Any help is welcome! Kind regards!
EDIT
The moment EOF appears, ingress-nginx crashes, and pods become not ready.
[root@bastion ~]# kubectl get po
NAME READY STATUS RESTARTS AGE
ingress-nginx-admission-create-lbmd6 0/1 Completed 0 5d4h
ingress-nginx-admission-patch-btv27 0/1 Completed 0 5d4h
ingress-nginx-controller-7dcc8d6478-n8dkx 0/1 Running 3 15m
Warning Unhealthy 29s (x8 over 2m39s) kubelet Liveness probe failed: Get http://10.233.70.100:10254/healthz: net/http: request canceled while waiting for connection (Client.Timeout exceeded while awaiting headers)
As a consequence, any of my applications are not reachable:
[root@bastion ~]# curl http://hello-worrld.apps.kube.lab
Hello, world!
Version: 1.0.0
Hostname: web-6785d44d5-4r5q5
[root@bastion ~]# date
sáb nov 7 18:58:16 -01 2020
[root@bastion ~]# curl http://hello-worrld.apps.kube.lab
curl: (52) Empty reply from server
[root@bastion ~]# date
sáb nov 7 18:58:53 -01 2020
Is the issue to do with performance of nginx? If so, what options would you recommend me to tweak ingress-nginx?
nginx.ingress.kubernetes.io/proxy-body-sizesolved your issue? – Mr.KoopaKiller