Lab 3.5 - Can't connect to nginx
I face the problem that I cannot call my NGINX instance from an external browser:site can’t be reached
I'm using GCP and the external IP provided by GCP that I also use for connecting with SSH from my local machine together with the port 30383 from the loadbalance service (see below).
My current set up:
student@master:~$ kubectl get pod,deployment,service NAME READY STATUS RESTARTS AGE pod/nginx-d46f5678b-9dpx5 1/1 Running 0 22m pod/nginx-d46f5678b-mr7r4 1/1 Running 0 5s NAME READY UP-TO-DATE AVAILABLE AGE deployment.apps/nginx 2/2 2 2 5h21m NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE service/kubernetes ClusterIP 10.96.0.1 <none> 443/TCP 25h service/nginx LoadBalancer 10.103.88.235 <pending> 80:30383/TCP 14m
A local test on the master node looks good:
student@master:~$ curl localhost:30383 <!DOCTYPE html> <html> <head> <title>Welcome to nginx!</title> <style> [ ... ]
I also checked with tcpdump and saw traffic between master and worker as soon as I send a request from the external browser. But I noticed that these dump doesn't contain any real data packages that I see when I do a cluster local test with curl:
22:50:25.781453 IP 192.168.219.64.38165 > 192.168.171.71.http: Flags [P.], seq 1:80, ack 1, win 512, options [nop,nop,TS val 1849845571 ecr 2061161969], length 79: HTTP: GET / HTTP/1.1 22:50:25.781516 IP 192.168.171.71.http > 192.168.219.64.38165: Flags [.], ack 80, win 510, options [nop,nop,TS val 2061161970 ecr 1849845571], length 0 22:50:25.781799 IP 192.168.171.71.http > 192.168.219.64.38165: Flags [P.], seq 1:239, ack 80, win 510, options [nop,nop,TS val 2061161970 ecr 1849845571], length 238: HTTP: HTTP/1.1 200 OK
Instead in the test with browser there are only SYN/ACK handshakes:
22:53:47.987759 IP worker.35869 > 192.168.219.75.http: Flags [S], seq 2475810478, win 64240, options [mss 1460,sackOK,TS val 2990407375 ecr 0,nop,wscale 7], length 0 22:53:47.988855 IP 192.168.219.75.http > worker.35869: Flags [S.], seq 1435520403, ack 2475810479, win 65236, options [mss 1400,sackOK,TS val 3688879141 ecr 2990407375,nop,wscale 7], length 0 22:53:49.008869 IP worker.35869 > 192.168.219.75.http: Flags [S], seq 2475810478, win 64240, options [mss 1460,sackOK,TS val 2990408387 ecr 0,nop,wscale 7], length 0 22:53:49.009081 IP 192.168.219.75.http > worker.35869: Flags [S.], seq 1435520403, ack 2475810479, win 65236, options [mss 1400,sackOK,TS val 3688880162 ecr 2990407375,nop,wscale 7], length 0 22:53:50.040391 IP 192.168.219.75.http > worker.35869: Flags [S.], seq 1435520403, ack 2475810479, win 65236, options [mss 1400,sackOK,TS val 3688881193 ecr 2990407375,nop,wscale 7], length 0 22:53:51.017923 IP worker.35869 > 192.168.219.75.http: Flags [S], seq 2475810478, win 64240, options [mss 1460,sackOK,TS val 2990410403 ecr 0,nop,wscale 7], length 0 22:53:51.018137 IP 192.168.219.75.http > worker.35869: Flags [S.], seq 1435520403, ack 2475810479, win 65236, options [mss 1400,sackOK,TS val 3688882171 ecr 2990407375,nop,wscale 7], length 0 22:53:53.048372 IP 192.168.219.75.http > worker.35869: Flags [S.], seq 1435520403, ack 2475810479, win 65236, options [mss 1400,sackOK,TS val 3688884201 ecr 2990407375,nop,wscale 7], length 0
Does anyone know what the problem is?
Comments
-
Hi @ctschacher,
Does your VPC have a firewall rule to allow all ingress traffic into the cluster (from all sources, to all ports, all protocols)?
Regards,
-Chris0
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