Edgemesh-agent cannot connect to Edgemesh-server tunnel server

[vickiyan]

What happened: edgemesh-agent cannot establish connection with edgemesh-server successfully. error is as below:

What you expected to happen: edgemesh-agent can establish connection successfully. How to reproduce it (as minimally and precisely as possible): kubeedge 1.8.2 version + edgemesh 1.8.0 version , edge and master nodes are in private network without internet access.

Anything else we need to know?: master node ip :30.23.5.58 ,it's public ip also. edgenode ip is 30.23.6.135 kubectl get node and edgemesh-server-cfg cm as below:

edgenode could telnet tunnelserver 20004 successfully, screenshot as below:

edgenode ifconfig screenshot

master node ifconfig screenshot

edgemesh server pod logs screenshot:

Environment:

• EdgeMesh version: 1.8.0 version

• Kubernetes version (use kubectl version): 1.15.2

• KubeEdge version(e.g. cloudcore --version and edgecore --version): 1.8.2

• Cloud nodes Environment:

  • Hardware configuration (e.g. lscpu):
  • OS (e.g. cat /etc/os-release): centos 7.6
  • Kernel (e.g. uname -a):
  • Go version (e.g. go version):
  • Others:
• Edge nodes Environment:

  • edgecore version (e.g. edgecore --version):
  • Hardware configuration (e.g. lscpu):
  • OS (e.g. cat /etc/os-release):
  • Kernel (e.g. uname -a):
  • Go version (e.g. go version):
  • Others:

[vickiyan]

感觉和下面的问题有点像 https://github.com/libp2p/go-libp2p/issues/968

[kason-huang]

Do you try to connect 30.23.5.58:40001 in edgemesh-agent container? And it seems that the edgemesh-agent do not have the permission to edit the /etc/resolv.conf? How do you install the edgemesh? Helm?

[kason-huang]

/assign

[vcozzolino]

I have a similar problem with edgemesh v1.8.0.

I have a cluster with 4 edge nodes and 1 cloud node. In my case, only the edgemesh-agent running on the cloud node is not able to connect to the edgemesh-server with the following error:

W0322 09:55:59.742042       1 tunnel.go:28] Connection between agent and server [/ip4/7.182.9.110/tcp/10005 /ip4/127.0.0.1/tcp/10005 /ip4/7.182.9.110/tcp/10005] is not established, try connect
I0322 09:55:59.742101       1 tunnel.go:31] Tunnel agent connecting to tunnel server
W0322 09:55:59.742769       1 tunnel.go:34] Connect to server err: failed to dial QmPiD14D2xtBGtGgjA7C7k396M4NZAjrqJuvTm5EXwQuVf: all dials failed
  * [/ip4/7.182.9.110/tcp/10005] failed to negotiate security protocol: protocol not supported
  * [/ip4/127.0.0.1/tcp/10005] failed to negotiate security protocol: protocol not supported

The edgemesh-agents running on the edge nodes can connect without issues.

[Poorunga]

@vcozzolino Seems to be using a different version of edgemesh-agent. You can checkout every edgemesh-agent image ID.