I am trying to encrypt the traffic between a Graylog Forwarder and another Graylog Node.
On the Graylog Node i have setup a ca.pem, a key.pem, and a certificate.pem.
I have also created the Forwarder Input which is using the certificate.pem and the key.pem.
(I would add a picture of the Input I have setup but as a new user in this Forum I can only post a single Image)
On the Forwarder i have setup a stream and the corresponding Output which points at the input of the other Graylog Node.
I then transferred the ca.pem to the Forwarder and setup the Output to use the ca.pem file so that it can verify the Server certificate.
- When I am trying to connect to the Graylog Node via the openssl s_client program everything works fine. (Here I am also specifying the ca.pem)
- When I look at the Stream Output, the messages are shown as being forwarded
When Graylog is trying to Forward the Log messages to the Server I am getting the following errors:
2020-07-23T09:32:20.299+02:00 INFO [ForwarderOutput] Launched Forwarder output [Output/5f193ca70cb76c4e060291d8] successfully.
2020-07-23T09:32:30.203+02:00 ERROR [GRPCStreamingSenderClient] A gRPC client error occurred: [UNAVAILABLE: io exception
Channel Pipeline: [SslHandler#0, ProtocolNegotiators$ClientTlsHandler#0, WriteBufferingAndExceptionHandler#0, DefaultChannelPipeline$TailContext#0]]
2020-07-23T09:32:30.211+02:00 INFO [GRPCStreamingSenderClient] Restarting Forwarder network sender in [10000 MILLISECONDS]…
2020-07-23T09:32:30.708+02:00 ERROR [GRPCStreamingSenderClient] An error occurred while sending message [call was cancelled]
And on the Graylog Node itself I am not recieving anything.
Any Ideas regarding the GRPC Error Messages would be helpful.