mirror of https://github.com/hyperledger/besu
An enterprise-grade Java-based, Apache 2.0 licensed Ethereum client https://wiki.hyperledger.org/display/besu
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
75 lines
3.6 KiB
75 lines
3.6 KiB
description: Pantheon networking is about P2P discovery and communication between peers and access to the JSON RPC APIs
|
|
<!--- END of page meta data -->
|
|
|
|
# Networking
|
|
|
|
Pantheon uses the network to find and connect to peers.
|
|
|
|
## Port Configuration
|
|
|
|
Ports must be exposed appropriately to enable communication. An example port configuration for a Pantheon node on AWS is:
|
|
|
|
|
|
|
|
### P2P Networking
|
|
|
|
To enable peer discovery, the P2P UDP port must be open for inbound connections.
|
|
|
|
We also recommended opening the P2P TCP port for inbound connections. This is not strictly required because
|
|
Pantheon attempts to initiate outbound TCP connections. However, if no nodes on the network are accepting inbound TCP
|
|
connections, nodes cannot communicate.
|
|
|
|
The P2P port is specified by the [`--p2p-port`](../Reference/Pantheon-CLI-Syntax.md#p2p-port) option.
|
|
The default is `30303`.
|
|
|
|
### JSON-RPC API
|
|
|
|
To enable access to the [JSON-RPC API](../JSON-RPC-API/JSON-RPC-API.md), open the HTTP JSON-RPC and WebSockets JSON-RPC ports to the intended users
|
|
of the JSON-RPC API on TCP.
|
|
|
|
The [`--rpc-http-port`](../Reference/Pantheon-CLI-Syntax.md#rpc-http-port) and [`--rpc-ws-port`](../Reference/Pantheon-CLI-Syntax.md#rpc-ws-port)
|
|
options specify the HTTP and WebSockets JSON-RPC ports. The defaults are `8545` and `8546`.
|
|
|
|
### Metrics
|
|
|
|
To enable [Prometheus to access Pantheon](../Using-Pantheon/Debugging.md#monitor-node-performance-using-prometheus),
|
|
open the metrics port or metrics push port to Prometheus or the Prometheus push gateway on TCP.
|
|
|
|
The [`--metrics-port`](../Reference/Pantheon-CLI-Syntax.md#metrics-port) and [`--metrics-push-port`](../Reference/Pantheon-CLI-Syntax.md#metrics-push-port)
|
|
options specify the ports for Prometheus and Prometheus push gateway. The defaults are `9545` and `9001`.
|
|
|
|
## Node Connections
|
|
|
|
The default logging configuration does not list node connection and disconnection messages.
|
|
|
|
To enable listing of node connection and disconnection messages, specify the
|
|
[`--logging`](../Reference/Pantheon-CLI-Syntax.md#logging) command line option `--logging=DEBUG`.
|
|
For more verbosity, specify `--logging=TRACE`.
|
|
|
|
The console logs connection and disconnection events when the log level is `DEBUG` or higher.
|
|
If `Successfully accepted connection from ...` is displayed, connections are getting through the firewalls.
|
|
|
|
!!! example "Example log output"
|
|
`2018-10-16 12:37:35.479-04:00 | nioEventLoopGroup-3-1 | INFO | NettyP2PNetwork | Successfully accepted connection from 0xa979fb575495b8d6db44f750317d0f4622bf4c2aa3365d6af7c284339968eef29b69ad0dce72a4d8db5ebb4968de0e3bec910127f134779fbcb0cb6d3331163c`
|
|
|
|
## Limiting Peers
|
|
|
|
Limiting peers reduces the bandwidth used by Pantheon. It also reduces the CPU time and disk access
|
|
used to manage and respond to peers.
|
|
|
|
Use the [`--max-peers`](../Reference/Pantheon-CLI-Syntax.md#max-peers) command line option to reduce
|
|
the maximum number of peers. The default is 25.
|
|
|
|
## No Discovery
|
|
|
|
The [`--discovery-enabled`](../Reference/Pantheon-CLI-Syntax.md#discovery-enabled) command line option
|
|
can be used to disable P2P peer discovery.
|
|
Set this option to `false` if you are running a test node or a test network with fixed nodes.
|
|
|
|
Use the [`admin_addPeer`](../Reference/JSON-RPC-API-Methods.md#admin_addpeer) JSON-RPC method to add peers when
|
|
[`--discovery-enabled`](../Reference/Pantheon-CLI-Syntax.md#discovery-enabled) is set to false.
|
|
|
|
## Monitoring Peer Connections
|
|
|
|
Use the [`debug_metrics`](../Reference/JSON-RPC-API-Methods.md#debug_metrics) JSON-RPC API method
|
|
to obtain information about peer connections. |