Running two instances on a single machine (pre-prod and preview)

[HeptaSean]

Why would you need separate executables?

Setting up cardano-node with mithril-client on preview, preprod, and mainnet

My goal with this post is to have cardano-nodes on both testnets – preview and preprod – and on mainnet running as a user, so I can later use them for minting, contract experiments etc. I’m not going to run a pool and this is not about setting up one. To setup as fast and simple as possible, I’m going to use the pre-compiled binaries. Moreover, since we now have Mithril to get snapshots of the chains and do not have to synchronise from the beginning anymore, I’m going to use that. Installing t…

Choosing different ports and different socket files when starting the node is important.

In that setup, I get different ports by

@HeptaSean

Since I want to be able to run the nodes on the different chains/networks in parallel and the port the node itself listens on will be given on the command line and is not set in config.json, I create environment files that can be read by the systemd unit in the next section:

$ cat ~/.local/cardano/chains/mainnet/env
CARDANO_NODE_PORT=3001
$ cat ~/.local/cardano/chains/preprod/env
CARDANO_NODE_PORT=3002
$ cat ~/.local/cardano/chains/preview/env
CARDANO_NODE_PORT=3003

and:

@HeptaSean

EnvironmentFile=%h/.local/cardano/chains/%i/env
ExecStart=%h/.local/bin/cardano-node run […] --port ${CARDANO_NODE_PORT}

And I get different sockets by:

@HeptaSean

WorkingDirectory=%h/.local/cardano/chains/%i/
[…]
ExecStart=%h/.local/bin/cardano-node run […] --socket-path socket […]