minecluster/lib/controllers/sub-controllers/console-controller.js

// Imports
import k8s from "@kubernetes/client-node";
import { Rcon as RconClient } from "rcon-client";
import stream from "stream";
import { ERR, WARN } from "../../util/logging.js";
import { getServerEntry } from "../../database/queries/server-queries.js";
import kc from "../../k8s/k8s-config.js";
// Kubernetes Configuration

const k8sCore = kc.makeApiClient(k8s.CoreV1Api);
const namespace = process.env.MCL_SERVER_NAMESPACE;

// Retrieves logs from the minecraft server container
export async function webConsoleLogs(socket) {
  const { serverId } = socket.mcs;
  const server = await getServerEntry(serverId);
  const podName = `mcl-${server.mclName}`;
  const containerName = `${podName}-server`;
  const podResponse = await k8sCore.listNamespacedPod(namespace);
  const pods = podResponse.body.items.map((vp1) => vp1.metadata.name);
  const mcsPods = pods.filter((p) => p.startsWith(podName));
  if (mcsPods.length === 0)
    throw Error(`Could not find a pod that starts with ${podName}`);
  if (mcsPods.length > 1)
    throw Error(`Multiple pods match the name ${podName}`);

  const log = new k8s.Log(kc);
  const logStream = new stream.PassThrough();
  logStream.on("data", (chunk) =>
    socket.emit("push", Buffer.from(chunk).toString()),
  );
  log
    .log(namespace, mcsPods[0], containerName, logStream, {
      follow: true,
      pretty: false,
      timestamps: false,
    })
    .catch((e) => ERR("CONSOLE CONTROLLER", "Error streaming logs", e));
}

// Creates an RCON connection to the minecraft container
export async function webConsoleRcon(socket) {
  if (socket.rconClient)
    return VERB("RCON", "Socket already connected to RCON");
  const { serverId } = socket.mcs;
  const server = await getServerEntry(serverId);
  const rconSecret = `mcl-${server.mclName}-rcon-secret`;
  const rconRes = await k8sCore.readNamespacedSecret(rconSecret, namespace);
  const rconPassword = Buffer.from(
    rconRes.body.data["rcon-password"],
    "base64",
  ).toString("utf8");
  const rconHost = `mcl-${server.mclName}-rcon.${namespace}.svc.cluster.local`;
  const rcon = new RconClient({
    host: rconHost,
    port: 25575,
    password: rconPassword,
  });
  rcon.on("error", (error) => socket.emit("push", error));
  try {
    await rcon.connect();
  } catch (error) {
    socket.emit("rcon-error", "Could not connect RCON Input to server!");
    WARN("RCON", `Could not connect to '${rconHost}'`);
  }
  socket.rconClient = rcon;
}