jstests/replsets/arbiter_new_hostname.js


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/*
 * An arbiter that is stopped and restarted on a different port and rejoins the
 * replica set should enter removed state and should not start data replication.
 *
 * @tags: [
 *     requires_fcv_49,
 * ]
 */
(function() {
    "use strict";
    const replTest = new ReplSetTest({name: 'test', nodes: 3});
    replTest.startSet();
    const nodes = replTest.nodeList();
    let config = {
        "_id": "test",
        "members": [
            {"_id": 0, "host": nodes[0]},
            {"_id": 1, "host": nodes[1]},
            {"_id": 2, "host": nodes[2], arbiterOnly: true}
        ]
    };
    replTest.initiate(config);

    let primary = replTest.getPrimary();
    replTest.awaitReplication();
    replTest.awaitSecondaryNodes();

    const arbiterId = 2;
    const newPort = replTest.getPort(arbiterId) + 1;
    jsTestLog("Restarting the arbiter node on a new port: " + newPort);
    replTest.stop(arbiterId);
    replTest.start(arbiterId, {port: newPort}, true);

    jsTestLog("Reconfiguring the set to change the arbiter's port.");
    config = replTest.getReplSetConfigFromNode();
    jsTestLog(`Original config: ${tojson(config)}`);

    const hostname = config.members[arbiterId].host.split(":")[0];
    config.version++;
    config.members[arbiterId].host = hostname + ":" + newPort;
    jsTestLog(`New config: ${tojson(config)}`);
    assert.commandWorked(primary.getDB("admin").runCommand({replSetReconfig: config}));
    replTest.awaitReplication();
    replTest.awaitNodesAgreeOnConfigVersion();
    replTest.stopSet();
}());