您可以在節點代碼中處理POSIX信號。
參見例如代碼,將處理SIGINT(Ctrl-C鍵,例如),作爲所有羣集工人STOP信號,和SIGUSR2將只重新啓動所有工人
因此,發行kill -SIGUSR2 PID
,其中PID是節點主PID將重新啓動所有羣集
module.exports = function(app) {
var cluster = require('cluster');
var numCPUs = require('os').cpus().length;
var workerList = new Array();
var sigkill = false;
if (cluster.isMaster) {
for (var i = 0; i < numCPUs; i++) {
var env = process.env;
var worker = cluster.fork(env);
workerList.push(worker);
}
process.on('SIGUSR2',function(){
console.log("Received SIGUSR2 from system");
console.log("There are " + workerList.length + " workers running");
workerList.forEach(function(worker){
console.log("Sending STOP message to worker PID=" + worker.pid);
worker.send({cmd: "stop"});
});
});
process.on('SIGINT',function(){
sigint = true;
process.exit();
});
cluster.on('death', function(worker) {
if (sigkill) {
logger.warn("SIGKINT received - not respawning workers");
return;
}
var newWorker = cluster.fork();
console.log('Worker ' + worker.pid + ' died and it will be re-spawned');
removeWorkerFromListByPID(worker.pid);
workerList.push(newWorker);
});
} else {
process.on('message', function(msg) {
if (msg.cmd && msg.cmd == 'stop') {
console.log("Received STOP signal from master");
app.close();
process.exit();
}
});
app.listen(3000);
}
function removeWorkerFromListByPID(pid) {
var counter = -1;
workerList.forEach(function(worker){
++counter;
if (worker.pid === pid) {
workerList.splice(counter, 1);
}
});
}
}
SIGUSR2處理程序是否需要重新啓動剛剛停止的進程? –
哦,我明白了......我認爲'死亡'事件現在在節點v0.10中'退出'了? –
還有一個問題......它會優雅地重新啓動服務器,但它根本沒有重新加載服務器代碼,對嗎?那需要進行某種外部監控? –