How to run mongodump command in spawn/exec child process with arguments

Question

I need to run mongodump command with below arguments

    var dbhost = mongoose.connection.host || "127.0.0.1",
                    dbport = mongoose.connection.port,
                    dbname = mongoose.connection.name,
                    dbuser = mongoose.connection.options.user,
                    dbpass = mongoose.connection.options.pass,
                    backupPath = path,
                    date = new Date(),
                    currentDate =  date.toLocaleString(),
                    backupFileName ='DBBACKUP-'+currentDate;

how to pass above variables to child process

I've tried with below code

var backupDB = spawn('mongodump --host '+dbhost+' --port '+dbport+' --username '+dbuser+' --password '+dbpass+' --db '+dbname+' --archive=backupFileName.gz --gzip');
backupDB.stdout.on('data',function(data){ console.log('stdout: ' + data);

it throwed this error

error: uncaughtException: spawn mongodump --host 127.0.0.1 --port 27017 --username --password --db mydb --archive=backupFileName.gz --gzip ENOENT

Can you not just interpolate the values into the string?

Neil Lunn
– Neil Lunn

2017-05-30 04:31:54 +00:00
Commented May 30, 2017 at 4:31 — Neil Lunn
– Neil Lunn, Commented May 30, 2017 at 4:31
But really, just read here Template Literals

Neil Lunn
– Neil Lunn

2017-05-30 04:37:22 +00:00
Commented May 30, 2017 at 4:37 — Neil Lunn
– Neil Lunn, Commented May 30, 2017 at 4:37

robertklep · Accepted Answer · 2017-05-30 05:58:55Z

2

According to the fine manual, spawn() takes the name of a command, and an array of arguments to pass to that command:

var backupDB = spawn('mongodump', [
  '--host',     dbhost,
  '--port',     dbport,
  '--username', dbuser,
  '--password', dbpass,
  '--db',       dbname,
  '--archive=backupFileName.gz',
  '--gzip'
]);

answered May 30, 2017 at 5:58

robertklep

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Comments

Srinivas · Accepted Answer · 2017-05-31 05:32:03Z

1

I've tried this and it works perfectly

var backupDB = exec('mongodump --host='+dbhost+' --port='+dbport+' --username='+dbuser+' --password='+dbpass+' --db='+dbname+' --archive='+backupPathDir+'/'+backupFileName+'.gz  --gzip');
            backupDB.stdout.on('data',function(data){
                console.log('stdout: ' + data);// process output will be displayed here
            });

answered May 31, 2017 at 5:32

Srinivas

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