Data Transformation

.js

var x = [ {node: "ip2", app: "dbsyncer", containerId: "1234"},
	  {node: "ip2", app: "logforwa", containerId: "3423"},
	  {node: "ip4", app: "dbsyncer", containerId: "2213"},
	  {node: "ip4", app: "logforwa", containerId: "3434"} ]
				
var newObj = {};

x.forEach(function (item) {
  newObj[item.node] = newObj[item.node] || [];
  
  newObj[item.node].push(item);
  item.node = undefined
})

console.log(JSON.stringify(newObj));

var result = [];
for (i in newObj) {
  if (newObj.hasOwnProperty(i)) {
    var node = newObj
    result.push({i: newObj[i]})
  }
}


// Henry's Solution
var myObj = {}

x.forEach(function (item) {
  if (myObj[item.node]) {
    myObj[item.node].push({app: item.app, containerId: item.containerId})
  } else {
    myObj[item.node] = []
    myObj[item.node].push({app: item.app, containerId: item.containerId})
  }
})