Checking current all AWS lambda function's total/provisioned/reserved count.

check_lambda_provision.js

const AWS = require('aws-sdk');
const lambda = new AWS.Lambda({ region: 'ap-northeast-2' });

const sleep = async (ms) => { await new Promise(resolve => setTimeout(resolve, ms)); };

const getFuncList = async () => {
  let funcList = [];
  let isStop = false;
  let params = {}

  while (!isStop) {
    await sleep(500);
    let data = await lambda.listFunctions(params).promise();
    funcList.push(...data.Functions);

    params.Marker = data.NextMarker;
    if (!data.NextMarker) isStop = true;
  }

  return funcList;
};


const getProvisionConfig = async (funcName) => {
  let data = await lambda.listProvisionedConcurrencyConfigs({ FunctionName: funcName }).promise();

  let config;
  if (data.ProvisionedConcurrencyConfigs.length > 0) {
    config = data.ProvisionedConcurrencyConfigs[0];
    console.log(`${funcName}, [${config.AllocatedProvisionedConcurrentExecutions} / ${config.RequestedProvisionedConcurrentExecutions}]`);

    if (data.ProvisionedConcurrencyConfigs.length > 1) {
      console.log(data.ProvisionedConcurrencyConfigs);
    }
  }

  return config? config.AllocatedProvisionedConcurrentExecutions : 0;
};

const getReservedConfig = async (funcName) => {
  let data = await lambda.getFunctionConcurrency({ FunctionName: funcName }).promise();

  if (data.ReservedConcurrentExecutions) {
    console.log(`${funcName}, ${data.ReservedConcurrentExecutions}`);
  }
};


(async () => {
  let funcList= await getFuncList();
  console.log(`total lambda counts, ${funcList.length}`);

  console.log('>>> provisioned');
  let totalCount = 0;
  for (let i = 0; i < funcList.length; i++) {
    await sleep(100);
    func = funcList[i];
    totalCount += await getProvisionConfig(func.FunctionName);
  }
  console.log(totalCount);

  console.log('>>> reserved');
  for (let i = 0; i < funcList.length; i++) {
    func = funcList[i];
    await getReservedConfig(func.FunctionName);
  }
})();

Checking current all AWS lambda function's total/provisioned/reserved count.

• ex)

$ node check_provision.js
total lambda counts, 200
>>> provisioned
function_name_1, [10 / 10]
function_name_2, [2 / 2]
...
100 # total provisioned count
>>> reserved
function_name_3, 10