NemchinovSergey

Portainer on Windows 10

Here I have 2 methods for running portainer on windows, a quick, preferred method only requiring a fairly recent version of docker, or a more complicated method to try if that does not work.

Using host.docker.internal

This setup will let you run Portainer on windows by using the host.docker.internal endpoint (docker.for.win.localhost is depricated since docker version 3.2.1, but older versions may use this instead).

Please note:

NemchinovSergey

System Design Cheatsheet

Picking the right architecture = Picking the right battles + Managing trade-offs

Basic Steps

1. Clarify and agree on the scope of the system

• User cases (description of sequences of events that, taken together, lead to a system doing something useful)
  • Who is going to use it?
  • How are they going to use it?

NemchinovSergey

Sample config for 2 million web socket connection

    sysctl -w fs.file-max=12000500
    sysctl -w fs.nr_open=20000500
    # Set the maximum number of open file descriptors
    ulimit -n 20000000

    # Set the memory size for TCP with minimum, default and maximum thresholds 
 sysctl -w net.ipv4.tcp_mem='10000000 10000000 10000000'

NemchinovSergey

/**
 * Please review the class below and suggest improvements. How would
 * you refactor this class if it would be in a real-life project?
 * There are many problems here, both high-level design mistakes,
 * and low-level implementation bugs. We're interested to see high-level
 * problems first, since they are most critical. The more mistakes
 * you can spot, the better programmer you are.
 */
 
/**

NemchinovSergey

import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.powermock.api.mockito.PowerMockito;
import org.powermock.core.classloader.annotations.PrepareForTest;
import org.powermock.modules.junit4.PowerMockRunner;

import java.time.Instant;
import java.util.Date;

NemchinovSergey

/*
 * See LICENSE for licensing and NOTICE for copyright.
 */
package edu.vt.middleware.app;

import java.io.File;
import java.security.*;
import java.util.ArrayList;
import java.util.List;
import java.util.function.Predicate;