Author Archives: bullgare

Talk about pros and cons of GraphQL

Pros: Very flexible — clients decide which fields of which entities they need. Documentation and test UI are available by default. Cons: Code looks ugly. N+1 selects problem is hard to solve (most probably — with some ad-hoc). It’s harder to test as you don’t know all the use cases. Not a binary protocol — …

DOCKER_CONTENT_TRUST=1 docker run --rm --name dd-agent -p 8126:8126 -v /var/run/docker.sock:/var/run/docker.sock:ro -v /proc/:/host/proc/:ro -v /sys/fs/cgroup/:/host/sys/fs/cgroup:ro -e DD_API_KEY=REPLACE_WITH_NEW_KEY -e DD_SITE=datadoghq.eu datadog/agent

1	DOCKER_CONTENT_TRUST=1 docker run --rm --name dd-agent -p 8126:8126 -v /var/run/docker.sock:/var/run/docker.sock:ro -v /proc/:/host/proc/:ro -v /sys/fs/cgroup/:/host/sys/fs/cgroup:ro -e DD_API_KEY=REPLACE_WITH_NEW_KEY -e DD_SITE=datadoghq.eu datadog/agent

Run virtual machine Ubuntu/Windows on m1 macos

There is a program called UTM based on QEMU and developed for m1 MacBook virtualization. At least Ubuntu Server is working fine for me. https://mac.getutm.app/guide/. More info on this — https://eshop.macsales.com/blog/72081-utm-virtual-machine-on-m1-mac/

Debugging go app in Jetbrains Goland on m1

First download a proper version of GoLand here — select .dmg (MacOS Apple Silicon) here (direct link — https://www.jetbrains.com/go/download/download-thanks.html?type=eap&platform=macM1&build=211.6556.11&code=GO). Then make sure you are using arm version of go (go version go1.16.2 darwin/arm64). If not, download and install arm version of golang (like «go1.16.2.darwin-arm64.pkg») from the list here — https://golang.org/dl/. Now it should work. With …

Example of using embed in go

Nice article on using go templates with embed introduced in go1.16: https://philipptanlak.com/web-frontends-in-go/. That’s the code:

Run Steam on MacBook with m1 chip (apple silicon)

You need to install Crossover. Then you need to install Steam there. Good video explaining the process of installing Steam on Apple Silicon chips: https://www.youtube.com/watch?v=3TdCV7fn2CA Here is the list of supported games — https://applesilicongames.com/

Embedding assets to go binary in go 1.16

That’s how you can use it:

package server

import "embed"

// content holds our static web server content.
//go:embed image/* template/*
//go:embed html/index.html
var content embed.FS
data, _ := f.ReadFile("html/index.html")
print(string(data))

package server

import "embed"

// content holds our static web server content.

//go:embed image/* template/*

//go:embed html/index.html

var content embed.FS

data, _ := f.ReadFile("html/index.html")

print(string(data))

Or embedding one file directly into a variable:

import _ "embed"

//go:embed hello.txt
var s string
print(s)

import _ "embed"

//go:embed hello.txt

var s string

print(s)

More details — https://golang.org/pkg/embed/

mmock for mocking microservices

It is a very easy to set up though pretty powerful tool with support for delays and handling query params. It also has a console for checking all the requests and corresponding responses matched. Here it is https://github.com/jmartin82/mmock. Below I describe a way to use it with docker-compose for local development.

Forward multiple kubernetes pods for local development

kubefwd is a great tool that can forward a lot of pods at once to your local machine. The only downside for me is that it touches your local /etc/hosts. That’s how I use it:

sudo KUBECONFIG=<path to your k8s config> kubefwd svc -l "app in (first-api, second-api, third-service)"

1	sudo KUBECONFIG=<path to your k8s config> kubefwd svc -l "app in (first-api, second-api, third-service)"

It does not have huge documentation, but it is written in golang, and you can check how the source …

XDebug inside a docker container

That’s how you can debug your php app running in a docker container.