mkmik

import 'dart:math';

var random = Random.secure();

Future<int> rand()  {
  return Future.delayed(new Duration(seconds: 1), () { return random.nextInt(200); });
}

Future<int> get() async {
  print("beginning to save");

mkmik

Config file with embedded secrets

Kubernetes Secrets are very flexible and can be consumed in many ways. Secret values can be passed to containers as environment variables or appear as regular files when mouting secret volumes.

Often users end up using the latter method just to wrap full configuration files into k8s secrets, just because one or more fields in the config file happen to be secrets (e.g. a database password, or a session cookie encryption key).

Ideally you should avoid configuring your software that way and instead splitting your configuration from your secrets somehow. Also make sure you know about 12 Factor.

mkmik

#!/bin/bash

fake_command() {
  echo some junk
  return 1
}

demo() {
  FOO="$(fake_command)"

mkmik

package main

import (
	"fmt"
	"log"

	"github.com/google/go-jsonnet"
	"github.com/google/go-jsonnet/ast"
	"github.com/google/go-jsonnet/toolutils"
)

mkmik

#!/bin/bash

kapp deploy -c -y -a kdemo -f app.yaml

trap 'kill $(jobs -p)' EXIT

kubectl port-forward deploy/kdemo 8080:8080 &
sleep 2

curl http://localhost:8080

mkmik

#!/bin/bash

set -e

path="$1"

if [ -z "${path}" ]; then
  echo "usage: $0 <package or path>"
  exit 1
fi

mkmik

for i in $(crane ls bitnami/node | grep -E '^[0-9]+'); do crane manifest bitnami/node:$i; done >/tmp/layers.jsonish

mkmik

// Turns out that this iterator is unnecessary since the std::option::Option type
// itself implements this exact semantics


/// An iterator that yields an element once or never.
///
/// This `struct` is created by the [`once_if_ever`] function. See its documentation for more.
pub struct OnceIfEver<T> {
    value: Option<T>,
}

mkmik

[package]
name = "prostdemo"
version = "0.1.0"
authors = ["Marko Mikulicic <[email protected]>"]
edition = "2018"

# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html

[dependencies]
prost = "0.7"

mkmik

use std::process::{Command, Stdio};
use std::os::unix::net::UnixStream;
use std::os::unix::io::{AsRawFd,FromRawFd};

fn main() {
    let (_sock1, sock2) =  UnixStream::pair().unwrap();

    Command::new("sleep")
        .arg("200")
        .stdin(unsafe{Stdio::from_raw_fd(sock2.as_raw_fd())})