prayagsingh

git cheat-sheet

The git command-line utility has plenty of inconsistencies http://steveko.wordpress.com/2012/02/24/10-things-i-hate-about-git/

A GUI like http://sourcetreeapp.com is often helpful, but staying on the command line usually quicker. This is a list of the commands I use most frequently, listed by funcional category:

current state

git status list which (unstaged) files have changed

prayagsingh

version: "3.7"

services:
  traefik:
    image: traefik:v2.1.3
    restart: always
    container_name: traefik
    ports:
      - target: 80
        published: 80

prayagsingh

[http]
    [http.middlewares]
         [http.middlewares.https-redirect.redirectscheme]
              scheme = "https"
              permanent = true
         [http.middlewares.security-headers.headers]
              # CORS
              AccessControlAllowMethods = ["GET", "OPTIONS", "PUT"]
              AccessControlAllowOrigin = "origin-list-or-null"

prayagsingh

# docker stack deploy -c stack-tr-main.yml traefik --prune

version: "3.7"
services:
  main:
    image: traefik:v2.1.2
    healthcheck:
      test: wget --quiet --tries=1 --spider https://traefik.labs.cometari.eu/ping || exit 1
      interval: 3s
      timeout: 1s

prayagsingh

# docker stack deploy -c stack-app.yml app --with-registry-auth --prune
version: "3.7"

services:
  backend:
    image: jakubhajek/nodejs-backend:latest
    healthcheck:
      test: wget --quiet --tries=1 --spider http://localhost:3000/ || exit 1
      interval: 3s
      timeout: 1s

prayagsingh

# docker stack deploy -c stack-canary.yml canary --with-registry-auth --prune
version: "3.7"

services:
  app1:
    image: jakubhajek/app1-node:v1
    healthcheck:
      test: wget --quiet --tries=1 --spider http://localhost:3000/ || exit 1
      interval: 3s
      timeout: 1s

prayagsingh

log:
  level: info
  format: json

accessLog:
  format: json
  bufferingSize: 5

providers:
  docker:

prayagsingh

Ingress - https://kubernetes.io/docs/concepts/services-networking/ingress/
Ingress controller - https://kubernetes.io/docs/concepts/services-networking/ingress-controllers/
DEMO 1
=======================
Centos 7 system 
yum install docker -y
systemctl start docker 
systemctl enable docker 
#install docker-compose 
sudo curl -L "https://github.com/docker/compose/releases/download/1.26.2/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose

prayagsingh

export const ws = webSocket<WebsocketMessage>(`wss://${location.hostname}:${location.protocol === 'https:' ? 443 : 80}/ws/`);

export const wsObserver = ws
  .pipe(
    retryWhen(errors =>
      errors.pipe(
        delay(1000)
      )
    )
  );

prayagsingh

package main

import (
	"context"
	"encoding/hex"
	"fmt"
	"github.com/ethereum/go-ethereum/accounts/abi"
	"github.com/ethereum/go-ethereum/common"
	"github.com/ethereum/go-ethereum/core/types"
	"github.com/ethereum/go-ethereum/ethclient"