Config Sync by Example

Config Sync allows cluster operators to manage single clusters, multi-tenant clusters, and multi-cluster Kubernetes deployments using files, called configs, stored in a Git repository.

Some configs are Kubernetes object manifests. Other configs are not object manifests, but instead provide information needed by Config Sync itself. You can write configs in YAML or JSON. Config Sync watches for updates to these files and applies changes to all relevant clusters automatically.

_— Google — _Config Sync Overview

Please note: Prior to learning about Config Sync, my go-to approach to managing Kubernetes resources across one or more clusters was Terraform configurations stored in a GIT repository evaluated by a CI/CD pipeline.

Please note: The final set of Config Sync configuration files developed through this article are available for download.

How is Config Sync licensed?

It is not entirely clear. What is clear from the documentation is that Config Sync is both made available as a stand-alone tool (there is no mention of pricing or licensing that I could find) and as part of Google’s commercial Anthos product. As a matter of fact, Google maintains two sets of virtually identical documentation for Config Sync:

It is also clear that Google has not open-sourced Config Sync; the software downloads are from Google.

Does Config Sync require Google Kubernetes Engine (GKE)?

While the installation instructions mention that the clusters must run GKE version 1.14x or later, anecdotally it does appear to run on other clusters. This article was written with Amazon Elastic Kubernetes Service (EKS) 1.17x.

Prerequisites

If you wish to follow along, you will need:

  • A workstation: In this article I used Linux; same operations should work on macOS (not sure about Windows)
  • A Kubernetes cluster: GKE version 1.14x or later. Anecdotally, it also appears to work with Amazon EKS 1.17x or later
  • A_ kubectl_ command line interface (CLI) tool authenticated/authorized to the Kubernetes cluster with the cluster-admin ClusterRole
  • A Google Cloud Platform (GCP) project; only needed to download the Config Sync software
  • The gcloud CLI tool authenticated / authorized to the GCP project; only needed to download the Config Sync software
  • An empty GIT repository, e.g., a GitHub repository. It can be private; in this article it was left public for simplicity

Install Config Sync

The first step is to use one of the gcloud CLI tools, gsutil, to download a Kubernetes configuration:

$ gsutil cp gs://config-management-release/released/latest/config-sync-operator.yaml config-sync-operator.yaml

While optional, we also install a Config Sync CLI tool; nomos:

$ gcloud components install nomos

We then apply the downloaded Kubernetes configuration to the cluster:

$ kubectl apply -f config-sync-operator.yaml

Under the hood, this configuration installs the following:

  • CustomResourceDefinition: configmanagements.configmanagement.gke.io
  • ClusterRoleBinding: config-management-operator
  • ClusterRole: config-management-operator
  • ServiceAccount: kube-system:config-management-operator
  • Deployment: kube-system:config-management-operator
  • Namespace: config-management-system

Configure Config Sync

We clone the empty GIT repository to our workstation and create a ConfigManagement custom resource configuration; hello-config-sync-configmanagement.yaml in its folder:

Things to observe:

  • The name’s value is arbitrary; can be left as config-management as in the official Config Sync documentation
  • The clusterName value is an arbitrary name that is used to uniquely identify a particular cluster. If one has multiple clusters, one would create multiple custom resource configuration files; one per cluster. Each file would be identical except for the clusterName value. In my example, I named my single cluster hello-config-sync
  • The syncRepo value refers to the GIT repository URL
  • The secretType value refers to a secret that is required to access the GIT repository; my repository is public so I use none
  • The policyDir value refers to a folder in the GIT repository that holds the Config Sync configuration files used to manage the clusters; in our case _policy _(we will create below)
  • The ConfigManagement custom resource configuration files themselves are not to be stored in the _policyDir. _Also, these files did not need to be stored in the GIT repository at all; only did so for documentation purposes.

#kubernetes #management

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Config Sync by Example

What is SYNC Network (SYNC) | What is SYNC Network token | What is SYNC token

What is SYNC Network (SYNC)?

SYNC Network is composed of two main contracts: the SYNC ERC-20 contract and the CryptoBond ERC-721 contract. SYNC tokens have an undefined total supply with inflationary and deflationary attributes through the interactions with CryptoBond investment.

SYNC is the native utility token that is used for?

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SYNC Tools Include:

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How many tokens are in circulation?

  • There are currently 16 million SYNC tokens(approx. 2.5% of total supply). On Nov. 30th, 2020 the CryptoBonds contract will be launched triggering the start of SYNC tokens Fair Release Schedule. Upon launch 14 million tokens will be minted making the initial supply on day one 30 million tokens. Coins can be minted for 360 days. The daily emission rate of tokens halves (reduced by 50%) every 30 days. The starting emission rate will be 5 million tokens per day. At the end of the 360 day period the total amount of tokens minted will be 630 million tokens. (this does not include any tokens that may be burned from CryptoBond creation or interest minted from CryptoBond maturation)

source : CryptoPedic

Who Are the Founders of SYNC Network?

Scott Bondsman is the project manager, founder, marketing and business development lead. He is a DEfi enthusiast and had the original idea for the project. He has a background in mechanical engineering and large scale project management. He got his start in crypto early 2017. Between then and now he has invested in countless projects and has a wide knowledge base of crypto.

The Front end dev has been coding websites for over 20 years and has a background in corporate banking. He has been in the crypto space since 2011 when he started solo mining bitcoin. Since then he has been involved with multiple smart contracts.

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How and Where to Buy SYNC Network (SYNC)?

SYNC has been listed on a number of crypto exchanges, unlike other main cryptocurrencies, it cannot be directly purchased with fiats money. However, You can still easily buy this coin by first buying Bitcoin, ETH, USDT from any large exchanges and then transfer to the exchange that offers to trade this coin, in this guide article we will walk you through in detail the steps to buy SYNC

You will have to first buy one of the major cryptocurrencies, usually either Bitcoin (BTC), Ethereum (ETH), Tether (USDT)…

We will use Binance Exchange here as it is one of the largest crypto exchanges that accept fiat deposits.

Binance is a popular cryptocurrency exchange which was started in China but then moved their headquarters to the crypto-friendly Island of Malta in the EU. Binance is popular for its crypto to crypto exchange services. Binance exploded onto the scene in the mania of 2017 and has since gone on to become the top crypto exchange in the world.

Once you finished the KYC process. You will be asked to add a payment method. Here you can either choose to provide a credit/debit card or use a bank transfer, and buy one of the major cryptocurrencies, usually either Bitcoin (BTC), Ethereum (ETH), Tether (USDT)

SIGN UP ON BINANCE

Step by Step Guide : What is Binance | How to Create an account on Binance (Updated 2021)

Next step - Transfer your cryptos to an Altcoin Exchange

Since SYNC is an altcoin we need to transfer our coins to an exchange that SYNC can be traded. Below is a list of exchanges that offers to trade SYNC in various market pairs, head to their websites and register for an account.

Once finished you will then need to make a BTC/ETH/USDT deposit to the exchange from Binance depending on the available market pairs. After the deposit is confirmed you may then purchase SYNC from the exchange.

Exchange: Uniswap

Apart from the exchange(s) above, there are a few popular crypto exchanges where they have decent daily trading volumes and a huge user base. This will ensure you will be able to sell your coins at any time and the fees will usually be lower. It is suggested that you also register on these exchanges since once SYNC gets listed there it will attract a large amount of trading volumes from the users there, that means you will be having some great trading opportunities!

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I hope this post will help you. If you liked this, please sharing it with others. Thank you!

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Laravel AJAX CRUD Example Tutorial

Hello Guys,

Today I will show you how to create laravel AJAX CRUD example tutorial. In this tutorial we are implements ajax crud operation in laravel. Also perform insert, update, delete operation using ajax in laravel 6 and also you can use this ajax crud operation in laravel 6, laravel 7. In ajax crud operation we display records in datatable.

Read More : Laravel AJAX CRUD Example Tutorial

https://www.techsolutionstuff.com/post/laravel-ajax-crud-example-tutorial


Read Also : Read Also : Laravel 6 CRUD Tutorial with Example

https://techsolutionstuff.com/post/laravel-6-crud-tutorial-with-example

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3 Examples Of Design Applications With Great UX

When it comes to design, it has long been said that simplicity is key. And although I always understood the basis for this saying, I never fully appreciated what it really meant.

As a beginner it is natural to want to show all your ability by wowing your audience. And as a teacher I see my students making this mistake often. They try to build out features as much as possible and try to showcase every aspect of their ability. As many of you know, this approach does not always result in the most aesthetically pleasing design, let alone the most user friendly experience. This is why I have stressed the importance of simplicity to all my students from the first day I started teaching.

For our latest project, I assigned teams of 4 to each create a prototype for a design application.

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Alice Cook

Alice Cook

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Gmail not Syncing | Can’t Sync Gmail App (2020 - 21)

After getting through all the above-given steps, if the issues of Gmail app can’t sync still persist, feel free to reach the technical experts for help. Moreover, if you need assistance regarding Gmail can’t sync chrome? No need to get fret; feel free to reach the technical experts for help whenever you want.

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I am Developer

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PHP jQuery Ajax Post Form Data Example

PHP jquery ajax POST request with MySQL. In this tutorial, you will learn how to create and submit a simple form in PHP using jQuery ajax post request. And how to submit a form data into MySQL database without the whole page refresh or reload. And also you will learn how to show an error message to the user if the user does not fill any form field.

And this tutorial also guide on how to send data to MySQL database using AJAX + jQuery + PHP without reloading the whole page and show a client-side validation error message if it has an error in the form.

PHP jQuery AJAX POST Form Data In Into MySQL DB Example

Just follow the few below steps and easily create and submit ajax form in PHP and MySQL with client-side validation.

  • Create Database And Table
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  • Create An Ajax POST Form in PHP
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