Norbert  Ernser

Norbert Ernser

1595338800

Leader Election with Consul and Golang

Leader election is the process of designating a single node as the organizer of some task distributed among several nodes. The leader will be responsible for managing the others and coordinate the actions performed by other nodes. If for any reason the leader fails, other nodes will elect another leader and so on. This can help to ensure that nodes don’t conflict with each other.

Implementing the leader election algorithm with consul is quite easy:

  • Register the node as a service on Consul.
  • Create a session.
  • Try to put a Lock on that session. If you succeed you are leader if not… well you are not the leader.
  • Renew the session

It is just a naive implementation So do NOT use this in production.

Step 1: Download Consul and run on dev mode

$ ./consul agent -dev

**Step 2: **Register the node as a service on Consul

import (
    "github.com/hashicorp/consul/api"
    "time"
    "fmt"
)

// configs to connect to consul
client, err := api.NewClient(&api.Config{
    Address: "127.0.0.1:8500",
    Scheme:  "http",
})

if err != nil {
    panic(err)
}

err = client.Agent().ServiceRegister(&api.AgentServiceRegistration{
    Address: "http://127.0.0.1:8080",
    ID:      "node01_monitoring", // Unique for each node
    Name:    "monitoring", // Can be service type
    Tags:    []string{"monitoring"},
    Check: &api.AgentServiceCheck{
        HTTP:     "http://127.0.0.1:8080/_health",
        Interval: "10s",
    },
})

if err != nil {
    panic(err)

#consul #golang #microservices #consul #leader-election

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Buddha Community

Leader Election with Consul and Golang
Norbert  Ernser

Norbert Ernser

1595338800

Leader Election with Consul and Golang

Leader election is the process of designating a single node as the organizer of some task distributed among several nodes. The leader will be responsible for managing the others and coordinate the actions performed by other nodes. If for any reason the leader fails, other nodes will elect another leader and so on. This can help to ensure that nodes don’t conflict with each other.

Implementing the leader election algorithm with consul is quite easy:

  • Register the node as a service on Consul.
  • Create a session.
  • Try to put a Lock on that session. If you succeed you are leader if not… well you are not the leader.
  • Renew the session

It is just a naive implementation So do NOT use this in production.

Step 1: Download Consul and run on dev mode

$ ./consul agent -dev

**Step 2: **Register the node as a service on Consul

import (
    "github.com/hashicorp/consul/api"
    "time"
    "fmt"
)

// configs to connect to consul
client, err := api.NewClient(&api.Config{
    Address: "127.0.0.1:8500",
    Scheme:  "http",
})

if err != nil {
    panic(err)
}

err = client.Agent().ServiceRegister(&api.AgentServiceRegistration{
    Address: "http://127.0.0.1:8080",
    ID:      "node01_monitoring", // Unique for each node
    Name:    "monitoring", // Can be service type
    Tags:    []string{"monitoring"},
    Check: &api.AgentServiceCheck{
        HTTP:     "http://127.0.0.1:8080/_health",
        Interval: "10s",
    },
})

if err != nil {
    panic(err)

#consul #golang #microservices #consul #leader-election

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Nigel  Uys

Nigel Uys

1627973160

Leader Election with Consul and Golang

Leader election is the process of designating a single node as the organizer of some task distributed among several nodes. The leader will be responsible for managing the others and coordinate the actions performed by other nodes. If for any reason the leader fails, other nodes will elect another leader and so on. This can help to ensure that nodes don’t conflict with each other.

Implementing the leader election algorithm with consul is quite easy:

  • Register the node as a service on Consul.
  • Create a session.
  • Try to put a Lock on that session. If you succeed you are leader if not… well you are not the leader.
  • Renew the session

It is just a naive implementation So do NOT use this in production.

Step 1: Download Consul and run on dev mode

$ ./consul agent -dev

#golang 

Ajay Kapoor

1624960485

Golang vs. Node.JS: Who Trumps the Battle of Backend Frameworks?

Full blog here

The backend of your application is truly the essential part of your product. No matter how much you appreciate the design, the application’s success lies in its backend. A scalable backend that effectively implements the required business logic is the primary goal of programmers.

Therefore, it is crucial to choose the most powerful and scalable technology. There are plenty of languages ​​in the market that can form the backend of any application, Node.js and Golang are the two most popular technologies among them.

They are real and developed languages ​​that have recently been used in various outstanding projects. Golang is an open-source programming language, whereas Node.js is an open-source server framework. They both are gaining popularity for various reasons.

According to a development stat, it is observed that almost 50% out of 58,543 respondents use Node.js as their preferred app development tool.

Golang, on the other hand, has overtaken other programming languages in the application development market and has gained huge recognition over the past few years.

But, which backend framework is best for you? In this article, I’ll make a healthy comparison of two of Google’s most popular backend development tools based on several essential features and various other factors.

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