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SNS

Overview

SNS(super-name-system) is a DNS-like product developed for intranet service discovery. Users can use the SDKs to resolve domain names into IP:Port. The difference from DNS is SNS provides flexible traffic scheduling capabilities. Base on this, users can quickly build functions such as Sentinel-Stress-Testing, Blue-Green-Deployment.

the domain name in SNS is a specific concept, similar to the domain name in DNS, but not exactly the same.

Quick Start

Requirements

• go version >= 1.22.3
• A working docker environment

Installation

step 1: setup

git clone git@github.com:ironzhang/sns.git
(cd sns/scripts/setup && ./setup.sh init)

step 2: run sns-agent

(cd sns/sns-agent && make && ./sns-agent)

Usage

first, we create some k8s pods

kubectl apply -f deployment.yaml

The deployment.yaml is as follows:

apiVersion: apps/v1
kind: Deployment
metadata:
  name: k8s-myapp-deployment
  labels:
    app: k8s-myapp-deployment-v1
spec:
  replicas: 1
  selector:
    matchLabels:
      app: myapp
      cluster: dev.default.k8s
  template:
    metadata:
      labels:
        app: myapp
        cluster: dev.default.k8s
    spec:
      containers:
      - name: nginx
        image: nginx:1.22
        ports:
        - name: http
          containerPort: 80
        - name: https
          containerPort: 443

then, we can use sns-lookup to resolve the domains

sns-lookup sns/http.myapp
sns-lookup sns/https.myapp

we can use the SDK to resolve the domains too, see supernamego.