node-dns-syncer

README

node-dns-syncer

Syncs Cloudflare DNS-records with Kubernetes nodes

Retrives k8s node ips and generates DNS A-records for them.

It makes possible to access this nodes directly. It might be usefull if you want to reduce traffic transitions.

Example

For example we have 3 nodes with external ips:

10.0.0.1
10.0.0.2
10.0.0.3

and we have domain zone example.org. This script will generate following DNS A-records:

abra--0a000001.example.org 10.0.0.1
abra--0a000002.example.org 10.0.0.2
abra--0a000003.example.org 10.0.0.3

0a000001 is just hex representaion of original ip-address 10.0.0.1

Usage

% ./node-dns-syncer help sync
Syncs Cloudflare DNS-records with Kubernetes nodes

Usage:
  node-dns-syncer sync [flags]

Flags:
      --cf-api-email string         Cloudflare API Email
      --cf-api-key string           Cloudflare API Key
      --cf-zones strings            Cloudflare zones
      --domain-name-prefix string   Domain name prefix
      --domain-name-suffix string   Domain name suffix
      --dry-run                     Dry run
  -h, --help                        help for sync
      --k8s-label-selector string   Kubernetes node label selector

Global Flags:
      --config string   config file (default is $HOME/.node-dns-syncer.yaml)

Helm chart

You can find helm-chart there.

Documentation

Overview

Copyright © 2020 NAME HERE <EMAIL ADDRESS>

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.