Deploy your DNS configuration using GitHub Actions using DNSControl.
These are the three relevant sub commands to use with this action.
Run the action with the 'check' argument in order to check and validate the dnsconfig.js
file. This action does not communicate with the DNS providers, hence does not require
any secrets to be set.
name: Check
on: pull_request
jobs:
check:
runs-on: ubuntu-latest
steps:
- uses: actions/checkout@v2
- name: DNSControl check
uses: koenrh/dnscontrol-action@v3
with:
args: check
# Optionally, if your DNSConfig files are in a non-default location,
# you could specify the paths to the config and credentials file.
config_file: 'dns/dnsconfig.js'
Run the action with the 'preview' argument to check what changes need to be made. It prints out what DNS records are expected to be created, modified or deleted. This action requires the secrets for the specified DNS providers.
name: Preview
on: pull_request
jobs:
preview:
runs-on: ubuntu-latest
steps:
- uses: actions/checkout@v3
- name: DNSControl preview
uses: koenrh/dnscontrol-action@v3
id: dnscontrol_preview
env:
CLOUDFLARE_API_TOKEN: ${{ secrets.CLOUDFLARE_API_TOKEN }}
with:
args: preview
# Optionally, if your DNSConfig files are in a non-default location,
# you could specify the paths to the config and credentials file.
config_file: 'dns/dnscontrol.js'
creds_file: 'dns/creds.json'
This is the action you probably want to run for each branch so that proposed changes could be verified before an authorized person merges these changes into the default branch.
Optionally, you could configure your GitHub Action so that the output of the 'preview' command is published as a comment to the pull request for the branch containing the changes. This saves you several clicks through the menus to get to the output logs for the preview job.
******************** Domain: example.com
----- Getting nameservers from: cloudflare
----- DNS Provider: cloudflare...6 corrections
#1: CREATE record: @ TXT 1 v=spf1 include:_spf.google.com -all
#2: CREATE record: @ MX 1 1 aspmx.l.google.com.
#3: CREATE record: @ MX 1 5 alt1.aspmx.l.google.com.
#4: CREATE record: @ MX 1 5 alt2.aspmx.l.google.com.
#5: CREATE record: @ MX 1 10 alt3.aspmx.l.google.com.
#6: CREATE record: @ MX 1 10 alt4.aspmx.l.google.com.
----- Registrar: none...0 corrections
Done. 6 corrections.
Provided that your GitHub Action job for 'preview' has an id
dnscontrol_preview
, you could use the following snippet to enable pull request
comments using Unsplash's comment-on-pr
GitHub Action.
- name: Preview pull request comment
uses: unsplash/comment-on-pr@v1.3.0
env:
GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
with:
msg: |
${{ steps.dnscontrol_preview.outputs.preview_comment }}
```
check_for_duplicate_msg: true
### push
Run the action with the 'push' argument to publish the changes to the specified
DNS providers.
Running the action with the 'push' argument will publish the changes with the
specified DNS providers. The example workflow depicted below contains a filtering
pattern so that it only runs on the default branch.
```yaml
name: Push
on:
push:
branches:
- main
jobs:
push:
runs-on: ubuntu-latest
steps:
- uses: actions/checkout@v3
- name: DNSControl push
uses: koenrh/dnscontrol-action@v3
env:
CLOUDFLARE_API_TOKEN: ${{ secrets.CLOUDFLARE_API_TOKEN }}
with:
args: push
# Optionally, if your DNSConfig files are in a non-default location,
# you could specify the paths to the config and credentials file.
config_file: 'dns/dnsconfig.js'
creds_file: 'dns/creds.json'
Depending on the DNS providers that are used, this action requires credentials to
be set. These secrets can be configured through a file named creds.json
. You
should not add secrets as plaintext to this file, but use GitHub
Actions encrypted secrets
instead. These encrypted secrets are exposed at runtime as environment variables.
See the DNSControl Service Providers
documentation for details.
To follow the Cloudflare example, add an encrypted secret named CLOUDFLARE_API_TOKEN
and then define the creds.json
file as follows.
{
"cloudflare":{
"TYPE": "CLOUDFLAREAPI",
"apitoken": "$CLOUDFLARE_API_TOKEN"
}
}
Dependabot is a GitHub service that helps developers to automate dependency maintenance and keep dependencies updated to the latest versions. It has native support for GitHub Actions, which means you can use it in your GitHub repository to keep the DNSConrol Acion up-to-date.
To enable Dependabot in your GitHub repository, add a .github/dependabot.yml
file with the following contents:
version: 2
updates:
# Maintain dependencies for GitHub Actions
- package-ecosystem: "github-actions"
directory: "/"
schedule:
interval: "daily"