What is a secondary DNS?
Synchronize records
Update records
What is a secondary DNS?
Secondary DNS is a backup DNS that stores a copy of the information about your zones and records. It receives data from the main server. To use our DNS as a secondary one, send it information about all DNS records right from the databases of your provider using this instruction.
Before starting work, make sure that your provider is in the table of providers that support OctoDNS. If not, unfortunately, it is not possible to transfer the records automatically.
Synchronize records of G-Core Labs DNS with your DNS
This tutorial will help you to install OctoDNS — a tool for managing DNS zones of different providers. Using it, you will make records on our DNS server identical to records on yours. That's how it works:
1. In your account, create a necessary DNS zone manually. If the zone has been already created, skip this step.
2. On your PC, update a local package index to download all new versions.
sudo apt update
Perform all next steps of this tutorial on your PC.
3. Install python and virtualenv packages.
sudo apt install python virtualenv
4. Create necessary directories for OctoDNS — a tool for managing DNS zones.
mkdir ~/octodns ~/octodns/config
5. Go to “octodns”.
cd ~/octodns
6. Create a python virtual environment, activate it and stay in it while you work with this tutorial.
7. (Optional) if you don’t have Git, install it via the following command:
sudo apt-get install git-all
8. In virtualenv, install OctoDNS pip packages for two providers: G-Core Labs and yours. To do this, use the command below (replace "octodns_yourprovider" to "module" of your provider from the table of providers).
pip install --user octodns octodns_gcore octodns_yourprovider
After installation, request OctoDNS version to make sure everything works.
octodns-sync --version
You will receive a response with your OctoDNS version, for example:
octoDNS 0.9.17
If you see the error:
octodns-sync: command not found
Most likely you are not in virtualenv. Do steps № 4-6 again.
9. Go to the “config” directory you have already created.
cd ~/octodns/config
10. Create a configuration file inside.
nano config.yaml
In this configuration file, you need to specify providers and zones that OctoDNS will manage as well as the dependencies between them. The final file will look like this:
We will tell you how to fill in each data section. First, copy the template below and paste it into the configuration file (for the .yaml format, indentations are very important — our template will help you to enter the data exactly so that the program can read it):
providers:
[your provider name]:
[your provider class]
[authentication data, line №1]
[authentication data, line №2]
[authentication data, line №...]
gcore:
class: octodns_gcore.GCoreProvider
[authentication data, line №1]
[authentication data, line №2]
[authentication data, line №...]
zones:
[your DNS zone №1].:
sources:
- [your provider name]
targets:
- gcore
[your DNS zone №2].:
sources:
- [your provider name]
targets:
- gcore
Secondly, you have to fill in providers sections. Templates for them are located in OctoDNS repositories of providers. Let's start filling in from the provider G-Core Labs DNS. To open its repository, open the table of providers and click module name "octodns_gcore".
Find the "Configuration" section. Three things are described there: provider name, provider class name and authentification data.
Provider name (gcore) and class name (class: octodns_gcore.GCoreProvider) are already in our configuration file template, you don't need to copy-paste them. Now you have to fill in authentification data according to what is writtten in the "Conguration" section. You can choose what authentication data to use: an API key or a login-password pair. We recommend using an API key.
Example of configuration with an API key:
gcore:
class: octodns_gcore.GCoreProvider
token: Fdjkfjsflsfjdjjfjsnflfdlsdf&fsfhd
token_type: APIKey
Example of configuration with a login-password pair:
gcore:
class: octodns_gcore.GCoreProvider
login: Yourlogin
password: Yourpassword
auth_url: https://api.gcorelabs.com
url: https://api.gcorelabs.com/dns/v2
records_per_response: 1
In config.yaml file, fill in your provider section as you've just did it for G-Core Labs DNS: open its repository, find the "Configuration" section, copy-paste provider name and its class name, fill in authentication data. If your provider is Amazon Route 53, the result may look as follows:
route53:
class: octodns_route53.Route53Provider
access_key_id: YourKeyID
secret_access_key: YourSecretKeyID
gcore:
class: octodns_gcore.GCoreProvider
token: Fdjkfjsflsfjdjjfjsnflfdlsdf&fsfhd
token_type: APIKey
Then fill in the DNS zones data. For each zone, enter its name and a pair of source-target providers. Your provider will act as a source (OctoDNS will take DNS records from its databases), and G-Core Labs DNS provider will act as a target (its records will be edited to be identical to data of your provider). For example, to synchronize DNS records of “myzone.com” and “mymyzone.com” zones, you need to enter the following data:
After adding all zones to the file, save changes and close it.
11. The last step is synchronizing DNS records. Run the test command first — it will show you what changes OctoDNS will make during synchronization.
octodns-sync --config-file=[your configuration file directory]
For example, if the directory of the configuration file is /home/ubuntu/octodns/config/config.yaml, then the command will be:
octodns-sync --config-file=/home/ubuntu/octodns/config/config.yaml
If the configuration file was filled out correctly, you will get output with a similar summary at the end:
These are the changes OctoDNS is going to make to our DNS records. If everything is correct, run the command to make these changes:
octodns-sync --config-file=[your configuration file directory] --doit
You will see similar output:
It means the changes have been made. You can see the updated list of records in your control panel in the DNS tab.
Update records of our secondary DNS
The instructions below are for updating records manually. If you need an auto-update of records, set up automatic execution of the commands from this instruction via the cron daemon.
1. Go to “octodns”.
cd ~/octodns
2. Activate the python virtual environment.
3. You have already configured necessary zones as part of the instruction "Synchronize records in DNS G-Core Labs with your DNS" above. To synchronize DNS records, run the command:
octodns-sync --config-file=[your config file directory] --doit
You will see similar output:
It means the changes have been made. You can see the updated list of records in your control panel in the DNS tab.