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https://github.com/earthquakesan/hetzner-one-node-k8s
One node k8s clusters on Hetzner with k3s
https://github.com/earthquakesan/hetzner-one-node-k8s
Last synced: 25 days ago
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One node k8s clusters on Hetzner with k3s
- Host: GitHub
- URL: https://github.com/earthquakesan/hetzner-one-node-k8s
- Owner: earthquakesan
- Created: 2023-10-30T11:20:40.000Z (over 1 year ago)
- Default Branch: main
- Last Pushed: 2023-11-03T15:22:35.000Z (over 1 year ago)
- Last Synced: 2024-11-16T13:04:48.992Z (3 months ago)
- Language: Shell
- Size: 11.7 KB
- Stars: 0
- Watchers: 1
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
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README
# hetzner-one-node-k8s
One node k8s clusters on Hetzner with k3s
## Why do you need 1 node k8s cluster?
* Costs: 5.77 Euros + 0.60 Euros for IPv4 + 0.50 Euros for DNS zone (Route53)
* Still getting all the goodies of k8s: self-healing, rolling upgrades, operators for the cloud resources etc.
* [There are people running k3s in space](https://www.suse.com/success/hypergiant/)
The downsides are:
* No automatic failover. If the node fails - that's it!
## Local Setup
This will create .env file in the root of the repository for service principal credentials. Use the file to setup CI/CD pipelines:
```
make bootstrap
export USE_DOT_ENV=true
# hcloud token to provision k3s instance in Hetzner Cloud
export TF_VAR_hcloud_token=token
# AWS access: e.g., iam user with AmazonRoute53FullAccess policy
# Can also trim the permissions down more - refer to the external DNS documentation
export AWS_ACCESS_KEY_ID=key
export AWS_SECRET_ACCESS_KEY=secret
make tf-init
make tf-plan
```
## Service Principal: Rotate Credentials
The following command will not recreate any of the storage account/containers, but will rotate the service principal secret (saved to .env file locally):
```
make bootstrap
```
## Clean Up Environment
Run the following command to remove resource group and service principal in Azure:
```
make clean
```
## Resources
* [miro board](https://miro.com/app/board/uXjVNUrcV7I=/?share_link_id=600413404192)