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This is my very first tool written in Go.
Get the binary from releases page
hetzner-kube is written in Go. To install Go please follow the instructions on its homepage.
To get and build
hetzner-kube from source run this command:
$ go get -u github.com/xetys/hetzner-kube
The project source will now be in your
$GOPATH directory (
$GOPATH/src/github.com/xetys/hetzner-kube) and the binary will be in
If you want to build it yourself later, you can change into the source directory and run
go build or
To load completion run
source <(hetzner-kube completion bash)
To configure your bash shell to load completions for each session add to your "~/.bashrc" file
# ~/.bashrc or ~/.profile echo 'source <(hetzner-kube completion bash)\n' >> ~/.bashrc
Or you can add it to your
# On linux hetzner-kube completion bash > /etc/bash_completion.d/hetzner-kube # On OSX with completion installed via brew (`brew install bash-completion`) hetzner-kube completion bash > /usr/local/etc/bash_completion.d/hetzner-kube
To configure your zsh shell to load completions run following commands:
# On linux hetzner-kube completion zsh | sudo tee /usr/share/zsh/vendor-completions/_hetzner-kube # On OSX hetzner-kube completion zsh | sudo tee /usr/share/zsh/site-functions/_hetzner-kube
Than rebuild autocomplete function with:
In your Hetzner Console generate an API token and
$ hetzner-kube context add my-project Token: <PASTE-TOKEN-HERE>
Then you need to add an SSH key:
$ hetzner-kube ssh-key add -n my-key
This assumes, you already have a SSH keypair
And finally, you can create a cluster by running:
$ hetzner-kube cluster create --name my-cluster --ssh-key my-key
This will provision a brand new kubernetes cluster in latest version!
To access the cluster via kubectl, create a config file:
# Write ~/.kube/config (you'll be asked to overwrite if file already exists) hetzner-kube cluster kubeconfig my-cluster # Alternatively, create a separate file and point kubectl to it: #hetzner-kube cluster kubeconfig --print my-cluster > ~/.kube/config-my-cluster #export KUBECONFIG=~/.kube/config-my-cluster
For a full list of options that can be passed to the
cluster create command, see the Cluster Create Guide for more information.
You can build high available clusters with hetzner-kube. Read the High availability Guide for further information.
You can install some addons to your cluster using the
cluster addon sub-command. Get a list of addons using:
$ hetzner-kube cluster addon list
You want to add some cool stuff to hetzner-kube? It's quite easy! Learn how to add new addons in the Developing Addons documentation.
If you are running an external etcd cluster, you can use the etcd management to backup the etcd cluster using
$ hetzner-kube cluster etcd backup my-cluster --snapshot-name my-snapshot
--snapshot-name is optional)
and restore it using
$ hetzner-kube cluster etcd restore my-cluster --snapshot-name my-snapshot
If you place a different snapshot (with
.db file extension) in /root/etcd-snapshots of the
first etcd node, you can use the restore command for migration of kubernetes clusters.
After a cluster is once created (nodes creation is enough), you can perform the steps from
hetzner-kube cluster create separately.
You can use
$ hetzner-kube cluster phase -h
to only list all available phases.
Cluster creation is a chain of these phases:
Some of theses phase have additional options, to run the actual phase differently from the usual cluster creation.
To simply run a phase from cluster creation, you cam run a phase, eg. the
etcd phase using:
$ hetzner-kube cluster phase etcd my-cluster
In order to upgrade or migrate a cluster, you might want to keep the etcd data, and run
$ hetzner-kube cluster phase etcd my-cluster --keep-data
and preserve the existing certificates using
$ hetzner-kube cluster phase install-master my-cluster --keep-all-certs
The latter command can be also useful during cluster migration, if you place the existing certs
in /etc/kubernetes/pki before running the
If you like to run some scripts or install some additional packages while provisioning new servers, you can use cloud-init
$ hetzner-kube cluster create --name my-cluster --nodes 3 --ssh-key my-key --cloud-init <PATH-TO-FILE>
An example file to make all nodes ansible ready. The comment on the first line is important:
#cloud-config package_update: true packages: - python
This article guides through a full cluster setup.