Get test Infrastructure based on Oracle Cloud Free Tier offering.
This terraform setup builds an always free instance and bootstraps a test setup.
It supports different flavors:
- kubernetes
- k3s
To simplify the setup and to mitigate security concerns there is no external traffic allowed to the installed stuff. either work remote on the vm or use a ssh tunnel.
Checked combinations:
| version | OS Version |
|---|---|
| k3s 1.22x | Ubuntu 20.04 |
| k8s 1.23x | Ubuntu 20.04 |
This terraform setup builds an always free instance and bootstraps there a single node kubernetes cluster (latest version).
At the time of writing this builds a single instance with 4 cores and 24 memory ram.
$ scp -rv ubuntu@<public ip>:~/.kube/config.localhost ~/.kube/config
$ ssh -NL 6443:127.0.0.1:6443 -l ubuntu <public ip>
$ kubectl cluster-info
Kubernetes control plane is running at https://localhost:6443
CoreDNS is running at https://localhost:6443/api/v1/namespaces/kube-system/services/kube-dns:dns/proxy
To further debug and diagnose cluster problems, use 'kubectl cluster-info dump'.
$ kubectl get nodes
NAME STATUS ROLES AGE VERSION
k8s-0 NotReady control-plane,master 22s v1.22.2
$ kubectl get pods --all-namespaces
NAMESPACE NAME READY STATUS RESTARTS AGE
kube-system coredns-78fcd69978-sp8r6 0/1 Pending 0 3m1s
kube-system coredns-78fcd69978-vbs6x 0/1 Pending 0 3m1s
kube-system etcd-k8s-0 1/1 Running 1 3m1s
kube-system kube-apiserver-k8s-0 1/1 Running 1 3m
kube-system kube-controller-manager-k8s-0 1/1 Running 1 3m
kube-system kube-proxy-9dpcb 1/1 Running 0 3m1s
kube-system kube-scheduler-k8s-0 1/1 Running 1 3m1sthis setup assumes your public ssh key is at ~/.ssh/id_rsa.pub
-
Sign up at https://www.oracle.com/de/cloud/free/
-
Create a gpg key:
mkdir -p ~/.oci openssl rsa -pubout -in ~/.oci/${USER}.pem -out ~/.oci/${USER}_pub.pem
-
Add the public key under Identity > Your User > Api Keys (https://cloud.oracle.com/identity/users/)
-
Copy the credentials summary and create the provider config (e.g.
auth.tf):variable "tenancy_ocid" { default = "<user ocid>" } provider "oci" { tenancy_ocid = "(..)" user_ocid = "(..)" private_key_path = "(private key)" fingerprint = "<..>" region = "(..)" }
terraform initterraform planterraform apply<<<<<<< HEAD =======
just build a new cluster wtih
$ terraform taint oci_core_instance.instance
Resource instance oci_core_instance.instance has been marked as tainted.
$ terraform apply
(...)
Note: Objects have changed outside of Terraform
Terraform detected the following changes made outside of Terraform since the last "terraform apply":
# oci_core_instance.instance has been changed
~ resource "oci_core_instance" "instance" {
+ extended_metadata = {}
id = "ocid1.instance.oc1.uk-london-1.(...)"
# (19 unchanged attributes hidden)
# (7 unchanged blocks hidden)
}
(...)main