# Rook Test Framework

The Rook Test Framework is used to run end to end and integration tests on Rook. The framework depends on a running instance of Kubernetes.
The framework also provides scripts for starting Kubernetes using `kubeadm` or `minikube` so users can
quickly spin up a Kubernetes cluster.The Test framework is designed to install Rook, run tests, and uninstall Rook.

## Requirements
1. Docker version => 1.2 && < 17.0 (for other alternatives, see below)
1. Ubuntu 18 (the framework has only been tested on this version)
1. kernel >= 4.15
1. Kubernetes with kubectl configured
1. Rook

## Instructions

## Setup

### Container Runtime

By default, the test suite tries to use the `docker` command line tool. To use
an alternative container runtime tool, set the `DOCKERCMD` environment variable
to your command line tool of choice.

### Install Kubernetes
You can choose any Kubernetes flavor of your choice.  The test framework only depends on kubectl being configured.
The framework also provides scripts to install Kubernetes. There are two scripts to start the cluster:
1. **Kubeadm** (recommended for Ubuntu): run [kubeadm.sh](/tests/scripts/kubeadm.sh) to setup a single-node K8s cluster using kubeadm
1. **Minikube** (recommended for non-Ubuntu): Run [minikube.sh](/tests/scripts/minikube.sh) to setup a single-node Minikube Kubernetes.

Minikube scripts only support "docker" and "none" as vm-driver.

#### Minikube (recommended for non-Ubuntu)
Starting the cluster on Minikube is as simple as running:
```console
tests/scripts/minikube.sh up
```

To copy Rook images generated from your local build into the Minikube VM, run the following commands after `minikube.sh up` succeeded:
```console
tests/scripts/minikube.sh update
tests/scripts/minikube.sh helm
```

Stopping the cluster and destroying the Minikube VM can be done with:
```console
tests/scripts/minikube.sh clean
```

#### Kubeadm (recommended for Ubuntu)
Starting the cluster using `kubeadm` is as simple as running:
```console
tests/scripts/kubeadm.sh up
```

`kubeadm.sh` starts Kubernetes on the host, so all the images generated by your local build should be available to the cluster without any additional commands.
You can change the Kubernetes version (default is v1.15.12) with `KUBE_VERSION` environment variable. Here is the example of using Kubernetes v1.19.0.

```console
export KUBE_VERSION=v1.19.0
tests/scripts/kubeadm.sh up
```

Please note that this script may downgrade the following deb packages.

- kubernetes-cni
- kubelet
- kubeadm

Stopping the cluster can be done with:
```console
tests/scripts/kubeadm.sh clean
```

#### Alternate Kubernetes Versions
These two scripts can install any version of Kubernetes you wish based on the `KUBE_VERSION` environment variable.
To use an alternate version, simply set this variable before running the relevant `up` command from above.
For example, if you wanted to use `v1.12.5`, you would run `export KUBE_VERSION=v1.12.5` first before running `up`.

### Install Helm
Use [helm.sh](/tests/scripts/helm.sh) to install Helm and set up Rook charts defined under `_output/charts` (generated by build):

- To install and set up Helm charts for Rook run `tests/scripts/helm.sh up`.
- To clean up `tests/scripts/helm.sh clean`.

**NOTE:** `*kubeadm.sh`, `minikube.sh` and `helm.sh` scripts depend on some artifacts under the `_output/` directory generated during build time,
these scripts should be run from project root. e.g., `tests/script/kubeadm.sh up`.

**NOTE**: If Helm is not available in your `PATH`, Helm will be downloaded to a temporary directory (`/tmp/rook-tests-scripts-helm`) and used from that directory.

## Run Tests
From the project root do the following:

### 1. Build rook:
Run `make build`

### 2. Start Kubernetes
Using one of the following:

- Using Kubeadm
```
tests/scripts/kubeadm.sh up
export KUBECONFIG=~/admin.conf
tests/scripts/helm.sh up
```
- Using minikube
```
tests/scripts/minikube.sh up
tests/scripts/minikube.sh helm
tests/scripts/helm.sh up
```

### 3. Run integration tests:

Some settings are available to run the tests under different environments. The settings are all configured with environment variables.
See [environment.go](/tests/framework/installer/environment.go) for the available environment variables.
At least you should set the following variables.

```console
export TEST_HELM_PATH=/tmp/rook-tests-scripts-helm/linux-amd64/helm
export TEST_BASE_DIR=WORKING_DIR
export TEST_SCRATCH_DEVICE=<block device> # for example, TEST_SCRATCH_DEVICE=/dev/sdb
```

Please note that the integration test erases the contents of TEST_SCRATCH_DEVICE.

To run all integration tests:
```console
go test -v -timeout 7200s github.com/rook/rook/tests/integration
```

In addition, you can choose to test only one storage provider. For example, you can run Ceph tests as follows.

```console
export STORAGE_PROVIDER_TESTS=ceph
go test -v -timeout 7200s github.com/rook/rook/tests/integration
```

To run a specific suite (uses regex):
```console
go test -v -timeout 1800s -run CephSmokeSuite github.com/rook/rook/tests/integration
```

To run specific tests inside a suite:
```console
go test -v -timeout 1800s -run CephSmokeSuite github.com/rook/rook/tests/integration -testify.m TestARookClusterInstallation_SmokeTest
```

### To run tests on OpenShift environment

- Setup OpenShift environment and export KUBECONFIG before executing the tests.
- Make sure `oc` executable file is in the PATH.
- Only `CephSmokeSuite` is currently supported on OpenShift.
- Set few environment variables:
```
export TEST_ENV_NAME=openshift
export TEST_STORAGE_CLASS=gp2
export TEST_BASE_DIR=/tmp
export RETRY_MAX=40
```

To run a `CephSmokeSuite` (uses regex):
```console
$ go test -v -timeout 1800s -run CephSmokeSuite github.com/rook/rook/tests/integration
```