tests/

README

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)
2. Ubuntu 16 (the framework has only been tested on this version)
3. Kubernetes with kubectl configured
4. 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. Minikube (recommended for MacOS): Run minikube.sh to setup a single-node Minikube Kubernetes.
2. Kubeadm (recommended for Ubuntu): run kubeadm.sh to setup a single-node K8s cluster using kubeadm

Minikube (recommended for MacOS)

Starting the cluster on Minikube is as simple as running:

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:

tests/scripts/minikube.sh update
tests/scripts/minikube.sh helm

Stopping the cluster and destroying the Minikube VM can be done with:

tests/scripts/minikube.sh clean

Kubeadm (recommended for Ubuntu)

Starting the cluster using kubeadm is as simple as running:

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.

Stopping the cluster can be done with:

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 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. The temporary directory the Helm binary is in needs to be given to the integration binary calls. The flag for that is --helm=HELM_BINARY, e.g., --helm=/tmp/rook-tests-scripts-helm/linux-amd64/helm.

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
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:

Integration tests can be run using tests binary _output/tests/${platform}/integration that is generated during build time e.g.:

~/integration -test.v

Test parameters

In addition to standard go tests parameters, the following custom parameters are available while running tests:

Parameter	Description	Possible values	Default
rook_platform	platform Rook needs to be installed on	kubernetes	kubernetes
k8s_version	version of Kubernetes to be installed	v1.10+	v1.13.1
rook_image	Rook image name to be installed	valid image name	rook/ceph
skip_install_rook	skips installing Rook (if already installed)	true or false	false

Running Tests with parameters.

To run all integration tests run

go test -v -timeout 1800s github.com/rook/rook/tests/integration

To run a specific suite (uses regex)

go test -v -timeout 1800s -run SmokeSuite github.com/rook/rook/tests/integration

To run specific tests inside a suite:

go test -v -timeout 1800s -run SmokeSuite github.com/rook/rook/tests/integration -testify.m TestRookClusterInstallation_SmokeTest

To run specific without installing rook

go test -v -timeout 1800s -run SmokeSuite github.com/rook/rook/tests/integration --skip_install_rook

If the skip_install_rook flag is set to true, then Rook is not uninstalled either.

Run Longhaul Tests

Longhaul tests are integration tests that run for extended period of time. A load profile can be configured using the following load test flags

Parameter	Description	Possible values	Default
load_parallel_runs	performs concurrent operations	any number	20
load_volumes	number of volumes	>1	1
load_time	number of seconds to run	>1	1800
load_size	size of load profile (3M, 10M, or 50M per thread)	small, medium, or large	medium
enable_chaos	kill random pods in Rook cluster	true or false	false

e.g.

go test -run TestObjectLongHaul github.com/rook/rook/tests/longhaul --load_parallel_runs=20 --load_time 1800 --load_size small --load_volumes 3

The longhaul test just like other test is going to install Rook if it's not already installed, but it is not going to clean up test data or uninstall Rook after the run. Longhaul test is designed to run multiple times on the same setup and installation of Rook to tests its stability. Test data and Rook should be cleaned up manually after the test.

You can measure memory, CPU, IOPS, throughput, and other settings on a cluster using Prometheus. The metrics collected during load test can be visualize using Grafana. Here a couple of helpful links to get prometheus and grafana started and collect metrics: kube-prometheus and cluster-deploy-script

Prerequisites:

• Go installed and GO_PATH set
• Dep installed
• Wget installed
• When running tests locally, make sure kubectl is accessible globally in your PATH as the test framework uses kubectl