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89 lines
4.3 KiB
89 lines
4.3 KiB
# End-to-End (E2E) Tests
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E2E tests cover multi-node K3s configuration and administration: bringup, update, teardown etc. across a wide range of operating systems. E2E tests are run nightly as part of K3s quality assurance (QA).
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## Framework
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End-to-end tests utilize [Ginkgo](https://onsi.github.io/ginkgo/) and [Gomega](https://onsi.github.io/gomega/) like the integration tests, but rely on [Vagrant](https://www.vagrantup.com/) to provide the underlying cluster configuration.
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Currently tested operating systems are:
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- [Ubuntu 20.04](https://app.vagrantup.com/generic/boxes/ubuntu2004)
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- [Leap 15.3](https://app.vagrantup.com/opensuse/boxes/Leap-15.3.x86_64) (stand-in for SLE-Server)
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- [MicroOS](https://app.vagrantup.com/dweomer/boxes/microos.amd64) (stand-in for SLE-Micro)
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## Format
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All E2E tests should be placed under `tests/e2e/<TEST_NAME>`.
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All E2E test functions should be named: `Test_E2E<TEST_NAME>`.
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A E2E test consists of two parts:
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1. `Vagrantfile`: a vagrant file which describes and configures the VMs upon which the cluster and test will run
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2. `<TEST_NAME>.go`: A go test file which calls `vagrant up` and controls the actual testing of the cluster
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See the [validate cluster test](../tests/e2e/validatecluster/validatecluster_test.go) as an example.
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## Setup
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To run the E2E tests, you must first install the following:
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- Vagrant
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- Libvirt
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- Vagrant plugins
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### Vagrant
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Download the latest version (currently 2.2.19) of Vagrant [*from the website*](https://www.vagrantup.com/downloads). Do not use built-in packages, they often old or do not include the required ruby library extensions necessary to get certain plugins working.
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### Libvirt
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Follow the OS specific guides to install libvirt/qemu on your host:
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- [openSUSE](https://documentation.suse.com/sles/15-SP1/html/SLES-all/cha-vt-installation.html)
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- [ubuntu 20.04](https://ubuntu.com/server/docs/virtualization-libvirt)
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- ubuntu 22.04:
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```bash
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sudo apt install ruby-libvirt qemu libvirt-daemon-system libvirt-clients ebtables dnsmasq-base libxslt-dev libxml2-dev libvirt-dev zlib1g-dev ruby-dev libguestfs-tools
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```
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- [debian](https://wiki.debian.org/KVM#Installation)
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- [fedora](https://developer.fedoraproject.org/tools/virtualization/installing-libvirt-and-virt-install-on-fedora-linux.html)
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### Vagrant plugins
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Install the necessary vagrant plugins with the following command:
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```bash
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vagrant plugin install vagrant-libvirt vagrant-scp vagrant-k3s vagrant-reload
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```
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### Kubectl
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For linux
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```bash
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curl -LO "https://dl.k8s.io/release/$(curl -L -s https://dl.k8s.io/release/stable.txt)/bin/linux/amd64/kubectl"
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sudo install -o root -g root -m 0755 kubectl /usr/local/bin/kubectl
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```
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If it does not work, or you are on a different system, check the [official tutorial](https://kubernetes.io/docs/tasks/tools/install-kubectl-linux/)
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## Running
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Generally, E2E tests are run as a nightly Jenkins job for QA. They can still be run locally but additional setup may be required. By default, all E2E tests are designed with `libvirt` as the underlying VM provider. Instructions for installing libvirt and its associated vagrant plugin, `vagrant-libvirt` can be found [here.](https://github.com/vagrant-libvirt/vagrant-libvirt#installation) `VirtualBox` is also supported as a backup VM provider.
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Once setup is complete, all E2E tests can be run with:
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```bash
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go test -timeout=15m ./tests/e2e/... -run E2E
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```
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Tests can be run individually with:
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```bash
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go test -timeout=15m ./tests/e2e/validatecluster/... -run E2E
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#or
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go test -timeout=15m ./tests/e2e/... -run E2EClusterValidation
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```
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Additionally, to generate junit reporting for the tests, the Ginkgo CLI is used. Installation instructions can be found [here.](https://onsi.github.io/ginkgo/#getting-started)
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To run the all E2E tests and generate JUnit testing reports:
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```
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ginkgo --junit-report=result.xml ./tests/e2e/...
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```
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Note: The `go test` default timeout is 10 minutes, thus the `-timeout` flag should be used. The `ginkgo` default timeout is 1 hour, no timeout flag is needed.
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# Debugging
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In the event of a test failure, the cluster and VMs are retained in their broken state. Startup logs are retained in `vagrant.log`.
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To see a list of nodes: `vagrant status`
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To ssh into a node: `vagrant ssh <NODE>`
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Once you are done/ready to restart the test, use `vagrant destroy -f` to remove the broken cluster. |