Shoot automated and repeatable tests to validate the behaviour of resource agents in Pacemaker-based clusters.
The tests are built on Pacemaker's Cluster Test Suite framework. We use CTS for setup, cluster communication, audit, reporting... and add our own RA scenarios on top of that.
ra-tester is meant to be run from a host which is not part of the
cluster. It uses pipenv to install
dependencies into an isolated virtual env from where you can run the
resource agents' tests. It also relies on CTS, which requires some
additional steps to set up due to it being unavailable in PyPI yet.
pip install pipenv
PIPENV_VENV_IN_PROJECT=1 pipenv --three install
pipenv run setup/install-cts.py
Once the setup is complete, you can run pipenv shell to jump
on the create virtualenv and run the ra-tester command.
On the cluster nodes, ra-tester will automatically install the
required packages based on the tests that you want to run, so no
particular setup is required.
If you want to host your cluster on VMs, a helper script
ra-tester-build-vms is available and its usage is explained below.
ra-tester has fairly small hardware requirements, a 3-node setup
with 1 CPU and 2GB of RAM per machine is sufficient to run the majority
of the test cases.
It is expected that the pacemaker cluster run on a network without DHCP, to prevent any network issue caused by lease renewal.
To run the entire test suite, a fencing device must be available so that pacemaker can shutdown or restart nodes as expected in the face of resource monitoring failures or network conditions.
A helper script ra-tester-build-vms is provided so that you can
bootstrap a VM-based 3-nodes cluster from any Linux distribution:
pipenv run ./ra-tester-build-vms --img ./CentOS-7-x86_64-GenericCloud.qcow2 --name ratester
The example above will create three CentOS-based VM ratester1,
ratester2 and ratester3, with networking and fencing set up
according to ra-tester requirements.
The tests which are run by ra-tester are meant to be repeatable,
so they need to re-create an entire cluster and all its resources
at every run. Consequently, be aware any existing pacemaker cluster
running on the target nodes that you provide will be destroyed and
replaced by a cluster suitable for ra-tester.
Alternatively, in order to ease development, it is still possible
to configure ra-tester to re-use an existing pacemaker cluster.
Still, the resource running on the cluster will be destroyed and
recreated from scratch at every run.
List available tests with:
./ra-tester --nodes 'node1 node2 node3' --list
Run the whole series of tests with:
./ra-tester --nodes 'node1 node2 node3'
Shoot specific tests and raise ra-tester verbosity to see the
cluster commands ran during the test with:
./ra-tester --nodes 'node1 node2 node3' --choose Galera:SimpleSetup:ClusterStart,Galera:SimpleSetup:ClusterStop --set verbose=1
Keep existing pacemaker cluster when shooting tests:
./ra-tester --nodes 'node1 node2 node3' --set verbose=1 --set keep_cluster=1
This program is free software: you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License along with this program. If not, see http://www.gnu.org/licenses/.