test/

This directory contains integration tests for weave.

Requirements

You need three VMs with docker (>=1.10.0) installed and listening on TCP port 2375 (see below). You also need to be able to SSH to these VMs without having to input anything.

The Vagrantfile in this directory constructs three such VMs.

If you are building Weave Net using Vagrant, it is recommended to run the tests from the build VM and not the host.

NOTE WELL The number of hosts required by a test must be specified in the test name. For example, 000_some_test.sh will use one host, while 001_some_other_3_test.sh will use three hosts. The number of hosts must be the last part of the test name before the _test.sh prefix. See /tools/runner/runner.go for details

Running tests locally using VMs

TL;DR: You can run the steps 2. to 7. below with one command:

make PROVIDER=vagrant integration-tests

Detailed steps:

1. Start the build virtual machine (see above article for more details):

   vagrant up
   

2. Start the three testing VMs:

   cd test
   vagrant up
   

3. SSH into the build VM and go to Weave Net's sources:

   cd ..
   vagrant ssh
   # you are now on the build VM:
   cd ~/weave 
   

4. Compile all code and dependencies:

   make
   make testrunner
   cd test
   

5. Upload the weave images from where the Makefile puts them (weave.tar.gz) to the three docker hosts, docker load these, and copies the weave script over:

   ./setup.sh
   

6. Run individual tests, e.g.:

   ./200_dns_test.sh
   

   or run all tests (everything named *_test.sh):

   ./run_all.sh
   

7. Stop all VMs:

   exit
   # you are now on your host machine
   vagrant destroy -f
   cd test
   vagrant destroy -f
   

Using other VMs

By default the tests assume the Vagrant VMs are used.

To use other VMs, set the environment variable HOSTS to the space-separated list of IP addresses of the docker hosts, and set the environment variable SSH to a command that will log into either (which may just be ssh).

Making docker available over TCP

To make docker listen to a TCP socket, you will usually need to either run it manually with an option like -H tcp://0.0.0.0:2375; or, for apt-get installed docker (Ubuntu and Debian), add the line

DOCKER_OPTS="--host unix:///var/run/docker.sock --host tcp://0.0.0.0:2375"

to the file /etc/default/docker, then restart docker.

Updating the GCE test image

When a new version of Docker is released, you willneed to update the GCE test image. To do this, change the Docker version in run-integration-tests.sh and push the change. Next build in CircleCI will detect that there is no template for this version of Docker and will first create the template before running tests. Subsequent builds will then simply re-use the template.

Running the tests on a cloud provider

Running the tests against a remote provider instead of local vagrant VMs is a little more involved, and reproduces the environment used for CI. It is recommended that you use the build VM to coordinate the build phase. Make sure you have a recent version of ansible installed, terraform will fail to provision the VMs.

1. Create the build VM in the repository root and log in

   # On your development machine
   $ vagrant up
   $ vagrant ssh
   

2. Once in the build vm, install the gcloud tools as per the documentation. You need to do this manually as the circleCI VMs are already provisioned with gcloud.

   # On the build VM
   $ curl https://sdk.cloud.google.com | bash
   $ exec -l $SHELL
   

   You don't need to initialise the gcloud tools by running gcloud init.

3. Export the secret key needed to decrypt the cloud credentials - This assumes you're using the build tools

   # On the build VM
   $ export SECRET_KEY="XXXXXXXXXX"
   

4. Navigate to the test directory and provision the VMs

   # On the build VM
   $ cd weave/test
   /weave/test$ ./run-integration-tests.sh up
   

5. Run the tests you need

   # On the build VM
   /weave/test$ export TESTS="./090_docker_restart_policy_2_test.sh" 
   /weave/test$ ./run-integration-tests.sh test
   

6. Don't forget to close down your remote VMs when you're done

   # On the build VM
   /weave/test$ ./run-integration-tests.sh destroy
   

7. And switch off your build VM

   # On the build VM
   /weave/test$ exit
   
   # On your development machine
   $ vagrant destroy -f 
   # or "vagrant suspend" if you want to preserve the machine state