@pubcore/docker-cluster-test

package to create a (local) docker swarm cluster for testing

This package can be used for scripts (js) to create a docker swarm cluster as a foundation for testing of services dealing with distributed data. Testing the behaviour of distributed-data-services, for instance, if a node goes down, leads to the motivation for this package: create a test-cluster, deploy a service, create some test-load and in parallel shoot down a node.

Prerequisites

• Mac, Linux, Windows 7 and 8
• docker, docker-machine (https://docs.docker.com/machine/install-machine/)
• virtualbox
• nodejs

Example

'use strict'
const {installCluster, purgeCluster, isReady, getVmIp
	} = require('@pubcore/docker-cluster-test'),
	{deploy} = require('@pubcore/node-docker-build')

//this will lead to 2 virtual machines with name vm1 and vm2
vmSet = {name:'vm', count:2}

//shortcut for  createVms(vmSet), startVms(vmSet) and createSwarm(vmSet)
installCluster(vmSet)

//helper function to deploy an example service (via ssh to the test-cluster)
deploy({
	moduleName:resolve(__dirname, '../localhost/config'),
	logPath:resolve(__dirname)
})

//if test-service is ready on vm2, do some-thing, here - for instance - cleanup
isReady({host:getVmIp(vmSet), port:8080}).then(() => {

	//purge stuff, shortcut for stopVms(vmSet) and deleteVms(vmSet)
	purgeCluster(vmSet)
},

References

docker swarm tutorial.