groovy devops in the cloud for devopsdays in ljubljana 2014
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Groovy DevOps in theCloud
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About me02
Andrey Adamovich
Bio: Developer, coach, speaker, author
Company: Aestas/IT (http://aestasit.com)
E-mail: andrey@aestasit.com
Linkedin: http://www.linkedin.com/in/andreyadamovich
Twitter: @aestasit
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What's this presentation about?
Our take on:
DevOps
Server Provisioning
Continuous Integration
Continuous Delivery
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Technologies
AWS - http://aws.amazon.com
Groovy - http://groovy.codehaus.org
Gradle - http://gradle.org
Jenkins - http://jenkins-ci.org
Puppet - http://puppetlabs.com
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Developers +Operations =
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Silos
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Conflicts08
Risk
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Agile
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What is DevOps?
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It's not abouttools!
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It's aboutculture and
process!13
But withouttools...
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...it'sdefinitelyharder!
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DevOps implyautomation!
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DevOps implystructure!
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Infrastructure as Code
Automate the provisioning and maintenance of servers:
Build from source control
Utilize Open Source tools
Ensure testability
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Configuration propagation
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Changes
No Manual Changes!
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Building an automation toolkit
Automation is key
We are JVM hackers
Fragmented ecosystem
Full-stack approach
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Sshoogr
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Sshoogr Features
Remote command execution
File uploading/downloading
Tunneling
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Sshoogr Example I
remoteSession {
url = 'user2:654321@localhost:2222'
exec 'rm -rf /tmp/*'
exec 'touch /var/lock/my.pid'
remoteFile('/var/my.conf').text = "enabled=true"
}
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Sshoogr Example II
remoteSession {
scp {
from { localDir "$buildDir/application" }
into { remoteDir '/var/bea/domain/application' }
}
}
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Sshoogr Example III
def result = exec(command: '/usr/bin/mycmd',
failOnError: false, showOutput: false)
if (result.exitStatus == 1) {
result.output.eachLine { line ->
if (line.contains('WARNING')) {
throw new RuntimeException("Warning!!!")
}
}
}
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Why Groovy?
Groovy is perfect choice for scripting
Very mature, concise syntax
Extremely easy to produce DSL
We wrote a book about it!
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Shameless plug
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Puppet29
Why Puppet?
More mature than competition
Large community
Readable DSL
No need to learn Ruby ;)
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Continuous Integration
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Why Jenkins?
De-facto standard
Stable
There is a plugin for that!
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Gradle33
Gradle Example I
task uploadModules << {
remoteSession {
exec 'rm -rf /tmp/repo.zip'
scp {
from { localFile "${buildDir}/repo.zip" }
into { remoteDir "/root" }
}
...
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Gradle Example I
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exec 'rm -rf /etc/puppet/modules'
exec 'unzip /tmp/repo.zip -d /etc/puppet/modules'
}
}
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Gradle Example II
task puppetApply(dependsOn: uploadModules) << {
remoteSession {
scp {
from { localFile "${buildDir}/setup.pp" }
into { remoteDir "/tmp" }
}
exec 'puppet apply /tmp/setup.pp'
}
}
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In the meanwhile...
We started developing complex Puppet modules
Modules needs proper testing
...on different platforms
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Do you test, right?
How to test this stuff?
How to reuse a JUnit approach to testing?
We wanted things to be SIMPLE!
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PuppetUnit
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PUnit
Simple testing tool for verifying remote server state
Uses sshoogr and JUnit
Reuse reporting features of JUnit and Jenkins
As simple as ...
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PUnit Example I
class DerbyInstallTest
extends BasePuppetIntegrationTest {
@Before
void installDerby() {
apply("include derby")
}
...
}
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PUnit Example II
@Test
def void ensureDerbyRunning() {
command('service derby status > derbystatus.log')
assertTrue fileText("/root/derbystatus.log")
.contains('Derby')
assertTrue fileText("/root/derbystatus.log")
.contains('is running.')
}
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PUnit Example III
@Test
def void ensureCanConnect() {
Thread.sleep(10000)
uploadScript()
command('/opt/derby/db-derby-10.9.1.0-bin/bin/ij ' +
'testDataScript.sql > derbytest.log')
...
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PUnit Example III
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// Check if the log of the insert
// operation contains the word ERROR.
assertFalse(
"The script should return at least one error",
fileText("/root/derbytest.log")
.contains('ERROR')
)
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PUnit Example III
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// Check on data that was inserted into a table.
assertTrue(
"The log should contain a SELECT result",
fileText("/root/derbytest.log")
.contains('Grand Ave.')
)
}
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PUnit
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More examples
session {
tunnel ('127.0.0.1', 8080) { int localPort ->
// Login to Jenkins.
def driver = new HtmlUnitDriver(false)
driver.manage().timeouts().pageLoadTimeout(300, TimeUnit.SECONDS).implicitlyWait(30, TimeUnit.SECONDS)
driver.get("http://127.0.0.1:${localPort}/login")
...
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More examples
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def input = driver.findElement(By.name('j_username'))
input.sendKeys('john')
input = driver.findElement(By.name('j_password'))
input.sendKeys('123456')
input.submit()
...
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More examples
...
// Verify login.
def wait = new WebDriverWait(driver, 30)
wait.until ExpectedConditions.presenceOfElementLocated (By.linkText('John Doe'))
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}
}
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More examples
session {
tunnel ('127.0.0.1', 80) { int localPort ->
// Initilize repository connection data.
DAVRepositoryFactory.setup()
def url = SVNURL.create('http', null, '127.0.0.1', localPort, 'repos/cafebabe', true)
def repository = SVNRepositoryFactory.create(url)
println "Verifying SVN repository at ${url}"
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More examples
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// Setup credentials.
def authManager = SVNWCUtil.createDefaultAuthenticationManager('joe', '123456')
repository.setAuthenticationManager(authManager)
// Verify repository is at revision 0.
assertEquals 0, repository.getLatestRevision()
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More examples
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// Commit first revision.
ISVNEditor editor = repository.getCommitEditor("Initial commit.", null)
editor.with {
openRoot(-1)
addFile('dummy.txt', null, -1)
applyTextDelta('dummy.txt', null)
def deltaGenerator = new SVNDeltaGenerator()
...
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More examples
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def checksum = deltaGenerator.sendDelta('dummy.txt', new ByteArrayInputStream("data".getBytes()), editor, true)
closeFile('dummy.txt', checksum)
def commitInfo = closeEdit()
println commitInfo
}
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More examples
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// Verify repository is at revision 1 now.
assertEquals 1, repository.getLatestRevision()
}
}
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Nextproblem?
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Scalability
How do we test on different OS?
How do we run parallel tests on multiple architectures?
How do we avoid selling our houses?
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Amazon WebServices
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Elastic Compute Cloud
Mature
Great API
Virtual hardware variety
OS variety
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Gramazon
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Gramazon
Groovy based API for interacting with EC2
Integrates with the rest of the stack
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Gramazon Example I
task startInstance(type: StartInstance) {
keyName 'cloud-do'
securityGroup 'cloud-do'
instanceName 'gramazon/cloud-do'
stateFileName 'cloud-do.json'
ami 'ami-6f07e418'
instanceType 't1.micro'
waitForStart true
}
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Gramazon Example II
task terminateInstance(type: TerminateInstance) {
stateFileName 'cloud-do.json'
}
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Imgr
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Imgr
A tool for building images
Inspired by Packer
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Images?
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Supports
Shell
Puppet
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Configuration Example
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The flow
Start instance(s)
Upload manifests
Run tests
Generate report
Terminate instance(s)
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Images, manifests, tasks
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The big picture
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Aetomation
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Conclusions
Reuse your existing Java knowledge
...to build a bridge between DEVs and OPs
Reuse development best practices for OPs
Don't be afraid to try new technologies
Automate!
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One morething...
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It's all OpenSource!
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Source code
Sshoogr: https://github.com/aestasit/sshoogr
Sshoogr Gradle: https://github.com/aestasit/sshoogr-gradle
PUnit: https://github.com/aestasit/puppet-unit
Gramazon: https://github.com/aestasit/gramazon
Imgr: https://github.com/aestasit/imgr
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Seekingcontributors!
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Questions?77
Hvala! Thank you!
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