a tour of from the ccoommmmaanndd lliinnee€¦ · application options-----namespace: shifter...

A tour of

from the

COMMAND LINECOMMAND LINEfeaturing:

ssh, git, and rhc

bit.ly/1mq7s5h

Command Line OpenShift http://ryanjarvinen.com/presentations/openshift-cli/

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socuteurl.com/widdlepuppytail

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presented by

/ @ryanjryan jarvinen

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Open Source Evangelistat

Red Hat

ryanj@redhat.com

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AGENDAAGENDA1.2.3.4.5.6.

State of the Open CloudrhcsshgitRelease ManagementScaling

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STATE OF THE OPEN CLOUDSTATE OF THE OPEN CLOUD

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HAS IT BEENHAS IT BEEN

LIBERATED?LIBERATED?The OS ✓1.The Cloud ?2.Infrastructure as a service ✓3.Platform as a service ✓4.Software as a service ×5.

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CLOUD AUTOPSYCLOUD AUTOPSY

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OPENSHIFT IS…OPENSHIFT IS…

OPEN SOURCEOPEN SOURCEHOSTING,HOSTING,

BUILD,BUILD,and

AUTO-SCALINGAUTO-SCALINGfor applications

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providing instant access to all of this, and more:

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these technolgies are bundled / made available as

CARTRIDGESCARTRIDGES

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rhc cartridge list

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On OpenShift, your application environment issecurely incapsulated within a 'Gear', providing

guaranteed access to system resources

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using , and CgroupsSELinux

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OPENSHIFT PROVIDES A PEACEFUL ENVIRONMENT FOR DEVS AND SYSADMINS TOOPENSHIFT PROVIDES A PEACEFUL ENVIRONMENT FOR DEVS AND SYSADMINS TOWORK TOGETHER INWORK TOGETHER IN

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Operations care about stability and performanceDevelopers just want environments withoutwaitingAnd neither one wants to have to fight the other toget their work done

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RHCRHCCommand Line OpenShift http://ryanjarvinen.com/presentations/openshift-cli/

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rhc makes it easy for developers to talk to yourOpenShift REST API

PRE-REQUISITES:PRE-REQUISITES:

rubygems, gitsudo gem install rhc

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Will automatically:

authenticate your OpenShift accountverify your local ssh key configurationconfigure your host url identifier

rhc setup

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CREATE AN APPLICATIONCREATE AN APPLICATIONStart by provisioning your application environment

and database in a single step:

for a basic Nodejs and MongoDB application, run:

rhc app create APP_NAME CARTRIDGE CART2 CART3

rhc app create scale12x nodejs-0.10 mongodb-2.2

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<command-line output>Application Options------------------- Namespace: shifter Cartridges: nodejs-0.10, mongodb-2.2 Gear Size: default Scaling: no

Creating application 'scale12x' ... done

Waiting for your DNS name to be available ... done

Downloading the application Git repository ...Cloning into 'scale12x'...

Your application code is now in 'scale12x'

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scale12x @ http://scale12x-shifter.rhcloud.com/ (uuid: 5175981a5973ca7a69000501------------------------------------------------------------- Created: 1:05 PM Gears: 1 (defaults to small) Git URL: ssh://5175981a5973ca7a69000501@scale12x-shifter.rhcloud.com/~/git/scale SSH: 5175981a5973ca7a69000501@scale12x-shifter.rhcloud

nodejs-0.10 (Node.js 0.10) ------------------------ Gears: Located with mongodb-2.2

mongodb-2.2 (MongoDB NoSQL Database 2.2) ---------------------------------------- Gears: Located with nodejs-0.10 Connection URL:mongodb://$OPENSHIFT_MONGODB_DB_HOST:$OPENSHIFT_MONGODB_DB_PORT/ Database Name: scale12x Password: PTk4cCetTj2w Username: admin

RESULT:Application scale12x was created.

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SUCCESS!SUCCESS!You now have a basic node.js and MongoDB skeleton

application live on the Internet!

Your gear is now configured with:

it's own git repoit's own web serverssh accesslogginga databasepublicly accessible hostnames, automatic DNS

http://scale12x-shifter.rhcloud.com/

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Application details are always available via:

You can tail your remote logs with:

or, connect directly to your app via ssh:

rhc app show scale12x

rhc tail scale12x

rhc ssh scale12x

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SSHSSHCommand Line OpenShift http://ryanjarvinen.com/presentations/openshift-cli/

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ENVIRONMENT VARIABLESENVIRONMENT VARIABLESAllow you to write code that will run anywhere

//provide a sensible default for local developmentmongodb_connection_string = 'mongodb://127.0.0.1:27017/' + db_name;//take advantage of openshift env vars when available:if(process.env.OPENSHIFT_MONGODB_DB_URL){ mongodb_connection_string = process.env.OPENSHIFT_MONGODB_DB_URL + db_name;}

//same advice applies for your webserver's PORT and IP addressvar port = process.env.PORT || process.env.OPENSHIFT_NODEJS_PORT || var ip = process.env.OPENSHIFT_NODEJS_IP || '127.0.0.1'

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Application passwords, keys, and secrets can beabstracted using the same technique:

rhc env set SECRET_KEY=0P3N_S0URC3

rhc env list

rhc env help

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Team members can supply their own keys during appcreation, for a single step clone+deploy:

rhc app create scale12x nodejs-0.10 mongodb-2.2 \--from-code=http://github.com/USER/TEAM_REPO.git \--env SECRET_KEY=0P3N_S0URC3

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TEAM COLLABORATIONTEAM COLLABORATIONThere are several ways to collaborate:

using 1.using 2.or, using 3.

github or bitbucketssh keys

OpenShift's new team collaboration tools

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GITGITCommand Line OpenShift http://ryanjarvinen.com/presentations/openshift-cli/

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DEPLOYING UPDATESDEPLOYING UPDATESA standard git development workflow can be used to

rebuild and update your remote application:

Add your changes to a changeset1.

Mark the changeset as a Commit2.

Push the Commit to OpenShift3.

git add index.html

git commit -m 'updating H1'

git push

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Adding cartridges to existing apps is easy:

adds jenkins CI to your application's build cycle

rhc cartridge add jenkins-1

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RELEASE MANAGEMENTRELEASE MANAGEMENT

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RELEASE TRACKING & ROLLBACKSRELEASE TRACKING & ROLLBACKS

Want to deploy a different branch (not 'master')?

rhc deployment show

rhc deployment list

rhc deployment activate CHECKSUM

rhc app configure --deployment-branch MY_BRANCH

https://www.openshift.com/blogs/introduction-to-deployments-and-rollbacks-on-openshift

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TIPS FOR LOCAL DEVELOPMENTTIPS FOR LOCAL DEVELOPMENTUse port-forwarding to create a local connection to

your remote database instance:

Starting a local webserver is different in each language.For nodejs, you can start a local server with:

rhc port-forward scale12

npm install

npm start

https://www.openshift.com/blogs/set-up-local-access-to-openshift-hosted-services-with-port-

forwarding

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SCALINGSCALINGCommand Line OpenShift http://ryanjarvinen.com/presentations/openshift-cli/

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Spinning up an auto-scaling Linux environment:

just add "-s" to your app create command

rhc app create scale12 -s nodejs-0.10 mongodb-2.2

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Set a min and max scale

or, manually scale an application

rhc cartridge scale nodejs-0.10 -a scale12 --min 2 --max 12

rhc app scale-up

rhc app scale-down

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From inside a hosted environment:

HAProxy on / off switches

haproxy_ctld --up

haproxy_ctld --down

haproxy_ctld_daemon start

haproxy_ctld_daemon stop

haproxy_ctld_daemon restart

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GENERATING LOADGENERATING LOADFor scalable applications, generate load from thecommand line to see automatic scaling in action:while true ; do ab -n 1000 -c 50 https://scale12-shifter.rhcloud.com/ ; done

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HAPROXY WEB UIHAPROXY WEB UIhttp://$YOUR_APP_DNS/haproxy-status/

HAPROXY RAW DATAHAPROXY RAW DATAhttp://$YOUR_APP_DNS/haproxy-status/;csv

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QUESTIONS?QUESTIONS?Command Line OpenShift http://ryanjarvinen.com/presentations/openshift-cli/

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WANT TO LEARN MORE?WANT TO LEARN MORE?Come hang out with us on IRC:

Link to these slides:

Free hosting on OpenShift: OpenShift source code: Red Hat Enterprise Support:

presented by:

/ @ryanjryan jarvinen

http://socuteurl.com/widdlepuppytailOpenShift Online

OpenShift OriginOpenShift Enterprise

#openshift on Freenode

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