Getting Started with Juju

These are the slides for the intro to using juju talk. This covers basic deployment, inspection, and environment setup - which are considered first steps in the exploration process.

These core concepts are pre-requisites to doing any level of charming with Juju. - which is building the charms themselves to deploy your software into the orchestrated cloud.

Transcript

1. Getting Started with Juju
2. Charles Butler @lazypower
3. Juju's Goal
4. Encapsulate ops knowledge in any cloud environment: public or private
5. To provide a dynamic infrastructure With interchangeable services
6. So you can focus on being an expert in using the service, not on deployment and life cycle management.
7. Whats the Model?
8. Juju's Model • Server / Client • Written in GO • TLS Encrypted Hypermedia Socketed API • Event Driven
9. Charms are Building Blocks
10. Charms • Configuration Management • Service Relationships • Expose proper usage patterns through relations • Service Lifecycle Management
11. Bundles • Contain one or many charms • (Re-)distributable • Simple YAML files • Orchestration out of the box
12. Interactive Tutorial
13. Installation (Ubuntu) https://jujucharms.com/get-started add-apt-repository ppa:juju/stable apt-get update apt-get install juju juju-local juju-quickstart
14. Installation (OSX) For client only: • brew install juju juju-quickstart For development (the next session): adopt the vagrant workflow: • https://juju.ubuntu.com/docs/config-vagrant.html
15. Installation (Windows) For the core client: • Visit: https://juju.ubuntu.com/install/ • Sadly, no juju-quickstart Better Yet – Fetch the Vagrant Image!
16. Vagrant Box Installation
17. Quick Steps vagrant box import jujubox.box --name jujubox vagrant init jujubox vagrant up
18. Final Notes on Installation https://jujucharms.com/get-started • All Major Platforms have the client for use in production. • Development efforts are in Vagrant / Containers. • More info at http://juju.ubuntu.com/install
19. Generate Configuration juju generate-config Config lives in: ~/.juju/environments.yaml
20. Environments.yaml local: type: local admin-secret: foobar default-series: trusty amazon: type: ec2 region: eu-central-1 access-key: 'XXX' secret-key: 'XXX' control-bucket: cfgmgmtcamp-juju-## admin-secret: foobar default-series: trusty
21. Set your environment Juju switch amazon - or - Juju switch local $ juju switch local amazon -> local
22. Bootstrap juju bootstrap
23. Whats this doing? (Cloud) • Communicates with cloud provider API • Provisions a machine, and pre-loads it with JUJU stateserver components • Provides an API endpoint for enlistment • Warehouses SSH keys / Users (coming in 1.22)
24. Whats this doing? (Local) • Fires up a few components on your desktop – MongoDB – StateServer API – Components/logs are found in ~/.juju/local/
25. Lets deploy something! juju quickstart bundle:mediawiki/7/single juju set mysql dataset-size='20%' The mysql config option is a fix for local provider in vagrant. We don't have much ram, and this will cause mysql to fail to come up during deployment. good for prod, not for this use case.
26. What's this doing? (Cloud) • Communicating with cloud provider API • Provision a machine • Enlist in Juju StateServer • Shipping charm code to the unit • Runs hooks according to events
27. What's this doing? (Local) • Provisioning a new LXC Container – If the templates don't exist, it fetches the template(s). – This only happens once, for each series you deploy • Enlist container in Juju StateServer • Shipping charm code to the unit • Runs hooks according to events
28. See it in the CLI juju status If you need up to the minute information: watch juju status
29. See it visually juju deploy juju-gui juju deploy juju-gui --to 0 juju expose juju-gui The --to co-locates the gui on the state server to keep machines at a minimum
30. Configure Services juju set mediawiki name='Configuration Management Camp 2015' You can do this in the GUI by clicking:
31. Reset and Deploy Manually
32. Destroy Services juju destroy-service mediawiki juju destroy-service mysql juju destroy-machine 1 juju destroy-machine 2 Why destroy-service AND destroy-machine? Juju leaves machines behind in the event You need to do data recovery!
33. Deploy Manually juju deploy cs:trusty/mediawiki juju deploy cs:trusty/mysql juju set mysql dataset-size='20%'
34. Extend with a reverse proxy Juju deploy cs:trusty/haproxy Juju add-relation haproxy mediawiki
35. Congratulations! You're now a Juju Padewon!
36. Charles Butler @lazypower Questions? http://jujucharms.com irc.freenode.net #juju juju@lists.ubuntu.com