https://github.com/jtopjian/grizzly-docker

OpenStack Docker driver on Grizzly
https://github.com/jtopjian/grizzly-docker

Last synced: 4 days ago
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OpenStack Docker driver on Grizzly

• Host: GitHub
• URL: https://github.com/jtopjian/grizzly-docker
• Owner: jtopjian
• Created: 2013-09-26T13:57:48.000Z (about 11 years ago)
• Default Branch: master
• Last Pushed: 2013-09-26T14:08:09.000Z (about 11 years ago)
• Last Synced: 2023-03-23T03:01:27.588Z (over 1 year ago)
• Language: Python
• Size: 121 KB
• Stars: 3
• Watchers: 3
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
Docker Driver on Grizzly

========================

This repository contains files and instructions to get the [OpenStack Docker driver](https://wiki.openstack.org/wiki/Docker) working on Grizzly.

*Notes*:

 * This is not official OpenStack code. This is simply something I was tinkering with was able to successfully get working in my environment.

 * I'm using `nova-network` and `VlanManager` so the networking changes are specific toward that type of configuration.

Files

-----

* `driver.py` needs to replace the `nova/virt/docker/driver.py` file. A patch is included to more clearly see the changes that were made.

* `images.py` needs to replace the `glance/api/v1/images.py` file. A patch is also included.

Getting Docker to Work

----------------------

The above-linked wiki entry does a great job at explaining how this driver works. In addition, I found the following resources helpful:

* [Installing Docker](http://docs.docker.io/en/latest/installation/ubuntulinux/)

* [hypervisor-docker](https://github.com/openstack-dev/devstack/blob/master/lib/nova_plugins/hypervisor-docker): especially the [part](https://github.com/openstack-dev/devstack/blob/master/lib/nova_plugins/hypervisor-docker#L95-L100) where it shows how to launch the Docker registry and have it communicate with Glance.

* [install_docker.sh](https://github.com/openstack-dev/devstack/blob/master/tools/docker/install_docker.sh): supplemental installation info.

* [docker.sh](https://github.com/openstack-dev/devstack/blob/master/exercises/docker.sh): Launching a docker container in OpenStack.

Host Aggregates

---------------

By creating a Host Aggregate, you can designate a group of compute nodes to host Docker containers while having the rest of your compute nodes use your original hypervisor. [OpenStack Docs](http://docs.openstack.org/grizzly/openstack-compute/admin/content/host-aggregates.html), as usual, does an excellent job at explaining Host Aggregates and how to use them. For Docker:

Configure `nova-scheduler`:

```bash

$ grep scheduler_default_filters /etc/nova/nova.conf

scheduler_default_filters=AggregateInstanceExtraSpecsFilter,AvailabilityZoneFilter,RamFilter,ComputeFilter

```

Create a Host Aggregate:

```bash

$ nova aggregate-create docker nova

$ nova aggregate-set-metadata 1 docker=true

$ nova aggregate-add-host 1 node1.example.com

```

Now create a flavor and tie it to the aggregate:

```bash

$ nova flavor-create d1.tiny 500 1024 5 1

$ nova-manage instance_type set_key --name=d1.tiny --key=docker --value=true

```

Launching instances of type `d1.tiny` will cause OpenStack to launch the instance on `node1.example.com` only.