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README.markdown

1# FD.io Project CI Packer
2
3[Packer][1] is a tool for automatically creating VM and container images,
4configuring them and post-processing them into standard output formats.
5
6We build FD.io's CI images via Packer.
7
8## Building
9
10You'll need to [install Packer][2], of course.
11
12FD.io's Packer configuration is divided into build-specific variables,
13output-specific templates and a set of shared provisioning scripts. To do a
14specific build, combine the template for the desired output artifact type with
15a variable file. To build a new basebuild instance the following would be done:
16
17```
18packer build -var-file=vars/cloud-env.json -var-file=vars/centos.json templates/basebuild.json
19```
20
21**NOTE:** vars/cloud-env.json is a gitignored file as it contains private
22information. There is a vars/cloud-env.json.example file that may be used as a
23base for creating the one needed.
24
25This would build a bootable image in the FD.io CI cloud environment.
26
27From a high level, the builds:
28
29* Boot a specified base image in the cloud
30* Run a set of shell scripts, listed in the template's shell provisioner
31  section, to do any configuration required by the builder.
32* Execute a shutdown of the running instance
33* Execute a 'nova image-create' operation against the shutdown instance.
34* Perform a 'nova delete' operation against the shutdown instance.
35
36[1]: https://www.packer.io/
37[2]: https://www.packer.io/intro/getting-started/setup.html
38