BOSH Agent written in Go

PATH=.../s3cli/out:$PATH bin/run -I dummy -P ubuntu

Running locally

To start server locally:

gem install nats
nats-server

To subscribe:

nats-sub '>' -s nats://localhost:4222

To publish:

nats-pub agent.123-456-789 '{"method":"apply","arguments":[{"packages":[{"name":"package-name", "version":"package-version"}]}]}' -s nats://localhost:4222

Blobstores

The Go Agent ships with 4 default blobstores:

• Local filesystem
• Dummy (for testing)
• S3
• DAV

You can, however, use custom blobstores by implementing a simple interface. For example, if you want to use a blobstore named "custom" you need to create an executable named bosh-blobstore-custom somewhere in PATH. This executable must conform to the following command line interface:

• -c flag that specifies a config file path (this will be passed to every call to the executable)
• must parse the config file in JSON format
• must respond to get <blobID> <filename> by placing the file identified by the blobID into the filename specified
• must respond to put <filename> <blobID> by storing the file at filename into the blobstore at the specified blobID

A full call might look like:

bosh-blobstore-custom -c /var/vcap/bosh/etc/blobstore-custom.json get 2340958ddfg /tmp/my-cool-file

Set up a workstation for development

Note: This guide assumes a few things:

• You are working out of your $HOME/workspace directory.
• You have git
• You have gcc (or an equivalent)
• You can install packages (brew, apt-get, or equivalent)

Clone and set up the BOSH Agent repository:

• go get -d github.com/cloudfoundry/bosh-agent
  • Note that this will print an error message because it expects a single package; our repository consists of several packages. The error message is harmless—the repository will still be checked out.
• cd $GOPATH/src/github.com/cloudfoundry/bosh-agent

From here on out we assume you're working in $GOPATH/src/github.com/cloudfoundry/bosh-agent

Get Golang and its dependencies (Mac example, replace with your package manager of choice):

• brew update
• brew install go
• brew install hg (Go needs mercurial for the go get command)

Install tools used by the BOSH Agent test suite:

• go get code.google.com/p/go.tools/cmd/vet
• go get github.com/golang/lint/golint

Running tests

Each package in the agent has its own unit tests. You can run all unit tests with bin/test-unit.

Additionally, BOSH includes integration tests that use this agent. Run bin/test-integration to run those. However, in order to run the BOSH integrations tests, you will need a copy of the BOSH repo, which this script will do in ./tmp. BOSH uses Ruby for its tests, so you will also need to have that available.

You can run all the tests by running bin/test.

Using IntelliJ with Go and the BOSH Agent

• Install IntelliJ 13 (we are using 13.0.1 Build 133.331)
• Set up the latest Google Go plugin for IntelliJ by following Ross Hale's blog post (the plugin found in IntelliJ's repository is dated)
• Download and use the improved keybindings for IntelliJ (optional):
  • git clone [email protected]:Pivotal-Boulder/IDE-Preferences.git
  • cd ~/Library/Preferences/IntelliJIdea13/keymaps
  • ln -sf ~/workspace/IDE-Preferences/IntelliJKeymap.xml
  • In IntelliJ: Preferences -> Keymap -> Pick 'Mac OS X 10.5+ Improved'

Set up the Go Agent project in IntelliJ:

• Open the ~/workspace/bosh-agent project in IntelliJ.
• Set the Go SDK as the Project SDK: File -> Project Structure -> Project in left sidebar -> Set the Go SDK go1.2 SDK under Project SDK
• Set the Go SDK as the Modules SDK: Modules in left sidebar -> Dependencies tab -> Set the Go SDK for the Module SDK -> Apply, OK

You should now be able to run tests from within IntelliJ.