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README.md |
Lumi
Lumi is a framework and toolset for creating reusable cloud services.
If you are learning about Lumi for the first time, please see the overview document.
Installing
To install Lumi from source, simply run:
$ go get -u github.com/pulumi/lumi/cmd/lumi
A GOPATH
must be set. A good default value is ~/go
. In fact, this is the default in Go 1.8.
This installs the lumi
binary to $GOPATH/bin
.
At this moment, libraries must be manually installed. See below. Eventually we will have an installer.
Compilers
The Lumi compilers are independent from the core Lumi tools.
Please see the respective pages for details on how to install, build, and test each compiler:
Development
This section is for Lumi developers.
Prerequisites
Lumi is written in Go and uses Glide for dependency management. They must be installed:
If you wish to use the optional lint
make target, you'll also need to install Golint:
$ go get -u github.com/golang/lint/golint
Building and Testing
To build Lumi, ensure $GOPATH
is set, and clone into a standard Go workspace:
$ git clone git@github.com:pulumi/lumi $GOPATH/src/github.com/pulumi/lumi
At this point you should be able to build and run tests from the root directory:
$ cd $GOPATH/src/github.com/pulumi/lumi
$ glide update
$ make
This installs the lumi
binary into $GOPATH/bin
, which may now be run provided make
exited successfully.
Installing the Runtime Libraries
By default, Lumi looks for its runtime libraries underneath /usr/local/lumi
. $LUMIPATH
overrides this.
Please refer to the libraries README for details on additional installation requirements.
Debugging
The Lumi tools have extensive logging built in. In fact, we encourage liberal logging in new code, and adding new logging when debugging problems. This helps to ensure future debugging endeavors benefit from your sleuthing.
All logging is done using Google's Glog library. It is relatively bare-bones, and adds basic leveled logging, stack dumping, and other capabilities beyond what Go's built-in logging routines offer.
The Lumi command line has two flags that control this logging and that can come in handy when debugging problems. The
--logtostderr
flag spews directly to stderr, rather than the default of logging to files in your temp directory. And
the --verbose=n
flag (-v=n
for short) sets the logging level to n
. Anything greater than 3 is reserved for
debug-level logging, greater than 5 is going to be quite verbose, and anything beyond 7 is extremely noisy.
For example, the command
$ lumi eval --logtostderr -v=5
is a pretty standard starting point during debugging that will show a fairly comprehensive trace log of a compilation.