Skip to main content

Building go-lang project /Kubernetes Ingress/ from scratch with no go experience

I have been working with Kubernetes and I wanted to build it's contrib yesterday. However, nginx implementation of Kubernetes' Ingress is written in go-lang. Even though I needed to change some const string, it required recompilation.

Go is not java, and go building system is not maven. Setting up the environment was not straightforward. I was facing couple troubles but I'm going to take it from the beginning. My laptop uses ubuntu 15.04 - well 15.10 since 9pm :-) - and I have never installed go lang yet.

Go lang installation on Ubuntu

First of all, you need to install go lang. You can use official repo, but it contains older version 1.3. However, do not install it using apt-get as kubernetes or it's dependencies require higher version of go-lang. Of course, I originally installed version 1.3  but some fatal error occurred later. It forced me do to the manual installation anyway.

Here is simple tutorial.


Last two lines affect only the current terminal. You should update /etc/environment in the case you consider to use go-lang in the future.

Then, you can try to get version of go via:

$ go version
go version go1.5.1 linux/amd64

Go-lang compilation and building


Now, you can pull your git project, e.g.:

git clone https://github.com/kubernetes/contrib

There is a build command in go-lang. You can type it into you terminal:


What's wrong? We have not setup GOPATH yet. This directory is something like maven cache. It's pretty simple, you can just point the variable to your home, e.g.
export GOPATH=/home/martin/.go
Try to build it again. There are no errors, but nothing is happening. I found in some stackoverflow discussion that there is a get command as well. Unfortunately, build is consist of get anyway. Then I found -v as verbose.


Actually, we are on right track. The fetching of dependencies takes a time so it seemed that go build or go get did not work but that's not true.

That's all, now building should work:


Go-lang 1.3 vs 1.5

I just wanted to discuss why to prefer manual installation over ubuntu repository. For the record. Building kubernetes project using go-lang 1.3 from ubuntu official repo failed:

Comments

I'm facing the same error: undefined: crypto.Signer
where you able to get this resolved ?

Thanks!
hi, I was able to get get pass the undefined: cryto.Signer error.

This error is fixed by upgrading Go to at least 1.4.
go get -v golang.org/x/crypto/ssh

Incase you get this error after upgrade:
import /home/stack/mygo/pkg/linux_amd64/golang.org/x/crypto/curve25519.a: object is [linux amd64 go1.2.1 X:none] expected [linux amd64 go1.6 X:none]

Remove the previous ssh package files, should work then.

Thanks!
James Jiang said…
Thank you very much for this, saved my day at the 'go get -v' command - forgive I'm totally 0 knowledge about go. Was trying hard to let the 'godep' and Makefile work, but turned out go build should just do the job.
vstcomplex said…
I'm really impressed with your writing skills, as smart as the structure of your weblog.

GoLand Full Crack

Waves v12 Complete Crack

Popular posts from this blog

NHibernate performance issues #3: slow inserts (stateless session)

The whole series of NHibernate performance issues isn't about simple use-cases. If you develop small app, such as simple website, you don't need to care about performance. But if you design and develop huge application and once you have decided to use NHibernate you'll solve various sort of issue. For today the use-case is obvious: how to insert many entities into the database as fast as possible? Why I'm taking about previous stuff? The are a lot of articles how the original NHibernate's purpose isn't to support batch operations , like inserts. Once you have decided to NHibernate, you have to solve this issue. Slow insertion The basic way how to insert mapped entity into database is: SessionFactory.GetCurrentSession().Save(object); But what happen when I try to insert many entities? Lets say, I want to persist 1000 libraries each library has 100 books = 100k of books each book has 5 rentals - there are 500k of rentals  It's really slow! The inser

Git on Windows: MSysGit

I have started to use Git today. I read a lot of discussions that there is no good tool for Windows platform. After forethought I have decided to used TortoiseGit . I also feared of difficult work related with Git as a lot of articles mentioned many instructions. As I already said, I have decided to use TortoiseGit, because I'm used to work with TortoiseSvn, but for start, MSysGit is enought. So this article is about MSysGit , next will be about TortoiseGit . How to start with MSysgit on local machine? Download and install Git for Windows Create source code directory for your git app Right click the directory at your favorite file browser. Menu should contain item "Git init here". It initializes chosen directory to be git-abled :-) It was your first usage of Git. Commit data to local Git repository Now, you can add any file, your first source code, to created directory. If you are prepared to commit any changes to your local git repository, follow next instruc

Using CoreOS stack and Kubernetes #2: Why use CoreOS as Cloud Operating System

I'd like to deal in this part with potential benefits resulting from using CoreOS as an operating system in your cloud deployment. You can install kubernetes on various operating systems  so you can make a decision what to choose. So why CoreOS? What is my experience? Etcd, Fleet and Flannel Preinstalled First reason is obvious. CoreOS always provides latest version of all components in Kubernetes cluster.  My experience : we have profited from pre-installed components from the beginning. E.g. in early stages when etcd was coming with new beautiful and powerful API (v.2), they put both - old and new - versions together so we just enabled one of them. The setup of all components together is not very simple so you can save couple hours by choosing preinstalled and pre-setuped CoreOS. No Package Manager, Read Only Partitions It sounds more like disadvantage than benefit, but ... Look at CoreOS releases what it consist of. Fore example, CoreOS includes basic