Re: [MirageOS-devel] Struggling a bit with the Hello World applications

[Anil Madhavapeddy <anil@xxxxxxxxxx>]

On 17 Sep 2014, at 09:33, Anil Madhavapeddy <anil@xxxxxxxxxx> wrote:
> 
> On 6 May 2014, at 12:01, Dave Scott <Dave.Scott@xxxxxxxxxx> wrote:
>> On 6 May 2014, at 11:35, Anil Madhavapeddy <anil@xxxxxxxxxx> wrote:
>>> On 5 May 2014, at 21:34, André Næss <andre.naess@xxxxxxxxx> wrote:
>>>> 
>>>> On Mon, May 5, 2014 at 7:26 PM, Anil Madhavapeddy <anil@xxxxxxxxxx> wrote:
>>>>> Below is what happened:
>>>>> 
>>>>> On 14.04 I got this while running opam init:
>>>>> 
>>>>> ERROR] The compilation of base-bigarray.base failed.
>>>>> [ERROR] The compilation of base-threads.base failed.
>>>>> [ERROR] The compilation of base-unix.base failed.
>>>>> 
>>>>> ===== ERROR while installing base-bigarray.base =====
>>>>> Internal error:
>>>>> Sys_error("rm -rf /home/vagrant/.opam/system/lib/base-bigarray: Cannot 
>>>>> allocate memory")
>>>>> 
>>>>> ===== ERROR while installing base-threads.base =====
>>>>> Internal error:
>>>>> Sys_error("rm -rf /home/vagrant/.opam/system/lib/base-threads: Cannot 
>>>>> allocate memory")
>>>>> 
>>>>> ===== ERROR while installing base-unix.base =====
>>>>> Internal error:
>>>>> Sys_error("rm -rf /home/vagrant/.opam/system/lib/base-unix: Cannot 
>>>>> allocate memory")
>>>> 
>>>> To ask the obvious question: how much memory does this VM have?
>>>> 
>>>> I just tried reproducing this on a fresh Ubuntu 14.04 VMWare Fusion:
>>>> 
>>>> 
>>>> Ok, I'm slightly embarrassed now. I bumped the memory on the VM to 1024. 
>>>> The Vagrant default is pretty low. It works fine now.
>>> 
>>> Thanks for confirming it works (phew).  This does touch on the important 
>>> point of us distributed tested Vagrant boxes.
>>> 
>>> I just signed up for the Vagrant cloud that's in beta at the moment, and 
>>> will look into publishing an OPAM-friendly image with all the bits'n'bobs 
>>> installed.
>> 
>> I’ve hit this problem a few times myself. I’m also not happy with the 
>> provenance of the vagrant boxes I’m currently using: I really want something 
>> which can be built reproducibly from trusted pieces. Hosting my own box is 
>> also a bit of a pain since they often are 500MiB-1GiB. (I believe the 
>> vagrant cloud will host a link but not the artefact itself?)
>> 
>> So I started with Mort’s mirage-vagrant-vms repo and switched from veewee to 
>> packer[1][2]. I found packer to be easier to install than veewee but 
>> otherwise much the same. My box development cycle is now:
>> 
>> packer build template.json
>> vagrant box remove foo
>> vagrant box add new.box —name foo
>> 
>> My goal is to build all my boxes from:
>> 1. the definitions (the .json plus scripts) stored in .git
>> 2. the distro install CD (cached, with md5 checked)
>> 3. (hopefully small) repo of binary packages hosted by people I trust (e.g. 
>> me). Hopefully this is <100MiB and therefore easier to host somewhere
>> 
>> [1] http://packer.io/
>> [2] https://github.com/djs55/mirage-vagrant-vms/tree/packer
> 
> 
> Could you send a pull request for this to reconcile it with 
> mirage/mirage-vagrant-vms?
> 
> Now that we have blobs.openmirage.org, I'd like to start building these 
> regularly too.

Nik Sultana did a great job on this; I've just merged in his pull request that 
refreshes your Packer-based Vagrant: 
https://github.com/mirage/mirage-vagrant-vms/pull/4

Just built it on my Mac and it works fine.  The only possible hitch is that the 
version of Xen and the toolstack installed are very old (Xen 4.1 and XM), so 
pull requests to update to Debian Jessie would be welcome.  In the meanwhile 
though, it's good enough for development!

Once David Sheets' GitHub hook code is done, I'll set this to autobuild on the 
increasingly loaded blobs.openmirage.org as well (it's a bit too heavyweight to 
run on cron).

-anil


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