You're right the agent won't need read write. The volume is what needs to 
be setup as read write. See doc 
<https://kubernetes.io/docs/concepts/storage/persistent-volumes/#access-modes>
 
Write - would be the "cron" updating the repo
Read - would be the agents "cloning"
Reading and Writing can't happen simultaneously. 

On Monday, 10 May 2021 at 18:55:21 UTC-7 Marques Lee wrote:

> Typo — “why would the agents need read/write” was what I meant
>
> On Mon, May 10, 2021 at 6:53 PM Marques Lee <marqu...@thoughtworks.com> 
> wrote:
>
>> Pardon my lack of familiarity with GKE, my question may be extremely 
>> naive - if there’s only process that needs to write to the mount (the cron 
>> that performs the fetch to keep the code updated), then by would the agents 
>> need read/write on the volume? Isn’t read-only enough to clone for a 
>> pipeline run?
>>
>> On Mon, May 10, 2021 at 6:48 PM HUSSEIN KADIRI <hoka...@gmail.com> wrote:
>>
>>> Hmm, we setup GoCD on kubernetes so the server is a kubernetes 
>>> deployment. 
>>>
>>> We are on GKE . Yes we can mount a volume but GKE PVC are only 
>>> ReadWriteOnce (One pod mounted to read and write) or ReadOnlyMany (Multiple 
>>> pods mounted and reading only from the volume).
>>>
>>> Your recommendation requires a ReadWriteMany setup which is not possible 
>>> in GKE.
>>>
>>> On Mon, May 10, 2021, 6:43 PM Marques Lee <marqu...@thoughtworks.com> 
>>> wrote:
>>>
>>>> Hmm, unfortunately I don’t believe the git material in GoCD has native 
>>>> support for reference repos.
>>>>
>>>> Could the server not run a cron to do git fetch —all on the bare repo 
>>>> to keep it updated?
>>>>
>>>> Then all agents would pick up new changes so long as the volume holding 
>>>> the bare repo is mounted to agents.
>>>>
>>>> Otherwise, yeah, GoCD may not be a good fit for you until we build in 
>>>> support for —reference-repo if that’s a deal breaker.
>>>>
>>>> On Mon, May 10, 2021 at 6:37 PM HUSSEIN KADIRI <hoka...@gmail.com> 
>>>> wrote:
>>>>
>>>>> I have elastic agents so the cron route would not be feasible. 
>>>>>
>>>>> I mount a reference repo as a K8s PVC.
>>>>>
>>>>> I want to do a git clone <url> --reference-repo <path to my mounted 
>>>>> reference repo>. 
>>>>>
>>>>> Can the git material support or be modified to accept reference repo 
>>>>> paths? 
>>>>>
>>>>> This is kind of a deal breaker if it can't 
>>>>>
>>>>>
>>>>> On Mon, May 10, 2021, 6:31 PM Marques Lee <marqu...@thoughtworks.com> 
>>>>> wrote:
>>>>>
>>>>>> Hmm. Well I suppose you could git clone —bare —mirror to a known 
>>>>>> location and then:
>>>>>>
>>>>>> 1) create git materials with file system paths for the url instead of 
>>>>>> http/ssh
>>>>>> 2) run a cron to keep the ref repo updated
>>>>>>
>>>>>> Would that work?
>>>>>> On Mon, May 10, 2021 at 6:25 PM HUSSEIN KADIRI <hoka...@gmail.com> 
>>>>>> wrote:
>>>>>>
>>>>>>> My repo is too big, it can't be cloned by itself. it needs a 
>>>>>>> reference repo. 
>>>>>>>
>>>>>>> Is there a way to configure a reference repo ? 
>>>>>>>
>>>>>>> On Mon, May 10, 2021, 6:23 PM Marques Lee <marqu...@thoughtworks.com> 
>>>>>>> wrote:
>>>>>>>
>>>>>>>> Git materials support shallow clone. I think you need to expand the 
>>>>>>>> advance tab to see the option. It’s of course in cruise-config.xml as 
>>>>>>>> well 
>>>>>>>> as the various pipelines-as-config syntaxes.
>>>>>>>>
>>>>>>>> The workspace isn’t recloned every time either. If it exists on 
>>>>>>>> disk, it gets updated via fetch.
>>>>>>>>
>>>>>>>> On Mon, May 10, 2021 at 4:29 PM HUSSEIN KADIRI <hoka...@gmail.com> 
>>>>>>>> wrote:
>>>>>>>>
>>>>>>>>> Hi,
>>>>>>>>> Sometimes a git repo is large and so it's not efficient/fast to do 
>>>>>>>>> a git clone. One would have to use a reference repo. For all the 
>>>>>>>>> parts that 
>>>>>>>>> require git (config repository, git material, etc), is it possible to 
>>>>>>>>> have 
>>>>>>>>> more complex git workflows - utilizing a reference repo, shallow 
>>>>>>>>> clone - 
>>>>>>>>> since a simple git clone is not always possible? 
>>>>>>>>>
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