Disk ID for a provisioned instance

Akshat Jiwan Sharma akshatjiwan at gmail.com
Tue Oct 31 06:03:29 UTC 2017


This is very helpful! Thanks.

On Tue, Oct 31, 2017 at 11:23 AM, Andrew Wilkins <
andrew.wilkins at canonical.com> wrote:

> On Tue, Oct 31, 2017 at 1:40 PM Akshat Jiwan Sharma <akshatjiwan at gmail.com>
> wrote:
>
>> Thanks Andrew. I'm using google cloud platform. But also planning to use
>> aws in the future.
>>
>
> For AWS, we tag the root disk EBS volume with:
>
>    key=Name
>    value=${INST_ID}-root
>
> So if you add a machine in Juju and it gets assigned the instance ID
> "inst-foo", then the root disk EBS volume will have a Name tag with the
> value "inst-foo-root".
>
> I don't know if we can guarantee that this will remain true forever, but
> it hasn't changed in a long time.
>
> HTH,
> Andrew
>
>
>> On Tue, Oct 31, 2017 at 8:23 AM, Andrew Wilkins <
>> andrew.wilkins at canonical.com> wrote:
>>
>>> On Tue, Oct 31, 2017 at 10:37 AM Akshat Jiwan Sharma <
>>> akshatjiwan at gmail.com> wrote:
>>>
>>>> Hi,
>>>>
>>>> I'd like to automate backups for my server provisioned via juju. For
>>>> that I'm planning to use terraform. To take a snapshot of the disk,
>>>> terraform needs a disk id.
>>>>
>>>> Is there a way I can get disk ID using juju commands? Juju show machine
>>>> only gives the capacity of the disk not its id.
>>>>
>>>
>>> Not at the moment. We'll need to extend the data model and update the
>>> providers to support this. We do record information about volumes that Juju
>>> provisions, but that excludes the root/OS disk.
>>>
>>> On a machine that I deployed on google cloud platform the disk id is
>>>> same as the instance id. Can I assume that the disk id is same as the
>>>> instance id everywhere?
>>>>
>>>
>>> No, that's not a safe assumption in general. Which cloud providers are
>>> you using?
>>>
>>> Thanks,
>>>> Akshat
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>>>
>>
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