Open Stack

Hi all. Thanks to all that replied to no end. Lots of helpful information
there.

I apologise for not making this point but I am not looking for a 3rd party
tool to achieve this. What I am looking for at this time are components
already existing within openstack and open source is desired. I currently
run Pike so I expect I may need to upgrade to get components I need.

I did come across Freezer but not that wiki page. I'll work on setting up a
test for this :)


It’s true that our community lacks participation. It’s very difficult for a
> new operator to start using openstack and get help with the issues that
> they encounter.

 If I keep asking long enough in enough places, eventually someone will
> answer.

Yes it was difficult for me to learn. I managed to find a way through which
worked for me. I started with Packstack.

With regards to IRC - in my experience, once you get passed the
authentication problems and often session timeout/kick out, you see the
chat room with 300 people but no one chatting or answering. Kind of reduces
the worth of the chatroom this way in my opinion. Although, I am in
Australia so the timezone I am in could be a contributor.


Thanks again - I have enough hints from you guys to go away and do some
research.


Best regards,


*Tony Pearce*   |
*Senior Network Engineer / Infrastructure Lead**Cinglevue International
<https://www.cinglevue.com>*

Email: tony.pearce at cinglevue.com
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On Fri, 17 Jan 2020 at 07:00, Ignazio Cassano <ignaziocassano at gmail.com>
wrote:

> Hello, I suggest hystax for openstack failover and failback between two
> openstack sites.
> It works with openstack upstream As well.
> Ignazio
>
> Il Gio 16 Gen 2020, 23:46 Burak Hoban <Burak.Hoban at iag.com.au> ha scritto:
>
>> Hey Tony,
>>
>> Keep in mind that if you're looking to run OpenStack, but you're not
>> feeling comfortable with the community support then there's always the
>> option to go with a vendor backed version. These are usually a good option
>> for those a little more risk adverse, or who don't have the time/or skills
>> to maintain upstream releases  - however going down that path usually means
>> you can do less with OpenStack (depending on the vendor), but you have a
>> large pool of resources to help troubleshoot and answer questions. We do
>> both approaches internally for different clusters, so both approaches have
>> their pro and cons.
>>
>> You touched on a few points in your original email...
>>
>> > If you had two OpenStack clusters, one in "site 1" and another in "site
>> 2", then you could look at below for backup/restore of instances
>> cross-cluster:
>>  - Freezer -> https://wiki.openstack.org/wiki/Freezer
>>  - Trillio (basically just a series of nova snapshots under the cover) ->
>> https://www.trilio.io/
>>
>> You could then over the top roll out a file level based backup tool on
>> each instance, this would pretty much offer you replication functionality
>> without having to do block-level tinkering.
>>
>> > Failover of OpenStack controller/computes
>> If you have two sites, you can always go for 3x Controller deployment
>> spanning cross site. Depending on latency obviously, however all you really
>> need is a good enough link for RabbitMQ/Galera to talk reliably etc.
>>
>> Failing that, I'd recommend backing up your Controller with ReaR. From
>> there you can also schedule frequent automated jobs to do a OpenStack DB
>> backups. Recovering should be a case of ReaR restore, load latest OpenStack
>> DB and start everything up... You'll probably want to ensure your VLANs are
>> spanned cross-site so you can reuse same IP addresses.
>>
>>
>> https://docs.openstack.org/project-deploy-guide/tripleo-docs/latest/post_deployment/backup_and_restore/05_rear.html
>>
>> https://superuser.openstack.org/articles/tutorial-rear-openstack-deployment/
>>
>>
>> In reality, the best solution would be to have two isolated clusters, and
>> your workloads spanned across both sites. Obviously that isn't always
>> possible (from personal experience), but pushing people down the Kubernetes
>> path and then for the rest automation/backup utilities may cater for your
>> needs.
>>
>> Having said that, Albert's link does look promising ->
>> https://docs.openstack.org/cinder/pike/contributor/replication.html
>>
>>
>>
>> Date: Thu, 16 Jan 2020 19:49:08 +0000
>> From: Albert Braden <Albert.Braden at synopsys.com>
>> To: Tony Pearce <tony.pearce at cinglevue.com>,
>>         "openstack-discuss at lists.openstack.org"
>>         <openstack-discuss at lists.openstack.org>
>> Subject: RE: DR options with openstack
>> Message-ID:
>>         <
>> BN8PR12MB3636451FC8E2BC6A50216425D9360 at BN8PR12MB3636.namprd12.prod.outlook.com
>> >
>>
>> Content-Type: text/plain; charset="utf-8"
>>
>> Hi Tony,
>>
>> It looks like Cheesecake didn’t survive but apparently some components of
>> it did; details in
>> https://docs.openstack.org/cinder/pike/contributor/replication.html
>>
>> I’m not using Cinder now; we used it at eBay with Ceph and Netapp
>> backends. Netapp makes it easy but is expensive; Ceph is free but you have
>> to figure out how to make it work. You’re right about forking; we did it
>> and then upgrading turned from an incredibly difficult ordeal to an
>> impossible one. It’s better to stay with the “official” code so that
>> upgrading remains an option.
>>
>> I’m just an operator; hopefully someone more expert will reply with more
>> useful info.
>>
>> It’s true that our community lacks participation. It’s very difficult for
>> a new operator to start using openstack and get help with the issues that
>> they encounter. So far this mailing list has been the best resource for me.
>> IRC and Ask Openstack are mostly unattended. I try to help out in
>> #openstack when I can, but I don’t know a lot so I mostly end up telling
>> people to ask on the list. On IRC sometimes I find help by asking in other
>> openstack-* channels. Sometimes people complain that I’m asking in a
>> developer channel, but sometimes I get help. Persistence is the key. If I
>> keep asking long enough in enough places, eventually someone will answer.
>> If all else fails, I open a bug.
>>
>> Good luck and welcome to the Openstack community!
>>
>> From: Tony Pearce <tony.pearce at cinglevue.com>
>> Sent: Wednesday, January 15, 2020 11:37 PM
>> To: openstack-discuss at lists.openstack.org
>> Subject: DR options with openstack
>>
>> Hi all
>>
>> My questions are;
>>
>>
>>   1.  How are people using iSCSI Cinder storage with Openstack to-date?
>> For example a Nimble Storage array backend. I mean to say, are people using
>> backend integration drivers for other hardware (like netapp)? Or are they
>> using backend iscsi for example?
>>   2.  How are people managing DR with Openstack in terms of backend
>> storage replication to another array in another location and continuing to
>> use Openstack?
>>
>> The environment which I am currently using;
>> 1 x Nimble Storage array (iSCSI) with nimble.py Cinder driver
>> 1 x virtualised Controller node
>> 2 x physical compute nodes
>> This is Openstack Pike.
>>
>> In addition, I have a 2nd Nimble Storage array in another location.
>>
>> To explain the questions I’d like to put forward my thoughts for question
>> 2 first:
>> For point 2 above, I have been searching for a way to utilise replicated
>> volumes on the 2nd array from Openstack with existing instances. For
>> example, if site 1 goes down how would I bring up openstack in the 2nd
>> location and boot up the instances where their volumes are stored on the
>> 2nd array. I found a proposal for something called “cheesecake” ref:
>> https://specs.openstack.org/openstack/cinder-specs/specs/rocky/cheesecake-promote-backend.html
>> <
>> https://urldefense.proofpoint.com/v2/url?u=https-3A__specs.openstack.org_openstack_cinder-2Dspecs_specs_rocky_cheesecake-2Dpromote-2Dbackend.html&d=DwMFaQ&c=DPL6_X_6JkXFx7AXWqB0tg&r=XrJBXYlVPpvOXkMqGPz6KucRW_ils95ZMrEmlTflPm8&m=e2jC0sFEUAs6byl7JOv5IAZTKPkABl-Eh6rQwQ55tWk&s=oVEr3DpxprOpbuxZ_4WSfSqAVCaZUlPCFT6g6DsqQHQ&e=
>> >
>> But I could not find if it had been approved or implemented. So I return
>> to square 1. I have some thoughts about failing over the controller VM and
>> compute node but I don’t think there’s any need to go into here because of
>> the above blocker and for brevity anyway.
>>
>> The nimble.py driver which I am using came with Openstack Pike and it
>> appears Nimble / HPE are not maintaining it any longer. I saw a commit to
>> remove nimble.py in Openstack Train release. The driver uses the REST API
>> to perform actions on the array. Such as creating a volume, downloading the
>> image, mounting the volume to the instance, snapshots, clones etc. This is
>> great for me because to date I have around 10TB of openstack storage data
>> allocated and the Nimble array shows the amount of data being consumed is
>> <900GB. This is due to the compression and zero-byte snapshots and clones.
>>
>> So coming back to question 2 – is it possible? Can you drop me some
>> keywords that I can search for such as an Openstack component like
>> Cheesecake? I think basically what I am looking for is a supported way of
>> telling Openstack that the instance volumes are now located at the new /
>> second array. This means a new cinder backend. Example, new iqn, IP
>> address, volume serial number.  I think I could probably hack the cinder db
>> but I really want to avoid that.
>>
>> So failing the above, it brings me to the question 1 I asked before. How
>> are people using Cinder volumes? May be I am going about this the wrong way
>> and need to take a few steps backwards to go forwards? I need storage to be
>> able to deploy instances onto. Snapshots and clones are desired. At the
>> moment these operations take less time than the horizon dashboard takes to
>> load because of the waiting API responses.
>>
>> When searching for information about the above as an end-user / consumer
>> I get a bit concerned. Is it right that Openstack usage is dropping?
>> There’s no web forum to post questions. The chatroom on freenode is filled
>> with ~300 ghosts. Ask Openstack questions go without response. Earlier this
>> week (before I found this mail list) I had to use facebook to report that
>> the Openstack.org website had been hacked. Basically it seems that if
>> you’re a developer that can write code then you’re in but that’s it. I have
>> never been a coder and so I am somewhat stuck.
>>
>> Thanks in advance
>>
>> Sent from Mail<
>> https://urldefense.proofpoint.com/v2/url?u=https-3A__go.microsoft.com_fwlink_-3FLinkId-3D550986&d=DwMFaQ&c=DPL6_X_6JkXFx7AXWqB0tg&r=XrJBXYlVPpvOXkMqGPz6KucRW_ils95ZMrEmlTflPm8&m=e2jC0sFEUAs6byl7JOv5IAZTKPkABl-Eh6rQwQ55tWk&s=Qo1wKkAeo1uTCH83dVO-IVt4MWhQRk7rg3xKmlzPGhI&e=>
>> for Windows 10
>>
>>
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