OK thanks so it does seem that the repo I pointed to:
I have found this:
https://github.com/ovn-org/ovn-kubernetes#readme
Is the master branch of
(https://github.com/ovn-org/ovn-kubernetes/commit/a07b1a01af7e37b15c2e5f179ffad2b9f25a083d)
uses statefulset and headless service for starting ovn central raft
cluster with 3 replicas. Cluster startup code and pod specs are
And does create an OVN central cluster as a k8 service.
I'll give it a try.
Thanks
On 25/06/2020 17:36, aginwala wrote:
Hi:
There are a couple of options as I have been exploring this too:
1. Upstream ovn-k8s patches
(https://github.com/ovn-org/ovn-kubernetes/commit/a07b1a01af7e37b15c2e5f179ffad2b9f25a083d)
uses statefulset and headless service for starting ovn central raft
cluster with 3 replicas. Cluster startup code and pod specs are pretty
neat that addresses most of the doubts.
OVN components have been containerized too to start them in pods. You
can also refer to
https://github.com/ovn-org/ovn/blob/d6b56b1629d5984ef91864510f918e232efb89de/Documentation/intro/install/general.rst
for the same and use them to make it work in pod specs too.
2. Write a new ovn operator similar to etcd operator
https://github.com/coreos/etcd-operator which just takes the count of
raft replicas and does the job in the background.
I also added ovn-k8s group so they can comment on any other ideas too.
Hope it helps.
On Thu, Jun 25, 2020 at 7:15 AM Brendan Doyle
<[email protected] <mailto:[email protected]>> wrote:
Hi,
So I'm trying to find information on setting up an OVN
"Central/Master"
high availability (HA)
Not as Active-Backup with Pacemaker, but as a cluster. But I want to
deploy and manage that
cluster as a Kubernetes service .
I can find lots of stuff on "ovn-kube" but this seems to be using
OVN as
a kubernetes CNI instead of
Flannel etc. But this is not what I want to do, I have a kubernetes
cluster using Flannel as the CNI,
now I want to deploy a HA OVN "Central" as a kubernetes service.
Kind
of like how you can deploy
a MySQL cluster in kubernetes using a SatefulSet deployment.
I have found this:
https://github.com/ovn-org/ovn-kubernetes#readme
But it is not clear to me if this is how to setup OVN as a kubernetes
CNI or it's how to setup a HA
OVN central as kubernetes service.
Can anybody comment, has anyone done this?
I guess I could run an OVN central as standalone and use a kubernetes
deployment with 3
replica sets and "export" as a NodePort service. And have a
floating/VIP on my kubernetes
nodes. And direct ovn-controllers to the VIP. So only the pod that
holds
the VIP would service
requests. This would work and give HA, but you don't get the
performance
of an OVN
clustered Database Model, where each OVN central could service
requests.
Thanks
Rdgs
Brendan
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