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Re: Issues with logging and metrics on Origin 3.7

Ah, so that makes more sense.

So can I define the persistence properties (e.g. using nfs) in the inventory file, but specify 'openshift_metrics_install_metrics=false' and then run the byo/config.yml  playbook will that create the PVs, but not deploy metrics. Then I can later run the byo/openshift-cluster/openshift-metrics.yml to actually deploy the metrics. 

The reason I'm doing this in 2 stages is that I sometimes hit 'Unable to allocate memory' problems when trying to deploy everything with byo/config.yml (possibly due to the 'forks' setting in ansible.cfg).

On 08/01/18 17:49, Eric Wolinetz wrote:
I think the issue you're seeing stems from the fact that the logging and metrics playbooks to not create their own PVs. That is handled by the cluster install playbook.
The logging and metrics playbooks only create the PVCs that their objects may require (unless ephemeral storage is configured).

I admit, the naming of the variables makes that confusing however it is described in our docs umbrella'd under the advanced install section which uses the cluster playbook... 

On Mon, Jan 8, 2018 at 11:22 AM, Tim Dudgeon <tdudgeon ml gmail com> wrote:
On 08/01/18 16:51, Luke Meyer wrote:

On Thu, Jan 4, 2018 at 10:39 AM, Tim Dudgeon <tdudgeon ml gmail com> wrote:
I'm hitting a number of issues with installing logging and metrics on Origin 3.7.
This is using Centos7 hosts, the release-3.7 branch of openshift-ansible and NFS for persistent storage.

I first do a minimal deploy with logging and metrics turned off.
This goes fine. On the NFS server I see various volumes exported under /exports for logging, metrics, prometheus, even thought these are not deployed, but that's fine,  they are there if they become needed.
As epxected there are no PVs related to metrics and logging.

So I try to install metrics. I add this to the inventory file:

openshift_metrics_storage_labels={'storage': 'metrics'}

and run:

ansible-playbook openshift-ansible/playbooks/byo/openshift-cluster/openshift-metrics.yml

All seems to install OK, but metrics can't start, and it turns out that no PV is created so the PVC needed by Casandra can't be satisfied.
So I manually create the PV using this definition:

apiVersion: v1
kind: PersistentVolume
  name: metrics-pv
    storage: metrics
    storage: 10Gi
    - ReadWriteOnce
  persistentVolumeReclaimPolicy: Recycle
    path: /exports/metrics
    server: nfsserver

Now the PVC is satisfied and metrics can be started (though pods may need to be bounced because they have timed out).

ISSUE 1: why does the metrics PV not get created?

So now on to trying to install logging. The approach is similar. Add this to the inventory file:

openshift_logging_storage_labels={'storage': 'logging'}

and run:
ansible-playbook openshift-ansible/playbooks/byo/openshift-cluster/openshift-logging.yml

Logging installs fine, and is running fine. Kibana shows logs.
But look at what has been installed and there are no PVs or PVs for logging. It seems it has  ignored the instructions to use NFS and and deployed using ephemeral storage.

ISSUE 2: why does the persistence definitions get ignored?

I'm not entirely sure that under kind=nfs it's *supposed* to create a PVC. Might just directly mount the volume.

One thing to check: did you set up a host in the [nfs] group in your inventory?
Yes, there is a nfs server, and its working fine (e.g. for the docker registry)

And finally, looking at the metrics and logging images on Docker Hub there are none with
v3.7.0 or v3.7 tags. The only tag related to 3.7 is v3.7.0-rc.0. For example look here:
But for other openshift components there is a v3.7.0 tag present.
Without specifying any particular tag to use for metrics or logging it seems you get 'latest' installed.

ISSUE 3: is 3.7 officially released yet (there's no docs for this here either: https://docs.openshift.org/index.html)?

3.7 is released. Seems like those dockerhub images (tags) got lost in the shuffle though.
OK. They will presumably appear sometime soon?
What about docs for 3.7? https://docs.openshift.org/index.html

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