On 08/01/18 16:51, Luke Meyer wrote:
On Thu, Jan 4, 2018 at 10:39 AM, Tim Dudgeon <[email protected]
<mailto:[email protected]>> 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_install_metrics=true
openshift_metrics_storage_kind=nfs
openshift_metrics_storage_access_modes=['ReadWriteOnce']
openshift_metrics_storage_nfs_directory=/exports
openshift_metrics_storage_nfs_options='*(rw,root_squash)'
openshift_metrics_storage_volume_name=metrics
openshift_metrics_storage_volume_size=10Gi
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
metadata:
name: metrics-pv
labels:
storage: metrics
spec:
capacity:
storage: 10Gi
accessModes:
- ReadWriteOnce
persistentVolumeReclaimPolicy: Recycle
nfs:
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_install_logging=true
openshift_logging_storage_kind=nfs
openshift_logging_storage_access_modes=['ReadWriteOnce']
openshift_logging_storage_nfs_directory=/exports
openshift_logging_storage_nfs_options='*(rw,root_squash)'
openshift_logging_storage_volume_name=logging
openshift_logging_storage_volume_size=10Gi
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:
https://hub.docker.com/r/openshift/origin-metrics-hawkular-metrics/tags/
<https://hub.docker.com/r/openshift/origin-metrics-hawkular-metrics/tags/>
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
<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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