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Bug 1511884 - Incorrect Health status of hosts on cluster with many nodes [NEEDINFO]
Summary: Incorrect Health status of hosts on cluster with many nodes
Alias: None
Product: Red Hat Gluster Storage
Classification: Red Hat
Component: web-admin-tendrl-monitoring-integration
Version: rhgs-3.3
Hardware: Unspecified
OS: Unspecified
Target Milestone: ---
: ---
Assignee: Shubhendu Tripathi
QA Contact: sds-qe-bugs
Depends On:
TreeView+ depends on / blocked
Reported: 2017-11-10 11:03 UTC by Filip Balák
Modified: 2018-11-20 12:06 UTC (History)
3 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Last Closed:
Target Upstream Version:
shtripat: needinfo? (fbalak)
shtripat: needinfo? (fbalak)
shtripat: needinfo? (nthomas)

Attachments (Terms of Use)
Hosts dashboard (deleted)
2017-11-10 11:03 UTC, Filip Balák
no flags Details
Hosts dashboard (deleted)
2017-11-10 11:05 UTC, Filip Balák
no flags Details

Description Filip Balák 2017-11-10 11:03:53 UTC
Description of problem:
I have cluster with 42 nodes and 7 volumes. Health panel in Hosts dashboard of some nodes is reporting value `Down` but I can access them via ssh and all services like tendrl-node-agent and collectd are running on them. Other metrics are reported. (As seen on screenshot)

Version-Release number of selected component (if applicable):

How reproducible:
70% There probably needs to be a great number of nodes.

Steps to Reproduce:
1. Install tendrl on big cluster with many nodes and more volumes.
2. Open Hosts grafana dashboard.
3. Check health panel for all nodes.

Actual results:
Some of the nodes are reported as Down but are up and running.

Expected results:
All nodes should be reported correctly.

Additional info:

Comment 1 Filip Balák 2017-11-10 11:05:02 UTC
Created attachment 1350421 [details]
Hosts dashboard

Comment 5 Shubhendu Tripathi 2017-11-13 09:57:46 UTC
@Filip, while debugging figured out that tendrl-gluster-integration was not running of any of the storage nodes. Looks like the storage nodes got restarted and as tendrl-gluster-integration was not enabled earlier for restart across reboots, the services down.

Also for the nodes which are shown as DOWN in dashboard, there are errors in tendrl-node-agent service logs around service refresh etc. Have seen few `os.fork` failures and suspect that could be due to less resources on the nodes.

I would suggest to refresh the setup with latest 1.5.4 build and keep the nodes configuration at least s below

Storage Nodes: 4GB RAM with dual core
Tendrl Server: 16GB RAM (as huge cluster) with quad core

Once the cluster is re-setup and imported in tendrl, lets look for any failures etc.

Comment 6 Nishanth Thomas 2017-11-15 18:37:03 UTC
This use case is addressed in the current release based on PM's comments. proposing this to the next release

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