Overall entity status

Sensu Go
1

Is there a sensible way to grab overall entity status? I’m thinking something like the way the Hostgroup Overview appears in Nagios/Icinga (a table with the first column being hostname, and second column showing how many checks are OK/WARNING/CRITICAL/UNKNOWN). With the current API, it seems that it would take an excessive number of API calls to generate this data (1 call per check per host).

The only idea I came up with was to actually generate this data in a scheduled check, but I was hoping there is a better way.

2

One alternative to consider would be in the dashboard using the entity: hostname Filter in the events view. That doesn’t provide a summary/count, however.

Screen Shot 2020-04-20 at 7.15.52 AM
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Though not its intended purpose, you could probably use the aggregate check to come up with a similar outcome.

Otherwise you could go the route of querying the API and building this information. However, rather than doing a query for each check per host, I would suggest using the events API and using response filtering with a fieldSelector=event.entity.name == hostname for each host. However, be aware that response filtering is a commercial feature.

3

Here’s an example I came up with querying the /events API using curl and jq to group and count the data. Maybe something like this could be adapted?

$ cat state.jq
map({State: .check.state})
| group_by(.State)
| map({State: .[0].State, Count: length})
| .[]

$ curl -s -H "Authorization: Bearer $SENSU_ACCESS_TOKEN" -k https://backend:8080/api/core/v2/events -G --data-urlencode 'fieldSelector=event.entity.name == "hostname"' | jq  -f state.jq
{
  "State": "failing",
  "Count": 1
}
{
  "State": "passing",
  "Count": 2
}
4

Thanks for all the ideas. I’m actually trying to figure out a way to display it in Grafana. I’m wondering if a custom data source might do the trick.

5

There’s the Sensu Go Grafana datasource.

6

I’ve been using the existing datasource for some dashboards, but it’s seems to be too limited for creating a dashboard like I’ve mentioned above. I was thinking of creating a custom source that would implement something similar to your code above. A custom panel might also work, but I think the custom data source might be a better option to reduce api queries.

The datasource repo has also had bug fixing pull requests sitting for half a year… Know anyone that can merge them into a new release? :slight_smile:

7

I’ll check on getting someone to look into the PR.