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https://issues.apache.org/jira/browse/AMBARI-8623?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14242156#comment-14242156
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Jonathan Hurley commented on AMBARI-8623:
-----------------------------------------
The final format was
{noformat}
{
"href" :
"http://localhost:8080/api/v1/clusters/c1?fields=alerts_summary_hosts";,
"Clusters" : {
"cluster_name" : "c1",
"version" : "HDP-2.2"
},
"alerts_summary_hosts" : {
"CRITICAL" : 2,
"OK" : 1,
"UNKNOWN" : 0,
"WARNING" : 1
}
}
{noformat}
Where the sum of all of the values will always be the total number of hosts. In
the above example, there are 2 hosts whose most severe alert is CRITICAL, there
is a single host whose most severe alert is WARNING, and there is a single host
with all alerts OK.
> Alert Host Count Summary Exposed Via Cluster Endpoint
> -----------------------------------------------------
>
> Key: AMBARI-8623
> URL: https://issues.apache.org/jira/browse/AMBARI-8623
> Project: Ambari
> Issue Type: Task
> Components: alerts, ambari-server
> Affects Versions: 2.0.0
> Reporter: Jonathan Hurley
> Assignee: Jonathan Hurley
> Fix For: 2.0.0
>
> Attachments: AMBARI-8623.patch
>
>
> In Ambari-1.7.0 the cluster endpoint used to have a summary of host-counts by
> severity. We need such a field in Ambari-2.0.0.
> {code}
> alerts: {
> summary: {
> CRITICAL: 1,
> OK: 4,
> PASSIVE: 0,
> WARNING: 0
> }
> }
> {code}
> The alerts_summary structure currently returned by the 2.0.0 API are the
> summary counts of alerts in the system, not those of the hosts. There are
> alerts that don't have a host (such as aggregate alerts).
> In order to expose the host alert count, there are two ways to do this:
> 1) Add a new field to the cluster endpoint; something like
> {{alerts_host_summary}}
> {noformat}
> http://localhost:8080/api/v1/clusters/c1?fields=alerts_host_summary
> {
> "href" :
> "http://localhost:8080/api/v1/clusters/c1?fields=alerts_host_summary";,
> "Clusters" : {
> "cluster_name" : "c1",
> "version" : "HDP-2.2"
> },
> "alerts_host_summary" : {
> "CRITICAL" : 1,
> "OK" : 41,
> "UNKNOWN" : 0,
> "WARNING" : 0
> }
> }
> {noformat}
> 2) Provide a new formatter to display the alerts formatted by host:
> {noformat}
> http://localhost:8080/api/v1/clusters/c1/alerts?format=hostSummary
> {
> "href" :
> "http://localhost:8080/api/v1/clusters/c1/alerts?format=hostSummary";,
> "alerts_summary" : {
> "CRITICAL" : {
> "count" : 1,
> "original_timestamp" : 1418150735812
> },
> "OK" : {
> "count" : 41,
> "original_timestamp" : 1418151145325
> },
> "UNKNOWN" : {
> "count" : 0,
> "original_timestamp" : 0
> },
> "WARNING" : {
> "count" : 0,
> "original_timestamp" : 0
> }
> }
> }
> {noformat}
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