errose28 commented on code in PR #10034:
URL: https://github.com/apache/ozone/pull/10034#discussion_r3406654507
##########
hadoop-hdds/server-scm/src/main/java/org/apache/hadoop/hdds/scm/container/placement/metrics/SCMMetrics.java:
##########
@@ -155,6 +171,22 @@ public void decrContainerStat(ContainerStat deltaStat) {
this.containerReportWriteCount.incr(-1 * deltaStat.getWriteCount().get());
}
+ public void addRatisEvent(String event) {
+ synchronized (ratisEvents) {
+ if (ratisEvents.size() >= maxRatisEvents) {
+ ratisEvents.removeFirst();
+ }
+ ratisEvents.add(Time.formatTime(Time.now()) + "|" + event);
+ }
+ }
+
+ @Metric("Ratis state machine events")
+ public String getRatisEvents() {
+ synchronized (ratisEvents) {
+ return String.join("\n", ratisEvents);
Review Comment:
Newlines are invalid separators in Prometheus. This change prevents all SCM
metrics from being ingested into Prometheus. @jojochuang we should:
- Convert this to a different separator like `|`
- Add a command to our acceptance tests to check that all nodes' Prometheus
instances have registered metrics.
- Probably `GET http://localhost:9090/api/v1/targets` and ensure that
`health=up` for each component.
<img width="1855" height="251" alt="Image"
src="https://github.com/user-attachments/assets/12439069-f0ce-4460-9328-2e7239150ccf";
/>
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