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Metrics via API, per-cluster Prometheus Config, OCP monitoring support
Signed-off-by: Michael Edgar <[email protected]>
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51 changes: 51 additions & 0 deletions
51
api/src/main/java/com/github/streamshub/console/api/model/Metrics.java
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,51 @@ | ||
| package com.github.streamshub.console.api.model; | ||
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| import java.time.Instant; | ||
| import java.util.LinkedHashMap; | ||
| import java.util.List; | ||
| import java.util.Map; | ||
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| import org.eclipse.microprofile.openapi.annotations.media.Schema; | ||
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| import com.fasterxml.jackson.annotation.JsonAnyGetter; | ||
| import com.fasterxml.jackson.annotation.JsonFormat; | ||
| import com.fasterxml.jackson.annotation.JsonProperty; | ||
| import com.fasterxml.jackson.annotation.JsonPropertyOrder; | ||
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| public record Metrics( | ||
| @JsonProperty | ||
| Map<String, List<Metrics.ValueMetric>> values, | ||
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| @JsonProperty | ||
| Map<String, List<Metrics.RangeMetric>> ranges) { | ||
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| public Metrics() { | ||
| this(new LinkedHashMap<>(), new LinkedHashMap<>()); | ||
| } | ||
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| @Schema(additionalProperties = String.class) | ||
| public static record ValueMetric( | ||
| @JsonProperty | ||
| String value, | ||
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| @JsonAnyGetter | ||
| @Schema(hidden = true) | ||
| Map<String, String> attributes) { | ||
| } | ||
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| @Schema(additionalProperties = String.class) | ||
| public static record RangeMetric( | ||
| @JsonProperty | ||
| @Schema(implementation = String[][].class) | ||
| List<RangeEntry> range, | ||
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| @JsonAnyGetter | ||
| @Schema(hidden = true) | ||
| Map<String, String> attributes) { | ||
| } | ||
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| @JsonFormat(shape = JsonFormat.Shape.ARRAY) | ||
| @JsonPropertyOrder({"when", "value"}) | ||
| public static record RangeEntry(Instant when, String value) { | ||
| } | ||
| } |
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187 changes: 187 additions & 0 deletions
187
api/src/main/java/com/github/streamshub/console/api/service/MetricsService.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,187 @@ | ||
| package com.github.streamshub.console.api.service; | ||
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| import java.io.IOException; | ||
| import java.net.URI; | ||
| import java.time.Instant; | ||
| import java.time.temporal.ChronoUnit; | ||
| import java.util.Base64; | ||
| import java.util.Collections; | ||
| import java.util.List; | ||
| import java.util.Map; | ||
| import java.util.concurrent.CompletableFuture; | ||
| import java.util.concurrent.CompletionStage; | ||
| import java.util.function.BiFunction; | ||
| import java.util.function.Predicate; | ||
| import java.util.function.Supplier; | ||
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| import jakarta.enterprise.context.ApplicationScoped; | ||
| import jakarta.inject.Inject; | ||
| import jakarta.json.JsonArray; | ||
| import jakarta.json.JsonObject; | ||
| import jakarta.ws.rs.WebApplicationException; | ||
| import jakarta.ws.rs.client.ClientRequestContext; | ||
| import jakarta.ws.rs.client.ClientRequestFilter; | ||
| import jakarta.ws.rs.core.HttpHeaders; | ||
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| import org.eclipse.microprofile.rest.client.RestClientBuilder; | ||
| import org.jboss.logging.Logger; | ||
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| import com.github.streamshub.console.api.model.Metrics; | ||
| import com.github.streamshub.console.api.model.Metrics.RangeEntry; | ||
| import com.github.streamshub.console.api.support.KafkaContext; | ||
| import com.github.streamshub.console.api.support.PrometheusAPI; | ||
| import com.github.streamshub.console.config.ConsoleConfig; | ||
| import com.github.streamshub.console.config.KafkaClusterConfig; | ||
| import com.github.streamshub.console.config.PrometheusConfig; | ||
| import com.github.streamshub.console.config.PrometheusConfig.Type; | ||
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| import io.fabric8.kubernetes.client.KubernetesClient; | ||
| import io.quarkus.tls.TlsConfiguration; | ||
| import io.quarkus.tls.TlsConfigurationRegistry; | ||
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| import static java.util.stream.Collectors.groupingBy; | ||
| import static java.util.stream.Collectors.mapping; | ||
| import static java.util.stream.Collectors.toList; | ||
| import static java.util.stream.Collectors.toMap; | ||
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| @ApplicationScoped | ||
| public class MetricsService { | ||
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| public static final String METRIC_NAME = "__console_metric_name__"; | ||
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| @Inject | ||
| Logger logger; | ||
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| @Inject | ||
| TlsConfigurationRegistry certificates; | ||
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| @Inject | ||
| KubernetesClient k8s; | ||
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| @Inject | ||
| KafkaContext kafkaContext; | ||
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| ClientRequestFilter createAuthenticationFilter(PrometheusConfig config) { | ||
| return new ClientRequestFilter() { | ||
| @Override | ||
| public void filter(ClientRequestContext requestContext) throws IOException { | ||
| var authConfig = config.getAuthentication(); | ||
| String authHeader = null; | ||
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| if (authConfig instanceof PrometheusConfig.Basic basic) { | ||
| authHeader = "Basic " + Base64.getEncoder().encodeToString("%s:%s".formatted( | ||
| basic.getUsername(), | ||
| basic.getPassword()) | ||
| .getBytes()); | ||
| } else if (authConfig instanceof PrometheusConfig.Bearer bearer) { | ||
| authHeader = "Bearer " + bearer.getToken(); | ||
| } else if (config.getType() == Type.OPENSHIFT_MONITORING) { | ||
| // ServiceAccount needs cluster role `cluster-monitoring-view` | ||
| authHeader = "Bearer " + k8s.getConfiguration().getAutoOAuthToken(); | ||
| } | ||
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| if (authHeader != null) { | ||
| requestContext.getHeaders().add(HttpHeaders.AUTHORIZATION, authHeader); | ||
| } | ||
| } | ||
| }; | ||
| } | ||
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| public PrometheusAPI createClient(ConsoleConfig consoleConfig, KafkaClusterConfig clusterConfig) { | ||
| PrometheusConfig prometheusConfig; | ||
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| if (clusterConfig.getMetricsSource() != null) { | ||
| prometheusConfig = consoleConfig.getMetricsSources() | ||
| .stream() | ||
| .filter(source -> source.getName().equals(clusterConfig.getMetricsSource())) | ||
| .findFirst() | ||
| .orElseThrow(); | ||
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| var trustStore = certificates.getDefault().map(TlsConfiguration::getTrustStore).orElse(null); | ||
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| return RestClientBuilder.newBuilder() | ||
| .baseUri(URI.create(prometheusConfig.getUrl())) | ||
| .trustStore(trustStore) | ||
| .register(createAuthenticationFilter(prometheusConfig)) | ||
| .build(PrometheusAPI.class); | ||
| } | ||
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| return null; | ||
| } | ||
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| CompletionStage<Map<String, List<Metrics.ValueMetric>>> queryValues(String query) { | ||
| PrometheusAPI prometheusAPI = kafkaContext.prometheus(); | ||
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| return fetchMetrics( | ||
| () -> prometheusAPI.query(query, Instant.now()), | ||
| (metric, attributes) -> { | ||
| // ignore timestamp in first position | ||
| String value = metric.getJsonArray("value").getString(1); | ||
| return new Metrics.ValueMetric(value, attributes); | ||
| }); | ||
| } | ||
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| CompletionStage<Map<String, List<Metrics.RangeMetric>>> queryRanges(String query) { | ||
| PrometheusAPI prometheusAPI = kafkaContext.prometheus(); | ||
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| return fetchMetrics( | ||
| () -> { | ||
| Instant now = Instant.now().truncatedTo(ChronoUnit.MILLIS); | ||
| Instant start = now.minus(30, ChronoUnit.MINUTES); | ||
| Instant end = now; | ||
| return prometheusAPI.queryRange(query, start, end, "25"); | ||
| }, | ||
| (metric, attributes) -> { | ||
| List<RangeEntry> values = metric.getJsonArray("values") | ||
| .stream() | ||
| .map(JsonArray.class::cast) | ||
| .map(e -> new Metrics.RangeEntry( | ||
| Instant.ofEpochMilli((long) (e.getJsonNumber(0).doubleValue() * 1000d)), | ||
| e.getString(1) | ||
| )) | ||
| .toList(); | ||
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| return new Metrics.RangeMetric(values, attributes); | ||
| }); | ||
| } | ||
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| <M> CompletionStage<Map<String, List<M>>> fetchMetrics( | ||
| Supplier<JsonObject> operation, | ||
| BiFunction<JsonObject, Map<String, String>, M> builder) { | ||
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| return CompletableFuture.supplyAsync(() -> { | ||
| try { | ||
| return extractMetrics(operation.get(), builder); | ||
| } catch (WebApplicationException wae) { | ||
| logger.warnf("Failed to retrieve Kafka cluster metrics, status %d: %s", | ||
| wae.getResponse().getStatus(), | ||
| wae.getResponse().getEntity()); | ||
| return Collections.emptyMap(); | ||
| } catch (Exception e) { | ||
| logger.warnf(e, "Failed to retrieve Kafka cluster metrics"); | ||
| return Collections.emptyMap(); | ||
| } | ||
| }); | ||
| } | ||
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| <M> Map<String, List<M>> extractMetrics(JsonObject response, | ||
| BiFunction<JsonObject, Map<String, String>, M> builder) { | ||
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| return response.getJsonObject("data").getJsonArray("result") | ||
| .stream() | ||
| .map(JsonObject.class::cast) | ||
| .map(metric -> { | ||
| JsonObject meta = metric.getJsonObject("metric"); | ||
| String metricName = meta.getString(METRIC_NAME); | ||
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| Map<String, String> attributes = meta.keySet() | ||
| .stream() | ||
| .filter(Predicate.not(METRIC_NAME::equals)) | ||
| .map(key -> Map.entry(key, meta.getString(key))) | ||
| .collect(toMap(Map.Entry::getKey, Map.Entry::getValue)); | ||
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| return Map.entry(metricName, builder.apply(metric, attributes)); | ||
| }) | ||
| .collect(groupingBy(Map.Entry::getKey, mapping(Map.Entry::getValue, toList()))); | ||
| } | ||
| } |
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