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Prometheus is a required telemetry data source for Kiali. Jaeger is a highly recommended tracing data source. Kiali also offers a simple Grafana add-on integration. This page describes how to configure Kiali to communicate with these dependencies.
Read the dedicated configuration page to learn more.
Istio provides preconfigured Grafana dashboards for the most relevant metrics of the mesh. Although Kiali offers similar views in its metrics dashboards, it is not in Kiali’s goals to provide the advanced querying options, nor the highly customizable settings, that are available in Grafana. Thus, it is recommended that you use Grafana if you need those advanced options.
Kiali can provide a direct link from its metric dashboards to the equivalent or most similar Grafana dashboard, which is convenient if you need the powerful Grafana options. For these links to appear in Kiali you need to manually configure the Grafana URL and the dashboards that come preconfigured with Istio, like in the following example:
spec:
external_services:
grafana:
enabled: true
# Grafana service name is "grafana" and is in the "telemetry" namespace.
in_cluster_url: 'http://grafana.telemetry:3000/'
# Public facing URL of Grafana
url: 'http://my-ingress-host/grafana'
dashboards:
- name: "Istio Service Dashboard"
variables:
namespace: "var-namespace"
service: "var-service"
- name: "Istio Workload Dashboard"
variables:
namespace: "var-namespace"
workload: "var-workload"
- name: "Istio Mesh Dashboard"
- name: "Istio Control Plane Dashboard"
- name: "Istio Performance Dashboard"
- name: "Istio Wasm Extension Dashboard"
Kiali requires Prometheus to generate the topology graph, show metrics, calculate health and for several other features. If Prometheus is missing or Kiali can’t reach it, Kiali won’t work properly.
By default, Kiali assumes that Prometheus is available at the URL of the form
http://prometheus.<istio_namespace_name>:9090, which is the usual case if you
are using the Prometheus Istio
add-on.
If your Prometheus instance has a different service name or is installed in a
different namespace, you must manually provide the endpoint where it is
available, like in the following example:
spec:
external_services:
prometheus:
# Prometheus service name is "metrics" and is in the "telemetry" namespace
url: "http://metrics.telemetry:9090/"
Kiali maintains an internal cache of some Prometheus queries to improve performance (mainly, the queries to calculate Health indicators). It would be very rare to see data delays, but should you notice any delays you may tune caching parameters to values that work better for your environment.
See the Kiali CR reference page for the current default values.
Although Kiali assumes a Prometheus server and is tested against it, there are TSDBs that can be used as a Prometheus replacement despite not implementing the full Prometheus API.
Community users have faced two issues when using Prometheus-like TSDBs:
/api/v1/status/config.To fix these issues, you may need to provide a custom health check endpoint for
the TSDB and/or manually provide the configurations that Kiali reads from the
/api/v1/status/config API endpoint:
spec:
external_services:
prometheus:
# Fix the "Unreachable" metrics server warning.
health_check_url: "http://custom-tsdb-health-check-url"
# Fix for the empty metrics dashboards
thanos_proxy:
enabled: true
retention_period: "7d"
scrape_interval: "30s"
Production environments should not be using the Istio Prometheus add-on, or carrying over its configuration settings. That is useful only for small, or demo installations. Instead, Prometheus should have been installed in a production-oriented way, following the Prometheus documentation.
This section is primarily for users where Prometheus is being used specifically for Kiali, and possible optimizations that can be made knowing that Kiali does not utilize all of the default Istio and Envoy telemetry.
Istio and Envoy generate a large amount of telemetry for analysis and troubleshooting. This can result in significant resources being required to ingest and store the telemetry, and to support queries into the data. If you use the telemetry specifically to support Kiali, it is possible to drop unnecessary metrics and unnecessary labels on required metrics. This FAQ Entry displays the metrics and attributes required for Kiali to operate.
To reduce the default telemetry to only what is needed by Kiali1 users can add the following snippet to their Prometheus configuration. Because things can change with different versions, it is recommended to ensure you use the correct version of this documentation based on your Kiali/Istio version.
The metric_relabel_configs: attribute should be added under each job name defined to scrape Istio or Envoy metrics. Below we show it under the kubernetes-pods job, but you should adapt as needed. Be careful of indentation.
- job_name: kubernetes-pods
metric_relabel_configs:
- action: drop
source_labels: [__name__]
regex: istio_agent_.*|istiod_.*|istio_build|citadel_.*|galley_.*|pilot_[^p].*|envoy_cluster_[^u].*|envoy_cluster_update.*|envoy_listener_[^dh].*|envoy_server_[^mu].*|envoy_wasm_.*
- action: labeldrop
regex: chart|destination_app|destination_version|heritage|.*operator.*|istio.*|release|security_istio_io_.*|service_istio_io_.*|sidecar_istio_io_inject|source_app|source_version
Applying this configuration should reduce the number of stored metrics by about 20%, as well as reducing the number of attributes stored on many remaining metrics.
The section above drops metrics unused by Kiali. As such, making those configuration changes should not negatively impact Kiali behavior in any way. But some very heavy metrics remain. These metrics can also be dropped, but their removal will impact the behavior of Kiali. This may be OK if you don’t use the affected features of Kiali, or if you are willing to sacrifice the feature for the associated metric savings. In particular, these are “Histogram” metrics. Istio is planning to make some improvements to help users better configure these metrics, but as of this writing they are still defined with fairly inefficient default “buckets”, making the number of associated time-series quite large, and the overhead of maintaining and querying the metrics, intensive. Each histogram actually is comprised of 3 stored metrics. For example, a histogram named xxx would result in the following metrics stored into Prometheus:
xxx_bucket
xxx_count
xxx_sum
When considering whether to thin the Histogram metrics, one of the following three approaches is recommended:
These are the relevant Histogram metrics:
This metric is used to produce the Request Size chart on the metric tabs. It also supports Request Throughput edge labels on the graph.
|istio_request_bytes_.* to the drop regex above would drop all associated metrics and would prevent any request size/throughput reporting in Kiali.|istio_request_bytes_bucket to the drop regex above, would prevent any request size percentile reporting in the Kiali metric charts.This metric is used to produce the Response Size chart on the metric tabs. And also supports Response Throughput edge labels on the graph
|istio_response_bytes_.* to the drop regex above would drop all associated metrics and would prevent any response size/throughput reporting in Kiali.|istio_response_bytes_bucket to the drop regex above would prevent any response size percentile reporting in the Kiali metric charts.This metric is used to produce the Request Duration chart on the metric tabs. It also supports Response Time edge labels on the graph.
|istio_request_duration_milliseconds_.* to the drop regex above would drop all associated metrics and would prevent any request duration/response time reporting in Kiali.|istio_request_duration_milliseconds_bucket to the drop regex above would prevent any request duration/response time percentile reporting in the Kiali metric charts or graph edge labels.The Prometheus globalScrapeInterval is an important configuration option2. The scrape interval can have a significant effect on metrics collection overhead as it takes effort to pull all of those configured metrics and update the relevant time-series. And although it doesn’t affect time-series cardinality, it does affect storage for the data-points, as well as having impact when computing query results (the more data-points, the more processing and aggregation).
Users should think carefully about their configured scrape interval. Note that the Istio addon for prometheus configures it to 15s. This is great for demos but may be too frequent for production scenarios. The prometheus helm charts set a default of 1m, which is more reasonable for most installations, but may not be the desired frequency for any particular setup.
The recommendation for Kiali is to set the longest interval possible, while still providing a useful granularity. The longer the interval the less data points scraped, thus reducing processing, storage, and computational overhead. But the impact on Kiali should be understood. It is important to realize that request rates (or byte rates, message rates, etc) require a minumum of two data points:
rate = (dp2 - dp1) / timePeriod
That means for Kiali to show anything useful in the graph, or anywhere rates are used (many places), the minimum duration must be >= 2 x globalScrapeInterval. Kiali will eliminate invalid Duration options given the globalScrapeInterval.
Kiali does a lot of aggregation and querying over time periods. As such, the number of data points will affect query performance, especially for larger time periods.
For more information, see the Prometheus documentation.
The Prometheus tsdbRetentionTime is an important configuration option. It has a significant effect on metrics storage, as Prometheus will keep each reported data-point for that period of time, performing compaction as needed. The larger the retention time, the larger the required storage. Note also that Kiali queries against large time periods, and very large data-sets, may result in poor performance or timeouts.
The recommendation for Kiali is to set the shortest retention time that meets your needs and/or operational limits. In some cases users may want to offload older data to a secondary store. Kiali will eliminate invalid Duration options given the tsdbRetentionTime.
For more information, see the Prometheus documentation.
Some non-essential telemetry remains in order to not over-complicate the configuration change. The remaining telemetry is typically negligible. ↩︎
Note that Prometheus can be configured such that individual scrape points can override the global setting, but Kiali is not currently concerned with this corner case. ↩︎
Jaeger is the default tracing provider for Kiali. From Kiali version 1.74, Tempo support is also included. This page describes how to configure Jaeger and Grafana Tempo in Kiali.
Jaeger is a highly recommended service because Kiali uses distributed tracing data for several features, providing an enhanced experience.
By default, Kiali will try to reach Jaeger at the GRPC-enabled URL of the form
http://tracing.<istio_namespace_name>:16685/jaeger, which is the usual case
if you are using the Jaeger Istio
add-on.
If this endpoint is unreachable, Kiali will disable features that use
distributed tracing data.
If your Jaeger instance has a different service name or is installed to a different namespace, you must manually provide the endpoint where it is available, like in the following example:
spec:
external_services:
tracing:
# Enabled by default. Kiali will anyway fallback to disabled if
# Jaeger is unreachable.
enabled: true
# Jaeger service name is "tracing" and is in the "telemetry" namespace.
# Make sure the URL you provide corresponds to the non-GRPC enabled endpoint
# if you set "use_grpc" to false.
in_cluster_url: "http://tracing.telemetry:16685/jaeger"
use_grpc: true
# Public facing URL of Jaeger
url: "http://my-jaeger-host/jaeger"
Minimally, you must provide spec.external_services.tracing.in_cluster_url to
enable Kiali features that use distributed tracing data. However, Kiali can
provide contextual links that users can use to jump to the Jaeger console to
inspect tracing data more in depth. For these links to be available you need to
set the spec.external_services.tracing.url to the URL where you
expose Jaeger outside the cluster.
There are two possibilities to integrate Kiali with Grafana Tempo:
There are two steps to set up Kiali and Grafana Tempo:
This is a configuration example to set up Kiali tracing with Grafana Tempo:
spec:
external_services:
tracing:
# Enabled by default. Kiali will anyway fallback to disabled if
# Tempo is unreachable.
enabled: true
# Tempo service name is "query-frontend" and is in the "tempo" namespace.
# Make sure the URL you provide corresponds to the non-GRPC enabled endpoint
# It does not support grpc yet, so make sure "use_grpc" is set to false.
in_cluster_url: "http://tempo-tempo-query-frontend.tempo.svc.cluster.local:3200/"
provider: "tempo"
use_grpc: false
# Public facing URL of Tempo
url: "https://tempo-tempo-query-frontend-tempo.apps-crc.testing/"
The default UI for Grafana Tempo is Grafana, so we should also set the Grafana URL in the Kiali configuration, such as this example:
spec:
external_services:
grafana:
in_cluster_url: http://grafana.istio-system:3000
url: https://grafana.apps-crc.testing/
We can optionally set up a default Tempo datasource in Grafana so that you can view the Tempo tracing data within the Grafana UI, as you see here:
To set up the Tempo datasource, go to the Home menu in the Grafana UI, click Data sources, then click the Add new data source button and select the Tempo data source. You will then be asked to enter some data to configure the new Tempo data source:
The most important values to set up are the following:
http://tempo-tempo-query-frontend.tempo.svc.cluster.local:3200/The Traces tab in the Kiali UI will show your traces in a bubble chart:
Increasing performance is achievable by enabling gRPC access, specifically for query searches. However, accessing the HTTP API will still be necessary to gather information about individual traces. This is an example to configure the gRPC access:
spec:
external_services:
tracing:
enabled: true
# grpc port defaults to 9095
grpc_port: 9095
in_cluster_url: "http://query-frontend.tempo:3200"
provider: "tempo"
use_grpc: true
url: "http://my-tempo-host:3200"
It is possible to use the Grafana Tempo tracing backend exposing the Jaeger API. tempo-query is a Jaeger storage plugin. It accepts the full Jaeger query API and translates these requests into Tempo queries.
Since Tempo is not yet part of the built-in addons that are part of Istio, you need to manage your Tempo instance.
The official Grafana Tempo documentation explains how to deploy a Tempo instance using Tanka. You will need to tweak the settings from the default Tanka configuration to:
When the Tempo instance is deployed with the needed configurations, you have to
set
meshConfig.defaultConfig.tracing.zipkin.address
from Istio to the Tempo Distributor service and the Zipkin port. Tanka will deploy
the service in distributor.tempo.svc.cluster.local:9411.
The external_services.tracing.in_cluster_url Kiali option needs to be set to:
http://query-frontend.tempo.svc.cluster.local:16685.
The Tempo Operator for Kubernetes provides a native Kubernetes solution to deploy Tempo easily in your system.
After installing the Tempo Operator in your cluster, you can create a new Tempo instance with the following CR:
kubectl create namespace tempo
kubectl apply -n tempo -f - <<EOF
apiVersion: tempo.grafana.com/v1alpha1
kind: TempoStack
metadata:
name: smm
spec:
storageSize: 1Gi
storage:
secret:
type: s3
name: object-storage
resources:
total:
limits:
memory: 2Gi
cpu: 2000m
template:
queryFrontend:
jaegerQuery:
enabled: true
ingress:
type: ingress
EOF
Note the name of the bucket where the traces will be stored in our example is
called object-storage. Check the
Tempo Operator
documentation to know more about what storages are supported and how to create
the secret properly to provide it to your Tempo instance.
Now, you are ready to configure the
meshConfig.defaultConfig.tracing.zipkin.address
field in your Istio installation. It needs to be set to the 9411 port of the
Tempo Distributor service. For the previous example, this value will be
tempo-smm-distributor.tempo.svc.cluster.local:9411.
Now, you need to configure the in_cluster_url setting from Kiali to access
the Jaeger API. You can point to the 16685 port to use GRPC or 16686 if not.
For the given example, the value would be
http://tempo-ssm-query-frontend.tempo.svc.cluster.local:16685.
There is a related tutorial with detailed instructions to setup Kiali and Grafana Tempo with the Operator.