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393f4ab86f
docs: update links to grafana dashboards Signed-off-by: Artem Navoiev <tenmozes@gmail.com>
552 lines
20 KiB
Markdown
552 lines
20 KiB
Markdown
# Kubernetes monitoring with VictoriaMetrics Cluster
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**This guide covers:**
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* The setup of a [VictoriaMetrics cluster](https://docs.victoriametrics.com/Cluster-VictoriaMetrics.html) in [Kubernetes](https://kubernetes.io/) via Helm charts
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* How to scrape metrics from k8s components using service discovery
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* How to visualize stored data
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* How to store metrics in [VictoriaMetrics](https://victoriametrics.com) tsdb
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**Precondition**
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We will use:
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* [Kubernetes cluster 1.19.9-gke.1900](https://cloud.google.com/kubernetes-engine)
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> We use GKE cluster from [GCP](https://cloud.google.com/) but this guide also applies on any Kubernetes cluster. For example [Amazon EKS](https://aws.amazon.com/ru/eks/).
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* [Helm 3 ](https://helm.sh/docs/intro/install)
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* [kubectl 1.21](https://kubernetes.io/docs/tasks/tools/install-kubectl)
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<p align="center">
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<img src="guide-vmcluster-k8s-scheme.png" width="800" alt="VictoriaMetrics Cluster on Kubernetes cluster">
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</p>
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## 1. VictoriaMetrics Helm repository
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> For this guide we will use Helm 3 but if you already use Helm 2 please see this [https://github.com/VictoriaMetrics/helm-charts#for-helm-v2](https://github.com/VictoriaMetrics/helm-charts#for-helm-v2)
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You need to add the VictoriaMetrics Helm repository to install VictoriaMetrics components. We’re going to use [VictoriaMetrics Cluster](https://docs.victoriametrics.com/Cluster-VictoriaMetrics.html). You can do this by running the following command:
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<div class="with-copy" markdown="1">
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```console
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helm repo add vm https://victoriametrics.github.io/helm-charts/
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```
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</div>
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Update Helm repositories:
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<div class="with-copy" markdown="1">
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```console
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helm repo update
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```
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</div>
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To verify that everything is set up correctly you may run this command:
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<div class="with-copy" markdown="1">
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```console
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helm search repo vm/
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```
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</div>
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The expected output is:
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```console
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NAME CHART VERSION APP VERSION DESCRIPTION
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vm/victoria-metrics-agent 0.7.20 v1.62.0 Victoria Metrics Agent - collects metrics from ...
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vm/victoria-metrics-alert 0.3.34 v1.62.0 Victoria Metrics Alert - executes a list of giv...
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vm/victoria-metrics-auth 0.2.23 1.62.0 Victoria Metrics Auth - is a simple auth proxy ...
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vm/victoria-metrics-cluster 0.8.32 1.62.0 Victoria Metrics Cluster version - high-perform...
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vm/victoria-metrics-k8s-stack 0.2.9 1.16.0 Kubernetes monitoring on VictoriaMetrics stack....
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vm/victoria-metrics-operator 0.1.17 0.16.0 Victoria Metrics Operator
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vm/victoria-metrics-single 0.7.5 1.62.0 Victoria Metrics Single version - high-performa...
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```
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## 2. Install VictoriaMetrics Cluster from the Helm chart
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Run this command in your terminal:
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<div class="with-copy" markdown="1">
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```yaml
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cat <<EOF | helm install vmcluster vm/victoria-metrics-cluster -f -
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vmselect:
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podAnnotations:
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prometheus.io/scrape: "true"
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prometheus.io/port: "8481"
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vminsert:
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podAnnotations:
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prometheus.io/scrape: "true"
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prometheus.io/port: "8480"
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vmstorage:
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podAnnotations:
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prometheus.io/scrape: "true"
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prometheus.io/port: "8482"
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EOF
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```
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</div>
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* By running `Helm install vmcluster vm/victoria-metrics-cluster` we install [VictoriaMetrics cluster](https://docs.victoriametrics.com/Cluster-VictoriaMetrics.html) to default [namespace](https://kubernetes.io/docs/concepts/overview/working-with-objects/namespaces/) inside your cluster.
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* By adding `podAnnotations: prometheus.io/scrape: "true"` we enable the scraping of metrics from the vmselect, vminsert and vmstorage pods.
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* By adding `podAnnotations:prometheus.io/port: "some_port" ` we enable the scraping of metrics from the vmselect, vminsert and vmstorage pods from their ports as well.
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As a result of this command you will see the following output:
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```console
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NAME: vmcluster
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LAST DEPLOYED: Thu Jul 1 09:41:57 2021
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NAMESPACE: default
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STATUS: deployed
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REVISION: 1
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TEST SUITE: None
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NOTES:
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Write API:
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The Victoria Metrics write api can be accessed via port 8480 with the following DNS name from within your cluster:
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vmcluster-victoria-metrics-cluster-vminsert.default.svc.cluster.local
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Get the Victoria Metrics insert service URL by running these commands in the same shell:
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export POD_NAME=$(kubectl get pods --namespace default -l "app=vminsert" -o jsonpath="{.items[0].metadata.name}")
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kubectl --namespace default port-forward $POD_NAME 8480
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You need to update your Prometheus configuration file and add the following lines to it:
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prometheus.yml
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remote_write:
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- url: "http://<insert-service>/insert/0/prometheus/"
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for example - inside the Kubernetes cluster:
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remote_write:
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- url: "http://vmcluster-victoria-metrics-cluster-vminsert.default.svc.cluster.local:8480/insert/0/prometheus/"
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Read API:
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The VictoriaMetrics read api can be accessed via port 8481 with the following DNS name from within your cluster:
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vmcluster-victoria-metrics-cluster-vmselect.default.svc.cluster.local
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Get the VictoriaMetrics select service URL by running these commands in the same shell:
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export POD_NAME=$(kubectl get pods --namespace default -l "app=vmselect" -o jsonpath="{.items[0].metadata.name}")
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kubectl --namespace default port-forward $POD_NAME 8481
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You will need to specify select service URL in your Grafana:
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NOTE: you need to use Prometheus Data Source
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Input this URL field in Grafana
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http://<select-service>/select/0/prometheus/
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for example - inside the Kubernetes cluster:
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http://vmcluster-victoria-metrics-cluster-vmselect.default.svc.cluster.local:8481/select/0/prometheus/"
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```
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For us it’s important to remember the url for the datasource (copy lines from the output).
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Verify that [VictoriaMetrics cluster](https://docs.victoriametrics.com/Cluster-VictoriaMetrics.html) pods are up and running by executing the following command:
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<div class="with-copy" markdown="1">
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```console
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kubectl get pods
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```
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</div>
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The expected output is:
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```console
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NAME READY STATUS RESTARTS AGE
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vmcluster-victoria-metrics-cluster-vminsert-689cbc8f55-95szg 1/1 Running 0 16m
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vmcluster-victoria-metrics-cluster-vminsert-689cbc8f55-f852l 1/1 Running 0 16m
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vmcluster-victoria-metrics-cluster-vmselect-977d74cdf-bbgp5 1/1 Running 0 16m
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vmcluster-victoria-metrics-cluster-vmselect-977d74cdf-vzp6z 1/1 Running 0 16m
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vmcluster-victoria-metrics-cluster-vmstorage-0 1/1 Running 0 16m
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vmcluster-victoria-metrics-cluster-vmstorage-1 1/1 Running 0 16m
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```
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## 3. Install vmagent from the Helm chart
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To scrape metrics from Kubernetes with a [VictoriaMetrics cluster](https://docs.victoriametrics.com/Cluster-VictoriaMetrics.html) we need to install [vmagent](https://docs.victoriametrics.com/vmagent.html) with additional configuration. To do so, please run these commands in your terminal:
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<div class="with-copy" markdown="1">
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```yaml
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helm install vmagent vm/victoria-metrics-agent -f https://docs.victoriametrics.com/guides/guide-vmcluster-vmagent-values.yaml
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```
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</div>
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Here is full file content `guide-vmcluster-vmagent-values.yaml`
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```yaml
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remoteWriteUrls:
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- http://vmcluster-victoria-metrics-cluster-vminsert.default.svc.cluster.local:8480/insert/0/prometheus/
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config:
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global:
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scrape_interval: 10s
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scrape_configs:
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- job_name: vmagent
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static_configs:
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- targets: ["localhost:8429"]
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- job_name: "kubernetes-apiservers"
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kubernetes_sd_configs:
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- role: endpoints
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scheme: https
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tls_config:
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ca_file: /var/run/secrets/kubernetes.io/serviceaccount/ca.crt
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insecure_skip_verify: true
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bearer_token_file: /var/run/secrets/kubernetes.io/serviceaccount/token
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relabel_configs:
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- source_labels:
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[
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__meta_kubernetes_namespace,
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__meta_kubernetes_service_name,
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__meta_kubernetes_endpoint_port_name,
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]
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action: keep
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regex: default;kubernetes;https
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- job_name: "kubernetes-nodes"
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scheme: https
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tls_config:
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ca_file: /var/run/secrets/kubernetes.io/serviceaccount/ca.crt
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insecure_skip_verify: true
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bearer_token_file: /var/run/secrets/kubernetes.io/serviceaccount/token
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kubernetes_sd_configs:
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- role: node
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relabel_configs:
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- action: labelmap
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regex: __meta_kubernetes_node_label_(.+)
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- target_label: __address__
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replacement: kubernetes.default.svc:443
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- source_labels: [__meta_kubernetes_node_name]
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regex: (.+)
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target_label: __metrics_path__
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replacement: /api/v1/nodes/$1/proxy/metrics
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- job_name: "kubernetes-nodes-cadvisor"
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scheme: https
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tls_config:
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ca_file: /var/run/secrets/kubernetes.io/serviceaccount/ca.crt
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insecure_skip_verify: true
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bearer_token_file: /var/run/secrets/kubernetes.io/serviceaccount/token
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kubernetes_sd_configs:
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- role: node
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relabel_configs:
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- action: labelmap
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regex: __meta_kubernetes_node_label_(.+)
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- target_label: __address__
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replacement: kubernetes.default.svc:443
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- source_labels: [__meta_kubernetes_node_name]
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regex: (.+)
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target_label: __metrics_path__
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replacement: /api/v1/nodes/$1/proxy/metrics/cadvisor
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metric_relabel_configs:
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- action: replace
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source_labels: [pod]
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regex: '(.+)'
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target_label: pod_name
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replacement: '${1}'
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- action: replace
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source_labels: [container]
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regex: '(.+)'
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target_label: container_name
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replacement: '${1}'
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- action: replace
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target_label: name
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replacement: k8s_stub
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- action: replace
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source_labels: [id]
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regex: '^/system\.slice/(.+)\.service$'
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target_label: systemd_service_name
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replacement: '${1}'
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- job_name: "kubernetes-service-endpoints"
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kubernetes_sd_configs:
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- role: endpoints
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relabel_configs:
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- action: drop
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source_labels: [__meta_kubernetes_pod_container_init]
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regex: true
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- action: keep_if_equal
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source_labels: [__meta_kubernetes_pod_annotation_prometheus_io_port, __meta_kubernetes_pod_container_port_number]
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- source_labels:
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[__meta_kubernetes_service_annotation_prometheus_io_scrape]
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action: keep
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regex: true
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- source_labels:
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[__meta_kubernetes_service_annotation_prometheus_io_scheme]
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action: replace
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target_label: __scheme__
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regex: (https?)
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- source_labels:
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[__meta_kubernetes_service_annotation_prometheus_io_path]
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action: replace
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target_label: __metrics_path__
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regex: (.+)
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- source_labels:
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[
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__address__,
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__meta_kubernetes_service_annotation_prometheus_io_port,
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]
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action: replace
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target_label: __address__
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regex: ([^:]+)(?::\d+)?;(\d+)
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replacement: $1:$2
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- action: labelmap
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regex: __meta_kubernetes_service_label_(.+)
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- source_labels: [__meta_kubernetes_namespace]
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action: replace
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target_label: kubernetes_namespace
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- source_labels: [__meta_kubernetes_service_name]
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action: replace
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target_label: kubernetes_name
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- source_labels: [__meta_kubernetes_pod_node_name]
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action: replace
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target_label: kubernetes_node
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- job_name: "kubernetes-service-endpoints-slow"
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scrape_interval: 5m
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scrape_timeout: 30s
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kubernetes_sd_configs:
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- role: endpoints
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relabel_configs:
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- action: drop
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source_labels: [__meta_kubernetes_pod_container_init]
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regex: true
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- action: keep_if_equal
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source_labels: [__meta_kubernetes_pod_annotation_prometheus_io_port, __meta_kubernetes_pod_container_port_number]
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- source_labels:
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[__meta_kubernetes_service_annotation_prometheus_io_scrape_slow]
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action: keep
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regex: true
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- source_labels:
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[__meta_kubernetes_service_annotation_prometheus_io_scheme]
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action: replace
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target_label: __scheme__
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regex: (https?)
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- source_labels:
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[__meta_kubernetes_service_annotation_prometheus_io_path]
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action: replace
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target_label: __metrics_path__
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regex: (.+)
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- source_labels:
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[
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__address__,
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__meta_kubernetes_service_annotation_prometheus_io_port,
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]
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action: replace
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target_label: __address__
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regex: ([^:]+)(?::\d+)?;(\d+)
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replacement: $1:$2
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- action: labelmap
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regex: __meta_kubernetes_service_label_(.+)
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- source_labels: [__meta_kubernetes_namespace]
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action: replace
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target_label: kubernetes_namespace
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- source_labels: [__meta_kubernetes_service_name]
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action: replace
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target_label: kubernetes_name
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- source_labels: [__meta_kubernetes_pod_node_name]
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action: replace
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target_label: kubernetes_node
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- job_name: "kubernetes-services"
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metrics_path: /probe
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params:
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module: [http_2xx]
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kubernetes_sd_configs:
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- role: service
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relabel_configs:
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- source_labels:
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[__meta_kubernetes_service_annotation_prometheus_io_probe]
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action: keep
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regex: true
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- source_labels: [__address__]
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target_label: __param_target
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- target_label: __address__
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replacement: blackbox
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- source_labels: [__param_target]
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target_label: instance
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- action: labelmap
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regex: __meta_kubernetes_service_label_(.+)
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- source_labels: [__meta_kubernetes_namespace]
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target_label: kubernetes_namespace
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- source_labels: [__meta_kubernetes_service_name]
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target_label: kubernetes_name
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- job_name: "kubernetes-pods"
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kubernetes_sd_configs:
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- role: pod
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relabel_configs:
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- action: drop
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source_labels: [__meta_kubernetes_pod_container_init]
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regex: true
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- action: keep_if_equal
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source_labels: [__meta_kubernetes_pod_annotation_prometheus_io_port, __meta_kubernetes_pod_container_port_number]
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- source_labels: [__meta_kubernetes_pod_annotation_prometheus_io_scrape]
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action: keep
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regex: true
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- source_labels: [__meta_kubernetes_pod_annotation_prometheus_io_path]
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action: replace
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target_label: __metrics_path__
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regex: (.+)
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- source_labels:
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[__address__, __meta_kubernetes_pod_annotation_prometheus_io_port]
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action: replace
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regex: ([^:]+)(?::\d+)?;(\d+)
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replacement: $1:$2
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target_label: __address__
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- action: labelmap
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regex: __meta_kubernetes_pod_label_(.+)
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- source_labels: [__meta_kubernetes_namespace]
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action: replace
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target_label: kubernetes_namespace
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- source_labels: [__meta_kubernetes_pod_name]
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action: replace
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target_label: kubernetes_pod_name
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```
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* By adding `remoteWriteUrls: - http://vmcluster-victoria-metrics-cluster-vminsert.default.svc.cluster.local:8480/insert/0/prometheus/` we configuring [vmagent](https://docs.victoriametrics.com/vmagent.html) to write scraped metrics into the `vmselect service`.
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* The second part of this yaml file is needed to add the `metric_relabel_configs` section that helps us to show Kubernetes metrics on the Grafana dashboard.
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Verify that `vmagent`'s pod is up and running by executing the following command:
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<div class="with-copy" markdown="1">
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```console
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kubectl get pods | grep vmagent
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```
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</div>
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The expected output is:
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```console
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vmagent-victoria-metrics-agent-69974b95b4-mhjph 1/1 Running 0 11m
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```
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## 4. Install and connect Grafana to VictoriaMetrics with Helm
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|
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Add the Grafana Helm repository.
|
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|
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<div class="with-copy" markdown="1">
|
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|
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```console
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helm repo add grafana https://grafana.github.io/helm-charts
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helm repo update
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```
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</div>
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See more information on Grafana ArtifactHUB [https://artifacthub.io/packages/helm/grafana/grafana](https://artifacthub.io/packages/helm/grafana/grafana)
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To install the chart with the release name `my-grafana`, add the VictoriaMetrics datasource with official dashboard and the Kubernetes dashboard:
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<div class="with-copy" markdown="1">
|
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|
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```yaml
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cat <<EOF | helm install my-grafana grafana/grafana -f -
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datasources:
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datasources.yaml:
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apiVersion: 1
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datasources:
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- name: victoriametrics
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type: prometheus
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orgId: 1
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url: http://vmcluster-victoria-metrics-cluster-vmselect.default.svc.cluster.local:8481/select/0/prometheus/
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access: proxy
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isDefault: true
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updateIntervalSeconds: 10
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editable: true
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dashboardProviders:
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dashboardproviders.yaml:
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apiVersion: 1
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providers:
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- name: 'default'
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orgId: 1
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folder: ''
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type: file
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disableDeletion: true
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editable: true
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options:
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path: /var/lib/grafana/dashboards/default
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dashboards:
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default:
|
||
victoriametrics:
|
||
gnetId: 11176
|
||
revision: 18
|
||
datasource: victoriametrics
|
||
vmagent:
|
||
gnetId: 12683
|
||
revision: 7
|
||
datasource: victoriametrics
|
||
kubernetes:
|
||
gnetId: 14205
|
||
revision: 1
|
||
datasource: victoriametrics
|
||
EOF
|
||
```
|
||
</div>
|
||
|
||
By running this command we:
|
||
* Install Grafana from the Helm repository.
|
||
* Provision a VictoriaMetrics data source with the url from the output above which we remembered.
|
||
* Add this [https://grafana.com/grafana/dashboards/11176-victoriametrics-cluster/](https://grafana.com/grafana/dashboards/11176-victoriametrics-cluster/) dashboard for [VictoriaMetrics Cluster](https://docs.victoriametrics.com/Cluster-VictoriaMetrics.html).
|
||
* Add this [https://grafana.com/grafana/dashboards/12683-victoriametrics-vmagent/](https://grafana.com/grafana/dashboards/12683-victoriametrics-vmagent/) dashboard for [VictoriaMetrics Agent](https://docs.victoriametrics.com/vmagent.html).
|
||
* Add this [https://grafana.com/grafana/dashboards/14205-kubernetes-cluster-monitoring-via-prometheus/](https://grafana.com/grafana/dashboards/14205-kubernetes-cluster-monitoring-via-prometheus/) dashboard to see Kubernetes cluster metrics.
|
||
|
||
|
||
Please see the output log in your terminal. Copy, paste and run these commands.
|
||
The first one will show `admin` password for the Grafana admin.
|
||
The second and the third will forward Grafana to `127.0.0.1:3000`:
|
||
|
||
<div class="with-copy" markdown="1">
|
||
|
||
```console
|
||
kubectl get secret --namespace default my-grafana -o jsonpath="{.data.admin-password}" | base64 --decode ; echo
|
||
|
||
export POD_NAME=$(kubectl get pods --namespace default -l "app.kubernetes.io/name=grafana,app.kubernetes.io/instance=my-grafana" -o jsonpath="{.items[0].metadata.name}")
|
||
|
||
kubectl --namespace default port-forward $POD_NAME 3000
|
||
```
|
||
</div>
|
||
|
||
## 5. Check the result you obtained in your browser
|
||
|
||
To check that [VictoriaMetrics](https://victoriametrics.com) collects metrics from k8s cluster open in browser [http://127.0.0.1:3000/dashboards](http://127.0.0.1:3000/dashboards) and choose the `Kubernetes Cluster Monitoring (via Prometheus)` dashboard. Use `admin` for login and `password` that you previously got from kubectl.
|
||
|
||
<p align="center">
|
||
<img src="guide-vmcluster-dashes-agent.png" width="800" alt="grafana dashboards">
|
||
</p>
|
||
|
||
You will see something like this:
|
||
<p align="center">
|
||
<img src="guide-vmcluster-k8s-dashboard.png" width="800" alt="Kubernetes metrics provided by vmcluster">
|
||
</p>
|
||
|
||
The VictoriaMetrics dashboard is also available to use:
|
||
<p align="center">
|
||
<img src="guide-vmcluster-grafana-dash.png" width="800" alt="VictoriaMetrics cluster dashboard">
|
||
</p>
|
||
|
||
vmagent has it’s own dashboard:
|
||
<p align="center">
|
||
<img src="guide-vmcluster-vmagent-grafana-dash.png" width="800" alt="vmagent dashboard">
|
||
</p>
|
||
|
||
## 6. Final thoughts
|
||
|
||
* We set up TimeSeries Database for your Kubernetes cluster.
|
||
* We collected metrics from all running pods,nodes, … and stored them in a VictoriaMetrics database.
|
||
* We visualized resources used in the Kubernetes cluster by using Grafana dashboards.
|