MicroK8s : Enable Prometheus2020/08/17 |
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Enable Prometheus add-on to monitor metrics on MicroK8s Cluster.
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| [1] | Enable built-in Prometheus add-on on primary Node. |
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[root@dlp ~]# microk8s enable prometheus dashboard dns Enabling Prometheus namespace/monitoring created customresourcedefinition.apiextensions.k8s.io/alertmanagers.monitoring.coreos.com created customresourcedefinition.apiextensions.k8s.io/podmonitors.monitoring.coreos.com created customresourcedefinition.apiextensions.k8s.io/prometheuses.monitoring.coreos.com created customresourcedefinition.apiextensions.k8s.io/prometheusrules.monitoring.coreos.com created customresourcedefinition.apiextensions.k8s.io/servicemonitors.monitoring.coreos.com created ..... ..... rolebinding.rbac.authorization.k8s.io/kubernetes-dashboard created clusterrolebinding.rbac.authorization.k8s.io/kubernetes-dashboard created deployment.apps/kubernetes-dashboard created service/dashboard-metrics-scraper created deployment.apps/dashboard-metrics-scraper created If RBAC is not enabled access the dashboard using the default token retrieved with: token=$(microk8s kubectl -n kube-system get secret | grep default-token | cut -d " " -f1) microk8s kubectl -n kube-system describe secret $token In an RBAC enabled setup (microk8s enable RBAC) you need to create a user with restricted permissions as shown in: https://github.com/kubernetes/dashboard/blob/master/docs/user/access-control/creating-sample-user.md Addon dns is already enabled.[root@dlp ~]# microk8s kubectl get services -n monitoring NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE alertmanager-main ClusterIP 10.152.183.122 <none> 9093/TCP 57s alertmanager-operated ClusterIP None <none> 9093/TCP,9094/TCP,9094/UDP 39s grafana ClusterIP 10.152.183.161 <none> 3000/TCP 57s kube-state-metrics ClusterIP None <none> 8443/TCP,9443/TCP 57s node-exporter ClusterIP None <none> 9100/TCP 56s prometheus-adapter ClusterIP 10.152.183.34 <none> 443/TCP 56s prometheus-k8s ClusterIP 10.152.183.217 <none> 9090/TCP 56s prometheus-operated ClusterIP None <none> 9090/TCP 29s prometheus-operator ClusterIP None <none> 8080/TCP 61s[root@dlp ~]# microk8s kubectl get pods -n monitoring NAME READY STATUS RESTARTS AGE alertmanager-main-0 2/2 Running 0 83s grafana-fbb6785d5-c275s 1/1 Running 0 100s kube-state-metrics-dcc94d9f8-pj87s 3/3 Running 0 99s node-exporter-d48hw 2/2 Running 0 99s prometheus-adapter-5949969998-bgznt 1/1 Running 0 100s prometheus-k8s-0 3/3 Running 1 73s prometheus-operator-5c7dcf954-f982j 1/1 Running 0 103s # set port-forwarding to enable external access # Prometheus UI [root@dlp ~]# microk8s kubectl port-forward -n monitoring service/prometheus-k8s --address 0.0.0.0 9090:9090 Forwarding from 0.0.0.0:9090 -> 9090 # Grafana UI [root@dlp ~]# microk8s kubectl port-forward -n monitoring service/grafana --address 0.0.0.0 3000:3000 Forwarding from 0.0.0.0:3000 -> 3000 # if Firewalld is running, allow ports [root@dlp ~]# firewall-cmd --add-port={9090/tcp,3000/tcp} --permanent [root@dlp ~]# firewall-cmd --reload |
| [2] | Access to [https://(MicroK8s primary node's Hostname or IP address):(setting port)] with an web browser on a Client computer in local network.
Then, that's OK if following Prometheus or Grafana UI is shown. For default user/password on Grafana, it [admin/admin]. |
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