After the Oracle Unified Directory Services Manager instance is set up you can monitor it using Prometheus and Grafana.
Create a Kubernetes namespace to provide a scope for Prometheus and Grafana objects such as pods and services that you create in the environment. To create your namespace issue the following command:
$ kubectl create ns mypgns
namespace/mypgns created
Add the Prometheus and Grafana Helm repositories by issuing the following commands:
$ helm repo add prometheus https://prometheus-community.github.io/helm-charts
"prometheus" has been added to your repositories
$ helm repo update
Hang tight while we grab the latest from your chart repositories...
...Successfully got an update from the "prometheus" chart repository
Update Complete. Happy Helming!
$
Install the Prometheus Operator using the helm command:
$
helm install <release_name> prometheus/kube-prometheus-stack grafana.adminPassword=<password> -n <namespace>
For example:
$ helm install mypg prometheus/kube-prometheus-stack grafana.adminPassword=<password> -n mypgns
Output should be similar to the following:
NAME: mypg
LAST DEPLOYED: Mon Oct 12 02:05:41 2020
NAMESPACE: mypgns
STATUS: deployed
REVISION: 1
NOTES:
kube-prometheus-stack has been installed. Check its status by running:
kubectl --namespace mypgns get pods -l "release=mypg"
Visit https://github.com/prometheus-operator/kube-prometheus for instructions on how to create & configure Alertmanager and Prometheus instances using the Operator.
View the objects created for Prometheus and Grafana by issuing the following command:
$ kubectl get all,service,pod -o wide -n <namespace>
For example:
$ kubectl get all,service,pod -o wide -n mypgns
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
pod/alertmanager-mypg-kube-prometheus-stack-alertmanager-0 2/2 Running 0 25m 10.244.1.25 10.89.73.203 <none> <none>
pod/mypg-grafana-b7d4fbfb-jzccm 2/2 Running 0 25m 10.244.2.140 10.89.73.204 <none> <none>
pod/mypg-kube-prometheus-stack-operator-7fb485bbcd-lbh9d 2/2 Running 0 25m 10.244.2.139 10.89.73.204 <none> <none>
pod/mypg-kube-state-metrics-86dfdf9c75-nvbss 1/1 Running 0 25m 10.244.1.146 10.89.73.203 <none> <none>
pod/mypg-prometheus-node-exporter-29dzd 1/1 Running 0 25m 10.244.2.141 10.89.73.204 <none> <none>
pod/prometheus-mypg-kube-prometheus-stack-prometheus-0 3/3 Running 0 25m 10.244.2.142 10.89.73.203 <none> <none>
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE SELECTOR
service/alertmanager-operated ClusterIP None <none> 9093/TCP,9094/TCP,9094/UDP 25m app=alertmanager
service/mypg-grafana ClusterIP 10.111.28.76 <none> 80/TCP 25m app.kubernetes.io/instance=mypg,app.kubernetes.io/name=grafana
service/mypg-kube-prometheus-stack-alertmanager ClusterIP 10.103.83.97 <none> 9093/TCP 25m alertmanager=mypg-kube-prometheus-stack-alertmanager,app=alertmanager
service/mypg-kube-prometheus-stack-operator ClusterIP 10.110.216.204 <none> 8080/TCP,443/TCP 25m app=kube-prometheus-stack-operator,release=mypg
service/mypg-kube-prometheus-stack-prometheus ClusterIP 10.104.11.9 <none> 9090/TCP 25m app=prometheus,prometheus=mypg-kube-prometheus-stack-prometheus
service/mypg-kube-state-metrics ClusterIP 10.109.172.125 <none> 8080/TCP 25m app.kubernetes.io/instance=mypg,app.kubernetes.io/name=kube-state-metrics
service/mypg-prometheus-node-exporter ClusterIP 10.110.249.92 <none> 9100/TCP 25m app=prometheus-node-exporter,release=mypg
service/prometheus-operated ClusterIP None <none> 9090/TCP 25m app=prometheus
NAME DESIRED CURRENT READY UP-TO-DATE AVAILABLE NODE SELECTOR AGE CONTAINERS IMAGES SELECTOR
daemonset.apps/mypg-prometheus-node-exporter 3 3 0 3 0 <none> 25m node-exporter quay.io/prometheus/node-exporter:v1.0.1 app=prometheus-node-exporter,release=mypg
NAME READY UP-TO-DATE AVAILABLE AGE CONTAINERS IMAGES SELECTOR
deployment.apps/mypg-grafana 1/1 1 1 25m grafana-sc-dashboard,grafana kiwigrid/k8s-sidecar:0.1.209,grafana/grafana:7.2.0 app.kubernetes.io/instance=mypg,app.kubernetes.io/name=grafana
deployment.apps/mypg-kube-prometheus-stack-operator 1/1 1 1 25m kube-prometheus-stack,tls-proxy quay.io/prometheus-operator/prometheus-operator:v0.42.1,squareup/ghostunnel:v1.5.2 app=kube-prometheus-stack-operator,release=mypg
deployment.apps/mypg-kube-state-metrics 1/1 1 1 25m kube-state-metrics quay.io/coreos/kube-state-metrics:v1.9.7 app.kubernetes.io/name=kube-state-metrics
NAME DESIRED CURRENT READY AGE CONTAINERS IMAGES SELECTOR
replicaset.apps/mypg-grafana-b7d4fbfb 1 1 1 25m grafana-sc-dashboard,grafana kiwigrid/k8s-sidecar:0.1.209,grafana/grafana:7.2.0 app.kubernetes.io/instance=mypg,app.kubernetes.io/name=grafana,pod-template-hash=b7d4fbfb
replicaset.apps/mypg-kube-prometheus-stack-operator-7fb485bbcd 1 1 1 25m kube-prometheus-stack,tls-proxy quay.io/prometheus-operator/prometheus-operator:v0.42.1,squareup/ghostunnel:v1.5.2 app=kube-prometheus-stack-operator,pod-template-hash=7fb485bbcd,release=mypg
replicaset.apps/mypg-kube-state-metrics-86dfdf9c75 1 1 1 25m kube-state-metrics quay.io/coreos/kube-state-metrics:v1.9.7 app.kubernetes.io/name=kube-state-metrics,pod-template-hash=86dfdf9c75
NAME READY AGE CONTAINERS IMAGES
statefulset.apps/alertmanager-mypg-kube-prometheus-stack-alertmanager 1/1 25m alertmanager,config-reloader quay.io/prometheus/alertmanager:v0.21.0,jimmidyson/configmap-reload:v0.4.0
statefulset.apps/prometheus-mypg-kube-prometheus-stack-prometheus 0/1 25m prometheus,prometheus-config-reloader,rules-configmap-reloader quay.io/prometheus/prometheus:v2.21.0,quay.io/prometheus-operator/prometheus-config-reloader:v0.42.1,docker.io/jimmidyson/configmap-reload:v0.4.0
Edit the grafana service to add the NodePort in the service.nodeport=<nodeport> and type=NodePort and save:
$ kubectl edit service/prometheus-grafana -n <namespace>
ports:
- name: service
nodePort: 30091
port: 80
protocol: TCP
targetPort: 3000
selector:
app.kubernetes.io/instance: prometheus-operator
app.kubernetes.io/name: grafana
sessionAffinity: None
type: NodePort
Access the Grafana GUI using http://<HostIP>:<nodeport> with the default username=admin and password=grafana.adminPassword:
Check the Prometheus datasource from the DataSource pane:
Add the customized k8cluster view dashboard json to view the cluster monitoring dashboard, by importing the following json file.
Download the JSON file from monitoring a Kubernetes cluster using Prometheus from https://grafana.com/grafana/dashboards/10856. Import the downloaded json using the import option.
Verify your installation by viewing some of the customized dashboard views.