elastic-jakarta-meetup-feb-2023

deploy elastic operator

kubectl create -f https://download.elastic.co/downloads/eck/2.6.1/crds.yaml
kubectl apply -f https://download.elastic.co/downloads/eck/2.6.1/operator.yaml

you can skip if you already have elastic operator installed

Deploy single-node elasticsearch

cat <<EOF | kubectl apply -f -
apiVersion: elasticsearch.k8s.elastic.co/v1
kind: Elasticsearch
metadata:
  name: my-elastic
spec:
  version: 8.5.0
  nodeSets:
  - name: default
    count: 1
    config:
      node.store.allow_mmap: false
EOF

add kibana

cat <<EOF | kubectl apply -f -
apiVersion: kibana.k8s.elastic.co/v1
kind: Kibana
metadata:
  name: my-kibana
spec:
  version: 8.5.0
  count: 1
  elasticsearchRef:
    name: my-elastic
EOF

Login to Kibana

get elastic password

kubectl get secret/es-meetup-es-elastic-user --template={{.data.elastic}} | base64 

get Kibana IP

kubectl get pod -o wide
kubectl get svc/kibana-kb-http --no-headers | awk '{print $4}'

Scaling Out Elasticsearch

kubectl edit elasticsearch/es-meetup and change count: 1 to count: 3

or edit 01.elastic-deployment.yaml and change count: 1 to count: 3

vim 01.elastic-deployment.yaml
change 'count: 1' to 'count: 3'
kubectl apply -f 01.elastic-deployment.yaml

Enable Observability

create cluster role & role binding for elastic-agent and fleet server

kubectl apply -f 03.rbac-elastic-agent.yaml

add fleet server

kubectl apply -f 04.fleet-server.yaml

add elastic-agent

kubectl apply -f 05.elastic-agent.yaml

Upgrade the cluster

change version in every yaml file from 8.5.0 to 8.6.1

More Configuration

Persistent Volume

this deployment doesn't have a persistent data. If you delete the cluster, the data will be deleted along with the cluster. To retain the data you need to specify volumeClaim from Kubernetes

you can add this configuration on 01.elastic-deployment.yaml in line 12

    volumeClaimTemplates:
    - metadata:
        name: elasticsearch-data 
      spec:
        accessModes:
        - ReadWriteOnce
        resources:
          requests:
            storage: 5Gi
        storageClassName: standard