You are looking at the documentation of a prior release. To read the documentation of the latest release, please
visit here.
Configure Elasticsearch JVM Options
The Elasticsearch offers users to configure the JVM settings by using jvm.options file. The jvm.options file located at the $ES_HOME/config (ie. /usr/share/elasticsearch/config) directory.
Deploy Elasticsearch with Custom jvm.options File
Before deploying the Elasticsearch instance, you need to create a k8s secret with the custom config files (here: jvm.options).
apiVersion: v1
kind: Secret
metadata:
name: es-custom-config
namespace: demo
stringData:
jvm.options: |-
## G1GC Configuration
10-:-XX:+UseG1GC
10-13:-XX:-UseConcMarkSweepGC
10-13:-XX:-UseCMSInitiatingOccupancyOnly
10-:-XX:G1ReservePercent=25
10-:-XX:InitiatingHeapOccupancyPercent=30
## JVM temporary directory
-Djava.io.tmpdir=${ES_TMPDIR}
## heap dumps
# generate a heap dump when an allocation from the Java heap fails
# heap dumps are created in the working directory of the JVM
-XX:+HeapDumpOnOutOfMemoryError
# specify an alternative path for heap dumps; ensure the directory exists and
# has sufficient space
-XX:HeapDumpPath=data
# specify an alternative path for JVM fatal error logs
-XX:ErrorFile=logs/hs_err_pid%p.log
# JDK 9+ GC logging
9-:-Xlog:gc*,gc+age=trace,safepoint:file=logs/gc.log:utctime,pid,tags:filecount=32,filesize=64m
If you want to provide node-role specific settings, say you want to configure ingest nodes with a different setting than others in a topology cluster, add node role as a prefix in the file name.
stringData:
ingest-jvm.options: |-
... ...
master-jvm.options: |-
... ...
... ...
Deploy the k8s secret:
kubectl apply -f https://github.com/kubedb/docs/raw/v2023.02.28/docs/guides/elasticsearch/configuration/jvm-options/yamls/custom-config.yaml
secret/es-custom-config created
Now Deploy the Elasticsearch Cluster with the custom jvm.options file:
apiVersion: kubedb.com/v1alpha2
kind: Elasticsearch
metadata:
name: es-test
namespace: demo
spec:
# Make sure that you've mentioned the config secret name here
configSecret:
name: es-custom-config
enableSSL: false
version: opendistro-1.12.0
storageType: Durable
terminationPolicy: WipeOut
topology:
master:
suffix: master
replicas: 3
storage:
storageClassName: "standard"
accessModes:
- ReadWriteOnce
resources:
requests:
storage: 1Gi
data:
suffix: data
replicas: 2
storage:
storageClassName: "standard"
accessModes:
- ReadWriteOnce
resources:
requests:
storage: 5Gi
ingest:
suffix: ingest
replicas: 2
storage:
storageClassName: "standard"
accessModes:
- ReadWriteOnce
resources:
requests:
storage: 1Gi
Deploy Elasticsearch:
$ kubectl apply -f https://github.com/kubedb/docs/raw/v2023.02.28/docs/guides/elasticsearch/configuration/jvm-options/yamls/elasticsearch.yaml
elasticsearch/es-test created
Wait for the Elasticsearch to become ready:
$ kubectl get elasticsearch -n demo -w
NAME VERSION STATUS AGE
es-test opendistro-1.12.0 Provisioning 12s
es-test opendistro-1.12.0 Provisioning 2m2s
es-test opendistro-1.12.0 Ready 2m2s