kubernetes

Helm install OpenSearch Cluster with persistence to local disk + Hunspell

Patrik Kőlbl

• 4 min read
Helm install OpenSearch Cluster with persistence to local disk + Hunspell
local-storage Bound

kubectl apply -f values.yaml

values.yaml

# Only create this for K8s 1.9+

apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
  name: local-storage
provisioner: kubernetes.io/no-provisioner
volumeBindingMode: WaitForFirstConsumer
# Supported policies: Delete, Retain
reclaimPolicy: Retain

---
apiVersion: v1
kind: PersistentVolume
metadata:
  name: opensearch-agent-1
spec:
  accessModes:
  - ReadWriteOnce
  capacity:
    storage: 10Gi
  local:
    path: /usr/share/opensearch/data
  nodeAffinity:
    required:
      nodeSelectorTerms:
      - matchExpressions:
        - key: kubernetes.io/hostname
          operator: In
          values:
          - rke2-agent-1
  persistentVolumeReclaimPolicy: Retain
  storageClassName: local-storage
  volumeMode: Filesystem
---
apiVersion: v1
kind: PersistentVolume
metadata:
  name: opensearch-agent-2
spec:
  accessModes:
  - ReadWriteOnce
  capacity:
    storage: 10Gi
  local:
    path: /usr/share/opensearch/data
  nodeAffinity:
    required:
      nodeSelectorTerms:
      - matchExpressions:
        - key: kubernetes.io/hostname
          operator: In
          values:
          - rke2-agent-2
  persistentVolumeReclaimPolicy: Retain
  storageClassName: local-storage
  volumeMode: Filesystem
---
apiVersion: v1
kind: PersistentVolume
metadata:
  name: opensearch-agent-3
spec:
  accessModes:
  - ReadWriteOnce
  capacity:
    storage: 10Gi
  local:
    path: /usr/share/opensearch/data
  nodeAffinity:
    required:
      nodeSelectorTerms:
      - matchExpressions:
        - key: kubernetes.io/hostname
          operator: In
          values:
          - rke2-agent-3
  persistentVolumeReclaimPolicy: Retain
  storageClassName: local-storage
  volumeMode: Filesystem
# on all nodes labeled rke2-agent-1, rke2-agent-2, rke2-agent-3
mkdir -p /usr/share/opensearch/data

$ helm repo add opensearch https://opensearch-project.github.io/helm-charts/
$ helm repo update
$ helm install --namespace opensearch -f values.yaml opensearch/opensearch

values.yaml


antiAffinity: soft
antiAffinityTopologyKey: kubernetes.io/hostname
clusterName: opensearch-cluster
config:
  opensearch.yml: >
    cluster.name: opensearch-cluster


    # Bind to all interfaces because we don't know what IP address Docker will
    assign to us.

    network.host: 0.0.0.0


    # Setting network.host to a non-loopback address enables the annoying
    bootstrap checks. "Single-node" mode disables them again.

    # Implicitly done if ".singleNode" is set to "true".

    # discovery.type: single-node
enableServiceLinks: true
envFrom: []
extraContainers: []
extraEnvs:
  - name: DISABLE_INSTALL_DEMO_CONFIG
    value: 'true'
  - name: DISABLE_SECURITY_PLUGIN
    value: 'true'
extraInitContainers:
  - command:
      - cp
      - '-R'
      - /usr/share/elasticsearch/config/hunspell/
      - /data/
    image: insekticid/elasticsearch-hunspell
    name: hunspell
    volumeMounts:
      - mountPath: /data/hunspell/
        name: shared-data
  - command:
      - sysctl
      - '-w'
      - vm.max_map_count=262144
    image: busybox:latest
    name: ini-sysctl
    securityContext:
      privileged: true
      runAsUser: 0
extraObjects: []
extraVolumeMounts:
  - mountPath: /usr/share/opensearch/config/hunspell/
    name: shared-data
extraVolumes:
  - emptyDir: {}
    name: shared-data
fsGroup: ''
fullnameOverride: ''
global:
  dockerRegistry: ''
  cattle:
    systemProjectId: p-frfbh
hostAliases: []
httpPort: 9200
image:
  pullPolicy: IfNotPresent
  repository: opensearchproject/opensearch
  tag: ''
imagePullSecrets: []
ingress:
  annotations: {}
  enabled: false
  hosts:
    - chart-example.local
  path: /
  tls: []
initResources: {}
keystore: []
labels: {}
lifecycle: {}
livenessProbe: {}
majorVersion: ''
masterService: opensearch-cluster-master
masterTerminationFix: false
maxUnavailable: 1
nameOverride: ''
networkHost: 0.0.0.0
networkPolicy:
  create: false
  http:
    enabled: false
nodeAffinity: {}
nodeGroup: master
nodeSelector: {}
opensearchHome: /usr/share/opensearch
opensearchJavaOpts: '-Xmx512M -Xms512M'
persistence:
  accessModes:
    - ReadWriteOnce
  annotations: {}
  enableInitChown: true
  enabled: true
  labels:
    enabled: true
  size: 8Gi
  storageClass: local-storage
plugins:
  enabled: true
  installList:
    - analysis-icu
    - analysis-phonetic
podAnnotations: {}
podManagementPolicy: Parallel
podSecurityContext:
  fsGroup: 1000
  runAsUser: 1000
podSecurityPolicy:
  create: false
  name: ''
  spec:
    fsGroup:
      rule: RunAsAny
    privileged: true
    runAsUser:
      rule: RunAsAny
    seLinux:
      rule: RunAsAny
    supplementalGroups:
      rule: RunAsAny
    volumes:
      - secret
      - configMap
      - persistentVolumeClaim
      - emptyDir
priorityClassName: ''
protocol: https
rbac:
  create: false
  serviceAccountAnnotations: {}
  serviceAccountName: ''
readinessProbe:
  failureThreshold: 3
  periodSeconds: 5
  tcpSocket:
    port: 9200
  timeoutSeconds: 3
replicas: 3
resources:
  requests:
    cpu: 1000m
    memory: 100Mi
roles:
  - master
  - ingest
  - data
  - remote_cluster_client
schedulerName: ''
secretMounts: []
securityConfig:
  actionGroupsSecret: null
  config:
    data: {}
    dataComplete: true
    securityConfigSecret: ''
  configSecret: null
  enabled: true
  internalUsersSecret: null
  path: /usr/share/opensearch/plugins/opensearch-security/securityconfig
  rolesMappingSecret: null
  rolesSecret: null
  tenantsSecret: null
securityContext:
  capabilities:
    drop:
      - ALL
  runAsNonRoot: true
  runAsUser: 1000
service:
  annotations: {}
  externalTrafficPolicy: ''
  headless:
    annotations: {}
  httpPortName: http
  labels: {}
  labelsHeadless: {}
  loadBalancerIP: ''
  loadBalancerSourceRanges: []
  nodePort: ''
  transportPortName: transport
  type: ClusterIP
sidecarResources: {}
singleNode: false
startupProbe:
  failureThreshold: 30
  initialDelaySeconds: 5
  periodSeconds: 10
  tcpSocket:
    port: 9200
  timeoutSeconds: 3
sysctl:
  enabled: false
sysctlInit:
  enabled: false
sysctlVmMaxMapCount: 262144
terminationGracePeriod: 120
tolerations: []
topologySpreadConstraints: []
transportPort: 9300
updateStrategy: RollingUpdate

Valkey / redis local-storage config for Bitnami

  • mkdir -p /bitnami/valkey/recipes/data
  • mkdir -p /bitnami/valkey/recipes/slave-data
  • chmod -R 0777 /bitnami/valkey
  • chown -R 1001:1001 /bitnami/valkey
apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
  name: local-storage
provisioner: kubernetes.io/no-provisioner
volumeBindingMode: WaitForFirstConsumer
# Supported policies: Delete, Retain
reclaimPolicy: Retain

---
apiVersion: v1
kind: PersistentVolume
metadata:
  name: valkey-data-valkey-master-1
spec:
  accessModes:
  - ReadWriteOnce
  capacity:
    storage: 10Gi
  local:
    path: /bitnami/valkey/recipes/data
  nodeAffinity:
    required:
      nodeSelectorTerms:
      - matchExpressions:
        - key: kubernetes.io/hostname
          operator: In
          values:
          - rke2-agent-1
  persistentVolumeReclaimPolicy: Retain
  storageClassName: local-storage
  volumeMode: Filesystem
---
apiVersion: v1
kind: PersistentVolume
metadata:
  name: valkey-data-valkey-master-2
spec:
  accessModes:
  - ReadWriteOnce
  capacity:
    storage: 10Gi
  local:
    path: /bitnami/valkey/recipes/data
  nodeAffinity:
    required:
      nodeSelectorTerms:
      - matchExpressions:
        - key: kubernetes.io/hostname
          operator: In
          values:
          - rke2-agent-2
  persistentVolumeReclaimPolicy: Retain
  storageClassName: local-storage
  volumeMode: Filesystem
---
apiVersion: v1
kind: PersistentVolume
metadata:
  name: valkey-data-valkey-master-3
spec:
  accessModes:
  - ReadWriteOnce
  capacity:
    storage: 10Gi
  local:
    path: /bitnami/valkey/recipes/data
  nodeAffinity:
    required:
      nodeSelectorTerms:
      - matchExpressions:
        - key: kubernetes.io/hostname
          operator: In
          values:
          - rke2-agent-3
  persistentVolumeReclaimPolicy: Retain
  storageClassName: local-storage
  volumeMode: Filesystem
  
---
apiVersion: v1
kind: PersistentVolume
metadata:
  name: valkey-data-valkey-replicas-1
spec:
  accessModes:
  - ReadWriteOnce
  capacity:
    storage: 10Gi
  local:
    path: /bitnami/valkey/recipes/slave-data
  nodeAffinity:
    required:
      nodeSelectorTerms:
      - matchExpressions:
        - key: kubernetes.io/hostname
          operator: In
          values:
          - rke2-agent-1
  persistentVolumeReclaimPolicy: Retain
  storageClassName: local-storage
  volumeMode: Filesystem
---
apiVersion: v1
kind: PersistentVolume
metadata:
  name: valkey-data-valkey-replicas-2
spec:
  accessModes:
  - ReadWriteOnce
  capacity:
    storage: 10Gi
  local:
    path: /bitnami/valkey/recipes/slave-data
  nodeAffinity:
    required:
      nodeSelectorTerms:
      - matchExpressions:
        - key: kubernetes.io/hostname
          operator: In
          values:
          - rke2-agent-2
  persistentVolumeReclaimPolicy: Retain
  storageClassName: local-storage
  volumeMode: Filesystem
---
apiVersion: v1
kind: PersistentVolume
metadata:
  name: valkey-data-valkey-replicas-3
spec:
  accessModes:
  - ReadWriteOnce
  capacity:
    storage: 10Gi
  local:
    path: /bitnami/valkey/recipes/slave-data
  nodeAffinity:
    required:
      nodeSelectorTerms:
      - matchExpressions:
        - key: kubernetes.io/hostname
          operator: In
          values:
          - rke2-agent-3
  persistentVolumeReclaimPolicy: Retain
  storageClassName: local-storage
  volumeMode: Filesystem