charts/bitnami/solr

Bitnami package for Apache Solr

Apache Solr is an extremely powerful, open source enterprise search platform built on Apache Lucene. It is highly reliable and flexible, scalable, and designed to add value very quickly after launch.

Overview of Apache Solr

Trademarks: This software listing is packaged by Bitnami. The respective trademarks mentioned in the offering are owned by the respective companies, and use of them does not imply any affiliation or endorsement.

TL;DR

helm install my-release oci://registry-1.docker.io/bitnamicharts/solr

Looking to use Apache Solr in production? Try VMware Tanzu Application Catalog, the commercial edition of the Bitnami catalog.

⚠️ Important Notice: Upcoming changes to the Bitnami Catalog

Beginning August 28th, 2025, Bitnami will evolve its public catalog to offer a curated set of hardened, security-focused images under the new Bitnami Secure Images initiative. As part of this transition:

• Granting community users access for the first time to security-optimized versions of popular container images.
• Bitnami will begin deprecating support for non-hardened, Debian-based software images in its free tier and will gradually remove non-latest tags from the public catalog. As a result, community users will have access to a reduced number of hardened images. These images are published only under the “latest” tag and are intended for development purposes
• Starting August 28th, over two weeks, all existing container images, including older or versioned tags (e.g., 2.50.0, 10.6), will be migrated from the public catalog (docker.io/bitnami) to the “Bitnami Legacy” repository (docker.io/bitnamilegacy), where they will no longer receive updates.
• For production workloads and long-term support, users are encouraged to adopt Bitnami Secure Images, which include hardened containers, smaller attack surfaces, CVE transparency (via VEX/KEV), SBOMs, and enterprise support.

These changes aim to improve the security posture of all Bitnami users by promoting best practices for software supply chain integrity and up-to-date deployments. For more details, visit the Bitnami Secure Images announcement.

Introduction

This chart bootstraps a Solr deployment on a Kubernetes cluster using the Helm package manager.

Prerequisites

• Kubernetes 1.23+
• Helm 3.8.0+
• PV provisioner support in the underlying infrastructure
• ReadWriteMany volumes for deployment scaling

Installing the Chart

To install the chart with the release name my-release:

helm install my-release oci://REGISTRY_NAME/REPOSITORY_NAME/solr

Note: You need to substitute the placeholders REGISTRY_NAME and REPOSITORY_NAME with a reference to your Helm chart registry and repository. For example, in the case of Bitnami, you need to use REGISTRY_NAME=registry-1.docker.io and REPOSITORY_NAME=bitnamicharts.

These commands deploy Solr on the Kubernetes cluster in the default configuration. The Parameters section lists the parameters that can be configured during installation.

Tip

: List all releases using helm list

Uninstalling the Chart

To uninstall/delete the my-release statefulset:

helm delete my-release

The command removes all the Kubernetes components associated with the chart and deletes the release. Use the option --purge to delete all history too.

Configuration and installation details

Resource requests and limits

Bitnami charts allow setting resource requests and limits for all containers inside the chart deployment. These are inside the resources value (check parameter table). Setting requests is essential for production workloads and these should be adapted to your specific use case.

To make this process easier, the chart contains the resourcesPreset values, which automatically sets the resources section according to different presets. Check these presets in the bitnami/common chart. However, in production workloads using resourcesPreset is discouraged as it may not fully adapt to your specific needs. Find more information on container resource management in the official Kubernetes documentation.

Update credentials

Bitnami charts configure credentials at first boot. Any further change in the secrets or credentials require manual intervention. Follow these instructions:

• Update the user password following the upstream documentation
• Update the password secret with the new values (replace the SECRET_NAME and PASSWORD placeholders)

kubectl create secret generic SECRET_NAME --from-literal=solr-password=PASSWORD --dry-run -o yaml | kubectl apply -f -

Prometheus metrics

This chart can be integrated with Prometheus by setting metrics.enabled to true. This will deploy a Deployment with solr-exporter and a metrics service, which can be configured under the metrics.service section. This metrics service will have the necessary annotations to be automatically scraped by Prometheus.

Prometheus requirements

It is necessary to have a working installation of Prometheus or Prometheus Operator for the integration to work. Install the Bitnami Prometheus helm chart or the Bitnami Kube Prometheus helm chart to easily have a working Prometheus in your cluster.

Integration with Prometheus Operator

The chart can deploy ServiceMonitor objects for integration with Prometheus Operator installations. To do so, set the value metrics.serviceMonitor.enabled=true. Ensure that the Prometheus Operator CustomResourceDefinitions are installed in the cluster or it will fail with the following error:

no matches for kind "ServiceMonitor" in version "monitoring.coreos.com/v1"

Install the Bitnami Kube Prometheus helm chart for having the necessary CRDs and the Prometheus Operator.

Rolling vs Immutable tags

It is strongly recommended to use immutable tags in a production environment. This ensures your deployment does not change automatically if the same tag is updated with a different image.

Bitnami will release a new chart updating its containers if a new version of the main container, significant changes, or critical vulnerabilities exist.

Use a different Apache Solr version

To modify the application version used in this chart, specify a different version of the image using the image.tag parameter and/or a different repository using the image.repository parameter.

Add extra environment variables

In case you want to add extra environment variables (useful for advanced operations like custom init scripts), you can use the extraEnvVars property.

extraEnvVars:
  - name: ZOOKEEPER_VERSION
    value: 6

Alternatively, you can use a ConfigMap or a Secret with the environment variables. To do so, use the extraEnvVarsCM or the extraEnvVarsSecret values.

Use Sidecars and Init Containers

If additional containers are needed in the same pod (such as additional metrics or logging exporters), they can be defined using the sidecars config parameter.

sidecars:
- name: your-image-name
  image: your-image
  imagePullPolicy: Always
  ports:
  - name: portname
    containerPort: 1234

If these sidecars export extra ports, extra port definitions can be added using the service.extraPorts parameter (where available), as shown in the example below:

service:
  extraPorts:
  - name: extraPort
    port: 11311
    targetPort: 11311

NOTE: This Helm chart already includes sidecar containers for the Prometheus exporters (where applicable). These can be activated by adding the --enable-metrics=true parameter at deployment time. The sidecars parameter should therefore only be used for any extra sidecar containers.

If additional init containers are needed in the same pod, they can be defined using the initContainers parameter. Here is an example:

initContainers:
  - name: your-image-name
    image: your-image
    imagePullPolicy: Always
    ports:
      - name: portname
        containerPort: 1234

Learn more about sidecar containers and init containers.

Set Pod affinity

This chart allows you to set your custom affinity using the XXX.affinity parameter(s). Find more information about Pod affinity in the Kubernetes documentation.

As an alternative, you can use the preset configurations for pod affinity, pod anti-affinity, and node affinity available at the bitnami/common chart. To do so, set the XXX.podAffinityPreset, XXX.podAntiAffinityPreset, or XXX.nodeAffinityPreset parameters.

Securing traffic using TLS

Solr can encrypt communications by setting tls.enabled=true. The chart allows two configuration options:

• Provide your own secret using the tls.certificatesSecretNawe value. Also set the correct name of the keystore and truststore passwords (if required) using the tls.keystorePassword, tls.truststorePassword values.
• Have the chart auto-generate the certificates using tls.autoGenerated=true.

Backup and restore

To back up and restore Helm chart deployments on Kubernetes, you need to back up the persistent volumes from the source deployment and attach them to a new deployment using Velero, a Kubernetes backup/restore tool. Find the instructions for using Velero in this guide.

Persistence

The Bitnami Solr image can persist data. If enabled, the persisted path is /bitnami/solr by default.

The chart mounts a Persistent Volume at this location. The volume is created using dynamic volume provisioning.

Add extra volumes

The Bitnami Solr chart supports mounting extra volumes (either PVCs, secrets or configmaps) by using the extraVolumes and extraVolumeMounts property. This can be combined with advanced operations like adding extra init containers and sidecars.

Adjust permissions of persistent volume mountpoint

As the image run as non-root by default, it is necessary to adjust the ownership of the persistent volume so that the container can write data into it.

By default, the chart is configured to use Kubernetes Security Context to automatically change the ownership of the volume. However, this feature does not work in all Kubernetes distributions. As an alternative, this chart supports using an initContainer to change the ownership of the volume before mounting it in the final destination.

You can enable this initContainer by setting volumePermissions.enabled to true.

Parameters

Global parameters

Name	Description	Value
global.imageRegistry	Global Docker image registry	""
global.imagePullSecrets	Global Docker registry secret names as an array	[]
global.defaultStorageClass	Global default StorageClass for Persistent Volume(s)	""
global.storageClass	DEPRECATED: use global.defaultStorageClass instead	""
global.security.allowInsecureImages	Allows skipping image verification	false
global.compatibility.openshift.adaptSecurityContext	Adapt the securityContext sections of the deployment to make them compatible with Openshift restricted-v2 SCC: remove runAsUser, runAsGroup and fsGroup and let the platform use their allowed default IDs. Possible values: auto (apply if the detected running cluster is Openshift), force (perform the adaptation always), disabled (do not perform adaptation)	auto

Common parameters

Name	Description	Value
kubeVersion	Override Kubernetes version	""
nameOverride	String to partially override common.names.fullname template (will maintain the release name)	""
fullnameOverride	String to fully override common.names.fullname template	""
clusterDomain	Kubernetes cluster domain	cluster.local
commonLabels	Add labels to all the deployed resources	{}
commonAnnotations	Add annotations to all the deployed resources	{}
extraDeploy	Extra objects to deploy (value evaluated as a template)	[]
usePasswordFiles	Mount credentials as files instead of using environment variables	true
diagnosticMode.enabled	Enable diagnostic mode (all probes will be disabled and the command will be overridden)	false
diagnosticMode.command	Command to override all containers in the statefulset	["sleep"]
diagnosticMode.args	Args to override all containers in the statefulset	["infinity"]

Solr parameters

Name	Description	Value
image.registry	Solr image registry	REGISTRY_NAME
image.repository	Solr image repository	REPOSITORY_NAME/solr
image.digest	Solr image digest in the way sha256:aa.... Please note this parameter, if set, will override the tag	""
image.pullPolicy	image pull policy	IfNotPresent
image.pullSecrets	Specify docker-registry secret names as an array	[]
image.debug	Specify if debug values should be set	false
auth.enabled	Enable Solr authentication	true
auth.adminUsername	Solr admin username	admin
auth.adminPassword	Solr admin password. Autogenerated if not provided.	""
auth.existingSecret	Existing secret with Solr password	""
auth.existingSecretPasswordKey	Password key to be retrieved from existing secret	solr-password
coreNames	Solr core names to be created	["my-core"]
cloudEnabled	Enable Solr cloud mode	true
cloudBootstrap	Enable cloud bootstrap. It will be performed from the node 0.	true
collection	Solr collection name	my-collection
collectionShards	Number of collection shards	1
collectionReplicas	Number of collection replicas	2
serverDirectory	Name of the created directory for the server	server
javaMem	Java memory options to pass to the Solr container	""
heap	Java Heap options to pass to the Solr container	""
command	Override Solr entrypoint string	["/scripts/setup.sh"]
args	Arguments for the provided command if needed	[]
extraEnvVars	Additional environment variables to set	[]
extraEnvVarsCM	ConfigMap with extra environment variables	""
extraEnvVarsSecret	Secret with extra environment variables	""

Solr statefulset parameters

Name	Description	Value
replicaCount	Number of solr replicas	3
revisionHistoryLimit	The number of old history to retain to allow rollback	10
containerPorts.http	Solr HTTP container port	8983
livenessProbe.enabled	Enable livenessProbe on Solr containers	true
livenessProbe.initialDelaySeconds	Initial delay seconds for livenessProbe	40
livenessProbe.periodSeconds	Period seconds for livenessProbe	10
livenessProbe.timeoutSeconds	Timeout seconds for livenessProbe	15
livenessProbe.failureThreshold	Failure threshold for livenessProbe	6
livenessProbe.successThreshold	Success threshold for livenessProbe	1
readinessProbe.enabled	Enable readinessProbe on Solr containers	true
readinessProbe.initialDelaySeconds	Initial delay seconds for readinessProbe	60
readinessProbe.periodSeconds	Period seconds for readinessProbe	10
readinessProbe.timeoutSeconds	Timeout seconds for readinessProbe	15
readinessProbe.failureThreshold	Failure threshold for readinessProbe	6
readinessProbe.successThreshold	Success threshold for readinessProbe	1
startupProbe.enabled	Enable startupProbe on Solr containers	false
startupProbe.initialDelaySeconds	Initial delay seconds for startupProbe	40
startupProbe.periodSeconds	Period seconds for startupProbe	10
startupProbe.timeoutSeconds	Timeout seconds for startupProbe	15
startupProbe.failureThreshold	Failure threshold for startupProbe	15
startupProbe.successThreshold	Success threshold for startupProbe	1
customLivenessProbe	Custom livenessProbe that overrides the default one	{}
customReadinessProbe	Custom readinessProbe that overrides the default one	{}
customStartupProbe	Custom startupProbe that overrides the default one	{}
lifecycleHooks	lifecycleHooks for the Solr container to automate configuration before or after startup	{}
resourcesPreset	Set container resources according to one common preset (allowed values: none, nano, micro, small, medium, large, xlarge, 2xlarge). This is ignored if resources is set (resources is recommended for production).	medium
resources	Set container requests and limits for different resources like CPU or memory (essential for production workloads)	{}
podSecurityContext.enabled	Enable Solr pods' Security Context	true
podSecurityContext.fsGroupChangePolicy	Set filesystem group change policy	Always
podSecurityContext.sysctls	Set kernel settings using the sysctl interface	[]
podSecurityContext.supplementalGroups	Set filesystem extra groups	[]
podSecurityContext.fsGroup	Set Solr pod's Security Context fsGroup	1001
containerSecurityContext.enabled	Enabled containers' Security Context	true
containerSecurityContext.seLinuxOptions	Set SELinux options in container	{}
containerSecurityContext.runAsUser	Set containers' Security Context runAsUser	1001
containerSecurityContext.runAsGroup	Set containers' Security Context runAsGroup	1001
containerSecurityContext.runAsNonRoot	Set container's Security Context runAsNonRoot	true
containerSecurityContext.privileged	Set container's Security Context privileged	false
containerSecurityContext.readOnlyRootFilesystem	Set container's Security Context readOnlyRootFilesystem	true
containerSecurityContext.allowPrivilegeEscalation	Set container's Security Context allowPrivilegeEscalation	false
containerSecurityContext.capabilities.drop	List of capabilities to be dropped	["ALL"]
containerSecurityContext.seccompProfile.type	Set container's Security Context seccomp profile	RuntimeDefault
automountServiceAccountToken	Mount Service Account token in pod	false
hostAliases	Solr pods host aliases	[]
podLabels	Extra labels for Solr pods	{}
podAnnotations	Annotations for Solr pods	{}
podAffinityPreset	Solr pod affinity preset. Ignored if affinity is set. Allowed values: soft or hard	""
podAntiAffinityPreset	Solr pod anti-affinity preset. Ignored if affinity is set. Allowed values: soft or hard	soft
nodeAffinityPreset.type	Solr node affinity preset type. Ignored if affinity is set. Allowed values: soft or hard	""
nodeAffinityPreset.key	Solr node label key to match Ignored if affinity is set.	""
nodeAffinityPreset.values	Solr node label values to match. Ignored if affinity is set.	[]
affinity	Affinity settings for Solr pod assignment. Evaluated as a template	{}
nodeSelector	Node labels for Solr pods assignment. Evaluated as a template	{}
tolerations	Tolerations for Solr pods assignment. Evaluated as a template	[]
topologySpreadConstraints	Topology Spread Constraints for pod assignment spread across your cluster among failure-domains. Evaluated as a template	[]
podManagementPolicy	Management Policy for Solr StatefulSet	Parallel
priorityClassName	Solr pods' priority.	""
schedulerName	Kubernetes pod scheduler registry	""
updateStrategy.type	Solr statefulset strategy type	RollingUpdate
updateStrategy.rollingUpdate	Solr statefulset rolling update configuration parameters	{}
enableServiceLinks	Whether information about services should be injected into pod's environment variable	true
pdb.create	Enable a Pod Disruption Budget creation	true
pdb.minAvailable	Minimum number/percentage of pods that should remain scheduled	""
pdb.maxUnavailable	Maximum number/percentage of pods that may be made unavailable	""
extraVolumes	Optionally specify extra list of additional volumes for the Solr pod(s)	[]
extraVolumeMounts	Optionally specify extra list of additional volumeMounts for the Solr container(s)	[]
initContainers	Add init containers to the Solr pod(s)	[]
sidecars	Add sidecars to the Solr pod(s)	[]

Traffic Exposure parameters

Name	Description	Value
service.type	Kubernetes Service type	ClusterIP
service.ports.http	Solr HTTP service port	8983
service.nodePorts.http	Node port for the HTTP service	""
service.sessionAffinity	Control where client requests go, to the same pod or round-robin	None
service.sessionAffinityConfig	Additional settings for the sessionAffinity	{}
service.clusterIP	Solr service Cluster IP	""
service.loadBalancerIP	Solr service Load Balancer IP	""
service.loadBalancerSourceRanges	Solr service Load Balancer sources	[]
service.externalTrafficPolicy	Solr service external traffic policy	Cluster
service.annotations	Additional custom annotations for Solr service	{}
service.extraPorts	Extra ports to expose in the Solr service (normally used with the sidecar value)	[]
service.headless.annotations	Annotations for the headless service.	{}
networkPolicy.enabled	Specifies whether a NetworkPolicy should be created	true
networkPolicy.allowExternal	Don't require client label for connections	true
networkPolicy.allowExternalEgress	Allow the pod to access any range of port and all destinations.	true
networkPolicy.extraIngress	Add extra ingress rules to the NetworkPolicy	[]
networkPolicy.extraEgress	Add extra ingress rules to the NetworkPolicy	[]
networkPolicy.ingressNSMatchLabels	Labels to match to allow traffic from other namespaces	{}
networkPolicy.ingressNSPodMatchLabels	Pod labels to match to allow traffic from other namespaces	{}
ingress.enabled	Enable ingress record generation for Solr	false
ingress.ingressClassName	IngressClass that will be be used to implement the Ingress (Kubernetes 1.18+)	""
ingress.pathType	Ingress path type	ImplementationSpecific
ingress.apiVersion	Force Ingress API version (automatically detected if not set)	""
ingress.hostname	Default host for the ingress record	solr.local
ingress.path	Default path for the ingress record	/
ingress.annotations	Additional annotations for the Ingress resource. To enable certificate autogeneration, place here your cert-manager annotations.	{}
ingress.tls	Enable TLS configuration for the host defined at ingress.hostname parameter	false
ingress.selfSigned	Create a TLS secret for this ingress record using self-signed certificates generated by Helm	false
ingress.extraHosts	An array with additional hostname(s) to be covered with the ingress record	[]
ingress.extraPaths	Any additional arbitrary paths that may need to be added to the ingress under the main host.	[]
ingress.extraTls	The tls configuration for additional hostnames to be covered with this ingress record.	[]
ingress.secrets	If you're providing your own certificates, please use this to add the certificates as secrets	[]
ingress.extraRules	Additional rules to be covered with this ingress record	[]

Persistence parameters

Name	Description	Value
persistence.enabled	Use a PVC to persist data.	true
persistence.existingClaim	A manually managed Persistent Volume and Claim	""
persistence.storageClass	Storage class of backing PVC	""
persistence.accessModes	Persistent Volume Access Modes	["ReadWriteOnce"]
persistence.size	Size of data volume	8Gi
persistence.annotations	Persistence annotations for Solr	{}
persistence.mountPath	Persistence mount path for Solr	/bitnami/solr
persistence.subPath	Path within the volume from which the container's	""
persistence.subPathExpr	Expanded path within the volume from which	""
persistence.selector	Selector to match an existing Persistent Volume for Solr data PVC	{}

Persistent Volume Claim Retention Policy

Name	Description	Value
persistentVolumeClaimRetentionPolicy.enabled	Enable Persistent volume retention policy for Solr Statefulset	false
persistentVolumeClaimRetentionPolicy.whenScaled	Volume retention behavior when the replica count of the StatefulSet is reduced	Retain
persistentVolumeClaimRetentionPolicy.whenDeleted	Volume retention behavior that applies when the StatefulSet is deleted	Retain

Volume Permissions parameters

Name	Description	Value
volumePermissions.enabled	Enable init container that changes the owner and group of the persistent volume	false
volumePermissions.image.registry	Init container volume-permissions image registry	REGISTRY_NAME
volumePermissions.image.repository	Init container volume-permissions image repository	REPOSITORY_NAME/os-shell
volumePermissions.image.digest	Init container volume-permissions image digest in the way sha256:aa.... Please note this parameter, if set, will override the tag	""
volumePermissions.image.pullPolicy	Init container volume-permissions image pull policy	IfNotPresent
volumePermissions.image.pullSecrets	Init container volume-permissions image pull secrets	[]
volumePermissions.resourcesPreset	Set container resources according to one common preset (allowed values: none, nano, micro, small, medium, large, xlarge, 2xlarge). This is ignored if volumePermissions.resources is set (volumePermissions.resources is recommended for production).	nano
volumePermissions.resources	Set container requests and limits for different resources like CPU or memory (essential for production workloads)	{}
volumePermissions.containerSecurityContext.seLinuxOptions	Set SELinux options in container	{}
volumePermissions.containerSecurityContext.runAsUser	User ID for the init container	0

Other Parameters

Name	Description	Value
serviceAccount.create	Enable creation of ServiceAccount for Solr pod	true
serviceAccount.name	The name of the ServiceAccount to use.	""
serviceAccount.automountServiceAccountToken	Allows auto mount of ServiceAccountToken on the serviceAccount created	false
serviceAccount.annotations	Additional custom annotations for the ServiceAccount	{}

Solr TLS parameters

Name	Description	Value
tls.enabled	Enable the TLS/SSL configuration	false
tls.autoGenerated	Create self-signed TLS certificates. Currently only supports PEM certificates	false
tls.certificatesSecretName	Name of the secret that contains the certificates	""
tls.passwordsSecretName	Set the name of the secret that contains the passwords for the certificate files	""
tls.keystorePassword	Password to access the keystore when it's password-protected	""
tls.truststorePassword	Password to access the truststore when it's password-protected	""
tls.resourcesPreset	Set container resources according to one common preset (allowed values: none, nano, micro, small, medium, large, xlarge, 2xlarge). This is ignored if tls.resources is set (tls.resources is recommended for production).	nano
tls.resources	Set container requests and limits for different resources like CPU or memory (essential for production workloads)	{}

Metrics parameters

Name	Description	Value
metrics.enabled	Deploy a Solr Prometheus exporter deployment to expose metrics	false
metrics.revisionHistoryLimit	The number of old history to retain to allow rollback	10
metrics.configFile	Config file with metrics to export by the Solr prometheus metrics. To change it mount a different file using extraConfigMaps	/opt/bitnami/solr/prometheus-exporter/conf/solr-exporter-config.xml
metrics.threads	Number of Solr exporter threads	7
metrics.command	Override Solr entrypoint string.	[]
metrics.args	Arguments for the provided command if needed	[]
metrics.extraEnvVars	Additional environment variables to set	[]
metrics.extraEnvVarsCM	ConfigMap with extra environment variables	""
metrics.extraEnvVarsSecret	Secret with extra environment variables	""
metrics.containerPorts.http	Solr Prometheus exporter HTTP container port	9231
metrics.livenessProbe.enabled	Enable livenessProbe on Solr Prometheus exporter containers	true
metrics.livenessProbe.initialDelaySeconds	Initial delay seconds for livenessProbe	10
metrics.livenessProbe.periodSeconds	Period seconds for livenessProbe	5
metrics.livenessProbe.timeoutSeconds	Timeout seconds for livenessProbe	15
metrics.livenessProbe.failureThreshold	Failure threshold for livenessProbe	15
metrics.livenessProbe.successThreshold	Success threshold for livenessProbe	1
metrics.readinessProbe.enabled	Enable readinessProbe on Solr Prometheus exporter containers	true
metrics.readinessProbe.initialDelaySeconds	Initial delay seconds for readinessProbe	10
metrics.readinessProbe.periodSeconds	Period seconds for readinessProbe	5
metrics.readinessProbe.timeoutSeconds	Timeout seconds for readinessProbe	15
metrics.readinessProbe.failureThreshold	Failure threshold for readinessProbe	15
metrics.readinessProbe.successThreshold	Success threshold for readinessProbe	15
metrics.startupProbe.enabled	Enable startupProbe on Solr Prometheus exporter containers	false
metrics.startupProbe.initialDelaySeconds	Initial delay seconds for startupProbe	30
metrics.startupProbe.periodSeconds	Period seconds for startupProbe	10
metrics.startupProbe.timeoutSeconds	Timeout seconds for startupProbe	1
metrics.startupProbe.failureThreshold	Failure threshold for startupProbe	15
metrics.startupProbe.successThreshold	Success threshold for startupProbe	1
metrics.customLivenessProbe	Custom livenessProbe that overrides the default one	{}
metrics.customReadinessProbe	Custom readinessProbe that overrides the default one	{}
metrics.customStartupProbe	Custom startupProbe that overrides the default one	{}
metrics.resourcesPreset	Set container resources according to one common preset (allowed values: none, nano, micro, small, medium, large, xlarge, 2xlarge). This is ignored if metrics.resources is set (metrics.resources is recommended for production).	nano
metrics.resources	Set container requests and limits for different resources like CPU or memory (essential for production workloads)	{}
metrics.containerSecurityContext.enabled	Enabled containers' Security Context	true
metrics.containerSecurityContext.seLinuxOptions	Set SELinux options in container	{}
metrics.containerSecurityContext.runAsUser	Set containers' Security Context runAsUser	1001
metrics.containerSecurityContext.runAsGroup	Set containers' Security Context runAsGroup	1001
metrics.containerSecurityContext.runAsNonRoot	Set container's Security Context runAsNonRoot	true
metrics.containerSecurityContext.privileged	Set container's Security Context privileged	false
metrics.containerSecurityContext.readOnlyRootFilesystem	Set container's Security Context readOnlyRootFilesystem	true
metrics.containerSecurityContext.allowPrivilegeEscalation	Set container's Security Context allowPrivilegeEscalation	false
metrics.containerSecurityContext.capabilities.drop	List of capabilities to be dropped	["ALL"]
metrics.containerSecurityContext.seccompProfile.type	Set container's Security Context seccomp profile	RuntimeDefault
metrics.podSecurityContext.enabled	Enable Solr Prometheus exporter pods' Security Context	true
metrics.podSecurityContext.fsGroupChangePolicy	Set filesystem group change policy	Always
metrics.podSecurityContext.sysctls	Set kernel settings using the sysctl interface	[]
metrics.podSecurityContext.supplementalGroups	Set filesystem extra groups	[]
metrics.podSecurityContext.fsGroup	Group ID for the pods.	1001
metrics.podLabels	Additional labels for Solr Prometheus exporter pod(s)	{}
metrics.podAnnotations	Additional annotations for Solr Prometheus exporter pod(s)	{}
metrics.podAffinityPreset	Solr Prometheus exporter pod affinity preset. Ignored if affinity is set. Allowed values: soft or hard	""
metrics.podAntiAffinityPreset	Solr Prometheus exporter pod anti-affinity preset. Ignored if affinity is set. Allowed values: soft or hard	soft
metrics.nodeAffinityPreset.type	Solr Prometheus exporter node affinity preset type. Ignored if affinity is set. Allowed values: soft or hard	""
metrics.nodeAffinityPreset.key	Solr Prometheus exporter node label key to match Ignored if affinity is set.	""
metrics.nodeAffinityPreset.values	Solr Prometheus exporter node label values to match. Ignored if affinity is set.	[]
metrics.affinity	Affinity settings for Solr Prometheus exporter pod assignment. Evaluated as a template	{}
metrics.nodeSelector	Node labels for Solr Prometheus exporter pods assignment. Evaluated as a template	{}
metrics.tolerations	Tolerations for Solr Prometheus exporter pods assignment. Evaluated as a template	[]
metrics.topologySpreadConstraints	Topology Spread Constraints for pod assignment spread across your cluster among failure-domains. Evaluated as a template	[]
metrics.priorityClassName	Solr Prometheus exporter pods' priority.	""
metrics.schedulerName	Kubernetes pod scheduler registry	""
metrics.automountServiceAccountToken	Mount Service Account token in pod	false
metrics.hostAliases	Solr Prometheus exporter pod host aliases	[]
metrics.updateStrategy.type	Solr Prometheus exporter deployment strategy type	RollingUpdate
metrics.updateStrategy.rollingUpdate	Solr Prometheus exporter deployment rolling update configuration parameters	{}
metrics.extraVolumes	Optionally specify extra list of additional volumes for the Solr Prometheus exporter pod(s)	[]
metrics.extraVolumeMounts	Optionally specify extra list of additional volumeMounts for the Solr Prometheus exporter container(s)	[]
metrics.initContainers	Add init containers to the Solr Prometheus exporter pod(s)	[]
metrics.sidecars	Add sidecars to the Solr Prometheus exporter pod(s)	[]
metrics.service.type	Kubernetes Service type	ClusterIP
metrics.service.ports.http	Solr Prometheus exporter HTTP service port	9231
metrics.service.sessionAffinity	Control where client requests go, to the same pod or round-robin	None
metrics.service.clusterIP	Solr Prometheus exporter service Cluster IP	""
metrics.service.annotations	annotations for Solr Prometheus exporter service	{}
metrics.service.labels	Additional labels for Solr Prometheus exporter service	{}
metrics.serviceMonitor.enabled	Create ServiceMonitor Resource for scraping metrics using Prometheus Operator	false
metrics.serviceMonitor.namespace	Namespace for the ServiceMonitor Resource (defaults to the Release Namespace)	""
metrics.serviceMonitor.interval	Interval at which metrics should be scraped.	""
metrics.serviceMonitor.scrapeTimeout	Timeout after which the scrape is ended	""
metrics.serviceMonitor.additionalLabels	Additional labels that can be used so ServiceMonitor will be discovered by Prometheus	{}
metrics.serviceMonitor.selector	Prometheus instance selector labels	{}
metrics.serviceMonitor.relabelings	RelabelConfigs to apply to samples before scraping	[]
metrics.serviceMonitor.metricRelabelings	MetricRelabelConfigs to apply to samples before ingestion	[]
metrics.serviceMonitor.honorLabels	Specify honorLabels parameter to add the scrape endpoint	false
metrics.serviceMonitor.jobLabel	The name of the label on the target service to use as the job name in prometheus.	""
metrics.prometheusRule.enabled	Create a custom prometheusRule Resource for scraping metrics using PrometheusOperator	false
metrics.prometheusRule.namespace	The namespace in which the prometheusRule will be created	""
metrics.prometheusRule.additionalLabels	Additional labels for the prometheusRule	{}
metrics.prometheusRule.rules	Custom Prometheus rules	[]

ZooKeeper parameters

Name	Description	Value
zookeeper.enabled	Enable ZooKeeper deployment. Needed for Solr cloud	true
zookeeper.fourlwCommandsWhitelist	A list of comma separated Four Letter Words commands that can be executed	srvr,mntr,conf,ruok
zookeeper.containerPorts.client	ZooKeeper client container port	2181
zookeeper.replicaCount	Number of ZooKeeper nodes	3
zookeeper.persistence.enabled	Enable persistence on ZooKeeper using PVC(s)	true
zookeeper.persistence.storageClass	Persistent Volume storage class	""
zookeeper.persistence.accessModes	Persistent Volume access modes	["ReadWriteOnce"]
zookeeper.persistence.size	Persistent Volume size	8Gi
externalZookeeper.servers	List of external zookeeper servers to use	[]

Specify each parameter using the --set key=value[,key=value] argument to helm install. For example,

helm install my-release \
  --set cloudEnabled=true oci://REGISTRY_NAME/REPOSITORY_NAME/solr

Note: You need to substitute the placeholders REGISTRY_NAME and REPOSITORY_NAME with a reference to your Helm chart registry and repository. For example, in the case of Bitnami, you need to use REGISTRY_NAME=registry-1.docker.io and REPOSITORY_NAME=bitnamicharts.

The above command enabled the Solr Cloud mode.

Alternatively, a YAML file that specifies the values for the parameters can be provided while installing the chart. For example,

helm install my-release -f values.yaml oci://REGISTRY_NAME/REPOSITORY_NAME/solr

Note: You need to substitute the placeholders REGISTRY_NAME and REPOSITORY_NAME with a reference to your Helm chart registry and repository. For example, in the case of Bitnami, you need to use REGISTRY_NAME=registry-1.docker.io and REPOSITORY_NAME=bitnamicharts. Tip: You can use the default values.yaml

Troubleshooting

Find more information about how to deal with common errors related to Bitnami's Helm charts in this troubleshooting guide.

Upgrading

To 9.5.0

This version introduces image verification for security purposes. To disable it, set global.security.allowInsecureImages to true. More details at GitHub issue.

To 9.0.3

This version uses solr container image version 9.5.0-debian-12-r7 which removes HDFS module due to CVEs found in it.

To 9.0.0

This major bump changes the following security defaults:

• runAsGroup is changed from 0 to 1001
• readOnlyRootFilesystem is set to true
• resourcesPreset is changed from none to the minimum size working in our test suites (NOTE: resourcesPreset is not meant for production usage, but resources adapted to your use case).
• global.compatibility.openshift.adaptSecurityContext is changed from disabled to auto.

This could potentially break any customization or init scripts used in your deployment. If this is the case, change the default values to the previous ones.

To 8.0.0

This major updates the Zookeeper subchart to it newest major, 12.0.0. For more information on this subchart's major, please refer to zookeeper upgrade notes.

To 7.0.0

This major updates the Zookeeper subchart to it newest major, 11.0.0. For more information on this subchart's major, please refer to zookeeper upgrade notes.

To 6.0.0

This major updates the Zookeeper subchart to it newest major, 10.0.0. For more information on this subchart's major, please refer to zookeeper upgrade notes.

To 4.0.0

This major updates the Zookeeper subchart to it newest major, 9.0.0. For more information on this subchart's major, please refer to zookeeper upgrade notes.

To 3.0.0

This major release renames several values in this chart and adds missing features, in order to be inline with the rest of assets in the Bitnami charts repository.

Affected values:

• containerPort has been regrouped under the containerPorts map.
• service.port has been regrouped under the service.ports map.
• authentication.* parameters are renamed to auth.*.

Additionally updates the ZooKeeper subchart to it newest major, 8.0.0, which contains similar changes.

To 2.0.0

In this version, the image block is defined once and is used in the different templates, while in the previous version, the image block was duplicated for the main container and the metrics one

image:
  registry: docker.io
  repository: bitnami/solr
  tag: 8.9.0

VS

image:
  registry: docker.io
  repository: bitnami/solr
  tag: 8.9.0
...
metrics:
  image:
    registry: docker.io
    repository: bitnami/solr
    tag: 8.9.0

See PR#7114 for more info about the implemented changes

To 1.0.0

This major updates the Zookeeper subchart to it newest major, 7.0.0, which renames all TLS-related settings. For more information on this subchart's major, please refer to zookeeper upgrade notes.

License

Copyright © 2025 Broadcom. The term "Broadcom" refers to Broadcom Inc. and/or its subsidiaries.

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.