FOLIO Helm Charts v2

     

Introduction

This repository contains Helm charts for different modules of the FOLIO (The Future of Libraries is Open) project. The FOLIO project aims to reimagine library software through a unique collaboration of libraries, developers, and vendors. It looks beyond the current model of an Integrated Library System to a new paradigm, where apps are built on an open platform, providing libraries with the ability to innovate and deliver extended services.

In this repository, you will find HELM charts for each FOLIO module.

Structure

folio-helm-v2/
├── README.md
├── example/ # module chart scaffold
│ ├── value.yaml # library entry point
│ ├── templates/
│ │ ├── application.yaml # main module template model
│ │ └── NOTES.txt # chart user instruction model
│ └── resources # resource file examples
│ ├── ephemeral.properties
│ └── log4j2.xml
└── charts/
├── <some-module>/ # FOLIO module HELM chart
│ ├── Chart.yaml # chart information
│ ├── values.yaml # default values for templates
│ ├── templates/
│ │ ├── application.yaml # main template
│ │ └── NOTES.txt # chart user instruction
│ └── resources/ # chart resource files
│ ├── ephemeral.properties
│ ├── ..................
│ └── log4j2.xml
├── ..................
└── folio-common/ # core helpers
├── Chart.yaml
├── values.yaml
└── templates/
├── _configmap.tpl
├── _deployment.tpl
├── _helpers.tpl
├── ...............
└── _volume.tpl

Usage

Chart usage

The charts in this repository allow users to deploy different modules of the FOLIO project to a Kubernetes cluster using the Helm package manager. To deploy a module, follow these steps:

• Search for the particular FOLIO module you are interested in (For example, mod-users).
• Look at the values.yaml file to understand the default configurations available for this module. Usually, they have common Parameters but some distinctions are possible.
• Use Helm to install the chart with your unique release name and appropriate configurations.

Adding/Modifying Charts

For adding new charts or modifying existing ones, this repository is designed to make the process straightforward.

In the example directory, we have a scaffold that you can use as a base for creating new charts.

The key feature in this repository is the charts/folio-common directory. This directory contains core chart helpers you need to create Kubernetes deployments, services, ingresses, and so on. The folio-common helpers are included in the templates/application.yaml file.

When creating new charts, use the existing pattern and make sure to cater for any unique characteristics that the new module might have. But also it give a pattern that needs to be followed.

This approach ensures seamless deployments and maintenance of the FOLIO project modules.

Please DO NOT forget to increase the Chart version if changes were made.

After merging Pull Request to the master branch the job https://jenkins-aws.indexdata.com/job/folioRancher/job/folioDevOpsTools/job/indexFolioHelmCharts/ will run, package and index chart in Nexus automatically.

Prerequisites

• Kubernetes 1.22+
• Helm 3.10+

Getting started

To add the repository locally, execute the following command before installing the first chart. This command isn't necessary for subsequent chart installations.

helm repo add folio-helm-v2 https://repository.folio.org/repository/folio-helm-v2/

Install Chart

Should the repository have been added a while ago, run the following command to update the repository cache with the latest changes before installing any chart.

helm repo update folio-helm-v2

To install the chart invoke the following command.

helm install my-install-name folio-helm-v2/CHART_NAME

Note: Please make sure to replace CHART_NAME with the name of the chart that needs to be installed. The --version x.x.x attribute can be added at the end of the command to install a specific version of the chart. Otherwise, the latest version will be installed.

To get the exact name of a specific module chart, invoke the following command to see the full list of charts and their latest version in the folio repository:

helm search repo folio-helm-v2

The install command deploys a specific module 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

Uninstall Chart

To uninstall/delete the my-release-name deployment invoke the command below. This will remove all previously deployed Kubernetes components associated with the my-release-name deployment.

helm uninstall my-release-name

Parameters

Common parameters

Name	Description	Common value
imagePullSecrets	Array provisioning credentials for pulling private Docker images.	[]
nameOverride	Allows partial override names in template to prevent name conflicts/collisions across different environments or when multiple versions of the chart are installed in the same namespace.	""
fullnameOverride	Completely overrides names in template.	""
replicaCount	Number of module's deployment replicas.	1
startupProbe	Checks whether an application has started and identifies startup problems in applications with long initialization phases. Used with containers that don't start immediately.	{}
readinessProbe	Determines whether a container is ready to serve requests.	{}
livenessProbe	Determines whether a container is healthy and running as expected.	{}
podAnnotations	Pod annotations.	{}
podSecurityContext	Defines privilege and access control settings for pods. securityContext parameter directly applies to container and overrides this parameter.	{}
securityContext	Defines privilege and access control settings for containers.	{}
nodeSelector	Controls on which nodes a pod gets scheduled.	{}
tolerations	Applied to pods allowing (but not requiring) the pods to schedule onto nodes with matching taints.	[]
affinity	Controls how the scheduler assigns pods to nodes.	{}
args	Arguments passed to the command that is run in the container.	[]
javaOpts	Sets JAVA_OPTIONS environment variable for containers via env section.	"-XX:MaxRAMPercentage=75.0"
extraJavaOpts	Adds additional values for JAVA_OPTIONS environment variable to containers via env section.	[]
extraEnvVars	Adds additional env variables to containers via env section.	[]
extraEnvVarsSecrets	Adds additional env variables to containers from either a ConfigMap or Secret without having to specify each one individually via envFrom section.	[]
heapDumpEnabled	If set to true, an emptydir volume is added, along with the -XX:+HeapDumpOnOutOfMemoryError" "-XX:HeapDumpPath=/tmp/dump/" arguments to receive heap dumps at the point of failure to understand what consumes the JVM's memory. Consider this option if the application encounters frequent OutOfMemoryError errors.	false
resources	Adds resources section to the containers.	limits: memory: 384Mi requests: memory: 256Mi
autoscaling	Deploys HorizontalPodAutoscaler and disables replicaCount settings if autoscaling.enabled is true. Configure minReplicas, maxReplicas, etc. when enabling.	autoscaling: enabled: false
image.repository	Module's image repository (occasionally, it could be a URL).	folioorg/IMAGE_NAME
image.pullPolicy	Module's image pull policy (occasionally, it could be Always).	IfNotPresent
image.tag	Module's image tag defaults to the chart appVersion (occasionally, it could be "latest").	""
serviceAccount.create	If serviceAccount.create is true, an additional ServiceAccount is created.	true
serviceAccount.annotations	If serviceAccount.create is true, annotations are set inside the new ServiceAccount.	{}
serviceAccount.name	Defines the name of the new or existing ServiceAccount to be assigned to the pod, depending on the serviceAccount.create value.	""
jmx.enabled	If jmx.enabled is true, jmx.port is exposed to allow JMX service to connect to the pod (e.g., a monitoring service or a JVM management console) and track its performance, memory usage, loaded classes, and other Java-related metrics.	false
jmx.port	Port for for prometheus jmx exporter.	1099
jmx.agentPath	Location for prometheus jmx exporter agent and config.	1099
jmx.agentVersion	Version of Prometheus jmx exporter.	1099
eureka.enabled	If values is true, Eureka related resources are created. Is disabled by default.	false
eureka.extraEnvVars	Adds additional env variables to containers via env section if eureka.enabled is true.	[]

Service parameters

Name	Description	Common value
service.type	Service exposure strategy.	ClusterIP
service.ports.name	Optional part of the port specification used when a service has multiple exposed ports.	http
service.ports.protocol	Network protocol that the service uses for the port.	TCP
service.ports.port	Service port to be exposed.	80
service.ports.containerPort	Added to a Deployment specification to indicate the port that a container in the Pod listens on.	8081
service.ports.targetPort	Port name in the Pod and target port in the Service definition.	http
service.annotations	Service annotations.	{}

Ingress parameters

Name	Description	Common value
ingress.enabled	If ingress.enabled is true, a new Ingress is created.	false
ingress.className	Name of the IngressClass in ingressClassName property of Ingress.	""
ingress.annotations	Ingress annotations.	{}
ingress.tls	An array of secrets and TLS hosts, optionally specifying the hosts they apply to.	[]
ingress.hosts.host	Specifies the hostname to be matched so that the Ingress rules apply.	chart-example.local
ingress.hosts.paths.path	Determines the path used to route HTTP(S) traffic to a specific service.	/*
ingress.hosts.paths.pathType	Specifies how the path field should match incoming HTTP(S) requests.	ImplementationSpecific

ConfigMaps parameters

Name	Description	Common value
configMaps.NAME	Defines existing or new ConfigMaps section with NAME (replace with the existing or desired name). Resource file used as a source for the data section of new ConfigMaps.	ephemeral, apiconfig, log4j, sip2config, sip2tenants
configMaps.NAME.enabled	If configMaps.NAME.enabled is true, volume with desired ConfigMaps is mounted as a volume to a container.	true
configMaps.NAME.fileName	Name of a file used as a source for the data section of new ConfigMaps. Resides in the resource subfolder of the chart.	ephemeral.properties, api_configuration.json, log4j2.xml, sip2.conf, sip2-tenants.conf
configMaps.NAME.mountPath	Mount path used in volume definition section with mapping of newly created ConfigMaps.	/etc/edge, /etc/log4j2.xml
configMaps.NAME.existingConfig	Defines existing ConfigMaps name. If defined and configMaps.NAME.enabled is true, existing ConfigMaps are used and mapped to the volume.	""

Secret parameters

Name	Description	Common value
integrations.NAME	Defines either existing or new Secret with NAME (replace with the existing or desired name).	okapi, db, kafka, opensearch, systemuser, s3, eureka, eureka-edge
integrations.NAME.enabled	If integrations.NAME.enabled is true, desired Secret is mapped via the secretRef section.	true
integrations.NAME.host	Host name that forms part of connection data in Secret. Can be omitted in some cases, depending on the the service requirements.	okapi, postgresql, kafka, localhost
integrations.NAME.port	Port number forming part of connection data in Secret. Can be omitted in some cases depending on the the service requirements.	9130, 5432, 9092, 443
integrations.NAME.url	URL forming part of connection data in Secret. Can be omitted in some cases depending on the the service requirements.	/etc/edge, /etc/log4j2.xml
integrations.NAME.username	Username that forms part of connection data in Secret. Can be omitted in some cases depending on the the service requirements.	/etc/edge, /etc/log4j2.xml
integrations.NAME.password	Password that forms part of connection data in Secret. Can be omitted in some cases depending on the the service requirements.	/etc/edge, /etc/log4j2.xml
integrations.NAME.name	A Name as a user name surrogate, consider it as user name data in Secret. Current utilization for the systemuser integration.
integrations.NAME.hostReader	Host reader forming part of the data in Secret. Used for PostgreSQL integration.	""
integrations.NAME.database	Database name forming part of connection data in Secret. Used in DB integration cases.	folio
integrations.NAME.charset	The charset used for working with database data. Used in DB integration cases.	UTF-8
integrations.NAME.querytimeout	Refers to the amount of time that a single query or command can run before being automatically stopped or cancelled by the system. Used in DB integration cases.	60000
integrations.NAME.maxpoolsize	Used to manage and limit the number of database connections kept open for future requests. Used in DB integration cases.	5
integrations.NAME.isAws	Flag that defines whether it's an AWS S3 or a Minio surrogate of AWS S3. Used in the AWS S3 integration case.	true
integrations.NAME.sdk	An AWS SDK used in the AWS S3 integration case.	/etc/edge, /etc/log4j2.xml
integrations.NAME.region	An AWS region for connection purpose. Used in AWS S3 integration case.	""
integrations.NAME.bucket	Bucket to work with. Used in the AWS S3 integration case.	""
integrations.NAME.accessKeyId	An IAM user accessKeyId used for AWS CLI authorization. Used in AWS S3 integration case.	""
integrations.NAME.secretAccessKey	An IAM user secretAccessKey used for AWS CLI authorization. Used in AWS S3 integration case.	""
integrations.NAME.forcepathstyle	A configuration setting that determines how the bucket name appears in the URL of your S3 objects.	""
integrations.NAME.existingSecret	Defines an existing Secret name. If provided and integrations.NAME.enabled is true, the existing Secret will be utilised and mapped to the volume.	""

Init container

Name	Description	Common value
initContainer.enabled	If initContainer.NAME.enabled is true, a new init container will be added to the pod.	false
initContainer.image.repository	An init container image name.
initContainer.image.tag	An init container image tag.	latest
initContainer.image.pullPolicy	An init container image pull policy.	Always
initContainer.command	Init container command list.	[]
initContainer.args	Arguments passed to the command that is run in the init container.	[]
initContainer.extraVolumeMounts.NAME.enabled	If the extra volume mount element is enabled, a previously defined volume will be mounted to the pod's init container.	false
initContainer.extraVolumeMounts.NAME.name	A reference name to an existed extra volume.
initContainer.extraVolumeMounts.NAME.mountPath	Extra volume mount path.

Volume claim (PVC) list element

Name	Description	Common value
volumeClaims.NAME.enabled	If the volumeClaims element is enabled, a new PVC will be added to the namespace.	false
volumeClaims.NAME.name	A new volume claim name.
volumeClaims.NAME.storageClassName	Storage class type name of the volume.	gp2
volumeClaims.NAME.size	Size of the PV to be allocated.	10Gi
volumeClaims.NAME.accessModes	Access mode type for the provided PV.	ReadWriteOnce
volumeClaims.NAME.existingClaim	Defines an existing persistence volume claim. If provided and volumeClaims.NAME.enabled is true, the existing PVC will be utilized and mapped to the volume.

Extra volume list element

Name	Description	Common value
extraVolumes.NAME.enabled	If the extra volume element is enabled, a new volume will be added to the deployment pod.	false
extraVolumes.NAME.name	An extra volume name.
extraVolumes.NAME.emptyDir	Definition for the ephemeral local Kubernetes node volume (OPTIONAL).	{}
extraVolumes.NAME.persistentVolumeClaim.claimName	A reference name for the existing PVC (defined or not in the chart) (OPTIONAL).

Pod's container extra volume mount list element

Name	Description	Common value
extraVolumeMounts.NAME.enabled	If the extra volume mount element is enabled, a previously defined volume will be mounted to the pod's container.	false
extraVolumeMounts.NAME.name	A reference name to an existed extra volume.
extraVolumeMounts.NAME.mountPath	Extra volume mount path.

Sidecar containers

Name	Description	Common value
sidecarContainers.NAME	The section provides sidecar information.	eureka
sidecarContainers.NAME.enabled	If it is true an additional container will be added to the module pod.	false
sidecarContainers.NAME.name	A container name to be used as sidecar name. If it is not provided section name is utilized.	'sidecar'
sidecarContainers.NAME.image.repository	Sidecar container image location.
sidecarContainers.NAME.image.tag	Sidecar container image tag.	latest
sidecarContainers.NAME.image.pullPolicy	Sidecar container image pull policy.	IfNotPresent
sidecarContainers.NAME.ports.name	Optional part of the port specification used when a service has multiple exposed ports.	'sidecar'
sidecarContainers.NAME.ports.port	Sidecar container TCP port number in the pod to listen on.	8082
sidecarContainers.NAME.ports.containerPort	Sidecar container TCP port number to be exposed via the service.	8082
sidecarContainers.NAME.resources	Sidecar resource section.	limits: memory: 96Mi requests: memory: 64Mi
sidecarContainers.NAME.env	Adds env variables to sidecar container via this section.

---

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

helm install my-release-name \
    --set image.tag=latest \
    folio/CHART_NAME

Note: Please make sure to replace CHART_NAME with the name of the chart that needs to be installed.

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

helm install my-release-name -f values.yaml folio/CHART_NAME

License

Copyright (C) 2019-2023 The Open Library Foundation

This software is distributed under the terms of the Apache License, Version 2.0. See the file "LICENSE" for more information.