charts/bitnami/metallb

MetalLB

MetalLB is an open source, rock solid LoadBalancer. It handles the ServiceType: Loadbalancer.

TL;DR

$ helm repo add bitnami https://charts.bitnami.com/bitnami
$ helm install my-release bitnami/metallb

Introduction

Bitnami charts for Helm are carefully engineered, actively maintained and are the quickest and easiest way to deploy containers on a Kubernetes cluster that are ready to handle production workloads.

This chart bootstraps a MetalLB Controller Controller Deployment and a MetalLB Speaker Daemonset on a Kubernetes cluster using the Helm package manager.

Bitnami charts can be used with Kubeapps for deployment and management of Helm Charts in clusters. This Helm chart has been tested on top of Bitnami Kubernetes Production Runtime (BKPR). Deploy BKPR to get automated TLS certificates, logging and monitoring for your applications.

Prerequisites

• Kubernetes 1.12+
• Helm 3.1.0
• Virtual IPs for Layer 2 or Route Reflector for BGP setup.

Installing the Chart

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

$ helm repo add bitnami https://charts.bitnami.com/bitnami
$ helm install my-release bitnami/metallb

These commands deploy metallb 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 helm release:

$ helm uninstall my-release

The command removes all the Kubernetes components associated with the chart and deletes the release.

Parameters

Global parameters

Name	Description	Value
global.imageRegistry	Global Docker image registry	""
global.imagePullSecrets	Global Docker registry secret names as an array	[]

Common parameters

Name	Description	Value
nameOverride	String to partially override metallb.fullname include (will maintain the release name)	""
fullnameOverride	String to fully override metallb.fullname template	""
commonLabels	Add labels to all the deployed resources	{}
commonAnnotations	Add annotations to all the deployed resources	{}

MetalLB parameters

Name	Description	Value
existingConfigMap	Specify the name of an externally-defined ConfigMap to use as the configuration. This is mutually exclusive with the configInline option.	""
configInline	Specifies MetalLB's configuration directly, in yaml format.	{}
rbac.create	Specifies whether to install and use RBAC rules	true
psp.create	create specifies whether to install Pod Security Policies.	false
networkPolicy.enabled	Enable NetworkPolicy	false
networkPolicy.ingressNSMatchLabels	Allow connections from other namespaces	{}
networkPolicy.ingressNSPodMatchLabels	For other namespaces match by pod labels and namespace labels	{}
prometheusRule.enabled	Prometheus Operator alertmanager alerts are created	false

Controller parameters

Name	Description	Value
controller.image.registry	MetalLB Controller image registry	docker.io
controller.image.repository	MetalLB Controller image repository	bitnami/metallb-controller
controller.image.tag	MetalLB Controller image tag (immutable tags are recommended)	0.10.2-debian-10-r94
controller.image.pullPolicy	MetalLB Controller image pull policy	IfNotPresent
controller.image.pullSecrets	Specify docker-registry secret names as an array	[]
controller.hostAliases	Deployment pod host aliases	[]
controller.rbac.create	create specifies whether to install and use RBAC rules.	true
controller.psp.create	create specifies whether to install Pod Security Policies.	true
controller.priorityClassName	Set pod priorityClassName	""
controller.resources.limits	The resources limits for the container	{}
controller.resources.requests	The requested resources for the container	{}
controller.nodeSelector	Node labels for controller pod assignment	{}
controller.tolerations	Tolerations for controller pod assignment	[]
controller.affinity	Affinity for controller pod assignment	{}
controller.podAnnotations	Controller Pod annotations	{}
controller.podLabels	Controller Pod labels	{}
controller.podAffinityPreset	Controller Pod affinitypreset. Allowed values: soft, hard	""
controller.podAntiAffinityPreset	Controller Pod anti affinitypreset. Allowed values: soft, hard	soft
controller.nodeAffinityPreset.type	Controller Pod Node affinity preset. Allowed values: soft, hard	""
controller.nodeAffinityPreset.key	Controller Pod Node affinity label key to match	""
controller.nodeAffinityPreset.values	Controller Pod Node affinity label values to match	[]
controller.serviceAccount.create	Specifies whether a ServiceAccount should be created	true
controller.serviceAccount.name	The name of the ServiceAccount to use. If not set and create is true, a name is generated using the fullname template	""
controller.securityContext.enabled	Enable pods' security context	true
controller.securityContext.runAsNonRoot	MetalLB Controller must runs as nonRoot.	true
controller.securityContext.runAsUser	User ID for the pods.	1001
controller.securityContext.fsGroup	Group ID for the pods.	1001
controller.securityContext.allowPrivilegeEscalation	This defines if privilegeEscalation is allowed on that container	false
controller.securityContext.readOnlyRootFilesystem	This defines if the container can read the root fs on the host	true
controller.securityContext.capabilities.drop	Drop capabilities for the securityContext	[]
controller.revisionHistoryLimit	Configure the revisionHistoryLimit of the Controller deployment	3
controller.terminationGracePeriodSeconds	Configure the grace time period for sig term	0
controller.containerPort.metrics	Configures the ports the MetalLB Controller listens on for metrics	7472
controller.livenessProbe.enabled	Enable livenessProbe	true
controller.livenessProbe.initialDelaySeconds	Initial delay seconds for livenessProbe	10
controller.livenessProbe.periodSeconds	Period seconds for livenessProbe	10
controller.livenessProbe.timeoutSeconds	Timeout seconds for livenessProbe	1
controller.livenessProbe.failureThreshold	Failure threshold for livenessProbe	3
controller.livenessProbe.successThreshold	Success threshold for livenessProbe	1
controller.readinessProbe.enabled	Enable readinessProbe	true
controller.readinessProbe.initialDelaySeconds	Initial delay seconds for readinessProbe	10
controller.readinessProbe.periodSeconds	Period seconds for readinessProbe	10
controller.readinessProbe.timeoutSeconds	Timeout seconds for readinessProbe	1
controller.readinessProbe.failureThreshold	Failure threshold for readinessProbe	3
controller.readinessProbe.successThreshold	Success threshold for readinessProbe	1
controller.prometheus.serviceMonitor.enabled	Specify if a servicemonitor will be deployed for prometheus-operator	false
controller.prometheus.serviceMonitor.jobLabel	Specify the jobLabel to use for the prometheus-operator	app.kubernetes.io/name
controller.prometheus.serviceMonitor.interval	Scrape interval. If not set, the Prometheus default scrape interval is used	""
controller.prometheus.serviceMonitor.metricRelabelings	Specify additional relabeling of metrics	[]
controller.prometheus.serviceMonitor.relabelings	Specify general relabeling	[]

Speaker parameters

Name	Description	Value
speaker.image.registry	MetalLB Speaker image registry	docker.io
speaker.image.repository	MetalLB Speaker image repository	bitnami/metallb-speaker
speaker.image.tag	MetalLB Speaker image tag (immutable tags are recommended)	0.10.2-debian-10-r98
speaker.image.pullPolicy	MetalLB Speaker image pull policy	IfNotPresent
speaker.image.pullSecrets	Specify docker-registry secret names as an array	[]
speaker.rbac.create	create specifies whether to install and use RBAC rules.	true
speaker.hostAliases	Deployment pod host aliases	[]
speaker.psp.create	create specifies whether to install Pod Security Policies.	true
speaker.priorityClassName	Set pod priorityClassName.	""
speaker.resources.limits	The resources limits for the container	{}
speaker.resources.requests	The requested resources for the container	{}
speaker.nodeSelector	Node labels for speaker pod assignment	{}
speaker.tolerations	Tolerations for speaker pod assignment	[]
speaker.affinity	Affinity for speaker pod assignment	{}
speaker.podAnnotations	Speaker Pod annotations	{}
speaker.podLabels	Speaker Pod labels	{}
speaker.serviceAccount.create	Specifies whether a ServiceAccount should be created	true
speaker.serviceAccount.name	The name of the ServiceAccount to use. If not set and create is true, a name is generated using the fullname template	""
speaker.daemonset.terminationGracePeriodSeconds	Configure the grace time period for sig term	2
speaker.daemonset.hostPorts.metrics	HTTP Metrics Endpoint	7472
speaker.secretName	References a Secret name for the member secret outside of the helm chart	""
speaker.secretKey	References a Secret key the member secret outside of the helm chart	""
speaker.secretValue	Custom value for speaker.secretKey	""
speaker.initContainers	Extra initContainers to add to the daemonset	[]
speaker.securityContext.enabled	Enable pods' security context	true
speaker.securityContext.runAsUser	User ID for the pods.	0
speaker.securityContext.allowPrivilegeEscalation	Enables privilege Escalation context for the pod.	false
speaker.securityContext.readOnlyRootFilesystem	Allows the pod to mount the RootFS as ReadOnly	true
speaker.securityContext.capabilities.drop	Drop capabilities for the securityContext	[]
speaker.securityContext.capabilities.add	Add capabilities for the securityContext	[]
speaker.extraEnvVars	Extra environment variable to pass to the running container.	[]
speaker.livenessProbe.enabled	Enable livenessProbe	true
speaker.livenessProbe.initialDelaySeconds	Initial delay seconds for livenessProbe	10
speaker.livenessProbe.periodSeconds	Period seconds for livenessProbe	10
speaker.livenessProbe.timeoutSeconds	Timeout seconds for livenessProbe	1
speaker.livenessProbe.failureThreshold	Failure threshold for livenessProbe	3
speaker.livenessProbe.successThreshold	Success threshold for livenessProbe	1
speaker.readinessProbe.enabled	Enable readinessProbe	true
speaker.readinessProbe.initialDelaySeconds	Initial delay seconds for readinessProbe	10
speaker.readinessProbe.periodSeconds	Period seconds for readinessProbe	10
speaker.readinessProbe.timeoutSeconds	Timeout seconds for readinessProbe	1
speaker.readinessProbe.failureThreshold	Failure threshold for readinessProbe	3
speaker.readinessProbe.successThreshold	Success threshold for readinessProbe	1
speaker.prometheus.serviceMonitor.enabled	Enable support for Prometheus Operator	false
speaker.prometheus.serviceMonitor.jobLabel	Job label for scrape target	app.kubernetes.io/name
speaker.prometheus.serviceMonitor.interval	Scrape interval. If not set, the Prometheus default scrape interval is used	""
speaker.prometheus.serviceMonitor.metricRelabelings	Specify additional relabeling of metrics	[]
speaker.prometheus.serviceMonitor.relabelings	Specify general relabeling	[]

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

$ helm install my-release \
  --set readinessProbe.successThreshold=5 \
    bitnami/metallb

The above command sets the readinessProbe.successThreshold to 5.

Configuration and installation details

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.

To configure MetalLB please look into the configuration section MetalLB Configuration.

Example Layer 2 configuration

configInline:
  # The address-pools section lists the IP addresses that MetalLB is
  # allowed to allocate, along with settings for how to advertise
  # those addresses over BGP once assigned. You can have as many
  # address pools as you want.
  address-pools:
  - # A name for the address pool. Services can request allocation
    # from a specific address pool using this name, by listing this
    # name under the 'metallb.universe.tf/address-pool' annotation.
    name: generic-cluster-pool
    # Protocol can be used to select how the announcement is done.
    # Supported values are bgp and layer2.
    protocol: layer2
    # A list of IP address ranges over which MetalLB has
    # authority. You can list multiple ranges in a single pool, they
    # will all share the same settings. Each range can be either a
    # CIDR prefix, or an explicit start-end range of IPs.
    addresses:
    - 10.27.50.30-10.27.50.35

Troubleshooting

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

Upgrading

To 2.0.0

What changes were introduced in this major version?

• The .Values.prometheus section was moved into the components .Values.controller.prometheus and .Values.speaker.prometheus
• The prometheus.prometheusRule which is used to toggle the deployment of the metallb alerts is moved under the root of the .Values.prometheusRule
• A globel .Values.psp.create and .Values.rbac.create was introduced together with the option of toggeling for each component. (global option overwrites component options)
  • Values.controller.rbac.create and Values.controller.psp.create
  • Values.speaker.rbac.create and Values.speaker.psp.create

Considerations when upgrading to this version

• Check if you used the prometheus section in you deployment.
• If you do so, place the configuration you made into the sections controller.prometheus and speaker.prometheus.
• prometheusRule should stay under the root of your values.

To 1.0.0

On November 13, 2020, Helm v2 support was formally finished, this major version is the result of the required changes applied to the Helm Chart to be able to incorporate the different features added in Helm v3 and to be consistent with the Helm project itself regarding the Helm v2 EOL.

What changes were introduced in this major version?

• Previous versions of this Helm Chart use apiVersion: v1 (installable by both Helm 2 and 3), this Helm Chart was updated to apiVersion: v2 (installable by Helm 3 only). Here you can find more information about the apiVersion field.
• The different fields present in the Chart.yaml file has been ordered alphabetically in a homogeneous way for all the Bitnami Helm Charts

Considerations when upgrading to this version

• If you want to upgrade to this version from a previous one installed with Helm v3, you shouldn't face any issues
• If you want to upgrade to this version using Helm v2, this scenario is not supported as this version doesn't support Helm v2 anymore
• If you installed the previous version with Helm v2 and wants to upgrade to this version with Helm v3, please refer to the official Helm documentation about migrating from Helm v2 to v3

Useful links

• https://docs.bitnami.com/tutorials/resolve-helm2-helm3-post-migration-issues/
• https://helm.sh/docs/topics/v2_v3_migration/
• https://helm.sh/blog/migrate-from-helm-v2-to-helm-v3/