charts/bitnami/apache

Apache

The Apache HTTP Server Project is an effort to develop and maintain an open-source HTTP server for modern operating systems including UNIX and Windows NT. The goal of this project is to provide a secure, efficient and extensible server that provides HTTP services in sync with the current HTTP standards.

The Apache HTTP Server ("httpd") was launched in 1995 and it has been the most popular web server on the Internet since April 1996. It has celebrated its 20th birthday as a project in February 2015.

TL;DR

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

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 Apache deployment 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

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/apache

These commands deploy Apache on the Kubernetes cluster in the default configuration.

Tip

: List all releases using helm list

Uninstalling the Chart

To uninstall/delete the my-release deployment:

$ helm delete my-release

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

Global parameters

Parameter	Description	Default
global.imageRegistry	Global Docker image registry	nil
global.imagePullSecrets	Global Docker registry secret names as an array	[] (does not add image pull secrets to deployed pods)

Common parameters

Parameter	Description	Default
nameOverride	String to partially override common.names.fullname	nil
fullnameOverride	String to fully override common.names.fullname	nil
commonLabels	Labels to add to all deployed objects	{}
commonAnnotations	Annotations to add to all deployed objects	{}
extraDeploy	Array of extra objects to deploy with the release	[] (evaluated as a template)
kubeVersion	Force target Kubernetes version (using Helm capabilities if not set)	nil

Parameters

The following tables lists the configurable parameters of the Apache chart and their default values.

Parameter	Description	Default
image.registry	Apache Docker image registry	docker.io
image.repository	Apache Docker image name	bitnami/apache
image.tag	Apache Docker image tag	{TAG_NAME}
image.pullPolicy	Apache Docker image pull policy	Always
image.pullSecrets	Specify Docker registry secret names as an array	[] (does not add image pull secrets to deployed pods)
git.registry	Git image registry	docker.io
git.repository	Git image name	bitnami/git
git.tag	Git image tag	{TAG_NAME}
git.pullPolicy	Git image pull policy	Always
git.pullSecrets	Specify docker-registry secret names as an array	[] (does not add image pull secrets to deployed pods)
replicaCount	Number of replicas of the Apache deployment	docker.io
hostAliases	Add deployment host aliases	Check values.yaml
htdocsConfigMap	ConfigMap with the server static content	nil
htdocsPVC	PVC with the server static content	nil
vhostsConfigMap	ConfigMap with the virtual hosts content	nil
httpdConfConfigMap	ConfigMap with the httpd.conf content	nil
cloneHtdocsFromGit.enabled	Get the server static content from a git repository	false
cloneHtdocsFromGit.repository	Repository to clone static content from	nil
cloneHtdocsFromGit.branch	Branch inside the git repository	nil
cloneHtdocsFromGit.interval	Interval for sidecar container pull from the repository	60
cloneHtdocsFromGit.resources	Init container git resource requests/limit	{}
cloneHtdocsFromGit.extraVolumeMounts	Add extra volume mounts for the GIT containers	[]
podLabels	Extra labels for Apache pods	{} (evaluated as a template)
podAnnotations	Pod annotations	{} (evaluated as a template)
podAffinityPreset	Pod affinity preset. Ignored if affinity is set. Allowed values: soft or hard	""
podAntiAffinityPreset	Pod anti-affinity preset. Ignored if affinity is set. Allowed values: soft or hard	soft
nodeAffinityPreset.type	Node affinity preset type. Ignored if affinity is set. Allowed values: soft or hard	""
nodeAffinityPreset.key	Node label key to match Ignored if affinity is set.	""
nodeAffinityPreset.values	Node label values to match. Ignored if affinity is set.	[]
affinity	Affinity for pod assignment	{} (evaluated as a template)
nodeSelector	Node labels for pod assignment	{} (evaluated as a template)
tolerations	Tolerations for pod assignment	[] (evaluated as a template)
livenessProbe.enabled	Enable liveness probe	true
livenessProbe.path	Path to access on the HTTP server	/
readinessProbe.enabled	Enable readiness probe	true
readinessProbe.path	Path to access on the HTTP server	/
ingress.enabled	Enable ingress controller resource	false
ingress.apiVersion	Force Ingress API version (automatically detected if not set)	``
ingress.path	Ingress path	/
ingress.pathType	Ingress path type	ImplementationSpecific
ingress.hostname	Default host for the ingress resource	example.local
ingress.certManager	Add annotations for cert-manager	false
ingress.annotations	Ingress annotations	[]
ingress.hosts[0].name	Hostname to your Apache installation	example.local
ingress.hosts[0].path	Path within the url structure	/
ingress.tls[0].hosts[0]	TLS hosts	example.local
ingress.tls[0].secretName	TLS Secret (certificates)	example.local-tls
ingress.secrets[0].name	TLS Secret Name	nil
ingress.secrets[0].certificate	TLS Secret Certificate	nil
ingress.secrets[0].key	TLS Secret Key	nil
metrics.enabled	Start a side-car prometheus exporter	false
metrics.image.registry	Apache exporter image registry	docker.io
metrics.image.repository	Apache exporter image name	lusotycoon/apache-exporter
metrics.image.tag	Apache exporter image tag	v0.5.0
metrics.image.pullPolicy	Apache exporter image pull policy	IfNotPresent
metrics.image.pullSecrets	Specify Docker registry secret names as an array	[] (does not add image pull secrets to deployed pods)
metrics.podAnnotations	Additional annotations for Metrics exporter pod	{prometheus.io/scrape: "true", prometheus.io/port: "9117"}
metrics.resources	Exporter resource requests/limit	{}
service.type	Kubernetes Service type	LoadBalancer
service.port	Service HTTP port	80
service.httpsPort	Service HTTPS port	443
service.nodePorts.http	Kubernetes http node port	""
service.nodePorts.https	Kubernetes https node port	""
service.externalTrafficPolicy	Enable client source IP preservation	Cluster
service.loadBalancerIP	LoadBalancer service IP address	""
extraVolumes	Array to add extra volumes	[] (evaluated as a template)
extraVolumeMounts	Array to add extra mount	[] (evaluated as a template)
extraEnvVars	Array to add extra environment variables	[] (evaluated as a template)
initContainers	Add additional init containers to the Apache pods	{} (evaluated as a template)
sidecars	Add additional sidecar containers to the Apache pods	{} (evaluated as a template)

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

$ helm install my-release \
  --set imagePullPolicy=Always \
    bitnami/apache

The above command sets the imagePullPolicy to Always.

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 bitnami/apache

Tip

: You can use the default values.yaml

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.

Deploying a custom web application

The Apache chart allows you to deploy a custom web application using one of the following methods:

• Cloning from a git repository: Set cloneHtdocsFromGit.enabled to true and set the repository and branch using the cloneHtdocsFromGit.repository and cloneHtdocsFromGit.branch parameters. A sidecar will also pull the latest changes in an interval set by cloneHtdocsFromGit.interval.
• Providing a ConfigMap: Set the htdocsConfigMap value to mount a ConfigMap in the Apache htdocs folder.
• Using an existing PVC: Set the htdocsPVC value to mount an PersistentVolumeClaim with the web application content.

Refer to the chart documentation for more information.

Setting Pod's affinity

This chart allows you to set your custom affinity using the affinity parameter. 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 in the bitnami/common chart. To do so, set the podAffinityPreset, podAntiAffinityPreset, or nodeAffinityPreset parameters.

Troubleshooting

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

Notable changes

7.4.0

This version also introduces bitnami/common, a library chart as a dependency. More documentation about this new utility could be found here. Please, make sure that you have updated the chart dependencies before executing any upgrade.

7.0.0

This release updates the Bitnami Apache container to 2.4.41-debian-9-r40, which is based on Bash instead of Node.js.

6.0.0

This release allows you to use your custom static application. In order to do so, check this section.

Upgrading

To 8.0.0

On November 13, 2020, Helm v2 support formally ended. 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.

Learn more about this change and related upgrade considerations.

To 2.0.0

Backwards compatibility is not guaranteed unless you modify the labels used on the chart's deployments. Use the workaround below to upgrade from versions previous to 2.0.0. The following example assumes that the release name is apache:

$ kubectl patch deployment apache --type=json -p='[{"op": "remove", "path": "/spec/selector/matchLabels/chart"}]'