Tomcat
Apache Tomcat, often referred to as Tomcat, is an open-source web server and servlet container developed by the Apache Software Foundation. Tomcat implements several Java EE specifications including Java Servlet, JavaServer Pages, Java EL, and WebSocket, and provides a "pure Java" HTTP web server environment for Java code to run in.
TL;DR;
$ helm install bitnami/tomcat
Introduction
This chart bootstraps a Tomcat deployment on a Kubernetes cluster using the Helm package manager.
Prerequisites
- Kubernetes 1.4+ with Beta APIs enabled
- PV provisioner support in the underlying infrastructure
Installing the Chart
To install the chart with the release name my-release:
$ helm install --name my-release bitnami/tomcat
The command deploys Tomcat on the Kubernetes cluster in the default configuration. The configuration 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 deployment:
$ helm delete my-release
The command removes all the Kubernetes components associated with the chart and deletes the release.
Configuration
The following tables lists the configurable parameters of the Tomcat chart and their default values.
| Parameter | Description | Default |
|---|---|---|
image.registry |
Tomcat image registry | docker.io |
image.repository |
Tomcat Image name | bitnami/tomcat |
image.tag |
Tomcat Image tag | {VERSION} |
image.pullPolicy |
Tomcat image pull policy | Always if imageTag is latest, else IfNotPresent |
image.pullSecrets |
Specify image pull secrets | nil (does not add image pull secrets to deployed pods) |
tomcatUsername |
Tomcat admin user | user |
tomcatPassword |
Tomcat admin password | random 10 character alphanumeric string |
tomcatAllowRemoteManagement |
Enable remote access to management interface | 0 (disabled) |
serviceType |
Kubernetes Service type | LoadBalancer |
persistence.enabled |
Enable persistence using PVC | true |
persistence.storageClass |
PVC Storage Class for Tomcat volume | nil (uses alpha storage class annotation) |
persistence.accessMode |
PVC Access Mode for Tomcat volume | ReadWriteOnce |
persistence.size |
PVC Storage Request for Tomcat volume | 8Gi |
resources |
CPU/Memory resource requests/limits | Memory: 512Mi, CPU: 300m |
The above parameters map to the env variables defined in bitnami/tomcat. For more information please refer to the bitnami/tomcat image documentation.
Specify each parameter using the --set key=value[,key=value] argument to helm install. For example,
$ helm install --name my-release \
--set tomcatUser=manager,tomcatPassword=password bitnami/tomcat
The above command sets the Tomcat management username and password to manager and password respectively.
Alternatively, a YAML file that specifies the values for the parameters can be provided while installing the chart. For example,
$ helm install --name my-release -f values.yaml bitnami/tomcat
Tip
: You can use the default values.yaml
Persistence
The Bitnami Tomcat image stores the Tomcat data and configurations at the /bitnami/tomcat path of the container.
Persistent Volume Claims are used to keep the data across deployments. This is known to work in GCE, AWS, and minikube. See the Configuration section to configure the PVC or to disable persistence.