Yahav Biran
ea4c96ac55
* Adding tomcat 7.0 chart * Fixing trailing spaces and wrong indentation * Add icon in Chart.yaml * App Version in Chart.yaml * add table to explain the configurable components and fix labels * add liveness and readiness probes * modify app lables and fix probe ports * fix github user, remove MIT license, fix prereq version, align table, update _helpers.tpl, fix resource names, selectors, remove default tolerations, fix service ports * fix config table * fix maintainers names * fix wrong indentation in values.yaml * adjusting to helm v2.9.0 template * indentation style fix, add hard coded ports, add doc to webarchive in docker hub, use of tomcat official image, remove version from deploy directory, fix versions, fix tomcat icon, fix tag in README, remove /smaple app name from probes * fixing indentation * Fix indentation * Fix service * Fix deployment * Comment out defaults for resources * Update appsrv.yaml * Fix error converting YAML to JSON: yaml: line 50: mapping values are not allowed in this context * fix indent - readinessProbe.httpGet.port * fix liveness probe to ensure app deployment
Tomcat
Tomcat is is an open source implementation of the Java Servlet, JavaServer Pages, Java Expression Language and Java WebSocket technologies.
Introduction
This chart creates a tomcat application server Deployment, plus http Services for the server. The chart offers an optimization for application updates running in a servlet container-type engines like tomcat and Jboss. The chart uses the WAR, EAR, and other deployable components outside of the Servlet engine as sidecar container so application upgrades requires the sidecar container image only to be updated and not the Servlet engine as if both would run at the same image.
Prerequisites
- Kubernetes 1.8+
Provider-specific Prerequisites
Installing the Chart
To install the chart with the release name my-release:
$ helm install --name my-release stable/tomcat
This command deploys a tomcat dedicated server with sane defaults.
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 table lists the configurable parameters of the tomcat chart and their default values.
| Parameter | Description | Default |
|---|---|---|
image.webarchive.repository |
Sidecar image source repository name | ananwaresystems/webarchive |
image.webarchive.tag |
webarchive release tag. |
1.0 |
image.tomcat.repository |
Tomact image source repository name | tomcat |
image.tomcat.tag |
tomcat release tag. |
7.0 |
image.pullPolicy |
Image pull policy | IfNotPresent |
deploy.directory |
Webarchive deployment directory | /usr/local/tomcat/webapps |
service.name |
Tomcat service name | http |
service.externalPort |
Kubernetes service port | 80 |
service.internalPort |
Tomcat front port | 8080 |
service.type |
Kubernetes service type | LoadBalancer |
resources |
CPU/Memory resource requests/limits | {} |
nodeSelector |
Node affinity | {} |
tolerations |
Node tolerations | {} |
Refer to values.yaml for the full run-down on defaults. These are a mixture of Kubernetes and tomcat-related directives that map to environment variables.
Specify each parameter using the --set key=value[,key=value] argument to helm install. For example,
$ helm install --name my-release \
--set Values.someval=My Server,ImageTag=1.0 \
stable/tomcat
The above command deploys Tomcat dedicated with a server name of My Server and docker-tomcat image version 1.0.
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 stable/stable
Tip
: You can use the default values.yaml
Persistence
"An emptyDir volume is first created when a Pod is assigned to a Node, and exists as long as that Pod is running on that node. When a Pod is removed from a node for any reason, the data in the emptyDir is deleted forever."