Gerrit is a web-based code review tool, which acts as a Git server. This helm chart provides a Gerrit setup that can be deployed on Kubernetes. In addition, the chart provides a CronJob to perform Git garbage collection.
Helm and Tiller (of course)
(Check out this guide how to install and use helm.)
Access to a provisioner for persistent volumes with Read Write Many (RWM)- capability.
A list of applicaple volume types can be found here. This project was developed using the NFS-server-provisioner helm chart, a NFS-provisioner deployed in the Kubernetes cluster itself. Refer to this guide of how to deploy it in context of this project.
A domain name that is configured to point to the IP address of the node running the Ingress controller on the kubernetes cluster (as described here).
(Optional: Required, if SSL is configured) A Java keystore to be used by Gerrit.
gerritMaster.ingress.host is required for rendering the chart's templates. The nature of the value does not allow defaults. Thus a custom values.yaml-file setting this value is required!To install the chart with the release name gerrit-master, execute:
cd $(git rev-parse --show-toplevel)/helm-charts helm install ./gerrit-master \ -n gerrit-master \ -f <path-to-custom-values>.yaml
The command deploys the Gerrit instance on the current Kubernetes cluster. The configuration section lists the parameters that can be configured during installation.
The following sections list the configurable values in values.yaml. To configure a Gerrit setup, make a copy of the values.yaml-file and change the parameters as needed. The configuration can be applied by installing the chart as described above.
In addition, single options can be set without creating a custom values.yaml:
cd $(git rev-parse --show-toplevel)/helm-charts helm install ./gerrit-master \ -n gerrit-master \ --set=gitRepositoryStorage.size=100Gi
| Parameter | Description | Default |
|---|---|---|
images.registry.name | The image registry to pull the container images from | `` |
images.registry.ImagePullSecret.name | Name of the ImagePullSecret | image-pull-secret (if empty no image pull secret will be deployed) |
images.registry.ImagePullSecret.create | Whether to create an ImagePullSecret | false |
images.registry.ImagePullSecret.username | The image registry username | nil |
images.registry.ImagePullSecret.password | The image registry password | nil |
images.version | The image version (image tag) to use | latest |
images.imagePullPolicy | Image pull policy | Always |
For information of how a StorageClass is configured in Kubernetes, read the official Documentation.
| Parameter | Description | Default |
|---|---|---|
storageClasses.default.name | The name of the default StorageClass (RWO) | default |
storageClasses.default.create | Whether to create the StorageClass | false |
storageClasses.default.provisioner | Provisioner of the StorageClass | kubernetes.io/aws-ebs |
storageClasses.default.reclaimPolicy | Whether to Retain or Delete volumes, when they become unbound | Delete |
storageClasses.default.parameters | Parameters for the provisioner | parameters.type: gp2, parameters.fsType: ext4 |
storageClasses.shared.name | The name of the shared StorageClass (RWM) | shared-storage |
storageClasses.shared.create | Whether to create the StorageClass | false |
storageClasses.shared.provisioner | Provisioner of the StorageClass | nfs |
storageClasses.shared.reclaimPolicy | Whether to Retain or Delete volumes, when they become unbound | Delete |
storageClasses.shared.parameters | Parameters for the provisioner | parameters.mountOptions: vers=4.1 |
| Parameter | Description | Default |
|---|---|---|
gitRepositoryStorage.externalPVC.use | Whether to use a PVC deployed outside the chart | false |
gitRepositoryStorage.externalPVC.name | Name of the external PVC | git-filesystem-pvc |
gitRepositoryStorage.size | Size of the volume storing the Git repositories | 5Gi |
If the git repositories should be persisted even if the chart is deleted and in a way that the volume containing them can be mounted by the reinstalled chart, the PVC claiming the volume has to be created independently of the chart. To use the external PVC, set gitRepositoryStorage.externalPVC.enabled to true and give the name of the PVC under gitRepositoryStorage.externalPVC.name.
| Parameter | Description | Default |
|---|---|---|
gitGC.image | Image name of the Git-GC container image | k8s-gerrit/git-gc |
gitGC.schedule | Cron-formatted schedule with which to run Git garbage collection | 0 6,18 * * * |
gitGC.resources | Configure the amount of resources the pod requests/is allowed | requests.cpu: 100m |
requests.memory: 256Mi | ||
limits.cpu: 100m | ||
limits.memory: 256Mi | ||
gitGC.logging.persistence.enabled | Whether to persist logs | true |
gitGC.logging.persistence.size | Storage size for persisted logs | 1Gi |
| Parameter | Description | Default |
|---|---|---|
gerritMaster.images.gerritInit | Image name of the Gerrit init container image | k8s-gerrit/gerrit-init |
gerritMaster.images.gerritMaster | Image name of the Gerrit master container image | k8s-gerrit/gerrit-master |
gerritMaster.replicas | Number of replica pods to deploy | 1 |
gerritMaster.maxSurge | Max. percentage or number of pods allowed to be scheduled above the desired number | 25% |
gerritMaster.maxUnavailable | Max. percentage or number of pods allowed to be unavailable at a time | 100% |
gerritMaster.resources | Configure the amount of resources the pod requests/is allowed | requests.cpu: 1 |
requests.memory: 5Gi | ||
limits.cpu: 1 | ||
limits.memory: 6Gi | ||
gerritMaster.persistence.enabled | Whether to persist the Gerrit site | true |
gerritMaster.persistence.size | Storage size for persisted Gerrit site | 10Gi |
gerritMaster.service.type | Which kind of Service to deploy | NodePort |
gerritMaster.service.http.port | Port over which to expose HTTP | 80 |
gerritMaster.ingress.host | REQUIRED: Host name to use for the Ingress (required for Ingress) | nil |
gerritMaster.ingress.additionalAnnotations | Additional annotations for the Ingress | nil |
gerritMaster.ingress.tls.enabled | Whether to enable TLS termination in the Ingress | false |
gerritMaster.ingress.tls.cert | Public SSL server certificate | -----BEGIN CERTIFICATE----- |
gerritMaster.ingress.tls.key | Private SSL server certificate | -----BEGIN RSA PRIVATE KEY----- |
gerritMaster.keystore | base64-encoded Java keystore (`cat keystore.jks | base64`) to be used by Gerrit, when using SSL |
gerritMaster.config.gerrit | The contents of the gerrit.config | see here |
gerritMaster.config.secure | The contents of the secure.config | see here |
gerritMaster.config.replication | The contents of the replication.config | see here |
The gerrit-master chart provides a ConfigMap containing the gerrit.config as well as replication.config and a Secret containing the secure.config to configure the Gerrit installation in the Gerrit component. The content of the config files can be set in the values.yaml under the keys gerritMaster.config.gerrit, gerritMaster.config.replication and gerritMaster.config.secure respectively. All configuration options are described in detail in the official documentation of Gerrit. Some options however have to be set in a specified way for Gerrit to work as intended with the chart:
gerrit.basePath
Path to the directory containing the repositories. The chart mounts this directory from a persistent volume to /var/gerrit/git in the container. For Gerrit to find the correct directory, this has to be set to git.
gerrit.serverId
In Gerrit-version higher than 2.14 Gerrit needs a server ID, which is used by NoteDB. Gerrit would usually generate a random ID on startup, but since the gerrit.config file is read only, when mounted as a ConfigMap this fails. Thus the server ID has to be set manually!
gerrit.canonicalWebUrl
The canonical web URL has to be set to the Ingress host.
httpd.listenURL
This has to be set to proxy-http://*:8080/ or proxy-https://*:8080, depending of TLS is enabled in the Ingress or not, otherwise the Jetty servlet will run into an endless redirect loop.
container.user
The technical user in the Gerrit container is called gerrit. Thus, this value is required to be gerrit.
container.javaHome
This has to be set to /usr/lib/jvm/java-8-openjdk-amd64, since this is the path of the Java installation in the container.
container.javaOptions
The maximum heap size has to be set. And its value has to be lower than the memory resource limit set for the container (e.g. -Xmx4g). In your calculation, allow memory for other components running in the container.
To upgrade an existing installation of the gerrit-master chart, e.g. to install a newer chart version or to use an updated custom values.yaml-file, execute the following command:
cd $(git rev-parse --show-toplevel)/helm-charts helm upgrade <release-name> \ -f <path-to-custom-values>.yaml \ ./gerrit-master
To delete the chart from the cluster, use:
helm delete <release-name> \ --purge