Addons are applications managed by the Kubeaddons controller. The controller is installed as part of a Konvoy cluster. To manage implicit dependencies between applications, the custom resources Addon and ClusterAddon are used. These resources define the application installation location, the application dependencies, and suitable providers for an application.
Addon and ClusterAddon records are then installed using the Kubernetes API. The kubeaddons controller manages the reconciliation of those definitions to install applications in the correct order.
Konvoy installs the kubeaddons controller as part of
konvoy up during the
deploy addons stage.
If you remove the kubeaddons controller deployment and need to reinstall it, you can run
konvoy deploy addons.
A set of addons is added to your
cluster.yaml file as part of
Addons are sets of applications, configured and tested to work together, that provide monitoring, logging, alerting, and backups.
Additional addons can be configured from other repositories such as our enterprise or community addon repositories, or your own custom repository.
Addons are configured as part of the ClusterConfiguration record in the
Addons are part of a git
configRepository tagged as a
Each of the items in the
addonsList is an addon in that repository which has three possible keys: name, enabled, and values.
name matches a name in an Addon record in that repository.
enabled specifies if that addon is enabled and should be installed.
A value of
false indicates that addon should not be installed.
This is similar to omitting the addon from the list, but is used as a placeholder to make identification of possible addons to enable easier.
Addons that are enabled by default should remain enabled as other addons may depend on them.
values are used to override values that are passed to helm charts.
This field is not currently used for kudo operators and has no equivalent.
kind: ClusterConfiguration apiVersion: konvoy.mesosphere.io/v1beta2 metadata: name: "1.3" creationTimestamp: "2020-01-15T02:01:07Z" spec: ... addons: - configRepository: https://github.com/mesosphere/kubernetes-base-addons configVersion: stable-1.18-3.0.0 addonsList: - name: cert-manager enabled: true - name: external-dns enabled: false
In this example,
cert-manager is installed with the D2iQ recommended configuration set in the
kubernetes-base-addons repository on github as of the
external-dns is not enabled, but can be enabled if needed.
More advanced capabilities are also available.
Override helm chart values
For a bare-metal cluster (
konvoy init --provisioner=none),
metallb is enabled and a configuration template is provided.
If you add a list of addresses for metallb to use, it assigns those addresses to your LoadBalancer type Services.
... - name: metallb enabled: true values: | configInline: address-pools: - name: default protocol: layer2 # configure addresses for your network addresses: 
Add an addon from the Enterprise repository
addons: - configRepository: https://github.com/mesosphere/kubernetes-base-addons configVersion: stable-1.18-3.0.0 addonsList: - name: cert-manager enabled: true ... - configRepository: https://github.com/mesosphere/kubeaddons-enterprise configVersion: v0.0.3 addonsList: - name: zookeeper enabled: true
Advanced Application of Kubeaddons
The Kubeaddons operator can be used to pattern and install your sets of software for your internal use, or for public consumption.
Create an addon repository for your applications
Create a git repository that can be reached from a pod inside your cluster. You can read more about that in our Addon Repositories tutorial.
See the D2iQ base addons repository for an example and documentation of the repository structure.
Use an Addon record to define customized defaults and dependencies. As shown in the example below, the metadata is where you define the name, namespace, labels, and annotations. Labels are used for dependency checking. Annotations are optional, but can be used for displaying the addon in the kommander catalog.
spec is where the custom resource is defined.
cloudProvider list for defining the cloud providers enabled or disabled by default.
If omitted or empty, the Addon is enabled for all cloud providers.
You can also define
values as part of a provider. Values are added to the
cluster.yaml file if that provider is selected.
Define dependencies using the
In this example, kibana will not initialize correctly if elasticsearch isn’t running when it starts.
To satisfy this requirement there is a
matchLabels entry that matches an addon whose label
kubeaddons.mesosphere.io/name has the value
The controller waits to install the kibana addon until the matching elasticsearch addon is installed and in a
apiVersion: kubeaddons.mesosphere.io/v1beta1 kind: Addon metadata: name: kibana namespace: kubeaddons labels: kubeaddons.mesosphere.io/name: kibana annotations: catalog.kubeaddons.mesosphere.io/addon-revision: "6.8.0-1" appversion.kubeaddons.mesosphere.io/kibana: "6.8.2" endpoint.kubeaddons.mesosphere.io/kibana: "/ops/portal/kibana" docs.kubeaddons.mesosphere.io/kibana: "https://www.elastic.co/guide/en/kibana/6.8/index.html" values.chart.helm.kubeaddons.mesosphere.io/kibana: "https://raw.githubusercontent.com/mesosphere/charts/505a69c/stable/kibana/values.yaml" spec: kubernetes: minSupportedVersion: v1.15.6 cloudProvider: - name: aws enabled: true - name: azure enabled: true - name: docker enabled: false - name: none enabled: true requires: - matchLabels: kubeaddons.mesosphere.io/name: elasticsearch chartReference: chart: stable/kibana # repo: https://mesosphere.github.io/charts/ version: 3.2.5 values: | --- image: tag: "6.8.2"
The above example is for a helm chart.
This is expressed using the
version keys reference the helm chart name and version.
Use the optional
repo key to point to a custom repository.
repo is not specified, the default helm chart repo is used.
Override the default chart values using the
Changes made here are merged with the chart’s
values.yaml file when applied using helm.
To define a kudo addon, replace the
chartReference definition with a
kudoReference: package: kafka repo: https://kudo-repository.storage.googleapis.com/ version: 1.0.0
Similarly to helm, you select the name from the repository with the
Select the repository with the
Specify the version with the
There is no way to override the kudo operator’s
params at this time.