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Install Crossplane

Crossplane can be easily installed into any existing Kubernetes cluster using the regularly published Helm chart. The Helm chart contains all the custom resources and controllers needed to deploy and configure Crossplane.

Pre-requisites

• Kubernetes cluster, minimum version v1.16.0+
• Helm, minimum version v3.0.0+.

Installation

Helm charts for Crossplane are currently published to the stable and master channels.

Stable

The stable channel is the most recent release of Crossplane that is considered ready for the community.

kubectl create namespace crossplane-system

helm repo add crossplane-stable https://charts.crossplane.io/stable
helm repo update

helm install crossplane --namespace crossplane-system crossplane-stable/crossplane --version 1.0.1

Master

The master channel contains the latest commits, with all automated tests passing. master is subject to instability, incompatibility, and features may be added or removed without much prior notice. It is recommended to use one of the more stable channels, but if you want the absolute newest Crossplane installed, then you can use the master channel.

To install the Helm chart from master, you will need to pass the specific version returned by the search command:

kubectl create namespace crossplane-system
helm repo add crossplane-master https://charts.crossplane.io/master/
helm repo update
helm search repo crossplane-master --devel

helm install crossplane --namespace crossplane-system crossplane-master/crossplane --devel --version <version>

Uninstalling the Chart

To uninstall/delete the crossplane deployment:

helm delete crossplane --namespace crossplane-system

That command removes all Kubernetes components associated with Crossplane, including all the custom resources and controllers.

Configuration

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

| Parameter | Description | Default | | — | — | — | | image.repository | Image | crossplane/crossplane | | image.tag | Image tag | master | | image.pullPolicy | Image pull policy | Always | | imagePullSecrets | Names of image pull secrets to use | dockerhub | | replicas | The number of replicas to run for the Crossplane pods | 1 | | deploymentStrategy | The deployment strategy for the Crossplane and RBAC Manager (if enabled) pods | RollingUpdate | | leaderElection | Enable leader election for Crossplane Managers pod | true | | priorityClassName | Priority class name for Crossplane and RBAC Manager (if enabled) pods | "" | | resourcesCrossplane.limits.cpu | CPU resource limits for Crossplane | 100m | | resourcesCrossplane.limits.memory | Memory resource limits for Crossplane | 512Mi | | resourcesCrossplane.requests.cpu | CPU resource requests for Crossplane | 100m | | resourcesCrossplane.requests.memory | Memory resource requests for Crossplane | 256Mi | | securityContextCrossplane.runAsUser | Run as user for Crossplane | 2000 | | securityContextCrossplane.runAsGroup | Run as group for Crossplane | 2000 | | securityContextCrossplane.allowPrivilegeEscalation | Allow privilege escalation for Crossplane | false | | securityContextCrossplane.readOnlyRootFilesystem | ReadOnly root filesystem for Crossplane | true | | packageCache.medium | Storage medium for package cache. Memory means volume will be backed by tmpfs, which can be useful for development. | "" | | packageCache.sizeLimit | Size limit for package cache. If medium is Memory then maximum usage would be the minimum of this value the sum of all memory limits on containers in the Crossplane pod. | 5Mi | | packageCache.pvc | Name of the PersistentVolumeClaim to be used as the package cache. Providing a value will cause the default emptyDir volume to not be mounted. | "" | | resourcesRBACManager.limits.cpu | CPU resource limits for RBAC Manager | 100m | | resourcesRBACManager.limits.memory | Memory resource limits for RBAC Manager | 512Mi | | resourcesRBACManager.requests.cpu | CPU resource requests for RBAC Manager | 100m | | resourcesRBACManager.requests.memory | Memory resource requests for RBAC Manager | 256Mi | securityContextRBACManager: | securityContextRBACManager.allowPrivilegeEscalation | Allow privilege escalation for RBAC Manager | false | | securityContextRBACManager.readOnlyRootFilesystem | ReadOnly root filesystem for RBAC Manager | true | | rbacManager.deploy | Deploy RBAC Manager and its required roles | true | | rbacManager.replicas | The number of replicas to run for the RBAC Manager pods | 1 | | rbacManager.leaderElection | Enable leader election for RBAC Managers pod | true | | rbacManager.managementPolicy| The extent to which the RBAC manager will manage permissions. All indicates to manage all Crossplane controller and user roles. Basic indicates to only manage Crossplane controller roles and the crossplane-admin, crossplane-edit, and crossplane-view user roles. | All | | alpha.oam.enabled | Deploy the crossplane/oam-kubernetes-runtime Helm chart | false | | metrics.enabled | Expose Crossplane and RBAC Manager metrics endpoint | false | | provider.packages | The list of Provider packages to install together with Crossplane | [] |

Command Line

You can pass the settings with helm command line parameters. Specify each parameter using the --set key=value[,key=value] argument to helm install. For example, the following command will install Crossplane with an image pull policy of IfNotPresent.

helm install --namespace crossplane-system crossplane-stable/crossplane --set image.pullPolicy=IfNotPresent

Settings File

Alternatively, a yaml file that specifies the values for the above parameters (values.yaml) can be provided while installing the chart.

helm install crossplane --namespace crossplane-system crossplane-stable/crossplane --version 1.0.1 -f values.yaml

Here are the sample settings to get you started.

replicas: 1

deploymentStrategy: RollingUpdate

image:
  repository: crossplane/crossplane
  tag: alpha
  pullPolicy: Always

imagePullSecrets:
- dockerhub