Crossplane

In this documentation, we will use Alibaba Cloud's RDS (Relational Database Service), and Alibaba Cloud's OSS (Object Storage System) as examples to show how to enable cloud services as part of the application deployment.

These cloud services are provided by Crossplane.

Prepare Crossplane

Details

Please Refer to [Installation](https://github.com/crossplane/provider-alibaba/releases/tag/v0.5.0) to install Crossplane Alibaba provider v0.5.0.

If you'd like to configure any other Crossplane providers, please refer to Crossplane Select a Getting Started Configuration.

$ kubectl crossplane install provider crossplane/provider-alibaba:v0.5.0

# Note the xxx and yyy here is your own AccessKey and SecretKey to the cloud resources.
$ kubectl create secret generic alibaba-account-creds -n crossplane-system --from-literal=accessKeyId=xxx --from-literal=accessKeySecret=yyy

$ kubectl apply -f provider.yaml

provider.yaml is as below.

apiVersion: v1
kind: Namespace
metadata:
  name: crossplane-system

---
apiVersion: alibaba.crossplane.io/v1alpha1
kind: ProviderConfig
metadata:
  name: default
spec:
  credentials:
    source: Secret
    secretRef:
      namespace: crossplane-system
      name: alibaba-account-creds
      key: credentials
  region: cn-beijing

Register alibaba-rds Component

apiVersion: core.oam.dev/v1beta1
kind: ComponentDefinition
metadata:
  name: alibaba-rds
  namespace: vela-system
  annotations:
    definition.oam.dev/description: "Alibaba Cloud RDS Resource"
spec:
  workload:
    definition:
      apiVersion: database.alibaba.crossplane.io/v1alpha1
      kind: RDSInstance
  schematic:
    cue:
      template: |
        output: {
            apiVersion: "database.alibaba.crossplane.io/v1alpha1"
            kind:       "RDSInstance"
            spec: {
                forProvider: {
                    engine:                parameter.engine
                    engineVersion:         parameter.engineVersion
                    dbInstanceClass:       parameter.instanceClass
                    dbInstanceStorageInGB: 20
                    securityIPList:        "0.0.0.0/0"
                    masterUsername:        parameter.username
                }
                writeConnectionSecretToRef: {
                    namespace: context.namespace
                    name:      parameter.secretName
                }
                providerConfigRef: {
                    name: "default"
                }
                deletionPolicy: "Delete"
            }
        }
        parameter: {
            // +usage=RDS engine
            engine: *"mysql" | string
            // +usage=The version of RDS engine
            engineVersion: *"8.0" | string
            // +usage=The instance class for the RDS
            instanceClass: *"rds.mysql.c1.large" | string
            // +usage=RDS username
            username: string
            // +usage=Secret name which RDS connection will write to
            secretName: string
        }

Register alibaba-oss Component

apiVersion: core.oam.dev/v1beta1
kind: ComponentDefinition
metadata:
  name: alibaba-oss
  namespace: vela-system
  annotations:
    definition.oam.dev/description: "Alibaba Cloud RDS Resource"
spec:
  workload:
    definition:
      apiVersion: oss.alibaba.crossplane.io/v1alpha1
      kind: Bucket
  schematic:
    cue:
      template: |
        output: {
            apiVersion: "oss.alibaba.crossplane.io/v1alpha1"
            kind:       "Bucket"
            spec: {
                name:               parameter.name
                acl:                parameter.acl
                storageClass:       parameter.storageClass
                dataRedundancyType: parameter.dataRedundancyType
                writeConnectionSecretToRef: {
                    namespace: context.namespace
                    name:      parameter.secretName
                }
                providerConfigRef: {
                    name: "default"
                }
                deletionPolicy: "Delete"
            }
        }
        parameter: {
            // +usage=OSS bucket name
            name: string
            // +usage=The access control list of the OSS bucket
            acl: *"private" | string
            // +usage=The storage type of OSS bucket
            storageClass: *"Standard" | string
            // +usage=The data Redundancy type of OSS bucket
            dataRedundancyType: *"LRS" | string
            // +usage=Secret name which RDS connection will write to
            secretName: string
        }