Helm

KubeVela’s Helm component meets the needs of users to connect to Helm Chart. You can deploy any ready-made Helm chart software package from Helm Repo, Git Repo or OSS bucket through the Helm component, and overwrite its parameters.

Deploy From Helm Repo

In this Application, we hope to deliver a component called redis-comp. It is a chart from the bitnami.

cat <<EOF | kubectl apply -f -
apiVersion: core.oam.dev/v1beta1
kind: Application
metadata:
  name: app-delivering-chart
spec:
  components:
    - name: redis-comp
      type: helm
      properties:
        chart: redis-cluster
        version: 6.2.7
        url: https://charts.bitnami.com/bitnami
        repoType: helm
EOF

Please copy the above code block and deploy it directly to the runtime cluster:

application.core.oam.dev/app-delivering-chart created

Finally, we use vela ls to view the application status after successful delivery:

APP                     COMPONENT   TYPE        TRAITS  PHASE   HEALTHY STATUS  CREATED-TIME                 
app-delivering-chart    redis-comp  helm                running healthy         2021-08-28 18:48:21 +0800 CST

We also see that the PHASE of the app-delivering-chart APP is running and the STATUS is healthy.

Attributes

Parameters	Description	Example
repoType	required, indicates where it’s from	Helm
pullInterval	optional, synchronize with Helm Repo, tunning interval and 5 minutes by default	10m
url	required, Helm Reop address, it supports http/https	https://charts.bitnami.com/bitnami
secretRef	optional, The name of the Secret object that holds the credentials required to pull the repo. The username and password fields must be included in the HTTP/S basic authentication Secret. For TLS the secret must contain a certFile and keyFile, and/or caCert fields. For TLS authentication, the secret must contain a certFile / keyFile field and/or caCert field.	sec-name
timeout	optional, timeout for pulling repo index	60s
chart	required, chart title	redis-cluster
version	optional, chart version, * by default	6.2.7
targetNamespace	optional, the namespace to install chart, decided by chart itself	your-ns
releaseName	optional, release name after installed	your-rn
values	optional, override the Values.yaml inchart, using for the rendering of Helm

Deploy From OSS bucket

Parameters	Description	Example
repoType	required, indicates where it’s from	oss
pullInterval	optional, synchronize with bucket, tunning interval and 5 minutes by default	10m
url	required, bucket’s endpoint and no need to fill in with scheme	oss-cn-beijing.aliyuncs.com
secretRef	optional, Save the name of a Secret, which is the credential to read the bucket. Secret contains accesskey and secretkey fields	sec-name
timeout	optional, The timeout period of the download operation, the default is 20s	60s
chart	required, Chart storage path (key)	./chart/podinfo-5.1.3.tgz
version	optional, In OSS source, this parameter has no effect
targetNamespace	optional, The namespace of the installed chart, which is determined by the chart itself by default	your-ns
releaseName	optional, Installed release name	your-rn
values	optional, Overwrite the Values.yaml of the chart for Helm rendering.
oss.bucketName	required, bucket name	your-bucket
oss.provider	optional, Optional generic or aws, fill in aws if the certificate is obtained from aws EC2. The default is generic.	generic
oss.region	optional, bucket region

How-to

(Opentional) If your OSS bucket needs identity verification, create a Secret:

$ kubectl create secret generic bucket-secret --from-literal=accesskey=<your-ak> --from-literal=secretkey=<your-sk>
secret/bucket-secret created

Example

apiVersion: core.oam.dev/v1beta1
kind: Application
metadata:
  name: bucket-app
spec:
  components:
    - name: bucket-comp
      type: helm
      properties:
        repoType: oss
        # required if bucket is private
        secretRef: bucket-secret
        chart: ./chart/podinfo-5.1.3.tgz
        url: oss-cn-beijing.aliyuncs.com
        oss:
            bucketName: definition-registry

Deploy From Git Repo

Parameters	Description	Example
repoType	required, indicates where it’s from	git
pullInterval	optional, synchronize with Git Repo, tunning interval and 5 minutes by default	10m
url	required, Git Repo address	https://github.com/oam-dev/terraform-controller
secretRef	optional, The name of the Secret object that holds the credentials required to pull the Git repository. For HTTP/S basic authentication, the Secret must contain the username and password fields. For SSH authentication, the identity, identity.pub and known_hosts fields must be included	sec-name
timeout	optional, The timeout period of the download operation, the default is 20s	60s
chart	required, Chart storage path (key)	./chart/podinfo-5.1.3.tgz
version	optional, In Git source, this parameter has no effect
targetNamespace	optional, the namespace to install chart, decided by chart itself	your-ns
releaseName	optional, Installed release name	your-rn
values	optional, Overwrite the Values.yaml of the chart for Helm rendering.
git.branch	optional, Git branch, master by default	dev

How-to

apiVersion: core.oam.dev/v1beta1
kind: Application
metadata:
   name: app-delivering-chart
spec:
   components:
     - name: terraform-controller
       type: helm
       properties:
          repoType: git
          url: https://github.com/oam-dev/terraform-controller
          chart: ./chart
          git:
            branch: master