Add Doris Cluster resource definition

Doris Operator extends Kubernetes with Custom Resource Definition (CRD). The CRD of Doris Cluster encapsulates the description of Doris objects, such as the description of FE or BE. For details, please refer to [doris-operator-api](https://github.com/selectdb/doris-operator/blob/master /doc/api.md). Before deploying Doris, you need to create the CRD of Doris Cluster.

Doris Cluster CRD can be deployed in a Kubernetes environment with the following command:

kubectl create -f https://raw.githubusercontent.com/selectdb/doris-operator/master/config/crd/bases/doris.selectdb.com_dorisclusters.yaml

If there is no external network, download the CRD file to your local computer first:

wget https://raw.githubusercontent.com/selectdb/doris-operator/master/config/crd/bases/doris.selectdb.com_dorisclusters.yaml
kubectl create -f ./doris.selectdb.com_dorisclusters.yaml

The following is the expected output:

customresourcedefinition.apiextensions.k8s.io/dorisclusters.doris.selectdb.com created

After the Doris Cluster CRD is created, you can view the created CRD with the following command.

kubectl get crd | grep doris

The following is the expected output:

dorisclusters.doris.selectdb.com                      2024-02-22T16:23:13Z

Add Doris Operator

Solution 1: Quickly deploy Doris Operator

You can directly pull the Doris Operator template in the warehouse for quick deployment.

Doris Operator can be deployed in a Kubernetes cluster using the following command:

kubectl apply -f https://raw.githubusercontent.com/selectdb/doris-operator/master/config/operator/operator.yaml

The following is the expected output:

namespace/doris created
role.rbac.authorization.k8s.io/leader-election-role created
rolebinding.rbac.authorization.k8s.io/leader-election-rolebinding created
clusterrole.rbac.authorization.k8s.io/doris-operator created
clusterrolebinding.rbac.authorization.k8s.io/doris-operator-rolebinding created
serviceaccount/doris-operator created
deployment.apps/doris-operator created

Option 2: Customized deployment of Doris Operator

After creating the CRD, there are two ways to deploy Doris Operator on the Kubernetes cluster: online and offline deployment.

The minimum requirements for deploying operator services are specified in the operator.yaml file. In order to adapt to complex production environments, you can download the operator.yaml file and update the configuration as desired.

Install Doris Operator online

After modifying the operator.yaml file, you can deploy the Doris Operator service using the following command:

kubectl apply -f ./operator.yaml

The following is the expected output:

namespace/doris created
role.rbac.authorization.k8s.io/leader-election-role created
rolebinding.rbac.authorization.k8s.io/leader-election-rolebinding created
clusterrole.rbac.authorization.k8s.io/doris-operator created
clusterrolebinding.rbac.authorization.k8s.io/doris-operator-rolebinding created
serviceaccount/doris-operator created
deployment.apps/doris-operator created

Offline installation of Doris Operator

1. Download the image file required to run the operator

If the server is not connected to the external network, you need to download the corresponding operator image file first. Doris Operator uses the following images:

selectdb/doris.k8s-operator:latest

Run the following command on a server that can connect to the external network to download the image:

## download doris operator image
docker pull selectdb/doris.k8s-operator:latest
## save the doris operator image as a tar package
docker save -o doris.k8s-operator-latest.tar selectdb/doris.k8s-operator:latest

Place the packaged tar file into all Kubernetes nodes and run the following command to upload the image:

docker load -i doris.k8s-operator-latest.tar

1. Configure Doris Operator

After downloading the operator.yaml file, you can modify the template according to your production environment expectations.

Doris Operator is a stateless Deployment in the Kubernetes cluster. Items such as limits, replica, label, namespace and other items can be modified according to needs. If you need to specify a certain version of the doirs operator image, you can make the following modifications to the operator.yaml file after uploading the image:

...
containers:
  - command:
      - /dorisoperator
    args:
      - --leader-elect
    image: selectdb/doris.k8s-operator:v1.0.0
    name: dorisoperator
    securityContext:
      allowPrivilegeEscalation: false
      capabilities:
        drop:
          - "ALL"
  ...

1. Install Doris Operator

After modifying the Doris Operator template, you can use the apply command to deploy the Operator:

kubectl apply -f ./operator.yaml

The following is the expected output:

namespace/doris created
role.rbac.authorization.k8s.io/leader-election-role created
rolebinding.rbac.authorization.k8s.io/leader-election-rolebinding created
clusterrole.rbac.authorization.k8s.io/doris-operator created
clusterrolebinding.rbac.authorization.k8s.io/doris-operator-rolebinding created
serviceaccount/doris-operator created
deployment.apps/doris-operator created

Option 3: Helm deploys Doris Operator

Helm Chart is an encapsulation of a series of YAML files that describe Kubernetes-related resources. When deploying an application through Helm, you can customize the application’s metadata to facilitate application distribution. Chart is a Helm package in TAR format for deploying Kubernetes native applications. Helm Chart can simplify the process of deploying Doris clusters.

1. Add a deployment warehouse

Add warehouse online

Add the remote repository through the repo add command

helm repo add doris-repo https://charts.selectdb.com

Update the latest version of the chart through the repo update command

helm repo update doris-repo

1. Install Doris Operator

Doris Operator can be installed in the doris namespace using the default configuration through the helm install command.

helm install operator doris-repo/doris-operator

If you need to customize the assembly values.yaml, you can refer to the following command:

helm install -f values.yaml operator doris-repo/doris-operator

Check the deployment status of Pods through the kubectl get pods command. When the Doris Operator’s Pod is in the Running state and all containers in the Pod are ready, the deployment is successful.

kubectl get pod --namespace doris

The return result is as follows:

NAME                              READY   STATUS    RESTARTS   AGE
doris-operator-866bd449bb-zl5mr   1/1     Running   0          18m

Add warehouse offline

If the server cannot connect to the external network, you need to download the chart resources of Doris Operator and Doris Cluster in advance.

1. Download offline chart resources

Download doris-operator-{chart_version}.tgz to install Doris Operator chart. If you need to download version 1.4.0 of Doris Operator, you can use the following command:

wget https://charts.selectdb.com/doris-operator-1.4.0.tgz

1. Install Doris Operator

Doris Operator can be installed through the helm install command.

helm install operator doris-operator-1.4.0.tgz

If you need to customize the assembly values.yaml, you can refer to the following command:

helm install -f values.yaml operator doris-operator-1.4.0.tgz

Check the deployment status of Pods through the kubectl get pods command. When the Doris Operator’s Pod is in the Running state and all containers in the Pod are ready, the deployment is successful.

kubectl get pod --namespace doris

The return result is as follows:

NAME                              READY   STATUS    RESTARTS   AGE
doris-operator-866bd449bb-zl5mr   1/1     Running   0          18m

Check service status

After deploying the Operator service, you can check the service status through the following command.

kubectl get pod -n doris

The return result is as follows:

NAME                              READY   STATUS    RESTARTS   AGE
doris-operator-6f47594455-p5tp7   1/1     Running   0          11s

You need to ensure that the STATUS status is Running and the status of all containers in the pod is Ready.