Camunda

• 安装建模器：https://camunda.com/download/modeler/

• 使用 Helm 部署 Camunda 平台之前，您需要以下内容:

1.* Kubernetes 集群：本地、云平台或本地。 Minikube文档

安装minikube
curl -LO https://storage.googleapis.com/minikube/releases/latest/minikube-darwin-amd64
sudo install minikube-darwin-amd64 /usr/local/bin/minikube

wudy.yu@promote ~ % curl -LO https://storage.googleapis.com/minikube/releases/latest/minikube-darwin-amd64
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100 71.8M  100 71.8M    0     0  3231k      0  0:00:22  0:00:22 --:--:-- 3084k
wudy.yu@promote ~ % sudo install minikube-darwin-amd64 /usr/local/bin/minikube
Password:

启动集群 minikube start

wudy.yu@promote ~ % kubectl get po -A            
NAMESPACE     NAME                               READY   STATUS    RESTARTS      AGE
kube-system   coredns-565d847f94-cn4qx           1/1     Running   0             35m
kube-system   etcd-minikube                      1/1     Running   0             35m
kube-system   kube-apiserver-minikube            1/1     Running   0             35m
kube-system   kube-controller-manager-minikube   1/1     Running   0             35m
kube-system   kube-proxy-fmbh7                   1/1     Running   0             35m
kube-system   kube-scheduler-minikube            1/1     Running   0             35m
kube-system   storage-provisioner                1/1     Running   1 (35m ago)   35m

minikube 开启dashboard minikube dashboard

创建一个部署并在端口80上公开

wudy.yu@promote ~ % kubectl create deployment  nginx-wudy --image=docker.io/nginx:1.23
deployment.apps/nginx-wudy created
wudy.yu@promote ~ % kubectl expose deployment nginx-wudy --type=NodePort --port=80
service/nginx-wudy exposed

minikube启动浏览器

wudy.yu@promote ~ % kubectl get services nginx-wudy
NAME         TYPE       CLUSTER-IP      EXTERNAL-IP   PORT(S)        AGE
nginx-wudy   NodePort   10.101.84.180   <none>        80:32213/TCP   2m43s
wudy.yu@promote ~ % minikube service nginx-wudy
╭──────────────────────────────────────────────────────────────────────────────────────────────────────────╮
│                                                                                                          │
│    You are trying to run the amd64 binary on an M1 system.                                               │
│    Please consider running the darwin/arm64 binary instead.                                              │
│    Download at https://github.com/kubernetes/minikube/releases/download/v1.27.1/minikube-darwin-arm64    │
│                                                                                                          │
╰──────────────────────────────────────────────────────────────────────────────────────────────────────────╯
|-----------|------------|-------------|---------------------------|
| NAMESPACE |    NAME    | TARGET PORT |            URL            |
|-----------|------------|-------------|---------------------------|
| default   | nginx-wudy |          80 | http://192.168.49.2:32213 |
|-----------|------------|-------------|---------------------------|
🏃  Starting tunnel for service nginx-wudy.
|-----------|------------|-------------|------------------------|
| NAMESPACE |    NAME    | TARGET PORT |          URL           |
|-----------|------------|-------------|------------------------|
| default   | nginx-wudy |             | http://127.0.0.1:64845 |
|-----------|------------|-------------|------------------------|
🎉  正通过默认浏览器打开服务 default/nginx-wudy...

或者使用kubectl转发端口 kubectl port-forward service/hello-minikube 7080:80
访问：http://localhost:7080/

2.* Helm二进制文件。

brew install helm

3.* Kubectl二进制文件。

brew install kubectl

• 添加 Camunda Helm

您必须添加 Camunda Helm 图表存储库才能使用图表。完成此操作后，Helm 能够获取并安装托管在https://helm.camunda.io中的图表

wudy.yu@promote ~ % helm repo add camunda https://helm.camunda.io
"camunda" has been added to your repositories
wudy.yu@promote ~ % helm  repo update
Hang tight while we grab the latest from your chart repositories...
...Successfully got an update from the "camunda" chart repository
Update Complete. ⎈Happy Helming!⎈

• 安装 Camunda Helm

创建、查看命名空间

wudy.yu@promote ~ % kubectl create  namespace  camunda                    
namespace/camunda created
wudy.yu@promote ~ % kubectl get ns
NAME                   STATUS   AGE
camunda                Active   12s
default                Active   93m
kube-node-lease        Active   93m
kube-public            Active   93m
kube-system            Active   93m
kubernetes-dashboard   Active   53m

在 Kubernetes 集群中安装可用的 Camunda Platform 8 组件

wudy.yu@promote ~ % helm install camunda-wudy -n camunda  camunda/camunda-platform
NAME: camunda-wudy
LAST DEPLOYED: Sun Oct 23 12:34:47 2022
NAMESPACE: camunda
STATUS: deployed
REVISION: 1
NOTES:
# (camunda-platform - 8.0.14)
   ___   _   __  __ _   _ _  _ ___   _     ___ _      _ _____ ___ ___  ___ __  __ 
  / __| /_\ |  \/  | | | | \| |   \ /_\   | _ \ |    /_\_   _| __/ _ \| _ \  \/  |
 | (__ / _ \| |\/| | |_| | .` | |) / _ \  |  _/ |__ / _ \| | | _| (_) |   / |\/| |
  \___/_/ \_\_|  |_|\___/|_|\_|___/_/ \_\ |_| |____/_/ \_\_| |_| \___/|_|_\_|  |_|
                                                                                 

## Installed Services:

- Zeebe:
  - Enabled: true
  - Docker Image used for Zeebe: camunda/zeebe:8.0.0
  - Zeebe Cluster Name: "camunda-wudy-zeebe"
  - Prometheus ServiceMonitor Enabled: false
- Operate:
  - Enabled: true
  - Docker Image used for Operate: camunda/operate:8.0.0
- Tasklist:
  - Enabled: true
  - Docker Image used for Tasklist: camunda/tasklist:8.0.0
- Optimize:
  - Enabled: true
  - Docker Image used for Optimize: camunda/optimize:3.9.0-preview-2
- Identity:
  - Enabled: true
  - Docker Image used for Identity: camunda/identity:8.0.0
  - Keycloak: bitnami/keycloak:16.1.1-debian-10-r52
- Elasticsearch:
  - Enabled: true
  - ElasticSearch URL: http://elasticsearch-master:9200

### Zeebe

The Cluster itself is not exposed as a service that means that you can use `kubectl port-forward` to access the Zeebe cluster from outside Kubernetes:

> kubectl port-forward svc/camunda-wudy-zeebe-gateway 26500:26500 -n camunda

Now you can connect your workers and clients to `localhost:26500`

### Connecting to Web apps

As part of the Helm charts an ingress definition can be deployed, but you require to have an Ingress Controller for that Ingress to be Exposed.
In order to deploy the ingress manifest, set `<service>.ingress.enabled` to `true`. Example: `operate.ingress.enabled=true`

If you don't have an ingress controller you can use `kubectl port-forward` to access the deployed web application from outside the cluster:

Identity: kubectl port-forward svc/camunda-wudy-identity 8080:80
Operate:  kubectl port-forward svc/camunda-wudy-operate  8081:80
Tasklist: kubectl port-forward svc/camunda-wudy-tasklist 8082:80
Optimize: kubectl port-forward svc/camunda-wudy-optimize 8083:80

If you want to use different ports for the services, please adjust the related configs in the values file since these ports are used as redirect URL for Keycloak.

The authentication via Identity/Keycloak is enabled. In order to login into one of the services please port-forward to Keycloak
as well, otherwise a login will not be possible. Make sure you use `18080` as port.

> kubectl port-forward svc/camunda-wudy-keycloa 18080:80

Now you can point your browser to one of the service's login page. Example: http://localhost:8081 for Operate.

Default user and password: "demo/demo"
wudy.yu@promote ~ %