[K8S] Setup Devtron with K3D

Context

With K3D, it’s not trivial for a beginner to work on it. I ran into Devtron accidentally and find that it’s relatively simple to use with an interesting Web GUI. The installation is pretty neat and quick.

Install Helm

A handy script from the official site of helm could help you:

1
2
3
$ curl -fsSL -o get_helm.sh https://raw.githubusercontent.com/helm/helm/main/scripts/get-helm-3
$ chmod 700 get_helm.sh
$ ./get_helm.sh

Please be careful and check the shell script before execution.
For more os-specific installation methods, please check https://helm.sh/docs/intro/install/

Install Devtron

installation with helm

1
helm install devtron devtron/devtron-operator --create-namespace --namespace devtroncd --set components.devtron.service.type=NodePort --set components.devtron.service.nodePort=30080

Run the following command to get the admin password

1
kubectl -n devtroncd get secret devtron-secret -o jsonpath='{.data.ADMIN_PASSWORD}' | base64 -d

Run the following command to get the dashboard URL for the service type – LoadBalancer

1
kubectl get svc -n devtroncd devtron-service -o jsonpath='{.status.loadBalancer.ingress}'

Use this command - $ kubectl edit svc devtron-service -n devtroncd to edit the service and change the service type to NodePort and NodePort port number to 30080 which you assigned while creating the cluster.

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
# Please edit the object below. Lines beginning with a '#' will be ignored,
# and an empty file will abort the edit. If an error occurs while saving this file will be
# reopened with the relevant failures.
#
apiVersion: v1
kind: Service
metadata:
  annotations:
    helm.sh/resource-policy: keep
    meta.helm.sh/release-name: devtron
    meta.helm.sh/release-namespace: devtroncd
  creationTimestamp: "2022-12-31T00:19:47Z"
  finalizers:
  - svccontroller.k3s.cattle.io/daemonset
  labels:
    app: devtron
    app.kubernetes.io/managed-by: Helm
    release: devtron
  name: devtron-service
  namespace: devtroncd
  resourceVersion: "811"
  uid: b4e4f754-26c6-4f3b-afa0-651c1e3ed997
spec:
  allocateLoadBalancerNodePorts: true
  clusterIP: 10.43.203.52
  clusterIPs:
  - 10.43.203.52
  externalTrafficPolicy: Cluster
  internalTrafficPolicy: Cluster
  ipFamilies:
  - IPv4
  ipFamilyPolicy: SingleStack
  ports:
  - name: devtron
		nodePort: 32267  # change it to -> 30080 or the port you choose for devtron when creating the cluster 
    port: 80
    protocol: TCP
    targetPort: devtron
  selector:
    app: devtron
  sessionAffinity: None
  type: LoadBalancer # Change this to -> NodePort so that it expose directly to load balancer of k3d
		status:
		  loadBalancer:
		    ingress:
		    - ip: 172.31.0.2
		    - ip: 172.31.0.3
		    - ip: 172.31.0.4

Then following the hint to get your admin password with

1
kubectl -n devtroncd get secret devtron-secret -o jsonpath='{.data.ADMIN_PASSWORD}' | base64 -d

And you will be fine to visit http://localhost:{THE_PORT_YOU_CHOSE_FOR_MAPPING_30080}.
If you used the same as the previous article, the URL will be http://localhost:8082

References

https://devtron.ai/blog/k3d-for-local-kubernetes-development/