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版本:v1.8

Debugging Application

KubeVela supports several CLI commands for debugging your applications, they can work on control plane and help you access resources across multi-clusters. Which also means you can play with your pods in managed clusters directly on the hub cluster, without switching KubeConfig context. If you have multiple clusters in on application, the CLI command will ask you to choose one interactively.

List Apps

List all your applications.

vela ls
expected output
``` APP COMPONENT TYPE TRAITS PHASE HEALTHY STATUS CREATED-TIME war war java-war running healthy Ready:1/1 2022-09-30 17:32:29 +0800 CST ck-instance ck-instance clickhouse running healthy 2022-09-30 17:38:13 +0800 CST kubecon-demo hello-world java-war gateway running healthy Ready:1/1 2022-10-08 11:32:47 +0800 CST ck-app my-ck clickhouse gateway running healthy Host not specified, visit the cluster or load balancer in 2022-10-08 17:55:20 +0800 CST front of the cluster with IP: 47.251.8.82 demo2 catalog java-war workflowSuspending healthy Ready:1/1 2022-10-08 16:22:11 +0800 CST ├─ customer java-war workflowSuspending healthy Ready:1/1 2022-10-08 16:22:11 +0800 CST └─ order-web java-war gateway workflowSuspending healthy Ready:1/1 2022-10-08 16:22:11 +0800 CST kubecon-demo2 hello-world2 java-war gateway workflowSuspending healthy Ready:1/1 2022-10-08 11:48:41 +0800 CST ```

Show status of app

  • vela status can give you an overview of your deployed multi-cluster application.
vela up -f https://kubevela.net/example/applications/first-app.yaml
vela status first-vela-app
expected output
About:

Name: first-vela-app
Namespace: default
Created at: 2022-10-09 12:10:30 +0800 CST
Status: workflowSuspending

Workflow:

mode: StepByStep
finished: false
Suspend: true
Terminated: false
Steps
- id: g1jtl5unra
name: deploy2default
type: deploy
phase: succeeded
message:
- id: 6cq88ufzq5
name: manual-approval
type: suspend
phase: running
message:

Services:

- Name: express-server
Cluster: local Namespace: default
Type: webservice
Healthy Ready:1/1
Traits:
✅ scaler
  • vela status --pod can list the pod status of your application.
vela status first-vela-app --pod
expected output
CLUSTER COMPONENT       POD NAME                        NAMESPACE   PHASE   CREATE TIME             REVISION    HOST
local express-server express-server-b768d95b7-qnwb4 default Running 2022-10-09T04:10:31Z izrj9f9wodrsepwyb9mcetz
  • vela status --endpoint can list the access endpoints of your application.
vela status first-vela-app --endpoint
expected output
Please access first-vela-app from the following endpoints:
+---------+----------------+--------------------------------+-----------------------------+-------+
| CLUSTER | COMPONENT | REF(KIND/NAMESPACE/NAME) | ENDPOINT | INNER |
+---------+----------------+--------------------------------+-----------------------------+-------+
| local | express-server | Service/default/express-server | express-server.default:8000 | true |
+---------+----------------+--------------------------------+-----------------------------+-------+
  • vela status --tree --detail can list resources of your application.
vela status first-vela-app --tree --detail
expected output
CLUSTER       NAMESPACE     RESOURCE                  STATUS    APPLY_TIME          DETAIL
local ─── default ─┬─ Service/express-server updated 2022-10-09 12:10:30 Type: ClusterIP Cluster-IP: 10.43.212.235 External-IP: <none> Port(s): 8000/TCP Age: 6m44s
└─ Deployment/express-server updated 2022-10-09 12:10:30 Ready: 1/1 Up-to-date: 1 Available: 1 Age: 6m44s

Show logs of app

  • vela logs shows pod logs in managed clusters.
vela logs first-vela-app
expected output
+ express-server-b768d95b7-qnwb4 › express-server
express-server 2022-10-09T12:10:33.785549770+08:00 httpd started

Execute commands inside pod container

  • vela exec helps you execute commands in pods in managed clusters.
vela exec first-vela-app -it -- ls
expected output
bin   dev   etc   home  proc  root  sys   tmp   usr   var   www

Access port locally

  • vela port-forward can discover and forward ports of pods or services in managed clusters to your local endpoint.
vela port-forward first-vela-app 8001:8000

You can curl this app by curl http://127.0.0.1:8001/.

More CLI Details

Please refer to the CLI docs.