Kubesphere devops overview

KubeSphere DevOps Overview

Overview

KubeSphere DevOps provides CI/CD capabilities through Jenkins integration, supporting both graphical pipeline editing and Jenkinsfile-based pipelines. It enables automated builds, testing, and deployments across multi-cluster environments with ArgoCD integration for GitOps continuous deployment.

When to Use

• Setting up CI/CD pipelines in KubeSphere
• Configuring Jenkins integration
• Managing DevOps projects and pipelines
• Troubleshooting pipeline execution issues
• Integrating with GitHub, GitLab, or SVN repositories
• Configuring SonarQube for code quality

Core Concepts

Resource Mapping

KubeSphere DevOps maps resources across three layers:

KubeSphere          Kubernetes                    Jenkins
─────────────────────────────────────────────────────────────
Workspace           Workspace CR                  (authorization)
└── DevOpsProject   ├── DevOpsProject CR          └── Folder
    (Namespace)     └── Namespace (with label)
    └── Pipeline    ├── Pipeline CR               └── WorkflowJob
        └── Run     ├── PipelineRun CR            └── Build #N

Key Concept: A "DevOps Project" in KubeSphere is fundamentally a Kubernetes namespace with the devops.kubesphere.io/managed=true label. The DevOpsProject CR exists as a wrapper resource, but when querying for accessible DevOps projects, you interact with namespaces, not the DevOpsProject CRs directly.

For tenants: Use the /kapis/devops.kubesphere.io/v1alpha3/workspaces/{workspace}/namespaces endpoint to list accessible DevOps projects (returns namespace resources). The /apis/devops.kubesphere.io/v1alpha3/devopsprojects endpoint requires cluster-scoped permissions and returns 403 for tenants.

DevOps Project Naming Convention

DevOps projects have two forms of names:

Name Type	Example	Source	Usage
Shortname	devopstest	.metadata.generateName in DevOpsProject CR	Display/user-friendly name
Fullname	devopstestc2nj7	.metadata.name in DevOpsProject CR and Namespace	Actual resource identifier

Important:

• The fullname is the actual Kubernetes namespace name (e.g., devopstestc2nj7)
• When creating a DevOps project with shortname devopstest, KubeSphere generates a unique fullname by appending random characters
• All API operations use the fullname (namespace name), not the shortname
• When a user refers to a project by shortname and multiple projects match, ask for confirmation before proceeding

Workspace Association

DevOpsProjects belong to a Workspace via label:

apiVersion: devops.kubesphere.io/v1alpha3
kind: DevOpsProject
metadata:
  name: my-project
  labels:
    kubesphere.io/workspace: demo   # Associates with Workspace 'demo'

To create and associate:

# 1. Create Workspace
kubectl apply -f - <<EOF
apiVersion: tenant.kubesphere.io/v1beta1
kind: Workspace
metadata:
  name: demo
EOF

# 2. Create DevOpsProject with label
kubectl apply -f - <<EOF
apiVersion: devops.kubesphere.io/v1alpha3
kind: DevOpsProject
metadata:
  name: my-project
  labels:
    kubesphere.io/workspace: demo
EOF

Project Components

┌──────────────────────────────────────────────────────────────┐
│                     DevOps Project                            │
│  (Namespace with devops.kubesphere.io/managed=true label)    │
└──────────────────────┬───────────────────────────────────────┘
                       │
        ┌──────────────┼──────────────┐
        │              │              │
┌───────▼──────┐ ┌─────▼─────┐ ┌──────▼──────┐
│  Pipelines   │ │Credentials│ │   Webhooks  │
│              │ │           │ │             │
│ - Graphical  │ │ - SSH     │ │ - GitHub    │
│ - Jenkinsfile│ │ - Basic   │ │ - GitLab    │
│ - Multi-branch│ │ - Token  │ │ - Generic   │
└──────────────┘ └───────────┘ └─────────────┘

Installation

Using InstallPlan (Recommended for Production)

Minimal Installation (Default Config) - RECOMMENDED:

apiVersion: kubesphere.io/v1alpha1
kind: InstallPlan
metadata:
  name: devops
  namespace: kubesphere-system
spec:
  extension:
    name: devops
    version: 1.2.4
  enabled: true
  upgradeStrategy: Manual   # Required for production
  # Note: spec.config is omitted to use extension default values

When to use minimal installation:

• First-time installation to test default configuration
• Standard deployments without special resource requirements
• When you want to use the extension's tested defaults

Custom Configuration (Only When Needed):

apiVersion: kubesphere.io/v1alpha1
kind: InstallPlan
metadata:
  name: devops
  namespace: kubesphere-system
spec:
  extension:
    name: devops
    version: 1.2.4
  enabled: true
  upgradeStrategy: Manual   # Required for production
  # config: leave empty to use default values

Custom Configuration (Override Defaults):

apiVersion: kubesphere.io/v1alpha1
kind: InstallPlan
metadata:
  name: devops
  namespace: kubesphere-system
spec:
  extension:
    name: devops
    version: 1.2.4
  enabled: true
  upgradeStrategy: Manual   # Required for production
  config: |
    # Overrides values from DevOps chart's values.yaml
    agent:
      jenkins:
        Master:
          NodeSelector: {}
          resources:
            requests:
              cpu: "500m"
              memory: "4Gi"
            limits:
              cpu: "2000m"
              memory: "8Gi"
        Agent:
          Image: "jenkins/inbound-agent"
          Tag: "3309.v27b_9314fd1a_4-1-jdk21"
          Privileged: false

Important:

• Always use upgradeStrategy: Manual for production
• config is optional - omit or leave empty to use extension defaults
• Config values override the extension's values.yaml settings
• DevOps is a critical infrastructure component - plan upgrades carefully

Multi-Cluster Installation

To install DevOps agent on member clusters, add clusterScheduling:

apiVersion: kubesphere.io/v1alpha1
kind: InstallPlan
metadata:
  name: devops
  namespace: kubesphere-system
spec:
  extension:
    name: devops
    version: 1.2.4
  enabled: true
  upgradeStrategy: Manual
  config: |
    # Base config for all clusters
    agent:
      jenkins:
        Master:
          resources:
            requests:
              cpu: "500m"
              memory: "4Gi"
  clusterScheduling:
    placement:
      clusters:
        - host      # Install on host cluster
        - member1   # Install on member1
        - member2   # Install on member2
    # Optional: per-cluster overrides
    overrides:
      member1: |
        agent:
          jenkins:
            Master:
              resources:
                limits:
                  memory: "8Gi"   # Larger master for member1
      member2: |
        agent:
          jenkins:
            Agent:
              NodeSelector:
                zone: west

Key Points:

• clusterScheduling.placement.clusters: List clusters where DevOps agent runs
• clusterScheduling.overrides: Cluster-specific config overrides
• Without clusterScheduling, DevOps only runs on the host cluster
• Overrides merge with base config, override values take precedence

Using Helm (Alternative)

helm upgrade --install devops kse-extensions/devops \
  -n kubesphere-devops-system \
  --create-namespace

Post-Installation Verification

Verify the DevOps installation:

# Check DevOps pods
kubectl get pods -n kubesphere-devops-system

# Check InstallPlan status
kubectl get installplan devops -n kubesphere-system

# For multi-cluster: check agent status on each cluster
kubectl get installplan devops -n kubesphere-system -o jsonpath='{.status.clusterSchedulingStatuses}'

Architecture

Component	Purpose	Namespace
devops-jenkins	Jenkins master	kubesphere-devops-system
devops-apiserver	DevOps API service	kubesphere-devops-system
devops-controller	Resource controllers	kubesphere-devops-system
devops-argocd-*	ArgoCD (GitOps)	argocd
Jenkins Agent	Pipeline executors	Dynamic (per pipeline)
-----------	---------	-----------
devops-jenkins	Jenkins master	kubesphere-devops-system
devops-apiserver	DevOps API service	kubesphere-devops-system
devops-controller	Resource controllers	kubesphere-devops-system
Jenkins Agent	Pipeline executors	Dynamic (per pipeline)

Jenkins Integration

KubeSphere DevOps integrates with Jenkins for CI/CD execution. The secret devops-jenkins contains the admin token for direct Jenkins access:

# Get Jenkins admin token
TOKEN=$(kubectl -n kubesphere-devops-system get secret devops-jenkins -o jsonpath='{.data.jenkins-admin-token}' | base64 -d)

# Access Jenkins API
kubectl run curl-jenkins --rm -i --restart=Never --image=curlimages/curl \
  -- "http://admin:${TOKEN}@devops-jenkins.kubesphere-devops-system:80/api/json"

Jenkins NodePort:

kubectl get svc devops-jenkins -n kubesphere-devops-system
# Default: 30180

Access Jenkins Console:

• URL: http://<node-ip>:30180
• Username: admin
• Password: Get from secret above

ArgoCD Integration

KubeSphere DevOps includes ArgoCD v2.11.7 for GitOps continuous deployment:

ArgoCD Components:

Component	Purpose
application-controller	Manages Application state
applicationset-controller	Manages ApplicationSet resources
dex-server	SSO authentication
notifications-controller	Event notifications
repo-server	Repository operations
argocd-server	API/UI server
redis	Cache layer

Access ArgoCD:

# Get ArgoCD server URL
kubectl get svc devops-agent-argocd-server -n argocd

# Get admin password
kubectl -n argocd get secret argocd-initial-admin-secret -o jsonpath='{.data.password}' | base64 -d

Key Features:

• Declarative GitOps deployment
• Multi-source application support
• Automated sync policies
• SSO integration via Dex
• Notification webhooks

Key Resources

Key Resources

Resource	API Version	Purpose
Pipeline	devops.kubesphere.io/v1alpha3	CI/CD pipeline definition
DevOpsProject	devops.kubesphere.io/v1alpha3	DevOps project (namespace wrapper)
Credential	v1/Secret	Repository and deployment credentials

Quick Commands

# List DevOps projects
kubectl get devopsprojects

# List pipelines in a project
kubectl get pipelines -n <devops-project-namespace>

# Get pipeline runs
kubectl get pipelineruns -n <devops-project-namespace>

# Check Jenkins status
kubectl -n kubesphere-devops-system get pods -l app=devops-jenkins

# View Jenkins logs
kubectl -n kubesphere-devops-system logs -l app=devops-jenkins

# Get Jenkins admin password
kubectl -n kubesphere-devops-system get secret devops-jenkins -o jsonpath='{.data.jenkins-admin-password}' | base64 -d

Pipeline Types

Type	Description	Use Case
Graphical	Visual pipeline editor	Simple pipelines, no code
Jenkinsfile (SCM)	Pipeline defined in repository	Version-controlled pipelines
Jenkinsfile (Inline)	Pipeline defined in KubeSphere	Quick testing
Multi-branch	Auto-discovers branches	GitFlow, feature branches

Common Mistakes

Mistake	Fix
Pipeline fails with "No agent"	Check Jenkins agent configuration
Cannot access Git repository	Verify credentials and webhook setup
kubeconfig credentials fail	Use string type instead of kubeconfigContent (v1.2+)
Jenkins out of memory	Increase Jenkins master resources
Pipeline hangs	Check agent pod status and resource limits

Version Compatibility

DevOps	Jenkins	Notes
v1.2.x	2.504.1 LTS	kubernetes-cd plugin removed
v1.1.x	2.346.3 LTS	Legacy kubeconfigContent supported

References

• DevOps Documentation
• Pipeline Syntax
• Extension README