devops dev guides

Signed-off-by: runzexia <runzexia@yunify.com>

docs/en/concepts-and-designs/README.md

@@ -36,7 +36,7 @@ TODO
 
 ### KubeSphere DevOps 
 
-TODO(@runzexia)
+Read [DevOps Pipeline Overview](devops-pipeline-overview.md).
 
 ### KubeSphere S2I/B2I 
 

docs/en/concepts-and-designs/devops-pipeline-overview.md

@@ -0,0 +1,68 @@
+# DevOps Pipeline Overview
+
+KubeSphere Pipeline DevOps aims to complex CI / CD requirements on Kubernetes.
+
+With the KubeSphere DevOps Pipeline, you can complete the construction of the CI / CD process by interacting with the KubeSphere console.
+
+
+## DevOps Pipeline Capabilities
+
+* Multi-tenant isolation
+* Build, Deploy, Launch things in kubernetes 
+* Use kubernetes dynamic agent to release the ability of kubernetes to dynamically expand
+* In SCM Pipeline and Out of SCM Pipeline 
+* Easy-to-use pipeline graphical editing
+
+
+### DevOps Pipeline API
+
+The KubeSphere DevOps Pipeline API will encapsulate the following APIs (Jenkins Core API / Jenkins BlueOcean API / Sonarqube API / Other Plugins API) to provide a standardized REST API.
+
+KubeSphere apiserver will provide multi-tenant API, pipeline API, credential API, code quality analysis API, etc.
+
+![ks-devops-api](../../images/devops-api.png)
+
+
+### Multi-tenant isolation
+
+In the current version (v2.1.0), multi-tenancy in the DevOps part is done with the ability of the [role-strategy-plugin](https://github.com/jenkinsci/role-strategy-plugin) plugin. KubeSphere will automatically synchronize permission rules in this plugin.
+
+In the future, kubesphere devops will authentication based on [OPA](https://www.openpolicyagent.org/).
+
+### Integration with Jenkins
+
+KubeSphere integrates with standard Jenkins, customizing plugins and configurations.
+
+#### Distribution of plugins
+
+To meet the needs of users in private cloud environments, KubeSphere uses the built-in nginx as a jenkins update center. The jenkins update center is provided as a Docker image + [Helm Chart](https://github.com/kubesphere/ks-installer/tree/master/roles/ks-devops/jenkins-update-center).
+
+#### Jenkins configuration
+
+KubeSphere uses Docker Image + Jenkins update Center + Helm Chart to distribute Jenkins。
+
+The list of plugins and configuration required by Jenkins will be provided by [Helm Chart](https://github.com/kubesphere/ks-installer/tree/master/roles/ks-devops/jenkins).
+
+We use [Groovy Script](https://wiki.jenkins.io/display/JENKINS/Groovy+Hook+Script) and [JCasC](https://github.com/jenkinsci/configuration-as-code-plugin) to initialize Jenkins.
+
+
+### Pipeline Builder Image And Jenkins PodTemplate
+
+Jenkins does not include any agent configuration by default, KubeSphere will provide some default agents (including docker image and podTemplate configuration).
+
+The default agent image will be built based on the [builder base](https://github.com/kubesphere/builder-base), you can search `builder xxx` repositories in kubesphere github.
+
+### In SCM Pipeline and Out of SCM Pipeline 
+
+KubeSphere's pipeline syntax will be fully compatible with Jenkins' pipeline syntax. Jenkinsfile found in SCM will be supported with Jenkins plugin.
+
+We will provide a plug-in SCM API, allowing users to graphically edit Jenkinsfile, Dockerfile and other configurations in SCM on KubeSphere.
+
+### Sonarqube integration
+
+KubeSphere will retrieve Jenkins pipelines that have performed Sonarqube code analysis. And provide API to access analysis report.
+
+
+### More
+
+If you have more questions, you can create an issue on [github](https://github.com/kubesphere/kubesphere)

docs/en/guides/README.md

@@ -56,7 +56,9 @@ TODO(@magicsong)
 
 ### KubeSphere DevOps developer
 
-TODO(@runzexia)
+Users who are interested in DevOps Pipeline, you can read the documentation according to the [guidelines above](README.md#for-code-developer).
+
+The function of KubeSphere DevOps is mainly provided by KubeSphere apiserver.
 
 ### KubeSphere S2I/B2I developer