tekton task入门

什么是task

A Task is a collection of Steps that you define and arrange in a specific order of execution as part of your continuous integration flow. A Task executes as a Pod on your Kubernetes cluster. A Task is available within a specific namespace, while a ClusterTask is available across the entire cluster.

任务是步骤的集合，作为持续集成流的一部分，您可以按照特定的执行顺序定义和安排这些步骤。Task作为一个Pod在Kubernetes集群上执行。Task在特定的名称空间中可用，而ClusterTask在整个集群中可用。

A Task declaration includes the following elements:

Parameters
Resources
Steps
Workspaces
Results

资源详解

steps

name

task/steps/task-name.yaml

apiVersion: tekton.dev/v1beta1
kind: Task
metadata:name: hello
spec:steps:- name: helloimage: ubuntucommand:- echoargs:- "Hello World!"

tkn task start -f task-name.yaml -n tekton

image

task/steps/task-name.yaml

apiVersion: tekton.dev/v1beta1
kind: Task
metadata:name: hello
spec:steps:- name: helloimage: ubuntucommand:- echoargs:- "Hello World!"

tkn task start -f task-name.yaml -n tekton

script

task/steps/task-script-shell.yaml

apiVersion: tekton.dev/v1beta1
kind: Task
metadata:name: script
spec:steps:- image: ubuntu script: |#!/usr/bin/env bashecho "Hello from Bash!"

task/steps/task-script-python.yaml

apiVersion: tekton.dev/v1beta1
kind: Task
metadata:name: script
spec:steps:- image: python  # contains pythonscript: |#!/usr/bin/env python3print("Hello from Python!")

task/steps/task-script-node.yaml

apiVersion: tekton.dev/v1beta1
kind: Task
metadata:name: script
spec:steps:- image: node  # contains nodescript: |#!/usr/bin/env nodeconsole.log("Hello from Node!")

resources

task/steps/task-resources.yaml

apiVersion: tekton.dev/v1beta1
kind: Task
metadata:name: resources
spec:steps:- name: step-with-limtsimage: ubuntucommand:- echoargs:- "Hello World!"resources:requests:memory: 100Micpu: 10mlimits:memory: 100Micpu: 10m

timeout

task/steps/task-timeout.yaml

apiVersion: tekton.dev/v1beta1
kind: Task
metadata:name: timeout
spec:  steps:- name: sleep-then-timeoutimage: ubuntuscript: | #!/usr/bin/env bashecho "I am supposed to sleep for 60 seconds!"sleep 60timeout: 5s

args

参数

task/steps/task-name.yaml

apiVersion: tekton.dev/v1beta1
kind: Task
metadata:name: hello
spec:steps:- name: helloimage: ubuntucommand:- echoargs:- "Hello World!"

command

命令

task/steps/task-name.yaml

apiVersion: tekton.dev/v1beta1
kind: Task
metadata:name: hello
spec:steps:- name: helloimage: ubuntucommand:- echoargs:- "Hello World!"

env

plain

task/steps/task-env.yaml

apiVersion: tekton.dev/v1beta1
kind: Task
metadata:name: env
spec: steps:- image: ubuntucommand: [echo]args: ["FOO is $(FOO)"]env:- name: "FOO"value: "baz"

secret-env

secret.yaml

apiVersion: v1
kind: Secret
metadata:name: mysecret
type: Opaque
data:username: YWRtaW4=

task/steps/task-env-secret.yaml

apiVersion: tekton.dev/v1beta1
kind: Task
metadata:name: env
spec:  steps:- image: ubuntucommand: [echo]args: ["FOO is $(FOO)"]env:- name: "FOO"valueFrom:secretKeyRef:name: mysecretkey: username

volumeMounts

挂载

task/steps/task-volumeMounts.yaml

apiVersion: tekton.dev/v1beta1
kind: Task
metadata:name: volumemounts
spec:   steps:- image: docker:20.10.5name: clientscript: |#!/usr/bin/env shcat > Dockerfile << EOFFROM ubuntuRUN apt-get updateENTRYPOINT ["echo", "hello"]EOFdocker build -t hello . && docker run hellodocker imagesvolumeMounts:- mountPath: /var/run/docker.sockname: docker-socketvolumes:- name: docker-sockethostPath:path: /var/run/docker.socktype: Socket

workingDir

工作目录

task/steps/task-workingDir.yaml

apiVersion: tekton.dev/v1beta1
kind: Task
metadata:name: workingdir
spec:  steps:- image: ubuntucommand: [pwd]workingDir: /workspace/src/

securityContext

上下文

task/steps/task-securityContext.yaml

apiVersion: tekton.dev/v1beta1
kind: Task
metadata:name: securitycontext
spec:  steps:- image: ubuntucommand: [id]securityContext:runAsUser: 2000

imagePullPolicy

拉取镜像方式

task/steps/task-imagePullPolicy .yaml

apiVersion: tekton.dev/v1beta1
kind: Task
metadata:name: imagepullpolicy
spec:  steps:- image: ubuntucommand: [echo]args:- helloimagePullPolicy: IfNotPresent

workspaces

description

描述

task/task-description.yaml

apiVersion: tekton.dev/v1beta1
kind: Task
metadata:name: description
spec: description:  this is a test tasksteps:- image: ubuntucommand: [echo]args:- helloimagePullPolicy: IfNotPresent