Tekton实践篇-Tekton和Argocd的梦幻联动

开发 架构
在今天的文章中,我们就会将CI和CD进行分开,让Tekton专注于CI,CD则交给Argocd。

前面的一系列文章基本已经把Tekton相关的知识介绍完了,如果你认真的看完并且实践过,相信你对Tekton已经有一定的掌握了。

在实际的工作中,Tekton可以完成CICD的所有工作,并没有强制的将它划分为CI工具或者CD工具。在今天的文章中,我们就会将CI和CD进行分开,让Tekton专注于CI,CD则交给Argocd。

要使用Tekton+Argocd模式,只需要把我们之前deploy的task变成由Argocd完成即可。而原先的deploy的task改成更改镜像信息并推送到Gitlab。

所以整体步骤变成如下:

  • 拉代码
  • 编译构建,构建镜像并推送
  • 更改helm chart的value.yaml中的镜像信息,推送到仓库
  • argocd监控到chart仓库变化,更新应用

前提:自己部署好Argocd,如果对Argocd不熟悉可以到官网(https://argo-cd.readthedocs.io/en/stable/)进行学习,也可以在《运维开发故事》公众号搜索Argocd相关文章进行学习。

将Helm Chart保存到Gitlab

因为Argocd是基于GitOps的实现,所以用它来部署应用也是基于Git。

创建一个devops-helm-chart的仓库,如下:

让后将具体的Helm Chart推送到仓库。

在Argocd上部署应用

(1)添加仓库

(2)部署应用

改造Tekton Pipeline上面已经把基本需要的东西准备好了,下面就开始真正的改造了。

创建更改Helm Chart的Task

顾名思义,Argocd是基于Git来进行应用的生命周期管理,所以我们的应用变更最好也是基于Git,这样整个流程是可追溯的。

apiVersion: tekton.dev/v1alpha1
kind: Task
metadata:
name: deploy-to-gitlab
spec:
workspaces:
- name: source
- name: kubernetesconfig
mountPath: /root/.kube
params:
- name: IMAGE
- name: TAG
- name: GIT_USERNAME
- name: GIT_PASSWORD
- name: CHART_GITLAB_URL
- name: GIT_NAME
default: joker
- name: GIT_EMAIL
default: coolops@163.com
- name: CHART_DIR
steps:
- name: run-change-helm-chart
image: registry.cn-hangzhou.aliyuncs.com/coolops/helm-kubectl-curl-git-jq-yq:latest
workingDir: $(workspaces.source.path)
script: |
git remote set-url origin http://$(params.GIT_USERNAME):$(params.GIT_PASSWORD)@$(params.CHART_GITLAB_URL)
git config --global user.name "$(params.GIT_NAME)"
git config --global user.email "$(params.GIT_EMAIL)"
git clone http://$(params.GIT_USERNAME):$(params.GIT_PASSWORD)@$(params.CHART_GITLAB_URL) /opt/devops-cd
cd /opt/devops-cd/$(params.CHART_DIR)
git pull
yq w --inplace values.yaml 'image.repository' "$(params.IMAGE)"
yq w --inplace values.yaml 'image.tag' "$(params.TAG)"
git commit -am 'image update'
git push

修改Tekton Pipeline

上面已经准备好了Task,下面就是对Pipeline进行改造,改造后如下:

apiVersion: tekton.dev/v1beta1
kind: Pipeline
metadata:
name: rd-argocd-pipeline
spec:
workspaces: # 声明 workspaces
- name: rd-repo-pvc
- name: docker-config
params:
# 定义代码仓库
- name: git_url
- name: revision
type: string
default: "master"
- name: gitInitImage
type: string
default: "registry.cn-hangzhou.aliyuncs.com/coolops/tekton-git-init:v0.29"
# 定义镜像参数
- name: pathToDockerfile
description: The path to the build context, used by Kaniko - within the workspace
default: .
- name: imageUrl
description: Url of image repository
- name: imageTag
description: Tag to apply to the built image
default: latest
- name: git_username
type: string
default: root
- name: git_password
type: string
- name: chart_gitlab_url
type: string
default: 192.168.205.130/root/devops-helm-chart.git
- name: git_name
type: string
default: joker
- name: git_email
type: string
default: coolops@163.com
- name: chart_dir
type: string
default: coolops-rd
- name: app_name
type: string
# 定义代码扫描
- name: sonar_username
type: string
default: admin
- name: sonar_password
type: string
default: admin
- name: sonar_url
type: string
tasks: # 添加task到流水线中
- name: clone
taskRef:
name: git-clone
workspaces:
- name: output
workspace: rd-repo-pvc
params:
- name: url
value: $(params.git_url)
- name: revision
value: $(params.revision)
- name: gitInitImage
value: $(params.gitInitImage)
- name: unit-test
workspaces: # 传递 workspaces
- name: source
workspace: rd-repo-pvc
taskRef:
name: unit-test
runAfter:
- clone
- name: build-push-image
params:
- name: pathToDockerfile
value: $(params.pathToDockerfile)
- name: imageUrl
value: $(params.imageUrl)
- name: imageTag
value: $(tasks.clone.results.commit)
taskRef:
name: build-push-image
runAfter:
- unit-test
workspaces: # 传递 workspaces
- name: source
workspace: rd-repo-pvc
- name: dockerconfig
workspace: docker-config
- name: deploy-to-gitlab
taskRef:
name: deploy-to-gitlab
params:
- name: IMAGE
value: $(params.imageUrl)
- name: TAG
value: $(tasks.clone.results.commit)
- name: GIT_USERNAME
value: $(params.git_username)
- name: GIT_PASSWORD
value: $(params.git_password)
- name: CHART_GITLAB_URL
value: $(params.chart_gitlab_url)
- name: GIT_NAME
value: $(params.git_name)
- name: GIT_EMAIL
value: $(params.git_email)
- name: CHART_DIR
value: $(params.chart_dir)
workspaces:
- name: source
workspace: rd-repo-pvc
runAfter:
- build-push-image
- name: sonar-scanner
when:
- input: $(params.revision)
operator: in
values:
- test
taskRef:
name: sonar-scanner
params:
- name: SONAR_USERNAME
value: $(params.sonar_username)
- name: SONAR_PASSWORD
value: $(params.sonar_password)
- name: SONAR_URL
value: $(params.sonar_url)
- name: APP_NAME
value: $(params.app_name)
workspaces:
- name: source
workspace: rd-repo-pvc

修改PipelineRun

上面已经把Pipeline准备好了,下面就i创建一个PipelineRun进行测试。

apiVersion: tekton.dev/v1beta1
kind: PipelineRun
metadata:
name: devops-hello-world-pipeline-run
spec:
pipelineRef:
name: rd-argocd-pipeline
params:
- name: revision
value: test
- name: git_url
value: http://192.168.205.130/root/devops-hello-world.git
- name: imageUrl
value: registry.cn-hangzhou.aliyuncs.com/coolops/devops-hello-world
- name: imageTag
value: latest
- name: pathToDockerfile
value: Dockerfile
- name: git_password
value: Joker@123456
- name: app_name
value: devops-hello-world
- name: sonar_username
value: admin
- name: sonar_password
value: Joker@123456
- name: sonar_url
value: http://sonarqube.coolops.cn
workspaces:
- name: rd-repo-pvc
volumeClaimTemplate:
spec:
accessModes:
- ReadWriteOnce
storageClassName: local
resources:
requests:
storage: 1Gi
- name: docker-config
secret:
secretName: docker-config
serviceAccountName: tekton-build-sa

然后在Tekton Dashboard上看到运行完成,如下:

Chart仓库中的value.yaml也进行了对应的更改,如下:

Argocd也对应用进行了对应的更新,如下:

到此整个流水线的拆分以及使用就完成了。

最后

到这里,Tekton系列文章基本告一段落了,整个系列耗时将近2个月,从最基础的安装,再慢慢到理论知识,以及最后的不同实践,不知道你掌握了多少?

分享是另一种学习,也是我比较推崇的一种学习方式,毕竟自己学和写出来还是有不少的距离,从学习到分享,可以不断的加深对知识的印象,也能很好的整理自己的知识体系,当然也希望对大家有所帮助。

责任编辑:姜华 来源: 运维开发故事
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