Tekton+Argo-cd+CloneSet

使用GitOps的思想来进行CICD。

file

安装tekton

官方文档:https://tekton.dev/docs/installation/, 注意k8s版本需要在1.28以上。

kubectl apply --filename https://storage.googleapis.com/tekton-releases/pipeline/latest/release.yaml
kubectl apply --filename \
https://storage.googleapis.com/tekton-releases/triggers/latest/release.yaml
kubectl apply --filename \
https://storage.googleapis.com/tekton-releases/triggers/latest/interceptors.yaml

apply之后会拉不下来镜像,这里使用Docker Playground来拉取。

首先创建实例,然后点击EDITOR

file

弹出来个页面,在里面粘贴镜像id,再点击SAVE。

file

当前目录下会生成一个名为root的文件。

file

回到命令行,登录dockerhub,拉取镜像并推送。

docker logout
docker login -u user
docker pull $(cat root)
docker images
docker tag && docker push

如果用latest版本可以直接使用我的镜像:

namespace: tekton-pipelines-resolvers
tekton-pipelines-remote-resolvers: wgh9626/tekton-pipeline-resolvers:latest

namespace: tekton-pipelines
tekton-events-controller: wgh9626/tekton-pipeline-events:latest
tekton-pipelines-controller: wgh9626/tekton-pipeline-controller:latest
tekton-pipelines-webhook: wgh9626/tekton-pipeline-webhook:latest
tekton-triggers-controller: wgh9626/tekton-triggers-controller:latest
tekton-triggers-webhook: wgh9626/tekton-triggers-webhook:latest
tekton-triggers-core-interceptors: wgh9626/tekton-triggers-core-interceptors:latest

file

安装dashboard

kubectl apply --filename https://storage.googleapis.com/tekton-releases/dashboard/latest/release.yaml
# 修改为NodePort
k edit svc -n tekton-pipelines tekton-dashboard 

file

安装Argo-cd

安装步骤参考:https://wghdr.top/?p=4402

file

开启TemplateNoDefaults

默认安装的OpenKruise会进行pod/pvc template的默认值注入,这个行为会跟argo-cd的sync判断逻辑冲突,所以在安装OpenKruise需要打开Gates TemplateNoDefaults

helm upgrade kruise openkruise/kruise --set featureGates="TemplateNoDefaults=true"
# or
helm upgrade kruise openkruise/kruise --set featureGates="AllAlpha=true"

file

配置Argo-cd CloneSet Health Check

Argo-cd根据该配置能够实现CloneSet自定义资源的检查,如CloneSet是否发布完成,以及Pod是否ready等。官方文档:https://argo-cd.readthedocs.io/en/stable/operator-manual/health/#custom-health-checks

具体做法就是创建一个ConfigMap,数据内容为对CloneSet的自定义健康检查lua脚本。

apiVersion: v1
kind: ConfigMap
metadata:
  labels:
    app.kubernetes.io/name: argocd-cm
    app.kubernetes.io/part-of: argocd
  name: argocd-cm
  namespace: argocd
data:
  resource.customizations.health.apps.kruise.io_CloneSet: |
    hs = {}
    -- if paused
    if obj.spec.updateStrategy.paused then
      hs.status = "Suspended"
      hs.message = "CloneSet is Suspended"
      return hs
    end

    -- check cloneSet status
    if obj.status ~= nil then
      if obj.status.observedGeneration < obj.metadata.generation then
        hs.status = "Progressing"
        hs.message = "Waiting for rollout to finish: observed cloneSet generation less then desired generation"
        return hs
      end

      if obj.status.updatedReplicas < obj.spec.replicas then
        hs.status = "Progressing"
        hs.message = "Waiting for rollout to finish: replicas hasn't finished updating..."
        return hs
      end

      if obj.status.updatedReadyReplicas < obj.status.updatedReplicas then
        hs.status = "Progressing"
        hs.message = "Waiting for rollout to finish: replicas hasn't finished updating..."
        return hs
      end

      hs.status = "Healthy"
      return hs
    end

    -- if status == nil
    hs.status = "Progressing"
    hs.message = "Waiting for cloneSet"
    return hs

脚本解释

  • 首先初始化,hs 是一个表,用来存储健康状态信息。hs.status: 表示健康状态,hs.message: 表示健康状态信息。
  • 如果 CloneSet 的更新策略被暂停(paused = true),返回Suspended状态和message信息。
  • 检查 CloneSet 的状态,如果status不为空,作进一步检查。
    1. 判断 observedGeneration 是否落后于期望值,如果小于表示 CloneSet 尚未完成最新配置的应用。返回Progressing状态和message信息。
    2. 如果更新的副本数(updatedReplicas)少于期望的副本数(replicas),表示更新尚未完成。返回Progressing状态和message信息。
    3. 如果已更新的就绪副本数(updatedReadyReplicas)少于更新的副本数(updatedReplicas),说明一些更新的副本尚未完全就绪。返回Progressing状态和message信息。
    4. 如果以上检查都通过,则认为 CloneSet 处于健康状态。返回Healthy状态。
  • 如果状态为空,表示 CloneSet 还未完全初始化。返回Progressing状态和message信息。
k apply -f health-check.yaml

file

创建流水线

创建docker registry密钥

用于docker push image。

k create secret docker-registry dockersecret --docker-server=docker.io --docker-username=user --docker-password=password --docker-email=123@qq.com
k get secrets dockersecret -o yaml

file

创建推送镜像task

使用官方的helloworld demo,包含了单元测试,Dockerfile和源码,helloworld的chart包。https://github.com/zmberg/samples/tree/hello_world/helloworld

apiVersion: tekton.dev/v1beta1
kind: Task
metadata:
  labels:
    app: helloworld
  name: helloworld-build-push
spec:
  stepTemplate:
    workingDir: /workspace
  params:
  - name: gitrepositoryurl
    type: string
  - name: branch
    type: string
  - name: docker_repo
    type: string
  - name: app_name
    type: string
  steps:
  # git clone
  - name: git-clone-and-checkout
    image: bitnami/git:latest
    command: ["sh", "-ce"]
    args:
    - >
      set -e

      echo $(params.gitrepositoryurl)

      git clone $(params.gitrepositoryurl) ./ && git checkout $(params.branch)
  # unit test
  - name: auto-test
    image: golang:1.16
    command: [ "sh", "-ce" ]
    args:
    - >
      set -e

      cp -R /workspace/$(params.app_name) /go/src/ && cd /go/src/$(params.app_name) && pwd;

      go test
  # docker build & push registry
  - name: push-to-registry
    image: wgh9626/kaniko-executor:latest
    args:
    - --dockerfile=Dockerfile
    - --destination=$(params.docker_repo):$(params.branch)
    - --context=./$(params.app_name)
    - --cache=true
    - --cache-dir=/cache
    - --use-new-run
    volumeMounts:
    - name: kaniko-secret
      mountPath: "/kaniko/.docker"
  volumes:
  # docker push secret
  - name: kaniko-secret
    secret:
      secretName: dockersecret
      items:
      - key: .dockerconfigjson
        path: config.json

创建argocd密钥

# 注意server不能加http://
k create secret generic argosecret --from-literal=username=admin --from-literal=password=sobVnyv8KLrlyBAa --from-literal=server=1.2.3.4:32519

file

创建argocd部署task

apiVersion: tekton.dev/v1beta1
kind: Task
metadata:
  labels:
    app: helloworld
  name: helloworld-argocd
spec:
  params:
  - name: gitrepositoryurl
    type: string
  - name: branch
    type: string
  - name: docker_repo
    type: string
  - name: app_name
    type: string
  - name: app_ns
    type: string
  - name: k8s_server
    type: string
  steps:
  - name: argocd-deploy
    image: wgh9626/argocd:latest
    command:
    - sh
    args:
    - '-ce'
    - >
      set -e

      echo "upgrade app $(params.app_name)"; username=`cat /var/secret/username`; password=`cat /var/secret/password`; server=`cat /var/secret/server`;

      argocd login ${server} --insecure --username ${username} --password ${password}

      argocd app create $(params.app_name) --upsert --repo $(params.gitrepositoryurl) --path $(params.app_name)/charts --dest-namespace $(params.app_ns) --dest-server $(params.k8s_server) --revision $(params.branch) --helm-set image.repository=$(params.docker_repo) --helm-set image.tag=$(params.branch) --helm-set installation.namespace=$(params.app_ns)

      argocd app list; argocd app sync $(params.app_name)

      argocd app wait $(params.app_name) --health
    volumeMounts:
    - name: argocd-secret
      mountPath: "/var/secret"
  volumes:
  - name: argocd-secret
    secret:
      secretName: argosecret

file

创建Pipeline

定义tekton pipeline,总共由上面两个task任务组成。并且执行完 构建-测试-推送镜像Task之后,再执行argocd部署。

apiVersion: tekton.dev/v1beta1
kind: Pipeline
metadata:
  name: helloworld-pipeline
spec:
  params:
  - name: gitrepositoryurl
    type: string
  - name: branch
    type: string
  - name: docker_repo
    type: string
  - name: app_name
    type: string
  - name: app_ns
    type: string
  - name: k8s_server
    type: string
  tasks:
  - name: helloworld-build-push
    taskRef:
      name: helloworld-build-push
    params:
    - name: gitrepositoryurl
      value: $(params.gitrepositoryurl)
    - name: branch
      value: $(params.branch)
    - name: docker_repo
      value: $(params.docker_repo)
    - name: app_name
      value: $(params.app_name)
  - name: helloworld-argocd
    taskRef:
      name: helloworld-argocd
    params:
    - name: gitrepositoryurl
      value: $(params.gitrepositoryurl)
    - name: branch
      value: $(params.branch)
    - name: docker_repo
      value: $(params.docker_repo)
    - name: app_name
      value: $(params.app_name)
    - name: app_ns
      value: $(params.app_ns)
    - name: k8s_server
      value: $(params.k8s_server)
    runAfter:
    - helloworld-build-push

file

执行Tekton Pipeline

我这里从gitHub转到gitee了,防止无法访问github。需要对应修改Git地址和分支。

apiVersion: tekton.dev/v1beta1
kind: PipelineRun
metadata:
  name: helloworld-pipeline-run-1
spec:
  pipelineRef:
    name: helloworld-pipeline
  params:
  - name: gitrepositoryurl
    value: https://gitee.com/wghdrr/samples.git
  - name: branch
    value: master
  - name: docker_repo
    value: wgh9626/kruise
  - name: app_name
    value: helloworld
  - name: app_ns
    value: helloworld
  - name: k8s_server
    value: https://kubernetes.default.svc

file

执行失败了,因为连不上docker.io...

file

手动下载镜像,然后修改Task的镜像拉取策略,可以看到默认是Always,修改为IfNotPresent或Never。https://tekton.dev/docs/pipelines/pipeline-api/

file

再次执行pipiline。还是失败的,仍然连接了docker.io,把镜像换成阿里云。

registry.cn-hangzhou.aliyuncs.com/wgh9626/git:latest
registry.cn-hangzhou.aliyuncs.com/wgh9626/golang:1.16
registry.cn-hangzhou.aliyuncs.com/wgh9626/kaniko-executor:latest
# 修改Dockerfile中的镜像
registry.cn-hangzhou.aliyuncs.com/wgh9626/static:nonroot

再次执行,这次没有连接docker.io了,pod创建成功,两个task都执行成功了。

file

file

查看镜像:

file

查看部署日志:

file

查看部署情况:

file

file

我这里机器资源不足,所以注释了values.yaml中的resource。

file

部署中会出现探针检测失败的情况,在cloneset.yaml 中注释掉探针检测。所以ControllerRevision会有三个。

file

在argocd中点击sync即可。

0 0 投票数
文章评分
订阅评论
提醒
guest

0 评论
最旧
最新 最多投票
内联反馈
查看所有评论

相关文章

开始在上面输入您的搜索词,然后按回车进行搜索。按ESC取消。

返回顶部
0
希望看到您的想法,请您发表评论x