3.2. 使用优先级类指定管道资源配额

流程

1. 为管道创建优先级类。

   示例：管道的优先级类

   apiVersion: scheduling.k8s.io/v1
   kind: PriorityClass
   metadata:
     name: pipeline1-pc
   value: 1000000
   description: "Priority class for pipeline1"

   Copy to Clipboard Toggle word wrap

2. 为管道创建资源配额。

   示例：管道的资源配额

   apiVersion: v1
   kind: ResourceQuota
   metadata:
     name: pipeline1-rq
   spec:
     hard:
       cpu: "1000"
       memory: 200Gi
       pods: "10"
     scopeSelector:
       matchExpressions:
       - operator : In
         scopeName: PriorityClass
         values: ["pipeline1-pc"]

   Copy to Clipboard Toggle word wrap

3. 验证管道的资源配额使用量。

   示例：验证管道的资源配额使用情况

   $ oc describe quota

   Copy to Clipboard Toggle word wrap

   输出示例

   Name:       pipeline1-rq
   Namespace:  default
   Resource    Used  Hard
   --------    ----  ----
   cpu         0     1k
   memory      0     200Gi
   pods        0     10

   Copy to Clipboard Toggle word wrap

   由于容器集没有运行，因此配额没有被使用。

4. 创建管道和任务。

   示例：管道的 YAML

   apiVersion: tekton.dev/v1
   kind: Pipeline
   metadata:
     name: maven-build
   spec:
     params:
     - name: GIT_URL
     workspaces:
     - name: local-maven-repo
     - name: source
     tasks:
     - name: git-clone
       taskRef:
         resolver: cluster
         params:
         - name: kind
           value: task
         - name: name
           value: git-clone
         - name: namespace
           value: openshift-pipelines
       workspaces:
       - name: output
         workspace: source
       params:
       - name: URL
         value: $(params.GIT_URL)
     - name: build
       taskRef:
         name: mvn
       runAfter: ["git-clone"]
       params:
       - name: GOALS
         value: ["package"]
       workspaces:
       - name: maven-repo
         workspace: local-maven-repo
       - name: source
         workspace: source
     - name: int-test
       taskRef:
         name: mvn
       runAfter: ["build"]
       params:
       - name: GOALS
         value: ["verify"]
       workspaces:
       - name: maven-repo
         workspace: local-maven-repo
       - name: source
         workspace: source
     - name: gen-report
       taskRef:
         name: mvn
       runAfter: ["build"]
       params:
       - name: GOALS
         value: ["site"]
       workspaces:
       - name: maven-repo
         workspace: local-maven-repo
       - name: source
         workspace: source

   Copy to Clipboard Toggle word wrap

   示例：管道中任务的 YAML

   apiVersion: tekton.dev/v1
   kind: Task
   metadata:
     name: mvn
   spec:
     workspaces:
     - name: maven-repo
     - name: source
     params:
     - name: GOALS
       description: The Maven goals to run
       type: array
       default: ["package"]
     steps:
       - name: mvn
         image: gcr.io/cloud-builders/mvn
         workingDir: $(workspaces.source.path)
         command: ["/usr/bin/mvn"]
         args:
           - -Dmaven.repo.local=$(workspaces.maven-repo.path)
           - "$(params.GOALS)"

   Copy to Clipboard Toggle word wrap

5. 创建并启动管道运行。

   示例：管道运行的 YAML

   apiVersion: tekton.dev/v1
   kind: PipelineRun
   metadata:
     generateName: petclinic-run-
   spec:
     pipelineRef:
       name: maven-build
     params:
     - name: GIT_URL
       value: https://github.com/spring-projects/spring-petclinic
     taskRunTemplate:
       podTemplate:
         priorityClassName: pipeline1-pc
     workspaces:
     - name: local-maven-repo
       emptyDir: {}
     - name: source
       volumeClaimTemplate:
         spec:
           accessModes:
             - ReadWriteOnce
           resources:
             requests:
               storage: 200M

   Copy to Clipboard Toggle word wrap

   注意

   管道运行可能会失败，并显示错误：failed quota: <quota name> must specify cpu, memory。

   要避免这个错误，请为命名空间设置一个限制范围，其中 LimitRange 对象中的默认值应用到构建过程中创建的 pod。

   有关设置限制范围的更多信息，请参阅附加资源部分中的限制范围限制资源消耗。

6. 创建 pod 后，验证管道运行的资源配额使用量。

   示例：验证管道的资源配额使用情况

   $ oc describe quota

   Copy to Clipboard Toggle word wrap

   输出示例

   Name:       pipeline1-rq
   Namespace:  default
   Resource    Used  Hard
   --------    ----  ----
   cpu         500m  1k
   memory      10Gi  200Gi
   pods        1     10

   Copy to Clipboard Toggle word wrap

   输出表明，您可以通过指定每个优先级类的资源配额，为属于优先级类的所有并发运行 pod 管理组合资源配额。