Ambari Blueprints 学习笔记

思维导图

Ambari Blueprints.png

是什么

Ambari Blueprints 是用来自动化安装hdp组件的配置文件,它告诉ambari:要安装什么service/component,安装在哪里。

它通过REST API与ambari交互,上传和更新配置。

前提

Ambari server/agent已经安装完成

步骤

  1. Step 1: 手工写或者下载现有hdp系统的blueprint文件。

    下载方法:

    GET /api/v1/clusters/:clusterName?format=blueprint

    e.g.

    $ curl  -H "X-Requested-By: ambari" --user admin:admin \
    > -X GET http://localhost:8080/api/v1/clusters/RoyCLUSTER?format=blueprint > mybl.json
    

可以先手工安装HDP,再用上面的办法把blueprint 下载下来,如此就获取了一个真实的配置文件,可以在这个文件的基础上做修改。

下面就是这个配置文件的简化版,介绍它的框架结构。

Blueprint Structure
{
  "configurations" : [
        ### 定义hdp里面各个组件的配置,也可以不写,使用默认配置。
  ],
  "host_groups" : [
     {
       "configurations" : [ ],
       "components" : [
          { "name": "NODEMANAGER" },
          { "name": "DATANODE" },
          { "name" : "METRICS_MONITOR" }
        ],
       "name" : "slavenode",
       "cardinality" : "5"
     },
      {
       ###   定义哪个host group 安装什么component。
      }  ...
  ],
  "settings" : [
    ### 其它设置,比如component自启动。可以不写。
  ],
  "Blueprints" : {
    "stack_name" : "HDP",
    "stack_version" : "2.6"
      ### Blueprint and stack information
  }
}
  1. Step 2: Register Blueprint with Ambari

    POST /api/v1/blueprints/:blueprintName

    e.g.

    $ curl  -H "X-Requested-By: ambari" --user admin:admin \ 
    > -X POST http://localhost:8080/api/v1/blueprints/cluster_blueprint \
    > [email protected]
    

    这个blueprint文件就是上一步生成的mybl.json

  2. Step 3: Create Cluster Template

    把 host 和 blueprint file 中的 host_group 对应起来。

    File: hostmapping-3.json

    {
      "blueprint" : "cluster_blueprint",
      "repository_version_id": 1,  # local repo 需要,否则删除。
      "default_password" : "admin",
      "configurations" : [
      ],
      "host_groups" :[
        {
          "name" : "host_group_1",
          "hosts" : [
            {
              "fqdn" : "roy-vm-hdp-1"
            }
          ]
        },
        {
          "name" : "host_group_2",
          "hosts" : [
            {
              "fqdn" : "roy-vm-hdp-2"
            }
          ]
        },
            {
          "name" : "host_group_3",
          "hosts" : [
            {
              "fqdn" : "roy-vm-hdp-3"
            }
          ]
        }
      ]
    }
    
  3. Step 4: Create Cluster (让ambari安装hdp组件)

    POST /api/v1/clusters/:clusterName

    e.g.

    $ curl -H "X-Requested-By: ambari" -X POST -u admin:admin  \ 
    > http://localhost:8080/api/v1/clusters/roycluster -d@/tmp/hostmapping-3.json
    

    hostmap告诉它用哪一个blueprint。

  4. Step 5: Monitor Cluster Creation Progress

    GET /api/v1/clusters/:clusterName/requests/1

    e.g.

    $ curl  -H "X-Requested-By: ambari" --user admin:admin \ 
    > -X GET  http://localhost:8080/api/v1/clusters/EEACLUSTER/requsts/1 | more
      % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                     Dload  Upload   Total   Spent    Left  Speed
    100 19305  100 19305    0     0   417k      0 --:--:-- --:--:-- --:--:--  418k
    {
      "href" : "http://localhost:8080/api/v1/clusters/EEACLUSTER/requests/1";,
      "Requests" : {
        "aborted_task_count" : 0,
        "cluster_name" : "EEACLUSTER",
        "completed_task_count" : 75,
        "create_time" : 1518333235226,
        "end_time" : -1,
        "exclusive" : false,
        "failed_task_count" : 0,
        "id" : 1,
        "inputs" : null,
        "operation_level" : null,
        "progress_percent" : 100.0,
        "queued_task_count" : 0,
        "request_context" : "Logical Request: Provision Cluster 'EEACLUSTER'",
        "request_schedule" : null,
        "request_status" : "COMPLETED",
        "resource_filters" : null,
        "start_time" : -1,
        "task_count" : 75,
        "timed_out_task_count" : 0,
        "type" : null
      },
      ...
    

参考文档:

https://cwiki.apache.org/confluence/display/AMBARI/Blueprints

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