Unattended Simulated Mode

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【0.架構】

• Haizea Configuration File - 一個文字檔包含一些選項
• Request Tracefile - 一個文字檔包含了租約的需求

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【1.配置】

【1.1 Haizea Configuration File】

從上圖架構知道，要使用 Haiea 的第一步便是要撰寫一篇好的 Haizea Configuration File，官方文件說可以參考範例檔 /usr/share/haizea/etc/sample_trace.conf 和 sample_trace_barebones (兩個文件內容一樣，只差再第2份沒註解)，文檔中要注意的地方是 option 的設定和配置

• 以下面範例來解說 option，便是『模擬』 2006-11-25 下午1點開始執行任務在 4台有1顆CPU 和1G Ram 的機器上執行 ([simulation]->屬性名稱，startime、resources->屬性細部設定)

  [simulation]
  starttime: 2006-11-25 13:00:00
  resources: 4  CPU:100 Memory:1024
  

  • 
• ​參考的屬性值

【1.2 Tracefile File】

而 Tracefile 便是在 Haizea Configuration File 中的 [tracefile] 屬性指定

[tracefile]
tracefile: /usr/share/haizea/traces/sample.lwf

• 此 Tracefile 範例檔的格式為 LWF/Lease Workload Format (類似 XML 的格式)

  <lease-workload name="sample">
    <description>
    A simple trace where an AR lease preempts a 
    best-effort lease that is already running. 
    </description>
  
    <lease-requests>
    
    <!-- The lease requests are initially commented out -->
    
    <!-- First lease request -->
    <!--
    ...
    -->
  
    <!-- Second lease request -->
    <!--
    ...
    -->
    
    </lease-requests>
  </lease-workload>
  

• ​XML 格式參考

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【2.開始模擬】

現在我們使用已寫好的範例 configuration(sample_trace.conf) 和 tracefile(sample.lwf)，便可透過haizea 指令開始執行模擬 (參數 -c 為指定設定檔)

【2.1 範例一】

haizea -c /usr/share/haizea/etc/sample_trace.conf
[2006-11-25 13:00:00.00] RM      Starting resource manager
[2006-11-25 13:00:00.00] TFILE   Loading tracefile /usr/share/haizea/traces/sample.lwf
[2006-11-25 13:00:00.00] TFILE   Loaded workload with 0 requests ()
[2006-11-25 13:00:00.00] CLOCK   Starting simulated clock
[2006-11-25 13:00:00.00] CLOCK   Simulated clock has stopped
[2006-11-25 13:00:00.00] RM      Stopping resource manager gracefully...
[2006-11-25 13:00:00.00] RM      --- Haizea status summary ---
[2006-11-25 13:00:00.00] RM      Number of leases (not including completed): 0
[2006-11-25 13:00:00.00] RM      Completed leases: 0
[2006-11-25 13:00:00.00] RM      ---- End summary ----

• 此結果輸出主要有三類：RM(Resource Manager)、TFILE(TraceFile)、CLOCK
  • RM Starting resource manager：啟動資源管理者
  • TFILE Loading tracefile /usr/share/haizea/traces/sample.lwf：載入 tracefile
  • TFILE Loaded workload with 0 requests ()：此範例檔並無租約要求
  • CLOCK Starting simulated clock：開始模擬的 clock
  • CLOCK Simulated clock has stopped：停止模擬的 clock

【2.2 範例一之版本1】

• 現在我們修改 TraceFile (將註解的第18行和第34行打開)

  19         <lease-request arrival="00:00:00">
  20         <lease preemptible="true">
  21                 <nodes>
  22                         <node-set numnodes="1">
  23                                 <res type="CPU" amount="100"/>
  24                                 <res type="Memory" amount="1024"/>
  25                         </node-set>
  26                 </nodes>        
  27                 <start></start>
  28                 <duration time="01:00:00"/>
  29         <software>
  30           <disk-image id="foobar.img" size="1024"/>
  31         </software>
  32         </lease>
  33         </lease-request>
  

• 再執行它

  haizea -c /usr/share/haizea/etc/sample_trace.conf
  [2006-11-25 13:00:00.00] RM      Starting resource manager
  [2006-11-25 13:00:00.00] TFILE   Loading tracefile /usr/share/haizea/traces/sample.lwf
  [2006-11-25 13:00:00.00] TFILE   Loaded workload with 1 requests (1 Best-effort)
  [2006-11-25 13:00:00.00] CLOCK   Starting simulated clock
  [2006-11-25 13:00:00.00] LSCHED  Lease #1 has been requested.
  [2006-11-25 13:00:00.00] LSCHED  Lease #1 has been marked as pending.
  [2006-11-25 13:00:00.00] LSCHED  Queued best-effort lease request #1, 1 nodes for 01:00:00.00.
  [2006-11-25 13:00:00.00] LSCHED  Next request in the queue is lease 1. Attempting to schedule...
  [2006-11-25 13:00:00.00] VMSCHED Lease #1 has been scheduled on nodes [1] from 2006-11-25 13:00:00.00 to 2006-11-25 14:00:00.00
  [2006-11-25 13:00:00.00] VMSCHED Started VMs for lease 1 on nodes [1]
  [2006-11-25 14:00:00.00] VMSCHED Stopped VMs for lease 1 on nodes [1]
  [2006-11-25 14:00:00.00] VMSCHED Lease 1's VMs have shutdown.
  [2006-11-25 14:00:00.00] CLOCK   Simulated clock has stopped
  [2006-11-25 14:00:00.00] RM      Stopping resource manager gracefully...
  [2006-11-25 14:00:00.00] RM      --- Haizea status summary ---
  [2006-11-25 14:00:00.00] RM      Number of leases (not including completed): 0
  [2006-11-25 14:00:00.00] RM      Completed leases: 1
  [2006-11-25 14:00:00.00] RM      ---- End summary ----
  

• 兩個 CLOCK 之間多了LSCHED(租約排程) 和 VMSCHED(VM排程)
  • LSCHED Lease #1 has been requested.
  • LSCHED Lease #1 has been marked as pending.
  • LSCHED Queued best-effort lease request #1, 1 nodes for 01:00:00.00.
  • LSCHED Next request in the queue is lease 1. Attempting to schedule...
  • VMSCHED Lease #1 has been scheduled on nodes [1] from 2006-11-25 13:00:00.00 to 2006-11-25 14:00:00.00
  • VMSCHED Started VMs for lease 1 on nodes [1]
  • VMSCHED Stopped VMs for lease 1 on nodes [1]
  • VMSCHED Lease 1's VMs have shutdown.

【2.2 範例一之版本2】