【ONE Schedule 測試】

1.機器資訊

• 硬體
  • one -> Ram 4G，sda6(mdt)，sda7(ost1)
  • one01 -> Ram 2G，sdb1(ost2)，sdb2(ost3)
• 軟體 -> Lenny(5.0)，Xen(3.3.1)，Lustre(1.6.6)，OpenNEbula(1.2)

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2.正常 Case

• 2.1 CPU Case:
  1. VM 需要 Free CPU，讓 one01 跑 make kernel (one 則不執行動作)，測試是否會 deploy 在 one 上

     ### 再 one01上執行 ###
     $ wget http://www.kernel.org/pub/linux/kernel/v2.6/linux-2.6.29.tar.bz2
     $ tar jxvf linux-2.6.29.tar.bz2
     $ cd linux-2.6.29 || make 
     
     ### 再 one (ONE Server) 上執行 ###
     $ vim vm01.one 
     NAME   = vm01                                                                                           
     CPU    = 1                                                                                              
     MEMORY = 156                                                                                            
     OS = [ kernel     = /boot/vmlinuz-2.6.22.9,                                                             
            initrd     = /boot/initrd.img-2.6.22.9,                                                          
            root       = sda2,                                                                               
           kernel_cmd = "ro xencons=tty console=tty1" ]                                                      
     DISK = [ source   = /home/domains/vm01/disk.img,                                                        
              clone    = no,                                                                                 
              target   = sda2,                                                                               
              readonly = no]                                                                                 
     DISK = [  type     = swap,                                                                              
               size     = 512,                                                                               
               target   = "sda1",                                                                            
               readonly = "no" ]                                                                             
     NIC = [NETWORK="Public",IP="X.X.X.X",MAC="00:03:8c:6e:8a:a0"]                                   
     REQUIREMENTS= "FREECPU > 200"                                                                           
     RANK = FREECPU
     
     $ onevm -v create vm01.one
     ID: 25
     
     $ watch onevm list
       ID     NAME STAT CPU     MEM        HOSTNAME        TIME
       25     vm01 runn   0  159744             one 00 00:02:30
     
     ### 前面 PIR 是優先權，HID 則是 Host 的 ID (這邊的 HID 0 是指 one) ###
     $ tail /home/one/var/sched.log 
     Fri May  1 12:03:09 2009 [SCHED][I]: Dispatching virtual machine 24 to HID: 0                           
     Fri May  1 12:03:39 2009 [HOST][D]: Discovered Hosts (enabled): 0 1                                     
     Fri May  1 12:03:39 2009 [VM][D]: Pending virtual machines : 25                                         
     Fri May  1 12:03:39 2009 [SCHED][I]: Select hosts                                                       
             PRI     HID     HSID                                                                            
             -------------------                                                                             
     Virtual Machine: 25                                                                                     
             1       0    
     

• 2.2 Memory Case:
  1. VM 需要 1G Memory，讓 one 的記憶體只剩 512M (one01 則有2G)，測試是否 deploy one01

  2. VM 需要 HOST Total Mem > 1G ， Free Mem 最多的 Host 為優先

     $ vim vm02.one
     略
     REQUIREMENTS= "TOTALMEMORY > 1000000"                                                               
     RANK = FREEMEMORY
     
     $ onehost list
      HID NAME                      RVM   TCPU   FCPU   ACPU    TMEM    FMEM STAT
        0 one                         0    400    384    400 6216704  263168   on
        1 one01                       1    400    399    300 2071552  320512   on
     
     $ onevm create -v vm02.one
     ID: 27
     
     $ onehost list
      HID NAME                      RVM   TCPU   FCPU   ACPU    TMEM    FMEM STAT
        0 one                         0    400    384    400 6216704  263168   on
        1 one01                       1    400    398    300 2071552  160768   on
     
     $ onevm list
       ID     NAME STAT CPU     MEM        HOSTNAME        TIME
       31     vm02 runn   0  159744           one01 00 00:03:39
     
     $ tail /home/one/var/sched.log
     14140 Fri May  1 13:15:09 2009 [HOST][D]: Discovered Hosts (enabled): 0 1                               
     14141 Fri May  1 13:15:09 2009 [VM][D]: Pending virtual machines : 31                                   
     14142 Fri May  1 13:15:09 2009 [SCHED][I]: Select hosts                                                 
     14143         PRI     HID     HSID                                                                      
     14144         -------------------                                                                       
     14145 Virtual Machine: 31                                                                               
     14146         1       1                                                                                 
     14147         0.821086        0
     

• 2.3 CPU 和 Memory Case:
  1. VM 需要 CPU 使用率 < 200 和 記憶體需大於 512MB 的 Host

     $ vim vm03.one
     略                                                          
     REQUIREMENTS= "USEDCPU < 200 & FREEMEMORY > 512000"                                                        
     RANK= FREECPU         
     
     $ onevm create -v vm03.one
     ID: 20 
     
     $ watch onevm list
       ID     NAME STAT CPU     MEM        HOSTNAME        TIME
       20     vm03 runn   0  159744           one01 00 00:05:10
     
     ### HID 1 的分數為 1 而 HID 0 分數為 0.982456，所以 deploy vm03 到 HID 1 (one01) ###
     $ tail /home/one/vat/sched.log
     Fri May  1 11:37:09 2009 [HOST][D]: Discovered Hosts (enabled): 0 1                               
     Fri May  1 11:37:09 2009 [VM][D]: Pending virtual machines : 20                                   
     Fri May  1 11:37:09 2009 [SCHED][I]: Select hosts                                                 
              PRI     HID     HSID                                                                      
              -------------------                                                                       
      Virtual Machine: 20                                                                               
              1       1                                                                                 
              0.982456        0 
     

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3.錯誤 Case

• Case 1 -> 測試 Xen 本身對於超過需求的 VM (Xen 本身的錯誤檢查機制)，會如何顯示 Create VM 的錯誤訊息
  • VM 要 8G 的 ram (one 只有4G)

    ### 若有設定 dom0_min_mem ，當 VM 要求超過 dom0 的記憶體最小值時會出現以下提示訊息，無法開啟 VM ###
    $ sudo xm create -c vm02.cfg 
    Using config file "./vm02.cfg".
    Error: I need 8487936 KiB, but dom0_min_mem is 524288 and shrinking to 524288 KiB would leave only 5586844 KiB free.
    

  • VM 要 6 CPU (one01 只有4 CPU)
• Case 2 -> VM 需要 Free CPU，但 one 和 one01 都執行 makec kernel，會如何 deploy
• Case 3 -> VM 需要 1G Memory， 但 one 和 one01 都只剩 512M，會如何 deploy

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4.紀錄

• 若 Requirement 都不符合時，或一直處於 pend 狀態，直到符合的 Host 出現才 deploy
• Schedule 判斷的資訊是取自於 ?
  • FMEM 的資訊