[GitHub] [cloudstack] vladimirpetrov commented on pull request #6809: Reserve memory for host

["vladimirpetrov (via GitHub)" <gi...@apache.org>]

vladimirpetrov commented on PR #6809:
URL: https://github.com/apache/cloudstack/pull/6809#issuecomment-1400620736

   Manual setting of values works fine but the reset functionality doesn't change the value in database:
   
   ```
   (localcloud) 🐱 > update configuration name=host.reserved.mem.mb value=2048
   {
     "configuration": {
       "category": "Advanced",
       "description": "Set an upper limit for memory in megabytes which will be reserved for host and not used for VM allocation.",
       "isdynamic": true,
       "name": "host.reserved.mem.mb",
       "value": "2048"
     }
   }
   
   (localcloud) 🐱 > list configurations name=host.reserved.mem.mb
   {
     "configuration": [
       {
         "category": "Advanced",
         "description": "Set an upper limit for memory in megabytes which will be reserved for host and not used for VM allocation.",
         "isdynamic": true,
         "name": "host.reserved.mem.mb",
         "value": "2048"
       }
     ],
     "count": 1
   }
   
   mysql> select dom0_memory,ram from host where type="Routing" and removed is null\G
   *************************** 1. row ***************************
   dom0_memory: 1073741824
           ram: 7234621440
   *************************** 2. row ***************************
   dom0_memory: 1073741824
           ram: 7234629632
   2 rows in set (0,00 sec)
   ```
   But when the 'reset' functionality is used:
   ```
   (localcloud) 🐱 > reset configuration name=host.reserved.mem.mb
   {
     "configuration": {
       "category": "Advanced",
       "description": "Set an upper limit for memory in megabytes which will be reserved for host and not used for VM allocation.",
       "isdynamic": true,
       "name": "host.reserved.mem.mb",
       "value": "1024"
     }
   }
   ```
   The value is changed only in the global setting, but not updated in the database:
   ```
   (localcloud) 🐱 > list configurations name=host.reserved.mem.mb
   {
     "configuration": [
       {
         "category": "Advanced",
         "description": "Set an upper limit for memory in megabytes which will be reserved for host and not used for VM allocation.",
         "isdynamic": true,
         "name": "host.reserved.mem.mb",
         "value": "1024"
       }
     ],
     "count": 1
   }
   
   mysql> select dom0_memory,ram from host where type="Routing" and removed is null\G
   *************************** 1. row ***************************
   dom0_memory: 2147483648
           ram: 6160879616
   *************************** 2. row ***************************
   dom0_memory: 2147483648
           ram: 6160887808
   2 rows in set (0,00 sec)
   ```


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