soreana commented on PR #6809:
URL: https://github.com/apache/cloudstack/pull/6809#issuecomment-1838884132
> The situation is exactly the same as I commented on Jan 23, changing the
global setting works properly (updating the database and agent.properties
files) but the reset functionality (reset configuration) resets only the global
setting, not the database and agent.properties files.
>
> The intial value is 1024:
>
> ```
> (localcloud) 🐱 > list configurations name=host.reserved.mem.mb
> {
> "configuration": [
> {
> "category": "Advanced",
> "component": "ConfigurationManagerImpl",
> "defaultvalue": "1024",
> "description": "Set an upper limit for memory in megabytes which
will be reserved for host and not used for VM allocation.",
> "displaytext": "Host reserved mem mb",
> "group": "Hypervisor",
> "isdynamic": true,
> "name": "host.reserved.mem.mb",
> "subgroup": "Hypervisor",
> "type": "Number",
> "value": "1024"
> }
> ],
> "count": 1
> }
> ```
>
> We change it to 2048:
>
> ```
> (localcloud) 🐱 > update configuration name=host.reserved.mem.mb value=2048
> {
> "configuration": {
> "category": "Advanced",
> "component": "ConfigurationManagerImpl",
> "defaultvalue": "1024",
> "description": "Set an upper limit for memory in megabytes which will
be reserved for host and not used for VM allocation.",
> "displaytext": "Host reserved mem mb",
> "group": "Hypervisor",
> "isdynamic": true,
> "name": "host.reserved.mem.mb",
> "subgroup": "Hypervisor",
> "type": "Number",
> "value": "2048"
> }
> ```
>
> The database is properly set:
>
> ```
> mysql> select dom0_memory,ram from host where type="Routing" and removed
is null\G
> *************************** 1. row ***************************
> dom0_memory: 2147483648
> ram: 6154563584
> *************************** 2. row ***************************
> dom0_memory: 2147483648
> ram: 6154563584
> 2 rows in set (0.00 sec)
> ```
>
> and the agent.properties files:
>
> ```
> # cat /etc/cloudstack/agent/agent.properties | grep reserved
> host.reserved.mem.mb=2048
> ```
>
> Now we reset the global configuration parameter:
>
> ```
> (localcloud) 🐱 > reset configuration name=host.reserved.mem.mb
> {
> "configuration": {
> "category": "Advanced",
> "component": "ConfigurationManagerImpl",
> "defaultvalue": "1024",
> "description": "Set an upper limit for memory in megabytes which will
be reserved for host and not used for VM allocation.",
> "displaytext": "Host reserved mem mb",
> "group": "Hypervisor",
> "isdynamic": true,
> "name": "host.reserved.mem.mb",
> "subgroup": "Hypervisor",
> "type": "Number",
> "value": "1024"
> }
> }
> ```
>
> It properly shows the original value (1024). The database is not updated
though:
>
> ```
> mysql> select dom0_memory,ram from host where type="Routing" and removed
is null\G
> *************************** 1. row ***************************
> dom0_memory: 2147483648
> ram: 6154563584
> *************************** 2. row ***************************
> dom0_memory: 2147483648
> ram: 6154563584
> 2 rows in set (0.00 sec)
> ```
>
> and the agent.properties files are not updated too:
>
> ```
> # cat /etc/cloudstack/agent/agent.properties | grep reserved
> host.reserved.mem.mb=2048
> ```
@vladimirpetrov Thanks for testing the PR, I found the root cause, I'm
working on that.
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