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c496c84c6c
The KVM Agent had two mechanisms for reporting its capabilities and memory to the Management Server. On startup it would ask libvirt the amount of Memory the Host has and subtract and add the reserved and overcommit memory. When the HostStats were however reported to the Management Server these two configured values on the Agent were no longer reported in the statistics thus showing all the available memory in the Agent/Host to the Management Server. This commit unifies this by using the same logic on Agent Startup and during statistics reporting. memory=3069636608, reservedMemory=1073741824 This was reported by a 4GB Hypervisor with this setting: host.reserved.mem.mb=1024 The GUI (thus API) would then show: Memory Total 2.86 GB This way the Agent properly 'lies' to the Management Server about its capabilities in terms of Memory. This is very helpful if you want to overprovision or undercommit machines for various reasons. Overcommitting can be done when KSM or ZSwap or a fast SWAP device is installed in the machine. Underprovisioning is done when the Host might run other tasks then a KVM hypervisor, for example when it runs in a hyperconverged setup with Ceph. In addition internally many values have been changed from a Double to a Long and also store the amount of bytes instead of Kilobytes. Signed-off-by: Wido den Hollander <wido@widodh.nl>