Is it possible to get free memory/CPU for the cluster or at least for all nodes through API? I can see this information in nomad node status <node-name-or-id> but I can’t in /nodes endpoint.
I can see storage data:
'unique.storage.bytesfree': '120788234240',
'unique.storage.bytestotal': '128837464064',
but for memory only total:
'memory.totalbytes': '32667799552',
and reserved resources has zero values:
'ReservedResources': {'Cpu': {'CpuShares': 0, 'ReservedCpuCores': None},
'Disk': {'DiskMB': 0},
'Memory': {'MemoryMB': 0},
'Networks': {'ReservedHostPorts': ''}},
You could try the v1/metrics endpoint of the API. I think could get total amount of memory, current usage, allocated memory and much more.
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v1/metrics endpoint:
Metrics - HTTP API | Nomad | HashiCorp Developer -
Some metrics:
nomad.client.host.memory.available
nomad.client.host.memory.free
nomad.client.host.memory.total
nomad.client.host.memory.used
nomad.client.allocated.memory
Metrics Reference | Nomad | HashiCorp Developer
Let us know if this solves your use case.
1 Like
I’m already using the metrics approach, but is there really no other way? It seems that the /node endpoint has an allocated field, but it’s returning no data - all the fields have zero value"… Also, we have clusters with ~20 nodes and we need to visit EACH endpoint for EACH node.