Memory Allocation

Chka

unread,

Mar 2, 2018, 5:03:43 PM3/2/18

to Nomad

Hi,

I have following memories available in a three node cluster.

nomad@ip-10-3-1-0:~$ free -m

total used free shared buff/cache available

Mem: 16046 14248 155 157 1642 1221

Swap: 0 0 0

nomad@ip-10-3-1-1:~$ free -m

total used free shared buff/cache available

Mem: 16046 14203 199 149 1643 1274

Swap: 0 0 0

nomad@ip-10-3-1-2:~$ free -m

total used free shared buff/cache available

Mem: 16046 11861 183 149 4000 3588

Swap: 0 0 0

For some reason, nomad fails to run a task that requires 512M memory,

Placement Failure

Task Group "service":

* Resources exhausted on 3 nodes

* Dimension "memory" exhausted on 3 nodes

So the question is, isn't `Available` memory used to calculate resource allocation?

Thanks,

Chka

Chelsea Komlo

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Mar 5, 2018, 10:33:10 AM3/5/18

to Chka, Nomad

Hi, thanks for writing us about this.

What is the output of `/v1/node/<id>` for each node? This should tell you the resources that Nomad thinks is available for that node. See here for more information: https://www.nomadproject.io/api/nodes.html#node_id

Thanks,

Chelsea

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