Wallaby will manage your configuration, as well as an inventory of your machines. It can differentiate between machines that are expected to be present and those that opportunistically appear.
Build the roster with wallaby add-node
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$ wallaby add-node node0.local node1.local node2.local Adding the following node: node0.local Console Connection Established... Adding the following node: node1.local Adding the following node: node2.local $ for i in $(seq 3 10); do wallaby add-node node$i.local; done Adding the following node: node3.local Console Connection Established... Adding the following node: node4.local Console Connection Established... ...
List expected nodes (provisioned) –
$ wallaby inventory Console Connection Established... P Node name Last checkin - --------- ------------ + node0.local Wed Jan 11 07:32:33 -0500 20 + node1.local Thu Jan 05 12:15:00 -0500 20 + node10.local Wed Jan 11 07:31:56 -0500 20 + node2.local Wed Jan 11 07:31:56 -0500 20 + node3.local Wed Jan 11 07:15:21 -0500 20 + node4.local Wed Jan 11 07:31:42 -0500 20 + node5.local Wed Jan 11 07:16:47 -0500 20 + node6.local never + node7.local Wed Jan 11 07:32:33 -0500 20 + node8.local Wed Jan 11 07:32:33 -0500 20 + node9.local Wed Jan 11 07:30:47 -0500 20 - robin.local Thu Dec 15 14:11:35 -0500 20 - woods.local Tue Jan 10 20:33:47 -0500 20
List opportunistic, bonus nodes (unprovisioned) –
$ wallaby inventory -o unprovisioned Console Connection Established... P Node name Last checkin - --------- ------------ - robin.local Thu Dec 15 14:11:35 -0500 20 - woods.local Tue Jan 10 20:33:47 -0500 20
Provisioned nodes that have never checked in, maybe setup failed –
$ wallaby inventory -c 'last_checkin == 0 && provisioned' Console Connection Established... P Node name Last checkin - --------- ------------ + node6.local never
Provisioned node that have not checked in for the past 4 hours, maybe machine is down –
$ wallaby inventory -c 'last_checkin > 0 && last_checkin < 4.hours_ago && provisioned' Console Connection Established... P Node name Last checkin - --------- ------------ + node1.local Thu Jan 05 12:15:00 -0500 20
Unprovisioned nodes that have not checked in for 48 hours, candidates for wallaby remove-node
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$ wallaby inventory -c 'last_checkin < 48.hours_ago && !provisioned' Console Connection Established... P Node name Last checkin - --------- ------------ - robin.local Thu Dec 15 14:11:35 -0500 20
Enjoy.
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