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Task #6875

Task #6869: Challenge OpenStack and OpenNebula with ucloud

Create ucloud-scheduler

Added by Nico Schottelius 4 months ago. Updated 3 months ago.

Status:
In Progress
Priority:
Normal
Assignee:
Target version:
-
Start date:
06/24/2019
Due date:
% Done:

50%

Estimated time:
PM Check date:

Description

Reads / watches keys below /v1/vm (later probably as well /v1/networks?)

The JSON of the VM should contain a "status" field. On submit, the status should be "REQUESTED_NEW" (-> need to update ucloud-api).

Creating VM

The scheduler watches for changes on the key prefix. If the status is REQUEST_NEW, find a suitable host for deploying the VM to.
Update the status field to "SCHEDULED_DEPLOY". Also add a new field "host" that contains the hostname of the host the VM should be running on.

Deleting VM

The scheduler watches for changes on the key prefix. If the status is REQUEST_DELETE, do nothing -> ucloud-vm needs to react and will update the field.

APIs

ucloud scheduler only reacts on etcd changes and does not have a direct accessible API.

History

#1

Updated by Ahmed Bilal 4 months ago

  • Status changed from New to Seen
#2

Updated by Nico Schottelius 4 months ago

To be solved / undefined at the moment:

  • Which component writes information about hosts? Do we have a key prefix /v1/host/<id>?
    • If yes, do we need ucloud-host?
  • Or do we use (existing) consul?
    • consul is indeed an alternative to etcd for us as well

For the start:

  • Create /v1/host and fill it up manually -- Balazs might also have some ideas on this
#3

Updated by Ahmed Bilal 4 months ago

  • Status changed from Seen to In Progress
#4

Updated by Ahmed Bilal 4 months ago

Now, using etcd3 instead of using coreos/etcd python binding because the latter does not have support to watch a prefix e.g /v1/vm

This has implication that we can't access etcd v2 data from v3 API and vice versa. So, instead of usual `etcdctl` we need to use `ETCDCTL_API=3 etcdctl`.

#5

Updated by Ahmed Bilal 4 months ago

v1 is ready. It can be found here
@william and ll nu is notified to verify its working.

#6

Updated by Ahmed Bilal 4 months ago

  • % Done changed from 0 to 50
#7

Updated by Ahmed Bilal 4 months ago

  • Status changed from In Progress to Waiting
#8

Updated by Ahmed Bilal 4 months ago

  • Status changed from Waiting to Feedback
#9

Updated by Ahmed Bilal 3 months ago

  • Status changed from Feedback to In Progress

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